@import "https://fonts.googleapis.com/css2?family=Outfit:wght@800&family=Lexend:wght@300;400;500;600;700;800&display=swap";
@font-face{font-family:Lexend;font-style:normal;font-weight:300;font-display:swap;src:url(../media/08328e320c8f68d1-s.068q2mbkdvzxv.woff2)format("woff2");unicode-range:U+102-103,U+110-111,U+128-129,U+168-169,U+1A0-1A1,U+1AF-1B0,U+300-301,U+303-304,U+308-309,U+323,U+329,U+1EA0-1EF9,U+20AB}@font-face{font-family:Lexend;font-style:normal;font-weight:300;font-display:swap;src:url(../media/ce5b45ab00236ec9-s.0e2v01fdnfw~o.woff2)format("woff2");unicode-range:U+100-2BA,U+2BD-2C5,U+2C7-2CC,U+2CE-2D7,U+2DD-2FF,U+304,U+308,U+329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:Lexend;font-style:normal;font-weight:300;font-display:swap;src:url(../media/ca31d6821328a4e9-s.p.0w8w9q576xw20.woff2)format("woff2");unicode-range:U+??,U+131,U+152-153,U+2BB-2BC,U+2C6,U+2DA,U+2DC,U+304,U+308,U+329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}@font-face{font-family:Lexend;font-style:normal;font-weight:400;font-display:swap;src:url(../media/08328e320c8f68d1-s.068q2mbkdvzxv.woff2)format("woff2");unicode-range:U+102-103,U+110-111,U+128-129,U+168-169,U+1A0-1A1,U+1AF-1B0,U+300-301,U+303-304,U+308-309,U+323,U+329,U+1EA0-1EF9,U+20AB}@font-face{font-family:Lexend;font-style:normal;font-weight:400;font-display:swap;src:url(../media/ce5b45ab00236ec9-s.0e2v01fdnfw~o.woff2)format("woff2");unicode-range:U+100-2BA,U+2BD-2C5,U+2C7-2CC,U+2CE-2D7,U+2DD-2FF,U+304,U+308,U+329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:Lexend;font-style:normal;font-weight:400;font-display:swap;src:url(../media/ca31d6821328a4e9-s.p.0w8w9q576xw20.woff2)format("woff2");unicode-range:U+??,U+131,U+152-153,U+2BB-2BC,U+2C6,U+2DA,U+2DC,U+304,U+308,U+329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}@font-face{font-family:Lexend;font-style:normal;font-weight:500;font-display:swap;src:url(../media/08328e320c8f68d1-s.068q2mbkdvzxv.woff2)format("woff2");unicode-range:U+102-103,U+110-111,U+128-129,U+168-169,U+1A0-1A1,U+1AF-1B0,U+300-301,U+303-304,U+308-309,U+323,U+329,U+1EA0-1EF9,U+20AB}@font-face{font-family:Lexend;font-style:normal;font-weight:500;font-display:swap;src:url(../media/ce5b45ab00236ec9-s.0e2v01fdnfw~o.woff2)format("woff2");unicode-range:U+100-2BA,U+2BD-2C5,U+2C7-2CC,U+2CE-2D7,U+2DD-2FF,U+304,U+308,U+329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:Lexend;font-style:normal;font-weight:500;font-display:swap;src:url(../media/ca31d6821328a4e9-s.p.0w8w9q576xw20.woff2)format("woff2");unicode-range:U+??,U+131,U+152-153,U+2BB-2BC,U+2C6,U+2DA,U+2DC,U+304,U+308,U+329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}@font-face{font-family:Lexend;font-style:normal;font-weight:600;font-display:swap;src:url(../media/08328e320c8f68d1-s.068q2mbkdvzxv.woff2)format("woff2");unicode-range:U+102-103,U+110-111,U+128-129,U+168-169,U+1A0-1A1,U+1AF-1B0,U+300-301,U+303-304,U+308-309,U+323,U+329,U+1EA0-1EF9,U+20AB}@font-face{font-family:Lexend;font-style:normal;font-weight:600;font-display:swap;src:url(../media/ce5b45ab00236ec9-s.0e2v01fdnfw~o.woff2)format("woff2");unicode-range:U+100-2BA,U+2BD-2C5,U+2C7-2CC,U+2CE-2D7,U+2DD-2FF,U+304,U+308,U+329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:Lexend;font-style:normal;font-weight:600;font-display:swap;src:url(../media/ca31d6821328a4e9-s.p.0w8w9q576xw20.woff2)format("woff2");unicode-range:U+??,U+131,U+152-153,U+2BB-2BC,U+2C6,U+2DA,U+2DC,U+304,U+308,U+329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}@font-face{font-family:Lexend;font-style:normal;font-weight:700;font-display:swap;src:url(../media/08328e320c8f68d1-s.068q2mbkdvzxv.woff2)format("woff2");unicode-range:U+102-103,U+110-111,U+128-129,U+168-169,U+1A0-1A1,U+1AF-1B0,U+300-301,U+303-304,U+308-309,U+323,U+329,U+1EA0-1EF9,U+20AB}@font-face{font-family:Lexend;font-style:normal;font-weight:700;font-display:swap;src:url(../media/ce5b45ab00236ec9-s.0e2v01fdnfw~o.woff2)format("woff2");unicode-range:U+100-2BA,U+2BD-2C5,U+2C7-2CC,U+2CE-2D7,U+2DD-2FF,U+304,U+308,U+329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:Lexend;font-style:normal;font-weight:700;font-display:swap;src:url(../media/ca31d6821328a4e9-s.p.0w8w9q576xw20.woff2)format("woff2");unicode-range:U+??,U+131,U+152-153,U+2BB-2BC,U+2C6,U+2DA,U+2DC,U+304,U+308,U+329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}@font-face{font-family:Lexend;font-style:normal;font-weight:800;font-display:swap;src:url(../media/08328e320c8f68d1-s.068q2mbkdvzxv.woff2)format("woff2");unicode-range:U+102-103,U+110-111,U+128-129,U+168-169,U+1A0-1A1,U+1AF-1B0,U+300-301,U+303-304,U+308-309,U+323,U+329,U+1EA0-1EF9,U+20AB}@font-face{font-family:Lexend;font-style:normal;font-weight:800;font-display:swap;src:url(../media/ce5b45ab00236ec9-s.0e2v01fdnfw~o.woff2)format("woff2");unicode-range:U+100-2BA,U+2BD-2C5,U+2C7-2CC,U+2CE-2D7,U+2DD-2FF,U+304,U+308,U+329,U+1D00-1DBF,U+1E00-1E9F,U+1EF2-1EFF,U+2020,U+20A0-20AB,U+20AD-20C0,U+2113,U+2C60-2C7F,U+A720-A7FF}@font-face{font-family:Lexend;font-style:normal;font-weight:800;font-display:swap;src:url(../media/ca31d6821328a4e9-s.p.0w8w9q576xw20.woff2)format("woff2");unicode-range:U+??,U+131,U+152-153,U+2BB-2BC,U+2C6,U+2DA,U+2DC,U+304,U+308,U+329,U+2000-206F,U+20AC,U+2122,U+2191,U+2193,U+2212,U+2215,U+FEFF,U+FFFD}@font-face{font-family:Lexend Fallback;src:local(Arial);ascent-override:90.98%;descent-override:22.74%;line-gap-override:0.0%;size-adjust:109.91%}.lexend_d51b964f-module__CnMXdW__className{font-family:Lexend,Lexend Fallback;font-style:normal}
:root{--bg:#020617;--bg-secondary:#0a1628;--text-primary:#f8fafc;--text-secondary:#94a3b8;--text-muted:#475569;--primary:#2563eb;--primary-hover:#1d4ed8;--cyan:#06b6d4;--gradient:linear-gradient(135deg, #2563eb, #06b6d4);--gradient-text:linear-gradient(135deg, #60a5fa, #22d3ee);--card-bg:#ffffff08;--card-bg-hover:#ffffff12;--border:#ffffff14;--border-hover:#60a5fa66;--correct:#10b981;--correct-bg:#10b9811f;--correct-border:#10b98166;--incorrect:#ef4444;--incorrect-bg:#ef44441f;--incorrect-border:#ef444466;--quiz:#8b5cf6;--quiz-bg:#8b5cf61f;--quiz-border:#8b5cf666;--glow-blue:#2563eb26;--glow-cyan:#06b6d41a;--font-title:"Outfit", sans-serif;--font-body:"Lexend", sans-serif}*{box-sizing:border-box;margin:0;padding:0}button,select,input,a{touch-action:manipulation}html{scroll-behavior:smooth}body{background:var(--bg);color:var(--text-primary);font-family:var(--font-body);min-height:100vh;line-height:1.6;position:relative;overflow-x:hidden}body:before{content:"";pointer-events:none;z-index:0;background:radial-gradient(#2563eb1f 0%,#0000 70%);width:70%;height:70%;animation:25s ease-in-out infinite alternate drift;position:fixed;top:-20%;left:-10%}body:after{content:"";pointer-events:none;z-index:0;background:radial-gradient(#06b6d414 0%,#0000 70%);width:60%;height:60%;animation:30s ease-in-out infinite alternate-reverse drift;position:fixed;bottom:-20%;right:-10%}.bg-blob-1,.bg-blob-2{pointer-events:none;z-index:-1;filter:blur(80px);opacity:.4;border-radius:50%;width:40%;height:40%;position:fixed}.bg-blob-1{background:radial-gradient(circle,#8b5cf60f 0%,#0000 70%);animation:35s ease-in-out infinite floating;top:30%;left:-10%}.bg-blob-2{background:radial-gradient(circle,#2563eb0d 0%,#0000 70%);animation:40s ease-in-out infinite reverse floating;bottom:20%;right:20%}@keyframes drift{0%{transform:translate(0)rotate(0)scale(1)}to{transform:translate(10%,5%)rotate(5deg)scale(1.1)}}@keyframes floating{0%,to{transform:translate(0)scale(1)}33%{transform:translate(30px,-50px)scale(1.05)}66%{transform:translate(-20px,40px)scale(.95)}}main{z-index:1;position:relative}.container{max-width:960px;margin:0 auto;padding:40px 24px}header{text-align:center;margin-bottom:48px;padding-top:20px}header h1{font-family:var(--font-title);letter-spacing:-.5px;background:var(--gradient-text);-webkit-text-fill-color:transparent;filter:drop-shadow(0 4px 15px #2563eb66);-webkit-background-clip:text;background-clip:text;flex-wrap:wrap;justify-content:center;align-items:center;gap:14px;margin-bottom:12px;font-size:2.6rem;font-weight:800;display:flex}header h1 svg{fill:url(#svgGrad);filter:drop-shadow(0 0 10px #2563eb99);-webkit-text-fill-color:initial;width:34px;height:34px}header p{color:var(--text-secondary);letter-spacing:.3px;font-size:1.05rem;font-weight:500}@keyframes fadeInSnappy{0%{opacity:0;filter:blur(4px);transform:translateY(8px)scale(.99)}to{opacity:1;filter:blur();transform:translateY(0)scale(1)}}@keyframes skeletonPulse{0%{background-color:#ffffff08}50%{background-color:#ffffff0f}to{background-color:#ffffff08}}.view-transition-container{animation:.25s cubic-bezier(.165,.84,.44,1) forwards fadeInSnappy}.skeleton{background:var(--card-bg);border-radius:12px;animation:1.5s ease-in-out infinite skeletonPulse}.image-placeholder{aspect-ratio:16/9;background:var(--card-bg);border-radius:16px;justify-content:center;align-items:center;width:100%;display:flex;overflow:hidden}.global-stats{flex-wrap:wrap;justify-content:center;gap:14px;margin-bottom:32px;display:flex}.stat-item{text-align:center;-webkit-backdrop-filter:blur(16px);background:linear-gradient(145deg,#1e293b66 0%,#0f172a99 100%);border:1px solid #ffffff08;border-top-color:#ffffff1a;border-radius:18px;min-width:110px;padding:14px 22px;transition:transform .3s cubic-bezier(.175,.885,.32,1.275),border-color .3s,box-shadow .3s;position:relative;overflow:hidden;box-shadow:0 8px 32px #0000004d}.stat-item:before{content:"";background:0 0;height:3px;transition:background .3s;position:absolute;top:0;left:0;right:0}.stat-item:hover{border-color:#ffffff1a;transform:translateY(-4px);box-shadow:0 12px 40px #0006}.stat-item span{font-family:var(--font-title);letter-spacing:-1px;text-shadow:0 1px 4px #0000004d;margin-bottom:4px;font-size:1.8rem;font-weight:600;display:block}.stat-item .label{color:var(--text-muted);text-transform:uppercase;letter-spacing:1.5px;font-size:.72rem;font-weight:600}.stat-item.total span{color:#60a5fa;text-shadow:0 1px 2px #0006}.stat-item.total:before{opacity:.4;background:linear-gradient(90deg,#0000,#60a5fa,#0000)}.stat-item.total:hover{box-shadow:0 8px 25px #60a5fa1a}.stat-item.correct span{color:var(--correct);text-shadow:0 1px 2px #0006}.stat-item.correct:before{background:linear-gradient(90deg, transparent, var(--correct), transparent);opacity:.4}.stat-item.correct:hover{box-shadow:0 8px 25px #10b9811a}.stat-item.incorrect span{color:var(--incorrect);text-shadow:0 1px 2px #0006}.stat-item.incorrect:before{background:linear-gradient(90deg, transparent, var(--incorrect), transparent);opacity:.4}.stat-item.incorrect:hover{box-shadow:0 8px 25px #ef44441a}.action-row{flex-wrap:wrap;justify-content:center;gap:12px;margin-bottom:40px;display:flex}.reset-btn{color:var(--text-secondary);cursor:pointer;-webkit-backdrop-filter:blur(12px);background:linear-gradient(145deg,#1e293b66 0%,#0f172a99 100%);border:1px solid #ffffff0d;border-radius:50px;flex:1;justify-content:center;align-items:center;gap:8px;min-width:160px;min-height:44px;padding:10px 22px;font-family:inherit;font-size:.85rem;font-weight:600;transition:all .3s cubic-bezier(.175,.885,.32,1.275);display:flex;box-shadow:0 4px 15px #0003}.reset-btn:hover{color:var(--text-primary);background:linear-gradient(145deg,#1e293b99 0%,#0f172acc 100%);border-color:#ef444466;transform:translateY(-2px);box-shadow:0 8px 25px #ef444426}.quiz-mode-btn{color:#fff;cursor:pointer;text-shadow:0 1px 2px #0003;background:linear-gradient(135deg,#3b82f6 0%,#2563eb 100%);border:1px solid #ffffff1a;border-radius:50px;flex:1;justify-content:center;align-items:center;gap:8px;min-width:160px;min-height:44px;padding:10px 22px;font-family:inherit;font-size:.85rem;font-weight:600;transition:all .3s cubic-bezier(.175,.885,.32,1.275);display:flex;box-shadow:0 4px 20px #2563eb66,inset 0 1px 1px #fff3}.quiz-mode-btn:hover{transform:translateY(-2px);box-shadow:0 8px 30px #2563eb99,inset 0 1px 1px #ffffff4d}.export-pdf-btn{color:#fff;cursor:pointer;text-shadow:0 1px 2px #0003;background:linear-gradient(135deg,#10b981 0%,#059669 100%);border:1px solid #ffffff1a;border-radius:50px;flex:1;justify-content:center;align-items:center;gap:8px;min-width:160px;min-height:44px;padding:10px 22px;font-family:inherit;font-size:.85rem;font-weight:600;transition:all .3s cubic-bezier(.175,.885,.32,1.275);display:flex;box-shadow:0 4px 20px #10b9814d,inset 0 1px 1px #fff3}.export-pdf-btn:hover{transform:translateY(-2px);box-shadow:0 8px 30px #10b98180,inset 0 1px 1px #ffffff4d}.lectures-grid{grid-template-columns:repeat(auto-fill,minmax(min(100%,270px),1fr));gap:18px;display:grid}.section-title{font-family:var(--font-title);color:var(--text-primary);letter-spacing:.5px;border-bottom:1px solid #ffffff0d;align-items:center;gap:12px;margin-bottom:24px;padding-bottom:12px;font-size:1.6rem;font-weight:800;display:flex;position:relative}.section-title:before{content:"";background:linear-gradient(#60a5fa 0%,#3b82f6 100%);border-radius:4px;width:6px;height:24px;box-shadow:0 0 10px #60a5fa80}.lecture-card{cursor:pointer;-webkit-backdrop-filter:blur(10px);background:#ffffff0d;border:1px solid #ffffff14;border-top-color:#ffffff26;border-radius:24px;flex-direction:column;padding:26px;transition:all .4s cubic-bezier(.175,.885,.32,1.275);display:flex;position:relative;overflow:hidden;box-shadow:0 10px 30px #00000040,inset 0 0 0 1px #ffffff08}.lecture-card:before{content:"";opacity:0;pointer-events:none;background:linear-gradient(135deg,#60a5fa14,#0000 60%);border-radius:24px;transition:opacity .4s;position:absolute;inset:0}.lecture-card:hover:before{opacity:1}.lecture-card:hover{border-color:#60a5fa66;transform:translateY(-6px)scale(1.02);box-shadow:0 20px 40px #00000080,0 0 0 1px #60a5fa4d}.lecture-title{color:var(--text-primary);font-size:1rem;font-weight:600;line-height:1.4}.lecture-title-row{justify-content:space-between;align-items:center;gap:10px;margin-bottom:18px;display:flex}.lecture-new-chip{letter-spacing:.3px;color:#22d3ee;white-space:nowrap;background:#22d3ee1a;border:1px solid #22d3ee40;border-radius:50px;flex-shrink:0;align-items:center;margin-top:2px;padding:3px 9px;font-size:.72rem;font-weight:700;transition:background .2s,border-color .2s;animation:.3s ease-out both chipFadeIn;display:inline-flex}.lecture-card:hover .lecture-new-chip{background:#22d3ee2e;border-color:#22d3ee73}@keyframes chipFadeIn{0%{opacity:0;transform:scale(.85)}to{opacity:1;transform:scale(1)}}.lecture-stats{color:var(--text-muted);border-top:1px solid #ffffff0d;flex-direction:column;gap:10px;margin-top:auto;padding-top:18px;font-size:.85rem;display:flex}.lecture-stats .mark{letter-spacing:.3px;background:#ffffff08;border:1px solid #ffffff0d;border-radius:10px;align-items:center;gap:10px;padding:8px 12px;font-weight:600;transition:all .3s;display:flex}.lecture-card:hover .lecture-stats .mark{background:#ffffff0f;border-color:#ffffff1a;transform:translate(4px)}.lecture-stats .mark svg{filter:drop-shadow(0 2px 4px #00000080);width:16px;height:16px}.lecture-stats .mark.correct{color:var(--correct)}.lecture-stats .mark.correct svg{fill:var(--correct)}.lecture-stats .mark.wrong{color:var(--incorrect)}.lecture-stats .mark.wrong svg{fill:var(--incorrect)}.lecture-stats .mark.answered{color:#60a5fa}.lecture-stats .mark.answered svg{fill:#60a5fa}.lecture-header{-webkit-backdrop-filter:blur(20px);z-index:100;border-bottom:1px solid var(--border);background:#020617d9;margin:-40px -24px 32px;padding:16px 24px;transition:transform .3s;position:sticky;top:0}.nav-top{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:10px;margin-bottom:14px;display:flex}.nav-top-left{flex-wrap:wrap;align-items:center;gap:14px;display:flex}.back-btn{color:var(--text-primary);cursor:pointer;-webkit-backdrop-filter:blur(12px);background:#ffffff0a;border:1px solid #ffffff1a;border-radius:50px;align-items:center;gap:6px;padding:8px 18px;font-family:inherit;font-size:.88rem;font-weight:600;transition:all .25s;display:flex;box-shadow:0 4px 15px #0000001a}.back-btn:hover{background:var(--card-bg-hover);border-color:var(--border-hover);transform:translateY(-1px)}.back-btn svg{fill:currentColor;width:16px;height:16px}.lecture-view-title{font-family:var(--font-title);color:var(--text-primary);background:var(--gradient-text);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;font-size:1.05rem;font-weight:800}.filter-nav{scrollbar-width:none;flex-wrap:nowrap;gap:8px;padding-bottom:4px;display:flex;overflow-x:auto}.filter-nav::-webkit-scrollbar{display:none}.filter-btn{color:var(--text-secondary);cursor:pointer;white-space:nowrap;-webkit-backdrop-filter:blur(8px);background:#ffffff08;border:1px solid #ffffff0f;border-radius:50px;padding:6px 16px;font-family:inherit;font-size:.82rem;font-weight:600;transition:all .2s}.filter-btn:hover{border-color:var(--border-hover);color:#60a5fa}.filter-btn.active{color:#fff;-webkit-backdrop-filter:blur(12px);background:linear-gradient(135deg,#3b82f666 0%,#2563eb80 100%);border:1px solid #60a5fa66;box-shadow:0 4px 15px #2563eb33}.questions-list{flex-direction:column;gap:20px;padding-bottom:50px;display:flex}.question-card{background:var(--card-bg);border:1px solid var(--border);-webkit-backdrop-filter:blur(10px);border-radius:20px;padding:24px;transition:border-color .3s}.question-card:hover{border-color:#ffffff1f}.q-header{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:8px;margin-bottom:14px;display:flex}.q-number{font-family:var(--font-title);color:var(--text-muted);text-transform:uppercase;letter-spacing:.8px;font-size:.8rem;font-weight:400}.q-status{letter-spacing:.3px;border-radius:50px;padding:4px 12px;font-size:.75rem;font-weight:600}.q-status.correct{background:var(--correct-bg);color:var(--correct);border:1px solid var(--correct-border)}.q-status.wrong{background:var(--incorrect-bg);color:var(--incorrect);border:1px solid var(--incorrect-border)}.q-status.unanswered{color:var(--text-muted);border:1px solid var(--border);background:#ffffff0a}.q-text{color:var(--text-primary);margin-bottom:18px;font-size:1rem;font-weight:500;line-height:1.65}.options-grid{flex-direction:column;gap:10px;display:flex}.option-btn{border:1px solid var(--border);text-align:left;color:var(--text-primary);cursor:pointer;-webkit-backdrop-filter:blur(12px);background:#ffffff0d;border-radius:14px;justify-content:space-between;align-items:center;width:100%;padding:13px 18px;font-family:inherit;font-size:.93rem;transition:all .2s;display:flex}.option-btn:hover:not(:disabled){background:#ffffff12;border-color:#60a5fa4d;transform:translate(2px)}.option-btn.actual-correct{background:var(--correct-bg);border-color:var(--correct-border);color:#6ee7b7;box-shadow:0 0 12px #10b9811f}.option-btn.selected-correct{background:var(--correct-bg);border-color:var(--correct-border);color:#6ee7b7}.option-btn.selected-wrong{background:var(--incorrect-bg);border-color:var(--incorrect-border);color:#fca5a5}.actual-correct .icon-svg,.selected-correct .icon-svg{fill:var(--correct)}.selected-wrong .icon-svg{fill:var(--incorrect)}.option-btn:disabled{cursor:default}.icon-svg{vertical-align:middle;fill:currentColor;flex-shrink:0;width:18px;height:18px;display:inline-block}.explanation-box{-webkit-backdrop-filter:blur(24px);background:linear-gradient(165deg,#1e3a8a26 0%,#0f172a66 100%) 0 0/200% 200%;border:1px solid #3b82f633;border-radius:20px;margin-top:20px;padding:24px;animation:.5s cubic-bezier(.175,.885,.32,1.275) magicAppear,8s infinite backgroundShift;position:relative;overflow:hidden;box-shadow:0 15px 35px #0000004d,inset 0 0 20px #2563eb0d}@keyframes backgroundShift{0%{background-position:0%}50%{background-position:100%}to{background-position:0%}}.explanation-box:before{content:"";background:linear-gradient(#3b82f6,#06b6d4);width:4px;height:100%;position:absolute;top:0;left:0;box-shadow:0 0 15px #3b82f699}@keyframes magicAppear{0%{opacity:0;transform:translateY(15px)scale(.98)}to{opacity:1;transform:translateY(0)scale(1)}}.explanation-header{justify-content:space-between;align-items:center;margin-bottom:16px;display:flex}.explanation-header>div{color:#60a5fa;text-transform:uppercase;letter-spacing:1.5px;text-shadow:0 0 10px #60a5fa4d;align-items:center;gap:10px;font-size:.85rem;font-weight:800;display:flex}.explanation-header .hide-btn{color:var(--text-muted);cursor:pointer;text-transform:uppercase;letter-spacing:.5px;background:#ffffff08;border:1px solid #ffffff14;border-radius:50px;padding:5px 14px;font-size:.7rem;font-weight:700;transition:all .3s}.explanation-header .hide-btn:hover{color:var(--text-primary);background:#ffffff14;border-color:#fff3}.explanation-content{color:#cbd5e1;white-space:pre-line;font-size:.98rem;font-weight:400;line-height:1.7}.show-explanation-btn{color:#93c5fd;cursor:pointer;background:#3b82f614;border:1px solid #3b82f640;border-radius:14px;align-items:center;gap:10px;width:fit-content;margin-top:18px;padding:11px 22px;font-size:.9rem;font-weight:700;transition:all .4s cubic-bezier(.175,.885,.32,1.275);display:flex;box-shadow:0 4px 15px #0000001a}.show-explanation-btn:hover{color:#fff;background:#3b82f626;border-color:#3b82f666;transform:translateY(-2px);box-shadow:0 8px 25px #2563eb33}button .icon-svg:first-child{margin-right:2px}button .icon-svg:last-child{margin-left:6px}h2 .icon-svg{width:24px;height:24px;margin-right:5px}.q-status .icon-svg{width:14px;height:14px;margin-right:4px}.score-title .icon-svg{vertical-align:bottom;width:32px;height:32px;margin-right:12px}.empty-state{text-align:center;color:var(--text-muted);padding:60px 40px;font-size:.95rem}.matching-options-key{border:1px solid var(--border);background:#ffffff05;border-radius:14px;margin-bottom:14px;padding:14px 18px}.matching-options-key .key-heading{text-transform:uppercase;letter-spacing:1px;color:var(--text-muted);margin-bottom:10px;font-size:.72rem;font-weight:700}.matching-options-key .opt-item{gap:10px;padding:4px 0;font-size:.9rem;display:flex}.matching-options-key .opt-letter{color:#60a5fa;min-width:22px;font-weight:700}.matching-rows-table{border-collapse:collapse;width:100%;margin-bottom:14px}.matching-rows-table td{border:1px solid var(--border);vertical-align:middle;padding:10px 12px}.matching-rows-table tr:first-child td{text-transform:uppercase;letter-spacing:.8px;color:var(--text-muted);background:#ffffff08;font-size:.72rem;font-weight:700}.matching-rows-table tr:not(:first-child):nth-child(2n) td{background:#00000026}.matching-row-label{color:var(--text-primary);font-size:.9rem;font-weight:500}.matching-row-label .row-num{color:var(--text-muted);margin-right:8px;font-weight:700}.matching-select{border:1px solid var(--border);color:var(--text-primary);background:var(--card-bg);cursor:pointer;border-radius:10px;min-width:90px;padding:7px 12px;font-family:inherit;font-size:.9rem;transition:border-color .2s}.matching-select:focus{border-color:#2563eb;outline:none;box-shadow:0 0 0 3px #2563eb33}.matching-select:disabled{cursor:default;background:#ffffff08}.match-correct{background:var(--correct-bg)!important}.match-wrong{background:var(--incorrect-bg)!important}.match-correct .matching-select{border-color:var(--correct-border);color:var(--correct);background:var(--correct-bg)}.match-wrong .matching-select{border-color:var(--incorrect-border);color:var(--incorrect);background:var(--incorrect-bg)}.matching-confirm-btn{background:var(--gradient);color:#fff;cursor:pointer;border:none;border-radius:50px;width:100%;padding:12px 24px;font-family:inherit;font-size:.9rem;font-weight:600;transition:all .25s;box-shadow:0 4px 16px #2563eb4d}.matching-confirm-btn:hover:not(:disabled){opacity:.9;transform:translateY(-1px);box-shadow:0 6px 22px #2563eb73}.matching-confirm-btn:disabled{opacity:.35;cursor:not-allowed;box-shadow:none}.matching-confirm-btn.done{box-shadow:none;cursor:default;background:#ffffff14}.blank-input-wrap{flex-wrap:wrap;gap:10px;margin-top:12px;display:flex}.blank-input{border:1px solid var(--border);min-width:160px;color:var(--text-primary);background:#ffffff0a;border-radius:12px;flex:1;padding:12px 16px;font-family:inherit;font-size:.95rem;transition:all .2s}.blank-input:focus{border-color:#2563eb;outline:none;box-shadow:0 0 0 3px #2563eb33}.blank-input:disabled{background:#ffffff08}.blank-confirm-btn{background:var(--gradient);color:#fff;cursor:pointer;white-space:nowrap;border:none;border-radius:50px;padding:12px 22px;font-family:inherit;font-size:.9rem;font-weight:600;transition:all .25s;box-shadow:0 4px 16px #2563eb4d}.blank-confirm-btn:hover:not(:disabled){opacity:.9;transform:translateY(-1px)}.blank-confirm-btn:disabled{opacity:.35;cursor:not-allowed;box-shadow:none}.blank-result{border-radius:14px;margin-top:14px;padding:14px 18px;display:none}.blank-result.show{display:block}.blank-result .result-label{text-transform:uppercase;letter-spacing:.8px;margin-bottom:5px;font-size:.72rem;font-weight:700}.blank-result .result-answer{font-size:.95rem;font-weight:600}.blank-result.correct-result{background:var(--correct-bg);border:1px solid var(--correct-border)}.blank-result.correct-result .result-label{color:var(--correct)}.blank-result.correct-result .result-answer{color:#6ee7b7}.blank-result.show-result{background:var(--quiz-bg);border:1px solid var(--quiz-border)}.blank-result.show-result .result-label{color:#a78bfa}.blank-result.show-result .result-answer{color:#c4b5fd}.quiz-setup-header{text-align:center;margin-bottom:32px}.quiz-setup-header h2{font-family:var(--font-title);letter-spacing:-.5px;background:var(--gradient-text);-webkit-text-fill-color:transparent;filter:drop-shadow(0 0 12px #2563eb4d);-webkit-background-clip:text;background-clip:text;justify-content:center;align-items:center;gap:8px;margin-bottom:10px;font-size:2rem;font-weight:400;display:flex}@media (max-width:600px){.quiz-setup-header h2{gap:6px;font-size:2rem}}.quiz-setup-header p{color:var(--text-secondary);font-size:.95rem}.quiz-select-controls{flex-wrap:wrap;gap:10px;margin-bottom:18px;display:flex}.select-all-btn,.select-none-btn{color:var(--text-secondary);cursor:pointer;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);background:linear-gradient(145deg,#1e293b66 0%,#0f172a99 100%);border:1px solid #ffffff0d;border-radius:50px;padding:9px 20px;font-family:inherit;font-size:.85rem;font-weight:600;transition:all .3s cubic-bezier(.175,.885,.32,1.275)}.select-all-btn:hover,.select-none-btn:hover{color:var(--text-primary);background:linear-gradient(145deg,#1e293b99 0%,#0f172acc 100%);border-color:#60a5fa66;transform:translateY(-2px);box-shadow:0 4px 15px #60a5fa26}.quiz-setup-section{border:1px solid var(--border);background:#ffffff05;border-radius:20px;margin-bottom:24px;padding:24px}.section-subtitle{color:var(--text-primary);letter-spacing:.3px;margin-bottom:16px;font-size:1.1rem;font-weight:700}.select-section-btn{border:1px solid var(--border);color:var(--text-secondary);cursor:pointer;background:#ffffff0d;border-radius:10px;padding:6px 14px;font-size:.8rem;font-weight:600;transition:all .2s}.select-section-btn:hover{color:var(--text-primary);border-color:var(--border-hover);background:#ffffff1a}.lecture-checklist{scrollbar-width:thin;scrollbar-color:var(--border) transparent;flex-direction:column;gap:12px;max-height:340px;margin-bottom:28px;padding-right:4px;display:flex;overflow-y:auto}.lecture-checklist::-webkit-scrollbar{width:4px}.lecture-checklist::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px}.lecture-check-item{cursor:pointer;color:var(--text-secondary);background:linear-gradient(145deg,#ffffff05 0%,#0000 100%);border:1px solid #ffffff0a;border-radius:14px;align-items:center;gap:12px;padding:14px 18px;font-size:.95rem;font-weight:500;transition:all .3s cubic-bezier(.175,.885,.32,1.275);display:flex;position:relative;overflow:hidden}.lecture-check-item:hover{color:var(--text-primary);background:linear-gradient(145deg,#ffffff0d 0%,#0000 100%);border-color:#60a5fa4d;transform:translate(2px);box-shadow:0 4px 12px #0003}.lecture-check-item.selected{color:#bfdbfe;text-shadow:0 1px 2px #00000080;background:linear-gradient(90deg,#2563eb26 0%,#0000 100%);border-color:#2563eb66 #2563eb66 #2563eb66 #3b82f6;border-left-style:solid;border-left-width:3px;box-shadow:inset 0 0 10px #2563eb1a}.lecture-check-item input[type=checkbox]{cursor:pointer;accent-color:#2563eb;flex-shrink:0;width:16px;height:16px}.quiz-count-row{color:var(--text-secondary);flex-wrap:wrap;align-items:center;gap:14px;margin-bottom:28px;font-size:.9rem;font-weight:500;display:flex}.count-btns{gap:8px;display:flex}.count-btn{color:var(--text-secondary);cursor:pointer;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);background:linear-gradient(145deg,#1e293b66 0%,#0f172a99 100%);border:1px solid #ffffff0f;border-radius:50px;padding:8px 20px;font-family:inherit;font-size:.95rem;font-weight:600;transition:all .3s cubic-bezier(.175,.885,.32,1.275)}.count-btn.active{color:#fff;text-shadow:0 1px 2px #0003;background:linear-gradient(135deg,#3b82f6 0%,#2563eb 100%);border-color:#fff3;transform:scale(1.05);box-shadow:0 4px 15px #2563eb80,inset 0 1px 1px #fff3}.count-btn:hover:not(.active){color:#93c5fd;border-color:#60a5fa66;transform:translateY(-2px);box-shadow:0 4px 12px #60a5fa26}.start-quiz-btn{color:#fff;cursor:pointer;letter-spacing:.5px;text-shadow:0 1px 3px #0000004d;background:linear-gradient(135deg,#06b6d4 0%,#3b82f6 100%);border:1px solid #ffffff1a;border-radius:50px;width:100%;padding:13px 28px;font-family:inherit;font-size:1rem;font-weight:700;transition:all .4s cubic-bezier(.175,.885,.32,1.275);display:block;position:relative;overflow:hidden;box-shadow:0 8px 30px #2563eb66,inset 0 1px 2px #ffffff4d}.start-quiz-btn:after{content:"";pointer-events:none;background:linear-gradient(#ffffff1a,#0000);border-radius:50px;position:absolute;inset:0}.start-quiz-btn:hover{filter:brightness(1.1);transform:translateY(-4px)scale(1.02);box-shadow:0 12px 40px #2563eb99,inset 0 1px 2px #fff6}#quizProgressWrap{margin-bottom:28px}.quiz-progress-bar-wrap{background:#ffffff0f;border-radius:2px;width:100%;height:4px;margin-bottom:10px;overflow:hidden}.quiz-progress-bar{background:var(--gradient);border-radius:2px;height:100%;transition:width .4s;box-shadow:0 0 10px #2563eb80}.quiz-meta{color:var(--text-muted);justify-content:space-between;font-size:.82rem;font-weight:500;display:flex}.quiz-question-card{background:var(--card-bg);border:1px solid var(--border);-webkit-backdrop-filter:blur(10px);border-radius:20px;margin-bottom:16px;padding:26px}.quiz-q-text{color:var(--text-primary);margin-bottom:20px;font-size:1.05rem;font-weight:500;line-height:1.65}.quiz-options{flex-direction:column;gap:10px;display:flex}.quiz-option-btn{border:1px solid var(--border);text-align:left;color:var(--text-primary);cursor:pointer;-webkit-backdrop-filter:blur(12px);background:#ffffff0d;border-radius:14px;justify-content:space-between;align-items:center;width:100%;padding:13px 18px;font-family:inherit;font-size:.93rem;transition:all .2s;display:flex}.quiz-option-btn:hover:not(:disabled){background:#ffffff12;border-color:#60a5fa4d;transform:translate(2px)}.quiz-option-btn.q-correct{background:var(--correct-bg);border-color:var(--correct-border);color:#6ee7b7;box-shadow:0 0 12px #10b9811f}.quiz-option-btn.q-wrong{background:var(--incorrect-bg);border-color:var(--incorrect-border);color:#fca5a5}.quiz-option-btn:disabled{cursor:default}.quiz-next-btn{background:var(--gradient);color:#fff;cursor:pointer;border:none;border-radius:50px;width:100%;padding:14px 32px;font-family:inherit;font-size:.95rem;font-weight:700;transition:all .25s;box-shadow:0 5px 20px #2563eb59}.quiz-next-btn:hover{opacity:.9;transform:translateY(-2px);box-shadow:0 8px 28px #2563eb80}.score-screen{text-align:center;padding:60px 30px}.score-circle{border:3px solid;border-radius:50%;flex-direction:column;justify-content:center;align-items:center;width:140px;height:140px;margin:0 auto 28px;display:flex;position:relative}.score-circle:before{content:"";opacity:.2;filter:blur(12px);border-radius:50%;position:absolute;inset:-8px}.score-circle.great{border-color:var(--correct);background:var(--correct-bg);box-shadow:0 0 30px #10b98133}.score-circle.ok{background:#f59e0b1f;border-color:#f59e0b;box-shadow:0 0 30px #f59e0b33}.score-circle.poor{border-color:var(--incorrect);background:var(--incorrect-bg);box-shadow:0 0 30px #ef444433}.score-num{font-family:var(--font-title);letter-spacing:-1px;font-size:2rem;font-weight:400;line-height:1;display:block}.score-label{color:var(--text-muted);text-transform:uppercase;letter-spacing:1px;font-size:.8rem;font-weight:600}.score-title{font-family:var(--font-title);color:var(--text-primary);margin-bottom:10px;font-size:1.4rem;font-weight:400}.score-sub{color:var(--text-secondary);margin-bottom:32px;font-size:.95rem}.score-btns{flex-wrap:wrap;justify-content:center;gap:12px;display:flex}.score-back-btn{background:var(--card-bg);border:1px solid var(--border);color:var(--text-primary);cursor:pointer;border-radius:50px;padding:12px 24px;font-family:inherit;font-size:.9rem;font-weight:600;transition:all .2s}.score-back-btn:hover{background:var(--card-bg-hover);border-color:var(--border-hover);transform:translateY(-1px)}.score-retry-btn{background:var(--gradient);color:#fff;cursor:pointer;border:none;border-radius:50px;padding:12px 28px;font-family:inherit;font-size:.9rem;font-weight:700;transition:all .25s;box-shadow:0 4px 16px #2563eb59}.score-retry-btn:hover{opacity:.9;transform:translateY(-2px);box-shadow:0 6px 24px #2563eb80}.modal-overlay{-webkit-backdrop-filter:blur(8px);z-index:9999;background:#00000080;justify-content:center;align-items:center;width:100%;height:100%;padding:20px;animation:.25s ease-out modalFadeIn;display:flex;position:fixed;top:0;left:0}.modal-content{-webkit-backdrop-filter:blur(20px);background:#1e293bb3;border:1px solid #ffffff1a;border-radius:28px;width:100%;max-width:440px;padding:32px;animation:.35s cubic-bezier(.34,1.56,.64,1) modalScaleUp;box-shadow:0 25px 50px -12px #0009}.modal-content h3{font-family:var(--font-title);color:var(--text-primary);margin-top:0;margin-bottom:12px;font-size:1.35rem;font-weight:400}.modal-content p{color:var(--text-secondary);margin-bottom:28px;font-size:.95rem;line-height:1.6}.modal-actions{justify-content:flex-end;gap:12px;display:flex}.modal-btn{cursor:pointer;border-radius:50px;padding:12px 22px;font-family:inherit;font-size:.9rem;font-weight:600;transition:all .2s}.modal-btn.cancel{border:1px solid var(--border);color:var(--text-primary);background:#ffffff0d}.modal-btn.cancel:hover{border-color:var(--border-hover);background:#ffffff1a}.modal-btn.confirm{background:var(--incorrect);color:#fff;border:none}.modal-btn.confirm:hover{opacity:.9;transform:translateY(-1px)}@keyframes modalFadeIn{0%{opacity:0}to{opacity:1}}@keyframes modalScaleUp{0%{opacity:0;transform:scale(.95)}to{opacity:1;transform:scale(1)}}@keyframes iconPop{0%{opacity:0;transform:scale(.5)}50%{transform:scale(1.3)}to{opacity:1;transform:scale(1)}}@keyframes subtleCelebrate{0%{transform:scale(1);box-shadow:0 0 #10b98100}50%{transform:scale(1.015);box-shadow:0 0 18px #10b98140}to{transform:scale(1);box-shadow:0 0 6px #10b9811a}}@keyframes subtleShake{0%,to{transform:translate(0)}20%,60%{transform:translate(-3px)}40%,80%{transform:translate(3px)}}.option-btn.actual-correct,.quiz-option-btn.q-correct{animation:.45s cubic-bezier(.175,.885,.32,1.275) forwards subtleCelebrate}.option-btn.selected-wrong,.quiz-option-btn.q-wrong{animation:.4s ease-in-out forwards subtleShake}.option-btn.actual-correct .icon-svg,.option-btn.selected-wrong .icon-svg,.quiz-option-btn.q-correct .icon-svg,.quiz-option-btn.q-wrong .icon-svg{animation:.4s cubic-bezier(.175,.885,.32,1.275) forwards iconPop}.lecture-section{margin-bottom:48px}.section-title{font-family:var(--font-title);border-bottom:2px solid var(--border);color:var(--text-primary);letter-spacing:.5px;align-items:center;gap:12px;margin-bottom:24px;padding-bottom:12px;font-size:1.5rem;font-weight:400;display:flex}.section-title:before{content:"";background:var(--gradient);border-radius:4px;width:6px;height:24px}.quiz-setup-section{-webkit-backdrop-filter:blur(10px);background:linear-gradient(#ffffff08 0%,#ffffff03 100%);border:1px solid #ffffff0f;border-top-color:#ffffff1a;border-radius:20px;margin-bottom:24px;padding:24px;box-shadow:0 4px 20px #00000026}.section-subtitle{color:var(--text-primary);letter-spacing:.5px;text-shadow:0 1px 3px #00000080;margin-bottom:18px;font-size:1.15rem;font-weight:700}.section-select-controls{gap:12px;margin-bottom:18px;display:flex}.select-section-btn{color:var(--text-secondary);cursor:pointer;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);background:linear-gradient(145deg,#1e293b66 0%,#0f172a99 100%);border:1px solid #ffffff0d;border-radius:12px;padding:8px 16px;font-size:.8rem;font-weight:600;transition:all .3s cubic-bezier(.175,.885,.32,1.275)}.select-section-btn:hover{color:var(--text-primary);background:linear-gradient(145deg,#1e293b99 0%,#0f172acc 100%);border-color:#60a5fa66;transform:translateY(-2px);box-shadow:0 4px 15px #60a5fa26}.section-lectures{flex-direction:column;gap:8px;display:flex}@media (max-width:600px){.container{padding:16px 12px}header{margin-bottom:32px}header h1{font-size:1.7rem;line-height:1.2}.subject-menu-container{padding-top:32px}.subject-menu-hero{margin-bottom:24px}.subject-menu-title{margin-bottom:6px;font-size:1.8rem;line-height:1.2}.subject-hero-logo{object-fit:contain;flex-shrink:0;width:44px;height:44px;margin-bottom:10px}.subject-card{border-radius:20px;gap:6px;padding:24px 20px 20px}.subject-card-icon{margin-bottom:0;font-size:2.6rem}.subject-card-name{font-size:1.15rem}.subject-card-stats{gap:10px;margin-top:2px;padding:6px 14px}.subject-stat-num{font-size:.95rem}.subject-stat-divider{height:20px}.subject-card-cta{margin-top:2px;padding:4px 10px}.lectures-grid{grid-template-columns:1fr}.question-card,.quiz-question-card{padding:18px}.quiz-q-text{font-size:1rem}.stat-item{flex:1;min-width:90px;padding:12px 14px}.global-stats{gap:10px;margin-bottom:24px}.score-screen{padding:40px 20px}.action-row{flex-direction:column;align-items:stretch;gap:12px;width:100%;margin-bottom:32px}.reset-btn,.quiz-mode-btn,.mode-toggle-btn{justify-content:center;width:100%}.mode-toggle-btn,.quiz-mode-btn,.reset-btn{padding:14px 20px;font-size:1rem}select,input,.blank-input,.matching-select{font-size:16px!important}.matching-select{padding:12px 14px}.lecture-header,.quiz-nav-sticky-wrapper{z-index:100;-webkit-backdrop-filter:blur(20px);background:#020617d9;transition:transform .3s;position:sticky;top:0}.lecture-header{margin-top:-16px;margin-left:-12px;margin-right:-12px;padding:12px}.lecture-header.header-hidden,.quiz-nav-sticky-wrapper.header-hidden{transform:translateY(-100%)}.quiz-nav-sticky-wrapper{border-bottom:1px solid var(--border);margin-bottom:20px;padding:16px 0}}.mode-toggle-btn{border:1px solid var(--border);cursor:pointer;-webkit-backdrop-filter:blur(10px);border-radius:50px;flex:1;justify-content:center;align-items:center;gap:8px;min-width:160px;min-height:44px;padding:10px 22px;font-family:inherit;font-size:.85rem;font-weight:600;transition:all .25s;display:flex}.mode-toggle-btn.mode-study{color:var(--correct);-webkit-backdrop-filter:blur(16px);background:#10b98114;border-color:#10b9814d;box-shadow:inset 0 0 10px #10b9810d}.mode-toggle-btn.mode-study:hover{background:#10b9812e;transform:translateY(-1px)}.mode-toggle-btn.mode-exam{color:#f59e0b;-webkit-backdrop-filter:blur(16px);background:#f59e0b14;border-color:#f59e0b4d;box-shadow:inset 0 0 10px #f59e0b0d}.mode-toggle-btn.mode-exam:hover{background:#f59e0b2e;transform:translateY(-1px)}.mode-toggle-btn svg{fill:currentColor;width:16px;height:16px}.quiz-mode-popup{z-index:1000;transform-origin:100% 0;-webkit-backdrop-filter:blur(20px);text-align:left;background:#ffffff14;border:1px solid #ffffff26;border-radius:12px;width:240px;padding:12px 14px;animation:.5s cubic-bezier(.175,.885,.32,1.275) forwards popup-bounce;position:absolute;top:calc(100% + 12px);right:0;box-shadow:0 15px 35px #0006,0 0 0 1px #ffffff08}.quiz-mode-popup .popup-arrow{background:#1e293bf2;border-top:1px solid #60a5fa4d;border-left:1px solid #60a5fa4d;width:10px;height:10px;position:absolute;top:-6px;right:20px;transform:rotate(45deg)}.quiz-mode-popup .popup-content{color:var(--text-secondary);padding-right:16px;font-size:.85rem;line-height:1.4}.quiz-mode-popup .popup-content strong{color:var(--text-primary);margin-bottom:4px;font-size:.9rem;display:block}.quiz-mode-popup .popup-close{color:var(--text-muted);cursor:pointer;background:0 0;border:none;padding:4px;font-size:1rem;line-height:1;transition:color .2s;position:absolute;top:8px;right:8px}.quiz-mode-popup .popup-close:hover{color:var(--text-primary)}@keyframes popup-bounce{0%{opacity:0;transform:scale(.9)translateY(-10px)}to{opacity:1;transform:scale(1)translateY(0)}}.mode-badge-small{border:1px solid;border-radius:50px;align-items:center;gap:5px;padding:5px 12px;font-size:.78rem;font-weight:600;display:flex}.mode-badge-small.mode-study{color:var(--correct);-webkit-backdrop-filter:blur(8px);background:#10b98114;border-color:#10b9814d}.mode-badge-small.mode-exam{color:#f59e0b;-webkit-backdrop-filter:blur(8px);background:#f59e0b14;border-color:#f59e0b4d}.mode-badge-small svg{fill:currentColor;width:13px;height:13px}.show-answers-btn{color:#f59e0b;cursor:pointer;background:#f59e0b1a;border:1px solid #f59e0b66;border-radius:50px;align-items:center;gap:6px;padding:8px 16px;font-family:inherit;font-size:.82rem;font-weight:600;transition:all .25s;display:flex}.show-answers-btn:hover{background:#f59e0b33;transform:translateY(-1px)}.show-answers-btn svg{fill:currentColor;width:15px;height:15px}.answers-shown-badge{color:#f59e0b;opacity:.7;align-items:center;gap:5px;font-size:.78rem;font-weight:600;display:flex}.answers-shown-badge svg{fill:currentColor;width:13px;height:13px}.exam-mode-banner{color:#fbbf24;background:#f59e0b14;border:1px solid #f59e0b40;border-radius:12px;align-items:center;gap:8px;margin-top:12px;padding:9px 16px;font-size:.83rem;font-weight:500;display:flex}.exam-mode-banner svg{fill:currentColor;flex-shrink:0;width:15px;height:15px}.option-btn.q-picked,.quiz-option-btn.q-picked{color:#93c5fd;background:#60a5fa1a;border-color:#60a5fa66}.q-status.answered-hidden{color:#60a5fa;background:#60a5fa1a;border:1px solid #60a5fa4d;border-radius:50px;padding:4px 12px;font-size:.75rem;font-weight:600}.vote-bar-wrap{background:#ffffff0f;border-radius:4px;width:100%;height:4px;margin-top:8px;display:block;position:relative;overflow:visible}.vote-bar{background:linear-gradient(90deg,#2563eb,#06b6d4);border-radius:4px;height:100%;transition:width .6s;position:absolute;top:0;left:0}.vote-label{color:var(--text-muted);white-space:nowrap;align-items:center;gap:3px;font-size:.7rem;font-weight:500;display:flex;position:absolute;top:7px;left:0}.option-btn:has(.vote-bar-wrap){flex-direction:column;align-items:flex-start;padding-bottom:24px}.quiz-mode-selector{-webkit-backdrop-filter:blur(16px);background:linear-gradient(160deg,#1e293b4d 0%,#0f172ab3 100%);border:1px solid #ffffff0d;border-radius:20px;margin-bottom:24px;padding:22px;box-shadow:0 8px 32px #0003}.quiz-mode-label{text-transform:uppercase;letter-spacing:1.5px;color:var(--text-muted);text-shadow:0 1px 2px #00000080;margin-bottom:14px;font-size:.8rem;font-weight:700}.quiz-mode-options{flex-wrap:wrap;gap:14px;display:flex}.quiz-mode-opt{min-width:150px;color:var(--text-secondary);cursor:pointer;background:linear-gradient(145deg,#ffffff05 0%,#0000 100%);border:1px solid #ffffff0f;border-radius:16px;flex-direction:column;flex:1;align-items:center;gap:8px;padding:16px 20px;font-family:inherit;font-size:.95rem;font-weight:600;transition:all .3s cubic-bezier(.175,.885,.32,1.275);display:flex;position:relative;overflow:hidden}.quiz-mode-opt svg{fill:currentColor;width:22px;height:22px;transition:transform .3s}.quiz-mode-opt .mode-desc{color:var(--text-muted);text-align:center;font-size:.75rem;font-weight:500;line-height:1.4;transition:color .3s}.quiz-mode-opt:hover:not(.active){color:var(--text-primary);background:linear-gradient(145deg,#ffffff0d 0%,#0000 100%);border-color:#ffffff26;transform:translateY(-2px);box-shadow:0 8px 20px #0003}.quiz-mode-opt.active{color:#93c5fd;background:linear-gradient(145deg,#2563eb26 0%,#2563eb0d 100%);border-color:#3b82f6;transform:translateY(-2px);box-shadow:0 0 20px #2563eb4d,inset 0 0 10px #2563eb33}.quiz-mode-opt.active svg{filter:drop-shadow(0 0 8px #93c5fd99);transform:scale(1.1)}.quiz-mode-opt.active .mode-desc{color:#bfdbfe}.exam-results-list{border:1px solid var(--border);text-align:left;border-radius:18px;margin:28px 0;overflow:hidden}.exam-results-title{text-transform:uppercase;letter-spacing:1px;color:var(--text-muted);border-bottom:1px solid var(--border);background:#ffffff08;padding:14px 20px;font-size:.85rem;font-weight:700}.exam-result-item{border-bottom:1px solid var(--border);padding:16px 20px;transition:background .2s}.exam-result-item:last-child{border-bottom:none}.exam-result-item.result-correct{border-left:3px solid var(--correct)}.exam-result-item.result-wrong{border-left:3px solid var(--incorrect)}.result-item-header{align-items:center;gap:10px;margin-bottom:6px;display:flex}.result-num{text-transform:uppercase;color:var(--text-muted);letter-spacing:.5px;font-size:.72rem;font-weight:700}.result-badge{border-radius:50px;align-items:center;gap:4px;padding:3px 10px;font-size:.72rem;font-weight:700;display:flex}.result-badge.correct-badge{background:var(--correct-bg);color:var(--correct);border:1px solid var(--correct-border)}.result-badge.wrong-badge{background:var(--incorrect-bg);color:var(--incorrect);border:1px solid var(--incorrect-border)}.result-badge svg{fill:currentColor;width:12px;height:12px}.result-question{color:var(--text-primary);margin-bottom:10px;font-size:.9rem;font-weight:500;line-height:1.5}.result-answers{flex-direction:column;gap:5px;display:flex}.result-row{flex-wrap:wrap;align-items:baseline;gap:8px;font-size:.83rem;display:flex}.result-row-label{color:var(--text-muted);white-space:nowrap;flex-shrink:0;font-weight:600}.result-row-value{font-weight:500}.ans-correct{color:var(--correct)}.ans-wrong{color:var(--incorrect)}.nav-top-right{flex-wrap:wrap;align-items:center;gap:8px;display:flex}.nav-top-right .mode-toggle-btn,.nav-top-right .show-answers-btn{box-sizing:border-box!important;border-radius:50px!important;flex:none!important;justify-content:center!important;align-items:center!important;min-width:140px!important;min-height:40px!important;padding:8px 18px!important;font-size:.85rem!important;font-weight:600!important;display:inline-flex!important}@media (max-width:600px){.quiz-mode-options{flex-direction:column}.exam-result-item{padding:12px 14px}.nav-top{flex-direction:column;align-items:flex-start;gap:12px}.nav-top-left{width:100%}.lecture-view-title{font-size:1.2rem}.nav-top-right{justify-content:space-between;width:100%}.nav-top-right .mode-toggle-btn,.nav-top-right .show-answers-btn{flex:1;justify-content:center;padding:12px 16px}.lecture-checklist{max-height:none;padding-right:0;overflow-y:visible}}.subject-menu-container{max-width:860px;padding-top:60px}.subject-menu-hero{text-align:center;margin-bottom:52px}.subject-hero-logo{object-fit:contain;filter:drop-shadow(0 0 16px #2563eb80);flex-shrink:0;width:52px;height:52px;margin-bottom:18px;animation:3s ease-in-out infinite logoPulse}@keyframes logoPulse{0%,to{filter:drop-shadow(0 0 16px #2563eb80)}50%{filter:drop-shadow(0 0 28px #06b6d4b3)}}.subject-menu-title{font-family:var(--font-title);letter-spacing:-.5px;background:var(--gradient-text);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;margin-bottom:12px;font-size:2.2rem;font-weight:400}@media (max-width:768px){.subject-menu-title{font-size:2.2rem}}.subject-menu-subtitle{color:var(--text-secondary);font-size:1rem}.subjects-grid{grid-template-columns:1fr 1fr;gap:20px;margin-bottom:40px;display:grid}@media (max-width:768px){.subjects-grid{gap:16px}}@media (max-width:560px){.subjects-grid{grid-template-columns:1fr;gap:14px}}.subject-card{text-align:center;color:var(--text-primary);background:var(--card-bg);cursor:pointer;-webkit-backdrop-filter:blur(16px);border:1px solid #ffffff14;border-radius:28px;flex-direction:column;align-items:center;gap:10px;padding:32px 24px 24px;font-family:inherit;transition:all .35s cubic-bezier(.175,.885,.32,1.275);display:flex;position:relative;overflow:hidden;box-shadow:inset 0 1px 1px #ffffff1a}.subject-card:hover{transform:translateY(-6px)scale(1.02)}.subject-card-pathology:hover{border-color:#60a5fa80;box-shadow:0 24px 60px #0006,0 0 0 1px #2563eb4d}.subject-card-microbiology:hover{border-color:#10b98180;box-shadow:0 24px 60px #0006,0 0 0 1px #10b9814d}.subject-card-medicine:hover{border-color:#22d3ee80;box-shadow:0 24px 60px #0006,0 0 0 1px #22d3ee4d}.subject-card-glow{opacity:0;pointer-events:none;border-radius:50%;width:160px;height:160px;transition:opacity .4s;position:absolute;top:-40px;left:50%;transform:translate(-50%)}.subject-glow-blue{background:radial-gradient(circle,#2563eb40 0%,#0000 70%)}.subject-glow-green{background:radial-gradient(circle,#10b98140 0%,#0000 70%)}.subject-glow-purple{background:radial-gradient(circle,#a855f74d 0%,#0000 70%)}.subject-glow-red{background:radial-gradient(circle,#ef444440 0%,#0000 70%)}.subject-glow-medicine{background:radial-gradient(circle,#22d3ee40 0%,#0000 70%)}.subject-card:hover .subject-card-glow{opacity:1}.subject-card-icon{margin-bottom:4px;font-size:3.2rem;line-height:1}.subject-card-name{font-family:var(--font-title);letter-spacing:-.3px;font-size:1.35rem;font-weight:400}.subject-card-stats{border:1px solid var(--border);background:#ffffff0a;border-radius:50px;align-items:center;gap:16px;margin-top:4px;padding:9px 20px;display:flex}.subject-stat-item{flex-direction:column;align-items:center;gap:2px;display:flex}.subject-stat-num{font-family:var(--font-title);color:var(--text-primary);font-size:1.1rem;font-weight:400;line-height:1}.subject-card-pathology .subject-stat-num{color:#60a5fa}.subject-card-microbiology .subject-stat-num{color:#34d399}.subject-card-parasitology .subject-stat-num{color:#a855f7}.subject-card-pharmacology .subject-stat-num{color:#f87171}.subject-card-medicine .subject-stat-num{color:#22d3ee}.subject-stat-label{text-transform:uppercase;letter-spacing:.8px;color:#fff9;font-size:.65rem;font-weight:600}.subject-stat-divider{background:var(--border);width:1px;height:28px}.subject-card-cta{border-radius:50px;margin-top:6px;padding:6px 14px;font-size:.82rem;font-weight:600;transition:all .2s}.subject-card-pathology .subject-card-cta{color:#60a5fa}.subject-card-microbiology .subject-card-cta{color:#34d399}.subject-card-pharmacology .subject-card-cta{color:#f87171}.subject-card-medicine .subject-card-cta{color:#22d3ee}.subject-card:hover .subject-card-cta{background:#ffffff0d}.subject-card:active .subject-card-cta{background:#ffffff1a}.coming-soon-section{text-align:center;padding:20px 0 10px}.coming-soon-heading{text-transform:uppercase;letter-spacing:1.2px;color:var(--text-muted);margin-bottom:14px;font-size:.8rem;font-weight:600}.coming-soon-tags{flex-wrap:wrap;justify-content:center;gap:10px;display:flex}.coming-soon-tag{border:1px solid var(--border);color:var(--text-muted);background:#ffffff08;border-radius:50px;padding:6px 16px;font-size:.8rem;font-weight:500}.subject-context-bar{border-bottom:1px solid var(--border);align-items:center;gap:12px;margin-bottom:24px;padding-bottom:16px;display:flex}.subject-back-btn{background:var(--card-bg);border:1px solid var(--border);color:var(--text-secondary);cursor:pointer;-webkit-backdrop-filter:blur(10px);border-radius:50px;padding:7px 16px;font-family:inherit;font-size:.82rem;font-weight:500;transition:all .2s}.subject-back-btn:hover{background:var(--card-bg-hover);border-color:var(--border-hover);color:var(--text-primary)}.subject-context-name{font-family:var(--font-title);color:var(--text-muted);text-transform:uppercase;letter-spacing:.8px;font-size:.82rem;font-weight:400}.practical-image-container{border:1px solid var(--border);background:#0003;border-radius:12px;max-width:100%;margin:16px 0;position:relative;overflow:hidden}.practical-image{object-fit:contain;width:100%;height:auto;max-height:400px;display:block}.practical-image-caption{color:var(--text-secondary);background:var(--card-bg);border-top:1px solid var(--border);text-align:center;padding:8px 12px;font-size:.85rem;font-style:italic}.practical-image-section{border:1px solid var(--border);background:#ffffff05;border-radius:20px;transition:border-color .3s;position:relative;overflow:hidden}.practical-image-section-header{padding:20px 20px 0}.practical-image-section-header .practical-image-container{border-radius:12px;margin:0;overflow:hidden}.practical-image-section-header .practical-image{max-height:480px}.practical-image-section-questions{flex-direction:column;gap:12px;padding:16px 20px 20px;display:flex}.practical-image-section-questions .question-card{background:#ffffff08;border:1px solid #ffffff0f;border-radius:14px;padding:18px}@media (max-width:600px){.practical-image-section-header{padding:12px 12px 0}.practical-image-section-questions{gap:10px;padding:12px 12px 14px}.practical-image-section-questions .question-card{padding:14px}}.image-lightbox{-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);z-index:9999;cursor:zoom-out;background:#0009;flex-direction:column;justify-content:center;align-items:center;width:100vw;height:100vh;padding:20px;animation:.3s fadeIn;display:flex;position:fixed;top:0;left:0}.lightbox-content{flex-direction:column;align-items:center;gap:15px;max-width:95%;max-height:85%;display:flex;position:relative}.lightbox-image{object-fit:contain;border:1px solid #ffffff1a;border-radius:12px;max-width:100%;max-height:100%;animation:.3s cubic-bezier(.34,1.56,.64,1) scaleIn;box-shadow:0 20px 50px #00000080}.lightbox-caption{color:#fff;text-align:center;-webkit-backdrop-filter:blur(5px);backdrop-filter:blur(5px);background:#ffffff1a;border:1px solid #ffffff1a;border-radius:30px;padding:10px 20px;font-size:1.1rem}.lightbox-close{color:#000;cursor:pointer;background:#fff;border:none;border-radius:50%;justify-content:center;align-items:center;width:36px;height:36px;font-size:1.2rem;font-weight:700;transition:transform .2s;display:flex;position:absolute;top:-50px;right:0}.lightbox-close:hover{transform:scale(1.1)}.practical-image-container img{cursor:zoom-in;transition:opacity .2s}.practical-image-container img:hover{opacity:.9}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes scaleIn{0%{opacity:0;transform:scale(.9)}to{opacity:1;transform:scale(1)}}.course-mode-toggle{-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);isolation:isolate;background:#ffffff05;border:1px solid #ffffff0d;border-radius:20px;width:fit-content;min-width:360px;margin:32px auto 0;padding:4px;display:flex;position:relative;box-shadow:inset 0 2px 5px #0000004d}.course-mode-toggle:before{content:"";background:var(--gradient);z-index:-1;border:1px solid #ffffff1a;border-radius:16px;width:calc(50% - 8px);height:calc(100% - 8px);transition:transform .6s cubic-bezier(.16,1,.3,1);position:absolute;top:4px;left:4px;box-shadow:0 4px 15px #0006,0 0 15px #2563eb33}.course-mode-toggle.mode-practical:before{transform:translate(calc(100% + 8px))}.mode-btn{color:var(--text-secondary);cursor:pointer;letter-spacing:.6px;text-transform:uppercase;z-index:1;opacity:.6;white-space:nowrap;-webkit-font-smoothing:antialiased;backface-visibility:hidden;will-change:transform, color, opacity, text-shadow;background:0 0;border:none;flex:1;justify-content:center;align-items:center;gap:8px;padding:12px 20px;font-size:.82rem;font-weight:600;transition:all .4s cubic-bezier(.16,1,.3,1);display:flex;position:relative}.mode-btn.active{color:#fff;opacity:1;text-shadow:0 0 15px #ffffff80,0 0 5px #ffffff4d;transform:translateY(-1px)}.mode-btn:hover:not(.active){color:var(--text-primary);opacity:.9;transform:translateY(-.5px)}.mode-btn:active{transform:translateY(0)scale(.97)}@keyframes subjectCardEnter{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.subjects-grid-transition{animation:.22s ease-out both subjectCardEnter;display:grid}.subject-card{transition:transform .2s,box-shadow .2s}.subject-stat-num{transition:transform .3s cubic-bezier(.34,1.56,.64,1),opacity .3s;display:inline-block}.subject-card:active{transform:scale(.98)}.pulse-badge{cursor:pointer;z-index:10;background:linear-gradient(135deg,#ff5e5e 0%,#dc2626 100%);border-radius:50%;justify-content:center;align-items:center;width:14px;height:14px;transition:transform .3s cubic-bezier(.34,1.56,.64,1),opacity .2s;display:flex;position:absolute;top:-5px;right:-5px;box-shadow:0 0 14px #dc2626cc,inset 0 2px 4px #fff6}.pulse-badge:hover{opacity:.9;transform:scale(1.15)}.pulse-badge .ping-layer{pointer-events:none;background:radial-gradient(circle,#ff3c3c66 0%,#0000 70%);border:1.5px solid #ff6464cc;border-radius:50%;animation:2.5s cubic-bezier(.16,1,.3,1) infinite smooth-ping;position:absolute;inset:-4px}.pulse-badge .ping-layer:nth-child(2){opacity:.5;border-color:#ff969699;animation-delay:.8s}.pulse-badge .dot-layer{pointer-events:none;background:linear-gradient(135deg,#fff 0%,#ff7979 100%);border-radius:50%;width:6px;height:6px;animation:2s ease-in-out infinite core-shimmer;position:relative;box-shadow:0 0 10px #ff3232cc,0 0 4px #ffffffe6}@keyframes smooth-ping{0%{opacity:.8;transform:scale(.5)}to{opacity:0;transform:scale(3.5)}}@keyframes core-shimmer{0%,to{filter:brightness();transform:scale(1)}50%{filter:brightness(1.2);transform:scale(1.3)}}.admin-login-page{background:var(--bg);justify-content:center;align-items:center;min-height:100vh;display:flex}.admin-login-card{background:var(--card-bg);border:1px solid var(--border);text-align:center;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border-radius:24px;width:100%;max-width:400px;padding:40px}.admin-login-logo{margin-bottom:20px;font-size:3rem}.admin-login-title{font-family:var(--font-title);background:var(--gradient-text);-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;margin-bottom:8px;font-size:1.8rem}.admin-login-sub{color:var(--text-secondary);margin-bottom:30px;font-size:.9rem}.admin-login-field{text-align:left;margin-bottom:20px}.admin-login-field label{color:var(--text-muted);text-transform:uppercase;letter-spacing:.5px;margin-bottom:8px;font-size:.85rem;font-weight:600;display:block}.admin-login-field input{border:1px solid var(--border);width:100%;color:var(--text-primary);background:#0003;border-radius:12px;padding:12px 16px;font-size:1rem;transition:all .2s}.admin-login-field input:focus{border-color:var(--primary);box-shadow:0 0 0 3px var(--glow-blue);outline:none}.admin-login-btn{background:var(--gradient);color:#fff;cursor:pointer;border:none;border-radius:12px;width:100%;margin-top:10px;padding:14px;font-size:1rem;font-weight:600;transition:all .2s}.admin-login-btn:hover:not(:disabled){box-shadow:0 4px 20px var(--glow-blue);transform:translateY(-2px)}.admin-login-btn:disabled{opacity:.6;cursor:not-allowed}.admin-login-error{background:var(--incorrect-bg);color:var(--incorrect);border:1px solid var(--incorrect-border);border-radius:8px;margin-bottom:20px;padding:12px;font-size:.9rem}.admin-login-spinner{color:var(--text-secondary);font-weight:500}.explanation-box{color:var(--text-primary);background:#60a5fa14;border:1px solid #60a5fa33;border-radius:14px;margin-top:16px;padding:16px 20px;font-size:.95rem;line-height:1.6;animation:.3s ease-out modalFadeIn}.explanation-header{color:#60a5fa;text-transform:uppercase;letter-spacing:.5px;align-items:center;gap:8px;margin-bottom:8px;font-size:.85rem;font-weight:700;display:flex}.explanation-header svg{fill:currentColor;width:16px;height:16px}.show-explanation-btn{border:1px solid var(--border);color:var(--text-secondary);cursor:pointer;background:#ffffff0d;border-radius:12px;justify-content:center;align-items:center;gap:8px;width:100%;margin-top:16px;padding:10px 18px;font-family:inherit;font-size:.9rem;font-weight:600;transition:all .2s;display:flex}.show-explanation-btn:hover{color:var(--text-primary);background:#ffffff1a;border-color:#60a5fa66}.admin-edit-badge{color:#2dd4bf;text-transform:uppercase;letter-spacing:.5px;cursor:pointer;font-family:inherit;font-size:.72rem;font-weight:700;line-height:inherit;background:#14b8a61a;border:1px solid #14b8a64d;border-radius:50px;align-items:center;gap:6px;padding:4px 12px;transition:all .2s;display:flex}.admin-edit-badge:hover{background:#14b8a633;border-color:#14b8a680;transform:translateY(-1px)}.q-header-right{align-items:center;gap:8px;display:flex}.admin-edit-btn:hover{background:var(--primary);border-color:var(--primary);transform:scale(1.1)}.admin-modal-overlay{-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);z-index:9999;background:#000000b3;justify-content:center;align-items:center;padding:20px;display:flex;position:fixed;inset:0}.admin-modal{background:var(--bg-secondary);border:1px solid var(--border);border-radius:20px;width:100%;max-width:600px;max-height:90vh;padding:30px;overflow-y:auto;box-shadow:0 20px 40px #00000080}.admin-modal-header{border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;margin-bottom:24px;padding-bottom:16px;display:flex}.admin-modal-header h3{font-family:var(--font-title);color:var(--text-primary);font-size:1.4rem;font-weight:400}.admin-modal-close{color:var(--text-muted);cursor:pointer;background:0 0;border:none;border-radius:4px;padding:4px;font-size:1.5rem;line-height:1}.admin-modal-close:hover{color:var(--text-primary);background:#ffffff1a}.admin-field{margin-bottom:20px}.admin-field label{color:var(--text-secondary);margin-bottom:8px;font-size:.9rem;font-weight:600;display:block}.admin-field label small{color:var(--text-muted);font-weight:400}.admin-field textarea,.admin-field input[type=text]{border:1px solid var(--border);width:100%;color:var(--text-primary);resize:vertical;background:#0000004d;border-radius:12px;padding:12px;font-family:inherit;font-size:.95rem;line-height:1.5}.admin-field textarea:focus,.admin-field input[type=text]:focus{border-color:var(--primary);outline:none}.admin-option-row{align-items:center;gap:12px;margin-bottom:10px;display:flex}.admin-option-row input[type=radio]{cursor:pointer;width:20px;height:20px;accent-color:var(--correct)}.admin-opt-remove{color:var(--incorrect);cursor:pointer;background:#ef44441a;border:1px solid #0000;border-radius:8px;justify-content:center;align-items:center;width:32px;height:32px;display:flex}.admin-opt-remove:hover{background:var(--incorrect);color:#fff}.admin-add-opt-btn{border:1px dashed var(--border);color:var(--text-secondary);cursor:pointer;background:#ffffff0d;border-radius:8px;width:100%;margin-top:8px;padding:8px 16px;font-size:.85rem;font-weight:500}.admin-add-opt-btn:hover{color:var(--text-primary);background:#ffffff1a}.admin-type-tabs{gap:8px;margin-bottom:16px;display:flex}.admin-type-tab{border:1px solid var(--border);color:var(--text-secondary);cursor:pointer;background:#ffffff0d;border-radius:8px;flex:1;padding:10px;font-weight:500}.admin-type-tab.active{background:var(--primary);color:#fff;border-color:var(--primary)}.admin-modal-actions{border-top:1px solid var(--border);gap:12px;margin-top:30px;padding-top:20px;display:flex}.admin-save-btn{background:var(--correct);color:#fff;cursor:pointer;border:none;border-radius:8px;padding:10px 24px;font-weight:600}.admin-save-btn:disabled{opacity:.6;cursor:not-allowed}.admin-cancel-btn{color:var(--text-primary);border:1px solid var(--border);cursor:pointer;background:#ffffff0d;border-radius:8px;padding:10px 24px;font-weight:500}.admin-cancel-btn:hover{background:#ffffff1a}.admin-delete-btn{color:var(--text-muted);cursor:pointer;background:0 0;border:1px solid #0000;border-radius:8px;padding:10px 16px;font-weight:600}.admin-delete-btn:hover{color:var(--incorrect)}.admin-delete-btn.confirm{background:var(--incorrect);color:#fff}.admin-lecture-toolbar{background:#14b8a61a;border:1px solid #14b8a64d;border-radius:12px;justify-content:space-between;align-items:center;margin-bottom:24px;padding:12px 20px;display:flex}.admin-badge{color:#2dd4bf;letter-spacing:.5px;text-transform:uppercase;font-size:.9rem;font-weight:700}.admin-toolbar-right{gap:12px;display:flex}.admin-add-q-btn{color:#022c22;cursor:pointer;background:#2dd4bf;border:none;border-radius:8px;padding:8px 16px;font-size:.9rem;font-weight:600}.admin-add-q-btn:hover{background:#14b8a6}.admin-logout-btn{border:1px solid var(--border);color:var(--text-secondary);cursor:pointer;background:0 0;border-radius:8px;padding:8px 16px;font-size:.9rem}.admin-logout-btn:hover{color:var(--text-primary);background:#ffffff1a}.view-loading-overlay{background:var(--bg);z-index:1000;flex-direction:column;justify-content:center;align-items:center;gap:20px;animation:.3s fadeIn;display:flex;position:fixed;inset:0}.loading-spinner{border:3px solid #ffffff1a;border-top-color:var(--primary);border-radius:50%;width:48px;height:48px;animation:1s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.report-trigger-btn{color:#ef4444b3;cursor:pointer;letter-spacing:.2px;-webkit-backdrop-filter:blur(8px);background:#ef44440f;border:1px solid #ef44442e;border-radius:50px;align-items:center;gap:5px;padding:5px 11px;font-family:inherit;font-size:.75rem;font-weight:600;transition:all .2s;display:inline-flex}.report-trigger-btn svg{fill:currentColor;flex-shrink:0}.report-trigger-btn:hover{color:#ef4444;background:#ef444424;border-color:#ef444473;transform:translateY(-1px);box-shadow:0 4px 12px #ef444426}.report-modal-overlay{-webkit-backdrop-filter:blur(10px);z-index:10000;background:#000000b8;justify-content:center;align-items:center;padding:20px;animation:.18s fadeIn;display:flex;position:fixed;inset:0}.report-modal{background:linear-gradient(145deg,#0d1b2e 0%,#0a1220 100%);border:1px solid #ef444433;border-top-color:#ef444459;border-radius:22px;width:100%;max-width:480px;padding:28px;animation:.22s cubic-bezier(.175,.885,.32,1.275) reportModalIn;box-shadow:0 24px 60px #0009,inset 0 0 0 1px #ffffff0a,inset 0 1px #ffffff14}@keyframes reportModalIn{0%{opacity:0;transform:scale(.94)translateY(10px)}to{opacity:1;transform:scale(1)translateY(0)}}.report-modal-header{justify-content:space-between;align-items:center;margin-bottom:6px;display:flex}.report-modal-title{font-family:var(--font-title);color:var(--text-primary);align-items:center;gap:8px;font-size:1.15rem;font-weight:700;display:flex}.report-modal-title svg{fill:#ef4444;flex-shrink:0;width:18px;height:18px}.report-modal-close{color:var(--text-muted);cursor:pointer;background:0 0;border:none;border-radius:6px;padding:4px 6px;font-size:1.2rem;line-height:1;transition:all .18s}.report-modal-close:hover{color:var(--text-primary);background:#ffffff14}.report-modal-sub{color:var(--text-secondary);margin-top:4px;margin-bottom:20px;font-size:.88rem}.report-reasons{grid-template-columns:repeat(2,1fr);gap:9px;margin-bottom:20px;display:grid}.report-reason-chip{color:var(--text-secondary);cursor:pointer;text-align:left;-webkit-backdrop-filter:blur(8px);background:#ffffff0a;border:1px solid #ffffff14;border-radius:12px;align-items:center;gap:8px;padding:10px 14px;font-family:inherit;font-size:.85rem;font-weight:500;transition:all .18s;display:flex}.report-reason-chip:hover{color:var(--text-primary);background:#ef444414;border-color:#ef444447;transform:translateY(-1px)}.report-reason-chip.selected{color:#fca5a5;background:#ef444424;border-color:#ef444480;box-shadow:0 0 0 1px #ef444433,0 4px 12px #ef44441f}.report-details-wrap{margin-bottom:22px}.report-details-label{color:var(--text-secondary);letter-spacing:.2px;margin-bottom:8px;font-size:.82rem;font-weight:600;display:block}.report-details-label span{color:var(--text-muted);font-weight:400}.report-details-textarea{width:100%;color:var(--text-primary);resize:vertical;background:#00000059;border:1px solid #ffffff17;border-radius:12px;min-height:80px;padding:12px 14px;font-family:inherit;font-size:.9rem;line-height:1.55;transition:border-color .2s}.report-details-textarea:focus{border-color:#ef444466;outline:none;box-shadow:0 0 0 3px #ef444412}.report-details-textarea::placeholder{color:var(--text-muted)}.report-modal-actions{justify-content:flex-end;gap:10px;display:flex}.report-cancel-btn{color:var(--text-secondary);cursor:pointer;background:#ffffff0d;border:1px solid #ffffff1a;border-radius:10px;padding:10px 20px;font-family:inherit;font-size:.88rem;font-weight:600;transition:all .18s}.report-cancel-btn:hover{color:var(--text-primary);background:#ffffff1a}.report-submit-btn{color:#fff;cursor:pointer;text-shadow:0 1px 2px #0000004d;background:linear-gradient(135deg,#dc2626 0%,#b91c1c 100%);border:1px solid #ffffff1a;border-radius:10px;padding:10px 22px;font-family:inherit;font-size:.88rem;font-weight:700;transition:all .18s;box-shadow:0 4px 16px #dc26264d,inset 0 1px #ffffff26}.report-submit-btn:hover:not(:disabled){transform:translateY(-1px);box-shadow:0 8px 24px #dc262673,inset 0 1px #fff3}.report-submit-btn:disabled{opacity:.45;cursor:not-allowed;transform:none}.report-error-msg{color:#f87171;background:#ef444414;border:1px solid #ef444433;border-radius:10px;margin-bottom:14px;padding:10px 14px;font-size:.82rem}.report-success{text-align:center;flex-direction:column;justify-content:center;align-items:center;gap:10px;padding:30px 20px;animation:.3s fadeIn;display:flex}.report-success-icon{width:56px;height:56px;color:var(--correct);background:linear-gradient(135deg,#10b98140,#10b9811a);border:2px solid #10b98180;border-radius:50%;justify-content:center;align-items:center;margin-bottom:8px;font-size:1.6rem;display:flex;box-shadow:0 0 20px #10b98133}.report-success-title{font-family:var(--font-title);color:var(--text-primary);font-size:1.1rem;font-weight:700}.report-success-sub{color:var(--text-secondary);font-size:.88rem}@media (max-width:380px){.report-reasons{grid-template-columns:1fr}}.case-group-card{background:#ffffff05;border:1px solid #ffffff14;border-radius:24px;margin-bottom:30px;transition:all .3s;overflow:hidden}.case-group-card:hover{background:#ffffff08;border-color:#22d3ee4d}.case-group-header{background:#ffffff08;border-bottom:1px solid #ffffff0f;align-items:center;padding:12px 20px;display:flex}.case-badge{color:#fff;letter-spacing:1px;text-transform:uppercase;background:linear-gradient(135deg,#0891b2,#0e7490);border-radius:6px;padding:4px 10px;font-size:.7rem;font-weight:800}.case-group-questions{flex-direction:column;gap:10px;padding:10px;display:flex}.case-group-questions .question-card{box-shadow:none;background:0 0;border:none;margin-bottom:0}.case-group-questions .question-card:not(:last-child){border-bottom:1px solid #ffffff0a;border-radius:0;padding-bottom:20px}@media (max-width:640px){.export-pdf-overlay{align-items:flex-end!important;padding:12px!important}.export-pdf-modal-box{border-radius:18px 18px 12px 12px!important;max-width:100%!important;max-height:92dvh!important}.export-pdf-header{padding:16px 16px 14px!important}.export-lecture-list{padding-left:8px!important}}@media (max-width:480px){.export-pdf-overlay{align-items:flex-end!important;padding:0!important}.export-pdf-modal-box{border-bottom:none!important;border-radius:16px 16px 0 0!important;max-height:90dvh!important}.export-pdf-header{padding:14px 14px 12px!important}.export-lecture-list{padding-left:4px!important}.export-section-badge{display:none!important}}