:root{--font-main:"Inter", sans-serif;--font-display:"Outfit", sans-serif;--transition-speed:.3s;--transition-ease:cubic-bezier(.4, 0, .2, 1);--transition:all var(--transition-speed) var(--transition-ease)}:root[data-theme=light]{--bg-primary:#fff;--bg-secondary:#fffbf9;--bg-card:#fff;--accent:#ff6b00;--accent-hover:#e05e00;--accent-soft:#ff6b0014;--accent-glow:#ff6b0033;--text-primary:#1e293b;--text-secondary:#475569;--text-muted:#94a3b8;--text-on-accent:#fff;--border:#f1f5f9;--border-focus:#ff6b00;--shadow-sm:0 2px 8px #0000000a;--shadow:0 10px 30px -5px #ff6b0014, 0 4px 12px -2px #00000008;--shadow-lg:0 20px 40px -10px #ff6b001f;--card-glow:0 0 0 1px #ff6b000d}:root[data-theme=dark]{--bg-primary:#000;--bg-secondary:#060a13;--bg-card:#0c1220;--accent:#00d2ff;--accent-hover:#00aacf;--accent-soft:#00d2ff14;--accent-glow:#00d2ff40;--text-primary:#f8fafc;--text-secondary:#94a3b8;--text-muted:#64748b;--text-on-accent:#000;--border:#141c2f;--border-focus:#00d2ff;--shadow-sm:0 2px 8px #00000080;--shadow:0 10px 30px -5px #00d2ff26, 0 4px 12px -2px #0006;--shadow-lg:0 20px 45px -10px #00d2ff40;--card-glow:0 0 0 1px #00d2ff1a}*{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-main);background-color:var(--bg-primary);color:var(--text-primary);transition:background-color var(--transition-speed) var(--transition-ease), color var(--transition-speed) var(--transition-ease);line-height:1.5;overflow-x:hidden}h1,h2,h3,h4,h5,h6{font-family:var(--font-display);color:var(--text-primary);font-weight:700}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:var(--bg-primary)}::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--accent)}.app-container{flex-direction:column;min-height:100vh;display:flex}.main-wrapper{flex:1;padding-top:86px;display:flex}.content-container{background-color:var(--bg-secondary);min-width:0;transition:background-color var(--transition-speed) var(--transition-ease);flex-direction:column;flex:1;min-height:calc(100vh - 86px);padding:2rem;display:flex}.btn{font-family:var(--font-main);cursor:pointer;transition:var(--transition);border:1px solid #0000;border-radius:8px;justify-content:center;align-items:center;gap:.5rem;padding:.6rem 1.2rem;font-size:.9rem;font-weight:600;text-decoration:none;display:inline-flex}.btn-primary{background-color:var(--accent);color:var(--text-on-accent);box-shadow:0 4px 12px var(--accent-glow)}.btn-primary:hover{background-color:var(--accent-hover);box-shadow:0 6px 16px var(--accent-glow);transform:translateY(-2px)}.btn-secondary{border-color:var(--border);color:var(--text-primary);background-color:#0000}.btn-secondary:hover{background-color:var(--border);color:var(--text-primary)}.btn-accent-light{background-color:var(--accent-soft);color:var(--accent)}.btn-accent-light:hover{background-color:var(--accent-glow);color:var(--accent)}.btn-danger{color:#fff;background-color:#ef4444}.btn-danger:hover{background-color:#dc2626}.navbar{background-color:var(--bg-primary);border-bottom:1px solid var(--border);z-index:100;height:86px;transition:background-color var(--transition-speed) var(--transition-ease), border-color var(--transition-speed) var(--transition-ease);justify-content:space-between;align-items:center;padding:0 2rem;display:flex;position:fixed;top:0;left:0;right:0}.nav-left{align-items:center;gap:1rem;display:flex}.logo{font-family:var(--font-display);color:var(--text-primary);cursor:pointer;align-items:center;gap:.5rem;font-size:1.6rem;font-weight:700;display:flex}.nav-logo-img{transform-origin:0;object-fit:contain;width:auto;height:65px;transition:var(--transition);margin-right:15px;transform:scale(1.3)}.pdf-logo-img{object-fit:contain;vertical-align:middle;width:auto;height:30px}[data-theme=dark] .nav-logo-img{filter:invert()brightness(1.5)}.logo span{color:var(--accent)}.menu-toggle{color:var(--text-primary);cursor:pointer;transition:var(--transition);background:0 0;border:none;border-radius:8px;justify-content:center;align-items:center;padding:.5rem;display:flex}.menu-toggle:hover{background-color:var(--accent-soft);color:var(--accent)}.nav-right{align-items:center;gap:1.5rem;display:flex}.theme-toggle{color:var(--text-primary);cursor:pointer;border:none;border:1px solid var(--border);background:0 0;border-radius:20px;justify-content:center;align-items:center;min-width:40px;height:40px;padding:0;transition:all .4s cubic-bezier(.25,.8,.25,1);display:flex;overflow:hidden}.theme-toggle svg{flex-shrink:0;transition:transform .4s cubic-bezier(.25,.8,.25,1)}.theme-toggle:hover{background-color:var(--accent-soft);color:var(--accent);border-color:var(--accent);padding:0 .8rem}.theme-toggle:hover svg{transform:rotate(15deg)}.theme-text{opacity:0;white-space:nowrap;max-width:0;font-size:.85rem;font-weight:600;transition:all .4s cubic-bezier(.25,.8,.25,1);display:inline-block}.theme-toggle:hover .theme-text{opacity:1;max-width:100px;margin-left:.4rem}.profile-container{position:relative}.profile-trigger{color:var(--text-primary);cursor:pointer;transition:var(--transition);background:0 0;border:none;border-radius:30px;align-items:center;gap:.75rem;padding:.25rem;display:flex}.profile-avatar{background-color:var(--accent);width:36px;height:36px;color:var(--text-on-accent);font-weight:700;font-family:var(--font-display);border:2px solid var(--border);border-radius:50%;justify-content:center;align-items:center;font-size:1.1rem;display:flex}.profile-trigger:hover .profile-avatar{border-color:var(--accent)}.profile-name{font-size:.9rem;font-weight:600;display:none}@media (width>=768px){.profile-name{display:block}}.profile-dropdown{background-color:var(--bg-card);border:1px solid var(--border);width:240px;box-shadow:var(--shadow-lg);z-index:110;animation:slideDown .2s var(--transition-ease);border-radius:12px;flex-direction:column;gap:.75rem;padding:1rem;display:flex;position:absolute;top:120%;right:0}.dropdown-header{border-bottom:1px solid var(--border);padding-bottom:.75rem}.dropdown-name{word-break:break-all;font-size:1rem;font-weight:700}.dropdown-email{color:var(--text-muted);word-break:break-all;font-size:.8rem}.dropdown-item{border:none;border-bottom:1px solid var(--border);width:100%;color:var(--text-secondary);cursor:pointer;transition:var(--transition);text-align:left;background:0 0;align-items:center;gap:.8rem;padding:.8rem 1.2rem;font-family:inherit;font-size:.95rem;font-weight:500;display:flex}.dropdown-item:last-child{border-bottom:none}.dropdown-item:hover{background-color:var(--accent-soft);color:var(--accent)}.dropdown-item.danger{color:#ef4444}.dropdown-item.danger:hover{color:#ef4444;background-color:#ef444414}.sidebar-overlay{-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);z-index:85;transition:opacity var(--transition-speed) var(--transition-ease);opacity:0;pointer-events:none;background-color:#0006;display:none;position:fixed;inset:86px 0 0}.sidebar-overlay.active{opacity:1;pointer-events:auto;display:block}@media (width>=768px){.sidebar-overlay,.sidebar-overlay.active{pointer-events:none!important;display:none!important}}.sidebar{background-color:var(--bg-primary);border-right:1px solid var(--border);width:260px;height:calc(100vh - 86px);transition:var(--transition), margin-left var(--transition-speed) var(--transition-ease), transform var(--transition-speed) var(--transition-ease);z-index:90;flex-direction:column;flex-shrink:0;gap:0;margin-left:0;padding:1.5rem 1rem;display:flex;position:sticky;top:86px;overflow-y:auto;transform:translate(0)}.sidebar.collapsed{border-right-width:0;margin-left:-260px;transform:translate(-100%)}.sidebar-link{color:var(--text-secondary);cursor:pointer;transition:var(--transition);border:none;border-bottom:1px solid var(--border);text-align:left;background:0 0;align-items:center;gap:.8rem;width:100%;padding:1rem;font-family:inherit;font-size:1rem;font-weight:500;text-decoration:none;display:flex}.sidebar-link:last-child{border-bottom:none}.sidebar-link:hover{background-color:var(--accent-soft);color:var(--accent)}.sidebar-link.active{background-color:var(--accent-soft);color:var(--accent);border-left:4px solid var(--accent);padding-left:calc(1rem - 4px);font-weight:600}.auth-page{background:radial-gradient(circle at 80% 20%, var(--accent-soft) 0%, transparent 60%), var(--bg-secondary);min-height:100vh;transition:background var(--transition-speed) var(--transition-ease);justify-content:center;align-items:center;padding:1.5rem;display:flex}.auth-card{background-color:var(--bg-card);border:1px solid var(--border);width:100%;max-width:440px;box-shadow:var(--shadow-lg);animation:scaleUp .3s var(--transition-ease);border-radius:20px;flex-direction:column;gap:1.5rem;padding:2.5rem;display:flex}.auth-header{text-align:center;flex-direction:column;align-items:center;gap:.5rem;display:flex}.auth-title{letter-spacing:-.025em;font-size:2rem;font-weight:700}.auth-title span{color:var(--accent)}.auth-subtitle{color:var(--text-secondary);font-size:.9rem}.auth-google-btn{background-color:var(--bg-primary);border:1px solid var(--border);width:100%;color:var(--text-primary);cursor:pointer;box-shadow:var(--shadow-sm);transition:var(--transition);border-radius:10px;justify-content:center;align-items:center;gap:.75rem;padding:.8rem;font-size:.95rem;font-weight:600;display:flex}.auth-google-btn:hover{border-color:var(--accent);background-color:var(--bg-secondary);transform:translateY(-1px)}.auth-divider{text-align:center;color:var(--text-muted);align-items:center;font-size:.8rem;font-weight:500;display:flex}.auth-divider:before,.auth-divider:after{content:"";border-bottom:1px solid var(--border);flex:1}.auth-divider:not(:empty):before{margin-right:.75em}.auth-divider:not(:empty):after{margin-left:.75em}.form-group{flex-direction:column;gap:.4rem;display:flex}.form-label{color:var(--text-secondary);font-size:.85rem;font-weight:600}.form-input{border:1px solid var(--border);background-color:var(--bg-primary);width:100%;color:var(--text-primary);font-family:var(--font-main);transition:var(--transition);border-radius:10px;padding:.75rem 1rem;font-size:.95rem}.form-input:focus{border-color:var(--border-focus);box-shadow:0 0 0 3px var(--accent-glow);outline:none}.auth-toggle-link{text-align:center;color:var(--text-secondary);font-size:.9rem}.auth-toggle-link span{color:var(--accent);cursor:pointer;font-weight:600;text-decoration:underline}.auth-error{color:#ef4444;background-color:#ef444414;border:1px solid #ef444433;border-radius:8px;padding:.75rem 1rem;font-size:.85rem;font-weight:500}.continue-studying-banner{background:var(--bg-primary);border:1px dashed var(--border);max-width:600px;box-shadow:none;opacity:.8;border-radius:12px;justify-content:space-between;align-items:center;gap:1.5rem;margin:3rem auto 0;padding:1rem 1.5rem;transition:all .3s;display:flex}.continue-studying-banner:hover{box-shadow:var(--shadow-lg);border-color:var(--accent);opacity:1;transform:translateY(-5px)}.continue-banner-title{color:var(--accent);margin-bottom:.25rem;font-size:.95rem;font-weight:600}.continue-banner-subtitle{color:var(--text-secondary);flex-direction:column;gap:.25rem;font-size:.85rem;display:flex}.continue-banner-subtitle strong{color:var(--text-primary);white-space:nowrap;text-overflow:ellipsis;max-width:350px;overflow:hidden}.continue-date{color:var(--text-muted);font-size:.75rem}.continue-banner-btn{background-color:var(--accent-soft);color:var(--accent);cursor:pointer;white-space:nowrap;border:none;border-radius:8px;align-items:center;gap:.5rem;padding:.5rem 1rem;font-size:.85rem;font-weight:600;transition:all .3s;display:flex}.continue-banner-btn:hover{background-color:var(--accent);color:#fff;box-shadow:none}@media (width<=768px){.continue-studying-banner{flex-direction:row;gap:1rem;margin-top:2rem;padding:1rem}.continue-banner-subtitle strong{max-width:200px}.continue-banner-btn{padding:.5rem .8rem}.continue-banner-btn span{display:none}}.hero-section{text-align:center;flex-direction:column;gap:.75rem;max-width:800px;margin:0 auto 2rem;padding:2rem 0;display:flex}.hero-title{letter-spacing:-.025em;font-size:2.5rem;font-weight:800}.hero-title span{color:var(--accent)}.hero-subtitle{color:var(--text-secondary);font-size:.95rem;font-family:var(--font-display);letter-spacing:.02em;font-style:italic;font-weight:400}.confused-student-container{justify-content:center;align-items:flex-end;width:120px;height:90px;margin:0 auto;display:flex;position:relative}.student-body-confused{z-index:2;margin-bottom:5px;animation:3s ease-in-out infinite head-shake}.student-face-confused{background:var(--bg-primary);border-radius:50%;box-shadow:0 0 20px #f59e0b4d}.floating-icon{opacity:0;z-index:1;position:absolute;bottom:30px}.icon-code{animation:3s ease-in infinite float-pop-left}.icon-atom{animation:3.2s ease-in .5s infinite float-pop-right}.icon-cpu{animation:2.8s ease-in 1.2s infinite float-pop-left-high}.icon-calc{animation:3.5s ease-in 1.8s infinite float-pop-right-high}@keyframes head-shake{0%,to{transform:rotate(-5deg)}50%{transform:rotate(5deg)}}@keyframes float-pop-left{0%{opacity:0;transform:translate(0)scale(.5)rotate(0)}20%{opacity:1;transform:translate(-15px,-20px)scale(1)rotate(-15deg)}80%{opacity:.8}to{opacity:0;transform:translate(-30px,-50px)scale(1.2)rotate(-30deg)}}@keyframes float-pop-right{0%{opacity:0;transform:translate(0)scale(.5)rotate(0)}20%{opacity:1;transform:translate(15px,-15px)scale(1)rotate(15deg)}80%{opacity:.8}to{opacity:0;transform:translate(35px,-45px)scale(1.2)rotate(30deg)}}@keyframes float-pop-left-high{0%{opacity:0;transform:translate(0)scale(.5)rotate(0)}20%{opacity:1;transform:translate(-8px,-30px)scale(1)rotate(-10deg)}80%{opacity:.8}to{opacity:0;transform:translate(-20px,-70px)scale(1.2)rotate(-25deg)}}@keyframes float-pop-right-high{0%{opacity:0;transform:translate(0)scale(.5)rotate(0)}20%{opacity:1;transform:translate(8px,-25px)scale(1)rotate(10deg)}80%{opacity:.8}to{opacity:0;transform:translate(25px,-60px)scale(1.2)rotate(25deg)}}.subjects-grid{grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1.5rem;margin-bottom:3rem;display:grid}.subject-card{background-color:var(--bg-card);border:1px solid var(--border);cursor:pointer;box-shadow:var(--shadow-sm);transition:var(--transition);box-shadow:var(--card-glow);border-radius:16px;flex-direction:column;justify-content:space-between;gap:1.5rem;padding:1.5rem;display:flex;position:relative;overflow:hidden}.subject-card:before{content:"";background-color:var(--accent);opacity:.7;width:4px;height:100%;position:absolute;top:0;left:0}.subject-card:hover{box-shadow:var(--shadow-lg);border-color:var(--accent);transform:translateY(-5px)}.subject-card-header{flex-direction:column;gap:.5rem;display:flex}.subject-code{background-color:var(--accent-soft);color:var(--accent);font-size:.8rem;font-weight:700;font-family:var(--font-display);border-radius:20px;align-self:flex-start;padding:.25rem .6rem}.subject-title{font-size:1.25rem;font-weight:700;line-height:1.3}.subject-card-footer{color:var(--accent);justify-content:space-between;align-items:center;font-size:.9rem;font-weight:600;display:flex}.subject-card-footer span{align-items:center;gap:.25rem;display:flex}.subject-card:hover .subject-card-footer span svg{transition:transform .2s;transform:translate(4px)}@media (width<=768px){.subjects-grid{gap:.75rem;grid-template-columns:repeat(2,1fr)!important}.subject-card{gap:.75rem;padding:1rem}.subject-code{padding:.2rem .4rem;font-size:.7rem}.subject-title{font-size:.95rem}.subject-card-footer{font-size:.75rem}.subject-card-footer span svg{width:14px;height:14px}.content-container{padding:1rem}.navbar{padding:0 1rem}.logo{font-size:1.3rem}.nav-right{gap:1rem}.auth-card{padding:1.5rem}.auth-title{font-size:1.6rem}.hero-title{font-size:2rem}.subject-header-title{font-size:1.5rem}.btn{padding:.5rem 1rem;font-size:.85rem}}.back-btn{color:var(--text-secondary);cursor:pointer;transition:var(--transition);background:0 0;border:none;align-items:center;gap:.5rem;margin-bottom:1.5rem;font-weight:600;display:inline-flex}.back-btn:hover{color:var(--accent)}.subject-header-section{flex-wrap:wrap;justify-content:space-between;align-items:flex-start;gap:1rem;margin-bottom:2rem;display:flex}.subject-header-title{font-size:2rem;font-weight:800}.subject-header-code{font-family:var(--font-display);color:var(--accent);background-color:var(--accent-soft);border-radius:8px;padding:.3rem .8rem;font-size:1.1rem;font-weight:700}.tabs-container{border-bottom:1px solid var(--border);-webkit-overflow-scrolling:touch;gap:.5rem;margin-bottom:1.5rem;padding-bottom:2px;display:flex;overflow-x:auto}.tabs-container::-webkit-scrollbar{display:none}.tab-btn{color:var(--text-secondary);cursor:pointer;transition:var(--transition);white-space:nowrap;background:0 0;border:none;border-bottom:3px solid #0000;flex-shrink:0;padding:.8rem 1.2rem;font-size:.95rem;font-weight:600}.tab-btn:hover{color:var(--accent)}.tab-btn.active{color:var(--accent);border-bottom-color:var(--accent)}.subtabs-container{gap:.5rem;margin-bottom:1.5rem;display:flex}.subtab-btn{background-color:var(--bg-card);border:1px solid var(--border);color:var(--text-secondary);cursor:pointer;transition:var(--transition);white-space:nowrap;border-radius:20px;flex-shrink:0;padding:.4rem 1rem;font-size:.85rem;font-weight:600}.subtab-btn:hover{border-color:var(--accent);color:var(--accent)}.subtab-btn.active{background-color:var(--accent-soft);border-color:var(--accent);color:var(--accent)}.resources-list{grid-template-columns:1fr;gap:1rem;display:grid}@media (width>=992px){.resources-list{grid-template-columns:1fr 1fr}}.resource-item{background-color:var(--bg-card);border:1px solid var(--border);box-shadow:var(--shadow-sm);transition:var(--transition);border-radius:12px;justify-content:space-between;align-items:center;padding:1.25rem;display:flex}.resource-item:hover{border-color:var(--accent);box-shadow:var(--shadow);transform:translateY(-2px)}.resource-info{align-items:center;gap:1rem;display:flex}.resource-icon-box{background-color:var(--accent-soft);width:48px;height:48px;color:var(--accent);border-radius:10px;justify-content:center;align-items:center;display:flex}.resource-text{flex-direction:column;gap:.2rem;display:flex}.resource-title{font-size:1rem;font-weight:600;line-height:1.3}.resource-meta{color:var(--text-muted);font-size:.8rem}.resource-actions{gap:.5rem;display:flex}.empty-state{text-align:center;background-color:var(--bg-card);border:1px solid var(--border);color:var(--text-secondary);border-radius:16px;flex-direction:column;justify-content:center;align-items:center;gap:1rem;padding:3rem;display:flex}.empty-state svg{color:var(--text-muted)}.downloads-header{margin-bottom:2rem}.admin-grid{grid-template-columns:1fr;gap:2rem;display:grid}@media (width>=1024px){.admin-grid{grid-template-columns:1.2fr .8fr}}.admin-card{background-color:var(--bg-card);border:1px solid var(--border);box-shadow:var(--shadow);border-radius:16px;flex-direction:column;gap:1.5rem;padding:1.5rem;display:flex}.admin-title{border-bottom:1px solid var(--border);align-items:center;gap:.5rem;padding-bottom:.75rem;font-size:1.4rem;font-weight:700;display:flex}.admin-table-container{-webkit-overflow-scrolling:touch;overflow-x:auto}.admin-table{border-collapse:collapse;text-align:left;width:100%;font-size:.9rem}.admin-table th{background-color:var(--bg-secondary);color:var(--text-secondary);border-bottom:1px solid var(--border);padding:.75rem 1rem;font-weight:600}.admin-table td{border-bottom:1px solid var(--border);color:var(--text-primary);padding:.75rem 1rem}.admin-table tr:last-child td{border-bottom:none}.tag-method{background-color:var(--border);border-radius:12px;padding:.2rem .5rem;font-size:.75rem;font-weight:600}.admin-upload-form{flex-direction:column;gap:1rem;display:flex}.upload-success{color:#22c55e;background-color:#22c55e14;border:1px solid #22c55e33;border-radius:8px;padding:.75rem 1rem;font-size:.85rem;font-weight:500}.pdf-viewer-overlay{z-index:1000;background-color:#525659;justify-content:center;align-items:center;padding:0;display:flex;position:fixed;inset:0}.pdf-viewer-container{width:100vw;max-width:100vw;height:100vh;animation:fadeIn .2s var(--transition-ease);background-color:#525659;border-radius:0;flex-direction:column;display:flex;overflow:hidden}.pdf-viewer-header{color:#f1f1f1;z-index:10;background-color:#323639;justify-content:space-between;align-items:center;padding:.6rem 1.5rem;display:flex;box-shadow:0 1px 4px #0006}.pdf-title-box{align-items:center;gap:.75rem;display:flex}.pdf-tag{color:#fff;background-color:#ef4444;border-radius:4px;padding:.2rem .5rem;font-size:.75rem;font-weight:600}.pdf-title{letter-spacing:.3px;font-size:1.05rem;font-weight:500}.pdf-viewer-controls{align-items:center;gap:.5rem;display:flex}.pdf-control-btn{color:#e8eaed;cursor:pointer;background:0 0;border:none;border-radius:50%;justify-content:center;align-items:center;padding:.5rem;transition:background-color .2s;display:flex}.pdf-control-btn:hover{color:#fff;background-color:#ffffff14}.pdf-page-indicator{color:#cbd5e1;font-size:.85rem}.pdf-body{background-color:#525659;flex:1;justify-content:center;padding:0;display:flex;overflow:hidden}.pdf-page-sheet{color:#000;background-color:#fff;flex-direction:column;width:100%;max-width:700px;min-height:800px;padding:3rem 2.5rem;display:flex;box-shadow:0 4px 12px #00000040}.pdf-sheet-header{border-bottom:2px solid #000;justify-content:space-between;align-items:center;margin-bottom:2rem;padding-bottom:1rem;display:flex}.pdf-sheet-logo{font-family:var(--font-display);color:#1e293b;font-size:1.2rem;font-weight:700}.pdf-sheet-logo span{color:var(--accent)}.pdf-sheet-subcode{color:#64748b;border:1px solid #e2e8f0;border-radius:4px;padding:.2rem .5rem;font-size:.85rem;font-weight:600}.pdf-sheet-title{color:#1e293b;margin-bottom:.5rem;font-size:1.6rem;font-weight:700;line-height:1.2}.pdf-sheet-meta{color:#64748b;gap:1rem;margin-bottom:2rem;font-size:.85rem;display:flex}.pdf-section{margin-bottom:1.5rem}.pdf-section-heading{color:#000;border-bottom:1px solid #000;margin-bottom:.75rem;padding-bottom:.3rem;font-size:1.1rem;font-weight:700}.pdf-section-p{color:#334155;margin-bottom:1rem;font-size:.95rem;line-height:1.6}.pdf-question-block{background-color:#fff;border-left:3px solid #000;border-radius:0 8px 8px 0;margin-bottom:1.5rem;padding:1rem}.pdf-question-title{color:#1e293b;margin-bottom:.5rem;font-size:.95rem;font-weight:700}.pdf-solution-title{color:#000;margin-top:.5rem;font-size:.85rem;font-weight:600}.pdf-sheet-footer{text-align:center;color:#94a3b8;border-top:1px solid #e2e8f0;margin-top:auto;padding-top:1rem;font-size:.8rem}.footer{background-color:var(--bg-primary);border-top:1px solid var(--border);text-align:center;transition:var(--transition);flex-direction:column;align-items:center;gap:.75rem;margin-top:auto;padding:2rem;display:flex}.footer-logo{font-family:var(--font-display);font-size:1.3rem;font-weight:700}.footer-logo span{color:var(--accent)}.footer-admins{color:var(--text-secondary);flex-direction:column;align-items:center;gap:.25rem;font-size:.9rem;display:flex}.footer-admins-title{color:var(--text-primary);font-weight:600}.footer-admins-list{gap:1.5rem;list-style:none;display:flex}.footer-admins-list li{position:relative}.footer-admins-list li:not(:last-child):after{content:"|";color:var(--border);position:absolute;right:-.75rem}.footer-copyright{color:var(--text-muted);margin-top:.5rem;font-size:.8rem}@keyframes slideDown{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}@keyframes scaleUp{0%{opacity:0;transform:scale(.95)}to{opacity:1;transform:scale(1)}}.hero-brand-name{color:var(--accent);cursor:default;justify-content:center;font-size:1.5em;font-weight:700;line-height:1;display:flex}.dance-letter{animation:.8s cubic-bezier(.34,1.56,.64,1) both letterDropIn;display:inline-block}@keyframes letterDropIn{0%{opacity:0;transform:translateY(15px)scale(.8)}to{opacity:1;transform:translateY(0)scale(1)}}@media (hover:hover) and (pointer:fine){.hero-brand-name:hover .dance-letter{animation:.6s cubic-bezier(.34,1.56,.64,1) both letterDanceHover}}@keyframes letterDanceHover{0%{opacity:1;transform:translateY(0)scale(1)}50%{opacity:1;text-shadow:0 10px 20px var(--accent-glow);color:var(--accent-hover);transform:translateY(-8px)scale(1.1)}to{opacity:1;transform:translateY(0)scale(1)}}@media (width<=767px){.main-wrapper{position:relative}.sidebar{z-index:90;width:240px;transition:transform var(--transition-speed) var(--transition-ease);position:fixed;top:70px;bottom:0;left:0;transform:translate(0);box-shadow:10px 0 30px #00000026}.sidebar.collapsed{width:240px;box-shadow:none;border-right-width:0;transform:translate(-100%)}.content-container{width:100%;padding:1rem}.hero-title{font-size:2rem}.subject-header-title{font-size:1.6rem}.logo{font-size:1.2rem}.navbar .logo span{display:none}.nav-right{gap:.5rem}.navbar{padding:0 1rem}.subtabs-container{-webkit-overflow-scrolling:touch;padding-bottom:2px;overflow-x:auto}.subtabs-container::-webkit-scrollbar{display:none}.admin-card{padding:1rem}.subjects-grid{grid-template-columns:1fr}.resource-item{flex-direction:column;align-items:flex-start;gap:1rem}.resource-actions{justify-content:flex-end;width:100%}.auth-card{padding:1.5rem}.auth-title{font-size:1.5rem}.desktop-only{display:none!important}.pdf-viewer-overlay{padding:0}.pdf-viewer-container{border-radius:0;height:100vh}.pdf-body{padding:.5rem}.pdf-page-sheet{min-height:auto;padding:1rem .75rem}.pdf-sheet-title{font-size:1.1rem}.pdf-viewer-header{flex-direction:column;align-items:flex-start;gap:.75rem;padding:.75rem 1rem}.pdf-title-box{width:100%}.pdf-viewer-controls{justify-content:space-between;width:100%}.pdf-title{white-space:nowrap;text-overflow:ellipsis;max-width:80vw;overflow:hidden}.footer{padding:1.5rem 1rem}.footer-admins-list{flex-wrap:wrap;justify-content:center;gap:.75rem}}.year-grid{flex-wrap:wrap;justify-content:center;gap:2rem;width:100%;max-width:1100px;margin-top:2.5rem;margin-left:auto;margin-right:auto;display:flex}.year-grid>div{width:calc(50% - 1rem);min-width:300px}@media (width<=768px){.year-grid>div{width:100%}}.year-card{background:linear-gradient(145deg, var(--bg-card) 70%, var(--accent-soft));border:1px solid var(--border);border-radius:16px;flex-direction:column;gap:1.5rem;padding:1.8rem;transition:all .3s cubic-bezier(.4,0,.2,1);display:flex;position:relative;overflow:hidden;box-shadow:-8px 0 25px #0000000a,8px 0 25px #0000000a,0 4px 20px #0000000f}.year-card:before{content:"";background:var(--accent);opacity:.4;width:4px;height:100%;transition:var(--transition);position:absolute;top:0;left:0}.year-card:hover{border-color:var(--accent);transform:translateY(-4px);box-shadow:-10px 0 30px #00000014,10px 0 30px #00000014,0 8px 30px #0000001f}.year-card:hover:before{opacity:1}.year-header{flex-direction:column;gap:.4rem;display:flex}.year-subtitle{color:var(--text-secondary);font-size:.9rem;line-height:1.5}.year-title{color:var(--text-primary);align-items:center;gap:.5rem;font-size:1.3rem;font-weight:700;display:flex}.semester-buttons{flex-wrap:wrap;gap:1rem;display:flex}.semester-btn{background:var(--accent-soft);color:var(--accent);cursor:pointer;text-align:center;border:1px solid #0000;border-radius:12px;flex:1;padding:.8rem 1rem;font-size:.95rem;font-weight:600;transition:all .3s;position:relative;overflow:hidden}.semester-btn:hover{background-color:var(--accent);color:#fff;border-color:var(--accent);box-shadow:0 6px 15px var(--accent-glow);transform:translateY(-2px)}.modal-overlay{z-index:1000;background:#00000080;justify-content:center;align-items:center;width:100vw;height:100vh;display:flex;position:fixed;top:0;left:0}.modal-content{background:var(--bg-card);box-shadow:var(--shadow-lg);border-radius:12px;width:90%;max-width:400px;padding:2rem}.global-search-container{background-color:#0000;border:1px solid #0000;border-radius:24px;align-items:center;width:40px;height:40px;transition:all .4s cubic-bezier(.25,.8,.25,1);display:flex;position:relative;overflow:visible}.global-search-container:not(.active):hover{background-color:var(--accent-soft)}.global-search-container.active{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-glow);background-color:var(--bg-card);width:300px}.search-toggle-btn{color:var(--text-primary);cursor:pointer;z-index:2;background:0 0;border:none;border-radius:20px;flex-shrink:0;justify-content:center;align-items:center;width:40px;height:40px;transition:all .3s;display:flex}.search-toggle-btn:hover{color:var(--accent);background-color:var(--accent-soft)}.search-input-wrapper{opacity:0;pointer-events:none;width:0;transition:width .4s cubic-bezier(.25,.8,.25,1),opacity .3s;position:relative;overflow:visible}.global-search-container.active .search-input-wrapper{opacity:1;pointer-events:auto;width:250px}.global-search-input{width:100%;height:100%;color:var(--text-primary);font-family:var(--font-main);background:0 0;border:none;padding:0 10px 0 0;font-size:.95rem}.global-search-input:focus{outline:none}.search-results-dropdown{background-color:var(--bg-card);border:1px solid var(--border);width:320px;box-shadow:var(--shadow-lg);z-index:120;animation:slideDown .2s var(--transition-ease);border-radius:12px;flex-direction:column;display:flex;position:absolute;top:calc(100% + 15px);right:-10px;overflow:hidden}.search-result-item{cursor:pointer;border-bottom:1px solid var(--border);align-items:center;gap:.75rem;padding:.75rem 1rem;transition:background-color .2s;display:flex}.search-result-item:last-child{border-bottom:none}.search-result-item:hover{background-color:var(--accent-soft)}.result-icon{color:var(--accent);flex-shrink:0}.result-text{flex-direction:column;gap:.2rem;display:flex;overflow:hidden}.result-title{color:var(--text-primary);white-space:nowrap;text-overflow:ellipsis;font-size:.9rem;font-weight:600;overflow:hidden}.result-code{color:var(--text-muted);font-size:.75rem;font-weight:700;font-family:var(--font-display)}.search-result-empty{text-align:center;color:var(--text-muted);padding:1rem;font-size:.9rem}@media (width<=768px){.global-search-container{width:40px}.search-input-wrapper{box-sizing:border-box;background-color:var(--bg-card);border:1px solid var(--border);z-index:90;opacity:0;pointer-events:none;border-radius:24px;width:auto;height:48px;padding-left:20px;padding-right:20px;transition:all .3s cubic-bezier(.25,.8,.25,1);position:fixed;top:70px;left:20px;right:20px}.global-search-container.active{width:40px;box-shadow:none;background:0 0;border-color:#0000}.global-search-container.active .search-input-wrapper{opacity:1;pointer-events:auto;border-color:var(--accent);width:auto;box-shadow:0 8px 30px #00000026, 0 0 0 3px var(--accent-glow);top:96px}.search-results-dropdown{width:100%;top:55px;right:0}}[data-theme=dark] .smart-logo{filter:invert()brightness(1.5);mix-blend-mode:screen}[data-theme=light] .smart-logo{mix-blend-mode:multiply}.credits-overlay{-webkit-backdrop-filter:blur(8px);z-index:1000;background:#0009;justify-content:center;align-items:center;display:flex}.credits-modal-content{background:var(--bg-card);border:1px solid var(--border);border-radius:20px;width:90%;max-width:850px;max-height:90vh;padding:2.5rem;animation:.3s cubic-bezier(.16,1,.3,1) modal-enter;position:relative;overflow-y:auto;box-shadow:0 25px 50px -12px #00000080,inset 0 0 0 1px #ffffff0d}.credits-header{justify-content:space-between;align-items:center;margin-bottom:.5rem;display:flex}.credits-header h2{background:linear-gradient(135deg, var(--text-primary) 0%, var(--accent) 100%);-webkit-text-fill-color:transparent;-webkit-background-clip:text;margin:0;font-size:2.2rem;font-weight:700}.credits-subtitle{color:var(--text-secondary);margin-bottom:2.5rem;font-size:1.05rem}.credits-close-btn{border:1px solid var(--border);width:40px;height:40px;color:var(--text-secondary);cursor:pointer;background:0 0;border-radius:50%;justify-content:center;align-items:center;transition:all .2s;display:flex}.credits-close-btn:hover{background:var(--bg-hover);color:var(--text-primary);transform:scale(1.1)rotate(90deg)}.credits-grid{grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:1.5rem;display:grid}.credit-card{background:linear-gradient(145deg,#ffffff08 0%,#ffffff03 100%);border:1px solid #ffffff0d;border-radius:16px;flex-direction:column;gap:1.25rem;padding:1.5rem;transition:all .3s cubic-bezier(.16,1,.3,1);display:flex;position:relative;overflow:hidden}.credit-card:hover{background:linear-gradient(145deg, var(--accent-soft) 0%, #ffffff03 100%);box-shadow:0 10px 30px -10px var(--accent-glow);border-color:#ffffff1a;transform:translateY(-5px)}.credit-card-top{justify-content:space-between;align-items:flex-start;gap:1rem;display:flex}.credit-avatar{background:var(--accent-soft);border:1px solid var(--border);border-radius:16px;justify-content:center;align-items:center;width:60px;height:60px;display:flex}.credit-card-header h3{color:var(--text-primary);margin:0;font-size:1.2rem;font-weight:600;line-height:1.3}.name-rudra{background:linear-gradient(90deg,#f97316,#ec4899,#a855f7,#3b82f6,#10b981,#f97316) 0 0/300%;-webkit-text-fill-color:transparent;-webkit-background-clip:text;background-clip:text;animation:4s linear infinite gradientShift;font-size:1.25rem!important;font-weight:700!important}@keyframes gradientShift{0%{background-position:0%}to{background-position:300%}}.name-content-lead{-webkit-text-fill-color:#06b6d4;color:#06b6d4!important;font-weight:600!important}.name-raghuraj{-webkit-text-fill-color:#a78bfa;color:#a78bfa!important;font-weight:600!important}.linkedin-icon-link{color:#0a66c2;background:#0a66c21a;border-radius:12px;flex-shrink:0;justify-content:center;align-items:center;padding:10px;transition:all .2s cubic-bezier(.16,1,.3,1);display:flex}.linkedin-icon-link:hover{color:#fff;background:#0a66c2;transform:scale(1.1)rotate(-5deg);box-shadow:0 4px 12px #0a66c24d}.credit-roles{flex-direction:column;gap:.75rem;display:flex}.role-badge{border-radius:8px;align-items:center;gap:.5rem;width:fit-content;padding:.5rem .8rem;font-size:.85rem;font-weight:500;transition:all .2s;display:inline-flex}.role-primary{background:var(--accent-soft);color:var(--accent);border:1px solid var(--border)}.credit-card:hover .role-primary{border-color:var(--accent)}.role-secondary{background:var(--bg-secondary);color:var(--text-secondary);border:1px solid var(--border)}.credit-card:hover .role-secondary{color:var(--text-primary);border-color:#ffffff1a}@media (width<=768px){.credits-modal-content{width:95%;max-height:85vh;padding:1.5rem}.credits-header h2{font-size:1.5rem}.credits-subtitle{margin-bottom:1.5rem;font-size:.9rem}.credits-grid{grid-template-columns:1fr;gap:1rem}.credit-card{padding:1.25rem}.credit-avatar{width:48px;height:48px}}@keyframes modal-enter{0%{opacity:0;transform:scale(.97)translateY(20px)}to{opacity:1;transform:scale(1)translateY(0)}}