@import "https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500&display=swap";
:root{--bg-base:#fbfbfa;--bg-surface:#fff;--bg-card:#fff;--bg-card-hover:#f4f4f1;--bg-elevated:#f2f3ef;--border:#e2e4df;--border-strong:#cbd0c8;--text-primary:#1c231f;--text-secondary:#4a554e;--text-muted:#828e86;--accent-from:#4a6051;--accent-to:#3b4f42;--accent:#d9745b;--accent-glow:#d9745b33;--status-pending-bg:#fef9c3;--status-pending-text:#854d0e;--status-pending-border:#fef08a;--status-processing-bg:#e6ece8;--status-processing-text:#3b4f42;--status-processing-border:#c8d3cc;--status-completed-bg:#e8f5e9;--status-completed-text:#2e7d32;--status-completed-border:#c8e6c9;--status-failed-bg:#ffebee;--status-failed-text:#c62828;--status-failed-border:#ffcdd2;--type-pdf:#c62828;--type-docx:#4a6051;--type-pptx:#d9745b;--type-mp3:#6e8876;--type-mp4:#2e7d32;--type-image:#d97706;--type-txt:#828e86;--sidebar-width:220px;--header-height:60px;--radius:12px;--radius-sm:8px;--radius-lg:16px;--shadow-sm:0 1px 3px 0 #1c231f0d;--shadow-md:0 4px 8px -1px #1c231f14, 0 2px 4px -2px #1c231f0a}.dark{--bg-base:#131b16;--bg-surface:#1a241e;--bg-card:#1e2a23;--bg-card-hover:#26342b;--bg-elevated:#2a3a30;--border:#ffffff1a;--border-strong:#ffffff2e;--text-primary:#f0f4f1;--text-secondary:#9eada2;--text-muted:#6e7e73;--accent-from:#6e8876;--accent-to:#4a6051;--accent:#e0856e;--accent-glow:#e0856e40;--status-pending-bg:#d9770626;--status-pending-text:#f59e0b;--status-pending-border:#d977064d;--status-processing-bg:#6e88762e;--status-processing-text:#9eada2;--status-processing-border:#6e88764d;--status-completed-bg:#2e7d322e;--status-completed-text:#4ade80;--status-completed-border:#2e7d324d;--status-failed-bg:#c628282e;--status-failed-text:#f87171;--status-failed-border:#c628284d;--type-pdf:#f87171;--type-docx:#81a38c;--type-pptx:#e0856e;--type-mp3:#a8c3b0;--type-mp4:#4ade80;--type-image:#fbbf24;--type-txt:#9eada2;--shadow-sm:0 1px 3px 0 #0006;--shadow-md:0 4px 8px -1px #0009}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html{font-size:14px}body{background-color:var(--bg-base);color:var(--text-primary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-family:Inter,-apple-system,BlinkMacSystemFont,sans-serif;line-height:1.6;transition:background-color .25s,color .25s;overflow-x:hidden}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:var(--bg-base)}::-webkit-scrollbar-thumb{background:var(--bg-elevated);border-radius:99px}::-webkit-scrollbar-thumb:hover{background:var(--accent)}h1{letter-spacing:-.02em;color:var(--text-primary);font-size:1.75rem;font-weight:700}h2{letter-spacing:-.01em;color:var(--text-primary);font-size:1.25rem;font-weight:600}h3{color:var(--text-primary);font-size:1rem;font-weight:600}p{color:var(--text-secondary)}code,pre{font-family:JetBrains Mono,monospace}.app-layout{min-height:100vh;display:flex}.main-content{min-width:0;margin-left:calc(var(--sidebar-width) + 16px);flex-direction:column;flex:1;display:flex}.page-content{flex:1;max-width:1200px;padding:24px 28px}.sidebar{width:var(--sidebar-width);background:var(--bg-surface);border:1px solid var(--border);height:calc(100vh - 32px);box-shadow:var(--shadow-md);z-index:100;border-radius:16px;flex-direction:column;transition:background-color .25s,border-color .25s;display:flex;position:fixed;top:16px;left:16px;overflow:hidden}.sidebar-logo{border-bottom:1px solid var(--border);flex-shrink:0;align-items:center;gap:10px;padding:20px 20px 16px;display:flex}.sidebar-logo-icon{background:linear-gradient(135deg, var(--accent-from), var(--accent-to));width:32px;height:32px;box-shadow:0 4px 12px var(--accent-glow);border-radius:8px;flex-shrink:0;justify-content:center;align-items:center;font-size:16px;display:flex}.sidebar-logo-text{background:linear-gradient(135deg, var(--accent-from), var(--accent-to));-webkit-text-fill-color:transparent;letter-spacing:-.02em;-webkit-background-clip:text;background-clip:text;font-size:1.1rem;font-weight:800}.sidebar-nav{flex-direction:column;flex:1;gap:3px;padding:12px 10px;display:flex;overflow-y:auto}.nav-item{border-radius:var(--radius-sm);color:var(--text-secondary);cursor:pointer;border:1px solid #0000;align-items:center;gap:10px;padding:9px 12px;font-size:.875rem;font-weight:500;text-decoration:none;transition:all .15s;display:flex}.nav-item:hover{background:var(--bg-card-hover);color:var(--text-primary)}.nav-item.active{color:var(--accent);background:#4f46e514;border-color:#4f46e533;font-weight:600}.nav-item.active .nav-icon{color:var(--accent)}.nav-icon{opacity:.85;flex-shrink:0;width:18px;height:18px;transition:color .15s}.sidebar-footer{border-top:1px solid var(--border);flex-shrink:0;padding:12px 14px}.topbar{height:var(--header-height);border:1px solid var(--border);background:var(--bg-surface);box-shadow:var(--shadow-sm);z-index:50;border-radius:14px;justify-content:space-between;align-items:center;margin:16px 20px 0;padding:0 24px;transition:background-color .25s,border-color .25s;display:flex;position:sticky;top:16px}.topbar-title{color:var(--text-secondary);font-size:.875rem}.topbar-title strong{color:var(--text-primary);font-weight:600}.card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-sm);padding:20px;transition:border-color .2s,background-color .25s}.card:hover{border-color:var(--border-strong)}.stats-grid{grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:16px;margin-bottom:28px;display:grid}.stat-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-sm);padding:20px;transition:all .2s;position:relative;overflow:hidden}.stat-card:before{content:"";background:linear-gradient(90deg, var(--accent-from), var(--accent-to));opacity:0;height:3px;transition:opacity .2s;position:absolute;top:0;left:0;right:0}.stat-card:hover:before{opacity:1}.stat-card:hover{border-color:var(--border-strong);transform:translateY(-1px)}.stat-label{color:var(--text-muted);text-transform:uppercase;letter-spacing:.06em;margin-bottom:8px;font-size:.72rem;font-weight:600}.stat-value{color:var(--text-primary);letter-spacing:-.03em;font-size:2rem;font-weight:700;line-height:1}.stat-icon{border-radius:8px;justify-content:center;align-items:center;width:36px;height:36px;display:flex;position:absolute;top:16px;right:16px}.btn{border-radius:var(--radius-sm);cursor:pointer;white-space:nowrap;border:1px solid #0000;align-items:center;gap:6px;padding:8px 16px;font-family:inherit;font-size:.875rem;font-weight:500;text-decoration:none;transition:all .15s;display:inline-flex}.btn-primary{background:linear-gradient(135deg, var(--accent-from), var(--accent-to));color:#fff;box-shadow:0 3px 10px var(--accent-glow)}.btn-primary:hover{box-shadow:0 5px 16px var(--accent-glow);transform:translateY(-1px)}.btn-secondary{background:var(--bg-elevated);color:var(--text-primary);border-color:var(--border)}.btn-secondary:hover{background:var(--bg-card-hover);border-color:var(--border-strong)}.btn-ghost{color:var(--text-secondary);background:0 0}.btn-ghost:hover{background:var(--bg-card-hover);color:var(--text-primary)}.btn-icon{justify-content:center;width:32px;height:32px;padding:6px}.btn-danger{background:var(--status-failed-bg);color:var(--status-failed-text);border-color:var(--status-failed-border)}.btn-sm{padding:5px 10px;font-size:.8rem}.badge{letter-spacing:.02em;white-space:nowrap;border:1px solid;border-radius:999px;align-items:center;gap:5px;padding:3px 9px;font-size:.72rem;font-weight:600;display:inline-flex}.badge-pending{background:var(--status-pending-bg);color:var(--status-pending-text);border-color:var(--status-pending-border)}.badge-classifying,.badge-extracting,.badge-cleaning,.badge-summarizing,.badge-generating_quiz,.badge-generating_flashcard,.badge-processing{background:var(--status-processing-bg);color:var(--status-processing-text);border-color:var(--status-processing-border)}.badge-completed{background:var(--status-completed-bg);color:var(--status-completed-text);border-color:var(--status-completed-border)}.badge-failed{background:var(--status-failed-bg);color:var(--status-failed-text);border-color:var(--status-failed-border)}.file-type-badge{letter-spacing:.04em;text-transform:uppercase;border-radius:4px;align-items:center;padding:2px 7px;font-size:.7rem;font-weight:700;display:inline-flex}.ftype-pdf{color:var(--type-pdf);background:#ef44441f}.ftype-docx,.ftype-doc{color:var(--type-docx);background:#3b82f61f}.ftype-pptx{color:var(--type-pptx);background:#f973161f}.ftype-mp3,.ftype-wav,.ftype-m4a{color:var(--type-mp3);background:#8b5cf61f}.ftype-mp4{color:var(--type-mp4);background:#10b9811f}.ftype-jpg,.ftype-jpeg,.ftype-png{color:var(--type-image);background:#ec48991f}.ftype-txt{color:var(--type-txt);background:#64748b1f}.ftype-multi{color:var(--accent);background:#6366f126}.table-wrapper{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow-sm);overflow-x:auto}.table-header{border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;padding:16px 20px;display:flex}table{border-collapse:collapse;width:100%}thead th{text-align:left;color:var(--text-muted);text-transform:uppercase;letter-spacing:.06em;border-bottom:1px solid var(--border);white-space:nowrap;padding:11px 16px;font-size:.72rem;font-weight:600}tbody tr{border-bottom:1px solid var(--border);transition:background-color .12s}tbody tr:last-child{border-bottom:none}tbody tr:hover{background:var(--bg-card-hover)}tbody td{color:var(--text-primary);vertical-align:middle;padding:12px 16px;font-size:.875rem}.td-filename{align-items:center;gap:10px;max-width:260px;display:flex}.td-filename-text{white-space:nowrap;text-overflow:ellipsis;font-weight:500;overflow:hidden}.td-actions{align-items:center;gap:6px;display:flex}.upload-zone{border:2px dashed var(--border-strong);border-radius:var(--radius-lg);text-align:center;cursor:pointer;background:var(--bg-card);flex-direction:column;justify-content:center;align-items:center;gap:14px;padding:50px 32px;transition:all .2s;display:flex}.upload-zone:hover,.upload-zone.dragging{border-color:var(--accent);box-shadow:0 0 0 4px var(--accent-glow);background:#6366f10a}.upload-zone-icon{background:#6366f11f;border-radius:14px;justify-content:center;align-items:center;width:52px;height:52px;margin-bottom:2px;display:flex}.upload-zone-title{color:var(--text-primary);font-size:1.05rem;font-weight:600}.upload-zone-subtitle{color:var(--text-muted);max-width:420px;font-size:.82rem;line-height:1.5}@keyframes recordPulse{0%{transform:scale(1);box-shadow:0 0 #ef444466}50%{transform:scale(1.08);box-shadow:0 0 0 16px #ef444400}to{transform:scale(1);box-shadow:0 0 #ef444400}}@keyframes rippleRing{0%{opacity:.8;transform:scale(.85)}to{opacity:0;transform:scale(2.4)}}@keyframes recBlink{0%,to{opacity:1}50%{opacity:.25}}.rec-pulse-badge{animation:1.6s ease-in-out infinite recordPulse}.rec-blink-dot{animation:1.2s ease-in-out infinite recBlink}.ripple-ring-1{pointer-events:none;border:2px solid #ef444499;border-radius:50%;animation:2s cubic-bezier(.1,.8,.3,1) infinite 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.flashcard-inner{transform:rotateY(180deg)}.flashcard-front,.flashcard-back{border-radius:var(--radius);text-align:center;backface-visibility:hidden;box-shadow:var(--shadow-sm);justify-content:center;align-items:center;padding:20px;display:flex;position:absolute;inset:0}.flashcard-front{background:var(--bg-card);border:1px solid var(--border);color:var(--text-primary);font-size:.9rem;font-weight:600}.flashcard-back{border:1px solid var(--accent);color:var(--text-primary);background:#6366f114;font-size:.85rem;line-height:1.6;transform:rotateY(180deg)}.form-group{flex-direction:column;gap:6px;margin-bottom:16px;display:flex}.form-label{color:var(--text-secondary);text-transform:uppercase;letter-spacing:.05em;font-size:.78rem;font-weight:600}input,select,textarea{background:var(--bg-surface);border:1px solid var(--border-strong);border-radius:var(--radius-sm);color:var(--text-primary);outline:none;width:100%;padding:9px 12px;font-family:inherit;font-size:.875rem;transition:border-color 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*{visibility:hidden}.printable-pdf-document,.printable-pdf-document *{visibility:visible}.printable-pdf-document{width:100%;margin:0;padding:20px;position:absolute;top:0;left:0;color:#000!important;box-shadow:none!important;background:#fff!important;border:none!important}}.presentation-modal-overlay{z-index:99999;color:#f8fafc;background:radial-gradient(circle at top,#1e1b4b,#0f172a 60%,#030712);flex-direction:column;animation:.3s cubic-bezier(.16,1,.3,1) presentationFadeIn;display:flex;position:fixed;inset:0;overflow:hidden}@keyframes presentationFadeIn{0%{opacity:0;transform:scale(.98)}to{opacity:1;transform:scale(1)}}.flashcard-3d-stage{perspective:1200px;justify-content:center;align-items:center;width:100%;display:flex}.flashcard-3d-card{width:100%;max-width:660px;height:400px;transform-style:preserve-3d;cursor:pointer;transition:transform .6s cubic-bezier(.4,0,.2,1);position:relative}.flashcard-3d-card.flipped{transform:rotateY(180deg)}.flashcard-3d-face{backface-visibility:hidden;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);background:#1e293bbf;border-radius:24px;flex-direction:column;justify-content:space-between;padding:40px;display:flex;position:absolute;inset:0;box-shadow:0 25px 50px -12px #0009,0 0 0 1px #ffffff1f}.flashcard-3d-face.back{background:#1e1b4bd9;border:1px solid #818cf859;transform:rotateY(180deg);box-shadow:0 25px 50px -12px #4f46e54d,0 0 0 1px #818cf833}.quiz-option-card{-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:#1e293b99;border:1px solid #ffffff1f;transition:all .2s cubic-bezier(.16,1,.3,1)}.quiz-option-card:hover{background:#312e8180;border-color:#6366f199;transform:translateY(-2px)}@keyframes shakeError{0%,to{transform:translate(0)}20%,60%{transform:translate(-8px)}40%,80%{transform:translate(8px)}}.animate-shake{animation:.4s ease-in-out shakeError}