@import url("https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap");:root,[data-theme=deep-blue]{--bg-primary:#0a0e1a;--bg-secondary:#111827;--bg-tertiary:#1a2235;--bg-card:rgba(26,34,53,0.7);--bg-hover:rgba(59,130,246,0.1);--text-primary:#f0f4f8;--text-secondary:#94a3b8;--text-muted:#64748b;--accent:#6366f1;--accent-hover:#818cf8;--accent-glow:rgba(99,102,241,0.3);--accent-rgb:99,102,241;--success:#22c55e;--warning:#f59e0b;--danger:#ef4444;--border:rgba(148,163,184,0.12);--border-hover:rgba(148,163,184,0.25);--glass:rgba(255,255,255,0.03);--glass-border:rgba(255,255,255,0.08);--shadow:0 8px 32px rgba(0,0,0,0.3);--shadow-lg:0 20px 60px rgba(0,0,0,0.4);--radius:12px;--radius-sm:8px;--radius-lg:16px;--auth-gradient:linear-gradient(135deg,#0a0e1a,#1a1040 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50%,#1a1008);--auth-title-gradient:linear-gradient(135deg,#fef3c7,#f97316);--btn-gradient:linear-gradient(135deg,#f97316,#eab308);--user-bubble-gradient:linear-gradient(135deg,#f97316,#eab308)}[data-theme=pure-black]{--bg-primary:#000000;--bg-secondary:#0a0a0a;--bg-tertiary:#141414;--bg-card:rgba(20,20,20,0.8);--bg-hover:rgba(160,160,160,0.08);--text-primary:#e5e5e5;--text-secondary:#a0a0a0;--text-muted:#666666;--accent:#a0a0a0;--accent-hover:#c0c0c0;--accent-glow:rgba(160,160,160,0.2);--accent-rgb:160,160,160;--success:#22c55e;--warning:#f59e0b;--danger:#ef4444;--border:rgba(255,255,255,0.08);--border-hover:rgba(255,255,255,0.15);--glass:rgba(255,255,255,0.02);--glass-border:rgba(255,255,255,0.06);--shadow:0 8px 32px rgba(0,0,0,0.6);--shadow-lg:0 20px 60px rgba(0,0,0,0.7);--radius:12px;--radius-sm:8px;--radius-lg:16px;--auth-gradient:linear-gradient(135deg,#000000,#0a0a0a 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center/cover;--auth-title-gradient:linear-gradient(135deg,#5c4b4b,#8f6742);--btn-gradient:linear-gradient(135deg,#a67c52,#8f6742);--user-bubble-gradient:linear-gradient(135deg,#d2b48c,#a67c52)}[data-theme=vintage-stickers]{--bg-primary:#fdfbf7 url(/themes/vintage_stickers.png) center/cover fixed;--bg-secondary:#f6efe9;--bg-tertiary:#eee4dc;--bg-card:rgba(253,251,247,0.85);--bg-hover:rgba(216,180,185,0.15);--text-primary:#4a4040;--text-secondary:#6b5c5c;--text-muted:#9c8a8a;--accent:#d49a9f;--accent-hover:#c48288;--accent-glow:rgba(212,154,159,0.25);--accent-rgb:212,154,159;--success:#65a385;--warning:#eab308;--danger:#ef6461;--border:rgba(212,154,159,0.15);--border-hover:rgba(212,154,159,0.25);--glass:rgba(253,251,247,0.7);--glass-border:rgba(212,154,159,0.1);--shadow:0 8px 32px rgba(74,64,64,0.06);--shadow-lg:0 20px 60px rgba(74,64,64,0.1);--radius:12px;--radius-sm:8px;--radius-lg:16px;--auth-gradient:linear-gradient(135deg,rgba(253,251,247,0.9),rgba(246,239,233,0.9)),url(/themes/vintage_stickers.png) 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0,transparent 50%),radial-gradient(ellipse at 70% 20%,rgba(139,92,246,.06) 0,transparent 40%);animation:float 20s ease-in-out infinite}@keyframes float{0%,to{transform:translate(0) rotate(0deg)}50%{transform:translate(-20px,-30px) rotate(2deg)}}.auth-card{position:relative;width:420px;padding:48px;background:var(--bg-card);-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border:1px solid var(--glass-border);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg)}.auth-card h1{font-size:28px;font-weight:700;text-align:center;margin-bottom:8px;background:var(--auth-title-gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.auth-card .subtitle{text-align:center;color:var(--text-secondary);font-size:14px;margin-bottom:32px}.form-group{margin-bottom:20px}.form-group label{display:block;font-size:13px;font-weight:500;color:var(--text-secondary);margin-bottom:6px}.form-group input{width:100%;padding:12px 16px;background:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius-sm);color:var(--text-primary);font-size:14px;font-family:inherit;transition:border-color .2s,box-shadow .2s;outline:none}.form-group input:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-glow)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 24px;font-size:14px;font-weight:600;font-family:inherit;border:none;border-radius:var(--radius-sm);cursor:pointer;transition:all .2s;text-decoration:none}.btn-primary{width:100%;background:var(--btn-gradient);color:white}.btn-primary:hover{transform:translateY(-1px);box-shadow:0 4px 20px var(--accent-glow)}.btn-primary:disabled{opacity:.6;cursor:not-allowed;transform:none}.btn-ghost{background:transparent;color:var(--text-secondary);padding:8px 16px}.btn-ghost:hover{color:var(--text-primary);background:var(--bg-hover)}.btn-sm{padding:6px 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.amount{color:var(--warning);font-weight:700}.user-menu{display:flex;align-items:center;gap:8px;color:var(--text-secondary);font-size:13px}.upload-zone{border:2px dashed var(--border);border-radius:var(--radius-lg);padding:48px;text-align:center;margin-bottom:32px;transition:all .3s;cursor:pointer;background:var(--glass)}.upload-zone.dragover,.upload-zone:hover{border-color:var(--accent);background:rgba(99,102,241,.05)}.upload-zone .icon{font-size:48px;margin-bottom:16px}.upload-zone h3{font-size:16px;font-weight:600;margin-bottom:8px}.upload-zone p{font-size:13px;color:var(--text-muted)}.upload-progress{margin-top:16px;width:200px;height:4px;background:var(--bg-secondary);border-radius:2px;margin-left:auto;margin-right:auto;overflow:hidden}.upload-progress .bar{height:100%;background:var(--btn-gradient);border-radius:2px;animation:progress 1.5s ease-in-out infinite}@keyframes progress{0%{width:0}50%{width:70%}to{width:100%}}.doc-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));grid-gap:16px;gap:16px}.doc-card{padding:20px;background:var(--bg-card);border:1px solid var(--glass-border);border-radius:var(--radius);cursor:pointer;transition:all .3s;position:relative}.doc-card:hover{border-color:var(--accent);transform:translateY(-2px);box-shadow:0 8px 24px rgba(99,102,241,.15)}.doc-card .doc-icon{font-size:32px;margin-bottom:12px}.doc-card h3{font-size:15px;font-weight:600;margin-bottom:8px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.doc-card .doc-meta{font-size:12px;color:var(--text-muted);display:flex;gap:12px}.doc-card .delete-btn{position:absolute;top:12px;right:12px;opacity:0;background:none;border:none;color:var(--text-muted);cursor:pointer;font-size:16px;transition:all .2s}.doc-card:hover .delete-btn{opacity:1}.doc-card .delete-btn:hover{color:var(--danger)}.empty-state{text-align:center;padding:60px 20px;color:var(--text-muted)}.empty-state .icon{font-size:48px;margin-bottom:16px}.reader-layout{display:flex;height:100dvh;width:100vw;position:fixed;top:0;left:0;overflow:hidden;overscroll-behavior:none}.pdf-toolbar .back-btn{display:flex;align-items:center;gap:6px;background:none;border:none;color:var(--text-secondary);cursor:pointer;font-size:13px;font-family:inherit;transition:color .2s;padding:4px 8px}.pdf-toolbar .back-btn:hover{color:var(--text-primary)}.chat-top-bar{justify-content:space-between;padding:10px 14px;border-bottom:1px solid var(--border);background:var(--bg-tertiary);gap:8px;flex-wrap:nowrap}.chat-top-bar,.chat-top-left{display:flex;align-items:center}.chat-top-left{gap:10px;min-width:0;flex-shrink:1}.chat-top-right{display:flex;align-items:center;gap:6px;flex-shrink:0}.credits-inline{display:flex;align-items:center;gap:4px;font-size:12px;color:var(--text-muted)}.credits-inline 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8px;border-radius:4px;transition:all .2s}.pdf-toolbar button:hover{color:var(--text-primary);background:var(--bg-hover)}.pdf-toolbar button:disabled{opacity:.3;cursor:not-allowed}.pdf-toolbar .page-info{font-size:13px;color:var(--text-secondary);min-width:80px;text-align:center}.pdf-scroll-area{flex:1 1;overflow:auto;padding:20px;touch-action:pan-x pan-y;overscroll-behavior:contain}.pdf-page-wrapper,.pdf-scroll-area{position:relative;-webkit-user-select:none;-moz-user-select:none;user-select:none}.pdf-page-wrapper{box-shadow:var(--shadow);border-radius:4px;overflow:visible}.pdf-zoom-wrapper{display:flex;flex-direction:column;align-items:center;gap:16px;width:max-content;min-width:100%;margin:0 auto;transform-origin:0 0;will-change:transform}.react-pdf__Page__textContent{position:absolute!important;top:0;left:0;right:0;bottom:0;-webkit-user-select:none;-moz-user-select:none;user-select:none}.react-pdf__Page__textContent span,.textLayer span{color:transparent;-webkit-user-select:text;-moz-user-select:text;user-select:text}.pdf-container ::selection{background:transparent!important}.react-pdf__Page__textContent mark::selection,.react-pdf__Page__textContent span::selection,.textLayer mark::selection,.textLayer span::selection{background:transparent!important;color:transparent!important}.react-pdf__Page__textContent mark[data-hl],.textLayer mark[data-hl]{color:transparent;padding:0;display:inline;background:inherit}.react-pdf__Page__annotations{display:block}.selection-overlay{position:absolute;top:0;left:0;width:100%;height:100%;pointer-events:none;z-index:10}.selection-highlight-rect{position:absolute;background:var(--highlight-color,rgba(255,255,0,.35));border-radius:2px;pointer-events:none;mix-blend-mode:multiply}.selection-toolbar{position:absolute;z-index:1000;background:var(--bg-secondary);border:1px solid var(--border-hover);border-radius:var(--radius);box-shadow:0 8px 32px rgba(0,0,0,.45);padding:8px 12px;display:flex;flex-direction:column;gap:8px;min-width:320px}.selection-toolbar.pop-top{animation:popInToolbarTop .15s ease-out}.selection-toolbar.pop-bottom{animation:popInToolbarBottom .15s ease-out}.st-note-row{display:flex;align-items:center}.toolbar-note-input{width:100%;background:var(--bg-tertiary);border:1px solid var(--border);border-radius:var(--radius-sm);padding:6px 10px;color:var(--text-primary);font-size:13px;font-family:inherit;outline:none;transition:border-color .2s}.toolbar-note-input:focus{border-color:var(--accent)}.toolbar-note-input::placeholder{color:var(--text-muted)}.st-actions-row{justify-content:space-between;gap:8px}.st-actions-row,.st-colors{display:flex;align-items:center}.st-colors{gap:4px}.color-dot{width:18px;height:18px;border-radius:50%;border:2px solid transparent;cursor:pointer;transition:all .15s;flex-shrink:0;padding:0}.color-dot:hover{transform:scale(1.15)}.color-dot.active{border-color:var(--text-primary);box-shadow:0 0 0 2px var(--bg-secondary)}.st-buttons{display:flex;align-items:center;gap:6px}.toolbar-action-btn{display:flex;align-items:center;gap:5px;padding:5px 10px;border:1px solid var(--border);border-radius:6px;background:var(--bg-tertiary);color:var(--text-secondary);font-size:12px;font-family:inherit;font-weight:500;cursor:pointer;transition:all .15s;white-space:nowrap}.toolbar-action-btn:hover{background:var(--bg-hover);border-color:var(--accent);color:var(--text-primary)}.toolbar-action-btn.highlight-btn{background:rgba(255,235,59,.15);border-color:rgba(255,235,59,.3);color:#fdd835}.toolbar-action-btn.highlight-btn:hover{background:rgba(255,235,59,.25)}.toolbar-action-btn.ask-ai-btn{background:rgba(99,102,241,.12);border-color:rgba(99,102,241,.3);color:var(--accent-hover)}.toolbar-action-btn.ask-ai-btn:hover{background:rgba(99,102,241,.22)}.pdf-highlight-rect{position:absolute;opacity:.4;border-radius:1px;cursor:pointer;transition:opacity 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