:root{--bg-primary: #0a0a0f;--bg-secondary: #111118;--bg-tertiary: #1a1a24;--bg-card: rgba(20, 20, 32, .7);--bg-card-hover: rgba(30, 30, 48, .8);--bg-glass: rgba(255, 255, 255, .03);--bg-glass-hover: rgba(255, 255, 255, .06);--text-primary: #f0f0f5;--text-secondary: #a0a0b8;--text-muted: #6a6a82;--text-accent: #c8b6ff;--accent-primary: #7c5cff;--accent-secondary: #5ce1e6;--accent-tertiary: #ff6bcb;--accent-success: #4ade80;--accent-warning: #fbbf24;--accent-danger: #f87171;--gradient-primary: linear-gradient(135deg, #7c5cff 0%, #5ce1e6 100%);--gradient-secondary: linear-gradient(135deg, #ff6bcb 0%, #7c5cff 100%);--gradient-warm: linear-gradient(135deg, #fbbf24 0%, #ff6bcb 100%);--gradient-bg: radial-gradient(ellipse at 20% 50%, rgba(124, 92, 255, .08) 0%, transparent 50%), radial-gradient(ellipse at 80% 20%, rgba(92, 225, 230, .06) 0%, transparent 50%), radial-gradient(ellipse at 50% 80%, rgba(255, 107, 203, .05) 0%, transparent 50%);--border-color: rgba(255, 255, 255, .06);--border-color-hover: rgba(255, 255, 255, .12);--border-accent: rgba(124, 92, 255, .3);--space-xs: .25rem;--space-sm: .5rem;--space-md: 1rem;--space-lg: 1.5rem;--space-xl: 2rem;--space-2xl: 3rem;--space-3xl: 4rem;--font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--font-mono: "JetBrains Mono", "Fira Code", monospace;--font-size-xs: .75rem;--font-size-sm: .875rem;--font-size-md: 1rem;--font-size-lg: 1.125rem;--font-size-xl: 1.25rem;--font-size-2xl: 1.5rem;--font-size-3xl: 2rem;--font-size-4xl: 2.5rem;--font-size-5xl: 3.5rem;--radius-sm: .5rem;--radius-md: .75rem;--radius-lg: 1rem;--radius-xl: 1.5rem;--radius-full: 9999px;--shadow-sm: 0 2px 8px rgba(0, 0, 0, .3);--shadow-md: 0 4px 16px rgba(0, 0, 0, .4);--shadow-lg: 0 8px 32px rgba(0, 0, 0, .5);--shadow-glow: 0 0 30px rgba(124, 92, 255, .15);--shadow-glow-lg: 0 0 60px rgba(124, 92, 255, .2);--transition-fast: .15s cubic-bezier(.4, 0, .2, 1);--transition-base: .25s cubic-bezier(.4, 0, .2, 1);--transition-slow: .4s cubic-bezier(.4, 0, .2, 1);--transition-spring: .5s cubic-bezier(.34, 1.56, .64, 1)}*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}html{font-size:16px;scroll-behavior:smooth;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{font-family:var(--font-sans);background-color:var(--bg-primary);color:var(--text-primary);line-height:1.6;min-height:100vh;overflow-x:hidden}#root{min-height:100vh;position:relative}::-webkit-scrollbar{width:6px;height:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:#ffffff1a;border-radius:var(--radius-full)}::-webkit-scrollbar-thumb:hover{background:#fff3}h1,h2,h3,h4,h5,h6{font-weight:700;line-height:1.2;color:var(--text-primary)}a{color:var(--accent-primary);text-decoration:none;transition:color var(--transition-fast)}a:hover{color:var(--accent-secondary)}.gradient-text{background:var(--gradient-primary);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.gradient-text-secondary{background:var(--gradient-secondary);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.glass{background:var(--bg-glass);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);border:1px solid var(--border-color)}.glass-card{background:var(--bg-card);backdrop-filter:blur(24px);-webkit-backdrop-filter:blur(24px);border:1px solid var(--border-color);border-radius:var(--radius-lg);transition:all var(--transition-base)}.glass-card:hover{background:var(--bg-card-hover);border-color:var(--border-color-hover);box-shadow:var(--shadow-glow)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-sm);padding:.75rem 1.5rem;border:none;border-radius:var(--radius-md);font-family:var(--font-sans);font-size:var(--font-size-md);font-weight:600;cursor:pointer;transition:all var(--transition-base);text-decoration:none;line-height:1;position:relative;overflow:hidden}.btn-primary{background:var(--gradient-primary);color:#fff;box-shadow:var(--shadow-sm),0 0 20px #7c5cff33}.btn-primary:hover{transform:translateY(-2px);box-shadow:var(--shadow-md),0 0 30px #7c5cff59}.btn-primary:active{transform:translateY(0)}.btn-secondary{background:var(--bg-glass);color:var(--text-primary);border:1px solid var(--border-color);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.btn-secondary:hover{background:var(--bg-glass-hover);border-color:var(--border-color-hover);transform:translateY(-1px)}.btn-ghost{background:transparent;color:var(--text-secondary);padding:.5rem}.btn-ghost:hover{color:var(--text-primary);background:var(--bg-glass)}.btn-icon{width:2.5rem;height:2.5rem;padding:0;border-radius:var(--radius-md)}.btn-lg{padding:1rem 2rem;font-size:var(--font-size-lg);border-radius:var(--radius-lg)}.btn:disabled{opacity:.5;cursor:not-allowed;transform:none!important}.input,.textarea{width:100%;padding:.75rem 1rem;background:var(--bg-glass);border:1px solid var(--border-color);border-radius:var(--radius-md);color:var(--text-primary);font-family:var(--font-sans);font-size:var(--font-size-md);transition:all var(--transition-fast);outline:none}.input:focus,.textarea:focus{border-color:var(--accent-primary);box-shadow:0 0 0 3px #7c5cff26}.input::placeholder,.textarea::placeholder{color:var(--text-muted)}.textarea{resize:vertical;min-height:120px;line-height:1.6}.label{display:block;font-size:var(--font-size-sm);font-weight:600;color:var(--text-secondary);margin-bottom:var(--space-sm);text-transform:uppercase;letter-spacing:.05em}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes fadeInUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeInDown{0%{opacity:0;transform:translateY(-20px)}to{opacity:1;transform:translateY(0)}}@keyframes scaleIn{0%{opacity:0;transform:scale(.95)}to{opacity:1;transform:scale(1)}}@keyframes float{0%,to{transform:translateY(0)}50%{transform:translateY(-10px)}}@keyframes pulse-glow{0%,to{box-shadow:0 0 20px #7c5cff1a}50%{box-shadow:0 0 40px #7c5cff40}}@keyframes gradient-shift{0%{background-position:0% 50%}50%{background-position:100% 50%}to{background-position:0% 50%}}@keyframes 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ul,.markdown-body ol{margin:.75rem 0;padding-left:1.5rem}.markdown-body li{margin:.35rem 0}.markdown-body li::marker{color:var(--accent-primary)}.markdown-body blockquote{border-left:3px solid var(--accent-primary);padding:.5rem 1rem;margin:1rem 0;background:var(--bg-glass);border-radius:0 var(--radius-sm) var(--radius-sm) 0;color:var(--text-secondary)}.markdown-body code{font-family:var(--font-mono);font-size:.9em;background:#7c5cff1a;padding:.15em .4em;border-radius:4px;color:var(--accent-secondary)}.markdown-body pre{margin:1rem 0;border-radius:var(--radius-md);overflow:hidden}.markdown-body pre code{background:none;padding:0;color:inherit}.markdown-body table{width:100%;border-collapse:collapse;margin:1rem 0;font-size:var(--font-size-sm)}.markdown-body th{background:var(--bg-tertiary);padding:.75rem 1rem;text-align:left;font-weight:600;border-bottom:2px solid var(--border-color);color:var(--text-accent)}.markdown-body td{padding:.6rem 1rem;border-bottom:1px solid var(--border-color)}.markdown-body tr:hover td{background:var(--bg-glass)}.markdown-body hr{border:none;height:1px;background:var(--border-color);margin:2rem 0}.markdown-body strong{color:var(--text-primary);font-weight:700}.markdown-body em{color:var(--text-accent)}.markdown-body .katex-display{overflow-x:auto;overflow-y:hidden;padding:.5rem 0}.app{position:relative;min-height:100vh;z-index:1}.app-content{position:relative;z-index:1;min-height:100vh}.landing{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:flex-start;padding:calc(var(--space-3xl) + 1rem) var(--space-xl) var(--space-2xl);position:relative}.landing-main{width:100%;max-width:1080px;display:flex;flex-direction:column;align-items:center;gap:var(--space-xl)}.landing-section{width:100%}.landing-header{text-align:center;margin-bottom:var(--space-md);animation:fadeInDown .8s ease-out}.landing-icon{font-size:3.5rem;margin-bottom:var(--space-md);display:block;animation:float 3s ease-in-out infinite}.landing-title{font-size:var(--font-size-5xl);font-weight:900;letter-spacing:-.03em;margin-bottom:var(--space-sm);background:var(--gradient-primary);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;background-size:200% 200%;animation:gradient-shift 4s ease infinite}.landing-subtitle{font-size:var(--font-size-xl);color:var(--text-secondary);font-weight:400;max-width:760px;margin:0 auto}.landing-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:var(--space-lg);max-width:1080px;width:100%;margin-inline:auto}.mode-card{position:relative;padding:var(--space-xl);border-radius:var(--radius-xl);background:#14142085;backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border:1px solid rgba(255,255,255,.08);cursor:pointer;transition:all var(--transition-base);overflow:hidden;text-align:center;animation:fadeInUp .6s ease-out backwards}.mode-card:nth-child(1){animation-delay:.1s}.mode-card:nth-child(2){animation-delay:.2s}.mode-card:nth-child(3){animation-delay:.3s}.mode-card:before{content:"";position:absolute;top:0;left:0;right:0;height:3px;border-radius:var(--radius-xl) var(--radius-xl) 0 0;opacity:0;transition:opacity var(--transition-base)}.mode-card:hover:before{opacity:1}.mode-card:hover{background:var(--bg-card-hover);border-color:var(--border-color-hover);transform:translateY(-6px);box-shadow:var(--shadow-glow-lg)}.mode-card.understand:before{background:var(--gradient-primary)}.mode-card.exam:before{background:var(--gradient-warm)}.mode-card.custom:before{background:var(--gradient-secondary)}.mode-card-icon{font-size:2.5rem;margin-bottom:var(--space-md);display:block}.mode-card-title{font-size:var(--font-size-xl);font-weight:700;margin-bottom:var(--space-sm)}.mode-card.understand .mode-card-title{color:#7c5cff}.mode-card.exam .mode-card-title{color:#fbbf24}.mode-card.custom .mode-card-title{color:#ff6bcb}.mode-card-desc{font-size:var(--font-size-sm);color:var(--text-secondary);line-height:1.5}.landing-settings{position:fixed;top:var(--space-lg);right:max(var(--space-lg),calc((100vw - 1080px) / 2 + var(--space-md)));z-index:10;display:flex;align-items:center;gap:var(--space-sm)}.api-status{font-size:var(--font-size-xs);padding:.35rem .75rem;border-radius:var(--radius-full);display:flex;align-items:center;gap:.35rem;font-weight:500}.api-status.connected{background:#4ade801a;color:var(--accent-success);border:1px solid rgba(74,222,128,.2)}.api-status.disconnected{background:#f871711a;color:var(--accent-danger);border:1px solid rgba(248,113,113,.2)}.api-status-dot{width:6px;height:6px;border-radius:50%}.api-status.connected .api-status-dot{background:var(--accent-success);box-shadow:0 0 6px var(--accent-success)}.api-status.disconnected .api-status-dot{background:var(--accent-danger)}.section-label{font-size:var(--font-size-xs);text-transform:uppercase;letter-spacing:.12em;color:var(--text-muted);font-weight:600;margin-bottom:var(--space-md);text-align:center}.features-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--space-md);max-width:1080px;width:100%;margin-inline:auto;margin-top:var(--space-sm);animation:fadeInUp .6s ease-out .4s backwards}.feature-item{display:flex;align-items:flex-start;gap:var(--space-sm);padding:var(--space-md);border-radius:var(--radius-lg);background:#14142080;backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border:1px solid rgba(255,255,255,.08)}.feature-icon-wrap{flex-shrink:0;width:32px;height:32px;display:flex;align-items:center;justify-content:center;border-radius:var(--radius-md);background:#7c5cff1a;color:#7c5cff}.feature-title{font-size:var(--font-size-sm);font-weight:600;color:var(--text-primary);margin-bottom:2px}.feature-desc{font-size:var(--font-size-xs);color:var(--text-secondary);line-height:1.4}.diff-section{animation:fadeInUp .6s ease-out .5s backwards}.diff-banner{position:relative;max-width:1080px;width:100%;margin-inline:auto;padding:clamp(1.5rem,3vw,2.5rem);border-radius:var(--radius-xl);border:1px solid rgba(124,92,255,.25);background:radial-gradient(circle at 10% 30%,rgba(124,92,255,.14),transparent 50%),radial-gradient(circle at 90% 70%,rgba(92,225,230,.1),transparent 40%),#0e0e1899;backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);box-shadow:0 8px 40px #7c5cff14;overflow:hidden}.diff-heading{font-size:clamp(1.5rem,3vw,2rem);font-weight:800;background:var(--gradient-primary);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:var(--space-sm)}.diff-lead{font-size:var(--font-size-md);color:var(--text-secondary);line-height:1.65;max-width:680px;margin-bottom:var(--space-xl)}.diff-lead strong{color:var(--text-primary)}.diff-cols{display:grid;grid-template-columns:1fr 1fr;gap:var(--space-lg)}.diff-col{padding:var(--space-lg);border-radius:var(--radius-lg);border:1px solid rgba(255,255,255,.08)}.diff-col-them{background:#f871710f;border-color:#f8717126}.diff-col-us{background:#4ade800f;border-color:#4ade802e}.diff-col-label{font-size:var(--font-size-xs);text-transform:uppercase;letter-spacing:.1em;font-weight:700;margin-bottom:var(--space-md)}.diff-col-them .diff-col-label{color:var(--accent-danger)}.diff-col-us .diff-col-label{color:var(--accent-success)}.diff-col ul{list-style:none;padding:0;display:flex;flex-direction:column;gap:.6rem}.diff-col li{font-size:var(--font-size-sm);color:var(--text-secondary);line-height:1.45;padding-left:1.4rem;position:relative}.diff-col-them li:before{content:"✕";position:absolute;left:0;color:var(--accent-danger);font-weight:700;font-size:.75rem;top:2px}.diff-col-us li:before{content:"✓";position:absolute;left:0;color:var(--accent-success);font-weight:700;font-size:.85rem;top:1px}.landing-footer{margin-top:var(--space-sm);text-align:center;color:var(--text-muted);font-size:var(--font-size-xs);animation:fadeIn 1s ease-out .5s backwards}.landing-footer a{color:var(--text-secondary)}@media(max-width:768px){.landing{padding:calc(var(--space-3xl) + .5rem) var(--space-md) var(--space-xl)}.landing-main{gap:var(--space-lg)}.landing-settings{right:var(--space-md)}.landing-cards,.features-grid{grid-template-columns:1fr;max-width:100%}.diff-cols{grid-template-columns:1fr}.diff-heading{font-size:1.4rem}.landing-title{font-size:var(--font-size-3xl)}.landing-subtitle{font-size:var(--font-size-md)}}.file-upload{margin-bottom:var(--space-lg)}.dropzone{border:2px dashed var(--border-color);border-radius:var(--radius-lg);padding:var(--space-xl);text-align:center;cursor:pointer;transition:all var(--transition-base);position:relative;overflow:hidden}.dropzone:hover{border-color:var(--accent-primary);background:#7c5cff08}.dropzone.drag-over{border-color:var(--accent-primary);background:#7c5cff0f;box-shadow:0 0 30px #7c5cff1a}.dropzone.drag-over:after{content:"";position:absolute;inset:0;border-radius:inherit;animation:pulse-glow 1s ease-in-out infinite;pointer-events:none}.dropzone-icon{color:var(--text-muted);margin-bottom:var(--space-sm);transition:color var(--transition-base)}.dropzone:hover .dropzone-icon,.dropzone.drag-over .dropzone-icon{color:var(--accent-primary)}.dropzone-text{font-size:var(--font-size-md);color:var(--text-secondary);margin-bottom:var(--space-xs)}.dropzone-hint{font-size:var(--font-size-xs);color:var(--text-muted)}.file-list{margin-top:var(--space-md);display:flex;flex-direction:column;gap:var(--space-sm)}.file-item{display:flex;align-items:center;gap:var(--space-sm);padding:.6rem .75rem;background:var(--bg-glass);border:1px solid var(--border-color);border-radius:var(--radius-md);animation:fadeInUp .3s ease-out}.file-item-icon{color:var(--accent-primary);flex-shrink:0}.file-item-info{flex:1;min-width:0}.file-item-name{font-size:var(--font-size-sm);font-weight:500;color:var(--text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.file-item-size{font-size:var(--font-size-xs);color:var(--text-muted)}.file-item-remove{flex-shrink:0;color:var(--text-muted);cursor:pointer;transition:color var(--transition-fast);background:none;border:none;padding:.25rem;display:flex;align-items:center}.file-item-remove:hover{color:var(--accent-danger)}.file-upload-hidden{display:none}.input-page{min-height:100vh;padding:var(--space-xl);max-width:800px;margin:0 auto}.input-page-header{display:flex;align-items:center;gap:var(--space-md);margin-bottom:var(--space-2xl);animation:fadeInDown .5s ease-out}.back-btn{flex-shrink:0}.input-page-title-section{flex:1}.input-page-mode-label{font-size:var(--font-size-xs);text-transform:uppercase;letter-spacing:.1em;font-weight:600;margin-bottom:var(--space-xs)}.input-page-mode-label.understand{color:#7c5cff}.input-page-mode-label.exam{color:#fbbf24}.input-page-mode-label.custom{color:#ff6bcb}.input-page-title{font-size:var(--font-size-2xl);font-weight:700}.input-section{margin-bottom:var(--space-xl);animation:fadeInUp .5s ease-out backwards}.input-section:nth-child(2){animation-delay:.05s}.input-section:nth-child(3){animation-delay:.1s}.input-section:nth-child(4){animation-delay:.15s}.input-section:nth-child(5){animation-delay:.2s}.input-section:nth-child(6){animation-delay:.25s}.input-section-header{display:flex;align-items:center;gap:var(--space-sm);margin-bottom:var(--space-sm)}.input-section-icon{color:var(--accent-primary)}.section-divider{border:none;height:1px;background:var(--border-color);margin:var(--space-xl) 0}.input-actions{display:flex;gap:var(--space-md);justify-content:flex-end;padding-top:var(--space-lg);animation:fadeInUp .5s ease-out .3s backwards}.error-banner{background:#f871711a;border:1px solid rgba(248,113,113,.2);border-radius:var(--radius-md);padding:var(--space-md);color:var(--accent-danger);font-size:var(--font-size-sm);margin-bottom:var(--space-lg);display:flex;align-items:flex-start;gap:var(--space-sm);animation:fadeInUp .3s ease-out}.error-banner-icon{flex-shrink:0;margin-top:2px}.custom-prompt-textarea{min-height:160px}.no-api-key-warning{background:#fbbf2414;border:1px solid rgba(251,191,36,.2);border-radius:var(--radius-md);padding:var(--space-md);color:var(--accent-warning);font-size:var(--font-size-sm);margin-bottom:var(--space-lg);display:flex;align-items:center;gap:var(--space-sm);cursor:pointer;transition:all var(--transition-fast)}.no-api-key-warning:hover{background:#fbbf241f}.processing{min-height:100vh;display:flex;flex-direction:column;align-items:center;padding:var(--space-2xl) var(--space-xl)}.processing-header{text-align:center;margin-bottom:var(--space-2xl);animation:fadeInDown .6s ease-out}.processing-icon{font-size:4rem;display:block;margin-bottom:var(--space-md);animation:float 2.5s ease-in-out infinite}.processing-title{font-size:var(--font-size-2xl);font-weight:700;margin-bottom:var(--space-sm)}.processing-subtitle{font-size:var(--font-size-md);color:var(--text-secondary)}.processing-dots{display:flex;gap:6px;justify-content:center;margin:var(--space-lg) 0}.processing-dot{width:8px;height:8px;border-radius:50%;background:var(--accent-primary);animation:dot-bounce 1.4s ease-in-out infinite}.processing-dot:nth-child(1){animation-delay:0s}.processing-dot:nth-child(2){animation-delay:.2s}.processing-dot:nth-child(3){animation-delay:.4s}@keyframes dot-bounce{0%,80%,to{opacity:.3;transform:scale(.8)}40%{opacity:1;transform:scale(1.2)}}.streaming-preview{width:100%;max-width:800px;flex:1;animation:fadeInUp .6s ease-out .3s backwards}.streaming-preview-label{font-size:var(--font-size-xs);text-transform:uppercase;letter-spacing:.1em;color:var(--text-muted);margin-bottom:var(--space-sm);font-weight:600}.streaming-content{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);padding:var(--space-xl);max-height:60vh;overflow-y:auto;position:relative}.streaming-content:after{content:"▊";display:inline;animation:blink-cursor 1s step-end infinite;color:var(--accent-primary);font-weight:700}@keyframes blink-cursor{0%,to{opacity:1}50%{opacity:0}}.processing-tip{margin-top:var(--space-xl);max-width:500px;text-align:center;padding:var(--space-md);background:var(--bg-glass);border-radius:var(--radius-md);border:1px solid var(--border-color);animation:fadeIn 1s ease-out 1s backwards}.processing-tip-label{font-size:var(--font-size-xs);color:var(--accent-secondary);font-weight:600;text-transform:uppercase;letter-spacing:.1em;margin-bottom:var(--space-xs)}.processing-tip-text{font-size:var(--font-size-sm);color:var(--text-secondary);line-height:1.5}.file-warnings{width:100%;max-width:800px;margin-bottom:var(--space-lg);display:flex;flex-direction:column;gap:var(--space-xs);animation:fadeIn .4s 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ease-out}.output-read-progress{height:3px;width:100%;background:#ffffff0d}.output-read-progress-fill{height:100%;width:0;background:linear-gradient(90deg,#7c5cff,#5ce1e6);box-shadow:0 0 16px #7c5cff73;transition:width .12s linear}.output-header-info{flex:1;min-width:0}.output-header-mode{font-size:var(--font-size-xs);text-transform:uppercase;letter-spacing:.1em;font-weight:600;color:var(--accent-primary)}.output-header-topic{font-size:var(--font-size-lg);font-weight:700;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.output-header-actions{display:flex;gap:var(--space-sm);flex-shrink:0}.output-body{display:flex;flex:1}.output-sidebar{width:260px;flex-shrink:0;position:sticky;top:90px;height:calc(100vh - 90px);overflow-y:auto;border-right:1px solid var(--border-color);padding:var(--space-lg);animation:fadeIn .6s ease-out .3s 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var(--transition-fast);cursor:pointer;text-decoration:none;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-family:var(--font-sans)}.toc-link:hover{color:var(--text-primary);background:var(--bg-glass)}.toc-link.active{color:var(--accent-primary);background:#7c5cff14;border-left-color:var(--accent-primary);font-weight:500}.toc-link.depth-2{padding-left:1.5rem;font-size:var(--font-size-xs)}.toc-link.depth-3{padding-left:2.25rem;font-size:var(--font-size-xs)}.output-content{flex:1;padding:var(--space-2xl) var(--space-3xl);max-width:900px;min-width:0;animation:fadeInUp .5s ease-out}.study-hero{position:relative;padding:clamp(1.25rem,2.5vw,2rem);margin-bottom:var(--space-xl);overflow:hidden;border:1px solid rgba(255,255,255,.1)}.study-hero:before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 15% 20%,rgba(124,92,255,.22),transparent 45%),radial-gradient(circle at 85% 10%,rgba(92,225,230,.2),transparent 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#00000047;padding:clamp(1.05rem,2.2vw,2rem)}.output-content-shell .markdown-body>:first-child{margin-top:0}.output-content-shell .markdown-body>:last-child{margin-bottom:0}.callout{position:relative;border-left-width:4px;border-left-style:solid;border-radius:var(--radius-md);padding:.85rem 1rem;margin:1rem 0}.callout-note{border-left-color:#7c5cff;background:#7c5cff24}.callout-insight{border-left-color:#5ce1e6;background:#5ce1e61f}.callout-warning{border-left-color:#fbbf24;background:#fbbf241f}.callout-success{border-left-color:#4ade80;background:#4ade801f}.callout-priority{border-left-color:#f87171;background:#f8717121}.table-wrap{width:100%;overflow-x:auto;border-radius:var(--radius-md);border:1px solid rgba(255,255,255,.08);background:#ffffff05}.table-wrap table{margin:0}.output-stats-bar{display:flex;align-items:center;gap:var(--space-lg);padding:var(--space-xs) var(--space-xl);border-bottom:1px solid var(--border-color);background:#0a0a0f99;animation:fadeIn .4s ease-out .2s backwards}.output-stat{display:flex;align-items:center;gap:.3rem;font-size:var(--font-size-xs);color:var(--text-muted)}.output-search-bar{display:flex;align-items:center;gap:var(--space-sm);padding:var(--space-sm) var(--space-xl);border-bottom:1px solid var(--border-color);background:#0a0a0fb3;animation:fadeInDown .2s ease-out}.output-search-icon{color:var(--text-muted);flex-shrink:0}.output-search-input{flex:1;background:none;border:none;outline:none;color:var(--text-primary);font-family:var(--font-sans);font-size:var(--font-size-sm)}.output-search-input::placeholder{color:var(--text-muted)}.output-search-count{font-size:var(--font-size-xs);color:var(--text-muted);white-space:nowrap}.output-search-close{width:1.75rem;height:1.75rem}mark.search-highlight{background:#fbbf2473;color:inherit;border-radius:4px;padding:0 3px}.btn-ghost.active{color:var(--accent-primary);background:#7c5cff1a}.copy-toast{position:fixed;bottom:var(--space-xl);left:50%;transform:translate(-50%);background:var(--accent-success);color:#000;padding:.6rem 1.25rem;border-radius:var(--radius-full);font-size:var(--font-size-sm);font-weight:600;animation:fadeInUp .3s ease-out;z-index:100;box-shadow:0 4px 20px #4ade804d}@media(max-width:1024px){.output-sidebar{display:none}.output-content{padding:var(--space-xl)}}@media(max-width:768px){.study-hero{margin-bottom:var(--space-lg)}.study-hero-title{font-size:clamp(1.5rem,7vw,1.9rem)}.study-hero-meta{gap:.4rem}.hero-chip{font-size:.7rem;padding:.3rem .6rem}.output-content{padding:var(--space-md)}.output-header{flex-wrap:wrap}.output-header-actions{width:100%;justify-content:flex-end}.btn-label-desktop{display:none}.output-stats-bar{padding:var(--space-xs) var(--space-md)}.output-search-bar{padding:var(--space-sm) var(--space-md)}}@media print{.output-header,.output-read-progress,.output-stats-bar,.output-search-bar,.output-sidebar,.copy-toast,.bg-mesh{display:none!important}.output-page{min-height:auto}.output-body{display:block}.output-content{padding:0;max-width:100%}.study-hero{border:1px solid #ddd!important;background:#f8f8f8!important;box-shadow:none!important}.study-hero:before{display:none!important}.output-content-shell{border:none!important;background:transparent!important;box-shadow:none!important;padding:0!important}.table-wrap{border:1px solid #ddd!important;background:transparent!important}.markdown-body,.markdown-body h1,.markdown-body h2,.markdown-body h3,.markdown-body h4{color:#000}.markdown-body code{background:#f0f0f0;color:#333}.markdown-body blockquote{border-left-color:#666;color:#444}body{background:#fff}}.modal-overlay{position:fixed;inset:0;background:#0009;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);display:flex;align-items:center;justify-content:center;z-index:100;padding:var(--space-lg);animation:fadeIn .2s ease-out}.modal{background:var(--bg-secondary);border:1px solid var(--border-color);border-radius:var(--radius-xl);padding:var(--space-xl);width:100%;max-width:480px;animation:scaleIn .3s ease-out;position:relative}.modal-close{position:absolute;top:var(--space-md);right:var(--space-md)}.modal-title{font-size:var(--font-size-xl);font-weight:700;margin-bottom:var(--space-xs)}.modal-subtitle{font-size:var(--font-size-sm);color:var(--text-secondary);margin-bottom:var(--space-xl);line-height:1.5}.modal-subtitle a{color:var(--accent-secondary);text-decoration:underline;text-underline-offset:2px}.modal-settings .modal-subtitle,.settings-field{margin-bottom:var(--space-lg)}.settings-field .label{display:block;margin-bottom:var(--space-xs)}.field-hint{font-size:var(--font-size-xs);color:var(--text-secondary);margin-top:var(--space-xs)}.field-hint a{color:var(--accent-secondary);text-decoration:underline}.api-key-input-wrapper{position:relative;margin-bottom:0}.settings-field .api-key-input-wrapper{margin-bottom:0}.api-key-input-wrapper .input{padding-right:3rem;font-family:var(--font-mono);font-size:var(--font-size-sm)}.toggle-visibility{position:absolute;right:.5rem;top:50%;transform:translateY(-50%)}.modal-actions{display:flex;gap:var(--space-sm);justify-content:flex-end}.validation-msg{font-size:var(--font-size-sm);margin-bottom:var(--space-md);padding:.5rem .75rem;border-radius:var(--radius-sm);display:flex;align-items:center;gap:var(--space-sm)}.validation-msg.success{background:#4ade801a;color:var(--accent-success);border:1px solid rgba(74,222,128,.2)}.validation-msg.error{background:#f871711a;color:var(--accent-danger);border:1px solid rgba(248,113,113,.2)}.history-modal{max-width:560px;max-height:80vh;display:flex;flex-direction:column}.history-list{display:flex;flex-direction:column;gap:var(--space-sm);overflow-y:auto;max-height:50vh;padding-right:var(--space-xs)}.history-item{display:flex;align-items:center;gap:var(--space-md);padding:var(--space-md);background:var(--bg-glass);border:1px solid var(--border-color);border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition-fast)}.history-item:hover{background:var(--bg-glass-hover);border-color:var(--border-color-hover);transform:translate(2px)}.history-item-icon{flex-shrink:0;width:2rem;height:2rem;display:flex;align-items:center;justify-content:center;border-radius:var(--radius-sm);background:#7c5cff1a;color:var(--accent-primary)}.history-item-info{flex:1;min-width:0}.history-item-title{font-size:var(--font-size-sm);font-weight:600;color:var(--text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.history-item-meta{display:flex;align-items:center;gap:var(--space-sm);margin-top:2px;font-size:var(--font-size-xs);color:var(--text-muted)}.history-mode-tag{padding:1px 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