@import "https://fonts.googleapis.com/css2?family=Space+Grotesk:wght@400;500;600;700&family=Inter:wght@400;500;600&family=JetBrains+Mono:wght@400;500&family=Caveat:wght@500;600&display=swap";.landing-header{background:var(--bg-surface-glass);-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);border-bottom:1px solid #d8dee666;justify-content:space-between;align-items:center;padding:16px 40px;display:flex}.landing-nav-inner{justify-content:space-between;align-items:center;max-width:1200px;margin:0 auto;padding:16px 24px;display:flex}.landing-logo{font-family:var(--font-display,inherit);letter-spacing:-.03em;-webkit-user-select:none;user-select:none;align-items:center;font-size:1.5rem;font-weight:800;display:flex}.logo-tutor{color:#5a6b7b}.logo-gpt{color:#2563eb}.landing-nav-actions{align-items:center;gap:20px;display:flex}.nav-link-login{color:#5a6b7b;font-size:.95rem;font-weight:500;text-decoration:none;transition:color .2s}.nav-link-login:hover{color:#1a2733}.btn-nav{border-radius:var(--radius-sm);background-color:#2563eb;padding:8px 16px;font-weight:600}.btn-nav:hover{background-color:#1d4ed8}.landing-hero{justify-content:center;align-items:center;max-width:1200px;min-height:80vh;margin:0 auto;padding:180px 24px 100px;display:flex;position:relative;overflow:hidden}.hero-center{text-align:center;z-index:10;max-width:600px;position:relative}.landing-headline{color:#1a2733;letter-spacing:-.02em;margin-bottom:24px;font-size:4rem;font-weight:800;line-height:1.1}.landing-headline-accent{color:#2563eb}.landing-subheadline{color:#5a6b7b;margin-bottom:40px;font-size:1.15rem;line-height:1.6}.landing-subheadline strong{color:#1a2733;font-weight:600}.btn-cta{border-radius:var(--radius-sm);background-color:#2563eb;padding:16px 32px;font-size:1.1rem;box-shadow:0 4px 14px #2563eb4d}.btn-cta:hover{background-color:#1d4ed8;transform:translateY(-2px);box-shadow:0 6px 20px #2563eb66}.cta-arrow{margin-left:8px;transition:transform .2s}.btn-cta:hover .cta-arrow{transform:translate(4px)}.hero-illustrations{pointer-events:none;width:350px;position:absolute;top:0;bottom:0}.hero-left{left:0}.hero-right{right:0}.handwritten{color:#8899a6;font-family:Caveat,cursive,sans-serif;font-size:1.2rem;font-style:italic;position:absolute;transform:rotate(-10deg)}.handwritten-left{top:150px;left:40px}.handwritten-topright{top:140px;right:60px;transform:rotate(5deg)}.handwritten-midright{top:450px;right:30px;transform:rotate(-5deg)}.float-card{color:#1a2733;background:#fff;border-radius:12px;align-items:center;gap:12px;padding:12px 20px;font-size:.95rem;font-weight:600;animation:6s ease-in-out infinite float;display:flex;position:absolute;box-shadow:0 10px 30px #00000014}.float-card-pdf{animation-delay:0s;top:320px;left:20px;transform:rotate(-5deg)}.float-card-notes{animation-delay:.5s;top:390px;left:40px}.float-card-textbook{animation-delay:1s;top:460px;left:60px;transform:rotate(5deg)}.float-card-icon{border-radius:8px;justify-content:center;align-items:center;width:32px;height:32px;font-size:1.2rem;display:flex}.float-icon-red{color:#ff4a4a;background:#ffe8e8}.float-icon-blue{color:#4a90e2;background:#e8f2ff}.float-icon-purple{color:#9b51e0;background:#f0e8ff}.float-upload-btn{color:#fff;border-radius:var(--radius-sm);background:#2563eb;align-items:center;gap:8px;padding:12px 24px;font-weight:600;animation:7s ease-in-out .2s infinite float;display:flex;position:absolute;top:350px;left:160px;transform:rotate(-5deg);box-shadow:0 8px 24px #2563eb4d}.float-mascot{filter:drop-shadow(0 20px 30px #0000001a);font-size:8rem;animation:5s ease-in-out infinite float;position:absolute;top:200px;right:50px}.float-chat-bubble{color:#1a2733;background:#fff;border-radius:16px 16px 4px;padding:16px 20px;font-size:.95rem;font-weight:500;animation:6.5s ease-in-out .7s infinite float;position:absolute;top:350px;right:120px;box-shadow:0 10px 30px #00000014}.float-quiz-badge{color:#7b32c1;text-align:center;background:#f4ebff;border-radius:16px;padding:16px 24px;font-weight:700;animation:5.5s ease-in-out 1.2s infinite float;position:absolute;top:480px;right:80px;box-shadow:0 10px 30px #7b32c126}@keyframes float{0%,to{transform:translateY(0) rotate(var(--rot,0deg))}50%{transform:translateY(-15px) rotate(var(--rot,0deg))}}.float-card-pdf{--rot:-5deg}.float-card-textbook{--rot:5deg}.float-upload-btn{--rot:-5deg}.landing-features{z-index:10;grid-template-columns:repeat(3,1fr);gap:30px;max-width:1200px;margin:0 auto;padding:0 24px 100px;display:grid;position:relative}.feature-card{background:#fff;border:1px solid #d8dee64d;border-radius:20px;padding:40px 30px;transition:transform .3s,box-shadow .3s;box-shadow:0 4px 20px #0000000a}.feature-card:hover{transform:translateY(-8px);box-shadow:0 12px 30px #00000014}.feature-icon-wrapper{border-radius:16px;justify-content:center;align-items:center;width:64px;height:64px;margin-bottom:24px;font-size:1.8rem;display:flex}.feature-icon-blue{background:#e8f2ff}.feature-icon-green{background:#e6f7f4}.feature-icon-purple{background:#f4ebff}.feature-title{color:#1a2733;margin-bottom:12px;font-size:1.25rem;font-weight:700}.feature-desc{color:#5a6b7b;font-size:.95rem;line-height:1.6}.landing-footer{text-align:center;color:#8899a6;padding:40px 24px;font-size:.9rem}@media (width<=1100px){.hero-illustrations{display:none}.landing-hero{min-height:auto;padding:140px 24px 80px}.landing-headline{font-size:3rem}}@media (width<=800px){.landing-features{grid-template-columns:1fr;gap:20px}}.auth-page{background:var(--bg-primary);justify-content:center;align-items:center;min-height:100vh;padding:24px;display:flex}.auth-card{width:100%;max-width:420px;padding:40px 36px}.auth-header{text-align:center;margin-bottom:28px}.auth-logo{font-family:var(--font-display);color:var(--text-primary);margin-bottom:20px;font-size:1.25rem;font-weight:700;text-decoration:none;display:inline-block}.auth-title{margin-bottom:6px;font-size:1.5rem}.auth-subtitle{color:var(--text-secondary);font-size:.9rem}.auth-error{background:var(--error-light);color:var(--error);border-radius:var(--radius-md);border:1px solid var(--error);margin-bottom:16px;padding:10px 14px;font-size:.85rem}.auth-form{flex-direction:column;gap:18px;display:flex}.form-group{flex-direction:column;gap:6px;display:flex}.form-label{color:var(--text-secondary);text-transform:uppercase;letter-spacing:.04em;font-size:.8rem;font-weight:500}.auth-submit{width:100%;margin-top:4px;padding:12px;font-size:.95rem}.auth-switch{text-align:center;color:var(--text-secondary);margin-top:20px;font-size:.85rem}.auth-switch a{font-weight:500}.sidebar{width:var(--sidebar-width);background:var(--bg-surface-glass);-webkit-backdrop-filter:blur(16px);border-right:1px solid var(--border);z-index:50;flex-direction:column;height:100vh;transition:transform .3s cubic-bezier(.16,1,.3,1);display:flex;position:fixed;top:0;left:0}.sidebar-header{border-bottom:1px solid var(--border);padding:24px}.sidebar-logo{font-family:var(--font-display);color:var(--text-primary);justify-content:center;align-items:center;width:100%;font-size:1.25rem;font-weight:700;display:flex}.sidebar-nav{flex-direction:column;flex:1;gap:8px;padding:24px 16px;display:flex;overflow-y:auto}.sidebar-link{border-radius:var(--radius-md);color:var(--text-secondary);align-items:center;gap:12px;padding:12px 16px;font-weight:500;text-decoration:none;transition:all .2s;display:flex}.sidebar-link:hover{background:var(--bg-input);color:var(--text-primary)}.sidebar-link.active{background:var(--accent-light);color:var(--accent)}.sidebar-section{margin-top:24px}.sidebar-section-title{text-transform:uppercase;color:var(--text-secondary);letter-spacing:.05em;margin-bottom:8px;padding:0 16px;font-size:.75rem;font-weight:600}.small-link{flex:1;padding:8px 16px;font-size:.9rem}.sidebar-link-container{align-items:center;display:flex;position:relative}.sidebar-link-container .sidebar-link{width:100%}.sidebar-link-text{white-space:nowrap;text-overflow:ellipsis;flex:1;overflow:hidden}.sidebar-item-actions{background:var(--bg-surface);padding-left:4px;display:none;position:absolute;right:8px}.sidebar-link-container:hover .sidebar-item-actions{gap:4px;display:flex}.sidebar-link-container:hover .sidebar-item-actions,.sidebar-link-container:hover .sidebar-link.active~.sidebar-item-actions{background:0 0}.sidebar-link-container:hover .sidebar-item-actions{background:var(--bg-input)}.sidebar-link-container:hover .sidebar-link.active+.sidebar-item-actions{background:var(--accent-light)}.rename-btn-sidebar,.delete-btn-sidebar{color:var(--text-secondary);padding:4px;font-size:.8rem}.rename-btn-sidebar:hover{color:var(--accent)}.delete-btn-sidebar:hover{color:var(--error)}.sidebar-icon{font-size:1.2rem}.sidebar-footer{border-top:1px solid var(--border);padding:16px}.sidebar-user{align-items:center;gap:12px;margin-bottom:12px;padding:8px;display:flex}.user-avatar{background:var(--accent);color:#fff;border-radius:50%;justify-content:center;align-items:center;width:32px;height:32px;font-size:.9rem;font-weight:600;display:flex}.user-email{color:var(--text-secondary);white-space:nowrap;text-overflow:ellipsis;font-size:.85rem;overflow:hidden}.sidebar-actions{justify-content:space-between;display:flex}.app-layout{min-height:100vh;display:flex}.app-main{margin-left:var(--sidebar-width);flex:1;max-width:1200px;padding:32px 48px}@media (width<=768px){.sidebar{transform:translate(-100%)}.app-main{margin-left:0;padding:24px}}.loading-spinner-container{flex-direction:column;justify-content:center;align-items:center;gap:12px;padding:24px;display:flex}.loading-message{color:var(--text-secondary);font-size:.875rem}.page-header{margin-bottom:32px}.page-title{margin-bottom:8px;font-size:2rem}.page-subtitle{color:var(--text-secondary)}.section-title{font-size:1.25rem;font-family:var(--font-body);margin-bottom:16px}.dashboard-error{background:var(--error-light);color:var(--error);border-radius:var(--radius-md);border:1px solid var(--error);margin-bottom:24px;padding:12px 16px}.upload-section{margin-bottom:40px}.upload-form{flex-direction:column;gap:16px;display:flex}.upload-inputs{align-items:center;gap:12px;display:flex}.file-upload-label{cursor:pointer;white-space:nowrap;text-overflow:ellipsis;align-items:center;max-width:250px;display:flex;overflow:hidden}.upload-box{background:var(--bg-primary);border:1px dashed var(--border);box-shadow:none;padding:24px}.file-input{border:1px dashed var(--border);border-radius:var(--radius-md);background:var(--bg-input);flex:1;padding:8px}.text-input{flex:2}.sources-grid{grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:20px;padding-bottom:80px;display:grid}.source-card{cursor:pointer;border:2px solid #0000;flex-direction:column;transition:all .3s cubic-bezier(.16,1,.3,1);display:flex;position:relative}.source-card:hover{border-color:var(--border);transform:translateY(-4px);box-shadow:0 12px 24px -10px #0000001a}.source-card:active{transform:translateY(-2px)scale(.98)}.source-card.selected{border-color:var(--accent);background:var(--accent-light)}.source-card-header{justify-content:space-between;align-items:center;margin-bottom:12px;display:flex}.source-checkbox{width:18px;height:18px;accent-color:var(--accent);cursor:pointer}.delete-btn{color:var(--text-secondary);font-size:1rem}.delete-btn:hover{color:var(--error);background:var(--error-light)}.source-icon{text-align:center;margin-bottom:16px;font-size:2.5rem}.source-title{white-space:nowrap;text-overflow:ellipsis;margin-bottom:8px;font-size:1rem;font-weight:600;overflow:hidden}.source-meta{color:var(--text-secondary);flex:1;margin-bottom:12px;font-size:.8rem}.status-badge{border-radius:var(--radius-sm);text-transform:uppercase;align-self:flex-start;padding:4px 8px;font-size:.75rem;font-weight:600;display:inline-block}.status-badge.EMBEDDED{background:var(--success-light);color:var(--success)}.status-badge.PROCESSING{color:#d97706;background:#f59e0b1a}.status-badge.FAILED{background:var(--error-light);color:var(--error)}.empty-state{text-align:center;background:var(--bg-surface);border:1px dashed var(--border);border-radius:var(--radius-lg);color:var(--text-secondary);padding:60px 20px}.floating-action-bar{bottom:32px;left:calc(50% + (var(--sidebar-width) / 2));background:var(--bg-surface-glass);-webkit-backdrop-filter:blur(12px);border:1px solid var(--border);border-radius:var(--radius-pill);z-index:100;align-items:center;gap:24px;padding:12px 24px;animation:.3s cubic-bezier(.16,1,.3,1) forwards slideUp;display:flex;position:fixed;transform:translate(-50%);box-shadow:0 10px 25px -5px #0000001a,0 8px 10px -6px #0000001a}.selection-info{color:var(--text-primary);font-size:.95rem}.action-buttons{gap:12px;display:flex}@keyframes slideUp{0%{opacity:0;transform:translate(-50%,20px)}to{opacity:1;transform:translate(-50%)}}.card-actions{gap:8px;display:flex}.rename-btn{color:var(--text-secondary);font-size:.95rem}.rename-btn:hover{color:var(--accent);background:var(--accent-light)}.modal-overlay{-webkit-backdrop-filter:blur(8px);z-index:1000;background:#0f172a66;justify-content:center;align-items:center;display:flex;position:fixed;inset:0}.modal-content{background:var(--bg-surface);border-radius:var(--radius-lg);width:90%;max-width:400px;box-shadow:var(--shadow-lg);padding:32px;animation:.2s ease-out forwards modalFadeIn}.modal-content h3{color:var(--text-primary);margin-bottom:12px;font-size:1.25rem}.modal-content p{color:var(--text-secondary);margin-bottom:24px;font-size:.95rem}.modal-actions{justify-content:flex-end;gap:12px;display:flex}@keyframes modalFadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@media (width<=768px){.upload-inputs{flex-direction:column}.file-input,.text-input{width:100%}.floating-action-bar{justify-content:space-between;width:90%;padding:12px 16px;left:50%}}.chat-layout .app-main{flex-direction:column;max-width:none;height:100vh;padding:0;display:flex;position:relative}.chat-main-centered{flex-direction:column;justify-content:center;align-items:center;height:100vh;display:flex}.chat-header-bar{background:var(--bg-surface-glass);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--border);z-index:10;padding:16px 24px;position:sticky;top:0}.chat-header-bar h2{color:var(--text-primary);margin:0;font-size:1.1rem;font-weight:600}.chat-messages-container{flex-direction:column;flex:1;padding:24px 0 120px;display:flex;overflow-y:auto}.chat-empty-state{color:var(--text-secondary);text-align:center;flex-direction:column;flex:1;justify-content:center;align-items:center;display:flex}.chat-empty-state h2{color:var(--text-primary);margin-bottom:8px;font-size:1.75rem}.chat-message-row{gap:16px;width:100%;max-width:800px;margin:0 auto;padding:24px 20px;display:flex}.chat-avatar{border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:32px;height:32px;font-size:.85rem;font-weight:600;display:flex}.chat-message-row.user .chat-avatar{background:var(--bg-input);color:var(--text-primary)}.chat-message-row.assistant .chat-avatar{background:var(--accent);color:#fff}.chat-content{color:var(--text-primary);flex:1;font-size:1.05rem;line-height:1.7}.chat-content p{margin-bottom:16px}.chat-content p:last-child{margin-bottom:0}.chat-content pre{background:var(--bg-input);border-radius:var(--radius-sm);margin:12px 0;padding:12px;overflow-x:auto}.chat-content code{background:var(--bg-input);font-family:var(--font-mono);border-radius:4px;padding:2px 4px;font-size:.9em}.chat-content pre code{background:0 0;padding:0}.chat-content ul,.chat-content ol{margin:12px 0;padding-left:24px}.chat-content li{margin-bottom:4px}.chat-content table{border-collapse:collapse;width:100%;margin:16px 0}.chat-content th,.chat-content td{border:1px solid var(--border);text-align:left;padding:10px 12px}.chat-content th{background-color:var(--bg-input);font-weight:600}.chat-sources{color:var(--text-secondary);background:var(--bg-primary);border-radius:var(--radius-sm);margin-top:12px;padding:8px 12px;font-size:.85rem;display:inline-block}.sources-label{margin-right:6px;font-weight:600}.chat-thinking{color:var(--text-secondary);font-style:italic;animation:1.5s ease-in-out infinite pulse}@keyframes pulse{0%,to{opacity:.5}50%{opacity:1}}.chat-input-container{background:linear-gradient(180deg, transparent 0%, var(--bg-surface) 30%);flex-direction:column;align-items:center;padding:24px 20px;display:flex;position:absolute;bottom:0;left:0;right:0}.chat-input-form{background:var(--bg-input);border:1px solid var(--border);width:100%;max-width:800px;box-shadow:var(--shadow-sm);border-radius:24px;align-items:flex-end;gap:12px;padding:8px 16px;transition:border-color .2s,box-shadow .2s;display:flex}.chat-input-form:focus-within{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-light);background:var(--bg-surface)}.chat-input-form textarea{resize:none;color:var(--text-primary);background:0 0;border:none;outline:none;flex:1;max-height:200px;padding:12px 0;font-family:inherit;font-size:1rem;line-height:1.5;overflow-y:auto}.chat-input-form textarea::placeholder{color:var(--text-secondary)}.chat-send-btn{background:var(--accent);color:#fff;cursor:pointer;border:none;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:40px;height:40px;margin-bottom:6px;transition:background-color .2s;display:flex}.chat-send-btn:hover:not(:disabled){background:var(--accent-hover)}.chat-send-btn:disabled{background:var(--border);color:var(--text-secondary);cursor:not-allowed}.chat-footer-text{color:var(--text-secondary);margin-top:12px;font-size:.75rem}.quiz-main{max-width:800px;margin:0 auto;padding:40px 24px}.quiz-main-centered{flex-direction:column;justify-content:center;align-items:center;height:100vh;display:flex}.quiz-header{border-bottom:2px solid var(--border);justify-content:space-between;align-items:center;margin-bottom:32px;padding-bottom:16px;display:flex}.quiz-header h2{color:var(--text-primary);margin:0;font-size:1.5rem}.quiz-score-badge{background:linear-gradient(135deg, var(--accent) 0%, #3b82f6 100%);color:#fff;border-radius:var(--radius-pill);padding:8px 16px;font-size:1.1rem;font-weight:700;box-shadow:0 4px 6px -1px #2563eb33,0 2px 4px -2px #2563eb33}.quiz-content{flex-direction:column;gap:32px;padding-bottom:60px;display:flex}.quiz-card{border:2px solid var(--border);box-shadow:var(--shadow-sm);padding:32px;transition:border-color .3s}.quiz-card.correct-card{border-color:var(--success)}.quiz-card.incorrect-card{border-color:var(--error)}.question-text{color:var(--text-primary);margin-bottom:24px;font-size:1.2rem;font-weight:600;line-height:1.5}.question-number{color:var(--accent);margin-right:8px}.options-list{flex-direction:column;gap:12px;display:flex}.option-btn{text-align:left;border:2px solid var(--border);border-radius:var(--radius-md);background:var(--bg-surface);cursor:pointer;width:100%;color:var(--text-primary);align-items:center;padding:16px 20px;font-size:1.05rem;transition:all .2s;display:flex}.option-btn:active:not(:disabled){transform:scale(.98)}.option-btn:hover:not(:disabled){border-color:var(--accent);background:var(--bg-input)}.option-btn.selected{border-color:var(--accent);background:var(--accent-light)}.option-btn.correct-option{border-color:var(--success);background:var(--success-light);color:var(--success)}.option-btn.incorrect-option{border-color:var(--error);background:var(--error-light);color:var(--error)}.option-btn:disabled{cursor:default;opacity:.8}.option-label{background:var(--bg-input);width:32px;height:32px;color:var(--text-secondary);border:1px solid var(--border);border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;margin-right:16px;font-weight:700;display:flex}.option-btn.selected .option-label{background:var(--accent);color:#fff;border-color:var(--accent)}.option-btn.correct-option .option-label{background:var(--success);color:#fff;border-color:var(--success)}.option-btn.incorrect-option .option-label{background:var(--error);color:#fff;border-color:var(--error)}.option-text{flex:1;line-height:1.4}.explanation-box{border-radius:var(--radius-md);margin-top:24px;padding:20px;animation:.3s ease-out slideDown}.explanation-box.correct{background:var(--success-light);border:1px solid #2e7d3233}.explanation-box.incorrect{background:var(--error-light);border:1px solid #e5393533}.explanation-header{margin-bottom:8px;font-size:1.1rem;font-weight:700}.explanation-box.correct .explanation-header{color:var(--success)}.explanation-box.incorrect .explanation-header{color:var(--error)}.explanation-text{color:var(--text-primary);font-size:1rem;line-height:1.7}.quiz-actions{justify-content:center;margin-top:20px;display:flex}.submit-quiz-btn{border-radius:var(--radius-pill);box-shadow:var(--shadow-md);width:100%;max-width:400px;padding:16px 48px;font-size:1.2rem}.submit-quiz-btn:disabled{opacity:.6;cursor:not-allowed}@keyframes slideDown{0%{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:translateY(0)}}@media (width<=768px){.quiz-card{padding:20px}.quiz-header{flex-direction:column;align-items:flex-start;gap:16px}}:root{--bg-primary:#f7f9fc;--bg-surface:#fff;--bg-input:#edf1f7;--bg-surface-glass:#ffffffd9;--text-primary:#1a2733;--text-secondary:#5a6b7b;--accent:#2563eb;--accent-hover:#1d4ed8;--accent-light:#2563eb1a;--border:#d8dee6;--error:#e53935;--error-light:#e539351a;--success:#2563eb;--success-light:#2563eb1a;--shadow-sm:0 1px 3px #0000000f;--shadow-md:0 4px 12px #00000014;--shadow-lg:0 8px 24px #0000001f;--radius-sm:6px;--radius-md:10px;--radius-lg:16px;--radius-pill:999px;--sidebar-width:280px;--font-display:"Space Grotesk", sans-serif;--font-body:"Inter", sans-serif;--font-mono:"JetBrains Mono", monospace}[data-theme=dark]{--bg-primary:#0f1923;--bg-surface:#1a2733;--bg-input:#243040;--bg-surface-glass:#1a2733d9;--text-primary:#e8ecf1;--text-secondary:#8899a6;--accent:#00bfa6;--accent-hover:#00a88f;--accent-light:#00bfa61f;--border:#2a3a4a;--error:#ff6b6b;--error-light:#ff6b6b1f;--success:#4ade80;--success-light:#4ade801f;--shadow-sm:0 1px 3px #0003;--shadow-md:0 4px 12px #0000004d;--shadow-lg:0 8px 24px #0006}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-size:16px}body{font-family:var(--font-body);background-color:var(--bg-primary);color:var(--text-primary);min-height:100vh;line-height:1.6;transition:background-color .2s,color .2s}h1,h2,h3,h4,h5,h6{font-family:var(--font-display);font-weight:700;line-height:1.3}a{color:var(--accent);text-decoration:none;transition:color .15s}a:hover{color:var(--accent-hover)}:focus-visible{outline:2px solid var(--accent);outline-offset:2px}::-webkit-scrollbar{width:8px;height:8px}::-webkit-scrollbar-track{background:0 0}::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--text-secondary)}.btn{border-radius:var(--radius-md);cursor:pointer;border:none;outline:none;justify-content:center;align-items:center;padding:10px 20px;font-size:.95rem;font-weight:600;transition:all .2s cubic-bezier(.4,0,.2,1);display:inline-flex}.btn:active:not(:disabled){transform:scale(.97)}.btn-primary{background:linear-gradient(135deg, var(--accent) 0%, #3b82f6 100%);color:#fff;box-shadow:0 4px 6px -1px #2563eb33,0 2px 4px -2px #2563eb33}.btn-primary:hover:not(:disabled){background:linear-gradient(135deg, var(--accent-hover) 0%, #2563eb 100%);box-shadow:0 6px 8px -1px #2563eb4d,0 4px 6px -2px #2563eb4d}.btn-secondary{color:var(--text-primary);border:1px solid var(--border);background:0 0}.btn-secondary:hover{background:var(--accent-light);border-color:var(--accent);color:var(--accent)}.btn-danger{background:var(--error-light);color:var(--error);border:1px solid #0000}.btn-danger:hover{background:var(--error);color:#fff}.btn-ghost{color:var(--text-secondary);background:0 0;padding:6px 12px}.btn-ghost:hover{color:var(--text-primary);background:var(--accent-light)}.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}.btn-icon{border-radius:var(--radius-sm);padding:8px}.input{background:var(--bg-input);border:1px solid var(--border);border-radius:var(--radius-md);width:100%;color:var(--text-primary);font-family:var(--font-body);padding:10px 14px;font-size:.875rem;transition:border-color .15s,box-shadow .15s}.input:focus{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-light);outline:none}.input::placeholder{color:var(--text-secondary)}.card{background:var(--bg-surface);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);padding:24px}.text-secondary{color:var(--text-secondary)}.text-error{color:var(--error)}.text-success{color:var(--success)}.sr-only{clip:rect(0,0,0,0);border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}@keyframes sourcePulse{0%,to{opacity:.4;transform:scale(1)}50%{opacity:1;transform:scale(1.3)}}.source-dot{background:var(--accent);vertical-align:middle;border-radius:50%;width:6px;height:6px;margin-right:6px;display:inline-block}.source-dot--active{animation:1.5s ease-in-out infinite sourcePulse}@media (prefers-reduced-motion:reduce){.source-dot--active{opacity:1;animation:none}*,:before,:after{transition-duration:.01ms!important;animation-duration:.01ms!important}}[data-theme=dark] ::-webkit-scrollbar{width:8px}[data-theme=dark] ::-webkit-scrollbar-track{background:var(--bg-primary)}[data-theme=dark] ::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px}[data-theme=dark] ::-webkit-scrollbar-thumb:hover{background:var(--text-secondary)}@keyframes spin{to{transform:rotate(360deg)}}.spinner{border:3px solid var(--border);border-top-color:var(--accent);border-radius:50%;width:24px;height:24px;animation:.6s linear infinite spin}@media (prefers-reduced-motion:reduce){.spinner{border-top-color:var(--accent);opacity:.7;animation:none}}