.app{max-width:896px;margin:0 auto;padding:48px 24px 96px;min-height:100vh;display:flex;flex-direction:column}.header{text-align:center;margin-bottom:48px}.logo{font-size:48px;margin-bottom:12px;display:inline-block}.header h1{font-size:36px;font-weight:600;color:var(--text);letter-spacing:-.02em;margin-bottom:10px}.subtitle{color:var(--text-secondary);font-size:15px;font-weight:300;letter-spacing:-.01em;margin-bottom:16px}.features-bar{display:flex;justify-content:center;gap:16px;flex-wrap:wrap}.features-bar span{font-size:12px;color:var(--text-tertiary);background:#00000008;padding:4px 12px;border-radius:999px;border:1px solid rgba(0,0,0,.06);letter-spacing:-.01em}.navbar{position:sticky;top:0;z-index:50;background:#ffffffb8;backdrop-filter:saturate(180%) blur(20px);-webkit-backdrop-filter:saturate(180%) blur(20px);border-bottom:1px solid rgba(0,0,0,.06);padding:0 24px;height:56px;display:flex;align-items:center;justify-content:space-between}.navbar-brand{font-size:14px;font-weight:500;color:var(--text);letter-spacing:-.01em;text-decoration:none}.navbar-brand:hover{opacity:.7}.navbar-link{font-size:13px;font-weight:400;color:var(--text-secondary);text-decoration:none;transition:color .2s ease}.navbar-link:hover{color:var(--text)}.card{background:var(--card-bg);border-radius:var(--radius-lg);padding:32px;border:1px solid var(--border);box-shadow:0 1px 2px #0000000a;margin-bottom:16px;transition:border-color .2s ease,box-shadow .2s ease}.card:hover{border-color:var(--border-hover);box-shadow:0 4px 6px -1px #0000000f}.input-card{padding:20px 28px 24px}.input-tabs{display:flex;gap:0;margin-bottom:16px;border-bottom:1px solid rgba(0,0,0,.06);padding-bottom:0}.input-tab{padding:8px 20px;font-size:13px;font-weight:400;color:var(--text-tertiary);cursor:pointer;border-bottom:2px solid transparent;margin-bottom:-1px;transition:all .2s ease;-webkit-user-select:none;user-select:none}.input-tab:hover{color:var(--text-secondary)}.input-tab.active{color:var(--text);font-weight:500;border-bottom-color:var(--text)}.input-group{display:flex;gap:10px}.url-input{flex:1;padding:10px 16px;border:1px solid rgba(0,0,0,.1);border-radius:var(--radius-sm);font-size:14px;font-weight:300;font-family:var(--font-stack);color:var(--text);background:#00000005;outline:none;transition:all .2s ease;letter-spacing:-.01em}.url-input:focus{border-color:#0003;background:var(--bg)}.url-input:disabled{background:#00000005;cursor:not-allowed;opacity:.6}.url-input::placeholder{color:var(--text-tertiary);font-weight:300}.file-name-display{flex:1;padding:10px 16px;border:1px solid rgba(0,0,0,.1);border-radius:var(--radius-sm);font-size:14px;font-weight:400;color:var(--text);background:#00000005;cursor:pointer;display:flex;align-items:center;justify-content:space-between;transition:all .2s ease}.file-name-display:hover{border-color:#0003;background:var(--bg)}.file-change-hint{font-size:11px;color:var(--text-tertiary);font-weight:300}.btn{border:1px solid rgba(0,0,0,.1);border-radius:var(--radius-sm);padding:10px 22px;font-size:13px;font-weight:500;font-family:var(--font-stack);cursor:pointer;transition:all .2s ease;white-space:nowrap;letter-spacing:-.01em}.btn:disabled{opacity:.4;cursor:not-allowed}.btn-primary{background:var(--gray-900);color:#fff;border-color:var(--gray-900)}.btn-primary:hover:not(:disabled){background:#1f2937;border-color:#1f2937}.btn-outline{background:transparent;color:var(--text-secondary);border:1px solid rgba(0,0,0,.1)}.btn-outline:hover{background:#0000000a;color:var(--text)}.btn-sm{padding:4px 12px;font-size:12px;border-radius:6px;background:transparent;color:var(--text-secondary);border:1px solid rgba(0,0,0,.08)}.btn-sm:hover{background:#0000000a}.progress-card{text-align:center;animation:fadeIn .4s ease}.progress-header{display:flex;align-items:center;justify-content:center;gap:14px;margin-bottom:20px}.step-icon{font-size:28px}.step-info{display:flex;flex-direction:column;align-items:flex-start;gap:2px}.step-text{font-size:14px;font-weight:500;color:var(--text);letter-spacing:-.01em}.step-sub{font-size:11px;color:var(--text-tertiary);font-weight:300;letter-spacing:-.01em}.progress-bar{height:4px;background:#0000000f;border-radius:2px;overflow:hidden;margin-bottom:12px}.progress-fill{height:100%;background:var(--gray-900);border-radius:2px;transition:width .6s ease}.progress-percent{font-size:12px;color:var(--text-tertiary);font-weight:400}.error-msg{margin-top:14px;padding:10px 14px;background:var(--error-bg);border:1px solid var(--error-border);border-radius:var(--radius-sm);color:var(--error);font-size:13px;font-weight:300;display:flex;align-items:center;justify-content:space-between}.result{animation:fadeIn .5s ease}@keyframes fadeIn{0%{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}.result-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}.result-header h2{font-size:22px;font-weight:600;letter-spacing:-.02em}.result-tabs{display:flex;gap:0;margin-bottom:16px;background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius-sm);overflow:hidden}.result-tab{flex:1;padding:10px 16px;font-size:13px;font-weight:400;font-family:var(--font-stack);background:transparent;border:none;cursor:pointer;color:var(--text-secondary);transition:all .2s ease;letter-spacing:-.01em;border-right:1px solid var(--border)}.result-tab:last-child{border-right:none}.result-tab:hover{background:#00000005;color:var(--text)}.result-tab.active{background:var(--gray-900);color:#fff;font-weight:500}.tab-content{animation:fadeIn .3s ease}.result-card h3{font-size:15px;font-weight:600;margin-bottom:14px;color:var(--text);letter-spacing:-.01em}.overview-text{font-size:14px;font-weight:300;color:var(--text-secondary);line-height:1.8;letter-spacing:-.01em}.empty-hint{font-size:14px;color:var(--text-tertiary);text-align:center;padding:20px 0}.tone-badge{display:inline-block;padding:5px 14px;background:#0000000a;color:var(--text-secondary);border:1px solid rgba(0,0,0,.08);border-radius:9999px;font-size:13px;font-weight:400;letter-spacing:-.01em}.sections{display:flex;flex-direction:column;gap:10px}.section-item{display:flex;gap:14px;padding:16px;background:#00000005;border-radius:var(--radius-sm);border:1px solid transparent;transition:background .2s ease,border-color .2s ease}.section-item:hover{background:#0000000a;border-color:#0000000f}.section-time{flex-shrink:0;padding:3px 10px;background:#0000000f;color:var(--text-secondary);border-radius:9999px;font-size:12px;font-weight:500;font-variant-numeric:tabular-nums;letter-spacing:-.01em;height:fit-content}.section-body h4{font-size:14px;font-weight:600;margin-bottom:4px;color:var(--text);letter-spacing:-.01em}.section-body p{font-size:13px;font-weight:300;color:var(--text-secondary);line-height:1.6;letter-spacing:-.01em}.key-points{padding-left:0;list-style:none}.key-points li{font-size:14px;font-weight:300;color:var(--text);padding:8px 0 8px 20px;line-height:1.6;letter-spacing:-.01em;position:relative;border-bottom:1px solid rgba(0,0,0,.04)}.key-points li:last-child{border-bottom:none}.key-points li:before{content:"";position:absolute;left:0;top:16px;width:6px;height:6px;border-radius:9999px;background:var(--gray-900)}.transcript-card{margin-top:16px}.transcript-toggle{width:100%;background:none;border:none;cursor:pointer;padding:0;text-align:left;font-family:var(--font-stack)}.transcript-toggle h3{margin-bottom:0;font-size:15px;font-weight:600;color:var(--text-secondary);transition:color .2s ease;letter-spacing:-.01em}.transcript-toggle:hover h3{color:var(--text)}.transcript-content{margin-top:14px;padding-top:14px;border-top:1px solid var(--border)}.transcript-content p{font-size:13px;font-weight:300;color:var(--text-secondary);line-height:1.7;white-space:pre-wrap;letter-spacing:-.01em}.footer{text-align:center;margin-top:80px;color:var(--text-tertiary);font-size:12px;font-weight:300;letter-spacing:-.01em}@media (max-width: 640px){.app{padding:32px 16px 64px}.header{margin-bottom:32px}.header h1{font-size:26px}.logo{font-size:38px}.input-group{flex-direction:column}.btn{width:100%;text-align:center}.card{padding:20px}.section-item{flex-direction:column;gap:8px}.section-time{align-self:flex-start}.features-bar{gap:8px}.features-bar span{font-size:11px;padding:3px 10px}}*{margin:0;padding:0;box-sizing:border-box}:root{--bg: #ffffff;--card-bg: #ffffff;--text: #111827;--text-secondary: #4b5563;--text-tertiary: #6b7280;--border: rgba(229, 231, 235, .5);--border-hover: #d1d5db;--gray-100: #f3f4f6;--gray-900: #111827;--error: #ef4444;--error-bg: #fef2f2;--error-border: #fecaca;--radius-sm: 8px;--radius-md: 12px;--radius-lg: 16px;--font-stack: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Helvetica Neue", "Helvetica", "Arial", sans-serif}html{scroll-behavior:smooth}body{font-family:var(--font-stack);background:var(--bg);color:var(--text);min-height:100vh;line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}::-webkit-scrollbar{width:6px}::-webkit-scrollbar-track{background:transparent}::-webkit-scrollbar-thumb{background:#0003;border-radius:3px}