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auto;padding:16px;min-height:100vh;display:flex;flex-direction:column}.header{text-align:center;padding:24px 0 8px}.logo{display:inline-flex;align-items:center;gap:8px;font-size:22px;font-weight:700}.logo-icon{width:36px;height:36px;border-radius:10px;background:var(--primary);display:flex;align-items:center;justify-content:center;color:#fff;font-size:20px}.tagline{color:var(--text-secondary);font-size:13px;margin-top:8px}.input-card{background:var(--card);border-radius:16px;padding:20px;margin-top:20px;box-shadow:0 1px 3px #0000000a}.input-card textarea{width:100%;min-height:100px;border:1.5px solid var(--border);border-radius:12px;padding:14px;font-size:15px;resize:none;font-family:inherit;line-height:1.5;transition:border-color .2s}.input-card textarea:focus{outline:none;border-color:var(--primary)}.input-card textarea::placeholder{color:#c0c0c5}.btn-row{display:flex;gap:12px;margin-top:14px}.btn{flex:1;height:48px;border:none;border-radius:12px;font-size:16px;font-weight:600;cursor:pointer;transition:opacity .2s;font-family:inherit}.btn:active{opacity:.8}.btn-primary{background:var(--primary);color:#fff}.btn-secondary{background:var(--border);color:var(--text)}.btn:disabled{opacity:.5;cursor:not-allowed}.paste-hint{margin-top:10px;font-size:12px;color:var(--text-secondary);display:flex;align-items:center;gap:4px}.result-card{background:var(--card);border-radius:16px;margin-top:16px;overflow:hidden;box-shadow:0 1px 3px #0000000a;animation:slideUp .3s ease}@keyframes slideUp{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}.result-card video{width:100%;display:block;background:#000;max-height:60vh}.result-info{padding:16px}.result-title{font-size:15px;font-weight:600;line-height:1.4;margin-bottom:6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.result-author{font-size:13px;color:var(--text-secondary);margin-bottom:16px}.download-btn{width:100%;height:48px;background:var(--success);color:#fff;border:none;border-radius:12px;font-size:16px;font-weight:600;cursor:pointer;font-family:inherit;display:flex;align-items:center;justify-content:center;gap:6px}.download-btn:active{opacity:.85}.error-msg{background:#fff0f0;color:#d63031;border-radius:12px;padding:14px;font-size:14px;margin-top:16px;text-align:center}.loading-overlay{text-align:center;padding:40px 20px;color:var(--text-secondary)}.spinner{width:32px;height:32px;border:3px solid var(--border);border-top-color:var(--primary);border-radius:50%;animation:spin .8s linear infinite;margin:0 auto 12px}@keyframes spin{to{transform:rotate(360deg)}}.footer{margin-top:auto;padding:20px 0;text-align:center;font-size:12px;color:var(--text-secondary)}.tool-tabs{display:flex;gap:8px;margin-top:16px;overflow-x:auto;padding-bottom:4px}.tool-tab{flex-shrink:0;padding:8px 16px;border-radius:20px;background:var(--card);border:1px solid var(--border);font-size:13px;color:var(--text-secondary);cursor:pointer}.tool-tab.active{background:var(--text);color:#fff;border-color:var(--text)}