:root{--primary:#4361ee;--primary-dark:#3a0ca3;--secondary:#7209b7;--bg-body:#0f172a;--bg-card:#1e293b;--text-primary:#f1f5f9;--text-secondary:#94a3b8;--text-muted:#64748b;--border:#334155;--shadow:0 4px 24px rgba(0,0,0,0.3);--radius:8px;--radius-xl:20px;--success:#06d6a0;--danger:#e63946;--warning:#f8961e;--primary-light:rgba(67,97,238,0.12);--light-gray:#e2e8f0;--gray:#64748b;--dark:#1e293b;--code-bg:#1e293b}*{margin:0;padding:0;box-sizing:border-box}body{font-family:"Inter",system-ui,-apple-system,sans-serif;background:var(--bg-body);color:var(--text-primary);line-height:1.75;overflow-x:hidden;min-height:100vh}a{color:var(--primary);text-decoration:none;transition:color .2s}a:hover{color:var(--primary-light)}::selection{background:var(--primary);color:#fff}::-webkit-scrollbar{width:10px}::-webkit-scrollbar-track{background:var(--bg-body)}::-webkit-scrollbar-thumb{background:var(--border);border-radius:5px}::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}.hero-section{padding:120px 0 80px;background:linear-gradient(135deg, #4361ee 0%, #3a0ca3 50%, #7209b7 100%);color:#fff;position:relative;overflow:hidden}.hero-section::after{content:"";position:absolute;bottom:-2px;left:0;right:0;height:60px;background:var(--bg-body);clip-path:ellipse(55% 100% at 50% 100%)}.hero-title{font-size:clamp(1.8rem,4vw,2.8rem);font-weight:800;margin-bottom:12px}.hero-desc{font-size:1.05rem;opacity:.9;max-width:560px}.tool-wrapper{margin-top:-30px;position:relative;z-index:10;padding-bottom:2rem}.tool-card{background:var(--bg-card);border-radius:var(--radius-xl);padding:2rem;box-shadow:var(--shadow);border:1px solid var(--border)}.content-section{padding:40px 0}.content-card{background:var(--bg-card);border-radius:var(--radius-xl);padding:40px;margin-bottom:28px;box-shadow:var(--shadow);border:1px solid var(--border)}.content-card h2{font-size:1.4rem;margin-bottom:16px}.content-card p{color:var(--text-secondary);margin-bottom:14px;line-height:1.8}.content-card ul{color:var(--text-secondary);margin-bottom:14px;padding-left:20px;color:var(--text-secondary)}.content-card ul li{margin-bottom:6px}h1,h2,h3,h4,h5{font-family:"Poppins",sans-serif;font-weight:600;line-height:1.3}.container{width:100%;max-width:1400px;margin:0 auto;padding:0 20px}.url-input-group{display:flex;gap:10px;margin-bottom:12px}.url-input{flex:1;padding:14px 18px;border:1.5px solid var(--border);border-radius:10px;font-size:1rem;font-family:"Inter",sans-serif;transition:border-color .2s,box-shadow .2s;background:var(--bg-body);color:var(--text-primary)}.url-input:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(67,97,238,.15)}.url-examples{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:12px}.url-example{background:var(--primary-light);color:var(--primary);padding:6px 14px;border-radius:20px;font-size:.85rem;cursor:pointer;transition:all .2s;font-weight:500}.url-example:hover{background:rgba(67,97,238,.2)}.btn{padding:12px 24px;border-radius:8px;font-weight:600;cursor:pointer;transition:all .2s;border:none;display:inline-flex;align-items:center;justify-content:center;gap:8px;font-size:.92rem;font-family:"Inter",sans-serif}.btn-primary{background:linear-gradient(135deg, var(--primary), var(--primary-dark));color:#fff;box-shadow:0 4px 15px rgba(67,97,238,.3)}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 18px rgba(67,97,238,.3)}.btn-primary:disabled{opacity:.6;cursor:not-allowed;transform:none;box-shadow:none}.btn-secondary{background:var(--bg-body);color:var(--primary);border:2px solid var(--primary)}.btn-secondary:hover{background:var(--primary-light);transform:translateY(-2px)}.btn-success{background:linear-gradient(135deg, var(--success), #00b4d8);color:#fff}.btn-success:hover{transform:translateY(-2px);box-shadow:0 6px 18px rgba(6,214,160,.3)}.btn-ghost{background:rgba(0,0,0,0);color:var(--text-secondary);border:1px solid var(--border)}.btn-ghost:hover{background:var(--bg-card);color:var(--text-primary);border-color:var(--text-muted)}.trust-bar{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;padding:18px;margin:14px 0;background:var(--bg-body);border-radius:var(--radius);border:1px solid var(--border)}.trust-item i{color:var(--primary)}.result-container{display:none;margin-top:20px}.result-container.active{display:block;animation:fadeIn .4s ease}.preview-split{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:16px}@media(max-width: 900px){.preview-split{grid-template-columns:1fr}}.preview-pane{border-radius:10px;overflow:hidden;border:1px solid var(--border);display:flex;flex-direction:column}.preview-pane-header{background:linear-gradient(to right, var(--primary), var(--primary-dark));color:#fff;padding:10px 14px;display:flex;align-items:center;justify-content:space-between;font-size:.85rem;font-weight:600}.preview-pane-header i{margin-right:6px}.preview-pane-body{padding:0;background:var(--bg-body);flex:1;min-height:350px;max-height:500px;overflow:auto}.markdown-raw{font-family:"Fira Code",monospace;font-size:13px;line-height:1.7;padding:16px;white-space:pre-wrap;word-break:break-word;background:#1e293b;color:#e2e8f0;margin:0;tab-size:2}.rendered-preview{padding:20px;font-family:"Inter",sans-serif;line-height:1.7;color:var(--text-primary)}.rendered-preview h1{font-size:1.5rem;margin-bottom:12px}.rendered-preview h2{font-size:1.2rem;margin-bottom:8px}.rendered-preview h3{font-size:1.05rem;margin-bottom:6px}.rendered-preview p{margin-bottom:10px;color:var(--text-secondary)}.rendered-preview code{background:var(--border);padding:2px 6px;border-radius:4px;font-size:.88rem}.rendered-preview pre{background:#1e293b;color:#e2e8f0;padding:14px;border-radius:8px;overflow-x:auto;margin-bottom:12px}.rendered-preview pre code{background:rgba(0,0,0,0);padding:0;color:inherit}.rendered-preview blockquote{border-left:3px solid var(--primary);padding-left:14px;margin:12px 0;color:var(--text-muted);font-style:italic}.rendered-preview ul,.rendered-preview ol{padding-left:20px;margin-bottom:12px;color:var(--text-secondary)}.rendered-preview li{margin-bottom:4px}.rendered-preview img{max-width:100%;border-radius:6px;margin:12px 0}.rendered-preview a{color:var(--primary);text-decoration:underline}.result-actions{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:12px}.notification{position:fixed;top:20px;right:20px;background:var(--bg-card);padding:14px 20px;border-radius:10px;box-shadow:var(--shadow);display:flex;align-items:center;gap:12px;z-index:1001;transform:translateX(120%);transition:transform .4s cubic-bezier(0.68, -0.55, 0.265, 1.55);max-width:420px;border-left:4px solid var(--success)}.notification.show{transform:translateX(0)}.notification.error{border-left-color:var(--danger)}.notification.info{border-left-color:var(--primary)}.notification.warning{border-left-color:var(--warning)}.notification-icon{font-size:1.2rem;flex-shrink:0}.notification-content h4{font-size:.9rem;margin-bottom:2px;color:var(--text-primary)}.notification-content p{font-size:.82rem;color:var(--text-secondary)}.notification-close{background:none;border:none;color:var(--text-secondary);cursor:pointer;padding:4px;font-size:.9rem;margin-left:auto;flex-shrink:0}.loading-spinner{display:inline-block;width:18px;height:18px;border:2.5px solid hsla(0,0%,100%,.3);border-radius:50%;border-top-color:#fff;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}@keyframes fadeIn{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}.progress-overlay{position:absolute;top:0;left:0;right:0;bottom:0;background:rgba(15,23,42,.95);display:none;align-items:center;justify-content:center;flex-direction:column;gap:16px;z-index:20;border-radius:16px}.progress-overlay.active{display:flex}.progress-bar-track{width:70%;height:6px;background:var(--border);border-radius:3px;overflow:hidden}.progress-bar-fill{height:100%;background:linear-gradient(to right, var(--primary), var(--primary-dark));border-radius:3px;width:0%;transition:width .4s ease}.progress-text{font-size:.9rem;color:var(--text-secondary);font-weight:500}#floatThemeToggle{position:fixed;right:20px;top:50%;transform:translateY(-50%);width:42px;height:42px;border-radius:50%;background:var(--bg-card);color:var(--text-primary);border:1.5px solid var(--border);font-size:1.2rem;cursor:pointer;box-shadow:0 4px 20px rgba(0,0,0,.25);z-index:9999;display:flex;align-items:center;justify-content:center;transition:all .3s}#floatThemeToggle:hover{background:var(--primary);color:#fff;border-color:var(--primary);transform:translateY(-50%) scale(1.1)}#backToTop{position:fixed;bottom:30px;right:30px;width:40px;height:40px;border-radius:50%;background:var(--primary);color:#fff;border:none;font-size:1.1rem;cursor:pointer;box-shadow:0 4px 16px rgba(67,97,238,.3);opacity:0;transform:translateY(20px);transition:all .3s;z-index:999}#backToTop.show{opacity:1;transform:translateY(0)}#app-content[data-theme=light]{--bg-body:#f0f4ff;--bg-card:#ffffff;--text-primary:#1e293b;--text-secondary:#475569;--text-muted:#64748b;--border:#e2e8f0;--shadow:0 4px 24px rgba(67, 97, 238, 0.08)}#app-content[data-theme=light] .hero-section{background:linear-gradient(135deg, #eef2ff 0%, #e0e7ff 50%, #eef2ff 100%)}#app-content[data-theme=light] .hero-section h1{color:#1e293b}#app-content[data-theme=light] .hero-section p{color:#64748b}#app-content[data-theme=light] .hero-section::after{background:#f0f4ff}#app-content[data-theme=light] #floatThemeToggle{background:#fff;border-color:#cbd5e1;color:#1e293b;box-shadow:0 4px 20px rgba(0,0,0,.1)}#app-content[data-theme=light] #floatThemeToggle:hover{background:var(--primary);color:#fff;border-color:var(--primary)}#app-content[data-theme=light] .progress-overlay{background:rgba(248,250,252,.95)}#app-content[data-theme=light] .btn-secondary{background:#fff}.faq-item{margin-bottom:15px;border:1px solid var(--border);border-radius:10px;overflow:hidden}.faq-question{width:100%;text-align:left;padding:20px 25px;background:var(--bg-card);border:none;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-weight:600;font-size:1.05rem;font-family:"Inter",sans-serif;transition:background .2s;color:var(--text-primary)}.faq-question:hover{background:var(--bg-body)}.faq-answer{padding:0 25px;max-height:0;overflow:hidden;transition:max-height .3s ease;background:var(--bg-body)}.step-card{display:flex;gap:25px;align-items:start;background:var(--bg-card);padding:30px;border-radius:12px;box-shadow:var(--shadow);margin-bottom:25px}.step-number{background:linear-gradient(135deg, var(--primary), var(--primary-dark));color:#fff;width:60px;height:60px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.5rem;font-weight:700;flex-shrink:0}@media(max-width: 768px){.url-input-group{flex-direction:column}.step-card{flex-direction:column;align-items:center;text-align:center}.url-examples{justify-content:center}}body{font-family:sans-serif;max-width:800px;margin:0 auto;padding:20px;line-height:1.6}h1{border-bottom:1px solid #a2a9b1;padding-bottom:5px}img{max-width:100%}.infobox{float:right;margin:0 0 15px 20px;border:1px solid #a2a9b1;background:#f8f9fa;padding:8px;font-size:.9rem}table{border-collapse:collapse}th,td{border:1px solid #a2a9b1;padding:4px 8px}@media(max-width: 480px){.container{padding:0 14px}.hero-section{padding:90px 0 60px}.hero-desc{max-width:100%}.tool-card{padding:1.25rem}.content-card{padding:24px}.url-input{font-size:.95rem;padding:12px 14px}.url-example{font-size:.8rem}.btn{width:100%}.preview-split{gap:10px}.preview-pane-body{min-height:250px}.rendered-preview{padding:14px}.notification{top:10px;right:10px;left:10px;max-width:none}#floatThemeToggle{right:14px}#backToTop{bottom:20px;right:20px}.faq-question{padding:16px 18px}.faq-answer{padding:0 18px}.step-card{padding:20px;gap:16px}.step-number{width:48px;height:48px;font-size:1.2rem}}@media(prefers-reduced-motion: reduce){*,*::before,*::after{animation-duration:.01ms !important;transition-duration:.01ms !important}}