@import"https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap";:root{--font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;--ink: #0f172a;--ink-secondary: #334155;--muted: #64748b;--muted-light: #94a3b8;--canvas: #f8fafc;--card-bg: #ffffff;--border: #e2e8f0;--border-strong: #cbd5e1;--accent: #0f766e;--accent-hover: #115e59;--accent-light: #f0fdfa;--danger: #dc2626;--danger-light: #fef2f2;--shadow-card: 0 1px 3px 0 rgba(0, 0, 0, .05), 0 10px 25px -5px rgba(0, 0, 0, .04);--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .05);--radius-sm: 6px;--radius-md: 8px;--radius-lg: 12px}*{box-sizing:border-box}html,body{margin:0;padding:0;min-height:100%}body{font-family:var(--font);color:var(--ink);background-color:var(--canvas);font-size:15px;line-height:1.5;-webkit-font-smoothing:antialiased}#static-content{display:none}a{color:inherit;text-decoration:none}button{font-family:inherit;cursor:pointer;border:none;background:none}.page-shell{min-height:100vh;display:flex;flex-direction:column}.site-header{height:56px;background:#fff;border-bottom:1px solid var(--border)}.header-inner{max-width:920px;margin:0 auto;padding:0 20px;height:100%;display:flex;align-items:center;justify-content:space-between}.brand{display:inline-flex;align-items:center;gap:8px;font-weight:700;font-size:17px;letter-spacing:-.02em;color:var(--ink)}.brand-mark{width:26px;height:26px;display:grid;place-items:center;flex-shrink:0}.brand-mark svg{width:100%;height:100%}.brand-dot{color:var(--accent)}nav{display:flex;align-items:center;gap:18px;font-size:14px}nav a{color:var(--muted);font-weight:500;transition:color .15s ease}nav a:hover{color:var(--ink)}.nav-tool-btn{padding:6px 14px;border-radius:var(--radius-sm);background:var(--canvas);border:1px solid var(--border-strong);color:var(--ink)!important;font-weight:600!important}.nav-tool-btn:hover{background:#fff;border-color:var(--ink)}.hero-section{padding:28px 20px 40px}.tool-container{max-width:760px;margin:0 auto}.hero-header{text-align:center;margin-bottom:20px}.hero-header h1{margin:0 0 8px;font-size:clamp(26px,3.2vw,34px);font-weight:700;letter-spacing:-.03em;color:var(--ink);line-height:1.2}.hero-subtitle{margin:0 auto;max-width:580px;font-size:15px;color:var(--muted);line-height:1.5}.trust-badges{display:flex;flex-wrap:wrap;justify-content:center;gap:8px;margin-top:14px}.trust-badge{display:inline-flex;align-items:center;gap:6px;background:#fff;border:1px solid var(--border);padding:5px 12px;border-radius:9999px;font-size:12.5px;font-weight:500;color:var(--ink);box-shadow:0 1px 2px #0f172a0a}.trust-badge svg{width:14px;height:14px;color:var(--accent);flex-shrink:0}.converter-card{background:var(--card-bg);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow-card);padding:24px}.dropzone{position:relative;border:2px dashed var(--border-strong);border-radius:var(--radius-md);background:#fbfcfd;padding:32px 20px;text-align:center;cursor:pointer;transition:border-color .15s ease,background-color .15s ease}.dropzone:hover{border-color:var(--accent);background:var(--accent-light)}.dropzone.is-dragging{border-color:var(--accent);background:#e6fffa}.dropzone.has-files{padding:20px 16px}.dropzone input[type=file]{position:absolute;inset:0;width:100%;height:100%;opacity:0;cursor:pointer}.dropzone-content{pointer-events:none;display:flex;flex-direction:column;align-items:center;gap:10px}.drop-icon{width:44px;height:44px;background:#fff;border:1px solid var(--border);border-radius:var(--radius-md);box-shadow:var(--shadow-sm);display:grid;place-items:center;color:var(--accent)}.drop-icon svg{width:22px;height:22px}.drop-title{margin:0 0 2px;font-size:16px;font-weight:600;color:var(--ink)}.drop-hint{margin:0;font-size:13px;color:var(--muted)}.button{height:42px;padding:0 22px;border-radius:var(--radius-sm);font-size:14px;font-weight:600;display:inline-flex;align-items:center;justify-content:center;gap:8px;white-space:nowrap;pointer-events:auto;transition:background-color .15s ease,border-color .15s ease,color .15s ease}.button-picker{background:var(--accent);color:#fff;border:1px solid var(--accent);height:38px;padding:0 18px;margin-top:4px}.button-picker:hover{background:var(--accent-hover);border-color:var(--accent-hover)}.button-primary{background:#0f172a;color:#fff;border:1px solid #0f172a}.button-primary:hover{background:#1e293b;border-color:#1e293b}.button-secondary{background:#fff;color:var(--ink);border:1px solid var(--border-strong)}.button-secondary:hover{background:var(--canvas);border-color:var(--ink)}.button:disabled{opacity:.5;cursor:not-allowed}.alert-box{margin-top:14px;padding:10px 14px;background:var(--danger-light);border:1px solid rgba(220,38,38,.2);border-radius:var(--radius-sm);color:var(--danger);font-size:13px}.queue-section{margin-top:20px}.queue-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:10px}.queue-count{font-size:13px;font-weight:600;color:var(--ink-secondary)}.text-btn{font-size:13px;color:var(--muted);cursor:pointer}.text-btn:hover{color:var(--danger);text-decoration:underline}.file-list{list-style:none;padding:0;margin:0 0 16px;display:flex;flex-direction:column;gap:8px;max-height:240px;overflow-y:auto}.file-item{display:flex;align-items:center;gap:12px;padding:10px 14px;background:#fbfcfd;border:1px solid var(--border);border-radius:var(--radius-sm)}.file-status-icon{width:28px;height:28px;border-radius:var(--radius-sm);background:#fff;border:1px solid var(--border);color:var(--muted);display:grid;place-items:center;flex-shrink:0}.file-status-icon.done{background:#ecfdf5;color:#059669;border-color:#a7f3d0}.file-status-icon.error{background:var(--danger-light);color:var(--danger);border-color:#fecaca}.file-status-icon svg{width:15px;height:15px}.file-info{flex:1;min-width:0;display:flex;flex-direction:column;gap:2px}.file-name{font-size:13px;font-weight:600;color:var(--ink);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.file-sub{font-size:12px;color:var(--muted)}.file-ctrls{display:flex;align-items:center;gap:6px}.icon-action-btn{width:32px;height:32px;display:grid;place-items:center;border-radius:var(--radius-sm);color:var(--muted);transition:all .15s ease}.icon-action-btn:hover{background:#e2e8f0;color:var(--ink)}.icon-action-btn.remove:hover{background:var(--danger-light);color:var(--danger)}.icon-action-btn svg{width:16px;height:16px}.spinner{width:14px;height:14px;border:2px solid var(--border-strong);border-top-color:var(--accent);border-radius:50%;animation:spin .8s linear infinite;display:inline-block}@keyframes spin{to{transform:rotate(360deg)}}.controls-bar{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:14px 16px;background:#f8fafc;border:1px solid var(--border);border-radius:var(--radius-sm);margin-bottom:16px;flex-wrap:wrap}.format-toggle{display:flex;align-items:center;gap:12px}.control-label{font-size:13px;font-weight:600;color:var(--ink-secondary)}.segmented-tabs{display:inline-flex;background:#e2e8f0;padding:3px;border-radius:var(--radius-sm);gap:2px}.tab-btn{padding:5px 14px;border-radius:4px;font-size:13px;font-weight:600;color:var(--muted);background:transparent;transition:all .15s ease}.tab-btn.selected{background:#fff;color:var(--ink);box-shadow:var(--shadow-sm)}.quality-slider-group{flex:1;min-width:180px;display:flex;flex-direction:column;gap:4px}.slider-label-row{display:flex;justify-content:space-between;align-items:center}.quality-value{font-size:12px;font-weight:600;color:var(--accent)}input[type=range]{-webkit-appearance:none;appearance:none;width:100%;height:5px;border-radius:3px;background:#cbd5e1;outline:none}input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;appearance:none;width:16px;height:16px;border-radius:50%;background:var(--ink);cursor:pointer}.completion-alert{display:flex;align-items:center;gap:8px;padding:10px 14px;background:#ecfdf5;border:1px solid #a7f3d0;border-radius:var(--radius-sm);color:#065f46;font-size:13px;font-weight:600;margin-bottom:14px}.completion-alert svg{width:16px;height:16px}.action-row{display:flex;gap:10px}.action-row .button{flex:1}.card-footer-note{margin-top:18px;padding-top:14px;border-top:1px solid var(--border);display:flex;align-items:center;justify-content:center;gap:8px;font-size:13px;color:var(--muted)}.note-item{display:inline-flex;align-items:center;gap:6px}.note-item svg{width:14px;height:14px;color:var(--accent)}.card-footer-note .divider{color:var(--border-strong)}.info-section{background:#fff;border-top:1px solid var(--border);padding:60px 20px}.content-container{max-width:760px;margin:0 auto}.info-block{margin-bottom:48px}.info-block:last-child{margin-bottom:0}.info-block h2{font-size:22px;font-weight:700;letter-spacing:-.02em;color:var(--ink);margin:0 0 16px}.info-block p{color:var(--muted);line-height:1.6;margin:0 0 16px}.steps-row{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:20px}.step-item{padding:18px;background:var(--canvas);border:1px solid var(--border);border-radius:var(--radius-md)}.step-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}.step-icon{width:32px;height:32px;border-radius:var(--radius-sm);background:#fff;border:1px solid var(--border);display:grid;place-items:center;color:var(--accent)}.step-icon svg{width:16px;height:16px}.step-number{font-size:12px;font-weight:700;color:var(--muted-light)}.step-item h3{margin:0 0 6px;font-size:15px;font-weight:600;color:var(--ink)}.step-item p{margin:0;font-size:13px;color:var(--muted);line-height:1.5}.faq-group details{border-bottom:1px solid var(--border);padding:14px 0}.faq-group summary{list-style:none;cursor:pointer;font-size:15px;font-weight:600;color:var(--ink);display:flex;align-items:center;justify-content:space-between}.faq-group summary::-webkit-details-marker{display:none}.faq-group summary svg{width:16px;height:16px;color:var(--muted);transition:transform .2s ease}.faq-group details[open] summary svg{transform:rotate(180deg);color:var(--accent)}.faq-group summary:hover{color:var(--accent)}.faq-group details p{margin:8px 0 0;font-size:14px;color:var(--muted);line-height:1.55}.privacy-page{padding:48px 20px 80px;flex:1}.privacy-page h1{font-size:32px;font-weight:700;letter-spacing:-.02em;margin:0 0 12px}.privacy-page .lead{font-size:17px;color:var(--muted);line-height:1.6;margin-bottom:32px}.privacy-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius-md);padding:28px;margin-bottom:28px}.privacy-item{margin-bottom:24px}.privacy-item:last-child{margin-bottom:0}.privacy-item-header{display:flex;align-items:center;gap:10px;margin-bottom:8px}.privacy-item-header svg{width:18px;height:18px;color:var(--accent);flex-shrink:0}.privacy-item-header h2{font-size:17px;font-weight:600;margin:0;color:var(--ink)}.privacy-card p{color:var(--muted);line-height:1.6;margin:0}.site-footer{margin-top:auto;background:#fff;border-top:1px solid var(--border);padding:32px 20px}.footer-container{max-width:920px;margin:0 auto;display:flex;align-items:center;justify-content:space-between}.footer-links{display:flex;gap:20px;font-size:13px;color:var(--muted)}.footer-links a:hover{color:var(--ink)}.footer-legal{max-width:920px;margin:16px auto 0;font-size:12px;color:var(--muted-light);text-align:center}.footer-legal p{margin:0}@media(max-width:640px){.hero-section{padding:20px 16px 32px}.converter-card{padding:16px}.steps-row{grid-template-columns:1fr;gap:12px}.controls-bar{flex-direction:column;align-items:stretch;gap:14px}.action-row{flex-direction:column}.card-footer-note{flex-direction:column;gap:4px}.card-footer-note .divider{display:none}.footer-container{flex-direction:column;gap:16px;align-items:flex-start}}