:root{color-scheme:light;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif;background:#eef2f7;color:#141821;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;--panel: #ffffff;--panel-muted: #f7f9fc;--line: #dbe2ec;--ink: #141821;--muted: #667387;--shadow: 0 22px 70px rgba(32, 43, 63, .16)}*{box-sizing:border-box}body{margin:0;min-width:320px}button,input{font:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed}.app-shell{min-height:100vh;padding:28px;background:radial-gradient(circle at 16% 18%,color-mix(in srgb,var(--accent) 16%,transparent),transparent 28%),radial-gradient(circle at 88% 80%,rgba(14,165,233,.14),transparent 30%),linear-gradient(180deg,#f8fafc,#eef2f7)}.workspace{width:min(1120px,100%);margin:0 auto}.topbar{display:grid;grid-template-columns:54px minmax(0,1fr) auto;align-items:center;gap:14px;margin-bottom:22px}.brand-mark,.source-badge{display:grid;place-items:center;border-radius:8px;background:#172033;color:#fff}.brand-mark{width:54px;height:54px;box-shadow:0 14px 32px #1720333d}.brand-mark img{width:100%;height:100%;display:block}.kicker,.panel-heading p{margin:0;color:var(--muted);font-size:.82rem;font-weight:800;letter-spacing:0;text-transform:uppercase}h1{margin:2px 0 0;color:var(--ink);font-size:clamp(1.8rem,4vw,3.15rem);line-height:1;letter-spacing:0}.backend-pill{display:inline-flex;align-items:center;gap:8px;min-height:40px;padding:0 14px;border:1px solid #cce6d9;border-radius:999px;background:#f3fbf7;color:#13734d;font-size:.9rem;font-weight:800;white-space:nowrap}.tool-grid{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:20px;align-items:start}.download-panel,.side-panel{border:1px solid rgba(219,226,236,.9);border-radius:8px;background:#ffffffe6;box-shadow:var(--shadow);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px)}.download-panel{display:grid;gap:22px;min-height:590px;padding:26px}.panel-heading{display:flex;align-items:center;gap:14px}.source-badge{width:46px;height:46px;background:color-mix(in srgb,var(--accent) 82%,#172033)}.panel-heading h2{margin:2px 0 0;color:var(--ink);font-size:1.35rem;letter-spacing:0}.url-field,.control-block{display:grid;gap:10px}.url-field>span,.control-label{color:#283244;font-size:.92rem;font-weight:850}.input-wrap{display:grid;grid-template-columns:auto minmax(0,1fr) 44px;align-items:center;gap:12px;min-height:68px;padding:0 12px 0 18px;border:1px solid var(--line);border-radius:8px;background:var(--panel-muted);color:var(--muted)}.input-wrap:focus-within{border-color:color-mix(in srgb,var(--accent) 60%,var(--line));box-shadow:0 0 0 4px color-mix(in srgb,var(--accent) 14%,transparent)}.input-wrap input{width:100%;min-width:0;border:0;outline:0;background:transparent;color:var(--ink);font-size:1.05rem}.input-wrap input::placeholder{color:#98a3b3}.paste-button,.reset-button{display:grid;place-items:center;width:44px;height:44px;border:1px solid var(--line);border-radius:8px;background:#fff;color:#3b4657}.paste-button:hover,.reset-button:hover{border-color:color-mix(in srgb,var(--accent) 44%,var(--line));color:color-mix(in srgb,var(--accent) 72%,#172033)}.platform-tabs,.format-row,.action-row{display:grid;gap:10px}.platform-tabs{grid-template-columns:repeat(3,minmax(0,1fr))}.format-row{grid-template-columns:repeat(2,minmax(0,1fr))}.platform-tab,.format-option,.download-button,.support-item{display:inline-flex;align-items:center;justify-content:center;min-height:52px;border:1px solid var(--line);border-radius:8px;background:#fff;color:#253044;font-weight:850;transition:transform .16s ease,border-color .16s ease,background .16s ease,color .16s ease,box-shadow .16s ease}.platform-tab,.format-option,.download-button,.support-item{gap:9px}.platform-tab:hover,.format-option:hover,.support-item:hover{transform:translateY(-1px);border-color:color-mix(in srgb,var(--accent) 42%,var(--line))}.platform-tab.active,.format-option.active{border-color:color-mix(in srgb,var(--accent) 54%,#ffffff);background:color-mix(in srgb,var(--accent) 10%,#ffffff);color:color-mix(in srgb,var(--accent) 78%,#172033);box-shadow:inset 0 0 0 1px color-mix(in srgb,var(--accent) 18%,transparent)}.format-option:disabled{opacity:.42}.action-row{grid-template-columns:minmax(0,1fr) 52px;margin-top:auto}.download-button{min-height:58px;border:0;background:#151c2b;color:#fff;font-size:1.02rem}.download-button:not(:disabled):hover{transform:translateY(-1px);background:color-mix(in srgb,var(--accent) 42%,#151c2b);box-shadow:0 16px 34px color-mix(in srgb,var(--accent) 18%,transparent)}.download-button:disabled{opacity:.72}.reset-button{width:52px;height:58px}.side-panel{display:grid;gap:16px;padding:18px}.status-panel{display:grid;gap:12px;min-height:190px;padding:18px;border:1px solid color-mix(in srgb,var(--accent) 20%,var(--line));border-radius:8px;background:color-mix(in srgb,var(--accent) 7%,#ffffff)}.status-panel strong{color:var(--ink);font-size:1.04rem}.status-panel span{color:var(--muted);line-height:1.45}.status-panel.error{border-color:#efb5b5;background:#fff4f4}.status-panel.idle{background:#f8fbf9}.status-header{display:flex;justify-content:space-between;gap:16px}.progress-track{overflow:hidden;height:12px;border-radius:999px;background:#e6ecf4}.progress-bar{height:100%;border-radius:inherit;background:var(--accent);transition:width .22s ease}.task-label{overflow-wrap:anywhere;font-size:.82rem}.support-list{display:grid;gap:10px}.support-item{display:grid;grid-template-columns:22px minmax(0,1fr) 20px;width:100%;padding:0 14px;text-align:left}.support-item span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.support-item svg:last-child{color:#16a064}.support-item.active{border-color:color-mix(in srgb,var(--accent) 46%,var(--line));background:color-mix(in srgb,var(--accent) 9%,#ffffff)}.seo-content{width:min(1120px,100%);margin:34px auto 0;padding-bottom:36px}.seo-intro{max-width:780px;margin-bottom:18px}.seo-intro h2,.faq-section h2{margin:6px 0 12px;color:var(--ink);font-size:clamp(1.55rem,3vw,2.2rem);line-height:1.12;letter-spacing:0}.seo-intro p,.seo-grid p,.faq-section p{color:var(--muted);line-height:1.7}.seo-intro p{margin:0;font-size:1.02rem}.seo-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin-top:18px}.seo-grid article,.faq-section{border:1px solid rgba(219,226,236,.9);border-radius:8px;background:#ffffffb8}.seo-grid article{min-height:178px;padding:18px}.seo-grid h3{margin:0 0 10px;color:#1e293b;font-size:1rem;letter-spacing:0}.seo-grid p{margin:0}.faq-section{display:grid;gap:10px;margin-top:16px;padding:20px}.faq-section details{border-top:1px solid var(--line);padding-top:12px}.faq-section details:first-of-type{border-top:0;padding-top:0}.faq-section summary{color:#1e293b;font-weight:850;cursor:pointer}.faq-section p{margin:8px 0 0}.spin{animation:spin .9s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}@media(max-width:900px){.app-shell{padding:18px}.tool-grid{grid-template-columns:1fr}.download-panel{min-height:auto}.seo-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media(max-width:640px){.topbar{grid-template-columns:46px minmax(0,1fr)}.brand-mark{width:46px;height:46px}.backend-pill{grid-column:1 / -1;justify-content:center}.download-panel,.side-panel{padding:16px}.platform-tabs{grid-template-columns:1fr}.platform-tab{justify-content:flex-start;padding:0 14px}.input-wrap{min-height:62px}.seo-grid{grid-template-columns:1fr}}