:root{--accent:#f59e0b;--border:#d9e2ec;--ink:#102033;--muted:#526172;--page-pad:clamp(20px, 5vw, 72px);--panel:#fff;--primary:#2563eb;--soft:#8aa0b8;--success:#14b8a6;--surface:#f6f9fc;--surface-strong:#edf4fb;--mono:"SFMono-Regular", Consolas, "Liberation Mono", monospace;--sans:Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;color:var(--ink);font-family:var(--sans);font-synthesis:none;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;font-size:16px;line-height:1.5}*{box-sizing:border-box}html{scroll-behavior:smooth;background:#fff}body{min-width:320px;margin:0}button,a{touch-action:manipulation}a:focus-visible,button:focus-visible{outline-offset:3px;outline:3px solid #f59e0bb8}::selection{background:#2563eb2e}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}.site-header{border-bottom:1px solid var(--border);min-height:72px;padding:0 var(--page-pad);z-index:20;-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);background:#ffffffeb;justify-content:space-between;align-items:center;gap:24px;display:flex;position:sticky;top:0}.brand,.site-header nav,.site-header nav button,.quick-checks span,.local-badge,.queue-toolbar span,.queue-toolbar button,.panel-title,.primary-action,.secondary-action,.folder-display strong,.notice,.download-link{align-items:center;display:inline-flex}.brand{color:var(--ink);gap:10px;font-weight:850;text-decoration:none}.brand-mark{background:var(--primary);color:#fff;border-radius:8px;justify-content:center;align-items:center;width:40px;height:40px;display:inline-flex}.site-header nav{gap:8px}.site-header nav button{color:var(--muted);cursor:pointer;font:inherit;background:0 0;border:0;border-radius:8px;min-height:44px;padding:10px 16px;font-weight:750}.site-header nav button:hover,.site-header nav button:focus-visible,.site-header nav button.active{background:var(--surface-strong);color:var(--ink)}.site-header nav button:disabled{cursor:not-allowed;opacity:.45}.hero-section{min-height:calc(100dvh - 72px);padding:72px var(--page-pad) 64px;grid-template-columns:minmax(0,.95fr) minmax(340px,.85fr);gap:52px;display:grid}.hero-copy{align-self:center;max-width:760px}.eyebrow{color:var(--primary);letter-spacing:0;text-transform:uppercase;margin:0 0 14px;font-size:.82rem;font-weight:850}h1{color:var(--ink);max-width:820px;margin:0;font-size:clamp(2.75rem,7vw,5.9rem);line-height:.98}.hero-text{color:var(--muted);max-width:680px;margin:28px 0 0;font-size:1.12rem;line-height:1.8}.quick-checks{flex-wrap:wrap;gap:12px;margin-top:32px;display:flex}.quick-checks span{border:1px solid var(--border);color:var(--ink);background:#fff;border-radius:8px;gap:9px;min-height:44px;padding:0 14px}.quick-checks svg{color:var(--success)}.converter-panel,.queue-panel,.settings-panel{background:var(--panel);border:1px solid var(--border);border-radius:8px;box-shadow:0 24px 70px #0f172a1a}.converter-panel{align-self:center;padding:24px}.panel-heading{justify-content:space-between;align-items:start;gap:18px;display:flex}h2{color:var(--ink);margin:0;font-size:clamp(2rem,4vw,3.3rem);line-height:1.08}.local-badge{color:#0f766e;background:#14b8a61a;border:1px solid #14b8a647;border-radius:999px;flex:none;gap:7px;min-height:34px;padding:0 12px;font-size:.88rem;font-weight:800}.drop-zone{background:linear-gradient(135deg, #2563eb14, #14b8a614), var(--surface);color:var(--primary);cursor:pointer;font:inherit;text-align:center;border:1px dashed #2563eb73;border-radius:8px;flex-direction:column;justify-content:center;align-items:center;gap:12px;width:100%;min-height:270px;margin-top:22px;padding:24px;display:flex}.drop-zone.has-files{align-items:stretch;min-height:340px}.drop-zone:hover{border-color:var(--primary)}.drop-zone.is-dragging{background:linear-gradient(135deg, #2563eb24, #14b8a624), var(--surface);border-color:var(--primary);box-shadow:inset 0 0 0 2px #2563eb2e}.drop-zone strong{color:var(--ink);font-size:1.25rem}.drop-zone span{color:var(--muted)}.drop-file-list{gap:8px;width:100%;max-height:190px;margin-top:8px;display:grid;overflow:auto}.drop-file-row{border:1px solid var(--border);color:var(--ink);text-align:left;background:#ffffffd1;border-radius:8px;grid-template-columns:20px minmax(0,1fr) auto;align-items:center;gap:10px;min-height:44px;padding:8px 10px;display:grid}.drop-file-row span{color:var(--ink);text-overflow:ellipsis;white-space:nowrap;overflow:hidden}.drop-file-row em{color:var(--muted);font-size:.88rem;font-style:normal}.control-grid{grid-template-columns:1fr 1fr;gap:14px;margin-top:18px;display:grid}.folder-display{border:1px solid var(--border);border-radius:8px;gap:10px;min-width:0;margin:0;padding:14px;display:grid}.folder-display>span{color:var(--muted);font-size:.92rem;font-weight:750}.control-grid p,.folder-display p{color:var(--muted);margin:0;font-size:.9rem;line-height:1.55}.folder-display strong{color:var(--ink);gap:8px}.notice{color:#92400e;background:#f59e0b1a;border:1px solid #f59e0b47;border-radius:8px;gap:9px;margin-top:18px;padding:12px 14px;line-height:1.55}.primary-action{background:var(--primary);color:#fff;cursor:pointer;font:inherit;border:0;border-radius:8px;justify-content:center;gap:10px;width:100%;min-height:54px;margin-top:18px;font-weight:850}.inline-action{width:auto;margin-top:0}.secondary-action{border:1px solid var(--border);color:var(--ink);cursor:pointer;font:inherit;background:#fff;border-radius:8px;justify-content:center;min-height:54px;padding:0 18px;font-weight:850}.primary-action:disabled{cursor:not-allowed;opacity:.55}.workspace-section{background:var(--surface);padding:84px var(--page-pad)}.section-heading{max-width:720px}.queue-layout{grid-template-columns:minmax(0,1.35fr) minmax(280px,.65fr);gap:22px;margin-top:34px;display:grid}.queue-panel,.settings-panel{box-shadow:none;padding:22px}.queue-toolbar{justify-content:space-between;align-items:center;gap:14px;display:flex}.queue-toolbar span{color:var(--ink);gap:8px;font-weight:850}.queue-toolbar button{border:1px solid var(--border);color:var(--muted);cursor:pointer;font:inherit;background:#fff;border-radius:8px;gap:8px;min-height:44px;padding:0 14px;font-weight:750}.queue-toolbar button:disabled{cursor:not-allowed;opacity:.5}.file-list{gap:12px;margin-top:20px;display:grid}.file-row{border:1px solid var(--border);background:#fff;border-radius:8px;grid-template-columns:46px minmax(0,1fr) minmax(120px,auto) 44px;align-items:center;gap:14px;min-height:78px;padding:14px;display:grid}.file-icon{background:var(--surface-strong);color:var(--primary);border-radius:8px;justify-content:center;align-items:center;width:46px;height:46px;display:inline-flex}.file-row h3{color:var(--ink);overflow-wrap:anywhere;margin:0 0 4px;font-size:1rem}.file-row p{color:var(--muted);margin:0}.file-row strong{color:var(--primary);white-space:nowrap;font-size:.92rem}.file-row .status-unsupported,.file-row .status-failed{color:#b45309}.file-row .status-converted{color:#0f766e}.file-row .status-converting{color:var(--primary)}.icon-button{border:1px solid var(--border);color:var(--muted);cursor:pointer;background:#fff;border-radius:8px;justify-content:center;align-items:center;width:44px;height:44px;display:inline-flex}.download-button{color:var(--primary);text-decoration:none}.icon-button:hover{color:#b91c1c}.download-button:hover{color:#1d4ed8}.empty-state{border:1px dashed var(--border);color:var(--muted);text-align:center;background:#fff;border-radius:8px;flex-direction:column;justify-content:center;align-items:center;gap:8px;min-height:210px;padding:24px;display:flex}.empty-state strong{color:var(--ink)}.panel-title{color:var(--ink);gap:10px}.panel-title h3{margin:0;font-size:1.2rem}.format-list{gap:10px;margin-top:20px;display:grid}.format-list button{border:1px solid var(--border);color:var(--ink);cursor:pointer;font:inherit;text-align:left;background:#fff;border-radius:8px;min-height:46px;padding:0 14px;font-weight:800}.format-list button.active{color:var(--primary);background:#2563eb1a;border-color:#2563eb59}.summary-box{background:var(--surface);color:var(--muted);border-radius:8px;gap:8px;margin-top:20px;padding:18px;display:grid}.summary-box strong{color:var(--ink);font-size:1.35rem}.summary-box p{margin:0;line-height:1.65}.download-page{background:var(--surface);min-height:calc(100dvh - 72px);padding:72px var(--page-pad)}.download-hero{border:1px solid var(--border);background:#fff;border-radius:8px;padding:clamp(24px,5vw,48px);box-shadow:0 24px 70px #0f172a14}.download-hero h1{font-size:clamp(2.4rem,6vw,5rem)}.download-hero p{color:var(--muted);margin:22px 0 0;font-size:1.08rem;line-height:1.75}.download-actions{flex-wrap:wrap;gap:12px;margin-top:28px;display:flex}.download-list{gap:12px;margin-top:26px;display:grid}.download-row{border:1px solid var(--border);background:#fff;border-radius:8px;grid-template-columns:46px minmax(0,1fr) auto;align-items:center;gap:14px;min-height:82px;padding:16px;display:grid}.download-row h3{color:var(--ink);overflow-wrap:anywhere;margin:0 0 4px;font-size:1.02rem}.download-row p{color:var(--muted);margin:0}.download-link{color:var(--primary);background:#2563eb1a;border:1px solid #2563eb40;border-radius:8px;justify-content:center;gap:8px;min-height:44px;padding:0 14px;font-weight:850;text-decoration:none}.privacy-band{background:var(--ink);color:#fff;padding:42px var(--page-pad);grid-template-columns:minmax(260px,.75fr) minmax(0,1fr);align-items:center;gap:28px;display:grid}.privacy-band>div{align-items:center;gap:14px;display:flex}.privacy-band h2{color:#fff;font-size:clamp(1.7rem,3vw,2.6rem)}.privacy-band p{color:#dbeafe;margin:0;line-height:1.75}footer{color:var(--muted);padding:30px var(--page-pad);justify-content:space-between;align-items:center;display:flex}.sr-only{clip:rect(0, 0, 0, 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}@media (width<=900px){.site-header{flex-direction:column;align-items:flex-start;gap:12px;padding-top:14px;padding-bottom:14px;position:static}.site-header nav{flex-wrap:wrap;width:100%}.site-header nav button{text-align:center;flex:auto;justify-content:center}.hero-section,.queue-layout,.privacy-band{grid-template-columns:1fr}.hero-section,.download-page{min-height:auto;padding-top:48px}}@media (width<=560px){.site-header{gap:10px;padding-left:16px;padding-right:16px}.brand{font-size:.98rem}.brand-mark{width:36px;height:36px}.site-header nav{gap:6px}.site-header nav button{min-height:42px;padding:8px 12px}.hero-section{gap:28px;padding:36px 16px 44px}h1{font-size:clamp(2.15rem,12vw,3.4rem);line-height:1.05}h2{font-size:clamp(1.75rem,9vw,2.4rem)}.hero-text{margin-top:18px;font-size:1rem;line-height:1.65}.quick-checks{gap:8px;margin-top:22px}.quick-checks span{flex:calc(50% - 8px);justify-content:center;min-height:42px;padding:0 10px;font-size:.9rem}.converter-panel,.queue-panel,.settings-panel,.download-hero{border-radius:8px;padding:16px}.panel-heading{flex-direction:column;align-items:flex-start;gap:12px}.local-badge{align-self:flex-start}.drop-zone{gap:10px;min-height:230px;padding:18px 14px}.drop-zone.has-files{min-height:300px}.drop-zone strong{font-size:1.08rem;line-height:1.35}.drop-zone>span{font-size:.92rem;line-height:1.55}.drop-file-list{max-height:170px}.drop-file-row{grid-template-columns:20px minmax(0,1fr);min-height:48px}.drop-file-row em{grid-column:2}.control-grid{grid-template-columns:1fr}.notice{align-items:flex-start;font-size:.92rem}.primary-action,.secondary-action{width:100%;min-height:50px}.workspace-section,.download-page{padding:44px 16px}.queue-layout{gap:16px;margin-top:22px}.file-row,.download-row{grid-template-columns:46px minmax(0,1fr);gap:12px;padding:12px}.download-link{grid-column:2;justify-self:start;width:100%}.file-row strong,.file-row .icon-button{grid-column:2}.file-row .icon-button{justify-self:start}.download-actions,.queue-toolbar,footer{flex-direction:column;align-items:flex-start}.queue-toolbar button{justify-content:center;width:100%}.download-hero p{font-size:1rem;line-height:1.65}.download-actions{gap:10px}footer{gap:8px;padding:24px 16px}}@media (width<=380px){.quick-checks span{flex-basis:100%}.hero-section,.workspace-section,.download-page{padding-left:12px;padding-right:12px}.converter-panel,.queue-panel,.settings-panel,.download-hero{padding:14px}}