:root{color-scheme:light;--bg: #f6f8f9;--surface: #ffffff;--surface-2: #edf3f5;--text: #172126;--muted: #5f6f76;--line: #d8e1e5;--teal: #007a7a;--teal-dark: #005f62;--amber: #aa6a00;--red: #b42318;--green: #177245;--shadow: 0 10px 28px rgba(23, 33, 38, .08);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}:root[data-theme=dark]{color-scheme:dark;--bg: #111618;--surface: #192023;--surface-2: #232c30;--text: #eef4f5;--muted: #a9b8bd;--line: #344247;--teal: #2eb3ad;--teal-dark: #188d88;--amber: #f0b84a;--red: #ff8577;--green: #63d391;--shadow: 0 12px 32px rgba(0, 0, 0, .3)}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text)}button,input,a{font:inherit}button,.download-link{align-items:center;background:var(--surface);border:1px solid var(--line);border-radius:8px;color:var(--text);cursor:pointer;display:inline-flex;gap:8px;justify-content:center;min-height:38px;padding:8px 12px;text-decoration:none}input[type=number]{background:var(--surface);color:var(--text)}input[type=checkbox],input[type=range]{accent-color:var(--teal)}button:hover,.download-link:hover{border-color:var(--teal)}button:disabled,.download-link.disabled{cursor:not-allowed;opacity:.5}button.primary,.download-link{background:var(--teal);border-color:var(--teal);color:#fff}button.primary:hover,.download-link:hover{background:var(--teal-dark)}.app-shell{min-height:100vh;padding:20px}.topbar{align-items:center;display:flex;gap:16px;justify-content:space-between;margin:0 auto 16px;max-width:1440px}.topbar h1{font-size:28px;line-height:1.1;margin:0}.topbar p{color:var(--muted);margin:4px 0 0}.icon-button{flex:0 0 auto}.workspace{display:grid;gap:16px;grid-template-columns:minmax(260px,330px) minmax(380px,1fr) minmax(280px,340px);margin:0 auto;max-width:1440px}.left-column,.center-column,.right-column{display:flex;flex-direction:column;gap:16px;min-width:0}.panel{background:var(--surface);border:1px solid var(--line);border-radius:8px;box-shadow:var(--shadow);padding:14px}.panel-header{align-items:center;display:flex;gap:8px;margin-bottom:12px}.panel-header h2{font-size:15px;margin:0}.segmented{background:var(--surface-2);border-radius:8px;display:grid;gap:4px;grid-template-columns:repeat(2,1fr);padding:4px}.segmented button{background:transparent;border-color:transparent;min-height:36px}.segmented button.active{background:var(--surface);border-color:var(--line)}.segmented.compact{margin-bottom:12px}.drop-zone{align-items:center;border:1px dashed #a6b7bd;border-radius:8px;cursor:pointer;display:flex;gap:10px;justify-content:center;margin-top:12px;min-height:92px;padding:16px;position:relative}.drop-zone input{height:1px;opacity:0;overflow:hidden;position:absolute;width:1px}.drop-zone:focus-within{border-color:var(--teal);outline:3px solid rgba(0,122,122,.18);outline-offset:2px}video{aspect-ratio:16 / 9;background:#0f171a;border-radius:8px;display:block;width:100%}.field-grid{display:grid;gap:10px;grid-template-columns:repeat(2,1fr);margin-top:12px}label{color:var(--muted);display:grid;font-size:13px;gap:6px}input[type=number]{border:1px solid var(--line);border-radius:8px;min-height:38px;padding:8px 10px;width:100%}.button-row{align-items:center;display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}.download-size{align-items:center;background:var(--surface-2);border:1px solid var(--line);border-radius:999px;color:var(--muted);display:inline-flex;font-size:12px;font-weight:600;min-height:30px;padding:5px 9px;white-space:nowrap}.hint{color:var(--muted);font-size:13px;line-height:1.35;margin:10px 0 0}.hint.ok{color:var(--green)}.hint.warning{color:var(--amber)}.empty-state,.preview-empty{align-items:center;background:var(--surface-2);border-radius:8px;color:var(--muted);display:flex;gap:10px;justify-content:center;min-height:150px;padding:16px;text-align:center}.thumb-grid{display:grid;gap:8px;grid-template-columns:repeat(3,1fr)}.thumb-grid figure{margin:0;position:relative}.thumb-grid img{aspect-ratio:1;border-radius:8px;object-fit:cover;width:100%}.thumb-grid figcaption{background:#0000009e;border-radius:999px;color:#fff;font-size:12px;min-width:22px;padding:3px 6px;position:absolute;right:6px;top:6px;text-align:center}.preview-pane{align-items:center;background:#10181b;border-radius:8px;display:flex;justify-content:center;min-height:420px;overflow:hidden}.preview-pane img{max-height:100%;max-width:100%;object-fit:contain}.preview-empty{background:transparent;color:#c8d3d8;min-height:420px}.preset-grid{display:grid;gap:8px}.preset{align-items:flex-start;display:grid;gap:3px;justify-content:stretch;text-align:left}.preset.active{border-color:var(--teal);box-shadow:inset 0 0 0 1px var(--teal)}.preset small,.preset span{color:var(--muted)}.preset .preset-summary{color:var(--text)}.preset .preset-summary b{color:var(--teal);font-weight:700}.range-row{align-items:center;display:grid;gap:8px;grid-template-columns:64px 1fr 58px;margin-top:10px}.range-row output{color:var(--text);text-align:right}.checkbox-row{align-items:center;display:flex;gap:8px;margin-top:12px}.download-panel{box-shadow:none}.settings-backdrop{align-items:center;background:#090f1194;display:flex;top:0;right:0;bottom:0;left:0;justify-content:center;padding:20px;position:fixed;z-index:20}.settings-dialog{background:var(--surface);border:1px solid var(--line);border-radius:8px;box-shadow:var(--shadow);display:grid;gap:18px;max-width:420px;padding:18px;width:min(100%,420px)}.settings-header,.settings-label{align-items:center;display:flex;justify-content:space-between}.settings-header h2{font-size:18px;margin:0}.settings-header .icon-button{min-height:34px;padding:7px}.settings-group{display:grid;gap:10px}.settings-label{color:var(--muted);font-size:14px;gap:8px;justify-content:flex-start}.spin{animation:spin .9s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}@media(max-width:1060px){.topbar{align-items:flex-start}.workspace{grid-template-columns:1fr}.preview-pane,.preview-empty{min-height:320px}}