:root{--brand-yellow: #f9d117;--brand-blue: #2196f3;--bg: #f6f8fb;--panel: #ffffff;--panelBorder: rgba(15, 23, 42, .12);--text: rgba(15, 23, 42, .95);--muted: rgba(15, 23, 42, .64);--accent: var(--brand-blue);--danger: #f97373;--shadow: 0 14px 40px rgba(2, 6, 23, .12);--radius: 14px;color-scheme:light}*{box-sizing:border-box}html,body{height:100%}body{margin:0;font-family:Open Sans,ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;background:radial-gradient(1100px 680px at 15% -10%,rgba(249,209,23,.18) 0%,transparent 60%),radial-gradient(1000px 640px at 95% 0%,rgba(33,150,243,.12) 0%,transparent 60%),var(--bg);color:var(--text)}input,button{font:inherit}.appShell{min-height:100%;display:grid;grid-template-rows:auto 1fr}.appHeader{background:#fff;box-shadow:0 2px 8px #0000001a;position:sticky;top:0;z-index:100}.appHeader__logoRow{padding:10px 22px}.appHeader__logo{display:inline-flex;align-items:center;text-decoration:none}.appHeader__logo img{height:36px;width:auto;display:block}.appHeader__nav{background:#fff;border-top:1px solid rgba(15,23,42,.08);border-bottom:1px solid rgba(15,23,42,.08);padding:0 22px;display:flex;align-items:center}.appHeader__navLink{font-size:13px;font-weight:400;color:var(--brand-blue);text-decoration:none;padding:9px 12px;white-space:nowrap;display:inline-block;transition:color .15s}.appHeader__navLink:hover{color:#1565c0}.appHeader__bar{background:var(--brand-blue)}.appHeader__barInner{padding:6px 22px;display:flex;align-items:center;gap:10px}.appHeader__barTitle{font-size:11px;font-weight:700;color:#ffffffe6;text-transform:uppercase;letter-spacing:.05em}.appHeader__barStep{font-size:12px;color:#ffffffbf}@media(max-width:640px){.appHeader__navLink{font-size:12px;padding:7px 8px}}.appFooter{background:#1c3a6c;margin-top:40px;padding:16px 22px;text-align:center}.appFooter__links{display:flex;justify-content:center;align-items:center;gap:28px;flex-wrap:wrap;margin-bottom:8px}.appFooter__links a{color:#ffffffd9;text-decoration:none;font-size:13px;font-weight:400;transition:color .15s}.appFooter__links a:hover{color:#fff}.appFooter__copy{font-size:13px;font-weight:400;color:#ffffff80}.appMain{padding:18px;max-width:1240px;width:100%;margin:0 auto}.panel{background:var(--panel);border:1px solid var(--panelBorder);border-radius:var(--radius);box-shadow:var(--shadow)}.configLayout{display:grid;grid-template-columns:minmax(520px,1.25fr) minmax(340px,.75fr);gap:14px;align-items:start}@media(max-width:980px){.configLayout{grid-template-columns:1fr}}@media(max-width:640px){.appMain{padding:10px}.appHeader{padding:12px 14px}.sidePanel{position:static}.segmentRow{grid-template-columns:1fr}.toolbar{gap:6px}.btn{padding:8px 10px;font-size:13px}}.editorPanel{padding:14px}.sidePanel{padding:14px;position:sticky;top:14px}.toolbar{display:flex;flex-wrap:wrap;gap:10px;align-items:center;justify-content:space-between;margin-bottom:12px}.toolbar__left,.toolbar__right{display:flex;gap:10px;align-items:center;flex-wrap:wrap}.btn{border:1px solid rgba(6,115,215,.28);background:linear-gradient(135deg,var(--brand-blue),#0a8cf2);color:#fff;padding:9px 12px;border-radius:12px;cursor:pointer}.btn:hover{border-color:#0673d773;filter:brightness(1.05)}.btn:disabled{opacity:.5;cursor:not-allowed}.btn--danger{border-color:#ef444438;background:linear-gradient(135deg,#ef4444f2,#f43f5ef2)}.btn--danger:hover{border-color:#ef444457;filter:brightness(1.03)}.btn--sm{padding:5px 9px;font-size:12px;border-radius:9px}.btn--ghost{background:transparent;border-color:#0f172a2e;color:#0f172ab3}.btn--ghost:hover{background:#0f172a0d;border-color:#0f172a47;filter:none}.btn--cta{border-color:#16a34a59;background:linear-gradient(135deg,#16a34a,#15803d);font-weight:650;letter-spacing:.2px}.btn--cta:hover{border-color:#16a34a8c;filter:brightness(1.06)}.uploadLabel{display:inline-flex;align-items:center;gap:10px;padding:9px 12px;border-radius:12px;border:1px dashed rgba(6,115,215,.35);background:#0673d70f}.uploadLabel input[type=file]{display:none}.hint{color:var(--muted);font-size:13px;line-height:1.45}.editorFrame{width:100%;aspect-ratio:4 / 3;border-radius:12px;border:1px solid rgba(15,23,42,.14);overflow:hidden;background:#0206170a;position:relative}.segmentList{display:grid;gap:10px;margin-top:10px}.segmentRow{display:grid;grid-template-columns:1fr 140px;gap:10px;align-items:center;padding:10px;border-radius:12px;border:1px solid rgba(15,23,42,.12);background:linear-gradient(135deg,#0673d70f,#f9d11714)}.segmentRow__label{font-size:13px;color:var(--muted)}.segmentRow input{width:100%;padding:9px 10px;border-radius:10px;border:1px solid rgba(15,23,42,.16);background:#fff;color:#0f172af2}.pill{display:inline-flex;align-items:center;gap:8px;font-size:12px;color:#0f172ae6;border:1px solid rgba(15,23,42,.12);padding:6px 10px;border-radius:999px;background:linear-gradient(135deg,var(--brand-yellow),color-mix(in srgb,var(--brand-yellow) 70%,#ffffff 30%))}