:root { color-scheme:light; --ink:#20242b; --muted:#626a77; --line:#e2e5e9; --surface:#fff; --background:#f7f8fa; --accent:#9b7621; --accent-dark:#765a16; font-family:Raleway,"Segoe UI",system-ui,sans-serif; }
* { box-sizing:border-box; }
html { min-height:100%; background:var(--background); }
body { min-height:100vh; margin:0; display:flex; flex-direction:column; color:var(--ink); background:var(--background); }
a { color:inherit; }
button,input { font:inherit; }
:focus-visible { outline:3px solid var(--accent); outline-offset:3px; }
.app-header { min-height:76px; padding:9px max(22px,calc((100vw - 1120px)/2)); display:flex; justify-content:space-between; align-items:center; gap:20px; background:#fff; border-bottom:1px solid var(--line); }
.brand { width:min(230px,52vw); display:block; }
.brand img { display:block; width:100%; height:auto; }
.app-header nav { display:flex; align-items:center; gap:18px; }
.app-header nav a,.back-link { color:var(--accent-dark); font-weight:700; text-decoration:none; }
.install-button,.primary-button,.secondary-button,.tool-button { min-height:40px; padding:8px 13px; border:1px solid var(--line); border-radius:6px; background:#fff; color:var(--ink); font-weight:700; cursor:pointer; }
.install-button,.primary-button { border-color:var(--accent); background:var(--accent); color:#fff; }
.install-button:hover,.primary-button:hover { background:var(--accent-dark); }
.secondary-button:hover,.tool-button:hover { background:#f4f1e9; }
.secondary-button:disabled { opacity:.5; cursor:not-allowed; }
.page { flex:1; width:min(100% - 36px,1100px); margin:0 auto; padding:25px 0 48px; }
.back-link { display:inline-block; margin:0 0 24px; }
.intro { margin:0 0 24px; }
.eyebrow { margin:0 0 8px; color:var(--accent-dark); font-size:.74rem; font-weight:800; letter-spacing:.13em; text-transform:uppercase; }
h1,h2,p { margin-top:0; }
h1 { margin-bottom:10px; font-family:Cinzel,Georgia,serif; font-size:clamp(2rem,5vw,3.3rem); line-height:1.14; }
.intro>p:last-child,.canvas-note,.privacy-note { color:var(--muted); line-height:1.6; }
.intro>p:last-child { max-width:790px; margin-bottom:0; font-size:1.02rem; }
.panel { padding:16px; background:var(--surface); border:1px solid var(--line); border-radius:12px; box-shadow:0 8px 28px rgb(25 34 48 / 4%); }
.toolbar { display:flex; align-items:center; flex-wrap:wrap; gap:10px; }
.canvas-controls,.custom-ratio-controls,.tool-switch,.history-controls { display:flex; align-items:center; flex-wrap:wrap; gap:6px; }
.zoom-controls { display:flex; align-items:center; gap:5px; }
.zoom-value { min-width:42px; color:var(--ink); text-align:center; font-size:.78rem; font-variant-numeric:tabular-nums; }
.aspect-control select,.custom-ratio-controls input { min-height:34px; padding:5px 8px; border:1px solid var(--line); border-radius:5px; background:#fff; color:var(--ink); font:inherit; }
.aspect-control select { min-width:88px; }
.custom-ratio-controls { align-items:end; }
.custom-ratio-controls[hidden] { display:none; }
.custom-ratio-controls input { width:70px; }
.ratio-separator { padding-bottom:7px; color:var(--muted); font-weight:700; }
.tool-button.active { border-color:var(--accent); background:#f4f1e9; color:var(--accent-dark); }
.control { display:grid; gap:4px; color:var(--muted); font-size:.8rem; font-weight:700; }
.brush-control select { min-height:34px; min-width:112px; padding:5px 24px 5px 8px; border:1px solid var(--line); border-radius:5px; background:#fff; color:var(--ink); font:inherit; }
.color-control { justify-items:center; }
.color-control input { width:42px; height:34px; padding:2px; border:1px solid var(--line); border-radius:5px; background:#fff; cursor:pointer; }
.size-control { width:min(190px,100%); }
.smoothing-control { width:min(150px,100%); }
.size-control span { display:flex; justify-content:space-between; gap:8px; }
.smoothing-control span { display:flex; justify-content:space-between; gap:8px; }
.size-control output { color:var(--ink); }
.size-control input,.smoothing-control input { width:100%; accent-color:var(--accent); }
.touch-toggle { min-height:40px; display:flex; align-items:center; gap:8px; color:var(--ink); font-size:.86rem; font-weight:650; cursor:pointer; }
.touch-toggle input { width:18px; height:18px; accent-color:var(--accent); }
.history-controls { margin-left:auto; }
.pad-status { min-height:1.4em; margin:12px 2px 8px; color:var(--muted); font-size:.86rem; }
.canvas-wrap { display:flex; align-items:flex-start; justify-content:flex-start; overflow:auto; border:1px solid #d6d9df; border-radius:7px; background:#fff; box-shadow:inset 0 1px 3px rgb(25 34 48 / 5%); }
#sketch-canvas { display:block; flex:0 0 auto; max-width:none; max-height:none; margin:auto; aspect-ratio:var(--canvas-ratio, 3 / 2); background:#fff; touch-action:none; cursor:crosshair; }
.panel:fullscreen { width:100vw; height:100vh; height:100dvh; display:flex; flex-direction:column; padding:10px; border:0; border-radius:0; box-shadow:none; }
.panel:fullscreen .toolbar { flex:0 0 auto; gap:8px; }
.panel:fullscreen .canvas-wrap { flex:1 1 auto; min-height:0; }
.panel:fullscreen .canvas-note { display:none; }
.panel:fullscreen .pad-status { flex:0 0 auto; margin:7px 2px; }
.canvas-note { margin:9px 2px 0; font-size:.81rem; }
.privacy-note { margin:16px 0 0; text-align:center; font-size:.88rem; }
.toast { position:fixed; right:16px; bottom:16px; z-index:3; max-width:min(420px,calc(100vw - 32px)); padding:12px 16px; color:#fff; background:#252a32; border-radius:7px; opacity:0; pointer-events:none; transform:translateY(8px); transition:opacity .16s ease,transform .16s ease; }
.toast.visible { opacity:1; transform:translateY(0); }
[hidden] { display:none !important; }
@media(max-width:720px) {
    .app-header { min-height:66px; padding:8px 14px; gap:8px; }
    .brand { width:min(190px,47vw); }
    .app-header nav { gap:10px; }
    .app-header nav a { font-size:.84rem; }
    .app-header .install-button { min-height:38px; padding:7px 10px; font-size:.82rem; }
    .page { width:min(100% - 24px,1100px); padding-top:17px; }
    .panel { padding:10px; }
    .toolbar { gap:8px; }
    .history-controls { margin-left:0; }
    .toolbar>.primary-button { margin-left:auto; }
    .canvas-controls { width:100%; }
    .history-controls { margin-left:0; }
}
@media(max-width:480px) {
    .panel:fullscreen { padding:7px; }
    .panel:fullscreen .toolbar { gap:6px; }
    .panel:fullscreen .history-controls { margin-left:0; }
    .panel:fullscreen .fullscreen-button { margin-left:auto; }
}