:root {
  --bg: #f4f5f8;
  --surface: #ffffff;
  --surface-2: #f8f9fb;
  --border: #e3e6ec;
  --text: #161a23;
  --muted: #5e6675;
  --accent: #2f5bea;
  --accent-ink: #ffffff;
  --accent-soft: #e8eefe;
  --ok: #148a4a;
  --warn: #b45309;
  --bad: #c0262d;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(16, 24, 40, .05), 0 4px 16px rgba(16, 24, 40, .05);
  --checker: #e9ebf0;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1218;
    --surface: #171b23;
    --surface-2: #1d222c;
    --border: #2b313d;
    --text: #e8ebf1;
    --muted: #9aa3b2;
    --accent: #6b8cff;
    --accent-ink: #0b0e14;
    --accent-soft: #222c47;
    --ok: #4ade80;
    --warn: #fbbf24;
    --bad: #f87171;
    --shadow: none;
    --checker: #262b35;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

.wrap { max-width: 1180px; margin: 0 auto; padding: 0 16px; }

/* Header */
.site-header { background: var(--surface); border-bottom: 1px solid var(--border); }
.header-inner { display: flex; align-items: center; gap: 16px; height: 60px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 18px; color: var(--text); text-decoration: none; }
.brand svg { width: 26px; height: 26px; fill: var(--accent); }
.tagline { color: var(--muted); font-size: 13px; }
.header-link { margin-left: auto; }
[hidden] { display: none !important; }

/* Layout */
.layout { display: grid; grid-template-columns: minmax(0, 1fr) 380px; gap: 24px; padding-top: 24px; padding-bottom: 48px; align-items: start; }
.preview-col { position: sticky; top: 16px; }

.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); padding: 20px; margin-bottom: 20px; }
.card h2 { display: flex; align-items: center; gap: 10px; font-size: 17px; margin: 0 0 16px; }
.step { display: inline-grid; place-items: center; width: 26px; height: 26px; border-radius: 50%; background: var(--accent); color: var(--accent-ink); font-size: 13px; }

/* Type picker */
.type-grid { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 8px; }
.type-btn {
  padding: 10px 6px; border: 1px solid var(--border); border-radius: 10px; background: var(--surface-2);
  color: var(--text); font: inherit; font-weight: 500; cursor: pointer;
}
.type-btn:hover { border-color: var(--accent); }
.type-btn.active { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }

/* Forms */
.content-form { display: none; }
.content-form.active { display: block; }

label { display: block; font-size: 13px; font-weight: 600; color: var(--muted); margin-bottom: 12px; }
input[type=text], input[type=email], input[type=tel], input[type=search], input[type=password], input[type=datetime-local], textarea, select {
  display: block; width: 100%; margin-top: 5px; padding: 9px 11px; font: inherit; font-weight: 400;
  color: var(--text); background: var(--surface); border: 1px solid var(--border); border-radius: 9px;
}
textarea { resize: vertical; }
input:focus, textarea:focus, select:focus { outline: 2px solid var(--accent); outline-offset: -1px; border-color: transparent; }
input[type=range] { display: block; width: 100%; margin-top: 10px; accent-color: var(--accent); }

label.check { display: flex; align-items: center; gap: 8px; font-weight: 500; color: var(--text); font-size: 14px; }
label.check input { width: 16px; height: 16px; accent-color: var(--accent); margin: 0; }

.row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.row.three { grid-template-columns: repeat(3, 1fr); }
.hint { font-size: 12.5px; color: var(--muted); margin: -4px 0 12px; }
.sub { padding: 12px 12px 0; margin: -4px 0 14px; background: var(--surface-2); border-radius: 10px; }
.sub[hidden] { display: none; }

.color { display: flex; align-items: center; gap: 8px; margin-top: 5px; padding: 4px 10px 4px 4px; border: 1px solid var(--border); border-radius: 9px; background: var(--surface); }
.color input { width: 34px; height: 28px; padding: 0; border: 0; background: none; cursor: pointer; }
.color output { font: 500 13px ui-monospace, Consolas, monospace; color: var(--text); text-transform: uppercase; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px; padding: 9px 14px;
  font: inherit; font-weight: 600; color: var(--text); background: var(--surface-2);
  border: 1px solid var(--border); border-radius: 10px; cursor: pointer; text-decoration: none;
}
.btn:hover { border-color: var(--accent); }
a.icon-btn { text-decoration: none; }
.btn.primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); padding: 12px; font-size: 16px; }
.btn.primary:hover { filter: brightness(1.08); }
.btn.ghost { background: transparent; }
.btn.block { width: 100%; }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px; margin-top: 8px; }

/* Presets & tabs */
.presets { display: flex; flex-wrap: wrap; align-items: center; gap: 6px; margin-bottom: 16px; }
.presets-label { font-size: 13px; font-weight: 600; color: var(--muted); margin-right: 4px; }
.chip { padding: 5px 12px; border-radius: 999px; border: 1px solid var(--border); background: var(--surface-2); color: var(--text); font: inherit; font-size: 13px; cursor: pointer; }
.chip:hover { border-color: var(--accent); background: var(--accent-soft); }

.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--border); margin-bottom: 16px; overflow-x: auto; }
.tab { padding: 9px 14px; border: 0; border-bottom: 2px solid transparent; background: none; color: var(--muted); font: inherit; font-weight: 600; cursor: pointer; white-space: nowrap; }
.tab.active { color: var(--accent); border-bottom-color: var(--accent); }
.panel { display: none; }
.panel.active { display: block; }

/* Frame picker */
.frame-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 8px; margin-bottom: 16px; }
.frame-opt { display: flex; flex-direction: column; align-items: center; gap: 6px; padding: 10px 4px; margin: 0; border: 1px solid var(--border); border-radius: 10px; cursor: pointer; font-weight: 500; font-size: 12px; text-align: center; }
.frame-opt input { position: absolute; opacity: 0; pointer-events: none; }
.frame-opt:has(input:checked) { border-color: var(--accent); background: var(--accent-soft); color: var(--text); }
.frame-opt:has(input:focus-visible) { outline: 2px solid var(--accent); }
.fp { position: relative; display: block; width: 40px; height: 52px; }
.fp::before { content: ""; position: absolute; left: 8px; top: 8px; width: 24px; height: 24px; background:
  repeating-conic-gradient(var(--text) 0 25%, transparent 0 50%) 0 0 / 8px 8px; opacity: .8; }
.fp-none::before { top: 14px; }
.fp-bottom { border: 3px solid var(--text); border-radius: 5px; border-bottom-width: 14px; }
.fp-bottom::before { left: 5px; top: 5px; }
.fp-top { border: 3px solid var(--text); border-radius: 5px; border-top-width: 14px; }
.fp-top::before { left: 5px; top: 5px; }
.fp-bubble::after { content: ""; position: absolute; left: 4px; right: 4px; bottom: 0; height: 10px; border-radius: 4px; background: var(--text); }
.fp-bubble { border-top: 0; }
.fp-bubble::before { top: 4px; outline: 3px solid var(--text); outline-offset: 2px; }
.fp-outline::before { top: 6px; outline: 3px solid var(--text); outline-offset: 3px; }
.fp-outline::after { content: ""; position: absolute; left: 8px; right: 8px; bottom: 4px; height: 4px; border-radius: 2px; background: var(--text); }

/* Logo */
.logo-drop { border: 2px dashed var(--border); border-radius: 12px; padding: 18px; text-align: center; margin-bottom: 16px; }
.logo-drop.drag { border-color: var(--accent); background: var(--accent-soft); }
.logo-drop p { margin: 0 0 10px; }
.logo-drop .hint { margin: 10px 0 0; }
.logo-set { display: flex; align-items: center; justify-content: center; gap: 16px; }
.logo-set[hidden], .logo-empty[hidden] { display: none; }
.logo-set img { width: 64px; height: 64px; object-fit: contain; border-radius: 8px; background: var(--surface-2); }

/* Preview */
.preview {
  display: grid; place-items: center; aspect-ratio: 1; padding: 16px; border-radius: 12px;
  background: repeating-conic-gradient(var(--checker) 0 25%, var(--surface) 0 50%) 0 0 / 20px 20px;
}
.preview svg { width: 100%; height: auto; max-height: 100%; display: block; }
.preview .empty { color: var(--muted); text-align: center; padding: 24px; }
.meta { font-size: 12.5px; color: var(--muted); text-align: center; margin: 10px 0 4px; min-height: 18px; }

.checks { list-style: none; padding: 0; margin: 8px 0 16px; font-size: 13px; }
.checks li { display: flex; gap: 8px; padding: 6px 10px; border-radius: 8px; margin-bottom: 4px; background: var(--surface-2); }
.checks li::before { font-weight: 700; }
.checks li.ok { color: var(--ok); }
.checks li.ok::before { content: "✓"; }
.checks li.warn { color: var(--warn); }
.checks li.warn::before { content: "!"; }
.checks li.bad { color: var(--bad); }
.checks li.bad::before { content: "✕"; }

.download .hint { margin: 10px 0 0; text-align: center; }

/* Toast */
.toast {
  position: fixed; left: 50%; bottom: 24px; transform: translate(-50%, 20px); opacity: 0; pointer-events: none;
  background: var(--text); color: var(--bg); padding: 10px 18px; border-radius: 10px; font-weight: 500;
  transition: opacity .2s, transform .2s; max-width: calc(100% - 32px);
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* Responsive */
@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; }
  .preview-col { position: static; order: -1; }
  .preview-card { max-width: 480px; margin-left: auto; margin-right: auto; }
  .tagline { display: none; }
}
@media (max-width: 560px) {
  .type-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .frame-grid { grid-template-columns: repeat(3, 1fr); }
  .row, .row.three { grid-template-columns: 1fr; gap: 0; }
  .card { padding: 16px; }
}