:root {
  --bg: #f4f2ee;
  --surface: #ffffff;
  --text: #1c1b19;
  --muted: #5f5b54;
  --border: #d9d5cc;
  --accent: #1f5f4a;
  --accent-text: #ffffff;
  --focus: #2f7d63;
  --device: #2a2926;
  --radius: 10px;
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #161614;
    --surface: #211f1d;
    --text: #ece8e1;
    --muted: #a8a298;
    --border: #3a3733;
    --accent: #5fb393;
    --accent-text: #0f1a15;
    --focus: #7fcaa9;
    --device: #0b0b0a;
    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --bg: #161614;
  --surface: #211f1d;
  --text: #ece8e1;
  --muted: #a8a298;
  --border: #3a3733;
  --accent: #5fb393;
  --accent-text: #0f1a15;
  --focus: #7fcaa9;
  --device: #0b0b0a;
  color-scheme: dark;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
}

.wrap { max-width: 1040px; margin: 0 auto; padding: 0 16px; }

.site-header { padding: 32px 0 8px; }
.header-row { display: flex; gap: 16px; justify-content: space-between; align-items: flex-start; }
h1 { font-size: 1.75rem; line-height: 1.2; margin: 0 0 6px; letter-spacing: -0.01em; }
h2 { font-size: 1.1rem; margin: 0 0 12px; }
.lede { margin: 0; color: var(--muted); max-width: 60ch; }

.lang { display: flex; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; flex-shrink: 0; }
.lang button {
  border: 0; background: transparent; color: var(--muted); font: inherit; font-size: 0.85rem;
  padding: 6px 10px; cursor: pointer;
}
.lang button[aria-pressed="true"] { background: var(--text); color: var(--bg); }

.layout { margin-top: 20px; display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); gap: 16px; align-items: start; }
@media (max-width: 820px) { .layout { grid-template-columns: minmax(0, 1fr); } }

.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; }

fieldset { border: 0; padding: 0; margin: 0 0 20px; min-width: 0; }
legend { font-weight: 700; margin-bottom: 10px; padding: 0; }

label { display: block; margin-bottom: 12px; font-size: 0.92rem; }
label em { color: var(--muted); font-style: normal; font-size: 0.8rem; }
input[type="text"], input[type="tel"], input[type="email"], input[type="number"] {
  display: block; width: 100%; margin-top: 4px; padding: 9px 11px; font: inherit;
  color: var(--text); background: var(--bg); border: 1px solid var(--border); border-radius: 8px;
}
input:focus-visible, button:focus-visible, .segmented input:focus-visible + span {
  outline: 2px solid var(--focus); outline-offset: 2px;
}

.check { display: flex; gap: 8px; align-items: center; }
.check input { width: 18px; height: 18px; accent-color: var(--accent); margin: 0; }

.field { margin-bottom: 14px; }
.field-label { display: block; font-size: 0.92rem; margin-bottom: 6px; }

.segmented { display: inline-flex; flex-wrap: wrap; border: 1px solid var(--border); border-radius: 8px; overflow: hidden; }
.segmented label { margin: 0; }
.segmented input { position: absolute; opacity: 0; pointer-events: none; }
.segmented span { display: block; padding: 7px 12px; cursor: pointer; font-size: 0.9rem; color: var(--muted); }
.segmented input:checked + span { background: var(--text); color: var(--bg); }
.field-label em { color: var(--muted); font-style: normal; font-size: 0.8rem; }
.field.disabled .segmented { opacity: 0.45; }
.field.disabled .segmented span { cursor: not-allowed; }
.segmented.small span { padding: 5px 9px; font-size: 0.8rem; }

.privacy { margin: 0; font-size: 0.85rem; color: var(--muted); }

.preview-card { display: flex; flex-direction: column; align-items: center; gap: 12px; }
.preview-head { width: 100%; display: flex; flex-wrap: wrap; gap: 8px; justify-content: space-between; align-items: center; }
.preview-head h2 { margin: 0; }

.device { background: var(--device); padding: 18px 14px 34px; border-radius: 18px; width: 100%; max-width: 340px; }
.device canvas {
  display: block; width: 100%; height: auto; background: #fff; border-radius: 2px;
  image-rendering: pixelated;
}
.device.checker canvas {
  background-color: #fff;
  background-image: linear-gradient(45deg, #e6e6e6 25%, transparent 25%), linear-gradient(-45deg, #e6e6e6 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #e6e6e6 75%), linear-gradient(-45deg, transparent 75%, #e6e6e6 75%);
  background-size: 16px 16px; background-position: 0 0, 0 8px, 8px -8px, -8px 0;
}

.status { min-height: 1.5em; margin: 0; font-size: 0.88rem; color: var(--muted); text-align: center; }
.status.warn { color: #a3462d; }
@media (prefers-color-scheme: dark) { :root:not([data-theme="light"]) .status.warn { color: #f0a58c; } }

button.primary {
  border: 0; border-radius: 8px; padding: 11px 18px; font: inherit; font-weight: 600; cursor: pointer;
  background: var(--accent); color: var(--accent-text); width: 100%; max-width: 340px;
}
button.primary:disabled { opacity: 0.5; cursor: not-allowed; }

.howto { margin-top: 16px; }
.howto ol { margin: 0 0 12px; padding-left: 1.3em; }
.howto li { margin-bottom: 6px; }
.note { margin: 0; font-size: 0.88rem; color: var(--muted); }
code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 0.88em; }

.footer { padding: 24px 16px 40px; font-size: 0.82rem; color: var(--muted); }
.footer a { color: inherit; }

[hidden] { display: none !important; }