:root {
  --bg: #f4ede3;
  --bg-strong: #eadcc8;
  --ink: #112031;
  --ink-soft: rgba(17, 32, 49, 0.72);
  --paper: rgba(255, 250, 244, 0.86);
  --line: rgba(17, 32, 49, 0.12);
  --accent: #cc5b31;
  --accent-strong: #a5441f;
  --shadow: 0 24px 60px rgba(53, 38, 24, 0.12);
  --radius-xl: 32px;
  --radius-lg: 24px;
  --radius-md: 18px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Avenir Next", "Segoe UI", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(
      circle at top left,
      rgba(204, 91, 49, 0.18),
      transparent 28%
    ),
    radial-gradient(
      circle at right 15%,
      rgba(17, 32, 49, 0.14),
      transparent 32%
    ),
    linear-gradient(180deg, #fbf7f0 0%, var(--bg) 48%, #f8f2e8 100%);
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

code,
textarea,
input,
select,
button {
  font: inherit;
}

.page-shell {
  width: min(1180px, calc(100vw - 32px));
  margin: 0 auto;
  padding: 24px 0 72px;
  min-height: 100vh;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  padding: 12px 0 20px;
}

.brand {
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.panel {
  background: var(--paper);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.4);
  box-shadow: var(--shadow);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: 999px;
  border: 0;
  padding: 14px 22px;
  cursor: pointer;
  transition:
    transform 180ms ease,
    background 180ms ease,
    color 180ms ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button.primary {
  background: var(--accent);
  color: #fff7f1;
}

.button.ghost {
  background: rgba(17, 32, 49, 0.08);
  color: var(--ink);
}

.button.small {
  padding: 8px 12px;
  font-size: 0.88rem;
  margin-top: 6px;
}

/* ── Form grid ── */

.form-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.form-grid .span-2 {
  grid-column: span 2;
}

.field-group {
  display: grid;
  gap: 6px;
}

.field-group > label:first-child:not(.color-control) {
  color: var(--ink-soft);
  font-size: 0.88rem;
}

.units-fieldset {
  border: 0;
  padding: 0;
  margin: 0;
}

.units-fieldset legend {
  color: var(--ink-soft);
  font-size: 0.88rem;
  margin-bottom: 6px;
}

.unit-checks {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.unit-checks label {
  display: flex;
  align-items: center;
  gap: 5px;
  cursor: pointer;
  color: var(--ink);
  font-size: 0.92rem;
}

.unit-checks input[type="checkbox"] {
  width: auto;
  accent-color: var(--accent);
}

.submit-cell {
  display: flex;
  align-items: end;
  justify-content: flex-end;
}

input,
select,
textarea {
  width: 100%;
  border-radius: 12px;
  border: 1px solid rgba(17, 32, 49, 0.16);
  background: rgba(255, 255, 255, 0.86);
  color: var(--ink);
  padding: 10px 12px;
}

input[type="color"] {
  position: absolute;
  inset: 0;
  opacity: 0;
  cursor: pointer;
}

.color-control {
  position: relative;
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  padding: 8px 12px;
  border-radius: 12px;
  border: 1px solid rgba(17, 32, 49, 0.16);
  background: rgba(255, 255, 255, 0.86);
  color: var(--ink);
  cursor: pointer;
}

.color-chip {
  width: 24px;
  height: 24px;
  flex: 0 0 24px;
  border-radius: 50%;
  border: 2px solid rgba(17, 32, 49, 0.16);
  background: var(--color-preview, #000000);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.45);
}

.color-value {
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-size: 0.88rem;
}

/* ── Output row ── */

.output-row {
  display: grid;
  gap: 18px;
  margin-top: 18px;
}

.preview-card {
  border-radius: var(--radius-lg);
  background:
    linear-gradient(135deg, rgba(17, 32, 49, 0.08), rgba(204, 91, 49, 0.1)),
    #fffaf4;
  border: 1px dashed rgba(17, 32, 49, 0.2);
  padding: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.preview-card img {
  max-width: 100%;
  border-radius: 12px;
  background: #fff;
  /* width: 100%; */
}

.output-stack {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  align-content: start;
}

.output-block {
  display: grid;
  gap: 4px;
}

.output-block label {
  color: var(--ink-soft);
  font-size: 0.85rem;
}

textarea {
  resize: vertical;
  min-height: 140px;
  font-size: 0.82rem;
}

/* ── Responsive ── */

@media (max-width: 960px) {
  .form-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .form-grid .span-2 {
    grid-column: span 2;
  }
}

@media (max-width: 640px) {
  .page-shell {
    width: min(100vw - 20px, 100%);
    padding-top: 14px;
  }

  .form-grid {
    grid-template-columns: 1fr;
  }

  .form-grid .span-2 {
    grid-column: span 1;
  }

  .output-row {
    grid-template-columns: 1fr;
  }

  .panel {
    padding: 16px;
  }
}