:root {
  color-scheme: dark;
  --bg: #101316;
  --bg-soft: #131a21;
  --panel: #182129;
  --panel-2: #202b34;
  --text: #edf3f7;
  --muted: #a9b6c2;
  --line: #33404c;
  --accent: #f2b84b;
  --accent-2: #2fb3a3;
  --link: #9ed7ff;
  --danger: #ff7474;
  --good: #7bd88f;
  --shadow: 0 18px 45px rgba(0, 0, 0, 0.32);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: radial-gradient(circle at top left, rgba(47, 179, 163, 0.13), transparent 32%),
    radial-gradient(circle at top right, rgba(242, 184, 75, 0.12), transparent 30%), var(--bg);
  color: var(--text);
  font-family: Arial, Helvetica, sans-serif;
  line-height: 1.5;
}

a { color: var(--link); text-decoration: none; }
a:hover { color: #fff; text-decoration: underline; }
.container { width: min(1120px, calc(100% - 32px)); margin: 0 auto; }

.site-header { background: rgba(16, 19, 22, 0.92); border-bottom: 1px solid var(--line); }
.nav-wrap { min-height: 70px; display: flex; align-items: center; justify-content: space-between; gap: 18px; flex-wrap: wrap; }
.logo { color: var(--text); font-size: 1.35rem; font-weight: 800; }
.logo span { color: var(--accent); }
.main-nav { display: flex; gap: 18px; flex-wrap: wrap; }
.main-nav a { color: var(--text); font-weight: 700; }

.tool-page-main { padding: 48px 0 78px; }
.breadcrumb { color: var(--muted); margin-bottom: 18px; }
.eyebrow { color: var(--accent-2); font-size: 0.78rem; font-weight: 800; margin: 0 0 10px; text-transform: uppercase; }
h1, h2, h3, p { margin-top: 0; }
h1 { font-size: clamp(2.25rem, 5vw, 4.25rem); line-height: 1.06; margin-bottom: 16px; }
h2 { font-size: clamp(1.45rem, 3vw, 2.2rem); line-height: 1.1; margin-bottom: 14px; }
.tool-intro, .faq p, .muted { color: var(--muted); }

.tool-panel, .tool-card, .result-box, .faq {
  background: linear-gradient(180deg, var(--panel), var(--bg-soft));
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  padding: 24px;
}

.grid-2 { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.stack { display: grid; gap: 14px; }
.section-gap { margin-top: 22px; }

label { display: block; font-weight: 800; margin-bottom: 6px; }
textarea, input, select {
  width: 100%;
  background: #0c1116;
  border: 1px solid var(--line);
  color: var(--text);
  font: inherit;
  padding: 12px;
}
textarea { min-height: 190px; resize: vertical; font-family: Consolas, Monaco, monospace; }
input, select { min-height: 44px; }

.actions { display: flex; flex-wrap: wrap; gap: 10px; margin: 14px 0; }
button, .btn {
  min-height: 42px;
  border-radius: 8px;
  border: 1px solid var(--line);
  cursor: pointer;
  font: inherit;
  font-weight: 800;
  padding: 9px 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
button.primary, .btn-primary { background: var(--accent); color: #1b1f23; }
button.secondary, .btn-secondary { background: var(--panel-2); color: var(--text); }

.status { min-height: 24px; color: var(--good); font-weight: 800; }
.status.error { color: var(--danger); }
.result-value { color: var(--accent); font-size: 1.35rem; font-weight: 900; overflow-wrap: anywhere; }
.result-detail { color: var(--muted); margin-bottom: 0; }
.output-row { display: grid; grid-template-columns: 92px minmax(0, 1fr) 78px; gap: 8px; align-items: end; }
.output-row input { font-family: Consolas, Monaco, monospace; }

.swatch { min-height: 74px; border: 1px solid var(--line); }
.drop-zone { border: 2px dashed var(--line); padding: 22px; text-align: center; background: #0c1116; }
.drop-zone input { margin-top: 10px; }

details { background: #0c1116; border: 1px solid var(--line); margin: 10px 0; padding: 12px; }
summary { color: var(--accent); cursor: pointer; font-weight: 800; }
.site-footer { background: rgba(16, 19, 22, 0.84); border-top: 1px solid var(--line); padding: 26px 0; }
.footer-wrap { color: var(--muted); display: flex; justify-content: space-between; gap: 18px; flex-wrap: wrap; }

@media (max-width: 820px) {
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .output-row { grid-template-columns: 1fr; }
}