@import url("https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,600&family=Space+Grotesk:wght@400;600&display=swap");

:root {
  color-scheme: light;
  --bg: #f3efe7;
  --bg-deep: #e6dccd;
  --bg-highlight: #fff6e3;
  --ink: #1e1c16;
  --muted: #6e675b;
  --accent: #f05742;
  --card: #fcfbf7;
  --field: #fffdf8;
  --stroke: #d7cbb8;
  --empty-bg: #fff2df;
  --empty-border: #e4b98b;
  --shadow: 0 18px 40px rgba(23, 20, 15, 0.12);
  --toast-bg: #1e1c16;
  --toast-text: #ffffff;
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #13110e;
  --bg-deep: #0b0a08;
  --bg-highlight: #1f1b15;
  --ink: #f5f1e8;
  --muted: #b6ad9d;
  --accent: #ff8a6a;
  --card: #1c1812;
  --field: #15120e;
  --stroke: #3b3327;
  --empty-bg: #1e1811;
  --empty-border: #4a3d2c;
  --shadow: 0 18px 40px rgba(0, 0, 0, 0.45);
  --toast-bg: #f3efe7;
  --toast-text: #1c1812;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    color-scheme: dark;
    --bg: #13110e;
    --bg-deep: #0b0a08;
    --bg-highlight: #1f1b15;
    --ink: #f5f1e8;
    --muted: #b6ad9d;
    --accent: #ff8a6a;
    --card: #1c1812;
    --field: #15120e;
    --stroke: #3b3327;
    --empty-bg: #1e1811;
    --empty-border: #4a3d2c;
    --shadow: 0 18px 40px rgba(0, 0, 0, 0.45);
    --toast-bg: #f3efe7;
    --toast-text: #1c1812;
  }
}

@keyframes fade-up {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Space Grotesk", "Helvetica Neue", sans-serif;
  color: var(--ink);
  background: radial-gradient(circle at top left, var(--bg-highlight) 0%, var(--bg) 45%, var(--bg-deep) 100%);
  min-height: 100vh;
}

.site-footer {
  text-align: center;
  padding: 10px 16px 28px;
  color: var(--muted);
  font-size: 12px;
}

.site-footer p {
  margin: 0;
}

.page {
  padding: 48px 20px 72px;
  max-width: 1100px;
  margin: 0 auto;
}

.hero {
  text-align: left;
  margin-bottom: 32px;
}

.hero-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 12px;
  color: var(--muted);
  margin: 0;
}

.theme-toggle {
  border: 1px solid var(--stroke);
  background: var(--card);
  color: var(--ink);
  font-size: 12px;
  padding: 8px 12px;
  border-radius: 999px;
  cursor: pointer;
  transition: transform 0.2s ease, border 0.2s ease, box-shadow 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.theme-toggle .toggle-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.theme-toggle svg {
  width: 16px;
  height: 16px;
  display: none;
}

.theme-toggle[data-active="light"] .icon-moon,
.theme-toggle[data-active="dark"] .icon-sun {
  display: inline-block;
}

.theme-toggle:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.12);
}

.theme-toggle:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

h1 {
  font-family: "Fraunces", "Georgia", serif;
  font-size: clamp(32px, 6vw, 54px);
  margin: 0 0 12px;
}

.lede {
  max-width: 640px;
  font-size: 18px;
  line-height: 1.5;
  margin: 0;
  color: var(--muted);
}

.layout {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
  align-items: start;
}

.panel {
  background: var(--card);
  border: 1px solid var(--stroke);
  border-radius: 18px;
  padding: 20px;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  min-height: 320px;
  animation: fade-up 0.5s ease both;
}

.panel-header h2 {
  font-size: 18px;
  margin: 0 0 6px;
}

.panel-header p {
  margin: 0 0 14px;
  color: var(--muted);
  font-size: 14px;
}

textarea {
  flex: 1;
  min-height: 220px;
  resize: vertical;
  border: 1px solid var(--stroke);
  border-radius: 14px;
  padding: 14px;
  font-size: 14px;
  font-family: "Space Grotesk", "Helvetica Neue", sans-serif;
  background: var(--field);
  color: var(--ink);
  box-shadow: inset 0 0 0 1px rgba(0, 0, 0, 0);
  transition: border 0.2s ease, box-shadow 0.2s ease;
}

textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: inset 0 0 0 1px var(--accent);
}

.panel-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  margin-top: 12px;
  color: var(--muted);
}

.hint {
  font-style: italic;
}

.contrast-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  color: var(--muted);
  margin-top: 6px;
}

.output {
  position: relative;
}

.empty {
  margin-top: 20px;
  padding: 16px;
  border-radius: 14px;
  background: var(--empty-bg);
  color: var(--muted);
  border: 1px dashed var(--empty-border);
}

.swatches {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 14px;
  margin-top: 12px;
}

.contrast-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 14px;
  margin-top: 12px;
}

.contrast-card {
  border: 1px solid var(--stroke);
  border-radius: 14px;
  padding: 12px;
  background: var(--card);
  display: grid;
  gap: 10px;
  animation: fade-up 0.35s ease both;
}

.contrast-samples {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
}

.sample {
  height: 38px;
  border-radius: 10px;
  border: 1px solid var(--stroke);
  background: var(--sample);
}

.contrast-meta {
  display: grid;
  gap: 6px;
  font-size: 12px;
}

.contrast-pair {
  color: var(--muted);
  font-weight: 600;
  letter-spacing: 0.02em;
}

.contrast-ratio {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.ratio-value {
  font-weight: 600;
}

.badge {
  padding: 3px 8px;
  border-radius: 999px;
  font-size: 11px;
  border: 1px solid var(--stroke);
  background: var(--field);
  color: var(--ink);
}

.badge.aaa {
  background: #d9f4d8;
  border-color: #88c78a;
  color: #22552a;
}

.badge.aa {
  background: #e4efff;
  border-color: #9fb8f0;
  color: #1f3f78;
}

.badge.aa-large {
  background: #fff1cc;
  border-color: #f2c56d;
  color: #6a4600;
}

.badge.fail {
  background: #fde2e2;
  border-color: #f0a2a2;
  color: #7b1f1f;
}

.swatch {
  appearance: none;
  padding: 0;
  border: 1px solid var(--stroke);
  border-radius: 14px;
  background: var(--card);
  overflow: hidden;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  text-align: left;
  width: 100%;
  animation: fade-up 0.35s ease both;
}

.swatch:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.1);
}

.swatch:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.chip {
  height: 90px;
  background: var(--swatch);
  border-bottom: 1px solid var(--stroke);
}

.meta {
  padding: 10px 12px 12px;
  display: grid;
  gap: 6px;
  font-size: 12px;
}

.hex {
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.rgb {
  color: var(--muted);
}

.toast {
  position: absolute;
  right: 24px;
  bottom: 24px;
  background: var(--toast-bg);
  color: var(--toast-text);
  padding: 10px 14px;
  border-radius: 999px;
  font-size: 12px;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 720px) {
  .page {
    padding: 36px 16px 60px;
  }

  .hero-top {
    flex-direction: column;
    align-items: flex-start;
  }

  .panel-footer {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }

  .contrast-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
  }
}