:root {
  --ink: #11161d;
  --ink-soft: #4b5563;
  --rule: #e5e7eb;
  --bg: #ffffff;
  --max: 72rem;
  --radius: 14px;
  --shadow: 0 1px 2px rgba(17, 22, 29, 0.06), 0 8px 24px rgba(17, 22, 29, 0.04);
  --accent: #1f6feb;
  --surface: #f4f8ff;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue",
    Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

code {
  font-family:
    ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  background: rgba(17, 22, 29, 0.05);
  padding: 0.1em 0.35em;
  border-radius: 4px;
  font-size: 0.92em;
}

/* ---------- Index ---------- */

.page-index {
  padding: 4rem 1.5rem 6rem;
}

.site-header,
.design-grid,
.site-footer {
  max-width: var(--max);
  margin-inline: auto;
}

.site-header {
  text-align: left;
  margin-bottom: 3rem;
}

.site-header__eyebrow {
  margin: 0 0 0.5rem;
  font-size: 0.85rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
}

.site-header__title {
  margin: 0 0 1rem;
  font-size: clamp(2rem, 4vw, 3rem);
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.site-header__lede {
  margin: 0;
  max-width: 48rem;
  font-size: 1.125rem;
  color: var(--ink-soft);
}

.design-grid {
  display: grid;
  gap: 1.25rem;
  grid-template-columns: repeat(auto-fill, minmax(20rem, 1fr));
}

.design-card {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1.5rem;
  background: var(--surface);
  border: 1px solid var(--rule);
  border-left: 4px solid var(--accent);
  border-radius: var(--radius);
  color: var(--ink);
  box-shadow: var(--shadow);
  transition: transform 120ms ease, box-shadow 120ms ease;
}

.design-card:hover {
  transform: translateY(-2px);
  text-decoration: none;
  box-shadow:
    0 1px 2px rgba(17, 22, 29, 0.08),
    0 12px 32px rgba(17, 22, 29, 0.08);
}

.design-card__index {
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
}

.design-card__title {
  margin: 0;
  font-size: 1.25rem;
  letter-spacing: -0.01em;
}

.design-card__tagline {
  margin: 0;
  color: var(--ink-soft);
  flex: 1;
}

.design-card__cta {
  margin-top: 0.75rem;
  font-weight: 600;
  color: var(--accent);
}

.site-footer {
  margin-top: 4rem;
  color: var(--ink-soft);
  font-size: 0.9rem;
}

/* ---------- Design ---------- */

.page-design {
  padding: 3rem 1.5rem 5rem;
  background:
    linear-gradient(180deg, var(--surface) 0, transparent 16rem),
    var(--bg);
}

.design-header,
.design-body,
.design-footer {
  max-width: 56rem;
  margin-inline: auto;
}

.design-header {
  border-left: 4px solid var(--accent);
  padding-left: 1.25rem;
  margin-bottom: 2.5rem;
}

.design-header__eyebrow {
  margin: 0 0 0.5rem;
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 600;
}

.design-header__title {
  margin: 0 0 0.75rem;
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  letter-spacing: -0.02em;
  line-height: 1.15;
}

.design-header__tagline {
  margin: 0;
  color: var(--ink-soft);
  font-size: 1.125rem;
}

.design-body {
  display: grid;
  gap: 2.5rem;
}

.design-body h2 {
  margin: 0 0 0.75rem;
  font-size: 1.25rem;
  letter-spacing: -0.01em;
}

.design-body p {
  margin: 0;
  color: var(--ink-soft);
}

.design-body ul {
  margin: 0;
  padding-left: 1.25rem;
  color: var(--ink-soft);
}

.design-body li + li {
  margin-top: 0.4rem;
}

.mock {
  display: grid;
  gap: 0.75rem;
  padding: 1.25rem;
  border: 1px dashed var(--rule);
  border-radius: var(--radius);
  background: var(--bg);
}

.mock__nav,
.mock__hero,
.mock__tile {
  border-radius: 8px;
  background: linear-gradient(120deg, var(--surface), var(--bg));
  border: 1px solid var(--rule);
}

.mock__nav {
  height: 2.5rem;
}

.mock__hero {
  height: 9rem;
  background: linear-gradient(120deg, var(--accent), var(--surface));
  opacity: 0.85;
}

.mock__row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
}

.mock__tile {
  height: 5.5rem;
}

.design-footer {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--rule);
}