*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --color-bg: #f4f3f1;
  --color-surface: #ffffff;
  --color-border: #d6d3ce;
  --color-border-hover: #3d3a35;
  --color-ink: #1e1c1a;
  --color-accent: #3d3a35;
  --color-muted: #7a766f;

  --color-tag-music: #c2b8a3;
  --color-tag-sports: #a8bba3;
  --color-tag-tech: #a3afc2;
  --color-tag-community: #c2a3b8;

  --font-sans: 'DM Sans', system-ui, -apple-system, sans-serif;
  --font-size-xs: 0.6875rem;
  --font-size-sm: 0.8125rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.75rem;

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-12: 3rem;
  --space-16: 4rem;

  --transition: 140ms ease;
  --max-width: 1100px;
}

/* ── Base ── */

body {
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  background: var(--color-bg);
  color: var(--color-ink);
  -webkit-font-smoothing: antialiased;
}

main {
  flex: 1;
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-8) var(--space-6) var(--space-16);
}

/* ── Accessibility ── */

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
}

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

/* ── Header ── */

header {
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg);
  position: sticky;
  top: 0;
  z-index: 10;
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--space-4) var(--space-6);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
}

.wordmark {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.wordmark-domain {
  font-size: var(--font-size-xl);
  font-weight: 500;
  letter-spacing: -0.03em;
  line-height: 1;
  color: var(--color-ink);
}

.subtitle {
  font-size: var(--font-size-sm);
  color: var(--color-muted);
  font-weight: 400;
}

.lang-toggle {
  font-family: var(--font-sans);
  font-size: var(--font-size-xs);
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-muted);
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: 3px;
  padding: var(--space-1) var(--space-3);
  cursor: pointer;
  transition: color var(--transition), border-color var(--transition);
  white-space: nowrap;
}

.lang-toggle:hover {
  color: var(--color-ink);
  border-color: var(--color-accent);
}

/* ── Filter Bar ── */

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-8);
}

.filter-btn {
  font-family: var(--font-sans);
  font-size: var(--font-size-sm);
  font-weight: 400;
  color: var(--color-muted);
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: 3px;
  padding: var(--space-1) var(--space-3);
  cursor: pointer;
  transition: color var(--transition), border-color var(--transition), background var(--transition);
}

.filter-btn:hover {
  color: var(--color-ink);
  border-color: var(--color-accent);
}

.filter-btn.active,
.filter-btn[aria-pressed="true"] {
  color: var(--color-ink);
  border-color: var(--color-accent);
  background: var(--color-surface);
}

/* ── Cards Grid ── */

.cards-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-4);
}

@media (min-width: 580px) {
  .cards-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 900px) {
  .cards-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ── Card ── */

.card {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  padding: var(--space-6);
  border: 1px solid var(--color-border);
  border-radius: 4px;
  background: var(--color-surface);
  text-decoration: none;
  color: var(--color-ink);
  transition: border-color var(--transition), transform var(--transition);
}

.card:hover {
  border-color: var(--color-border-hover);
  transform: translateY(-2px);
}

.card-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-2);
}

.card-name {
  font-size: var(--font-size-lg);
  font-weight: 500;
  line-height: 1.2;
}

.card-tag {
  font-size: var(--font-size-xs);
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 2px var(--space-2);
  border-radius: 2px;
  white-space: nowrap;
  flex-shrink: 0;
}

.card-tag[data-category="music"]     { background: var(--color-tag-music); }
.card-tag[data-category="sports"]    { background: var(--color-tag-sports); }
.card-tag[data-category="tech"]      { background: var(--color-tag-tech); }
.card-tag[data-category="community"] { background: var(--color-tag-community); }

.card-desc {
  font-size: var(--font-size-sm);
  color: var(--color-muted);
  line-height: 1.55;
  flex: 1;
}

.card-url {
  font-size: var(--font-size-xs);
  color: var(--color-muted);
  letter-spacing: 0.01em;
  margin-top: auto;
}

/* ── Hidden (filtered out) ── */

.card[data-hidden] {
  display: none;
}

/* ── Footer ── */

footer {
  border-top: 1px solid var(--color-border);
  padding: var(--space-4) var(--space-6);
  display: flex;
  justify-content: center;
  gap: var(--space-2);
  font-size: var(--font-size-xs);
  color: var(--color-muted);
}

/* ── Dark mode override ── */

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #161412;
    --color-surface: #1e1c1a;
    --color-border: #2e2b27;
    --color-border-hover: #a09890;
    --color-ink: #ede9e4;
    --color-accent: #a09890;
    --color-muted: #6b6460;

    --color-tag-music: #3a3228;
    --color-tag-sports: #263028;
    --color-tag-tech: #252a36;
    --color-tag-community: #32262e;
  }
}