/* ============================================================
   dctownson.com — component & layout styles
   Depends on: tokens.css
   ============================================================ */

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  scroll-behavior: auto;
  overflow-anchor: none;
}

body {
  font-family: var(--font-family-sans);
  background-color: var(--color-bg-default);
  color: var(--color-fg-default);
  min-height: 100vh;
  transition: background-color 0.2s ease, color 0.2s ease;
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

/* ── Web components ──────────────────────────────────── */
site-nav { display: block; }

/* ── Layout ──────────────────────────────────────────── */
.page {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ── Staggered fade-up animation ─────────────────────── */
.anim {
  opacity: 0;
  transform: translateY(16px);
  animation: fade-up 0.5s ease forwards;
  will-change: transform, opacity;
  backface-visibility: hidden;
}

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

.anim-1 { animation-delay: 0.05s; }
.anim-2 { animation-delay: 0.15s; }
.anim-3 { animation-delay: 0.25s; }
.anim-4 { animation-delay: 0.35s; }
.anim-5 { animation-delay: 0.45s; }
.anim-6 { animation-delay: 0.55s; }

/* ── Ghost tooltip ────────────────────────────────────── */
[data-tip] { position: relative; }

[data-tip]::after {
  content: attr(data-tip);
  position: absolute;
  bottom: calc(100% + 4px);
  left: 50%;
  transform: translateX(-50%) translateY(2px);
  background: transparent;
  color: var(--color-fg-muted);
  font-family: var(--font-family-mono);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  letter-spacing: var(--font-tracking-wide);
  white-space: nowrap;
  padding: 4px 12px;
  border-radius: var(--radius-md);
  border: none;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.15s ease, transform 0.15s ease;
  z-index: 10;
}

[data-tip]:hover::after {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ── Homepage nav ────────────────────────────────────── */
nav.home-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 32px 0 24px;
  border-bottom: 1px solid var(--color-border-default);
  margin-bottom: 72px;
}

/* ── Case study nav ──────────────────────────────────── */
nav.cs-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--color-bg-default);
  border-bottom: 1px solid var(--color-border-default);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: background-color 0.2s ease;
  padding: 0;
  margin-bottom: 0;
}

/* ── Shared nav inner ────────────────────────────────── */
.nav-inner {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 24px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.nav-left {
  display: flex;
  align-items: center;
  gap: 20px;
}

.nav-logo {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  object-fit: cover;
  transition: transform 0.25s ease;
  cursor: pointer;
}

.nav-logo:hover {
  transform: scale(1.12);
}

.nav-divider {
  width: 1px;
  height: 20px;
  background: var(--color-border-default);
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-links a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  color: var(--color-fg-muted);
  transition: color 0.15s ease, background-color 0.15s ease;
}

.nav-links a:hover {
  color: var(--color-fg-default);
  background-color: var(--color-bg-subtle);
}

.nav-links a svg {
  width: 22px;
  height: 22px;
}

.nav-right {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.nav-back {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--color-fg-muted);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  transition: color 0.15s ease;
  flex-shrink: 0;
  text-decoration: none;
}

.nav-back:hover { color: var(--color-fg-default); }
.nav-back svg { width: 16px; height: 16px; flex-shrink: 0; }

.nav-title {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-fg-subtle);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ── Theme Toggle ────────────────────────────────────── */
.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border-default);
  background: transparent;
  color: var(--color-fg-muted);
  cursor: pointer;
  transition: color 0.15s ease, background-color 0.15s ease;
}

.theme-toggle:hover {
  color: var(--color-fg-default);
  background-color: var(--color-bg-subtle);
}

.theme-toggle svg { width: 16px; height: 16px; }

.icon-sun  { display: none; }
.icon-moon { display: flex; }
[data-theme="light"] .icon-sun  { display: flex; }
[data-theme="light"] .icon-moon { display: none; }

/* ── Hero ────────────────────────────────────────────── */
.hero { margin-bottom: 64px; }

.hero h1 {
  font-size: var(--font-size-5xl);
  font-weight: var(--font-weight-bold);
  line-height: var(--font-leading-tight);
  letter-spacing: var(--font-tracking-tight);
  color: var(--color-fg-default);
  margin-bottom: 16px;
}

.hero p {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-normal);
  line-height: var(--font-leading-relaxed);
  color: var(--color-fg-muted);
  max-width: 480px;
  margin-bottom: 20px;
}

.hero-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

/* ── Pills ───────────────────────────────────────────── */
.tag {
  font-family: var(--font-family-mono);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  letter-spacing: var(--font-tracking-wide);
  color: var(--color-fg-muted);
  padding: 4px 10px;
  border-radius: var(--radius-full);
  background: var(--color-bg-subtle);
  white-space: nowrap;
}

/* ── Section label ───────────────────────────────────── */
.section-label {
  font-family: var(--font-family-mono);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-medium);
  letter-spacing: var(--font-tracking-widest);
  color: var(--color-fg-subtle);
  text-transform: uppercase;
  margin-bottom: 24px;
}

/* ── Card grid ───────────────────────────────────────── */
.card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-bottom: 80px;
}

.card {
  display: flex;
  flex-direction: column;
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border-default);
  background-color: var(--color-surface-raised);
  overflow: hidden;
  text-decoration: none;
  color: inherit;
  transition: border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover,
.card.is-hovered {
  border-color: transparent;
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.18);
}

[data-theme="dark"] .card:hover,
[data-theme="dark"] .card.is-hovered {
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.5);
}

.card.disabled {
  opacity: 0.4;
  cursor: default;
  pointer-events: none;
}

/* ── Card media ──────────────────────────────────────── */
.card-media {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background-color: var(--color-bg-muted);
  align-items: flex-start;
}

.card-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.3s ease;
}

.card:hover .card-image,
.card.is-hovered .card-image {
  transform: scale(1.02);
}

.card-logo {
  display: block;
  margin: 0;
  height: 22px;
  width: auto;
  object-fit: contain;
  filter: brightness(0) invert(1);
  opacity: 0.9;
}

html[data-theme="light"] .card-logo {
  filter: brightness(0);
  opacity: 0.65;
}

/* ── Card body ───────────────────────────────────────── */
.card-body {
  padding: 14px 16px 16px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
}

.card-type {
  font-family: var(--font-family-mono);
  font-size: 11px;
  font-weight: var(--font-weight-medium);
  letter-spacing: var(--font-tracking-wider);
  text-transform: uppercase;
  color: var(--color-fg-subtle);
}

.card-title {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  line-height: var(--font-leading-snug);
  color: var(--color-fg-default);
}

.card-desc {
  font-size: var(--font-size-sm);
  color: var(--color-fg-muted);
}

/* ── Footer ──────────────────────────────────────────── */
footer {
  padding: 32px 0 48px;
  border-top: 1px solid var(--color-border-default);
}

.footer-built {
  font-family: var(--font-family-mono);
  font-size: var(--font-size-sm);
  line-height: var(--font-leading-relaxed);
  color: var(--color-fg-subtle);
  margin-bottom: 4px;
}

.footer-built a {
  color: var(--color-fg-muted);
  border-bottom: 1px solid var(--color-border-default);
  transition: color 0.15s ease, border-color 0.15s ease;
}

.footer-built a:hover {
  color: var(--color-fg-default);
  border-color: var(--color-border-strong);
}

.footer-copy {
  font-family: var(--font-family-mono);
  font-size: var(--font-size-sm);
  color: var(--color-fg-subtle);
}