/* sasoriken portfolio — design tokens & global styles */

:root {
  /* Base: sepia mid-tones */
  --color-bg-primary:   #F2E7D3;
  --color-bg-secondary: #E8D9BF;
  --color-bg-tertiary:  #D9C7AB;
  --color-border:       #C9B492;

  /* Text */
  --color-text-primary:   #3A2A18;
  --color-text-secondary: #6B5A40;
  --color-text-tertiary:  #8B7A5E;

  /* Accent: amber / yellow-brown */
  --color-accent:       #B8722B;
  --color-accent-hover: #9A5E22;
  --color-accent-soft:  #E4B477;

  /* Status colors */
  --color-active:    #6B8E4E;
  --color-wip:       #B8722B;
  --color-archived:  #8B7A5E;
  --color-maintained:#6B8E4E;
  --color-paused:    #8B7A5E;

  /* Featured highlight */
  --color-featured-border: #B8722B;
  --color-featured-glow:   rgba(184, 114, 43, 0.18);

  /* Fonts */
  --font-sans: "Inter", "Plus Jakarta Sans", "Noto Sans JP",
               -apple-system, BlinkMacSystemFont,
               "Helvetica Neue", Arial, sans-serif;
  --font-display: "Plus Jakarta Sans", "Inter", "Noto Sans JP",
                  -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: "JetBrains Mono", "Fira Code", "Noto Sans Mono",
               Consolas, monospace;

  /* Font sizes */
  --font-size-xs:  12px;
  --font-size-sm:  14px;
  --font-size-base: 16px;
  --font-size-lg:  18px;
  --font-size-xl:  24px;
  --font-size-2xl: 32px;
  --font-size-3xl: 48px;
  --font-size-hero: 72px;

  /* Spacing */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;
  --space-9: 96px;

  /* Layout */
  --content-max: 1280px;
  --reading-max: 800px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;

  /* Header height */
  --header-h: 72px;
  --header-h-compact: 56px;

  /* Shadows (sepia-tinted) */
  --shadow-sm: 0 1px 2px rgba(58, 42, 24, 0.06);
  --shadow-md: 0 4px 12px rgba(58, 42, 24, 0.10);
  --shadow-lg: 0 8px 24px rgba(58, 42, 24, 0.14);
  --shadow-featured: 0 0 0 1px var(--color-featured-border),
                     0 6px 20px var(--color-featured-glow);

  /* Animation */
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
  --dur-fast: 120ms;
  --dur-med: 200ms;
  --dur-slow: 400ms;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--color-bg-primary);
  color: var(--color-text-primary);
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-image:
    linear-gradient(180deg, rgba(232, 217, 191, 0.4) 0%, transparent 240px),
    radial-gradient(ellipse at 80% -10%, rgba(228, 180, 119, 0.28), transparent 60%);
}

main { flex: 1; }

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--dur-fast) var(--ease);
}
a:hover { color: var(--color-accent-hover); }
a:focus-visible {
  outline: 2px solid var(--color-accent-soft);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--color-text-primary);
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 0 0 var(--space-4);
}
h1 { font-size: var(--font-size-3xl); }
h2 { font-size: var(--font-size-2xl); }
h3 { font-size: var(--font-size-xl); }

p { margin: 0 0 var(--space-4); }

img { max-width: 100%; display: block; }

code, kbd, .mono {
  font-family: var(--font-mono);
  font-size: 0.92em;
  background: var(--color-bg-secondary);
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  color: var(--color-text-secondary);
}

/* Layout container */
.container {
  width: 100%;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 0 var(--space-5);
}

.container--reading {
  max-width: 920px;
}

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-h);
  background: rgba(242, 231, 211, 0.85);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  border-bottom: 1px solid transparent;
  transition: height var(--dur-med) var(--ease),
              background var(--dur-med) var(--ease),
              border-color var(--dur-med) var(--ease);
}
.site-header.is-scrolled {
  height: var(--header-h-compact);
  border-bottom-color: var(--color-border);
}
.site-header .container {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
}
.brand {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--font-size-xl);
  color: var(--color-text-primary);
  letter-spacing: -0.02em;
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
}
.brand .brand-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-accent);
  margin-left: 2px;
  transform: translateY(-2px);
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-5);
}
.nav-links {
  display: flex;
  gap: var(--space-5);
  list-style: none;
  margin: 0;
  padding: 0;
}
.nav-links a {
  color: var(--color-text-primary);
  font-weight: 500;
  font-size: var(--font-size-sm);
  position: relative;
}
.nav-links a::after {
  content: '';
  position: absolute;
  left: 0; bottom: -4px;
  width: 0;
  height: 1px;
  background: var(--color-accent);
  transition: width var(--dur-fast) var(--ease);
}
.nav-links a:hover::after,
.nav-links a[aria-current="page"]::after { width: 100%; }

.lang-toggle {
  display: inline-flex;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  padding: 2px;
  background: var(--color-bg-primary);
}
.lang-toggle button {
  background: transparent;
  border: 0;
  padding: 4px 12px;
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  cursor: pointer;
  border-radius: 999px;
  transition: background var(--dur-fast) var(--ease),
              color var(--dur-fast) var(--ease);
}
.lang-toggle button[aria-pressed="true"] {
  background: var(--color-accent);
  color: #fff;
}

.menu-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 6px 10px;
  cursor: pointer;
  font-size: var(--font-size-sm);
  color: var(--color-text-primary);
}

/* ===== Hero ===== */
.hero {
  padding: var(--space-9) 0 var(--space-8);
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 30%, rgba(184, 114, 43, 0.08), transparent 40%),
    radial-gradient(circle at 90% 70%, rgba(184, 114, 43, 0.06), transparent 50%);
  pointer-events: none;
}
.hero-inner {
  position: relative;
  text-align: left;
}
.hero-title {
  font-family: var(--font-display);
  font-size: clamp(48px, 10vw, var(--font-size-hero));
  font-weight: 800;
  line-height: 0.95;
  letter-spacing: -0.04em;
  margin: 0 0 var(--space-4);
  color: var(--color-text-primary);
}
.hero-title .accent {
  color: var(--color-accent);
}
.hero-sub {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  max-width: 720px;
  margin: 0 0 var(--space-6);
}
.hero-meta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
  padding: 6px 12px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  background: rgba(242, 231, 211, 0.6);
}
.hero-meta .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--color-active);
}
.scroll-cue {
  margin-top: var(--space-7);
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}
.scroll-cue::after {
  content: '↓';
  display: inline-block;
  animation: bounce 1.6s var(--ease) infinite;
}
@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(4px); }
}

/* ===== Section ===== */
.section {
  padding: var(--space-8) 0;
}
.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--space-5);
  margin-bottom: var(--space-6);
  flex-wrap: wrap;
}
.section-title {
  font-size: var(--font-size-2xl);
  margin: 0;
  position: relative;
}
.section-title::before {
  content: '';
  display: inline-block;
  width: 24px;
  height: 2px;
  background: var(--color-accent);
  vertical-align: middle;
  margin-right: var(--space-3);
  transform: translateY(-4px);
}
.section-desc {
  color: var(--color-text-secondary);
  margin: 0;
  max-width: 540px;
}
.section--alt {
  background: var(--color-bg-secondary);
}

/* ===== Cards ===== */
.card-grid {
  display: grid;
  gap: var(--space-5);
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  list-style: none;
  margin: 0;
  padding: 0;
}
.card-grid--featured {
  grid-template-columns: repeat(auto-fit, minmax(420px, 1fr));
  gap: var(--space-6);
}

.card {
  display: flex;
  flex-direction: column;
  background: var(--color-bg-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: transform var(--dur-med) var(--ease),
              box-shadow var(--dur-med) var(--ease),
              border-color var(--dur-med) var(--ease);
  position: relative;
}
.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-accent-soft);
}
.card a.card-link {
  color: inherit;
  display: flex;
  flex-direction: column;
  height: 100%;
}
.card a.card-link:hover { color: inherit; }

.card--featured {
  border-color: var(--color-featured-border);
  box-shadow: var(--shadow-featured);
}
.card--featured:hover {
  box-shadow: 0 0 0 1px var(--color-featured-border),
              0 10px 28px var(--color-featured-glow);
}
.featured-badge {
  position: absolute;
  top: var(--space-3);
  right: var(--space-3);
  background: var(--color-accent);
  color: #fff;
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  padding: 2px 8px;
  border-radius: 999px;
  letter-spacing: 0.04em;
  z-index: 2;
}

.card-thumb {
  position: relative;
  aspect-ratio: 16 / 9;
  background:
    linear-gradient(135deg, var(--color-bg-tertiary) 0%, var(--color-bg-secondary) 100%);
  overflow: hidden;
}
.card-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--dur-slow) var(--ease);
}
.card:hover .card-thumb img { transform: scale(1.03); }

.thumb-fallback {
  position: absolute; inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  color: var(--color-text-tertiary);
  font-size: var(--font-size-sm);
  background:
    repeating-linear-gradient(
      45deg,
      var(--color-bg-tertiary) 0 10px,
      var(--color-bg-secondary) 10px 20px
    );
}

.card-body {
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  flex: 1;
}
.card-title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  margin: 0;
  font-family: var(--font-display);
}
.card-summary {
  margin: 0;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}
.card-foot {
  margin-top: auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  justify-content: space-between;
}
.card-cta {
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  color: var(--color-accent);
}
.card-cta::after { content: ' →'; }

/* ===== Badges ===== */
.badges {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  padding: 2px 8px;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  background: var(--color-bg-primary);
  color: var(--color-text-secondary);
  letter-spacing: 0.02em;
}
.badge--status .status-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--color-archived);
  display: inline-block;
}
.badge--status[data-status="active"] .status-dot { background: var(--color-active); }
.badge--status[data-status="wip"] .status-dot { background: var(--color-wip); }
.badge--status[data-status="maintained"] .status-dot { background: var(--color-maintained); }
.badge--status[data-status="archived"] .status-dot { background: var(--color-archived); }
.badge--status[data-status="paused"] .status-dot { background: var(--color-paused); }

.badge--pricing[data-pricing="free"] { color: var(--color-active); border-color: var(--color-active); }
.badge--pricing[data-pricing="paid"] { color: var(--color-accent); border-color: var(--color-accent); }
.badge--pricing[data-pricing="freemium"] { color: var(--color-accent); border-color: var(--color-accent); }

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 10px 16px;
  border-radius: var(--radius-md);
  font-family: var(--font-sans);
  font-size: var(--font-size-sm);
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: background var(--dur-fast) var(--ease),
              color var(--dur-fast) var(--ease),
              border-color var(--dur-fast) var(--ease),
              transform var(--dur-fast) var(--ease);
}
.btn--primary {
  background: var(--color-accent);
  color: #fff;
}
.btn--primary:hover {
  background: var(--color-accent-hover);
  color: #fff;
  transform: translateY(-1px);
}
.btn--ghost {
  background: transparent;
  color: var(--color-text-primary);
  border-color: var(--color-border);
}
.btn--ghost:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* ===== Contact icons ===== */
.contact-list {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  list-style: none;
  margin: 0;
  padding: 0;
  justify-content: center;
}
.contact-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: 10px 16px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  font-size: var(--font-size-sm);
  background: var(--color-bg-primary);
  color: var(--color-text-primary);
  transition: border-color var(--dur-fast) var(--ease),
              color var(--dur-fast) var(--ease),
              transform var(--dur-fast) var(--ease);
}
.contact-link:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  transform: translateY(-1px);
}
.contact-link .icon { font-size: 18px; }

/* ===== Footer ===== */
.site-footer {
  margin-top: var(--space-8);
  border-top: 1px solid var(--color-border);
  background: var(--color-bg-secondary);
  padding: var(--space-7) 0 var(--space-6);
  position: relative;
}
.site-footer::before {
  content: '';
  position: absolute;
  top: -1px; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg,
    transparent,
    var(--color-accent-soft) 30%,
    var(--color-accent) 50%,
    var(--color-accent-soft) 70%,
    transparent);
  opacity: 0.6;
}
.footer-row {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: var(--space-5);
}
.footer-copy {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin: 0;
}
.footer-tag {
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
  text-align: right;
  margin: 0;
}
.footer-featured {
  margin-top: var(--space-5);
  padding-top: var(--space-5);
  border-top: 1px dashed var(--color-border);
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
}
.footer-featured-label {
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
  letter-spacing: 0.04em;
}
.footer-featured-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid var(--color-featured-border);
  background: var(--color-featured-glow);
  font-size: var(--font-size-sm);
  color: var(--color-text-primary);
}
.footer-featured-item:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
}

/* ===== Project detail page ===== */
.project-hero {
  padding: var(--space-8) 0 var(--space-6);
}
.project-hero .title-row {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-bottom: var(--space-3);
}
.project-title {
  font-size: clamp(32px, 5vw, var(--font-size-3xl));
  margin: 0;
  line-height: 1.05;
}
.project-oneliner {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  max-width: 920px;
  margin: 0 0 var(--space-5);
}
.project-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
  margin-top: var(--space-5);
}

.shot-gallery {
  display: grid;
  gap: var(--space-4);
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  margin: var(--space-6) 0;
}
.shot-gallery figure {
  margin: 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--color-border);
  background: var(--color-bg-secondary);
}
.shot-gallery img {
  width: 100%;
  height: auto;
  display: block;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}
.shot-gallery figcaption {
  padding: var(--space-3);
  font-size: var(--font-size-sm);
  color: var(--color-text-tertiary);
  background: var(--color-bg-primary);
  border-top: 1px solid var(--color-border);
}

.project-body {
  max-width: var(--reading-max);
  margin: 0 auto;
  padding: 0 var(--space-5);
}
.project-body h2 {
  margin-top: var(--space-7);
  font-size: var(--font-size-xl);
}
.project-body h2:first-child { margin-top: 0; }
.project-body p {
  font-size: var(--font-size-base);
  line-height: 1.85;
  color: var(--color-text-primary);
}

.tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  padding: 0;
  margin: 0;
  list-style: none;
}
.tech-tag {
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  padding: 4px 10px;
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-secondary);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: var(--space-4);
  margin-top: var(--space-4);
}
.related-card {
  padding: var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-bg-primary);
  display: block;
  color: var(--color-text-primary);
  transition: border-color var(--dur-fast) var(--ease),
              transform var(--dur-fast) var(--ease);
}
.related-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-2px);
  color: var(--color-text-primary);
}
.related-card .title {
  font-weight: 700;
  margin-bottom: 4px;
}
.related-card .one {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-top: var(--space-6);
}
.back-link:hover { color: var(--color-accent); }
.back-link::before { content: '←'; }

/* ===== Filter bar (works index) ===== */
.filter-bar {
  background: var(--color-bg-primary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-4);
  margin-bottom: var(--space-6);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-5);
}
.filter-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  min-width: 200px;
}
.filter-label {
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.filter-options {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}
.filter-options label {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: var(--font-size-sm);
  padding: 4px 10px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  cursor: pointer;
  background: var(--color-bg-primary);
  user-select: none;
  transition: background var(--dur-fast) var(--ease),
              color var(--dur-fast) var(--ease),
              border-color var(--dur-fast) var(--ease);
}
.filter-options input[type="checkbox"] {
  appearance: none;
  width: 12px; height: 12px;
  border: 1px solid var(--color-border);
  border-radius: 3px;
  background: var(--color-bg-primary);
  position: relative;
  cursor: pointer;
}
.filter-options input[type="checkbox"]:checked {
  background: var(--color-accent);
  border-color: var(--color-accent);
}
.filter-options input[type="checkbox"]:checked::after {
  content: '✓';
  color: #fff;
  font-size: 10px;
  position: absolute;
  top: -3px;
  left: 1px;
  font-weight: bold;
}
.filter-options label:has(input:checked) {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background: var(--color-accent-soft);
}

.results-meta {
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
  margin-bottom: var(--space-4);
}

/* ===== Placeholder (要・本人記入) ===== */
.placeholder-note {
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg-secondary);
  border-left: 3px solid var(--color-accent-soft);
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: var(--font-size-sm);
  color: var(--color-text-tertiary);
  font-style: italic;
}

/* ===== About page ===== */
.about-section {
  max-width: 760px;
  margin: 0 auto;
}
.about-section p {
  font-size: var(--font-size-base);
  line-height: 1.85;
}

/* ===== 404 ===== */
.error-wrap {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: var(--space-9) var(--space-5);
  min-height: 60vh;
}
.error-glyph {
  font-family: var(--font-mono);
  font-size: clamp(80px, 16vw, 160px);
  letter-spacing: -0.06em;
  color: var(--color-accent);
  line-height: 1;
  margin: 0 0 var(--space-5);
  opacity: 0.85;
}
.error-msg {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  max-width: 520px;
  margin: 0 auto var(--space-5);
}

/* ===== Language visibility ===== */
[data-lang="ja"], [data-lang="en"] { display: none; }
html[lang="ja"] [data-lang="ja"] { display: block; }
html[lang="en"] [data-lang="en"] { display: block; }
html[lang="ja"] [data-lang="ja"].inline,
html[lang="en"] [data-lang="en"].inline { display: inline; }

/* ===== Fade-in for IntersectionObserver ===== */
.fade-in {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity var(--dur-slow) var(--ease),
              transform var(--dur-slow) var(--ease);
  will-change: opacity, transform;
}
.fade-in.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .card-grid--featured { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
  .menu-toggle { display: inline-flex; }
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    right: var(--space-5);
    flex-direction: column;
    gap: var(--space-3);
    padding: var(--space-4);
    background: var(--color-bg-primary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
  }
  .nav-links.is-open { display: flex; }
  .footer-row {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .footer-tag { text-align: center; }
  .section { padding: var(--space-7) 0; }
  .hero { padding: var(--space-7) 0 var(--space-6); }
  .filter-bar { flex-direction: column; }
  .filter-group { min-width: 0; }
}

/* ===== Reduced motion ===== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  .fade-in {
    opacity: 1 !important;
    transform: none !important;
  }
}