/* =====================================================================
 * wakame-web — style.css
 * 白基調 / アクセント: ブルー & グリーン
 * ------------------------------------------------------------------
 *  1. Tokens
 *  2. Base
 *  3. Layout & Utility
 *  4. Header / Nav
 *  5. Hero
 *  6. Section head / Toolbar / Filters
 *  7. Work cards
 *  8. About
 *  9. Contact / Footer
 * 10. Motion
 * =================================================================== */

/* ---------------------------------------------------------------
 * 1. Tokens
 * ------------------------------------------------------------- */
:root {
  /* accent — 主役は緑、青はサポート */
  --blue-50:  #eff6ff;
  --blue-100: #dbeafe;
  --blue-400: #60a5fa;
  --blue-500: #3b82f6;
  --blue-600: #2563eb;
  --blue-700: #1d4ed8;

  --green-50:  #ecfdf5;
  --green-100: #d1fae5;
  --green-300: #6ee7b7;
  --green-400: #34d399;
  --green-500: #10b981;
  --green-600: #059669;
  --green-700: #047857;
  --green-800: #065f46;

  /* 意味づけ：この4つを差し替えれば全体の配色バランスが変わります */
  --accent:       var(--green-600);
  --accent-hover: var(--green-700);
  --accent-soft:  var(--green-50);
  --accent-2:     var(--blue-600);
  --accent-2-soft:var(--blue-50);

  /* surface */
  --bg:          #ffffff;
  --bg-alt:      #f6f9fc;
  --surface:     #ffffff;
  --surface-2:   #f2f6fb;
  --border:      #e4ebf3;
  --border-soft: #eef3f9;

  /* text */
  --text:    #0d1526;
  --text-2:  #43506b;
  --muted:   #7a879f;

  /* effects */
  --shadow-sm: 0 1px 2px rgba(13, 21, 38, .05);
  --shadow:    0 6px 20px -8px rgba(13, 21, 38, .14), 0 2px 6px -2px rgba(13, 21, 38, .06);
  --shadow-lg: 0 24px 50px -22px rgba(13, 21, 38, .28), 0 6px 16px -8px rgba(13, 21, 38, .10);
  --ring:      0 0 0 3px rgba(5, 150, 105, .28);
  --glow:      0 10px 24px -12px rgba(5, 150, 105, .85);
  --glow-lg:   0 16px 32px -14px rgba(5, 150, 105, .95);

  --radius:    16px;
  --radius-lg: 24px;
  --radius-pill: 999px;

  /* 青は入口だけ、大半を緑が占める */
  --gradient: linear-gradient(115deg, var(--blue-600) 0%, var(--green-600) 38%, var(--green-400) 100%);

  --header-h: 68px;
  --maxw: 1160px;

  --ease: cubic-bezier(.22, .8, .28, 1);

  color-scheme: light;
}

/* dark: システム設定（ユーザーが明示指定していない場合のみ） */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg:          #0a0f1a;
    --bg-alt:      #0d1424;
    --surface:     #111a2b;
    --surface-2:   #162034;
    --border:      #1f2c44;
    --border-soft: #1a2538;

    --text:   #eef3fb;
    --text-2: #b9c6dd;
    --muted:  #8294b2;

    --blue-50:  #14213a;
    --blue-100: #1b2d4d;
    --green-50: #0d2b22;
    --green-100:#10392d;

    /* 暗い背景では明るい側の緑・青を使う */
    --accent:       var(--green-400);
    --accent-hover: var(--green-300);
    --accent-2:     var(--blue-400);

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, .4);
    --shadow:    0 8px 24px -10px rgba(0, 0, 0, .6);
    --shadow-lg: 0 28px 60px -26px rgba(0, 0, 0, .75);

    color-scheme: dark;
  }
}

/* dark: 明示指定 */
:root[data-theme="dark"] {
  --bg:          #0a0f1a;
  --bg-alt:      #0d1424;
  --surface:     #111a2b;
  --surface-2:   #162034;
  --border:      #1f2c44;
  --border-soft: #1a2538;

  --text:   #eef3fb;
  --text-2: #b9c6dd;
  --muted:  #8294b2;

  --blue-50:  #14213a;
  --blue-100: #1b2d4d;
  --green-50: #0d2b22;
  --green-100:#10392d;

  /* 暗い背景では明るい側の緑・青を使う */
  --accent:       var(--green-400);
  --accent-hover: var(--green-300);
  --accent-2:     var(--blue-400);

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, .4);
  --shadow:    0 8px 24px -10px rgba(0, 0, 0, .6);
  --shadow-lg: 0 28px 60px -26px rgba(0, 0, 0, .75);

  color-scheme: dark;
}

/* ---------------------------------------------------------------
 * 2. Base
 * ------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', 'Noto Sans JP', -apple-system, BlinkMacSystemFont,
               'Segoe UI', 'Hiragino Kaku Gothic ProN', 'Yu Gothic', Meiryo, sans-serif;
  font-size: 16px;
  line-height: 1.8;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; }
[hidden] { display: none !important; }

a { color: inherit; text-decoration: none; }

h1, h2, h3 {
  line-height: 1.25;
  letter-spacing: -.02em;
  margin: 0;
  font-weight: 700;
}

p { margin: 0 0 1em; }
ul { margin: 0; padding: 0; list-style: none; }

button { font: inherit; color: inherit; }

:focus-visible {
  outline: none;
  box-shadow: var(--ring);
  border-radius: 8px;
}

::selection { background: var(--green-100); color: var(--text); }

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 100;
  background: var(--accent);
  color: #fff;
  padding: 10px 18px;
  border-radius: 0 0 10px 0;
}
.skip-link:focus { left: 0; }

/* ---------------------------------------------------------------
 * 3. Layout & Utility
 * ------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: 24px;
}

.section { padding-block: clamp(72px, 10vw, 128px); }

.section--alt {
  background: var(--bg-alt);
  border-block: 1px solid var(--border-soft);
}

.eyebrow {
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .18em;
  color: var(--accent);
  margin: 0 0 12px;
}

.grad {
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* --- buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 26px;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  font-size: .95rem;
  font-weight: 600;
  line-height: 1;
  cursor: pointer;
  white-space: nowrap;
  transition: transform .25s var(--ease), box-shadow .25s var(--ease),
              background-color .2s var(--ease), border-color .2s var(--ease);
}
.btn--sm { padding: 9px 18px; font-size: .85rem; }

.btn--primary {
  background: var(--gradient);
  color: #fff;
  box-shadow: var(--glow);
}
.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--glow-lg);
}

.btn--ghost {
  background: var(--surface);
  border-color: var(--border);
  color: var(--text);
  box-shadow: var(--shadow-sm);
}
.btn--ghost:hover {
  border-color: var(--green-400);
  color: var(--accent);
  transform: translateY(-2px);
}

.btn:active { transform: translateY(0); }

/* --- chips / tags --- */
.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.chips li {
  padding: 6px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  background: var(--surface);
  font-size: .8rem;
  font-weight: 500;
  color: var(--text-2);
}

/* ---------------------------------------------------------------
 * 4. Header / Nav
 * ------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .25s var(--ease), box-shadow .25s var(--ease);
}
.site-header.is-scrolled {
  border-bottom-color: var(--border);
  box-shadow: var(--shadow-sm);
}

.header__inner {
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  letter-spacing: -.03em;
  font-size: 1.08rem;
}
/* 海藻モチーフのマーク（#logo-mark を <use> で参照） */
.svg-sprite {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
}

.logo__mark {
  width: 27px;
  height: 27px;
  flex: none;
  overflow: visible;
  transition: transform .4s var(--ease);
  transform-origin: 50% 90%;
}
.logo:hover .logo__mark { transform: rotate(-5deg) scale(1.06); }

.logo__dot { color: var(--accent-2); }

.nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}
.nav a {
  position: relative;
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  font-size: .92rem;
  font-weight: 500;
  color: var(--text-2);
  transition: color .2s var(--ease), background-color .2s var(--ease);
}
.nav a:hover { color: var(--accent); background: var(--accent-soft); }

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

.icon-btn {
  display: inline-grid;
  place-items: center;
  width: 40px;
  height: 40px;
  padding: 0;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface);
  cursor: pointer;
  transition: border-color .2s var(--ease), color .2s var(--ease), transform .2s var(--ease);
}
.icon-btn:hover { border-color: var(--green-400); color: var(--accent); transform: translateY(-1px); }

.icon-btn svg {
  width: 19px;
  height: 19px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.icon-moon { display: none; }
:root[data-theme="dark"] .icon-sun { display: none; }
:root[data-theme="dark"] .icon-moon { display: block; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .icon-sun { display: none; }
  :root:not([data-theme="light"]) .icon-moon { display: block; }
}

/* hamburger */
.nav-toggle { display: none; flex-direction: column; gap: 4px; }
.nav-toggle .bar {
  width: 17px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
  transition: transform .25s var(--ease), opacity .2s var(--ease);
}
.nav-toggle.is-open .bar:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle.is-open .bar:nth-child(2) { opacity: 0; }
.nav-toggle.is-open .bar:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

@media (max-width: 720px) {
  .nav-toggle { display: inline-flex; }
  .nav {
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    padding: 12px 20px 20px;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity .22s var(--ease), transform .22s var(--ease), visibility .22s;
  }
  .nav.is-open { opacity: 1; visibility: visible; transform: translateY(0); }
  .nav a { padding: 12px 14px; font-size: 1rem; }
}

/* ---------------------------------------------------------------
 * 5. Hero
 * ------------------------------------------------------------- */
.hero {
  position: relative;
  padding-block: clamp(80px, 12vw, 148px) clamp(72px, 10vw, 120px);
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}

.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: .5;
}
/* 緑を主役に大きく、青は支え役として小さく */
.blob--green {
  width: 46vw;
  min-width: 340px;
  aspect-ratio: 1;
  top: -16%;
  right: -10%;
  background: radial-gradient(circle at 40% 35%, var(--green-400), transparent 70%);
  opacity: .55;
}
.blob--blue {
  width: 30vw;
  min-width: 240px;
  aspect-ratio: 1;
  bottom: -20%;
  left: -6%;
  background: radial-gradient(circle at 60% 40%, var(--blue-400), transparent 68%);
  opacity: .3;
}

.grid-lines {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--border-soft) 1px, transparent 1px),
    linear-gradient(to bottom, var(--border-soft) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, #000 20%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, #000 20%, transparent 78%);
  opacity: .8;
}

.hero__inner { position: relative; z-index: 1; max-width: 780px; }

.hero__title {
  font-size: clamp(2.4rem, 6.4vw, 4.2rem);
  font-weight: 800;
  letter-spacing: -.035em;
  margin-bottom: 24px;
}

.hero__lead {
  font-size: clamp(1rem, 1.6vw, 1.12rem);
  color: var(--text-2);
  max-width: 54ch;
  margin-bottom: 36px;
}

.hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 56px;
}

.stats {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 0;
  padding: 0;
}
.stat {
  flex: 1 1 140px;
  padding: 18px 22px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}
.stat dt {
  font-size: .68rem;
  font-weight: 700;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--muted);
}
.stat dd {
  margin: 2px 0 0;
  font-size: 1.7rem;
  font-weight: 800;
  letter-spacing: -.03em;
  line-height: 1.2;
  background: var(--gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---------------------------------------------------------------
 * 6. Section head / Toolbar / Filters
 * ------------------------------------------------------------- */
.section__head { max-width: 620px; margin-bottom: 40px; }

.section__title {
  font-size: clamp(1.7rem, 3.4vw, 2.4rem);
  margin-bottom: 14px;
}

.section__lead { color: var(--text-2); margin: 0; }

.toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 14px;
}

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

.filter {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 18px;
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  background: var(--surface);
  font-size: .82rem;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--text-2);
  cursor: pointer;
  transition: color .2s var(--ease), border-color .2s var(--ease),
              background-color .2s var(--ease), transform .2s var(--ease);
}
.filter:hover { border-color: var(--green-400); color: var(--accent); transform: translateY(-1px); }

.filter.is-active {
  background: var(--gradient);
  border-color: transparent;
  color: #fff;
  box-shadow: var(--glow);
}

.filter__count {
  font-size: .7rem;
  font-weight: 600;
  padding: 1px 7px;
  border-radius: var(--radius-pill);
  background: var(--surface-2);
  color: var(--muted);
}
.filter.is-active .filter__count {
  background: rgba(255, 255, 255, .24);
  color: #fff;
}

.search {
  position: relative;
  display: flex;
  align-items: center;
  flex: 0 1 280px;
}
.search svg {
  position: absolute;
  left: 14px;
  width: 17px;
  height: 17px;
  fill: none;
  stroke: var(--muted);
  stroke-width: 1.8;
  stroke-linecap: round;
  pointer-events: none;
}
.search input {
  width: 100%;
  padding: 11px 16px 11px 40px;
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  background: var(--surface);
  color: var(--text);
  font-size: .9rem;
  transition: border-color .2s var(--ease), box-shadow .2s var(--ease);
}
.search input::placeholder { color: var(--muted); }
.search input:focus {
  outline: none;
  border-color: var(--green-400);
  box-shadow: var(--ring);
}

.result-count {
  font-size: .82rem;
  color: var(--muted);
  margin: 0 0 24px;
}

.empty {
  text-align: center;
  color: var(--muted);
  padding: 56px 20px;
}
.empty .btn { margin-top: 14px; }

/* ---------------------------------------------------------------
 * 7. Work cards
 * ------------------------------------------------------------- */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(290px, 1fr));
  gap: 24px;
}

.card {
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform .35s var(--ease), box-shadow .35s var(--ease),
              border-color .35s var(--ease), opacity .5s var(--ease);
}
.card:hover {
  transform: translateY(-6px);
  border-color: transparent;
  box-shadow: var(--shadow-lg);
}

.card--featured { grid-column: span 2; }
@media (max-width: 700px) { .card--featured { grid-column: span 1; } }

.card__media {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--surface-2);
}
.card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .5s var(--ease);
}
.card:hover .card__media img { transform: scale(1.05); }

/* 画像が無いときのプレースホルダー */
.card__ph {
  display: grid;
  place-items: center;
  width: 100%;
  height: 100%;
  font-size: clamp(2.6rem, 7vw, 3.6rem);
  font-weight: 800;
  letter-spacing: -.04em;
  color: #fff;
  background: var(--gradient);
  position: relative;
}
.card__ph::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 20%, rgba(255,255,255,.35), transparent 42%),
    radial-gradient(circle at 82% 78%, rgba(255,255,255,.22), transparent 46%);
}
.card__ph[data-cat="GAME"] { background: linear-gradient(128deg, var(--green-700), var(--green-300)); }
.card__ph[data-cat="APP"]  { background: linear-gradient(128deg, var(--green-800), #22d3ee); }
.card__ph[data-cat="TOOL"] { background: linear-gradient(128deg, var(--green-600), var(--blue-500)); }

.badge {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 1;
  padding: 5px 12px;
  border-radius: var(--radius-pill);
  font-size: .66rem;
  font-weight: 800;
  letter-spacing: .12em;
  background: rgba(255, 255, 255, .92);
  color: var(--green-700);
  backdrop-filter: blur(6px);
  box-shadow: var(--shadow-sm);
}
.badge--SITE { color: var(--blue-700); }
.badge--GAME { color: var(--green-600); }
.badge--APP  { color: var(--green-800); }
.badge--TOOL { color: var(--blue-600); }

.card__body { padding: 20px 22px 8px; flex: 1; }

.card__title {
  font-size: 1.12rem;
  font-weight: 700;
  margin-bottom: 8px;
}
.card__title a { transition: color .2s var(--ease); }
.card:hover .card__title a { color: var(--accent); }

.card__desc {
  font-size: .88rem;
  line-height: 1.75;
  color: var(--text-2);
  margin-bottom: 14px;
}

.tags { display: flex; flex-wrap: wrap; gap: 6px; }
.tags li {
  padding: 3px 10px;
  border-radius: var(--radius-pill);
  background: var(--accent-soft);
  color: var(--accent);
  font-size: .72rem;
  font-weight: 600;
}
/* SITE だけ青にして、一覧の中で緑と青が程よく混ざるようにする */
.card[data-category="SITE"] .tags li { background: var(--accent-2-soft); color: var(--accent-2); }

.card__foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 22px 18px;
  margin-top: auto;
}

.card__year {
  font-size: .76rem;
  font-weight: 600;
  letter-spacing: .06em;
  color: var(--muted);
}

.card__links { display: inline-flex; gap: 14px; }

.card__link {
  font-size: .8rem;
  font-weight: 700;
  color: var(--accent);
  transition: opacity .2s var(--ease);
}
.card__link--sub { color: var(--muted); }
.card__link:hover { opacity: .7; }

/* ---------------------------------------------------------------
 * 8. About
 * ------------------------------------------------------------- */
.about {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: clamp(32px, 5vw, 64px);
  align-items: start;
}
@media (max-width: 860px) { .about { grid-template-columns: 1fr; } }

.about__text p { color: var(--text-2); }

.about__subtitle {
  font-size: .95rem;
  margin: 28px 0 14px;
}

.about__card {
  padding: 32px 28px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  text-align: center;
}

.about__avatar {
  width: 86px;
  height: 86px;
  margin: 0 auto 16px;
  display: grid;
  place-items: center;
  border-radius: 26px;
  background: var(--accent-soft);
  border: 1px solid var(--green-100);
  box-shadow: 0 14px 30px -16px rgba(5, 150, 105, .6);
}
.about__avatar svg { width: 52px; height: 52px; }

.about__name {
  font-size: 1.2rem;
  font-weight: 800;
  letter-spacing: -.02em;
  margin: 0;
}
.about__role {
  font-size: .82rem;
  color: var(--muted);
  margin: 2px 0 22px;
}

.about__meta {
  display: grid;
  gap: 10px;
  text-align: left;
  border-top: 1px solid var(--border-soft);
  padding-top: 18px;
}
.about__meta li {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  font-size: .84rem;
}
.about__meta span { color: var(--muted); }
.about__meta b { font-weight: 600; }

/* ---------------------------------------------------------------
 * 9. Contact / Footer
 * ------------------------------------------------------------- */
.cta {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  padding: clamp(36px, 5vw, 56px);
  border-radius: var(--radius-lg);
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.cta::before {
  content: '';
  position: absolute;
  inset: 0 auto 0 0;
  width: 5px;
  background: var(--gradient);
}
.cta__text { flex: 1 1 340px; }
.cta__text p:last-child { margin: 0; color: var(--text-2); }
.cta__links { display: flex; flex-wrap: wrap; gap: 12px; }

.site-footer {
  border-top: 1px solid var(--border);
  background: var(--bg-alt);
}
.footer__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-block: 32px;
}
.footer__copy {
  margin: 0;
  font-size: .8rem;
  color: var(--muted);
}
.to-top {
  font-size: .8rem;
  font-weight: 600;
  color: var(--text-2);
  transition: color .2s var(--ease);
}
.to-top:hover { color: var(--accent); }

/* ---------------------------------------------------------------
 * 10. Motion
 * ------------------------------------------------------------- */
.reveal, .card {
  opacity: 0;
  transform: translateY(18px);
}
.reveal.is-visible, .card.is-visible {
  opacity: 1;
  transform: none;
  transition: opacity .6s var(--ease) var(--delay, 0ms),
              transform .6s var(--ease) var(--delay, 0ms);
}
/* hover の transform は is-visible 後にも効かせる */
.card.is-visible:hover { transform: translateY(-6px); }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    transition-duration: .001ms !important;
  }
  .reveal, .card { opacity: 1; transform: none; }
}