/* ---------- tokens ---------- */
:root {
  --bg: #fbfbfd;
  --bg-alt: #f2f3f7;
  --surface: #ffffff;
  --surface-2: #f7f8fa;
  --border: #e2e5ec;
  --text: #16181d;
  --text-soft: #565b66;
  --text-mute: #8a909c;
  --accent: #2f6df6;
  --accent-soft: rgba(47, 109, 246, .1);
  --star: #f0a219;
  --shadow: 0 1px 2px rgba(18, 22, 33, .05), 0 8px 24px rgba(18, 22, 33, .06);
  --shadow-lift: 0 2px 4px rgba(18, 22, 33, .06), 0 16px 40px rgba(18, 22, 33, .12);
  --radius: 14px;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0c0d11;
    --bg-alt: #101218;
    --surface: #15171e;
    --surface-2: #1b1e26;
    --border: #262a35;
    --text: #edeff4;
    --text-soft: #a5abb9;
    --text-mute: #767d8d;
    --accent: #7aa5ff;
    --accent-soft: rgba(122, 165, 255, .13);
    --star: #f2b544;
    --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 8px 24px rgba(0, 0, 0, .3);
    --shadow-lift: 0 2px 4px rgba(0, 0, 0, .45), 0 16px 40px rgba(0, 0, 0, .45);
  }
}
:root[data-theme="dark"] {
  --bg: #0c0d11;
  --bg-alt: #101218;
  --surface: #15171e;
  --surface-2: #1b1e26;
  --border: #262a35;
  --text: #edeff4;
  --text-soft: #a5abb9;
  --text-mute: #767d8d;
  --accent: #7aa5ff;
  --accent-soft: rgba(122, 165, 255, .13);
  --star: #f2b544;
  --shadow: 0 1px 2px rgba(0, 0, 0, .4), 0 8px 24px rgba(0, 0, 0, .3);
  --shadow-lift: 0 2px 4px rgba(0, 0, 0, .45), 0 16px 40px rgba(0, 0, 0, .45);
}

/* ---------- base ---------- */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Noto Sans JP", "Segoe UI", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
a { color: inherit; }
img { max-width: 100%; display: block; }
h1, h2, h3 { line-height: 1.35; letter-spacing: -.01em; margin: 0; }
p { margin: 0 0 1em; }
ul { margin: 0; padding: 0; list-style: none; }

/* .app-card の display:flex などが UA スタイルの [hidden]{display:none} を
   上書きしてしまうため、明示的に打ち消す */
[hidden] { display: none !important; }

.wrap { width: min(1080px, 100% - 2.5rem); margin-inline: auto; }

.skip {
  position: absolute; left: -9999px; top: 0; z-index: 100;
  background: var(--accent); color: #fff; padding: .6rem 1rem; border-radius: 0 0 8px 0;
}
.skip:focus { left: 0; }

/* ---------- header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; gap: 1.25rem; height: 60px; }
.brand { font-weight: 700; letter-spacing: -.02em; text-decoration: none; font-size: 1.05rem; }
.brand .dot { color: var(--accent); }
.nav { margin-left: auto; display: flex; gap: 1.4rem; font-size: .9rem; }
.nav a { color: var(--text-soft); text-decoration: none; transition: color .15s; }
.nav a:hover { color: var(--text); }
.theme-toggle {
  border: 1px solid var(--border); background: var(--surface); color: var(--text-soft);
  width: 34px; height: 34px; border-radius: 999px; cursor: pointer; font-size: .95rem;
  display: grid; place-items: center; transition: color .15s, border-color .15s;
}
.theme-toggle:hover { color: var(--text); border-color: var(--text-mute); }
@media (max-width: 640px) { .nav { display: none; } }

/* ---------- hero ---------- */
.hero {
  padding: clamp(3.5rem, 9vw, 6.5rem) 0 clamp(2.5rem, 6vw, 4rem);
  background:
    radial-gradient(70ch 40ch at 12% -10%, var(--accent-soft), transparent 65%),
    var(--bg);
}
.eyebrow {
  font-size: .85rem; letter-spacing: .06em;
  color: var(--accent); font-weight: 600; margin-bottom: .6rem;
}
.hero-title { font-size: clamp(2.1rem, 6vw, 3.4rem); letter-spacing: -.03em; margin-bottom: .8rem; }
.hero-lead { max-width: 62ch; color: var(--text-soft); font-size: clamp(1rem, 2vw, 1.08rem); }
.hero-actions { display: flex; flex-wrap: wrap; gap: .7rem; margin: 1.6rem 0 0; }

.btn {
  display: inline-flex; align-items: center; gap: .4rem;
  padding: .58rem 1.15rem; border-radius: 999px; text-decoration: none;
  border: 1px solid var(--border); background: var(--surface);
  font-size: .9rem; font-weight: 600; color: var(--text);
  transition: transform .15s, box-shadow .15s, border-color .15s;
}
.btn:hover { transform: translateY(-1px); box-shadow: var(--shadow); border-color: var(--text-mute); }
.btn-primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn-primary:hover { border-color: var(--accent); }

.stats {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1px; margin: 2.75rem 0 0; padding: 0;
  background: var(--border); border: 1px solid var(--border);
  border-radius: var(--radius); overflow: hidden;
}
.stat { background: var(--bg); padding: 1.1rem 1.25rem; }
.stat dt { font-size: .78rem; color: var(--text-mute); letter-spacing: .04em; }
.stat dd { margin: .15rem 0 0; font-size: 1.65rem; font-weight: 700; letter-spacing: -.02em; font-variant-numeric: tabular-nums; }
.stat dd small { font-size: .82rem; font-weight: 500; color: var(--text-mute); margin-left: .15rem; }

/* ---------- sections ---------- */
.section { padding: clamp(3rem, 7vw, 5rem) 0; }
.section-alt { background: var(--bg-alt); border-block: 1px solid var(--border); }
.section-head { margin-bottom: 1.9rem; }
.section-head h2 { font-size: clamp(1.4rem, 3.4vw, 1.85rem); letter-spacing: -.02em; }
.section-note { color: var(--text-soft); max-width: 62ch; margin: .5rem 0 0; font-size: .95rem; }

/* ---------- filters ---------- */
.toolbar {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
  gap: .8rem 1.25rem; margin-bottom: 1.5rem;
}
.filters { display: flex; flex-wrap: wrap; gap: .5rem; }
.sort { display: flex; align-items: center; gap: .5rem; margin-left: auto; }
.sort label { font-size: .82rem; color: var(--text-mute); white-space: nowrap; }
.sort select {
  appearance: none;
  border: 1px solid var(--border); background: var(--surface); color: var(--text);
  font: inherit; font-size: .85rem; font-weight: 600;
  padding: .38rem 2rem .38rem .9rem; border-radius: 999px; cursor: pointer;
  background-image: linear-gradient(45deg, transparent 50%, currentColor 50%),
                    linear-gradient(135deg, currentColor 50%, transparent 50%);
  background-position: right 1.05rem center, right .8rem center;
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
  transition: border-color .15s;
}
.sort select:hover { border-color: var(--text-mute); }
.sort select:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.filter {
  border: 1px solid var(--border); background: var(--surface); color: var(--text-soft);
  padding: .38rem .95rem; border-radius: 999px; font-size: .85rem; font-weight: 600;
  cursor: pointer; transition: all .15s;
}
.filter:hover { color: var(--text); border-color: var(--text-mute); }
.filter[aria-pressed="true"] { background: var(--accent); border-color: var(--accent); color: #fff; }
.filter .count { opacity: .65; margin-left: .3rem; font-variant-numeric: tabular-nums; }

/* ---------- app cards ---------- */
.app-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(310px, 100%), 1fr)); gap: 1.1rem; }
.app-card {
  display: flex; flex-direction: column; gap: .9rem;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.25rem; box-shadow: var(--shadow);
  transition: transform .18s ease, box-shadow .18s ease;
}
.app-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lift); }
.app-top { display: flex; gap: .9rem; align-items: flex-start; }
.app-icon {
  width: 60px; height: 60px; border-radius: 14px; flex: none;
  border: 1px solid var(--border); background: var(--surface-2);
}
.app-head { min-width: 0; }
.app-name { font-size: 1.02rem; font-weight: 700; letter-spacing: -.01em; margin: 0; }
.app-meta { display: flex; flex-wrap: wrap; align-items: center; gap: .45rem; margin-top: .3rem; font-size: .78rem; color: var(--text-mute); }
.badge {
  border: 1px solid var(--border); border-radius: 999px; padding: .05rem .5rem;
  background: var(--surface-2); font-weight: 600; letter-spacing: .01em;
}
.rating { color: var(--text-soft); font-variant-numeric: tabular-nums; white-space: nowrap; }
.rating .star { color: var(--star); }
.app-desc { color: var(--text-soft); font-size: .9rem; margin: 0; flex: 1; }
.tags { display: flex; flex-wrap: wrap; gap: .35rem; }
.tag {
  font-size: .73rem; color: var(--text-soft); background: var(--surface-2);
  border: 1px solid var(--border); border-radius: 6px; padding: .1rem .45rem;
}
.app-links { display: flex; flex-wrap: wrap; gap: .5rem; padding-top: .15rem; }
.app-links a {
  font-size: .82rem; font-weight: 600; text-decoration: none; color: var(--accent);
  border: 1px solid var(--border); border-radius: 8px; padding: .3rem .7rem;
  transition: background .15s, border-color .15s;
}
.app-links a:hover { background: var(--accent-soft); border-color: var(--accent); }
.app-links a.is-lp { background: var(--accent); border-color: var(--accent); color: #fff; }
.app-links a.is-lp:hover { background: var(--accent); filter: brightness(1.08); }

/* ---------- other works ---------- */
.work-list { display: grid; grid-template-columns: repeat(auto-fill, minmax(min(320px, 100%), 1fr)); gap: 1rem; }
.work-item {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.1rem 1.2rem;
}
.work-head { display: flex; align-items: baseline; gap: .6rem; flex-wrap: wrap; }
.work-period { font-size: .76rem; color: var(--text-mute); font-variant-numeric: tabular-nums; }
.work-name { font-size: .97rem; font-weight: 700; margin: 0; }
.work-item p { color: var(--text-soft); font-size: .88rem; margin: .45rem 0 .7rem; }
.work-repo { display: inline-block; margin-top: .8rem; font-size: .8rem; font-weight: 600; color: var(--accent); text-decoration: none; }
.work-repo:hover { text-decoration: underline; }
.work-private { margin: .8rem 0 0; font-size: .75rem; color: var(--text-mute); }

/* ---------- about ---------- */
.about-grid { display: grid; grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr); gap: clamp(1.5rem, 5vw, 3.5rem); align-items: start; }
.about-grid h2 { font-size: clamp(1.4rem, 3.4vw, 1.85rem); margin-bottom: .9rem; }
.about-grid p { color: var(--text-soft); }
.about-side h3 { font-size: .82rem; letter-spacing: .06em; color: var(--text-mute); margin: 0 0 .7rem; }
.about-side h3 + * { margin-bottom: 1.8rem; }
.chips { display: flex; flex-wrap: wrap; gap: .4rem; }
.chips li {
  font-size: .8rem; border: 1px solid var(--border); background: var(--surface);
  border-radius: 999px; padding: .2rem .7rem; color: var(--text-soft);
}
.link-list li { margin-bottom: .35rem; }
.link-list a { color: var(--accent); text-decoration: none; font-size: .9rem; font-weight: 600; }
.link-list a:hover { text-decoration: underline; }
@media (max-width: 760px) { .about-grid { grid-template-columns: 1fr; } }

/* ---------- footer ---------- */
.site-footer { border-top: 1px solid var(--border); padding: 2rem 0; background: var(--bg-alt); }
.footer-inner { display: flex; justify-content: space-between; flex-wrap: wrap; gap: .5rem; font-size: .82rem; color: var(--text-mute); }
.footer-inner p { margin: 0; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; animation: none !important; }
}