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

:root {
  --bg:       #0a0a0c;
  --surface:  #111115;
  --border:   rgba(255, 255, 255, 0.07);
  --border-h: rgba(255, 255, 255, 0.15);
  --text:     #f0efe9;
  --text-2:   #88878e;
  --text-3:   #3a3a40;

  --font: system-ui, -apple-system, "Helvetica Neue", sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, monospace;

  --max-w: 1080px;
  --pad: clamp(20px, 5vw, 60px);
  --radius: 18px;
}

@media (prefers-color-scheme: light) {
  :root {
    --bg:       #f5f4f0;
    --surface:  #ffffff;
    --border:   rgba(0, 0, 0, 0.08);
    --border-h: rgba(0, 0, 0, 0.18);
    --text:     #111113;
    --text-2:   #66656b;
    --text-3:   #b0aeb6;
  }
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  overflow-x: hidden;
}

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

/* ── Header ────────────────────────────── */

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px var(--pad);
  border-bottom: 1px solid var(--border);
}

.identity {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--text-3);
  transition: color 0.2s;
}
.identity:hover { color: var(--text-2); }

.lang-switch {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 100;
  display: flex;
  gap: 4px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 4px;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
}
.lang-switch a {
  padding: 6px 12px;
  border-radius: 7px;
  font-family: var(--mono);
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-2);
  transition: background 0.2s, color 0.2s;
}
.lang-switch a.active { background: var(--text); color: var(--bg); }
.lang-switch a:hover:not(.active) { background: var(--border); color: var(--text); }

/* ── Main ───────────────────────────────── */

main {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--pad);
}

/* ── Intro ──────────────────────────────── */

.intro {
  padding: 20px 0 clamp(24px, 4vh, 40px);
}

.intro h1 {
  display: flex;
  align-items: baseline;
  gap: 0.3em;
  font-size: clamp(3.2rem, 9vw, 7.2rem);
  font-weight: 700;
  letter-spacing: -0.05em;
  line-height: 0.92;
  color: var(--text);
}
.by {
  font-size: clamp(0.9rem, 2vw, 1.15rem);
  font-weight: 400;
  letter-spacing: -0.01em;
  color: var(--text-2);
}
.by a { color: inherit; text-decoration: underline; text-underline-offset: 3px; }
.by a:hover { color: var(--text); }

/* ── Grid ───────────────────────────────── */

.grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  padding-bottom: clamp(80px, 14vh, 130px);
}

@media (max-width: 600px) {
  .grid { grid-template-columns: 1fr; }
}

/* ── App card ───────────────────────────── */

.app-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 28px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  cursor: pointer;
  transition:
    border-color 0.3s,
    transform 0.3s cubic-bezier(.2, .8, .2, 1),
    box-shadow 0.3s;
}

.app-card:hover {
  border-color: var(--border-h);
  transform: translateY(-4px);
  box-shadow: 0 20px 60px -20px rgba(0, 0, 0, 0.45);
}

@media (prefers-color-scheme: light) {
  .app-card:hover {
    box-shadow: 0 8px 32px -8px rgba(0, 0, 0, 0.12);
  }
}

/* The glow: each app's color bleeds from the top-right corner */
.app-card::before {
  content: "";
  position: absolute;
  top: -40px;
  right: -40px;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: var(--glow);
  opacity: 0.13;
  filter: blur(48px);
  pointer-events: none;
  transition: opacity 0.4s;
}
.app-card:hover::before {
  opacity: 0.26;
}

@media (prefers-color-scheme: light) {
  .app-card::before { opacity: 0.08; }
  .app-card:hover::before { opacity: 0.15; }
}

/* ── Card contents ──────────────────────── */

.card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.card-icon {
  width: 52px;
  height: 52px;
  border-radius: 13px;
  display: block;
  flex-shrink: 0;
}

.card-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.tag {
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.03em;
  padding: 4px 9px;
  border-radius: 999px;
  border: 1px solid var(--border);
  color: var(--text-2);
  white-space: nowrap;
}

.card-name {
  font-size: clamp(1.6rem, 3vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1;
  color: var(--text);
}

.card-desc {
  font-size: 0.92rem;
  color: var(--text-2);
  line-height: 1.65;
  flex: 1;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-family: var(--mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-3);
  margin-top: 6px;
  transition: color 0.2s;
}
.app-card:hover .card-link { color: var(--text-2); }

.arrow {
  display: inline-block;
  transition: transform 0.3s cubic-bezier(.2, .8, .2, 1);
}
.app-card:hover .arrow { transform: translateX(5px); }

/* ── Footer ─────────────────────────────── */

footer {
  border-top: 1px solid var(--border);
  padding: 28px var(--pad);
  font-family: var(--mono);
  font-size: 0.66rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-3);
}

/* ── Animations ─────────────────────────── */

@media (prefers-reduced-motion: reduce) {
  .app-card,
  .app-card::before,
  .card-link,
  .arrow {
    transition: none;
  }
  .app-card:hover {
    transform: none;
  }
}