:root {
  --bg: #ffffff;
  --fg: #0a0a0a;
  --muted: #6b6b6b;
  --line: #e8e8e8;
  --card: #ffffff;
  --hover: #f5f5f5;
  --accent: #0a0a0a;
  --on-accent: #ffffff;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0a0a0a; --fg: #f5f5f5; --muted: #8f8f8f; --line: #222222;
    --card: #0f0f0f; --hover: #161616; --accent: #ffffff; --on-accent: #0a0a0a;
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg: #0a0a0a; --fg: #f5f5f5; --muted: #8f8f8f; --line: #222222;
  --card: #0f0f0f; --hover: #161616; --accent: #ffffff; --on-accent: #0a0a0a;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html, body { margin: 0; }
body {
  background: var(--bg);
  color: var(--fg);
  font: 400 16px/1.55 "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  -webkit-font-smoothing: antialiased;
  transition: background-color .2s, color .2s;
}
a { color: inherit; text-decoration: none; }
.wrap { max-width: 1040px; margin: 0 auto; padding: 0 24px; }
@media (max-width: 600px) { .wrap { padding: 0 16px; } }

/* header */
header .wrap { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 20px; letter-spacing: -0.03em; }
.logo i { width: 14px; height: 11px; background: var(--fg); border-radius: 50% 50% 46% 54% / 60% 55% 45% 40%; display: block; }
.icon-btn {
  width: 38px; height: 38px; border-radius: 999px; border: 1px solid var(--line);
  background: transparent; color: var(--fg); display: grid; place-items: center; cursor: pointer;
}
.icon-btn:hover { background: var(--hover); }
.icon-btn svg { width: 18px; height: 18px; }
.icon-btn .sun { display: none; }
:root[data-dark] .icon-btn .sun { display: block; }
:root[data-dark] .icon-btn .moon { display: none; }

/* hero */
.hero { padding: 72px 0 48px; }
.hero h1 { font-size: clamp(36px, 7vw, 64px); line-height: 1.02; letter-spacing: -0.045em; margin: 0 0 16px; font-weight: 700; }
.hero p { color: var(--muted); font-size: 18px; margin: 0; max-width: 520px; }

/* filters */
.filters { display: flex; gap: 8px; margin: 0 0 24px; flex-wrap: wrap; }
.filters button {
  font: inherit; font-size: 14px; padding: 7px 16px; border-radius: 999px; cursor: pointer;
  border: 1px solid var(--line); background: transparent; color: var(--fg);
}
.filters button:hover { background: var(--hover); }
.filters button[aria-pressed="true"] { background: var(--accent); color: var(--on-accent); border-color: var(--accent); }

/* grid */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(290px, 1fr)); gap: 20px; padding-bottom: 80px; }
.card {
  display: block; border: 1px solid var(--line); border-radius: 16px; overflow: hidden;
  background: var(--card); transition: border-color .15s, transform .15s;
}
.card:hover { border-color: var(--fg); transform: translateY(-2px); }
.card img { width: 100%; aspect-ratio: 16 / 10; object-fit: cover; display: block; border-bottom: 1px solid var(--line); }
.card .body { padding: 16px 18px 18px; }
.card .top { display: flex; align-items: center; justify-content: space-between; gap: 8px; }
.card h2 { font-size: 17px; margin: 0; letter-spacing: -0.01em; }
.card p { margin: 4px 0 0; color: var(--muted); font-size: 14.5px; }
.tag { font-size: 12px; color: var(--muted); border: 1px solid var(--line); border-radius: 999px; padding: 2px 9px; white-space: nowrap; }
.card .arrow { transition: transform .15s; display: inline-block; }
.card:hover .arrow { transform: translateX(3px); }
.card.hidden { display: none; }
div.card { position: relative; }
.card .stretch { position: absolute; inset: 0; z-index: 1; border-radius: 16px; }
.card .store {
  position: relative; z-index: 2; display: inline-flex; align-items: center; gap: 6px; margin-top: 12px;
  font-size: 13px; font-weight: 600; padding: 6px 12px; border-radius: 999px; background: var(--accent); color: var(--on-accent);
}
.card .store:hover { opacity: .85; }
.card .store svg { width: 14px; height: 14px; }

footer { border-top: 1px solid var(--line); color: var(--muted); font-size: 14px; }
footer .wrap { padding-top: 24px; padding-bottom: 32px; display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }

/* product page */
.btn {
  display: inline-flex; align-items: center; gap: 8px; font: inherit; font-weight: 600; font-size: 15px;
  padding: 12px 22px; border-radius: 999px; cursor: pointer; border: 1px solid var(--accent);
}
.btn.solid { background: var(--accent); color: var(--on-accent); }
.btn.solid:hover { opacity: .85; }
.btn.ghost { background: transparent; color: var(--fg); border-color: var(--line); }
.btn.ghost:hover { background: var(--hover); }
.btn svg { width: 17px; height: 17px; }
.actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 28px; }
.back { color: var(--muted); font-size: 14px; }
.back:hover { color: var(--fg); }
.shot { width: 100%; border: 1px solid var(--line); border-radius: 16px; display: block; margin: 8px 0 56px; }
.section { padding: 0 0 56px; }
.section h3 { font-size: 22px; letter-spacing: -0.02em; margin: 0 0 18px; }
.steps { list-style: none; padding: 0; margin: 0; display: grid; gap: 12px; counter-reset: s; }
.steps li { counter-increment: s; display: grid; grid-template-columns: 34px 1fr; gap: 12px; align-items: start; }
.steps li::before {
  content: counter(s); width: 30px; height: 30px; border-radius: 999px; display: grid; place-items: center;
  background: var(--accent); color: var(--on-accent); font-weight: 700; font-size: 14px;
}
.steps li span { padding-top: 3px; }
code { font: 500 14px ui-monospace, "SF Mono", Menlo, monospace; background: var(--hover); border: 1px solid var(--line); padding: 2px 7px; border-radius: 6px; }
.copy { font: inherit; font-size: 13px; margin-left: 6px; padding: 2px 10px; border-radius: 999px; border: 1px solid var(--line); background: transparent; color: var(--fg); cursor: pointer; }
.copy:hover { background: var(--hover); }
.keys { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 12px; }
.key { border: 1px solid var(--line); border-radius: 12px; padding: 14px 16px; }
.key b { display: block; margin-bottom: 2px; }
.key span { color: var(--muted); font-size: 14.5px; }
.note { color: var(--muted); font-size: 14.5px; margin-top: 16px; }