:root {
  --bg: #fff;
  --fg: #1d1d1f;
  --muted: #6e6e73;
  --hair: rgba(0, 0, 0, .08);
  --field: #f5f5f7;
  --accent: #0071e3;
  --accent-press: #0062c3;
  --danger: #d70015;
  --radius: 18px;
  --shadow: 0 1px 2px rgba(0,0,0,.04), 0 8px 28px rgba(0,0,0,.06);
  color-scheme: light dark;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000;
    --fg: #f5f5f7;
    --muted: #a1a1a6;
    --hair: rgba(255, 255, 255, .12);
    --field: #1c1c1e;
    --accent: #2997ff;
    --accent-press: #0a84ff;
    --danger: #ff453a;
    --shadow: 0 1px 2px rgba(0,0,0,.4), 0 8px 28px rgba(0,0,0,.4);
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 17px/1.47 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Inter", "Segoe UI", system-ui, sans-serif;
  letter-spacing: -.022em;
  -webkit-font-smoothing: antialiased;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }

/* ---------- bar ---------- */
.bar {
  position: sticky; top: 0; z-index: 10;
  display: flex; align-items: center; justify-content: space-between;
  height: 52px; padding: 0 max(22px, env(safe-area-inset-left));
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--hair);
}
.brand { display: flex; gap: 6px; align-items: center; color: var(--fg); font-weight: 600; font-size: 19px; letter-spacing: -.02em; }
.brand:hover { text-decoration: none; }
.brand svg { width: 22px; height: 22px; }
.bar nav a { color: var(--muted); font-size: 14px; }

main { flex: 1; width: 100%; max-width: 980px; margin: 0 auto; padding: 0 22px; }

/* ---------- hero ---------- */
.hero { text-align: center; padding: clamp(56px, 12vh, 120px) 0 40px; }
h1 {
  margin: 0;
  font: 700 clamp(40px, 7.4vw, 80px)/1.05 -apple-system, BlinkMacSystemFont, "SF Pro Display", "Inter", system-ui, sans-serif;
  letter-spacing: -.035em;
}
.lede { margin: 18px auto 0; max-width: 34ch; color: var(--muted); font-size: clamp(19px, 2.2vw, 22px); line-height: 1.38; }

.field {
  display: flex; align-items: center; gap: 6px;
  max-width: 640px; margin: 40px auto 0; padding: 6px 6px 6px 22px;
  background: var(--field); border-radius: 999px;
  border: 1px solid transparent;
  transition: border-color .2s, box-shadow .2s, background .2s;
}
.field:focus-within { background: var(--bg); border-color: var(--accent); box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 18%, transparent); }
.field input {
  flex: 1; min-width: 0; height: 48px;
  border: 0; outline: 0; background: transparent; color: var(--fg);
  font: inherit; font-size: 17px;
}
.field input::placeholder { color: var(--muted); }
button { font: inherit; cursor: pointer; border: 0; }
.ghost { height: 40px; padding: 0 14px; border-radius: 999px; background: transparent; color: var(--accent); font-size: 15px; }
.ghost:hover { background: var(--hair); }
.primary {
  position: relative; height: 48px; min-width: 88px; padding: 0 24px;
  border-radius: 999px; background: var(--accent); color: #fff; font-weight: 600; font-size: 17px;
  transition: background .15s, transform .1s;
}
.primary:hover { background: var(--accent-press); }
.primary:active { transform: scale(.97); }
.primary .spinner {
  position: absolute; inset: 0; margin: auto; width: 20px; height: 20px;
  border: 2px solid rgba(255,255,255,.35); border-top-color: #fff; border-radius: 50%;
  opacity: 0; animation: spin .7s linear infinite;
}
.busy .primary .label { opacity: 0; }
.busy .primary .spinner { opacity: 1; }
@keyframes spin { to { transform: rotate(360deg); } }

.error { margin: 16px auto 0; max-width: 560px; color: var(--danger); font-size: 15px; }
.kinds { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; margin: 22px 0 0; padding: 0; list-style: none; }
.kinds li { font-size: 13px; color: var(--muted); padding: 4px 12px; border: 1px solid var(--hair); border-radius: 999px; }

/* ---------- result ---------- */
.result { scroll-margin-top: 72px; padding: 8px 0 48px; animation: rise .45s cubic-bezier(.2,.8,.2,1); }
@keyframes rise { from { opacity: 0; transform: translateY(12px); } }

.owner { display: flex; align-items: center; gap: 14px; margin: 0 auto 24px; max-width: 760px; }
.owner img { width: 44px; height: 44px; border-radius: 50%; object-fit: cover; background: var(--field); }
.owner .who { flex: 1; min-width: 0; }
.owner b { display: block; font-size: 17px; }
.owner small { display: block; color: var(--muted); font-size: 14px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.pill {
  display: inline-flex; align-items: center; gap: 6px; height: 36px; padding: 0 18px;
  border-radius: 999px; background: var(--fg); color: var(--bg); font-weight: 600; font-size: 15px; white-space: nowrap;
}
.pill:hover { text-decoration: none; opacity: .85; }

.profile { text-align: center; margin: 0 auto 32px; }
.profile .avatar { width: 128px; height: 128px; border-radius: 50%; object-fit: cover; background: var(--field); box-shadow: var(--shadow); }
.profile h2 { margin: 16px 0 2px; font-size: 28px; letter-spacing: -.025em; }
.profile .stats { color: var(--muted); font-size: 15px; margin: 0 0 18px; }
.profile .note { color: var(--muted); font-size: 15px; margin-top: 18px; }

.grid {
  display: grid; gap: 14px; margin: 0 auto; max-width: 760px;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 220px), 1fr));
  align-items: start;
}
.grid.single { grid-template-columns: minmax(0, 420px); justify-content: center; }
.card { margin: 0; border-radius: var(--radius); overflow: hidden; background: var(--field); box-shadow: var(--shadow); }
.card .media { position: relative; aspect-ratio: 4 / 5; background: var(--field); }
.card img, .card video { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; display: block; }
.badge {
  position: absolute; top: 10px; left: 10px; padding: 3px 9px; border-radius: 999px;
  background: rgba(0,0,0,.55); color: #fff; font-size: 12px; font-weight: 600;
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
}
.card figcaption { padding: 10px; }
.save {
  display: flex; align-items: center; justify-content: center; height: 40px; border-radius: 12px;
  background: var(--bg); color: var(--fg); font-weight: 600; font-size: 15px;
}
.save:hover { text-decoration: none; background: var(--hair); }
.save[aria-busy="true"] { color: var(--muted); pointer-events: none; }

.skeleton .media { background: linear-gradient(100deg, var(--field) 30%, var(--hair) 50%, var(--field) 70%) 0 0 / 300% 100%; animation: shimmer 1.2s infinite; }
.skeleton .save { color: transparent; }
@keyframes shimmer { to { background-position: -150% 0; } }

/* ---------- how ---------- */
.how { border-top: 1px solid var(--hair); padding: 56px 0 24px; }
.how ol { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 28px; list-style: none; margin: 0; padding: 0; }
.how li { display: flex; gap: 14px; }
.how li > span { flex: none; display: grid; place-items: center; width: 30px; height: 30px; border-radius: 50%; background: var(--field); font-weight: 600; font-size: 14px; }
.how b { font-size: 17px; }
.how p { margin: 4px 0 0; color: var(--muted); font-size: 15px; }

/* ---------- footer & prose ---------- */
footer { padding: 32px 22px 40px; text-align: center; color: var(--muted); font-size: 12px; border-top: 1px solid var(--hair); }
footer p { max-width: 640px; margin: 4px auto; }
.prose { max-width: 680px; margin: 0 auto; padding: 64px 0; }
.prose h1 { font-size: clamp(34px, 5vw, 48px); margin-bottom: 24px; }
.prose h2 { font-size: 21px; margin-top: 36px; }
.prose p, .prose li { color: var(--muted); }

@media (max-width: 520px) {
  .field { padding-left: 16px; }
  .primary { min-width: 72px; padding: 0 18px; }
  .owner { flex-wrap: wrap; }
}
@media (prefers-reduced-motion: reduce) { *, *::before, *::after { animation: none !important; transition: none !important; } }

/* ---------- iPhone setup guide ---------- */
.hero.small { padding: clamp(40px, 8vh, 80px) 0 24px; }
.guide { max-width: 640px; margin: 0 auto; padding-bottom: 56px; }
.guide .note { background: var(--field); border-radius: 14px; padding: 14px 16px; font-size: 15px; color: var(--muted); }
.steps { list-style: none; counter-reset: s; margin: 28px 0 0; padding: 0; }
.steps > li { counter-increment: s; position: relative; padding: 0 0 28px 48px; }
.steps > li::before {
  content: counter(s); position: absolute; left: 0; top: 0; width: 32px; height: 32px; border-radius: 50%;
  display: grid; place-items: center; background: var(--accent); color: #fff; font-weight: 600; font-size: 15px;
}
.steps h2, .summary h2 { margin: 3px 0 6px; font-size: 19px; letter-spacing: -.02em; }
.steps p { margin: 6px 0; font-size: 16px; }
.copy { display: flex; align-items: center; gap: 8px; margin: 8px 0; padding: 8px 8px 8px 14px; background: var(--field); border-radius: 12px; }
.copy code { flex: 1; min-width: 0; font: 13px/1.4 ui-monospace, SFMono-Regular, Menlo, monospace; word-break: break-all; }
.copy button { flex: none; height: 34px; padding: 0 14px; border-radius: 999px; background: var(--accent); color: #fff; font-weight: 600; font-size: 14px; }
.copy button.done { background: #34c759; }
p code, li code { font: 14px ui-monospace, SFMono-Regular, Menlo, monospace; background: var(--field); padding: 1px 5px; border-radius: 6px; }
.summary { margin-top: 8px; padding: 18px 20px; border: 1px solid var(--hair); border-radius: 16px; }
.summary ol { margin: 8px 0 0; padding-left: 20px; font-size: 15px; }
.summary li { margin: 6px 0; }