:root {
  color-scheme: light;
  --bg: #f2f6f4;
  --surface: #ffffff;
  --text: #12211b;
  --muted: #627069;
  --line: #dce5e0;
  --accent: #146c4b;
  --accent-strong: #0b5338;
  --accent-soft: #e3f4ec;
  --danger: #9b2c2c;
  --danger-soft: #fff0f0;
  --warning: #73510a;
  --warning-soft: #fff7dd;
  --radius: 24px;
  --shadow: 0 18px 50px rgba(22, 55, 42, 0.09);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  color: var(--text);
  background:
    radial-gradient(circle at 20% 0%, rgba(126, 205, 169, 0.22), transparent 34rem),
    var(--bg);
}

button, input { font: inherit; }

button, a { -webkit-tap-highlight-color: transparent; }

.shell {
  width: min(720px, calc(100% - 32px));
  margin: 0 auto;
  padding: 28px 0 48px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 22px;
  font-weight: 760;
}

.brand__mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 11px;
  color: #fff;
  background: var(--accent);
}

.privacy-pill {
  margin-left: auto;
  padding: 6px 10px;
  border: 1px solid #b8dacb;
  border-radius: 999px;
  color: var(--accent-strong);
  background: rgba(255, 255, 255, 0.65);
  font-size: 0.78rem;
  font-weight: 650;
}

.card {
  margin-bottom: 18px;
  padding: clamp(24px, 5vw, 42px);
  border: 1px solid rgba(21, 84, 58, 0.09);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.eyebrow {
  margin-bottom: 8px;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.11em;
  text-transform: uppercase;
}

h1, h2, h3, p { margin-top: 0; }
h1 { margin-bottom: 14px; font-size: clamp(2rem, 7vw, 3.35rem); line-height: 1.02; letter-spacing: -0.045em; }
h2 { font-size: 1.6rem; letter-spacing: -0.025em; }
h3 { margin-bottom: 5px; font-size: 1.03rem; }
.lead { max-width: 590px; margin-bottom: 30px; color: var(--muted); font-size: 1.05rem; line-height: 1.6; }

label, legend { font-size: 0.9rem; font-weight: 720; }

.code-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 10px;
  margin-top: 9px;
}

input[type="text"] {
  width: 100%;
  min-height: 54px;
  padding: 0 16px;
  border: 1px solid #aebeb6;
  border-radius: 14px;
  color: var(--text);
  background: #fff;
  font-size: 1.15rem;
  font-weight: 750;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

input[type="text"]:focus, button:focus-visible, a:focus-visible, summary:focus-visible {
  outline: 3px solid rgba(20, 108, 75, 0.26);
  outline-offset: 2px;
}

.button, button {
  min-height: 48px;
  border-radius: 14px;
  cursor: pointer;
  font-weight: 760;
}

.primary {
  padding: 0 20px;
  border: 1px solid var(--accent);
  color: #fff;
  background: var(--accent);
}

.primary:hover { background: var(--accent-strong); }
.primary:disabled { cursor: wait; opacity: 0.64; }

.secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 18px;
  border: 1px solid #b8c8c0;
  color: var(--accent-strong);
  background: #fff;
  text-decoration: none;
}

.hint { margin: 8px 0 24px; color: var(--muted); font-size: 0.82rem; }

.device-row {
  display: flex;
  align-items: center;
  gap: 8px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.9rem;
}

.device-row strong { color: var(--text); }
.link-button { min-height: auto; margin-left: auto; padding: 6px; border: 0; color: var(--accent); background: transparent; }

.platform-picker { margin: 16px 0 0; padding: 15px; border: 1px solid var(--line); border-radius: 14px; }
.platform-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px; margin-top: 10px; }
.platform-grid label { padding: 11px; border-radius: 10px; background: var(--bg); cursor: pointer; }

.status { margin-top: 18px; padding: 13px 15px; border-radius: 12px; line-height: 1.45; }
.status--error { color: var(--danger); background: var(--danger-soft); }
.status--busy { color: var(--warning); background: var(--warning-soft); }

.result { position: relative; overflow: hidden; }
.success-mark { position: absolute; top: 25px; right: 28px; display: grid; place-items: center; width: 42px; height: 42px; border-radius: 50%; color: #fff; background: var(--accent); font-size: 1.4rem; }
.result > p { color: var(--muted); }

.steps { margin-top: 28px; border-top: 1px solid var(--line); }
.step { display: grid; grid-template-columns: 34px minmax(0, 1fr); gap: 14px; padding: 22px 0; border-bottom: 1px solid var(--line); }
.step__number { display: grid; place-items: center; width: 30px; height: 30px; border-radius: 50%; color: var(--accent-strong); background: var(--accent-soft); font-weight: 800; }
.step p { margin-bottom: 13px; color: var(--muted); font-size: 0.92rem; line-height: 1.5; }
.step .button { margin: 4px 7px 4px 0; }
.qr-step img { display: block; max-width: 100%; height: auto; padding: 9px; border: 1px solid var(--line); border-radius: 14px; background: #fff; }

.notice { display: flex; gap: 10px; margin-top: 22px; padding: 14px; border-radius: 12px; color: #5d4913; background: var(--warning-soft); font-size: 0.86rem; line-height: 1.45; }
.routing-note { margin-top: 12px; padding: 14px; border-radius: 12px; color: var(--accent-strong); background: var(--accent-soft); font-size: 0.86rem; line-height: 1.5; }

.admin-shell { width: min(1040px, calc(100% - 32px)); }
.admin-grid { display: grid; grid-template-columns: minmax(260px, 0.8fr) minmax(0, 1.2fr); gap: 18px; }
.admin-grid .card { margin-bottom: 0; }
.admin-form { display: grid; gap: 14px; }
.admin-form label { display: grid; gap: 7px; }
.admin-form input, .admin-form select {
  width: 100%;
  min-height: 48px;
  padding: 0 13px;
  border: 1px solid #aebeb6;
  border-radius: 12px;
  color: var(--text);
  background: var(--surface);
  font: inherit;
}
.admin-form input[type="password"], .admin-form input[type="number"] { letter-spacing: normal; text-transform: none; }
.admin-actions { display: flex; flex-wrap: wrap; gap: 9px; }
.admin-actions button { flex: 1 1 150px; }
.admin-bar { display: flex; align-items: center; gap: 12px; margin-bottom: 18px; }
.admin-bar h1 { margin: 0; font-size: clamp(1.55rem, 5vw, 2.4rem); }
.admin-bar .link-button { margin-left: auto; }
.secret-result { margin-top: 16px; padding: 16px; border: 1px solid #b8dacb; border-radius: 14px; background: var(--accent-soft); }
.secret-code { display: block; margin: 8px 0 12px; font: 800 1.45rem/1.2 ui-monospace, SFMono-Regular, Consolas, monospace; letter-spacing: 0.12em; overflow-wrap: anywhere; }
.device-list { display: grid; gap: 10px; margin-top: 16px; }
.device { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 10px; padding: 14px; border: 1px solid var(--line); border-radius: 13px; }
.device h3 { margin: 0 0 4px; }
.device p { margin: 0; color: var(--muted); font-size: 0.84rem; line-height: 1.5; }
.device .danger-button { align-self: center; }
.danger-button { padding: 0 14px; border: 1px solid #d9aaaa; color: var(--danger); background: var(--danger-soft); }
.state-pill { display: inline-block; margin-left: 6px; padding: 2px 7px; border-radius: 999px; color: var(--accent-strong); background: var(--accent-soft); font-size: 0.72rem; }
.state-pill--revoked { color: var(--danger); background: var(--danger-soft); }
.status-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; margin-top: 14px; }
.status-metric { padding: 11px; border-radius: 11px; background: var(--bg); }
.status-metric span { display: block; color: var(--muted); font-size: 0.75rem; }
.status-metric strong { display: block; margin-top: 3px; overflow-wrap: anywhere; }

.help { padding-top: 26px; padding-bottom: 26px; }
.help h2 { font-size: 1.15rem; }
details { padding: 14px 0; border-top: 1px solid var(--line); }
details:last-child { padding-bottom: 0; }
summary { cursor: pointer; font-weight: 700; }
details p { margin: 10px 0 0; color: var(--muted); line-height: 1.55; }

footer { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; padding: 8px 10px; color: var(--muted); font-size: 0.78rem; text-align: center; }
noscript { display: block; padding: 16px; color: var(--danger); text-align: center; }

[hidden] { display: none !important; }

@media (max-width: 560px) {
  .shell { width: min(100% - 20px, 720px); padding-top: 16px; }
  .card { border-radius: 20px; }
  .code-row { grid-template-columns: 1fr; }
  .code-row .primary { width: 100%; min-height: 52px; }
  .device-row { align-items: flex-start; flex-wrap: wrap; }
  .platform-grid { grid-template-columns: 1fr; }
  .notice { flex-direction: column; }
  .step .button { width: 100%; }
  .admin-shell { width: min(100% - 20px, 1040px); }
  .admin-grid { grid-template-columns: 1fr; }
  .device { grid-template-columns: 1fr; }
  .device .danger-button { width: 100%; }
  .status-grid { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: no-preference) {
  .card { animation: rise 420ms ease-out both; }
  .result { animation-delay: 80ms; }
  @keyframes rise { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --bg: #0f1713;
    --surface: #18231e;
    --text: #eef7f2;
    --muted: #aabbb2;
    --line: #314039;
    --accent: #65c99d;
    --accent-strong: #8adeb8;
    --accent-soft: #203f33;
    --danger: #ffaaaa;
    --danger-soft: #402626;
    --warning: #f1d37e;
    --warning-soft: #3d3420;
    --shadow: none;
  }
  body { background: radial-gradient(circle at 20% 0%, rgba(55, 129, 96, 0.2), transparent 34rem), var(--bg); }
  .privacy-pill { background: rgba(24, 35, 30, 0.7); }
  input[type="text"], .secondary, .admin-form input, .admin-form select { color: var(--text); background: #111a16; }
  .qr-step img { background: #fff; }
}