:root {
  color: #17201e;
  background: #edf5f2;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-synthesis: none;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-width: 320px;
  min-height: 100vh;
  background: #edf5f2;
}

.shell {
  width: min(100%, 31rem);
  margin: 0 auto;
  padding: max(1.25rem, env(safe-area-inset-top)) 1rem max(1.5rem, env(safe-area-inset-bottom));
}

.brand {
  display: flex;
  align-items: center;
  gap: .65rem;
  margin: .25rem 0 1.25rem;
  color: #0d5148;
  font-size: 1.05rem;
  font-weight: 750;
  letter-spacing: .02em;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  border-radius: .65rem;
  color: #fff;
  background: #12675b;
  font-size: 1rem;
}

.card {
  background: #fff;
  border: 1px solid #d5e4df;
  border-radius: 1.25rem;
  padding: clamp(1.25rem, 5vw, 2rem);
  box-shadow: 0 .75rem 2.5rem rgba(22, 69, 60, .10);
}

.step {
  display: inline-flex;
  padding: .35rem .65rem;
  border-radius: 999px;
  color: #12675b;
  background: #e1f2ed;
  font-size: .875rem;
  font-weight: 700;
}

h1, h2 { color: #102c27; }

h1 {
  margin: .9rem 0 .65rem;
  font-size: clamp(1.75rem, 8vw, 2.35rem);
  line-height: 1.15;
  letter-spacing: -.025em;
}

h2 {
  margin: .9rem 0 .5rem;
  font-size: 1.55rem;
}

h3 {
  margin: .75rem 0 .45rem;
  color: #14352f;
  font-size: 1.15rem;
}

.lead,
.privacy-note,
.device-note {
  color: #53645f;
  line-height: 1.7;
}

.lead { margin: 0 0 1.25rem; font-size: 1rem; }

.notice {
  margin: 0 0 1rem;
  padding: .8rem .9rem;
  border-left: .25rem solid #75a69a;
  border-radius: .45rem;
  background: #f2f7f5;
  color: #334a44;
  line-height: 1.5;
}

.notice.ready {
  border-left-color: #147666;
  color: #0e594e;
  background: #e9f7f2;
}

.agreements {
  margin: 0;
  padding: 0;
  border: 0;
}

.agreements legend {
  margin-bottom: .6rem;
  color: #263a35;
  font-size: .95rem;
  font-weight: 700;
}

.agreements label {
  display: flex;
  align-items: flex-start;
  gap: .7rem;
  min-height: 2.75rem;
  padding: .6rem 0;
  color: #2f403c;
  font-size: 1rem;
  line-height: 1.55;
}

input[type="checkbox"] {
  width: 1.25rem;
  height: 1.25rem;
  margin: .12rem 0 0;
  accent-color: #12675b;
  flex: 0 0 auto;
}

a { color: #0c6558; text-underline-offset: .18em; }
a:focus-visible, button:focus-visible, input:focus-visible { outline: 3px solid #ed9e40; outline-offset: 3px; }

button {
  width: 100%;
  min-height: 3.1rem;
  border: 0;
  border-radius: .85rem;
  padding: .8rem 1rem;
  font: inherit;
  font-weight: 750;
  cursor: pointer;
}

.primary {
  margin-top: .9rem;
  color: #fff;
  background: #12675b;
}

.primary:hover:not(:disabled) { background: #0d574d; }
.primary:disabled { color: #80908b; background: #dce5e2; cursor: not-allowed; }
.secondary { margin-top: .9rem; color: #174f46; background: #e7f1ee; }

.privacy-note,
.device-note { margin: .9rem 0 0; font-size: .9rem; }

.success-panel { text-align: center; padding: .5rem 0 0; }
.success-icon {
  display: grid;
  place-items: center;
  width: 3.5rem;
  height: 3.5rem;
  margin: 0 auto;
  border-radius: 50%;
  background: #dff3ec;
  color: #12675b;
  font-size: 2rem;
  font-weight: 800;
}

.gateway-card {
  margin-top: 1.35rem;
  padding: 1rem;
  border: 1px solid #d5e4df;
  border-radius: 1rem;
  background: #f8fbfa;
  text-align: left;
}

.gateway-card p,
.gateway-note {
  color: #53645f;
  line-height: 1.6;
}

.gateway-consent {
  display: flex;
  align-items: flex-start;
  gap: .7rem;
  padding: .75rem;
  border-radius: .75rem;
  background: #fff;
  color: #2f403c;
  font-size: .92rem;
  line-height: 1.55;
}

.binding-output {
  display: grid;
  gap: .55rem;
  margin-top: .9rem;
  padding: .9rem;
  border-radius: .75rem;
  background: #e6f4ef;
  color: #265047;
  font-size: .88rem;
}

.binding-output code {
  display: block;
  padding: .7rem;
  border-radius: .55rem;
  background: #fff;
  color: #0b574b;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: .025em;
  overflow-wrap: anywhere;
  user-select: all;
}

.compact { min-height: 2.6rem; margin-top: 0; }
.text-button {
  min-height: 2.6rem;
  margin-top: .45rem;
  color: #8a352f;
  background: transparent;
  text-decoration: underline;
  text-underline-offset: .18em;
}
.gateway-note { margin: .7rem 0 0; font-size: .85rem; }

.error {
  margin-top: 1rem;
  padding: .85rem .9rem;
  border-radius: .65rem;
  color: #7b2721;
  background: #fff0ee;
  line-height: 1.55;
}

footer {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.1rem .25rem 0;
  color: #60716c;
  font-size: .85rem;
}

.legal-card h1 { font-size: 2rem; }
.legal-card h2 { margin-top: 1.5rem; font-size: 1.2rem; }
.legal-card p, .legal-card li { color: #42534f; line-height: 1.75; }
.legal-card ul { padding-left: 1.25rem; }
.legal-meta { color: #6c7b77; font-size: .9rem; }
.back-link { display: inline-block; margin-top: 1.25rem; font-weight: 700; }

[hidden] { display: none !important; }

@media (min-width: 40rem) {
  .shell { padding-top: 3rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; }
}