/* join — one calm card, readable on a phone first. */
:root {
  --bg: #f4f2ee;
  --card: #ffffff;
  --text: #1f2328;
  --muted: #5d636b;
  --line: #d9d5cd;
  --accent: #2f6f5e;
  --accent-text: #ffffff;
  --accent-soft: #e3efe9;
  --warn-soft: #fbf1dc;
  --warn-line: #e3c98d;
  --error: #b42318;
  --ok: #2f6f5e;
  --radius: 14px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #15181b;
    --card: #1e2226;
    --text: #e8e6e3;
    --muted: #a3a8ae;
    --line: #353b41;
    --accent: #6cc3a6;
    --accent-text: #0e1a16;
    --accent-soft: #1d3029;
    --warn-soft: #2e2818;
    --warn-line: #6b5a2c;
    --error: #ff8a7a;
    --ok: #6cc3a6;
    color-scheme: dark;
  }
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font: 17px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
}

.bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 36rem;
  margin: 0 auto;
  padding: 16px;
}
.host { color: var(--muted); font-size: 0.95rem; overflow-wrap: anywhere; }
.langs { display: flex; gap: 4px; }
.langs button {
  min-width: 44px;
  min-height: 36px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--muted);
  border-radius: 999px;
  font: inherit;
  font-size: 0.85rem;
  cursor: pointer;
}
.langs button[aria-pressed="true"] { background: var(--accent-soft); color: var(--text); border-color: var(--accent); }

.card {
  max-width: 36rem;
  margin: 0 auto 48px;
  padding: 28px 24px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}
@media (max-width: 600px) {
  .card { margin: 0 16px 32px; padding: 24px 18px; }
}

h1 { font-size: 1.6rem; line-height: 1.25; margin: 0 0 12px; }
h1:focus { outline: none; }
p { margin: 0 0 14px; }
.quiet { color: var(--muted); text-align: center; padding: 24px 0; }

.steps { padding-left: 1.4rem; margin: 0 0 18px; }
.steps li { margin-bottom: 10px; padding-left: 4px; }

.notice {
  background: var(--warn-soft);
  border: 1px solid var(--warn-line);
  border-radius: 10px;
  padding: 12px 14px;
  font-size: 0.95rem;
}

form { margin: 0; }
.field { margin-bottom: 16px; }
.row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
@media (max-width: 480px) { .row { grid-template-columns: 1fr; gap: 0; } }

label { display: block; font-weight: 600; margin-bottom: 6px; }
input {
  width: 100%;
  min-height: 48px;
  padding: 10px 12px;
  font: inherit;
  color: var(--text);
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 10px;
}
input:focus { outline: 3px solid var(--accent-soft); border-color: var(--accent); }
#code { font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace; letter-spacing: 0.08em; text-transform: uppercase; }

.hint { color: var(--muted); font-size: 0.88rem; margin: 6px 0 0; }
.status { font-size: 0.9rem; margin: 6px 0 0; min-height: 0; }
.status:empty { display: none; }
.field.invalid input { border-color: var(--error); }
.field.invalid .status, .form-status { color: var(--error); }
.field.valid .status { color: var(--ok); }

button, .button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 10px 20px;
  font: inherit;
  font-weight: 600;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--text);
  cursor: pointer;
  text-decoration: none;
}
.primary { width: 100%; background: var(--accent); border-color: var(--accent); color: var(--accent-text); margin-top: 6px; }
.primary:disabled { opacity: 0.6; cursor: progress; }
button:focus-visible, .button:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; }
.actions { display: grid; gap: 10px; margin-top: 8px; }

.tick {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 1.8rem;
  background: var(--accent-soft);
  color: var(--accent);
  margin-bottom: 16px;
}