:root {
  --bg: #0f1419;
  --fg: #f4f1ea;
  --muted: #9aa3ad;
  --accent: #e8a87c;
  --panel: #1a222c;
  --error: #f07178;
  --ok: #7fd99a;
  --font: "Segoe UI", "Hiragino Sans", "Noto Sans JP", sans-serif;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font);
  color: var(--fg);
  background:
    radial-gradient(1200px 600px at 10% -10%, #2a3b4a 0%, transparent 55%),
    radial-gradient(900px 500px at 100% 0%, #3a2a24 0%, transparent 50%),
    var(--bg);
}
.wrap {
  max-width: 42rem;
  margin: 0 auto;
  padding: 2.5rem 1.25rem 4rem;
}
.kicker {
  letter-spacing: 0.18em;
  font-size: 0.75rem;
  color: var(--accent);
  margin: 0 0 0.5rem;
}
.brand {
  font-size: clamp(2rem, 6vw, 2.8rem);
  margin: 0 0 0.75rem;
  line-height: 1.15;
}
.lead, .muted { color: var(--muted); line-height: 1.55; }
.section-title {
  margin: 2rem 0 0.75rem;
  font-size: 1.1rem;
}
.panel {
  background: color-mix(in srgb, var(--panel) 88%, transparent);
  border: 1px solid color-mix(in srgb, var(--fg) 12%, transparent);
  border-radius: 12px;
  padding: 1.1rem 1.2rem;
  margin-bottom: 0.9rem;
}
.stack { display: grid; gap: 0.75rem; }
input {
  width: 100%;
  padding: 0.7rem 0.85rem;
  border-radius: 8px;
  border: 1px solid color-mix(in srgb, var(--fg) 18%, transparent);
  background: #0c1015;
  color: var(--fg);
}
.btn {
  appearance: none;
  border: 0;
  border-radius: 999px;
  padding: 0.7rem 1.2rem;
  background: var(--accent);
  color: #1a120c;
  font-weight: 650;
  cursor: pointer;
}
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-ghost {
  background: transparent;
  color: var(--fg);
  border: 1px solid color-mix(in srgb, var(--fg) 25%, transparent);
}
.msg { padding: 0.65rem 0.8rem; border-radius: 8px; }
.msg-error { background: color-mix(in srgb, var(--error) 20%, transparent); color: #ffd4d6; }
.msg-ok { background: color-mix(in srgb, var(--ok) 18%, transparent); color: #d7ffe3; }
.meta { display: grid; grid-template-columns: 8rem 1fr; gap: 0.4rem 0.8rem; margin: 0; }
.meta dt { color: var(--muted); }
.meta dd { margin: 0; }