/* ===== Welcome Gateway — landing theme ===== */
:root {
  --accent: #14b8a6;
  --accent-2: #38bdf8;
  --ink: #0f172a;
  --ink-soft: #475569;
  --card: rgba(255, 255, 255, 0.72);
  --card-border: rgba(255, 255, 255, 0.9);
  --chip: rgba(15, 23, 42, 0.06);
  --shadow: 0 24px 60px -20px rgba(2, 32, 71, 0.35);
  --radius: 24px;
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body {
  margin: 0;
  font-family: "Segoe UI", system-ui, -apple-system, "Hiragino Kaku Gothic ProN",
    "Noto Sans JP", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(1200px 600px at 80% -10%, #cffafe 0%, transparent 60%),
    radial-gradient(1000px 700px at -10% 110%, #e0e7ff 0%, transparent 55%),
    linear-gradient(160deg, #f0fdfa 0%, #eef2ff 100%);
  min-height: 100%;
  display: grid;
  place-items: center;
  padding: 24px;
}

/* Glass hero card */
.hero { width: 100%; display: grid; place-items: center; }

.card {
  width: min(520px, 100%);
  background: var(--card);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 40px 36px 32px;
  text-align: center;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--ink-soft);
  font-size: 0.95rem;
  text-transform: uppercase;
}
.brand-dot {
  width: 11px; height: 11px; border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 0 4px rgba(20, 184, 166, 0.15);
}

/* Clock */
.clock {
  margin: 22px 0 6px;
  font-size: clamp(3rem, 12vw, 4.6rem);
  font-weight: 800;
  line-height: 1;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.clock .sec { font-size: 0.5em; color: var(--ink-soft); -webkit-text-fill-color: var(--ink-soft); }

.date { font-size: 1.15rem; font-weight: 600; color: var(--ink); }

/* Clock variety list (access time / timezone / status / realtime) */
.clock-list {
  margin: 20px 0 4px;
  border-top: 1px solid var(--chip);
}
.clock-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 11px 4px;
  border-bottom: 1px solid var(--chip);
  font-size: 0.95rem;
}
.cl-label {
  color: var(--ink-soft);
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  font-size: 0.78rem;
}
.cl-val { font-weight: 700; color: var(--ink); }
.cl-val.mono { font-family: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace; }
.clock-row.realtime .cl-val {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.meta {
  display: flex; flex-wrap: wrap; gap: 8px; justify-content: center;
  margin: 18px 0 6px;
}
.chip {
  background: var(--chip);
  color: var(--ink-soft);
  border-radius: 999px;
  padding: 6px 14px;
  font-size: 0.85rem;
  font-weight: 600;
}
.chip-user { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #fff; }

/* Actions */
.actions { display: flex; flex-direction: column; gap: 12px; margin-top: 26px; }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 10px;
  padding: 16px 24px;
  font-size: 1.05rem;
  font-weight: 700;
  border: none;
  border-radius: 14px;
  cursor: pointer;
  text-decoration: none;
  font-family: inherit;
  transition: transform 0.15s ease, box-shadow 0.2s ease, background 0.2s ease;
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #fff;
  box-shadow: 0 12px 24px -8px rgba(20, 184, 166, 0.6);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 18px 30px -10px rgba(20, 184, 166, 0.7); }
.btn-ghost {
  background: var(--chip);
  color: var(--ink-soft);
}
.btn-ghost:hover { background: rgba(15, 23, 42, 0.1); }
.actions form { margin: 0; }
.actions .btn { width: 100%; }

noscript { display: block; margin-top: 14px; color: #dc2626; font-weight: 600; }

/* Dark mode */
@media (prefers-color-scheme: dark) {
  :root {
    --ink: #e2e8f0;
    --ink-soft: #94a3b8;
    --card: rgba(17, 25, 40, 0.7);
    --card-border: rgba(148, 163, 184, 0.18);
    --chip: rgba(148, 163, 184, 0.14);
    --shadow: 0 24px 60px -20px rgba(0, 0, 0, 0.7);
  }
  body {
    background:
      radial-gradient(1200px 600px at 80% -10%, #0f3b3a 0%, transparent 60%),
      radial-gradient(1000px 700px at -10% 110%, #1e1b4b 0%, transparent 55%),
      linear-gradient(160deg, #0b1120 0%, #0f172a 100%);
  }
}