:root {
  --bg: #212124;
  --panel: rgba(12, 17, 24, 0.78);
  --panel-2: rgba(18, 25, 34, 0.92);
  --cyan: #80D8FF;
  --cyan-2: #36C9F4;
  --orange: #FF8C42;
  --text: #F4F7FB;
  --muted: #9BA7B6;
  --border: rgba(128, 216, 255, 0.28);
}

* { box-sizing: border-box; }

html, body {
  min-height: 100%;
  margin: 0;
  background:
    radial-gradient(circle at 50% 16%, rgba(128, 216, 255, 0.13), transparent 34%),
    radial-gradient(circle at 50% 110%, rgba(255, 140, 66, 0.08), transparent 26%),
    var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans TC", sans-serif;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  background:
    linear-gradient(rgba(128,216,255,0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(128,216,255,0.035) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(circle at center, black, transparent 72%);
  pointer-events: none;
}

.shell {
  position: relative;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 40px 20px;
}

.shell.compact {
  min-height: 76vh;
}

.card {
  width: min(920px, 100%);
  padding: clamp(28px, 5vw, 56px);
  border: 1px solid var(--border);
  border-radius: 32px;
  background:
    linear-gradient(180deg, rgba(255,255,255,0.035), rgba(255,255,255,0.01)),
    var(--panel);
  box-shadow:
    0 24px 90px rgba(0, 0, 0, 0.48),
    0 0 70px rgba(54, 201, 244, 0.11);
  text-align: center;
  backdrop-filter: blur(18px);
}

.eyebrow {
  margin: 0 0 20px;
  color: var(--cyan);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-size: 0.78rem;
}

.hero {
  width: min(420px, 82vw);
  border-radius: 28px;
  display: block;
  margin: 0 auto 28px;
  box-shadow: 0 0 52px rgba(128, 216, 255, 0.14);
}

h1 {
  margin: 0;
  font-size: clamp(2.1rem, 6vw, 4.4rem);
  line-height: 0.98;
  letter-spacing: -0.04em;
}

.lead {
  margin: 18px auto 0;
  max-width: 720px;
  color: var(--muted);
  font-size: clamp(1rem, 2.4vw, 1.24rem);
  line-height: 1.65;
}

.actions {
  display: flex;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 20px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 700;
  transition: transform 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}

.button:hover { transform: translateY(-1px); }

.button.primary {
  color: #071018;
  background: linear-gradient(135deg, var(--cyan), var(--cyan-2));
  box-shadow: 0 10px 32px rgba(54, 201, 244, 0.2);
}

.button.secondary {
  color: var(--text);
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.035);
}

.disabled-login {
  width: fit-content;
  margin: 24px auto 0;
  padding: 12px 18px;
  border: 1px solid rgba(255, 140, 66, 0.34);
  border-radius: 999px;
  color: rgba(255,255,255,0.78);
  background: rgba(255, 140, 66, 0.055);
}

.note {
  margin: 20px auto 0;
  max-width: 640px;
  color: rgba(155, 167, 182, 0.82);
  font-size: 0.92rem;
  line-height: 1.6;
}

.status-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin: 30px auto 0;
  max-width: 680px;
}

.status-grid div {
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: var(--panel-2);
  text-align: left;
}

.status-grid span {
  display: block;
  color: var(--muted);
  font-size: 0.86rem;
  margin-bottom: 6px;
}

.status-grid strong {
  color: var(--text);
  font-size: 1.04rem;
}

.site-footer {
  position: relative;
  padding: 24px 20px 36px;
  text-align: center;
}

.site-footer a {
  color: var(--cyan);
  text-decoration: none;
  font-size: 0.92rem;
}

.site-footer a:hover {
  color: #b8ecff;
  text-decoration: underline;
}

@media (max-width: 640px) {
  .card { border-radius: 24px; }
  .status-grid { grid-template-columns: 1fr; }
  .hero { width: min(330px, 90vw); }
}