:root {
  --bg-1: #d7fbff;
  --bg-2: #bff4f6;
  --bg-3: #9de9ef;
  --tiffany: #81d8d0;
  --tiffany-deep: #4ebfba;
  --ink: #12343a;
  --muted: #4f6f75;
  --white: rgba(255,255,255,0.72);
  --border: rgba(255,255,255,0.55);
  --shadow: 0 18px 40px rgba(43, 122, 120, 0.18);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang TC", "Noto Sans TC", sans-serif;
  color: var(--ink);
}

.theme-bg {
  min-height: 100vh;
  background:
    radial-gradient(circle at top, rgba(255,255,255,0.85), transparent 35%),
    linear-gradient(180deg, var(--bg-1), var(--bg-2) 40%, var(--bg-3));
}

.app-shell {
  width: min(100%, 520px);
  margin: 0 auto;
  min-height: 100vh;
  padding: 24px 16px 28px;
}

.login-shell {
  display: flex;
  align-items: center;
}

.glass-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 24px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
}

.login-card {
  width: 100%;
  padding: 24px 20px;
}

.brand-pill, .status-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(129, 216, 208, 0.28);
  color: var(--ink);
  font-size: 13px;
  font-weight: 700;
}

h1 {
  margin: 14px 0 8px;
  font-size: 28px;
  line-height: 1.15;
}

h2 {
  margin: 14px 0 8px;
  font-size: 24px;
}

.subtext, .mini-note, .hero-card p, .future-card li {
  color: var(--muted);
  line-height: 1.55;
}

.stack-form {
  display: grid;
  gap: 12px;
  margin-top: 20px;
}

.field-label, .label, .eyebrow {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: #2b5f66;
}

input {
  width: 100%;
  border: 1px solid rgba(78, 191, 186, 0.22);
  background: rgba(255,255,255,0.92);
  color: var(--ink);
  border-radius: 16px;
  padding: 15px 16px;
  font-size: 16px;
  outline: none;
}

input:focus {
  border-color: var(--tiffany-deep);
  box-shadow: 0 0 0 4px rgba(129, 216, 208, 0.2);
}

.primary-btn, .ghost-btn {
  border: none;
  border-radius: 16px;
  padding: 15px 16px;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
}

.primary-btn {
  margin-top: 8px;
  color: white;
  background: linear-gradient(180deg, var(--tiffany-deep), #41a9a4);
  box-shadow: 0 12px 24px rgba(65, 169, 164, 0.28);
}

.ghost-btn {
  background: rgba(255,255,255,0.7);
  color: var(--ink);
  border: 1px solid rgba(78, 191, 186, 0.18);
}

.alert-error {
  margin-top: 18px;
  padding: 12px 14px;
  border-radius: 16px;
  background: rgba(255, 114, 114, 0.12);
  color: #9a2f2f;
  font-size: 14px;
}

.topbar, .hero-card, .future-card, .info-card {
  padding: 18px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.dashboard-shell {
  display: grid;
  gap: 16px;
}

.info-grid {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.info-card.featured {
  grid-column: 1 / -1;
}

.value {
  margin-top: 8px;
  font-size: 17px;
  font-weight: 700;
  word-break: break-word;
}

.value.large {
  font-size: 28px;
}

.future-card ul {
  margin: 10px 0 0;
  padding-left: 18px;
}

@media (max-width: 520px) {
  .app-shell { padding: 16px 14px 24px; }
  .login-card { padding: 22px 16px; }
  h1 { font-size: 25px; }
  .info-grid { grid-template-columns: 1fr; }
  .value.large { font-size: 25px; }
}