/**
 * Portal 大廳／登入／設定 — 共用版面（配合 createspaces-brand.css）
 */
.cs-school-banner {
  width: 100%;
  overflow: hidden;
  line-height: 0;
  background: #e9ecef;
  border-bottom: 3px solid var(--cs-accent, #0284c7);
}

.cs-school-banner img {
  width: 100%;
  height: clamp(120px, 22vw, 280px);
  object-fit: cover;
  object-position: center;
  display: block;
}

.navbar.cs-page-nav {
  background: rgba(255, 255, 255, 0.96) !important;
  border-bottom: 1px solid var(--cs-border, rgba(15, 23, 42, 0.1));
  box-shadow: 0 1px 3px rgba(15, 23, 42, 0.06);
}

.navbar.cs-page-nav .navbar-brand {
  color: var(--cs-text, #0f172a) !important;
  font-weight: 700;
}

.navbar.cs-page-nav .navbar-text,
.navbar.cs-page-nav .nav-link {
  color: var(--cs-text-muted, #64748b) !important;
}

.portal-page-title {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--cs-text, #0f172a);
}

.portal-hint {
  font-size: 0.95rem;
  color: var(--cs-text-muted, #64748b);
}

.portal-card-h {
  font-size: 1.25rem;
  font-weight: 600;
}

.portal-banner-preview {
  width: 100%;
  max-height: 220px;
  object-fit: cover;
  border-radius: 12px;
  border: 2px solid var(--cs-border, #dee2e6);
}

/* 登入頁 */
.portal-login-body {
  margin: 0;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  font-family: "DM Sans", "Segoe UI", "Microsoft JhengHei", sans-serif;
  padding-bottom: var(--cs-footer-h, 2.75rem);
}

.portal-login-shell {
  flex: 1;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px 16px;
}

.portal-login-card {
  width: 100%;
  max-width: 400px;
  background: var(--cs-bg-card, #fff);
  border-radius: 16px;
  box-shadow: 0 12px 40px rgba(15, 23, 42, 0.1);
  padding: 36px 32px 32px;
  border: 1px solid var(--cs-border, rgba(15, 23, 42, 0.1));
}

.portal-login-card h1 {
  margin: 0 0 8px;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--cs-text, #0f172a);
  text-align: center;
}

.portal-login-card p.sub {
  margin: 0 0 24px;
  text-align: center;
  color: var(--cs-text-muted, #64748b);
  font-size: 0.95rem;
}

/* 大廳 app 捷徑 */
.portal-apps-grid {
  display: flex;
  justify-content: center;
  gap: 40px;
  margin-top: 40px;
  flex-wrap: wrap;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding: 0 16px 48px;
}

.portal-app-tile {
  text-align: center;
  text-decoration: none;
  color: var(--cs-text, #0f172a);
  transition: transform 0.2s, box-shadow 0.2s;
  width: 160px;
  background: var(--cs-bg-card, rgba(255, 255, 255, 0.92));
  border: 1px solid var(--cs-border, rgba(15, 23, 42, 0.1));
  border-radius: 16px;
  padding: 16px 10px 14px;
  box-shadow: var(--cs-glow, 0 8px 30px rgba(2, 132, 199, 0.08));
}

.portal-app-tile:hover {
  transform: translateY(-3px);
  color: var(--cs-accent-dim, #0369a1);
  box-shadow: 0 14px 34px rgba(2, 132, 199, 0.16);
}

.portal-app-tile img {
  width: 108px;
  height: 108px;
  border-radius: 20px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
  margin-bottom: 12px;
  object-fit: cover;
}

.portal-app-tile div {
  font-weight: bold;
  font-size: 15px;
}

.portal-welcome-line {
  text-align: center;
  color: var(--cs-text-muted, #64748b);
  font-size: 1.05rem;
  margin-top: 1rem;
  padding: 0 12px;
}

.portal-school-heading {
  text-align: center;
  color: var(--cs-text, #0f172a);
  font-weight: 700;
  margin-top: 28px;
}