/**
 * @module dashboard-layout
 * @description Login page card, dashboard shell, topbar, tab navigation bar,
 * and main content area layout styles.
 */

/* ── Login Page ───────────────────────────────────── */
#login-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 1rem;
}

.login-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2.5rem 2rem;
  width: 100%;
  max-width: 380px;
}

.login-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 2rem;
}

.login-logo-icon {
  width: 36px;
  height: 36px;
  background: var(--teal);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
}

.login-logo-text {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.02em;
}

.login-subtitle {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 1.75rem;
}

.form-group {
  margin-bottom: 1rem;
}

.form-group label {
  display: block;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.form-group input {
  width: 100%;
  padding: 0.65rem 0.85rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.15s;
}

.form-group input:focus {
  border-color: var(--teal);
}

.login-btn {
  width: 100%;
  padding: 0.7rem;
  background: var(--teal);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  margin-top: 0.5rem;
  transition: background 0.15s;
}

.login-btn:hover { background: var(--teal-lt); }
.login-btn:disabled { opacity: 0.6; cursor: not-allowed; }

.login-error {
  display: none;
  margin-top: 1rem;
  padding: 0.65rem 0.85rem;
  background: rgba(239,68,68,0.08);
  border: 1px solid rgba(239,68,68,0.25);
  border-radius: var(--radius);
  color: #b91c1c;
  font-size: 0.875rem;
}

/* ── Dashboard Shell ──────────────────────────────── */
#dashboard-page { display: none; }

.topbar {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  padding: 0 1.5rem;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 10;
}

.topbar-brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.15rem;
  font-weight: 700;
}

.topbar-brand-icon {
  width: 28px;
  height: 28px;
  background: var(--teal);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.topbar-user {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.logout-btn {
  padding: 0.35rem 0.75rem;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-muted);
  font-size: 0.8rem;
  cursor: pointer;
  transition: all 0.15s;
}

.logout-btn:hover {
  border-color: var(--teal);
  color: var(--teal-lt);
}

/* ── Tabs ─────────────────────────────────────────── */
.tabs {
  display: flex;
  gap: 0;
  border-bottom: 1px solid var(--border);
  padding: 0 1.5rem;
  background: var(--bg-card);
}

.tab {
  padding: 0.85rem 1.25rem;
  font-size: 0.9rem;
  color: var(--text-muted);
  cursor: pointer;
  border: none;
  border-bottom: 2px solid transparent;
  background: none;
  font-family: inherit;
  transition: all 0.15s;
  user-select: none;
}

.tab:hover { color: var(--text); }

.tab.active {
  color: var(--teal-lt);
  border-bottom-color: var(--teal-lt);
}

/* ── Content ──────────────────────────────────────── */
.content {
  padding: 1.5rem;
  max-width: 1200px;
  margin: 0 auto;
}

.tab-panel { display: none; }
.tab-panel.active { display: block; }