/**
 * Admin Shared Styles — lesson-pages
 * Common patterns used across admin/internal pages.
 * Requires: design-tokens-dark-premium.css loaded first.
 * Version: 1.0
 */

/* ── Login Overlay ───────────────────────────────────────────────────────────── */
.login-overlay {
  position: fixed;
  inset: 0;
  background: var(--color-bg-page);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
}
.login-overlay.hidden { display: none; }

.login-box {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-card);
  border-radius: 16px;
  padding: 40px;
  width: 90%;
  max-width: 400px;
  text-align: center;
}

.login-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin-bottom: 20px;
}

.login-title {
  font-size: 20px;
  font-weight: var(--font-weight-extrabold);
  color: var(--color-text-headline);
  margin-bottom: 6px;
}

.login-subtitle {
  font-size: 13px;
  color: #555;
  margin-bottom: 28px;
}

.login-field {
  width: 100%;
  padding: 12px 16px;
  border-radius: 8px;
  background: #0d0d0d;
  border: 1px solid #1e1e1e;
  color: var(--color-text-body-alt);
  font-size: 14px;
  font-family: var(--font-sans);
  margin-bottom: 12px;
  outline: none;
  transition: border-color var(--transition-fast);
}
.login-field:focus { border-color: #6366f1; }
.login-field::placeholder { color: #333; }
.login-field select { cursor: pointer; }

.login-btn {
  width: 100%;
  padding: 12px;
  border-radius: 8px;
  border: none;
  background: linear-gradient(135deg, #6366f1, #8b5cf6);
  color: #fff;
  font-size: 14px;
  font-weight: var(--font-weight-bold);
  cursor: pointer;
  font-family: var(--font-sans);
  margin-top: 8px;
  transition: opacity var(--transition-fast);
}
.login-btn:hover { opacity: 0.9; }

.login-error {
  font-size: 12px;
  color: #f87171;
  margin-top: 8px;
  min-height: 20px;
}

/* ── Toast Notification ──────────────────────────────────────────────────────── */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  padding: 12px 20px;
  border-radius: 10px;
  font-size: 13px;
  font-weight: var(--font-weight-semibold);
  z-index: 2000;
  transition: all 0.3s;
  transform: translateY(80px);
  opacity: 0;
  font-family: var(--font-sans);
  max-width: 320px;
}
.toast.show { transform: translateY(0); opacity: 1; }
.toast.success { background: #052e16; border: 1px solid #166534; color: #4ade80; }
.toast.error   { background: #2d0a0a; border: 1px solid #7f1d1d; color: #f87171; }
.toast.info    { background: #0f172a; border: 1px solid #1e3a5f; color: #60a5fa; }

@media (max-width: 768px) {
  .toast { bottom: 16px; right: 12px; left: 12px; max-width: none; }
}

/* ── Page Header ─────────────────────────────────────────────────────────────── */
.admin-header {
  background: #101010;
  border-bottom: 1px solid #1a1a1a;
  padding: 16px 24px;
  position: sticky;
  top: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.admin-header-title {
  font-size: 18px;
  font-weight: var(--font-weight-extrabold);
  color: var(--color-text-headline);
  flex: 1;
}

.admin-header-sub {
  font-size: 12px;
  color: #555;
  margin-top: 2px;
}

/* ── View Toggle Buttons ─────────────────────────────────────────────────────── */
.view-toggle {
  display: flex;
  gap: 4px;
  background: #0d0d0d;
  padding: 4px;
  border-radius: 10px;
  border: 1px solid #1a1a1a;
  flex-wrap: wrap;
}

.view-btn {
  padding: 6px 14px;
  border-radius: 7px;
  border: none;
  background: transparent;
  color: #555;
  font-size: 12px;
  font-weight: var(--font-weight-semibold);
  cursor: pointer;
  font-family: var(--font-sans);
  transition: all var(--transition-fast);
  white-space: nowrap;
}
.view-btn:hover { color: var(--color-text-body-alt); }
.view-btn.active {
  background: #1e1e1e;
  color: var(--color-text-headline);
}

/* ── Link Pill ───────────────────────────────────────────────────────────────── */
.link-pill {
  background: rgba(99, 102, 241, 0.12);
  border: 1px solid rgba(99, 102, 241, 0.25);
  border-radius: 999px;
  padding: 8px 16px;
  font-size: 12px;
  font-weight: var(--font-weight-semibold);
  color: #a5b4fc;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all var(--transition-fast);
  white-space: nowrap;
}
.link-pill:hover {
  background: rgba(99, 102, 241, 0.2);
  border-color: rgba(99, 102, 241, 0.4);
}

/* ── Content Layout ──────────────────────────────────────────────────────────── */
.admin-content {
  max-width: 1600px;
  margin: 0 auto;
  padding: 24px 32px 80px;
}

@media (max-width: 768px) {
  .admin-content { padding: 16px 12px 80px; }
  .admin-header { padding: 12px 16px; }
}

/* ── Stats Row ───────────────────────────────────────────────────────────────── */
.stats-row {
  display: flex;
  gap: 12px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.stat-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border-card);
  border-radius: 12px;
  padding: 16px 20px;
  min-width: 140px;
}

.stat-num {
  font-size: 26px;
  font-weight: var(--font-weight-extrabold);
  color: var(--color-text-headline);
  line-height: 1;
}

.stat-label {
  font-size: 11px;
  color: #444;
  margin-top: 2px;
}

/* ── Section Headers ─────────────────────────────────────────────────────────── */
.section-heading {
  font-size: 20px;
  font-weight: var(--font-weight-extrabold);
  color: var(--color-text-headline);
  margin-bottom: 20px;
}

.section-label {
  font-size: 10px;
  font-weight: var(--font-weight-bold);
  color: #444;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 16px;
  margin-top: 32px;
}

/* ── Substitute Select (dropdown) ────────────────────────────────────────────── */
.substitute-select {
  padding: 8px 10px;
  border-radius: 8px;
  background: #0d0d0d;
  border: 1px solid #1e1e1e;
  color: var(--color-text-body-alt);
  font-size: 13px;
  font-family: var(--font-sans);
  outline: none;
  cursor: pointer;
  transition: border-color var(--transition-fast);
}
.substitute-select:focus { border-color: #444; }