/* ============================================
   Frank's Tools — Design System
   A dark, clean theme for a personal app portal
   ============================================ */

/* ---------- CSS Variables — Dark (default) ---------- */
:root {
  --bg-primary: #0b0b12;
  --bg-secondary: #12121e;
  --bg-card: #1a1a2e;
  --bg-card-hover: #222240;
  --bg-input: #16162a;
  --bg-input-focus: #1e1e38;

  --text-primary: #e8e8f0;
  --text-secondary: #9898b0;
  --text-muted: #686880;
  --text-inverse: #0b0b12;

  --accent: #00d4aa;
  --accent-hover: #00e8bb;
  --accent-dim: rgba(0, 212, 170, 0.15);
  --accent-glow: rgba(0, 212, 170, 0.3);

  --danger: #ff4757;
  --danger-dim: rgba(255, 71, 87, 0.15);
  --warning: #ffa502;
  --success: #2ed573;
  --success-dim: rgba(46, 213, 115, 0.15);

  --border: #2a2a44;
  --border-light: #3a3a54;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 20px var(--accent-glow);

  --header-bg: rgba(11, 11, 18, 0.85);
  --table-hover: rgba(255, 255, 255, 0.02);

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;

  --transition: 200ms ease;
  --transition-slow: 300ms ease;

  --max-width: 1200px;
  --header-height: 64px;
}

/* ---------- CSS Variables — Light ---------- */
[data-theme="light"] {
  --bg-primary: #f2f2f7;
  --bg-secondary: #ffffff;
  --bg-card: #ffffff;
  --bg-card-hover: #f0f0f5;
  --bg-input: #f0f0f5;
  --bg-input-focus: #e8e8f0;

  --text-primary: #1a1a2e;
  --text-secondary: #555570;
  --text-muted: #8888a0;
  --text-inverse: #ffffff;

  --accent: #00b894;
  --accent-hover: #00a07e;
  --accent-dim: rgba(0, 184, 148, 0.12);
  --accent-glow: rgba(0, 184, 148, 0.25);

  --danger: #e04050;
  --danger-dim: rgba(224, 64, 80, 0.1);
  --warning: #e69500;
  --success: #26a65b;
  --success-dim: rgba(38, 166, 91, 0.12);

  --border: #d8d8e3;
  --border-light: #c8c8d5;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
  --shadow-glow: 0 0 20px var(--accent-glow);

  --header-bg: rgba(255, 255, 255, 0.85);
  --table-hover: rgba(0, 0, 0, 0.02);
}

/* ---------- Theme transition (applied by JS on toggle) ---------- */
html.theme-switching *,
html.theme-switching *::before,
html.theme-switching *::after {
  transition: background-color 0.3s ease,
              border-color 0.3s ease,
              color 0.2s ease !important;
}

/* ---------- Reset & Base ---------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover { color: var(--accent-hover); }

img { max-width: 100%; display: block; }

/* ---------- Typography ---------- */
h1 { font-size: 2.5rem; font-weight: 800; letter-spacing: -0.03em; line-height: 1.2; }
h2 { font-size: 1.75rem; font-weight: 700; letter-spacing: -0.02em; }
h3 { font-size: 1.25rem; font-weight: 600; }
h4 { font-size: 1rem; font-weight: 600; }

.section-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  color: var(--text-primary);
}

.text-muted { color: var(--text-secondary); }
.text-sm { font-size: 0.875rem; }
.text-xs { font-size: 0.75rem; }
.text-center { text-align: center; }

/* ---------- Layout ---------- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.page {
  min-height: calc(100vh - var(--header-height));
  padding-top: 2rem;
  padding-bottom: 4rem;
}

/* ---------- Header ---------- */
.header {
  height: var(--header-height);
  background: var(--header-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.header-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--text-primary);
}
.header-logo:hover { color: var(--accent); }

.header-logo-icon {
  width: 32px;
  height: 32px;
  background: var(--accent);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  color: var(--text-inverse);
  font-weight: 800;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.header-user {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.35rem 0.75rem 0.35rem 1rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  font-size: 0.875rem;
}

.header-avatar {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--accent-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  color: var(--accent);
  font-weight: 600;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.55rem 1.25rem;
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 500;
  font-family: inherit;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
  line-height: 1.4;
}
.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--accent);
  color: var(--text-inverse);
}
.btn-primary:hover:not(:disabled) {
  background: var(--accent-hover);
  box-shadow: var(--shadow-glow);
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1px solid var(--border);
}
.btn-secondary:hover:not(:disabled) {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-dim);
}

.btn-danger {
  background: var(--danger-dim);
  color: var(--danger);
  border: 1px solid transparent;
}
.btn-danger:hover:not(:disabled) {
  background: var(--danger);
  color: white;
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
}
.btn-ghost:hover:not(:disabled) {
  color: var(--text-primary);
  background: var(--bg-card);
}

.btn-sm { padding: 0.35rem 0.85rem; font-size: 0.8rem; }
.btn-lg { padding: 0.75rem 1.75rem; font-size: 1rem; }

.btn-block { width: 100%; }

/* ---------- Forms ---------- */
.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: 0.4rem;
  color: var(--text-secondary);
}

.form-input {
  width: 100%;
  padding: 0.7rem 1rem;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-size: 0.95rem;
  font-family: inherit;
  transition: all var(--transition);
  outline: none;
}
.form-input::placeholder { color: var(--text-muted); }
.form-input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-dim);
  background: var(--bg-input-focus);
}
.form-input.is-invalid { border-color: var(--danger); }

.form-error {
  font-size: 0.8rem;
  color: var(--danger);
  margin-top: 0.3rem;
  display: none;
}
.form-error.visible { display: block; }

.form-hint {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.25rem;
}

/* ---------- Cards ---------- */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  transition: all var(--transition);
}
.card:hover {
  border-color: var(--border-light);
  box-shadow: var(--shadow-md);
}

.card-glow:hover {
  border-color: var(--accent);
  box-shadow: 0 0 20px var(--accent-dim);
}

/* ---------- Auth pages (Login / Register) ---------- */
.auth-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 2rem 1.5rem;
}

.auth-card {
  width: 100%;
  max-width: 420px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 2.5rem;
  box-shadow: var(--shadow-lg);
}

.auth-card h1 {
  font-size: 1.5rem;
  margin-bottom: 0.25rem;
}

.auth-card .subtitle {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 1.75rem;
}

.auth-divider {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin: 1.5rem 0;
  color: var(--text-muted);
  font-size: 0.8rem;
}
.auth-divider::before,
.auth-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

.auth-footer-text {
  text-align: center;
  font-size: 0.875rem;
  color: var(--text-secondary);
  margin-top: 1.5rem;
}

.auth-error-banner {
  background: var(--danger-dim);
  border: 1px solid rgba(255, 71, 87, 0.3);
  color: var(--danger);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  margin-bottom: 1.25rem;
  display: none;
}
.auth-error-banner.visible { display: block; }

.auth-success-banner {
  background: var(--success-dim);
  border: 1px solid rgba(46, 213, 115, 0.3);
  color: var(--success);
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  font-size: 0.85rem;
  margin-bottom: 1.25rem;
  display: none;
}
.auth-success-banner.visible { display: block; }

/* ---------- Hero Section (index) ---------- */
.hero {
  text-align: center;
  padding: 4rem 0 3rem;
}

.hero h1 {
  font-size: 3rem;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, var(--accent) 0%, #7c5cbf 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto;
}

/* ---------- App Cards Grid ---------- */
.apps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1.5rem;
  margin-top: 1rem;
}

.app-card {
  display: flex;
  flex-direction: column;
  padding: 1.75rem;
  position: relative;
  overflow: hidden;
}

.app-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), #7c5cbf);
  opacity: 0;
  transition: opacity var(--transition);
}
.app-card:hover::before { opacity: 1; }

.app-card-header {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1rem;
}

.app-card-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--accent-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  flex-shrink: 0;
}

.app-card-info {
  flex: 1;
  min-width: 0;
}

.app-card-name {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 0.15rem;
}

.app-card-meta {
  display: flex;
  align-items: center;
  gap: 1rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.app-card-desc {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.5;
  margin-bottom: 1rem;
  flex: 1;
}

.app-card-features {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1.25rem;
}

.app-card-tag {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  background: var(--accent-dim);
  color: var(--accent);
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 500;
}

.app-card-req {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.app-card-actions {
  display: flex;
  gap: 0.75rem;
  align-items: center;
}

/* ---------- Dashboard ---------- */
.dashboard-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 2rem;
  flex-wrap: wrap;
  gap: 1rem;
}

/* ---------- Admin Panel ---------- */
.admin-page {
  padding-top: 2rem;
  padding-bottom: 4rem;
}

.admin-tabs {
  display: flex;
  gap: 0.25rem;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 0.25rem;
  margin-bottom: 2rem;
  overflow-x: auto;
}

.admin-tab {
  padding: 0.5rem 1.25rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: transparent;
  border: none;
  cursor: pointer;
  font-family: inherit;
  transition: all var(--transition);
  white-space: nowrap;
}
.admin-tab:hover { color: var(--text-primary); }
.admin-tab.active {
  background: var(--bg-card);
  color: var(--text-primary);
}

.admin-section { display: none; }
.admin-section.active { display: block; }

.users-table {
  width: 100%;
  border-collapse: separate;
  border-spacing: 0;
}

.users-table th {
  text-align: left;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
}

.users-table td {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--border);
  font-size: 0.9rem;
}

.users-table tr:last-child td { border-bottom: none; }

.users-table tr:hover td { background: var(--table-hover); }

.badge {
  display: inline-flex;
  align-items: center;
  padding: 0.15rem 0.55rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 600;
}

.badge-approved {
  background: var(--success-dim);
  color: var(--success);
}
.badge-pending {
  background: var(--warning);
  color: var(--text-inverse);
}
.badge-admin {
  background: rgba(124, 92, 191, 0.2);
  color: #b088ff;
}

/* ---------- Alerts / Empty states ---------- */
.empty-state {
  text-align: center;
  padding: 4rem 1rem;
  color: var(--text-secondary);
}
.empty-state-icon { font-size: 3rem; margin-bottom: 1rem; }
.empty-state h3 { margin-bottom: 0.5rem; }

.alert {
  padding: 1rem 1.25rem;
  border-radius: var(--radius-md);
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  font-size: 0.9rem;
}
.alert-info {
  background: var(--accent-dim);
  border: 1px solid rgba(0, 212, 170, 0.2);
  color: var(--accent);
}
.alert-warning {
  background: rgba(255, 165, 2, 0.1);
  border: 1px solid rgba(255, 165, 2, 0.2);
  color: var(--warning);
}

/* ---------- Loading spinner ---------- */
.spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}
.spinner-lg { width: 32px; height: 32px; border-width: 3px; }

@keyframes spin {
  to { transform: rotate(360deg); }
}

.loading-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  padding: 4rem 0;
  color: var(--text-secondary);
}

/* ---------- Pending Approval Page ---------- */
.pending-page {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 2rem 1.5rem;
}

.pending-card {
  text-align: center;
  max-width: 480px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 3rem 2rem;
  box-shadow: var(--shadow-lg);
}

.pending-icon {
  font-size: 3.5rem;
  margin-bottom: 1rem;
}

.pending-card h1 {
  font-size: 1.5rem;
  margin-bottom: 0.75rem;
}

.pending-card p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
  line-height: 1.6;
}

/* ---------- Footer ---------- */
.footer {
  text-align: center;
  padding: 2rem 1.5rem;
  color: var(--text-muted);
  font-size: 0.85rem;
  border-top: 1px solid var(--border);
}

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
  h1 { font-size: 1.75rem; }
  h2 { font-size: 1.35rem; }

  .hero h1 { font-size: 2rem; }
  .hero { padding: 2.5rem 0 2rem; }

  .apps-grid {
    grid-template-columns: 1fr;
  }

  .auth-card {
    padding: 1.75rem;
  }

  .users-table {
    font-size: 0.85rem;
  }
  .users-table th,
  .users-table td {
    padding: 0.6rem 0.75rem;
  }

  .dashboard-header {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 480px) {
  .container { padding: 0 1rem; }

  .header-logo span { display: none; }
}