/* ============================================================
   Arabic Python Editor — Design System
   Dark-first, RTL-first, WCAG AA compliant
   ============================================================ */

/* ---------- CSS Custom Properties (Design Tokens) ---------- */
:root {
  /* Dark theme (default) */
  --bg-primary:   #0f1117;
  --bg-secondary: #1a1d27;
  --bg-card:      #1e2130;
  --bg-hover:     #252840;
  --border:       #2d3148;
  --border-light: #3a3f5c;

  --text-primary:   #e8eaf6;
  --text-secondary: #9fa8da;
  --text-muted:     #616794;

  --accent:        #6c63ff;
  --accent-hover:  #7c74ff;
  --accent-light:  rgba(108, 99, 255, 0.15);
  --accent-glow:   rgba(108, 99, 255, 0.3);

  --success:  #4caf7d;
  --warning:  #ffb74d;
  --danger:   #ef5350;
  --info:     #42a5f5;

  --nav-height: 64px;
  --footer-height: 72px;
  --radius-sm: 6px;
  --radius:    10px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,.4);
  --shadow:    0 4px 16px rgba(0,0,0,.5);
  --shadow-lg: 0 8px 32px rgba(0,0,0,.6);

  --transition: 200ms cubic-bezier(.4,0,.2,1);
  --font-body: 'IBM Plex Sans Arabic', 'Segoe UI', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
}

/* Light theme */
[data-theme="light"] {
  --bg-primary:   #f5f6fa;
  --bg-secondary: #ffffff;
  --bg-card:      #ffffff;
  --bg-hover:     #f0f1f8;
  --border:       #e0e3f0;
  --border-light: #c8cde8;

  --text-primary:   #1a1d2e;
  --text-secondary: #4a4f7a;
  --text-muted:     #8890b8;

  --accent:       #5c54e8;
  --accent-hover: #4a43d4;
  --accent-light: rgba(92, 84, 232, 0.1);
  --accent-glow:  rgba(92, 84, 232, 0.2);

  --shadow-sm: 0 1px 3px rgba(0,0,0,.08);
  --shadow:    0 4px 16px rgba(0,0,0,.1);
  --shadow-lg: 0 8px 32px rgba(0,0,0,.15);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.65;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background-color var(--transition), color var(--transition);
  direction: rtl;
}

/* ---------- Typography ---------- */
h1, h2, h3, h4, h5, h6 {
  line-height: 1.3;
  font-weight: 700;
  color: var(--text-primary);
}
h1 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
h2 { font-size: clamp(1.4rem, 3vw, 2rem); }
h3 { font-size: clamp(1.15rem, 2.5vw, 1.5rem); }

p { color: var(--text-secondary); margin-bottom: 1rem; }
a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent-hover); }
a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

/* ---------- Navbar ---------- */
.navbar {
  background-color: var(--bg-secondary) !important;
  border-bottom: 1px solid var(--border);
  height: var(--nav-height);
  position: sticky;
  top: 0;
  z-index: 1030;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: var(--shadow-sm);
  transition: background-color var(--transition);
}

.navbar-brand {
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--accent) !important;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.navbar-brand:hover { color: var(--accent-hover) !important; }

.nav-link {
  color: var(--text-secondary) !important;
  font-weight: 500;
  padding: 0.5rem 0.85rem !important;
  border-radius: var(--radius-sm);
  transition: color var(--transition), background-color var(--transition);
}
.nav-link:hover, .nav-link.active {
  color: var(--text-primary) !important;
  background-color: var(--bg-hover);
}
.nav-link:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.navbar-toggler {
  border-color: var(--border) !important;
  color: var(--text-secondary) !important;
}
.navbar-toggler-icon {
  filter: invert(1) sepia(1) saturate(0) hue-rotate(0deg);
}
[data-theme="light"] .navbar-toggler-icon { filter: none; }

.dropdown-menu {
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 0.5rem;
  min-width: 200px;
}
.dropdown-item {
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  padding: 0.5rem 0.85rem;
  transition: background-color var(--transition), color var(--transition);
  font-size: 0.9rem;
}
.dropdown-item:hover {
  background-color: var(--bg-hover);
  color: var(--text-primary);
}
.dropdown-item:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.dropdown-divider { border-color: var(--border); }

/* ---------- Theme Toggle Button ---------- */
#theme-toggle {
  background: var(--bg-hover);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  padding: 0.4rem 0.6rem;
  cursor: pointer;
  transition: all var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  flex-shrink: 0;
}
#theme-toggle:hover {
  background: var(--accent-light);
  border-color: var(--accent);
  color: var(--accent);
}
#theme-toggle:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
#theme-toggle svg { width: 18px; height: 18px; pointer-events: none; }

/* ---------- Main Content ---------- */
main {
  flex: 1;
  padding-top: 2rem;
  padding-bottom: 3rem;
}

.container { max-width: 1100px; }

/* ---------- Cards ---------- */
.card {
  background-color: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition), border-color var(--transition);
}
.card:hover { box-shadow: var(--shadow); border-color: var(--border-light); }
.card-body { padding: 1.75rem; }
.card-title { color: var(--text-primary); font-weight: 700; }
.card-text { color: var(--text-secondary); }

/* ---------- Buttons ---------- */
.btn {
  border-radius: var(--radius-sm);
  font-weight: 600;
  padding: 0.55rem 1.25rem;
  font-size: 0.9rem;
  transition: all var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  cursor: pointer;
  min-height: 44px;
}
.btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}
.btn:disabled { opacity: 0.55; cursor: not-allowed; }

.btn-primary {
  background-color: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.btn-primary:hover:not(:disabled) {
  background-color: var(--accent-hover);
  border-color: var(--accent-hover);
  box-shadow: 0 0 0 4px var(--accent-glow);
}

.btn-outline-primary {
  border-color: var(--accent);
  color: var(--accent);
  background: transparent;
}
.btn-outline-primary:hover:not(:disabled) {
  background-color: var(--accent-light);
  border-color: var(--accent);
  color: var(--accent);
}

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

.btn-danger {
  background-color: var(--danger);
  border-color: var(--danger);
  color: #fff;
}
.btn-success {
  background-color: var(--success);
  border-color: var(--success);
  color: #fff;
}

/* ---------- Forms ---------- */
.form-label {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.875rem;
  margin-bottom: 0.4rem;
}
.form-control, .form-select {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border);
  color: var(--text-primary);
  border-radius: var(--radius-sm);
  padding: 0.6rem 0.9rem;
  font-size: 0.95rem;
  transition: border-color var(--transition), box-shadow var(--transition);
  min-height: 44px;
}
.form-control:focus, .form-select:focus {
  background-color: var(--bg-secondary);
  border-color: var(--accent);
  color: var(--text-primary);
  box-shadow: 0 0 0 3px var(--accent-glow);
  outline: none;
}
.form-control::placeholder { color: var(--text-muted); }
.form-control.is-invalid { border-color: var(--danger); }
.form-control.is-valid { border-color: var(--success); }
.invalid-feedback { color: var(--danger); font-size: 0.8rem; }
.valid-feedback { color: var(--success); font-size: 0.8rem; }

/* Crispy forms override */
.asteriskField { color: var(--danger); margin-inline-start: 2px; }
.helptext { color: var(--text-muted); font-size: 0.8rem; }

/* ---------- Alerts ---------- */
.alert {
  border-radius: var(--radius);
  border: 1px solid transparent;
  padding: 0.9rem 1.2rem;
  font-size: 0.9rem;
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
}
.alert-success {
  background-color: rgba(76, 175, 125, 0.12);
  border-color: rgba(76, 175, 125, 0.3);
  color: var(--success);
}
.alert-danger, .alert-error {
  background-color: rgba(239, 83, 80, 0.12);
  border-color: rgba(239, 83, 80, 0.3);
  color: var(--danger);
}
.alert-warning {
  background-color: rgba(255, 183, 77, 0.12);
  border-color: rgba(255, 183, 77, 0.3);
  color: var(--warning);
}
.alert-info {
  background-color: rgba(66, 165, 245, 0.12);
  border-color: rgba(66, 165, 245, 0.3);
  color: var(--info);
}
.btn-close {
  filter: invert(1) sepia(1) saturate(0);
  opacity: 0.6;
}
[data-theme="light"] .btn-close { filter: none; }

/* ---------- Footer ---------- */
footer {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: 1.25rem 0;
  color: var(--text-muted);
  font-size: 0.85rem;
  text-align: center;
  margin-top: auto;
}
footer a { color: var(--text-muted); }
footer a:hover { color: var(--accent); }

/* ---------- Auth Pages ---------- */
.auth-wrapper {
  min-height: calc(100vh - var(--nav-height) - var(--footer-height));
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem 1rem;
}
.auth-card {
  width: 100%;
  max-width: 440px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  box-shadow: var(--shadow-lg);
}
.auth-card h1 {
  font-size: 1.6rem;
  margin-bottom: 0.4rem;
  text-align: center;
}
.auth-card .auth-subtitle {
  color: var(--text-muted);
  font-size: 0.9rem;
  text-align: center;
  margin-bottom: 2rem;
}
.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-link {
  text-align: center;
  margin-top: 1.5rem;
  font-size: 0.875rem;
  color: var(--text-muted);
}
.auth-link a { color: var(--accent); font-weight: 600; }

/* ---------- Error Pages ---------- */
.error-page {
  min-height: calc(100vh - var(--nav-height) - var(--footer-height));
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 2rem;
}
.error-code {
  font-size: clamp(5rem, 15vw, 9rem);
  font-weight: 900;
  line-height: 1;
  background: linear-gradient(135deg, var(--accent), #a78bfa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 1rem;
}
.error-title { font-size: 1.5rem; margin-bottom: 0.75rem; }
.error-desc { color: var(--text-muted); max-width: 420px; margin: 0 auto 2rem; }

/* ---------- Home Hero ---------- */
.hero-section {
  padding: 5rem 0 4rem;
  text-align: center;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--accent-light);
  color: var(--accent);
  border: 1px solid rgba(108, 99, 255, 0.3);
  border-radius: 999px;
  padding: 0.35rem 1rem;
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
}
.hero-title {
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 1.25rem;
  letter-spacing: -0.02em;
}
.hero-title .highlight {
  background: linear-gradient(135deg, var(--accent), #a78bfa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-desc {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto 2.5rem;
  line-height: 1.7;
}
.hero-actions { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

/* Features Grid */
.features-section { padding: 4rem 0; }
.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  height: 100%;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.feature-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow);
  border-color: var(--accent);
}
.feature-icon {
  width: 48px;
  height: 48px;
  background: var(--accent-light);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
  color: var(--accent);
}
.feature-icon svg { width: 24px; height: 24px; }

/* Stats */
.stats-section {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 3rem 0;
}
.stat-item { text-align: center; }
.stat-number {
  font-size: 2.25rem;
  font-weight: 900;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 0.4rem;
}
.stat-label { color: var(--text-muted); font-size: 0.875rem; }

/* ---------- Badges ---------- */
.badge {
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 0.75rem;
  padding: 0.3em 0.65em;
}
.bg-primary { background-color: var(--accent) !important; }

/* ---------- Tables ---------- */
.table {
  color: var(--text-primary);
  border-color: var(--border);
}
.table th { color: var(--text-muted); font-weight: 600; font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.05em; }
.table td { color: var(--text-secondary); vertical-align: middle; }
.table-hover tbody tr:hover { background-color: var(--bg-hover); }

/* ---------- Pagination ---------- */
.page-link {
  background-color: var(--bg-card);
  border-color: var(--border);
  color: var(--text-secondary);
  border-radius: var(--radius-sm) !important;
  margin: 0 2px;
  min-width: 38px;
  min-height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.page-link:hover { background-color: var(--bg-hover); color: var(--text-primary); border-color: var(--border-light); }
.page-item.active .page-link { background-color: var(--accent); border-color: var(--accent); color: #fff; }

/* ---------- Scrollbar ---------- */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--border-light); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* ---------- Selection ---------- */
::selection { background: var(--accent-light); color: var(--accent); }

/* ---------- Utilities ---------- */
.text-accent { color: var(--accent); }
.text-muted-custom { color: var(--text-muted); }
.bg-card { background-color: var(--bg-card); }
.border-custom { border-color: var(--border) !important; }

/* ---------- Skip Link (Accessibility) ---------- */
.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  background: var(--accent);
  color: #fff;
  padding: 0.5rem 1rem;
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  font-weight: 600;
  z-index: 9999;
  transition: top 0.2s;
}
.skip-link:focus { top: 0; }

/* ---------- Loading Spinner ---------- */
.spinner-border { color: var(--accent); }

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
  .auth-card { padding: 1.75rem 1.25rem; }
  .hero-section { padding: 3rem 0 2.5rem; }
  .navbar-collapse {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    padding: 1rem;
    margin-top: 0.5rem;
    border-radius: var(--radius);
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* ---------- Crispy Forms Bootstrap5 overrides ---------- */
.form-floating > .form-control,
.form-floating > .form-select {
  background-color: var(--bg-secondary);
  border-color: var(--border);
  color: var(--text-primary);
}
.form-floating > label { color: var(--text-muted); }

.form-check-input {
  background-color: var(--bg-secondary);
  border-color: var(--border-light);
}
.form-check-input:checked {
  background-color: var(--accent);
  border-color: var(--accent);
}
.form-check-input:focus {
  box-shadow: 0 0 0 3px var(--accent-glow);
  border-color: var(--accent);
}
.form-check-label { color: var(--text-secondary); }

/* input-group */
.input-group-text {
  background-color: var(--bg-hover);
  border-color: var(--border);
  color: var(--text-muted);
}

/* form-text / helptext */
.form-text, .helptext {
  color: var(--text-muted);
  font-size: 0.8rem;
}
.form-text a { color: var(--accent); }

/* ---------- Bootstrap overrides for dark theme ---------- */
.text-body-secondary { color: var(--text-secondary) !important; }
.text-muted { color: var(--text-muted) !important; }
.bg-body-tertiary { background-color: var(--bg-secondary) !important; }
.bg-body { background-color: var(--bg-primary) !important; }
.border { border-color: var(--border) !important; }

/* ---------- Print ---------- */
@media print {
  .navbar, footer, #theme-toggle { display: none; }
  body { background: #fff; color: #000; }
}