/* ===========================
   Carte Etudiant — Admin UI
   Design System & Components
   =========================== */

/* --- Google Fonts --- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

/* --- Custom Properties --- */
:root {
  /* Campus Bon Secours palette — marron/cuivre */
  --bg: #061a28;
  --surface: rgba(255,255,255,0.04);
  --card: rgba(255,255,255,0.06);
  --card-hover: rgba(255,255,255,0.10);
  --accent: #b5866d;
  --accent-hover: #c19174;
  --accent-glow: rgba(181,134,109,0.25);
  --accent-subtle: rgba(181,134,109,0.12);
  --navy: #053d5b;
  --teal: #4691a8;
  --text: #f0f0f0;
  --text-muted: rgba(255,255,255,0.5);
  --text-dim: rgba(255,255,255,0.35);
  --border: rgba(255,255,255,0.08);
  --border-focus: rgba(181,134,109,0.6);
  --error: #ef4444;
  --error-bg: rgba(239,68,68,0.12);
  --error-border: rgba(239,68,68,0.25);
  --success: #22c55e;
  --success-bg: rgba(34,197,94,0.12);
  --success-border: rgba(34,197,94,0.25);
  --warning: #f59e0b;
  --blue: #4691a8;
  --blue-bg: rgba(70,145,168,0.12);
  --blue-border: rgba(70,145,168,0.25);
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  --shadow: 0 4px 24px rgba(0,0,0,0.3);
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.2);
  --transition: 0.2s ease;
}

/* --- Light Theme --- */
:root[data-theme="light"] {
  --bg: #f0ede8;
  --surface: rgba(0,0,0,0.03);
  --card: #ffffff;
  --card-hover: #f9f7f5;
  --accent: #a16e5c;
  --accent-hover: #b5866d;
  --accent-glow: rgba(161,110,92,0.15);
  --accent-subtle: rgba(161,110,92,0.08);
  --text: #1a1a1a;
  --text-muted: rgba(0,0,0,0.55);
  --text-dim: rgba(0,0,0,0.35);
  --border: rgba(0,0,0,0.10);
  --border-focus: rgba(161,110,92,0.5);
  --error: #dc2626;
  --error-bg: rgba(220,38,38,0.08);
  --error-border: rgba(220,38,38,0.2);
  --success: #16a34a;
  --success-bg: rgba(22,163,74,0.08);
  --success-border: rgba(22,163,74,0.2);
  --blue: #2563eb;
  --blue-bg: rgba(37,99,235,0.08);
  --blue-border: rgba(37,99,235,0.2);
  --shadow: 0 4px 24px rgba(0,0,0,0.08);
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
}

:root[data-theme="light"] .card,
:root[data-theme="light"] .student-card,
:root[data-theme="light"] .stat-card {
  border-color: rgba(0,0,0,0.08);
  box-shadow: var(--shadow-sm);
}

:root[data-theme="light"] .card--glass {
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-color: rgba(0,0,0,0.08);
}

:root[data-theme="light"] .btn--ghost {
  border-color: rgba(0,0,0,0.15);
  color: var(--text-muted);
}
:root[data-theme="light"] .btn--ghost:hover {
  background: rgba(0,0,0,0.04);
  border-color: rgba(0,0,0,0.25);
  color: var(--text);
}

:root[data-theme="light"] .btn--icon {
  background: rgba(0,0,0,0.04);
  border-color: rgba(0,0,0,0.1);
  color: var(--text-muted);
}
:root[data-theme="light"] .btn--icon:hover {
  background: rgba(0,0,0,0.08);
  color: var(--text);
}

:root[data-theme="light"] .btn--danger {
  background: rgba(220,38,38,0.08);
  color: #dc2626;
  border-color: rgba(220,38,38,0.2);
}

:root[data-theme="light"] .input {
  background: #fff;
  border-color: rgba(0,0,0,0.15);
  color: var(--text);
}

:root[data-theme="light"] .modal {
  background: #fff;
  border-color: rgba(0,0,0,0.1);
}

:root[data-theme="light"] .badge {
  background: var(--accent-subtle);
  color: var(--accent);
}

:root[data-theme="light"] .avatar--placeholder {
  background: rgba(0,0,0,0.06);
  color: var(--text-dim);
}

:root[data-theme="light"] .modal-overlay {
  background: rgba(0,0,0,0.3);
}

:root[data-theme="light"] [data-tooltip]::after {
  background: #333;
  color: #fff;
}

:root[data-theme="light"] .photo-upload {
  border-color: rgba(0,0,0,0.15);
  background: rgba(0,0,0,0.02);
}
:root[data-theme="light"] .photo-upload:hover,
:root[data-theme="light"] .photo-upload.dragover {
  border-color: var(--accent);
  background: var(--accent-subtle);
}

/* --- Theme Toggle --- */
.theme-toggle {
  position: fixed;
  bottom: 20px;
  right: 20px;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--card);
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
  z-index: 900;
  box-shadow: var(--shadow-sm);
}
.theme-toggle:hover {
  background: var(--card-hover);
  color: var(--text);
  transform: scale(1.08);
}
.theme-toggle svg { width: 20px; height: 20px; }
.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: block; }
:root[data-theme="light"] .theme-toggle .icon-sun { display: block; }
:root[data-theme="light"] .theme-toggle .icon-moon { display: none; }

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

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.5;
  font-size: 14px;
}

a {
  color: inherit;
  text-decoration: none;
}

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

/* --- Layout --- */
.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 32px 20px;
}

.container--narrow {
  max-width: 480px;
}

.container--wide {
  max-width: 1100px;
}

/* --- Typography --- */
.h1 { font-size: 24px; font-weight: 700; color: var(--text); }
.h2 { font-size: 20px; font-weight: 600; color: var(--text); }
.h3 { font-size: 16px; font-weight: 600; color: var(--text); }
.text-muted { color: var(--text-muted); }
.text-dim { color: var(--text-dim); }
.text-sm { font-size: 13px; }
.text-xs { font-size: 12px; }

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 16px;
  border: none;
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
  text-decoration: none;
  line-height: 1.4;
}

.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn--primary {
  background: var(--accent);
  color: #fff;
}
.btn--primary:hover { background: var(--accent-hover); }

.btn--ghost {
  background: transparent;
  color: var(--text-muted);
  border: 1px solid var(--border);
}
.btn--ghost:hover {
  color: var(--text);
  border-color: rgba(255,255,255,0.2);
  background: var(--surface);
}

.btn--danger {
  background: var(--error-bg);
  color: #f87171;
  border: 1px solid var(--error-border);
}
.btn--danger:hover {
  background: rgba(239,68,68,0.2);
}

.btn--blue {
  background: var(--blue-bg);
  color: #93bbfc;
  border: 1px solid var(--blue-border);
}
.btn--blue:hover { background: rgba(59,130,246,0.2); }

.btn--sm {
  padding: 6px 12px;
  font-size: 12px;
  border-radius: 6px;
}

.btn--lg {
  padding: 12px 24px;
  font-size: 15px;
  border-radius: var(--radius);
}

.btn--icon {
  padding: 7px;
  border-radius: var(--radius-sm);
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-muted);
}
.btn--icon:hover {
  background: var(--card-hover);
  color: var(--text);
}

.btn--icon svg { width: 16px; height: 16px; }

/* --- Inputs --- */
.input {
  width: 100%;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font-family: inherit;
  font-size: 14px;
  transition: all var(--transition);
  outline: none;
}

.input:focus {
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.input::placeholder {
  color: var(--text-dim);
}

.input--with-icon {
  padding-left: 40px;
}

.input-wrapper {
  position: relative;
}

.input-wrapper .input-icon {
  position: absolute;
  left: 12px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-dim);
  pointer-events: none;
}

.input-wrapper .input-icon svg {
  width: 18px;
  height: 18px;
}

/* Select */
select.input {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='rgba(255,255,255,0.4)' viewBox='0 0 16 16'%3E%3Cpath d='M4.5 6l3.5 4 3.5-4z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
}

/* Label */
.label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 6px;
}

.form-group {
  margin-bottom: 20px;
}

/* --- Cards --- */
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  transition: all var(--transition);
}

.card:hover {
  background: var(--card-hover);
}

.card--glass {
  background: rgba(255,255,255,0.04);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,0.08);
  box-shadow: var(--shadow);
}

/* --- Badge --- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 10px;
  font-size: 12px;
  font-weight: 600;
  border-radius: var(--radius-full);
  background: var(--accent-glow);
  color: var(--accent-hover);
}

.badge--muted {
  background: var(--surface);
  color: var(--text-muted);
}

/* --- Flash / Alert --- */
.flash {
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  margin-bottom: 20px;
  animation: slideDown 0.3s ease;
}

.flash--success {
  background: var(--success-bg);
  border: 1px solid var(--success-border);
  color: #86efac;
}

.flash--error {
  background: var(--error-bg);
  border: 1px solid var(--error-border);
  color: #fca5a5;
}

/* --- Avatar --- */
.avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--border);
  flex-shrink: 0;
}

.avatar--lg {
  width: 120px;
  height: 120px;
  border-width: 3px;
}

.avatar--placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--surface);
  color: var(--text-dim);
  font-size: 16px;
  font-weight: 600;
}

/* --- Modal --- */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(4px);
  z-index: 1000;
  align-items: center;
  justify-content: center;
}

.modal-overlay.active {
  display: flex;
}

.modal {
  background: #1a1a2e;
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius-lg);
  padding: 32px;
  max-width: 420px;
  width: 90%;
  text-align: center;
  animation: fadeScale 0.2s ease;
}

.modal h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}

.modal p {
  color: var(--text-muted);
  font-size: 14px;
  margin-bottom: 24px;
}

.modal .modal-actions {
  display: flex;
  gap: 10px;
  justify-content: center;
}

/* --- Tooltip --- */
[data-tooltip] {
  position: relative;
}

[data-tooltip]::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%) scale(0.95);
  background: #2a2a40;
  color: var(--text);
  font-size: 11px;
  font-weight: 500;
  padding: 5px 10px;
  border-radius: 6px;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: all 0.15s ease;
  z-index: 100;
}

[data-tooltip]:hover::after {
  opacity: 1;
  transform: translateX(-50%) scale(1);
}

/* --- Empty State --- */
.empty-state {
  text-align: center;
  padding: 60px 20px;
}

.empty-state svg {
  width: 48px;
  height: 48px;
  color: var(--text-dim);
  margin-bottom: 16px;
}

.empty-state p {
  color: var(--text-dim);
  font-size: 15px;
  margin-bottom: 20px;
}

/* --- Breadcrumb --- */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  margin-bottom: 24px;
}

.breadcrumb a {
  color: var(--text-muted);
  transition: color var(--transition);
}

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

.breadcrumb .sep {
  color: var(--text-dim);
}

.breadcrumb .current {
  color: var(--text);
  font-weight: 500;
}

/* --- Grid --- */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

/* --- Animations --- */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeScale {
  from { opacity: 0; transform: scale(0.95); }
  to { opacity: 1; transform: scale(1); }
}

.anim-fade { animation: fadeIn 0.4s ease; }
.anim-slide-up { animation: slideUp 0.4s ease; }

/* --- Photo Upload Zone --- */
.photo-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 24px;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition);
}

.photo-zone:hover,
.photo-zone.dragover {
  border-color: var(--accent);
  background: var(--accent-glow);
}

.photo-zone input[type="file"] {
  display: none;
}

.photo-zone p {
  color: var(--text-muted);
  font-size: 13px;
  margin-top: 8px;
}

/* --- Scrollbar --- */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.2); }

/* --- Responsive --- */

/* iPad & tablets (portrait + landscape) */
@media (max-width: 1100px) {
  .container--wide { max-width: 100%; }
}

@media (max-width: 1024px) {
  .container { padding: 24px 20px; }
  /* Touch-friendly: min 44px tap targets (Apple HIG) */
  .btn { min-height: 44px; padding: 10px 18px; font-size: 14px; }
  .btn--sm { min-height: 38px; padding: 8px 14px; font-size: 13px; }
  .btn--lg { min-height: 48px; padding: 14px 28px; font-size: 16px; }
  .btn--icon { min-width: 44px; min-height: 44px; padding: 10px; }
  .btn--icon svg { width: 20px; height: 20px; }
  .input { min-height: 44px; padding: 12px 16px; font-size: 15px; }
  .avatar { width: 48px; height: 48px; }
  /* Disable hover effects on touch */
  .card:hover { background: var(--card); }
  .student-card:hover { background: var(--card); border-color: var(--border); }
  [data-tooltip]::after { display: none; }
}

@media (max-width: 768px) {
  .container { padding: 20px 16px; }
  .grid-2 { grid-template-columns: 1fr; }
  .h1 { font-size: 20px; }
}

@media (max-width: 640px) {
  body { font-size: 13px; }
  .btn { padding: 8px 14px; font-size: 13px; }
  .btn--lg { padding: 10px 20px; font-size: 14px; }
  .input { padding: 10px 12px; }
}