/* ============================================================
   BTSP — admin panel + student area
   Same design system as the public site: institutional editorial,
   sharp geometry, hairline rules, BADAR blue + red.
   ============================================================ */

:root {
  --blue-900: #0A1547;
  --blue-800: #101F63;
  --blue-700: #16299B;
  --blue-600: #1E3FD0;
  --blue-500: #3D63F0;
  --blue-100: #E7EDFF;

  --red-600: #C51D35;
  --red-500: #E23744;
  --red-400: #F2596B;
  --red-300: #FF7A85;
  --red-100: #FFE9EB;

  --amber-500: #F2A93B;

  --canvas: #FBFAF7;
  --surface: #FFFFFF;
  --surface-2: #F4F1EB;
  --surface-3: #EDE8E0;
  --mist: var(--surface-2);
  --mist-dark: var(--surface-3);
  --white: #FFFFFF;

  --ink: #14161F;
  --ink-soft: #4C5162;
  --ink-muted: #8A8FA1;

  --success: #157F4B;
  --success-light: #E3F5EC;
  --warning: #A96A0B;
  --warning-light: #FDF0DA;
  --danger: #C41F35;
  --danger-light: #FDE8EB;
  --info: var(--blue-600);
  --info-light: var(--blue-100);

  /* Legacy aliases the per-page student stylesheets still reference */
  --primary: var(--blue-600);
  --primary-dark: var(--blue-900);
  --primary-light: var(--blue-500);
  --gold: var(--red-500);
  --gold-light: var(--red-400);
  --accent: var(--red-500);
  --cream: var(--surface-2);
  --dark: var(--blue-900);
  --text: var(--ink-soft);
  --text-light: var(--ink-soft);
  --text-muted: var(--ink-muted);
  --border: #E7E1D8;
  --bg: var(--canvas);

  --radius: 16px;
  --radius-sm: 12px;
  --shadow: 0 2px 6px rgba(20, 22, 31, 0.05);
  --shadow-md: 0 16px 40px rgba(20, 22, 31, 0.09);

  --sidebar-w: 268px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --transition: 0.28s var(--ease);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--mist);
  color: var(--ink-soft);
  min-height: 100vh;
  min-height: 100dvh;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
ul { list-style: none; }
button { font: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input, select, textarea { font: inherit; }

h1, h2, h3, h4 { font-family: 'Outfit', 'Plus Jakarta Sans', sans-serif; color: var(--ink); line-height: 1.15; font-weight: 700; letter-spacing: -0.02em; }

:focus-visible { outline: 2px solid var(--red-500); outline-offset: 2px; }

.text-sm { font-size: 0.85rem; }
.text-muted { color: var(--ink-muted); }
.mb-4 { margin-bottom: 24px; }
.mt-2 { margin-top: 8px; }
.mt-4 { margin-top: 24px; }
.flex { display: flex; }
.gap-2 { gap: 8px; }
.items-center { align-items: center; }

/* ---------- Admin sidebar ---------- */

.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-w);
  height: 100vh;
  /* iOS reports 100vh taller than the visible area while the toolbar is
     shown, which hid the sidebar footer behind it. */
  height: 100dvh;
  background: var(--blue-900);
  color: var(--white);
  display: flex;
  flex-direction: column;
  z-index: 100;
}

.sidebar-brand {
  padding: 26px 22px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 1.06rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--white);
}
.sidebar-brand em {
  display: block;
  font-style: normal;
  font-size: 0.63rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  color: var(--red-300);
  margin-top: 5px;
}

.sidebar-nav { flex: 1; padding: 14px 0; overflow-y: auto; }

.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: 13px;
  padding: 11px 22px;
  font-size: 0.83rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.6);
  border-left: 3px solid transparent;
  transition: all var(--transition);
}

.sidebar-nav a:hover { background: rgba(255, 255, 255, 0.05); color: var(--white); }

.sidebar-nav a.active {
  background: rgba(255, 255, 255, 0.07);
  border-left-color: var(--red-500);
  color: var(--white);
  font-weight: 600;
}

.sidebar-nav svg { width: 17px; height: 17px; flex-shrink: 0; }

.sidebar-nav .nav-label {
  font-size: 0.62rem;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: rgba(255, 255, 255, 0.32);
  padding: 20px 22px 8px;
  font-weight: 700;
}

.sidebar-footer { padding: 16px 22px; border-top: 1px solid rgba(255, 255, 255, 0.1); }
.sidebar-footer a {
  display: block;
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.55);
  transition: color var(--transition);
}
.sidebar-footer a:hover { color: var(--red-300); }
.sidebar-footer form { margin: 0; }
.sidebar-footer button {
  display: block;
  width: 100%;
  padding: 0;
  background: none;
  border: 0;
  text-align: inherit;
  font: inherit;
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.55);
  cursor: pointer;
  transition: color var(--transition);
}
.sidebar-footer button:hover { color: var(--red-300); }

/* ---------- Admin shell ---------- */

.main { margin-left: var(--sidebar-w); min-height: 100vh; min-height: 100dvh; }

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 0 34px;
  height: 74px;
  background: var(--white);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 50;
}

.topbar h1 { font-size: 1.24rem; font-weight: 600; }
.topbar-actions { display: flex; align-items: center; gap: 10px; }

.content { padding: 34px; }

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 999px;
  font-family: 'Outfit', sans-serif;
  font-size: 0.86rem;
  font-weight: 600;
  letter-spacing: 0;
  text-transform: none;
  background: var(--white);
  color: var(--ink);
  border: 1px solid var(--border);
  transition: all var(--transition);
}

.btn:hover { border-color: var(--blue-800); color: var(--blue-900); }
.btn:active { transform: translateY(1px); }

.btn-primary { background: linear-gradient(115deg, var(--blue-600), var(--blue-700)); border-color: transparent; color: var(--white); box-shadow: 0 10px 26px rgba(30,63,208,0.24); }
.btn-primary:hover { background: var(--blue-600); border-color: var(--blue-600); color: var(--white); }

.btn-accent,
.btn-gold { background: linear-gradient(115deg, var(--red-500), var(--red-600)); border-color: transparent; color: var(--white); box-shadow: 0 10px 26px rgba(226,55,68,0.26); }
.btn-accent:hover,
.btn-gold:hover { background: var(--red-600); border-color: var(--red-600); color: var(--white); }

.btn-success { background: var(--success); border-color: var(--success); color: var(--white); }
.btn-success:hover { background: #166534; border-color: #166534; color: var(--white); }

.btn-danger { background: var(--danger); border-color: var(--danger); color: var(--white); }
.btn-danger:hover { background: #991B1B; border-color: #991B1B; color: var(--white); }

.btn-sm { padding: 8px 15px; font-size: 0.68rem; }
.btn-block { width: 100%; }

.btn-icon {
  padding: 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

/* ---------- Cards ---------- */

.card {
  background: var(--white);
  border: 1px solid #EFEAE2;
  border-radius: 20px;
  margin-bottom: 24px;
}

.card-header {
  padding: 20px 26px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-weight: 600;
  color: var(--ink);
}

.card-body { padding: 26px; }

.page-header { margin-bottom: 30px; }
.page-header h1 { font-size: 1.6rem; margin-bottom: 6px; }
.page-header p { color: var(--ink-muted); font-size: 0.92rem; }

.section-title {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--red-500);
  padding-top: 14px;
  border-top: 3px solid var(--red-500);
  width: fit-content;
  margin-bottom: 18px;
}

/* ---------- Stats ---------- */

.stats-grid,
.stats-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0;
  margin-bottom: 30px;
  border-top: 1px solid var(--border);
  border-left: 1px solid var(--border);
}

.stat-card {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 24px 26px;
  background: var(--white);
  border-right: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.stat-card .stat-icon {
  width: 50px;
  height: 50px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  background: linear-gradient(135deg, var(--blue-600), var(--blue-700));
  color: var(--white);
}

.stat-icon svg { width: 20px; height: 20px; }

.stat-icon-primary { background: var(--blue-800); }
.stat-icon-gold { background: var(--red-500); }
.stat-icon-success { background: var(--success); }
.stat-icon-info { background: var(--blue-500); }

.stat-card .stat-value { font-size: 1.7rem; font-weight: 700; color: var(--ink); line-height: 1.1; }
.stat-card .stat-label {
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-muted);
  margin-top: 3px;
}
.stat-info { min-width: 0; }

/* ---------- Tables ---------- */

.table-wrap { overflow-x: auto; }

table { width: 100%; border-collapse: collapse; font-size: 0.88rem; }

th {
  text-align: left;
  padding: 13px 16px;
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-muted);
  background: var(--mist);
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

td { padding: 15px 16px; border-bottom: 1px solid var(--border); color: var(--ink-soft); vertical-align: middle; }

tr:hover td { background: var(--mist); }

.thumb { width: 54px; height: 40px; object-fit: cover; border-radius: var(--radius-sm); }

.thumb-placeholder {
  width: 54px;
  height: 40px;
  background: var(--mist-dark);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--ink-muted);
  font-size: 0.7rem;
}

/* ---------- Badges ---------- */

.badge {
  display: inline-block;
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: none;
  background: var(--mist-dark);
  color: var(--ink-soft);
  white-space: nowrap;
}

.badge-success { background: var(--success-light); color: var(--success); }
.badge-warning { background: var(--warning-light); color: var(--warning); }
.badge-danger { background: var(--danger-light); color: var(--danger); }
.badge-info { background: var(--info-light); color: var(--blue-700); }
.badge-muted { background: var(--mist-dark); color: var(--ink-muted); }

.badge-culinary { background: var(--red-100); color: var(--red-600); }
.badge-hospitality { background: var(--info-light); color: var(--blue-700); }
.badge-it { background: #EDE9FE; color: #5B21B6; }
.badge-default { background: var(--mist-dark); color: var(--ink-soft); }

/* ---------- Flash messages ---------- */

.flash {
  padding: 14px 20px;
  border-radius: var(--radius-sm);
  margin-bottom: 20px;
  font-size: 0.89rem;
  border-left: 4px solid var(--ink-muted);
  background: var(--mist);
  color: var(--ink-soft);
}

.flash-success { background: var(--success-light); border-left-color: var(--success); color: var(--success); }
.flash-error { background: var(--danger-light); border-left-color: var(--danger); color: var(--danger); }
.flash-warning { background: var(--warning-light); border-left-color: var(--warning); color: var(--warning); }
.flash-info { background: var(--info-light); border-left-color: var(--blue-600); color: var(--blue-700); }

/* ---------- Forms ---------- */

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

.form-group label {
  display: block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink);
  margin-bottom: 8px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--white);
  color: var(--ink);
  font-size: 0.92rem;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--red-500);
  box-shadow: 0 0 0 3px rgba(200, 16, 46, 0.12);
}

.form-group textarea { resize: vertical; min-height: 96px; }

.form-group .help { font-size: 0.78rem; color: var(--ink-muted); margin-top: 6px; }

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }

.form-check {
  display: flex;
  align-items: center;
  gap: 9px;
  font-size: 0.89rem;
  color: var(--ink-soft);
  cursor: pointer;
}
.form-check input { width: auto; accent-color: var(--red-500); }

/* ---------- Student navbar ---------- */

.navbar {
  display: flex;
  align-items: center;
  gap: 26px;
  padding: 0 32px;
  height: 72px;
  background: var(--white);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-brand {
  font-size: 1.14rem;
  font-weight: 700;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--blue-900);
  flex-shrink: 0;
}
.nav-brand em { font-style: normal; color: var(--red-500); }

.nav-links { display: flex; align-items: center; gap: 2px; flex: 1; }

.nav-links a {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 25px 16px;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
  border-bottom: 3px solid transparent;
  transition: all var(--transition);
}

.nav-links a svg { width: 16px; height: 16px; }
.nav-links a:hover { color: var(--blue-900); }
.nav-links a.active { color: var(--blue-900); border-bottom-color: var(--red-500); }

.nav-right { display: flex; align-items: center; gap: 16px; flex-shrink: 0; }

.nav-user { display: flex; align-items: center; gap: 10px; }

.nav-avatar {
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--blue-900);
  color: var(--white);
  font-weight: 700;
  font-size: 0.92rem;
  flex-shrink: 0;
}

.nav-user span.nav-user-name { font-size: 0.88rem; font-weight: 600; color: var(--ink); }

.nav-logout {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-muted);
  padding: 9px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}
.nav-logout:hover { border-color: var(--red-500); color: var(--red-500); }
/* Signing out is a POST now — a GET was the one cross-site request SameSite=Lax
   still allowed. The control is a button in a form; these keep it looking and
   sitting exactly where the link did. */
.nav-logout-form { display: inline-flex; margin: 0; }
button.nav-logout { background: none; cursor: pointer; font-family: inherit; line-height: 1; }

.nav-toggle { display: none; flex-direction: column; gap: 5px; padding: 8px; }
.nav-toggle span { width: 22px; height: 2px; background: var(--blue-900); }

/* The student area uses .main as the page body, not an offset shell. */
.navbar ~ .main { margin-left: 0; padding: 34px 32px 64px; max-width: 1240px; }

/* ---------- Progress ---------- */

.progress-bar { height: 6px; background: var(--mist-dark); border-radius: 0; overflow: hidden; }
.progress-fill { height: 100%; background: var(--red-500); transition: width 0.4s var(--ease); }

/* ---------- Auth screens (admin + student) ---------- */

body:has(.login-card),
body:has(.signup-card) {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px 20px;
  background: var(--blue-900);
}

.login-card,
.signup-card {
  width: 100%;
  max-width: 440px;
  background: var(--white);
  border-top: 5px solid transparent;
  border-image: linear-gradient(90deg, var(--blue-600), var(--red-500)) 1;
  border-radius: 26px;
  padding: 44px 40px;
  box-shadow: 0 30px 70px rgba(0, 0, 0, 0.3);
}

.signup-card { max-width: 560px; }

.login-brand,
.signup-brand { text-align: center; margin-bottom: 32px; }

.login-brand h1,
.signup-brand h1 {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--blue-900);
  margin-bottom: 6px;
}

.login-brand em,
.signup-brand em { font-style: normal; color: var(--red-500); }

.login-brand p,
.signup-brand p { font-size: 0.85rem; color: var(--ink-muted); }

.btn-login,
.btn-signup {
  width: 100%;
  padding: 15px 24px;
  border: none;
  border-radius: var(--radius-sm);
  background: var(--red-500);
  color: var(--white);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background var(--transition);
}

.btn-login:hover,
.btn-signup:hover { background: var(--red-600); }

.links,
.back-link { margin-top: 26px; text-align: center; font-size: 0.85rem; color: var(--ink-muted); }

.links a,
.back-link a { color: var(--blue-700); font-weight: 600; transition: color var(--transition); }
.links a:hover,
.back-link a:hover { color: var(--red-500); }

.links .signup-link,
.links .login-link { color: var(--red-500); font-weight: 700; }
.links .signup-link:hover,
.links .login-link:hover { color: var(--red-600); }

/* ---------- Responsive ---------- */

@media (max-width: 1024px) {
  .sidebar { transform: translateX(-100%); transition: transform 0.3s var(--ease); }
  .sidebar.open { transform: translateX(0); }
  .main { margin-left: 0; }
  .content { padding: 24px 20px; }
  .topbar { padding: 0 20px; }
}

@media (max-width: 860px) {
  .nav-toggle { display: flex; order: 3; }

  .navbar { flex-wrap: wrap; height: auto; padding: 14px 20px; }

  .nav-links {
    display: none;
    order: 4;
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 14px 4px; border-bottom: 1px solid var(--border); }
  .nav-links a.active { border-bottom-color: var(--red-500); }

  .nav-right { margin-left: auto; }
  .navbar ~ .main { padding: 24px 20px 56px; }
}

@media (max-width: 680px) {
  .form-row { grid-template-columns: 1fr; gap: 0; }
  .card-body, .card-header { padding: 20px; }
  .login-card, .signup-card { padding: 32px 24px; }
  .topbar { flex-wrap: wrap; height: auto; padding: 16px 20px; gap: 12px; }
  .nav-user span.nav-user-name { display: none; }

  /* The month/year/class/status filters sat on one unwrapped row about 670px
     wide, which made the whole back-office scroll sideways on a phone. Let
     them wrap and share the width instead. Tables keep their own horizontal
     scroll — that is deliberate and stays inside .table-wrap. */
  /* Login/signup footer links were 17px tall — too small to hit reliably. */
  .links a { display: inline-block; padding: 10px 4px; }

  /* Row actions (Reçu, Annuler, Payé) and page actions were ~29px. Staff mark
     payments from a phone, so give the small buttons a thumb-sized target. */
  .btn-sm { padding: 12px 16px; font-size: 0.74rem; }
  td form.flex { gap: 8px; }

  .card-header { flex-wrap: wrap; align-items: flex-start; }
  .card-header > form { flex-wrap: wrap; width: 100%; gap: 8px; }
  .card-header > form select,
  .card-header > form input[type="number"] {
    flex: 1 1 132px; width: auto; min-width: 0;
  }
  .card-header > form .btn { flex: 1 1 100%; }

  /* Same story for the action bars above a page's card. */
  .page-actions, .actions { flex-wrap: wrap; }
}

/* Payment row actions: receipt link sits beside the toggle */
td form.flex { flex-wrap: wrap; }

/* ---------- Notched phones ---------- */
.topbar, .content { padding-left: max(20px, env(safe-area-inset-left)); padding-right: max(20px, env(safe-area-inset-right)); }
.sidebar { padding-bottom: env(safe-area-inset-bottom); }
@media (min-width: 861px) {
  .topbar { padding-left: max(34px, env(safe-area-inset-left)); padding-right: max(34px, env(safe-area-inset-right)); }
  .content { padding-left: max(34px, env(safe-area-inset-left)); padding-right: max(34px, env(safe-area-inset-right)); }
}

@media (max-width: 900px) {
  /* Safari zooms the page on any field under 16px and never zooms back. */
  input, select, textarea,
  .form-group input, .form-group select, .form-group textarea { font-size: 16px; }
}