/* =====================================================================
   MIT EDUCATION — Global Stylesheet
   ===================================================================== */

:root {
  --primary: #1c4e9c;
  --primary-dark: #123a76;
  --accent: #f0a500;
  --bg: #f4f6fa;
  --card-bg: #ffffff;
  --text: #1f2937;
  --muted: #6b7280;
  --border: #e2e6ee;
  --success: #16a34a;
  --danger: #dc2626;
  --warning: #d97706;
  --radius: 10px;
  --shadow: 0 2px 10px rgba(20, 30, 60, 0.07);
  --sidebar-w: 250px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
}

a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

img { max-width: 100%; }

button, input, select, textarea { font-family: inherit; font-size: 14px; }

/* ---------- Top Nav (public site) ---------- */
.topnav {
  background: var(--primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 24px;
  box-shadow: var(--shadow);
}
.topnav .brand { font-size: 20px; font-weight: 700; color: #fff; }
.topnav .brand span { color: var(--accent); }
.topnav .nav-links a { color: #fff; margin-left: 20px; font-weight: 500; }

/* ---------- Hero / index page ---------- */
.hero {
  min-height: 70vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 60px 20px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #fff;
}
.hero h1 { font-size: 2.4rem; margin-bottom: 10px; }
.hero p { font-size: 1.05rem; opacity: .9; max-width: 560px; margin: 0 auto 28px; }
.btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: var(--radius);
  border: none;
  cursor: pointer;
  font-weight: 600;
  font-size: 15px;
  transition: transform .15s ease, box-shadow .15s ease;
}
.btn-accent { background: var(--accent); color: #1f2937; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-outline { background: transparent; border: 2px solid #fff; color: #fff; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-success { background: var(--success); color: #fff; }
.btn-sm { padding: 6px 14px; font-size: 13px; border-radius: 6px; }
.btn:hover { transform: translateY(-1px); box-shadow: 0 4px 12px rgba(0,0,0,.15); text-decoration:none; }
.btn:disabled { opacity: .5; cursor: not-allowed; transform:none; box-shadow:none; }

.features { max-width: 1000px; margin: 0 auto; padding: 50px 20px; display: grid; grid-template-columns: repeat(auto-fit,minmax(220px,1fr)); gap: 20px; }
.feature-card { background: var(--card-bg); border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow); text-align:center; }
.feature-card .icon { font-size: 32px; margin-bottom: 10px; }

.site-footer { text-align:center; padding: 24px; color: var(--muted); font-size: 13px; }

/* ---------- Auth / Login pages ---------- */
.auth-wrap {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  padding: 20px;
}
.auth-card {
  background: var(--card-bg);
  width: 100%;
  max-width: 420px;
  border-radius: 14px;
  box-shadow: 0 10px 40px rgba(0,0,0,.25);
  padding: 30px 28px;
}
.auth-card h2 { margin-top: 0; text-align:center; color: var(--primary-dark); }
.auth-card .sub { text-align:center; color: var(--muted); margin-bottom: 20px; font-size: 13px; }
.auth-tabs { display:flex; border-radius: 8px; overflow:hidden; margin-bottom: 22px; border: 1px solid var(--border); }
.auth-tabs a { flex:1; text-align:center; padding: 10px 0; background:#f0f2f7; color: var(--text); font-weight:600; font-size:14px; }
.auth-tabs a.active { background: var(--primary); color:#fff; }
.form-group { margin-bottom: 16px; }
.form-group label { display:block; margin-bottom: 6px; font-weight: 600; font-size: 13px; color:var(--text); }
.form-group input, .form-group select, .form-group textarea {
  width: 100%; padding: 10px 12px; border: 1px solid var(--border); border-radius: 8px; background:#fbfcfe;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { outline: none; border-color: var(--primary); background:#fff; }
.form-row { display:flex; gap: 12px; flex-wrap: wrap; }
.form-row .form-group { flex: 1 1 200px; min-width: 0; }
.auth-links { display:flex; justify-content: space-between; font-size: 13px; margin-top: 10px; flex-wrap:wrap; gap:6px; }
.full-btn { width: 100%; padding: 12px; margin-top: 6px; }

/* ---------- Flash messages ---------- */
.flash { padding: 12px 16px; border-radius: 8px; margin-bottom: 16px; font-size: 14px; }
.flash-success { background: #e9f9ee; color: var(--success); border: 1px solid #b7ecc7; }
.flash-error { background: #fdecec; color: var(--danger); border: 1px solid #f6c1c1; }
.flash-info { background: #eaf2ff; color: var(--primary-dark); border: 1px solid #c6d9fb; }

/* ---------- Dashboard shell (admin & institute) ---------- */
.app-shell { display:flex; min-height: 100vh; }
.sidebar {
  width: var(--sidebar-w);
  background: var(--primary-dark);
  color: #fff;
  flex-shrink: 0;
  transition: margin-left .25s ease;
  overflow-y: auto;
}
.sidebar.collapsed { margin-left: calc(-1 * var(--sidebar-w)); }
.sidebar .side-header { padding: 18px 20px; font-weight: 700; font-size: 18px; border-bottom: 1px solid rgba(255,255,255,.1); white-space: nowrap; }
.sidebar .side-header span { color: var(--accent); }
.sidebar nav a {
  display: flex; align-items: center; gap: 10px;
  padding: 12px 20px; color: #dbe4f5; font-size: 14px; white-space: nowrap;
  border-left: 3px solid transparent;
}
.sidebar nav a:hover, .sidebar nav a.active { background: rgba(255,255,255,.08); color:#fff; border-left-color: var(--accent); text-decoration:none; }
.sidebar nav a .ico { width: 18px; text-align:center; }

.main-area { flex: 1; min-width: 0; }
.topbar {
  background:#fff; border-bottom: 1px solid var(--border);
  padding: 12px 20px; display:flex; align-items:center; justify-content: space-between;
  position: sticky; top:0; z-index: 20;
}
.topbar .left { display:flex; align-items:center; gap: 14px; }
.hamburger { background:none; border:1px solid var(--border); border-radius:6px; width:38px;height:38px; cursor:pointer; font-size:18px; }
.topbar .page-title { font-weight:700; font-size: 16px; white-space:nowrap; }
.topbar .right { display:flex; align-items:center; gap:14px; }
.topbar .user-chip { background: var(--bg); padding: 6px 14px; border-radius: 20px; font-size:13px; font-weight:600; white-space:nowrap; }

.content { padding: 20px; max-width: 100%; overflow-x: hidden; }
@media (max-width: 640px) { .content { padding: 14px; } }

.card { background: var(--card-bg); border-radius: var(--radius); box-shadow: var(--shadow); padding: 20px; margin-bottom: 20px; }
.card h3 { margin-top:0; }

.stat-grid { display:grid; grid-template-columns: repeat(auto-fit,minmax(200px,1fr)); gap:16px; margin-bottom: 20px; }
.stat-card { background:#fff; border-radius: var(--radius); box-shadow: var(--shadow); padding: 18px; border-left: 4px solid var(--primary); }
.stat-card .num { font-size: 28px; font-weight: 700; color: var(--primary-dark); }
.stat-card .label { color: var(--muted); font-size: 13px; margin-top: 4px; white-space: nowrap; }

table.data-table { width: 100%; border-collapse: collapse; font-size: 13px; }
table.data-table th, table.data-table td {
  padding: 10px 12px; border-bottom: 1px solid var(--border); text-align:left; white-space: nowrap;
}
table.data-table th { background: #f0f3f9; font-weight: 700; color: var(--primary-dark); position: sticky; top:0; }
table.data-table tr:hover { background: #f8fafc; }
.table-wrap { overflow-x: auto; }

.badge { display:inline-block; padding: 3px 10px; border-radius: 20px; font-size:12px; font-weight:700; white-space:nowrap; }
.badge-success { background:#e9f9ee; color:var(--success); }
.badge-danger { background:#fdecec; color:var(--danger); }
.badge-warning { background:#fff6e5; color:var(--warning); }
.badge-muted { background:#eef1f6; color: var(--muted); }

.toolbar { display:flex; gap:10px; flex-wrap:wrap; align-items:center; margin-bottom: 16px; }
.toolbar input, .toolbar select { padding: 8px 10px; border:1px solid var(--border); border-radius:8px; }

/* ---------- Modal ---------- */
.modal-overlay {
  position: fixed; inset:0; background: rgba(15,23,42,.55);
  display:flex; align-items:center; justify-content:center; z-index: 100; padding: 20px;
}
.modal-box { background:#fff; border-radius: 12px; max-width: 560px; width:100%; max-height: 90vh; overflow-y:auto; padding: 24px; }
.modal-box h3 { margin-top:0; }
.modal-close { float:right; background:none; border:none; font-size:20px; cursor:pointer; color:var(--muted); }

/* ---------- Banner overlay (institute) ---------- */
.banner-overlay {
  position: fixed; inset:0; background:#000; z-index: 999;
  display:flex; align-items:center; justify-content:center; flex-direction: column;
}
.banner-overlay img, .banner-overlay video { max-width:100%; max-height: 85vh; }
.banner-close { position:absolute; top:20px; right:24px; background:rgba(255,255,255,.15); color:#fff; border:none; width:40px;height:40px;border-radius:50%; font-size:20px; cursor:pointer; }
.banner-progress-wrap { width: 100%; height: 5px; background: rgba(255,255,255,.2); position:absolute; bottom:0; left:0; }
.banner-progress-bar { height: 100%; background: var(--accent); width:100%; }

/* ---------- Responsive ---------- */
@media (max-width: 640px) {
  .sidebar { position: fixed; inset:0 auto 0 0; z-index: 50; margin-left: calc(-1 * var(--sidebar-w)); }
  .sidebar.mobile-open { margin-left: 0; box-shadow: 0 0 30px rgba(0,0,0,.3); }
  .hero h1 { font-size: 1.7rem; }
  .auth-card { padding: 22px 18px; }
  .topbar .page-title { display:none; }
}
/* Invalid field highlight */
#enquiryForm input.invalid,
#enquiryForm textarea.invalid {
    border-color: #dc2626 !important;
    box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.15) !important;
    background-color: #fff5f5;
}

/* Inline error message under field */
#enquiryForm .field-error {
    display: none;
    color: #dc2626;
    font-size: 0.8rem;
    margin-top: 4px;
    font-weight: 500;
}

#enquiryForm .field-error.show {
    display: block;
}
/* ---------- Pagination ---------- */
.pg-nav {
  display: flex;
  gap: 6px;
  justify-content: center;
  align-items: center;
  margin-top: 20px;
  flex-wrap: wrap;
}
.pg-nav .pg-btn {
  padding: 6px 12px;
  border-radius: 6px;
  font-size: 13px;
  text-decoration: none;
  border: 1px solid var(--border);
  background: #fff;
  color: #0f172a;
  min-width: 36px;
  text-align: center;
  display: inline-block;
  transition: all .15s;
}
.pg-nav a.pg-btn:hover {
  background: #f1f5f9;
  border-color: #94a3b8;
  text-decoration: none;
}
.pg-nav .pg-btn.current {
  background: linear-gradient(135deg, #1e3a8a, #3b82f6);
  color: #fff;
  border-color: #1e3a8a;
  font-weight: 700;
  cursor: default;
}
.pg-nav .pg-btn.disabled {
  opacity: .4;
  cursor: not-allowed;
}
.pg-nav .pg-dots {
  padding: 6px 4px;
  color: var(--muted);
  font-size: 13px;
}
.pg-info {
  text-align: center;
  color: var(--muted);
  font-size: 12.5px;
  margin-top: 10px;
  padding-bottom: 4px;
}