/* ============================================================
   Codeyukthi LMS – Material Design Stylesheet
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Roboto:wght@300;400;500;700&display=swap');

:root {
  /* ── Material Design 3 Colour Tokens ─────────────────────── */
  --primary:        #3f51b5;   /* Indigo 500          */
  --primary-dark:   #303f9f;   /* Indigo 700          */
  --primary-light:  #e8eaf6;   /* Indigo 50           */
  --primary-mid:    #9fa8da;   /* Indigo 200          */
  --success:        #2e7d32;
  --success-light:  #e8f5e9;
  --warning:        #e65100;
  --warning-light:  #fff3e0;
  --danger:         #c62828;
  --danger-light:   #ffebee;
  --secondary:      #78909c;
  --dark:           #1a237e;
  --surface:        #ffffff;
  --bg:             #f0f2f8;
  --on-surface:     #1c1b1f;
  --outline:        #c5c5d0;
  --light:          #ecf0f1;

  /* ── Layout ──────────────────────────────────────────────── */
  --sidebar-w:  240px;
  --topbar-h:   56px;

  /* ── Shape ───────────────────────────────────────────────── */
  --radius-sm:  4px;
  --radius:     8px;
  --radius-md:  12px;
  --radius-lg:  16px;
  --radius-pill:20px;

  /* ── Elevation / Shadows ─────────────────────────────────── */
  --dp0:  none;
  --dp1:  0 1px 3px rgba(0,0,0,.12), 0 1px 2px rgba(0,0,0,.24);
  --dp2:  0 3px 6px rgba(0,0,0,.15), 0 2px 4px rgba(0,0,0,.12);
  --dp3:  0 6px 16px rgba(0,0,0,.12), 0 2px 6px rgba(0,0,0,.08);
  --dp4:  0 10px 28px rgba(0,0,0,.14), 0 4px 10px rgba(0,0,0,.08);
  --dp8:  0 20px 60px rgba(0,0,0,.2),  0 6px 20px rgba(0,0,0,.1);
  --shadow: var(--dp1);

  /* ── Motion ──────────────────────────────────────────────── */
  --transition: .2s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ── Reset ────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: 'Roboto', 'Segoe UI', Arial, sans-serif;
  font-size: 14px;
  color: var(--on-surface);
  background: var(--bg);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── Topbar ──────────────────────────────────────────────── */
.topbar {
  position: fixed; top: 0; left: 0; right: 0; height: var(--topbar-h);
  background: var(--primary-dark);
  color: #fff; display: flex; align-items: center; padding: 0 16px;
  z-index: 1000; gap: 12px;
  box-shadow: 0 2px 8px rgba(0,0,0,.3);
}
.topbar-brand {
  color: #fff; font-size: 18px; font-weight: 700;
  display: flex; align-items: center; gap: 8px; letter-spacing: .01em;
}
.topbar-brand:hover { text-decoration: none; }
.topbar-right { margin-left: auto; display: flex; align-items: center; gap: 16px; }
.topbar-school { font-size: 12px; color: rgba(255,255,255,.7); }
.sidebar-toggle {
  background: none; border: none; color: #fff; font-size: 18px;
  cursor: pointer; padding: 4px; border-radius: 50%;
  transition: background var(--transition);
}
.sidebar-toggle:hover { background: rgba(255,255,255,.12); }
.btn-user {
  background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.25);
  color: #fff; padding: 6px 14px; border-radius: var(--radius-pill); cursor: pointer;
  font-size: 13px; font-weight: 500; transition: background var(--transition);
}
.btn-user:hover { background: rgba(255,255,255,.2); }

/* Dropdown */
.dropdown { position: relative; }
.dropdown-menu {
  display: none; position: absolute; right: 0; top: 110%;
  background: var(--surface); border-radius: var(--radius-md);
  box-shadow: var(--dp4); min-width: 160px; z-index: 1001;
  overflow: hidden; border: 1px solid rgba(0,0,0,.06);
}
.dropdown:hover .dropdown-menu { display: block; }
.dropdown-menu a {
  display: flex; align-items: center; gap: 8px;
  padding: 11px 16px; color: #333; font-size: 13px;
  transition: background var(--transition);
}
.dropdown-menu a:hover { background: var(--primary-light); color: var(--primary); text-decoration: none; }

/* ── App container ───────────────────────────────────────── */
.app-container { display: flex; padding-top: var(--topbar-h); min-height: 100vh; }

/* ── Sidebar ─────────────────────────────────────────────── */
.sidebar {
  width: var(--sidebar-w); background: var(--dark); color: #fff;
  position: fixed; top: var(--topbar-h); left: 0; bottom: 0;
  overflow-y: auto; transition: transform var(--transition); z-index: 900;
  box-shadow: 2px 0 8px rgba(0,0,0,.15);
}
.sidebar.collapsed { transform: translateX(calc(-1 * var(--sidebar-w))); }
.sidebar-header { padding: 16px 18px; border-bottom: 1px solid rgba(255,255,255,.1); }
.role-badge {
  background: var(--primary); color: #fff; padding: 4px 10px;
  border-radius: var(--radius-pill); font-size: 11px; font-weight: 600;
  text-transform: uppercase; letter-spacing: .05em;
}
.sidebar-nav a.nav-item {
  display: flex; align-items: center; gap: 10px; color: rgba(255,255,255,.75);
  padding: 12px 20px; font-size: 13px; font-weight: 400;
  transition: all var(--transition); position: relative;
}
.sidebar-nav a.nav-item::before {
  content: ''; position: absolute; left: 0; top: 0; bottom: 0;
  width: 3px; background: var(--primary-mid); border-radius: 0 2px 2px 0;
  transform: scaleY(0); transition: transform var(--transition);
}
.sidebar-nav a.nav-item:hover,
.sidebar-nav a.nav-item.active {
  background: rgba(255,255,255,.1); color: #fff; text-decoration: none;
}
.sidebar-nav a.nav-item.active::before { transform: scaleY(1); }
.sidebar-nav a.nav-item i { width: 18px; text-align: center; opacity: .8; }
.sidebar-divider { border: none; border-top: 1px solid rgba(255,255,255,.1); margin: 8px 0; }
.text-danger { color: #ef9a9a !important; }

/* ── Main content ────────────────────────────────────────── */
.main-content {
  margin-left: var(--sidebar-w); flex: 1; padding: 24px;
  transition: margin var(--transition);
}

/* ── Page header ─────────────────────────────────────────── */
.page-header { margin-bottom: 24px; }
.page-header h1 { font-size: 22px; font-weight: 500; color: var(--dark); letter-spacing: -.01em; }
.page-header p  { color: #666; margin-top: 4px; font-size: 13px; }

/* ── Cards ───────────────────────────────────────────────── */
.card {
  background: var(--surface); border-radius: var(--radius-md);
  box-shadow: var(--dp1); margin-bottom: 24px;
  border: 1px solid rgba(0,0,0,.04);
}
.card-header {
  padding: 16px 20px; border-bottom: 1px solid rgba(0,0,0,.06);
  display: flex; align-items: center; justify-content: space-between;
}
.card-header h2, .card-header h3 {
  font-size: 15px; font-weight: 500; color: var(--dark); margin: 0;
}
.card-body { padding: 20px; }

/* ── Stats grid ──────────────────────────────────────────── */
.stats-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
  gap: 16px; margin-bottom: 24px;
}
.stat-card {
  background: var(--surface); border-radius: var(--radius-md); box-shadow: var(--dp1);
  padding: 18px; display: flex; align-items: center; gap: 16px;
  border: 1px solid rgba(0,0,0,.04);
}
.stat-card.clickable { cursor: pointer; transition: all var(--transition); }
.stat-card.clickable:hover { box-shadow: var(--dp3); transform: translateY(-2px); }
.stat-icon {
  width: 50px; height: 50px; border-radius: 14px; display: flex;
  align-items: center; justify-content: center; font-size: 22px;
  color: #fff; flex-shrink: 0; box-shadow: var(--dp1);
}
.stat-info h3 { font-size: 26px; font-weight: 700; color: var(--dark); letter-spacing: -.02em; }
.stat-info p  { font-size: 12px; color: #777; margin: 2px 0; font-weight: 500; }
.bg-blue   { background: var(--primary); }
.bg-green  { background: var(--success); }
.bg-orange { background: #f57c00; }
.bg-purple { background: #7b1fa2; }
.bg-teal   { background: #00796b; }
.bg-gold   { background: #f9a825; }
.bg-danger { background: var(--danger); }
.bg-success { background: var(--success); }
.bg-warning { background: var(--warning); }

/* ── Tables ──────────────────────────────────────────────── */
.table-responsive { overflow-x: auto; }
.table { width: 100%; border-collapse: collapse; font-size: 13px; }
.table th {
  background: var(--primary-light); color: var(--primary-dark);
  padding: 11px 14px; text-align: left; font-weight: 600;
  font-size: 11px; text-transform: uppercase; letter-spacing: .05em;
  border-bottom: 2px solid var(--primary-mid); white-space: nowrap;
}
.table td { padding: 11px 14px; border-bottom: 1px solid #f0f0f4; vertical-align: middle; }
.table-hover tbody tr { transition: background var(--transition); }
.table-hover tbody tr:hover { background: var(--primary-light); }

/* ── Badges ──────────────────────────────────────────────── */
.badge {
  display: inline-block; padding: 3px 10px; border-radius: var(--radius-pill);
  font-size: 11px; font-weight: 600; white-space: nowrap; letter-spacing: .02em;
}
.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: #e3f2fd; color: #1565c0; }
.badge-secondary { background: #eceff1; color: #546e7a; }
.badge-primary   { background: var(--primary-light); color: var(--primary-dark); }
.badge-gold      { background: #fff8e1; color: #f57f17; }

/* ── Progress bars ───────────────────────────────────────── */
.progress-bar-wrap {
  background: #e8eaf6; border-radius: 4px; height: 8px;
  overflow: hidden; margin: 4px 0;
}
.progress-fill { height: 100%; border-radius: 4px; transition: width .4s ease; }

/* ── Buttons — Material Design ───────────────────────────── */
.btn {
  position: relative; overflow: hidden;
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 9px 20px; border-radius: var(--radius-pill);
  border: none; cursor: pointer;
  font-size: 13px; font-weight: 600; letter-spacing: .025em;
  transition: all var(--transition); white-space: nowrap;
  text-decoration: none;
  -webkit-user-select: none; user-select: none;
}
/* Ripple layer */
.btn::after {
  content: ''; position: absolute; inset: 0; border-radius: inherit;
  background: rgba(255,255,255,0); transition: background var(--transition);
}
.btn:hover::after  { background: rgba(255,255,255,.14); }
.btn:active        { transform: scale(.96); }
.btn:hover         { text-decoration: none; }

/* Filled buttons */
.btn-primary {
  background: var(--primary); color: #fff; box-shadow: var(--dp1);
}
.btn-primary:hover   { background: var(--primary-dark); box-shadow: var(--dp2); color: #fff; }
.btn-success {
  background: var(--success); color: #fff; box-shadow: var(--dp1);
}
.btn-success:hover   { box-shadow: var(--dp2); }
.btn-warning {
  background: #f57c00; color: #fff; box-shadow: var(--dp1);
}
.btn-warning:hover   { background: #e65100; box-shadow: var(--dp2); }
.btn-danger  {
  background: var(--danger); color: #fff; box-shadow: var(--dp1);
}
.btn-danger:hover    { background: #b71c1c; box-shadow: var(--dp2); }
.btn-secondary {
  background: var(--secondary); color: #fff; box-shadow: var(--dp1);
}
.btn-info {
  background: #0277bd; color: #fff; box-shadow: var(--dp1);
}

/* Outlined / Tonal */
.btn-outline {
  background: transparent; color: var(--primary);
  border: 1.5px solid var(--primary); box-shadow: none;
}
.btn-outline:hover { background: var(--primary-light); }
.btn-outline::after { background: rgba(63,81,181,0); }
.btn-outline:hover::after { background: rgba(63,81,181,.05); }

/* Sizes */
.btn-sm  { padding: 5px 14px; font-size: 12px; border-radius: var(--radius-pill); gap: 4px; }
.btn-lg  { padding: 13px 28px; font-size: 15px; }
.btn-block { width: 100%; }
.btn-group { display: flex; gap: 6px; flex-wrap: wrap; }

/* SSO buttons */
.btn-sso {
  width: 100%; justify-content: center; margin-bottom: 8px;
  border: 1.5px solid var(--outline); background: var(--surface); color: #333;
  box-shadow: none; border-radius: var(--radius-pill);
}
.btn-sso:hover::after { background: rgba(0,0,0,.04); }
.btn-google:hover    { background: #fce4ec; border-color: #e57373; color: #c62828; }
.btn-microsoft:hover { background: #e3f2fd; border-color: #64b5f6; color: #1565c0; }

/* ── Forms — Material outlined style ────────────────────── */
.form-group {
  margin-bottom: 18px;
  position: relative;
}
.form-group label {
  display: block; font-weight: 500; margin-bottom: 5px;
  font-size: 11px; color: #666;
  text-transform: uppercase; letter-spacing: .06em;
}
.form-control {
  width: 100%; padding: 10px 14px;
  border: 1.5px solid var(--outline); border-radius: var(--radius);
  font-size: 14px; background: var(--surface); color: var(--on-surface);
  transition: border-color var(--transition), box-shadow var(--transition);
  font-family: inherit;
}
.form-control:focus {
  outline: none; border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(63,81,181,.14);
}
.form-control::placeholder { color: #aaa; }
.form-control-sm { padding: 6px 10px; font-size: 12px; }

/* Form layout grid */
.form-row     { display: flex; gap: 14px; flex-wrap: wrap; }
.col-2  { flex: 1 1 calc(16.66% - 12px); min-width: 80px; }
.col-3  { flex: 1 1 calc(25%   - 11px);  min-width: 100px; }
.col-4  { flex: 1 1 calc(33.33% - 10px); min-width: 110px; }
.col-5  { flex: 1 1 calc(41.66% - 9px);  min-width: 130px; }
.col-6  { flex: 1 1 calc(50%   - 7px);   min-width: 140px; }
.col-7  { flex: 1 1 calc(58.33% - 6px);  min-width: 150px; }
.filter-form .form-row { align-items: flex-end; }

/* Form section dividers */
.form-section {
  font-size: 11px; font-weight: 700; color: var(--primary);
  text-transform: uppercase; letter-spacing: .08em;
  padding: 4px 0; margin: 20px 0 14px;
  border-bottom: 2px solid var(--primary-light);
  display: flex; align-items: center; gap: 8px;
}
.form-section::before {
  content: ''; display: inline-block; width: 3px; height: 14px;
  background: var(--primary); border-radius: 2px; flex-shrink: 0;
}

/* ── Alerts ──────────────────────────────────────────────── */
.alert {
  padding: 12px 16px; border-radius: var(--radius); margin-bottom: 16px;
  font-size: 13px; display: flex; align-items: flex-start; gap: 8px;
  border-left: 4px solid transparent;
}
.alert i { margin-top: 1px; flex-shrink: 0; }
.alert-success { background: var(--success-light); color: var(--success); border-left-color: var(--success); }
.alert-danger  { background: var(--danger-light);  color: var(--danger);  border-left-color: var(--danger); }
.alert-info    { background: #e3f2fd; color: #1565c0;   border-left-color: #1565c0; }
.alert-warning { background: var(--warning-light); color: var(--warning); border-left-color: var(--warning); }

/* ── Auth pages ──────────────────────────────────────────── */
.auth-body {
  background: linear-gradient(135deg, #3f51b5 0%, #1a237e 60%, #7b1fa2 100%);
  min-height: 100vh; display: flex; align-items: center;
}
.auth-wrapper {
  width: 100%; display: flex; justify-content: center; align-items: center;
  min-height: 100vh; padding: 32px 16px;
}
.auth-card {
  background: var(--surface); border-radius: var(--radius-lg);
  padding: 44px 40px; width: 100%; max-width: 440px;
  box-shadow: var(--dp8);
}
.auth-logo { text-align: center; margin-bottom: 32px; }
.auth-logo h1 { font-size: 26px; font-weight: 700; color: var(--dark); margin-top: 10px; letter-spacing: -.02em; }
.auth-logo p  { color: #777; font-size: 13px; margin-top: 4px; }

.auth-form .form-group { margin-bottom: 20px; }
.auth-form .form-control {
  padding: 12px 16px; font-size: 14px; border-radius: var(--radius);
  background: #f5f6ff;
  border-color: #a0a8d8;
  color: #1c1b1f;
  -webkit-appearance: none; appearance: none;
}
.auth-form .form-control:focus {
  background: #fff;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(63,81,181,.18);
}
.auth-form select.form-control {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%233f51b5' d='M1 1l5 5 5-5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 36px;
}
.auth-form .btn-primary {
  padding: 13px 20px; font-size: 15px; letter-spacing: .03em; margin-top: 4px;
}
.auth-footer { text-align: center; color: #999; font-size: 12px; margin-top: 24px; }

.sso-section { margin-top: 20px; }
.divider { text-align: center; margin: 20px 0; position: relative; color: #bbb; font-size: 12px; }
.divider::before, .divider::after {
  content: ''; display: inline-block; width: 38%; height: 1px;
  background: var(--outline); vertical-align: middle; margin: 0 8px;
}

.schools-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 12px; margin-top: 16px; }
.school-card {
  border: 1.5px solid var(--outline); border-radius: var(--radius-md);
  padding: 16px; text-align: center; color: #333; transition: all var(--transition);
}
.school-card:hover { border-color: var(--primary); background: var(--primary-light); color: var(--primary); text-decoration: none; box-shadow: var(--dp2); }

/* ── Charts ──────────────────────────────────────────────── */
.charts-row { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin-bottom: 24px; }
.chart-card {
  background: var(--surface); border-radius: var(--radius-md);
  box-shadow: var(--dp1); padding: 20px;
  border: 1px solid rgba(0,0,0,.04);
}
.chart-card h3 { font-size: 13px; font-weight: 600; color: var(--dark); margin-bottom: 16px; text-transform: uppercase; letter-spacing: .04em; }

/* ── Course cards ────────────────────────────────────────── */
.courses-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 16px; }
.course-card {
  background: var(--surface); border-radius: var(--radius-md);
  box-shadow: var(--dp1); padding: 20px;
  border-top: 4px solid var(--primary); transition: all var(--transition);
  border-bottom: 1px solid rgba(0,0,0,.04);
}
.course-card:hover { box-shadow: var(--dp3); transform: translateY(-3px); }
.course-icon { font-size: 36px; margin-bottom: 12px; }
.course-card h3 { font-size: 15px; font-weight: 500; color: var(--dark); margin-bottom: 6px; }
.grade-tag { font-size: 11px; color: var(--primary); font-weight: 600; margin-bottom: 8px; }
.course-analytics-card { background: var(--bg); border-radius: var(--radius); padding: 16px; }
.course-stats { display: flex; justify-content: space-between; margin: 8px 0; font-size: 12px; }

/* ── Quick actions ───────────────────────────────────────── */
.quick-actions-row { display: grid; grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 16px; margin-bottom: 24px; }
.quick-action-card {
  background: var(--surface); border-radius: var(--radius-md);
  box-shadow: var(--dp1); padding: 24px 16px; text-align: center;
  color: var(--dark); border: 2px solid transparent; transition: all var(--transition);
}
.quick-action-card:hover {
  border-color: var(--primary); color: var(--primary); text-decoration: none;
  transform: translateY(-3px); box-shadow: var(--dp3); background: var(--primary-light);
}
.quick-action-card i { font-size: 28px; margin-bottom: 8px; display: block; }

/* ── Activity feed ───────────────────────────────────────── */
.activity-feed { display: flex; flex-direction: column; gap: 10px; }
.activity-item { display: flex; align-items: flex-start; gap: 12px; padding: 8px 0; border-bottom: 1px solid #f0f0f4; }
.activity-icon { font-size: 14px; margin-top: 2px; }
.activity-content { flex: 1; font-size: 13px; }
.activity-content .time { font-size: 11px; margin-left: 8px; color: #999; }

/* ── Attendance calendar ─────────────────────────────────── */
.attendance-calendar { display: grid; grid-template-columns: repeat(7, 1fr); gap: 6px; padding: 16px 0; }
.cal-day {
  aspect-ratio: 1; border-radius: 8px; display: flex; flex-direction: column;
  align-items: center; justify-content: center; font-size: 13px;
  background: #f5f5f5; font-weight: 500;
}
.cal-day.present  { background: var(--success-light); color: var(--success); }
.cal-day.absent   { background: var(--danger-light);  color: var(--danger); }
.cal-day.late     { background: var(--warning-light); color: var(--warning); }
.cal-day.excused  { background: #e3f2fd; color: #1565c0; }
.cal-day.empty    { background: transparent; }
.cal-day small    { font-size: 9px; }
.calendar-legend  { display: flex; gap: 16px; flex-wrap: wrap; margin-top: 8px; font-size: 12px; }
.legend-item { display: flex; align-items: center; gap: 6px; }
.legend-item::before { content:''; width: 12px; height: 12px; border-radius: 3px; display: inline-block; }
.legend-item.present::before { background: var(--success-light); border: 1px solid var(--success); }
.legend-item.absent::before  { background: var(--danger-light);  border: 1px solid var(--danger); }
.legend-item.late::before    { background: var(--warning-light); border: 1px solid var(--warning); }
.legend-item.excused::before { background: #e3f2fd; border: 1px solid #1565c0; }

/* ── Achievements ────────────────────────────────────────── */
.achievements-row  { display: flex; gap: 16px; flex-wrap: wrap; }
.achievements-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 12px; }
.achievement-badge, .achievement-card {
  background: var(--surface); border-radius: var(--radius-md); padding: 16px;
  text-align: center; box-shadow: var(--dp1);
}
.achievement-icon   { font-size: 32px; margin-bottom: 8px; }
.achievement-title  { font-size: 12px; font-weight: 600; color: var(--dark); }
.achievement-points { font-size: 11px; color: #f9a825; font-weight: 700; margin-top: 4px; }

/* ── Certificate cards ───────────────────────────────────── */
.certificates-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 20px; }
.certificate-card {
  background: var(--surface); border-radius: var(--radius-md);
  box-shadow: var(--dp1); padding: 24px; text-align: center;
  border-top: 4px solid #f9a825; position: relative;
}
.certificate-card.mini { padding: 16px; }
.cert-ribbon {
  position: absolute; top: 12px; right: 12px; font-size: 11px;
  background: #f9a825; color: #fff; padding: 3px 10px;
  border-radius: var(--radius-pill); font-weight: 600;
}
.cert-icon  { font-size: 48px; margin-bottom: 12px; }
.cert-date  { font-size: 12px; color: #999; margin: 8px 0; }
.cert-metrics { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; margin: 12px 0; font-size: 12px; }
.cert-metrics span { display: flex; align-items: center; gap: 4px; color: #555; }
.cert-code {
  font-family: 'Roboto Mono', monospace; font-size: 11px;
  background: var(--bg); padding: 4px 10px;
  border-radius: var(--radius-sm); display: inline-block; margin: 8px 0;
}
.cert-actions { display: flex; gap: 8px; justify-content: center; margin-top: 12px; }

/* ── Modals — Material Design ────────────────────────────── */
/*
 * display:block on the overlay (not flex) is the only reliable way to get
 * overflow-y:auto scrolling in WebViews / Android Chrome.
 * The dialog is centred via margin: 1.5rem auto.
 */
.modal {
  display: none; position: fixed; inset: 0;
  background: rgba(0,0,0,.55); z-index: 2000;
  overflow-y: auto; overflow-x: hidden;
  padding: 1.5rem 0;
  -webkit-overflow-scrolling: touch;
}
.modal.show { display: block; }

.modal-dialog {
  background: var(--surface); border-radius: var(--radius-lg); padding: 0;
  max-width: 540px; width: 92%; margin: 1.5rem auto;
  display: flex; flex-direction: column;
  box-shadow: var(--dp8);
  animation: modalIn .22s cubic-bezier(0.4, 0, 0.2, 1);
}
.modal-dialog.modal-lg { max-width: 840px; }
.modal-dialog.modal-sm { max-width: 420px; }

@keyframes modalIn {
  from { opacity: 0; transform: translateY(-20px) scale(.97); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

.modal-header {
  display: flex; justify-content: space-between; align-items: center;
  padding: 18px 24px; flex-shrink: 0;
  background: var(--primary); color: #fff;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}
.modal-header h3 { margin: 0; font-size: 15px; font-weight: 600; color: #fff; letter-spacing: .01em; }
.modal-header h3 i { opacity: .9; margin-right: 6px; }
.modal-close {
  background: rgba(255,255,255,.15); border: none; color: #fff;
  font-size: 18px; cursor: pointer; line-height: 1;
  width: 32px; height: 32px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  transition: background var(--transition); flex-shrink: 0;
}
.modal-close:hover { background: rgba(255,255,255,.3); }

/* Danger modal header override */
.modal-header.header-danger { background: var(--danger); }
.modal-header.header-success { background: var(--success); }
.modal-header.header-warning { background: #f57c00; }

/* form wraps modal-body + modal-footer — keep as flex col for footer pinning */
.modal-dialog > form {
  display: flex; flex-direction: column;
}

/* No max-height / scroll needed here — the modal overlay scrolls the whole dialog */
.modal-body {
  padding: 24px;
}

.modal-footer {
  padding: 14px 24px; border-top: 1px solid rgba(0,0,0,.08);
  display: flex; justify-content: flex-end; align-items: center;
  gap: 10px; flex-shrink: 0;
  background: #fafafa;
  border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}

/* ── Avatar circle ───────────────────────────────────────── */
.avatar-circle {
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--primary); color: #fff;
  border-radius: 50%; font-weight: 700; flex-shrink: 0;
}
.avatar-circle.avatar-sm { width: 34px; height: 34px; font-size: 13px; }
.avatar-lg { width: 64px; height: 64px; border-radius: 50%; overflow: hidden; flex-shrink: 0; }
.avatar-lg img { width: 100%; height: 100%; object-fit: cover; }
.avatar-placeholder {
  width: 64px; height: 64px; border-radius: 50%; background: var(--primary);
  display: flex; align-items: center; justify-content: center; font-size: 28px; color: #fff;
}

/* ── Utilities ───────────────────────────────────────────── */
.d-flex         { display: flex; }
.align-center   { align-items: center; }
.justify-between{ justify-content: space-between; }
.gap-3          { gap: 12px; }
.mt-2           { margin-top: 8px; }
.mt-3           { margin-top: 14px; }
.mb-3           { margin-bottom: 14px; }
.text-muted     { color: #999; }
.text-center    { text-align: center; }
.text-primary   { color: var(--primary); }
.fw-500         { font-weight: 500; }

/* Empty state */
.empty-state { text-align: center; padding: 64px 24px; color: #bbb; }
.empty-state h2 { color: #777; margin: 16px 0 8px; font-weight: 400; }

/* Batch cards */
.batches-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 16px; }
.batch-card { background: var(--bg); border-radius: var(--radius); padding: 16px; }
.batch-actions { display: flex; gap: 8px; margin-top: 12px; flex-wrap: wrap; }

/* Student performance */
.student-profile-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin-bottom: 24px; }
.enrollment-row, .att-summary-row { padding: 10px 0; border-bottom: 1px solid #f0f0f4; }
.enrollment-row strong, .att-summary-row span { font-size: 13px; }

/* Portfolio */
.portfolio-profile .card-body { gap: 16px; }
.projects-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 16px; }
.project-card  { background: var(--bg); border-radius: var(--radius); padding: 16px; }
.project-type-icon { font-size: 32px; margin-bottom: 8px; }

/* Progress bar container */
.progress-bar-container {
  background: #e8eaf6; border-radius: 4px; height: 8px; overflow: hidden;
}
.progress-bar { height: 100%; border-radius: 4px; background: var(--primary); }

/* Flash messages */
.alert-flash { position: fixed; top: 70px; right: 20px; z-index: 3000; min-width: 280px; box-shadow: var(--dp3); }

/* SSO config */
select.form-control option { padding: 4px; }

/* ── Responsive ──────────────────────────────────────────── */

/* Tablet — collapse to 2-col stats, 1-col charts */
@media (max-width: 960px) {
  .stats-grid  { grid-template-columns: repeat(2, 1fr); }
  .charts-row  { grid-template-columns: 1fr; }
  .quick-actions-row { grid-template-columns: repeat(3, 1fr); }
}

/* Mobile */
@media (max-width: 768px) {
  /* Sidebar */
  .sidebar      { transform: translateX(calc(-1 * var(--sidebar-w))); }
  .sidebar.open { transform: translateX(0); }

  /* Content */
  .main-content { margin-left: 0; padding: 14px; }

  /* Page header stacks */
  .page-header.d-flex,
  .page-header { flex-direction: column; align-items: flex-start; gap: 10px; }

  /* Grids collapse */
  .stats-grid, .student-profile-grid,
  .courses-grid, .certificates-grid,
  .achievements-grid, .quick-actions-row { grid-template-columns: 1fr; }

  /* Card header stacks */
  .card-header { flex-direction: column; align-items: flex-start; gap: 8px; }
  .card-header input.form-control { width: 100% !important; }
  .card-header > div { flex-wrap: wrap; gap: 6px; }

  /* Form rows → full width */
  .form-row .col-2, .form-row .col-3,
  .form-row .col-4, .form-row .col-5,
  .form-row .col-6, .form-row .col-7 { flex: 1 1 100%; min-width: 0; }

  /* Auth card */
  .auth-card    { padding: 28px 20px; }

  /* Modals — tighter padding, body height recalculated for mobile */
  .modal        { padding: .5rem 0; }
  .modal-dialog { width: 97%; }
  .modal-body   { padding: 16px; max-height: calc(100vh - 150px); }
  .modal-footer { padding: 12px 16px; flex-wrap: wrap; }

  /* Table tighter */
  .table th, .table td { padding: 8px 10px; font-size: 12px; }

  /* Buttons */
  .btn-group { flex-wrap: wrap; }
}

/* Small phones */
@media (max-width: 480px) {
  .stats-grid   { grid-template-columns: 1fr 1fr; }
  .topbar-school { display: none; }
  .main-content  { padding: 10px; }
  .modal-header  { padding: 14px 16px; }
  .modal-header h3 { font-size: 13px; }
  .btn { font-size: 12px; padding: 8px 14px; }
  .btn-sm { padding: 4px 10px; font-size: 11px; }
}

/* ── New Feature Styles (Teacher Handbook / Tips / Seeds) ─────── */

/* Lesson modal — large dialog for handbook */
.modal-lg { max-width: min(860px, 96vw); }
@media (max-width: 768px) { .modal-lg { max-width: 98vw; } }

/* Teacher handbook display */
.teacher-handbook-panel {
  background: linear-gradient(135deg, #1565c0, #1976d2);
  border-radius: 10px; padding: 1.25rem; color: #fff; margin-bottom: 1.25rem;
}
.teacher-handbook-panel h3 { margin: 0 0 .75rem; font-size: .95rem; }
.handbook-content { background: rgba(255,255,255,.12); border-radius: 8px; padding: .875rem; font-size: .85rem; line-height: 1.7; }
.handbook-content h2, .handbook-content h3, .handbook-content h4 { color: #fff; margin: .6rem 0 .25rem; font-size: .9rem; }
.handbook-content p, .handbook-content li { color: rgba(255,255,255,.92); }
.handbook-content ul, .handbook-content ol { padding-left: 18px; }

/* Seed grid */
.seed-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 18px; margin-top: 1.25rem; }
@media (max-width: 640px) { .seed-grid { grid-template-columns: 1fr; } }

/* Slide tip badges */
.tip-badge-student { background: #e8f5e9; border: 1px solid #a5d6a7; color: #2e7d32; }
.tip-badge-teacher { background: #e3f2fd; border: 1px solid #90caf9; color: #1565c0; }

/* Form tabs in modals */
.lm-tab.active { color: #4f86f7 !important; border-bottom-color: #4f86f7 !important; }

/* Performance: use contain for heavy cards */
.slide-card, .seed-card { contain: layout style; }

/* Smooth transitions */
.slide-panel { animation: fadeIn .2s ease; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }