/* ============================================================
   Mentor Portal – Premium Dark UI
   Design System: HSL-based, Dark Mode, Glassmorphism
   Font: Inter (Google Fonts)
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* ─── CSS Variables ─────────────────────────────────────────── */
:root {
  /* Colors */
  --bg-base:        hsl(220, 40%, 8%);
  --bg-surface:     hsl(220, 35%, 12%);
  --bg-elevated:    hsl(220, 30%, 16%);
  --bg-hover:       hsl(220, 28%, 20%);
  --border:         hsl(220, 20%, 22%);
  --border-subtle:  hsl(220, 15%, 18%);

  /* Accent */
  --accent:         hsl(195, 85%, 50%);
  --accent-dim:     hsl(195, 70%, 40%);
  --accent-glow:    hsl(195, 85%, 50%, 0.15);
  --accent-2:       hsl(250, 75%, 65%);  /* Purple */
  --accent-2-glow:  hsl(250, 75%, 65%, 0.12);

  /* Status */
  --success:        hsl(142, 70%, 45%);
  --success-bg:     hsl(142, 70%, 45%, 0.12);
  --warning:        hsl(38, 95%, 55%);
  --warning-bg:     hsl(38, 95%, 55%, 0.12);
  --danger:         hsl(0, 72%, 55%);
  --danger-bg:      hsl(0, 72%, 55%, 0.12);
  --info:           hsl(195, 85%, 50%);
  --info-bg:        hsl(195, 85%, 50%, 0.12);

  /* Text */
  --text-primary:   hsl(215, 25%, 90%);
  --text-secondary: hsl(215, 15%, 60%);
  --text-muted:     hsl(215, 10%, 45%);
  --text-inverse:   hsl(220, 40%, 8%);

  /* Layout */
  --sidebar-w:      260px;
  --topbar-h:       64px;
  --radius-sm:      6px;
  --radius:         10px;
  --radius-lg:      16px;
  --radius-xl:      24px;

  /* Shadows */
  --shadow-sm:   0 1px 3px rgba(0,0,0,0.4);
  --shadow:      0 4px 16px rgba(0,0,0,0.5);
  --shadow-lg:   0 8px 32px rgba(0,0,0,0.6);
  --shadow-glow: 0 0 24px hsl(195, 85%, 50%, 0.2);

  /* Transitions */
  --t-fast:  0.12s ease;
  --t-norm:  0.22s ease;
  --t-slow:  0.4s ease;
}

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

html {
  font-size: 15px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: 'Inter', system-ui, sans-serif;
  background: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
}

a { color: var(--accent); text-decoration: none; transition: color var(--t-fast); }
a:hover { color: hsl(195, 100%, 65%); }

img, video { max-width: 100%; height: auto; display: block; }

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

/* ─── App Layout ────────────────────────────────────────────── */
.app-wrapper {
  display: flex;
  min-height: 100vh;
}

/* ─── Sidebar ───────────────────────────────────────────────── */
.sidebar {
  width: var(--sidebar-w);
  background: var(--bg-surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0; left: 0; bottom: 0;
  z-index: 100;
  transition: transform var(--t-norm);
}

.sidebar-brand {
  padding: 24px 20px 20px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 12px;
}

.sidebar-brand-icon {
  width: 40px; height: 40px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  font-size: 18px;
  box-shadow: var(--shadow-glow);
  flex-shrink: 0;
}

.sidebar-brand-text h1 {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
}

.sidebar-brand-text span {
  font-size: 11px;
  color: var(--text-muted);
  font-weight: 400;
}

.sidebar-nav {
  flex: 1;
  padding: 16px 12px;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}

.nav-section-label {
  font-size: 10px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  padding: 12px 8px 6px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius);
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
  transition: all var(--t-fast);
  cursor: pointer;
  position: relative;
  margin-bottom: 2px;
}

.nav-item:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
}

.nav-item.active {
  background: linear-gradient(135deg, var(--accent-glow), var(--accent-2-glow));
  color: var(--accent);
  border: 1px solid hsl(195, 85%, 50%, 0.2);
}

.nav-item.active::before {
  content: '';
  position: absolute;
  left: 0; top: 20%; bottom: 20%;
  width: 3px;
  background: var(--accent);
  border-radius: 0 3px 3px 0;
}

.nav-icon { width: 18px; text-align: center; font-size: 16px; flex-shrink: 0; }

.nav-badge {
  margin-left: auto;
  background: var(--danger);
  color: #fff;
  font-size: 10px;
  font-weight: 700;
  padding: 2px 6px;
  border-radius: 10px;
  min-width: 18px;
  text-align: center;
  line-height: 1.4;
}

.sidebar-footer {
  padding: 16px 12px;
  border-top: 1px solid var(--border);
}

.sidebar-user {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: var(--radius);
  background: var(--bg-elevated);
  transition: background var(--t-fast);
}

.sidebar-user:hover { background: var(--bg-hover); }

.user-avatar {
  width: 34px; height: 34px;
  background: linear-gradient(135deg, var(--accent-dim), var(--accent-2));
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 13px;
  color: #fff; flex-shrink: 0;
}

.user-info { flex: 1; min-width: 0; }
.user-info strong { display: block; font-size: 13px; font-weight: 600; color: var(--text-primary); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.user-info span { font-size: 11px; color: var(--text-muted); }

/* ─── Main Content ──────────────────────────────────────────── */
.main-content {
  margin-left: var(--sidebar-w);
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* ─── Topbar ────────────────────────────────────────────────── */
.topbar {
  height: var(--topbar-h);
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  padding: 0 28px;
  gap: 16px;
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(12px);
  background: hsl(220, 35%, 12%, 0.85);
}

.topbar-title {
  font-size: 18px;
  font-weight: 600;
  flex: 1;
}

.topbar-actions { display: flex; align-items: center; gap: 12px; }

.notification-bell {
  position: relative;
  width: 40px; height: 40px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  font-size: 18px;
  transition: all var(--t-fast);
  color: var(--text-secondary);
}

.notification-bell:hover {
  background: var(--bg-hover);
  color: var(--text-primary);
  border-color: var(--accent);
}

.notification-bell .badge {
  position: absolute;
  top: -4px; right: -4px;
  background: var(--danger);
  color: #fff;
  font-size: 9px;
  font-weight: 700;
  width: 16px; height: 16px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  border: 2px solid var(--bg-surface);
  animation: pulse-badge 2s infinite;
}

@keyframes pulse-badge {
  0%, 100% { box-shadow: 0 0 0 0 hsl(0, 72%, 55%, 0.4); }
  50% { box-shadow: 0 0 0 5px hsl(0, 72%, 55%, 0); }
}

/* ─── Page Content ──────────────────────────────────────────── */
.page-content {
  padding: 28px;
  flex: 1;
}

/* ─── Cards ─────────────────────────────────────────────────── */
.card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.card-glass {
  background: hsl(220, 30%, 14%, 0.7);
  backdrop-filter: blur(16px);
  border: 1px solid hsl(220, 25%, 28%);
}

.card-header {
  padding: 20px 24px 16px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.card-title {
  font-size: 15px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
}

.card-body { padding: 24px; }

/* ─── Stat Cards ────────────────────────────────────────────── */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  margin-bottom: 28px;
}

.stat-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 22px 24px;
  display: flex;
  align-items: center;
  gap: 16px;
  transition: all var(--t-norm);
  position: relative;
  overflow: hidden;
}

.stat-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  opacity: 0;
  transition: opacity var(--t-norm);
}

.stat-card:hover { border-color: hsl(220, 20%, 30%); transform: translateY(-2px); box-shadow: var(--shadow); }
.stat-card:hover::before { opacity: 1; }

.stat-icon {
  width: 48px; height: 48px;
  border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
}

.stat-icon.blue   { background: var(--info-bg);    color: var(--info); }
.stat-icon.green  { background: var(--success-bg);  color: var(--success); }
.stat-icon.yellow { background: var(--warning-bg);  color: var(--warning); }
.stat-icon.red    { background: var(--danger-bg);   color: var(--danger); }
.stat-icon.purple { background: var(--accent-2-glow); color: var(--accent-2); }

.stat-info { flex: 1; }
.stat-value { font-size: 26px; font-weight: 800; line-height: 1; margin-bottom: 4px; }
.stat-label { font-size: 12px; color: var(--text-secondary); font-weight: 500; }

/* ─── Forms ─────────────────────────────────────────────────── */
.form-group { margin-bottom: 18px; }
.form-label {
  display: block;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-secondary);
  margin-bottom: 6px;
}
.form-label .required { color: var(--danger); margin-left: 2px; }

.form-control {
  width: 100%;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 14px;
  color: var(--text-primary);
  font-size: 14px;
  transition: all var(--t-fast);
  outline: none;
}

.form-control:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
  background: var(--bg-elevated);
}

.form-control::placeholder { color: var(--text-muted); }

.form-control:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

select.form-control {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%2364748b' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
}

textarea.form-control { resize: vertical; min-height: 90px; }

.form-error { font-size: 12px; color: var(--danger); margin-top: 5px; display: flex; align-items: center; gap: 4px; }

.form-row { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 16px; }

/* ─── Buttons ───────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  padding: 10px 20px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all var(--t-fast);
  white-space: nowrap;
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0);
  transition: background var(--t-fast);
}
.btn:hover::after { background: rgba(255,255,255,0.06); }

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-dim));
  color: hsl(220, 40%, 8%);
  box-shadow: 0 4px 12px var(--accent-glow);
}
.btn-primary:hover {
  box-shadow: 0 6px 20px hsl(195, 85%, 50%, 0.35);
  transform: translateY(-1px);
  color: hsl(220, 40%, 8%);
}

.btn-secondary {
  background: var(--bg-elevated);
  color: var(--text-primary);
  border: 1px solid var(--border);
}
.btn-secondary:hover { background: var(--bg-hover); border-color: hsl(220, 20%, 32%); }

.btn-danger { background: var(--danger-bg); color: var(--danger); border: 1px solid hsl(0,72%,55%,0.3); }
.btn-danger:hover { background: var(--danger); color: #fff; }

.btn-success { background: var(--success-bg); color: var(--success); border: 1px solid hsl(142,70%,45%,0.3); }
.btn-success:hover { background: var(--success); color: #fff; }

.btn-warning { background: var(--warning-bg); color: var(--warning); border: 1px solid hsl(38,95%,55%,0.3); }
.btn-warning:hover { background: var(--warning); color: var(--bg-base); }

.btn-sm { padding: 6px 12px; font-size: 12px; }
.btn-lg { padding: 14px 28px; font-size: 16px; }
.btn-icon { padding: 9px; }

.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none !important; }

/* ─── Tables ────────────────────────────────────────────────── */
.table-wrapper { overflow-x: auto; border-radius: var(--radius-lg); border: 1px solid var(--border); }

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13.5px;
}

thead tr {
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border);
}

th {
  padding: 12px 16px;
  text-align: left;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--text-muted);
  white-space: nowrap;
}

td {
  padding: 13px 16px;
  border-bottom: 1px solid var(--border-subtle);
  vertical-align: middle;
  color: var(--text-secondary);
}

td strong { color: var(--text-primary); font-weight: 600; }

tbody tr { transition: background var(--t-fast); }
tbody tr:hover { background: var(--bg-elevated); }
tbody tr:last-child td { border-bottom: none; }

/* ─── Badges / Pills ────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 600;
}

.badge-success { background: var(--success-bg); color: var(--success); }
.badge-danger  { background: var(--danger-bg);  color: var(--danger);  }
.badge-warning { background: var(--warning-bg); color: var(--warning); }
.badge-info    { background: var(--info-bg);    color: var(--info);    }
.badge-muted   { background: var(--bg-elevated); color: var(--text-muted); }

/* ─── Alerts / Flash ────────────────────────────────────────── */
.alert {
  padding: 14px 18px;
  border-radius: var(--radius);
  font-size: 14px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  border-left: 3px solid;
  margin-bottom: 20px;
}

.alert-success { background: var(--success-bg); border-color: var(--success); color: hsl(142, 60%, 70%); }
.alert-danger  { background: var(--danger-bg);  border-color: var(--danger);  color: hsl(0, 72%, 75%); }
.alert-warning { background: var(--warning-bg); border-color: var(--warning); color: hsl(38, 95%, 75%); }
.alert-info    { background: var(--info-bg);    border-color: var(--info);    color: hsl(195, 70%, 75%); }

/* ─── Modals ────────────────────────────────────────────────── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  backdrop-filter: blur(4px);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--t-norm);
}

.modal-overlay.open {
  opacity: 1;
  pointer-events: all;
}

.modal {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  width: 100%;
  max-width: 560px;
  box-shadow: var(--shadow-lg);
  transform: translateY(20px) scale(0.97);
  transition: transform var(--t-norm);
  max-height: 90vh;
  overflow-y: auto;
}

.modal-overlay.open .modal {
  transform: translateY(0) scale(1);
}

.modal-header {
  padding: 22px 24px 18px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.modal-title { font-size: 17px; font-weight: 700; }

.modal-close {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  width: 32px; height: 32px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 18px;
  display: flex; align-items: center; justify-content: center;
  transition: all var(--t-fast);
}
.modal-close:hover { background: var(--danger-bg); color: var(--danger); border-color: transparent; }

.modal-body { padding: 24px; }
.modal-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border);
  display: flex;
  gap: 10px;
  justify-content: flex-end;
}

/* ─── Notification Dropdown ─────────────────────────────────── */
.notif-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  width: 360px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  z-index: 300;
  overflow: hidden;
  opacity: 0;
  pointer-events: none;
  transform: translateY(-8px);
  transition: all var(--t-norm);
}

.notif-dropdown.open {
  opacity: 1;
  pointer-events: all;
  transform: translateY(0);
}

.notif-header {
  padding: 16px 18px 12px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  font-weight: 600;
}

.notif-list { max-height: 340px; overflow-y: auto; scrollbar-width: thin; scrollbar-color: var(--border) transparent; }

.notif-item {
  padding: 14px 18px;
  border-bottom: 1px solid var(--border-subtle);
  cursor: pointer;
  transition: background var(--t-fast);
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

.notif-item:hover { background: var(--bg-elevated); }
.notif-item.unread { background: hsl(195, 85%, 50%, 0.05); }
.notif-item.unread::before { content: ''; width: 7px; height: 7px; background: var(--accent); border-radius: 50%; flex-shrink: 0; margin-top: 5px; }

.notif-text { flex: 1; }
.notif-text p { font-size: 13px; color: var(--text-primary); line-height: 1.5; margin-bottom: 2px; }
.notif-text time { font-size: 11px; color: var(--text-muted); }

.notif-empty {
  padding: 32px 18px;
  text-align: center;
  color: var(--text-muted);
  font-size: 13px;
}

/* ─── Calendar ──────────────────────────────────────────────── */
.calendar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.calendar-nav { display: flex; align-items: center; gap: 10px; }
.calendar-month { font-size: 20px; font-weight: 700; }

.calendar-grid {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.calendar-days-header {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  background: var(--bg-elevated);
  border-bottom: 1px solid var(--border);
}

.cal-day-name {
  padding: 10px;
  text-align: center;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.07em;
}

.calendar-body {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
}

.cal-cell {
  border-right: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  min-height: 100px;
  padding: 6px;
  transition: background var(--t-fast);
  vertical-align: top;
}

.cal-cell:hover { background: var(--bg-elevated); }
.cal-cell:nth-child(7n) { border-right: none; }

.cal-date {
  font-size: 12px;
  font-weight: 600;
  width: 24px; height: 24px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 50%;
  margin-bottom: 4px;
  color: var(--text-secondary);
}

.cal-cell.today .cal-date {
  background: var(--accent);
  color: var(--bg-base);
}

.cal-cell.other-month .cal-date { color: var(--text-muted); opacity: 0.5; }

.cal-event {
  font-size: 11px;
  padding: 2px 7px;
  border-radius: 4px;
  margin-bottom: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  cursor: pointer;
  font-weight: 500;
  transition: filter var(--t-fast);
}

.cal-event:hover { filter: brightness(1.2); }
.cal-event.accepted  { background: var(--success-bg); color: var(--success); }
.cal-event.declined  { background: var(--danger-bg);  color: var(--danger);  }
.cal-event.tentative { background: var(--warning-bg); color: var(--warning); }
.cal-event.pending   { background: var(--bg-elevated); color: var(--text-secondary); border: 1px solid var(--border); }

/* ─── Wizard Steps ──────────────────────────────────────────── */
.wizard-steps {
  display: flex;
  align-items: center;
  gap: 0;
  margin-bottom: 32px;
}

.wizard-step {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 1;
}

.step-number {
  width: 36px; height: 36px;
  border-radius: 50%;
  border: 2px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  font-size: 13px;
  font-weight: 700;
  color: var(--text-muted);
  background: var(--bg-elevated);
  transition: all var(--t-norm);
  flex-shrink: 0;
}

.step-label { font-size: 13px; font-weight: 500; color: var(--text-muted); transition: color var(--t-norm); }

.wizard-step.active .step-number { background: var(--accent); border-color: var(--accent); color: var(--bg-base); box-shadow: 0 0 16px var(--accent-glow); }
.wizard-step.active .step-label { color: var(--text-primary); }
.wizard-step.done .step-number { background: var(--success-bg); border-color: var(--success); color: var(--success); }
.wizard-step.done .step-label { color: var(--text-secondary); }

.wizard-connector {
  height: 2px;
  flex: 1;
  background: var(--border);
  margin: 0 8px;
  transition: background var(--t-norm);
}

.wizard-connector.done { background: var(--success); }

/* ─── Mentee Table (Dynamic) ────────────────────────────────── */
.mentee-table-wrapper { overflow-x: auto; }
.mobile-label { display: none; }

.mentee-row {
  display: grid;
  grid-template-columns: 1fr 120px 120px 90px 1fr 90px 150px 90px 36px;
  gap: 8px;
  align-items: center;
  padding: 8px 0;
  border-bottom: 1px solid var(--border-subtle);
}

.mentee-row-header {
  grid-template-columns: 1fr 120px 120px 90px 1fr 90px 150px 90px 36px;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--text-muted);
  padding: 8px 0 4px;
}

.mentee-row .form-control { margin: 0; }

.add-row-btn {
  margin-top: 12px;
  width: 100%;
  background: var(--bg-elevated);
  border: 1px dashed var(--border);
  color: var(--text-secondary);
  border-radius: var(--radius);
  padding: 10px;
  font-size: 13px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: all var(--t-fast);
}
.add-row-btn:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-glow); }

/* ─── Toast Notifications ───────────────────────────────────── */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 500;
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-width: 380px;
}

.toast {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 14px 18px;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  box-shadow: var(--shadow-lg);
  animation: slide-in-right 0.3s ease;
  border-left: 3px solid;
}

.toast.success { border-left-color: var(--success); }
.toast.danger  { border-left-color: var(--danger);  }
.toast.info    { border-left-color: var(--info);    }
.toast.warning { border-left-color: var(--warning); }

@keyframes slide-in-right {
  from { transform: translateX(100%); opacity: 0; }
  to   { transform: translateX(0);   opacity: 1; }
}

@keyframes fade-out {
  from { opacity: 1; transform: translateX(0); }
  to   { opacity: 0; transform: translateX(40px); }
}

.toast.removing { animation: fade-out 0.3s ease forwards; }

.toast-icon { font-size: 18px; flex-shrink: 0; margin-top: 1px; }
.toast-body { flex: 1; }
.toast-title { font-size: 13px; font-weight: 600; color: var(--text-primary); }
.toast-msg   { font-size: 12px; color: var(--text-secondary); margin-top: 2px; }

/* ─── Login Page ────────────────────────────────────────────── */
.login-bg {
  min-height: 100vh;
  background: var(--bg-base);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  position: relative;
  overflow: hidden;
}

.login-bg::before {
  content: '';
  position: absolute;
  width: 600px; height: 600px;
  background: radial-gradient(circle, hsl(195, 85%, 50%, 0.08) 0%, transparent 70%);
  top: -200px; left: -200px;
}

.login-bg::after {
  content: '';
  position: absolute;
  width: 500px; height: 500px;
  background: radial-gradient(circle, hsl(250, 75%, 65%, 0.08) 0%, transparent 70%);
  bottom: -200px; right: -200px;
}

.login-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 44px 48px;
  width: 100%;
  max-width: 420px;
  box-shadow: var(--shadow-lg), 0 0 60px hsl(195, 85%, 50%, 0.06);
  position: relative;
  z-index: 1;
}

.login-logo {
  text-align: center;
  margin-bottom: 32px;
}

.login-logo-icon {
  width: 60px; height: 60px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-radius: var(--radius-lg);
  display: flex; align-items: center; justify-content: center;
  font-size: 26px;
  margin: 0 auto 16px;
  box-shadow: var(--shadow-glow);
}

.login-logo h1 {
  font-size: 22px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 4px;
}

.login-logo p {
  font-size: 13px;
  color: var(--text-secondary);
}

.rate-limit-banner {
  background: var(--danger-bg);
  border: 1px solid hsl(0, 72%, 55%, 0.3);
  border-radius: var(--radius);
  padding: 12px 14px;
  font-size: 13px;
  color: hsl(0, 72%, 75%);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

/* ─── News Cards ────────────────────────────────────────────── */
.news-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 20px; }

.news-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--t-norm);
}

.news-card:hover { border-color: hsl(220, 20%, 30%); transform: translateY(-3px); box-shadow: var(--shadow); }

.news-card-header { padding: 20px 20px 12px; }
.news-card-title { font-size: 16px; font-weight: 700; color: var(--text-primary); margin-bottom: 8px; }
.news-card-meta { font-size: 12px; color: var(--text-muted); display: flex; gap: 12px; align-items: center; }
.news-card-body { padding: 0 20px 20px; font-size: 14px; color: var(--text-secondary); line-height: 1.7; }
.news-card-footer {
  padding: 14px 20px;
  border-top: 1px solid var(--border);
  display: flex;
  gap: 8px;
  justify-content: flex-end;
}

/* ─── Messages ──────────────────────────────────────────────── */
.message-list { display: flex; flex-direction: column; gap: 2px; }
.message-item {
  padding: 14px 18px;
  border-radius: var(--radius);
  cursor: pointer;
  display: flex;
  gap: 14px;
  align-items: flex-start;
  transition: background var(--t-fast);
  border: 1px solid transparent;
}
.message-item:hover { background: var(--bg-elevated); border-color: var(--border); }
.message-item.unread { background: hsl(195, 85%, 50%, 0.05); border-color: hsl(195, 85%, 50%, 0.15); }
.message-avatar {
  width: 38px; height: 38px;
  background: linear-gradient(135deg, var(--accent-dim), var(--accent-2));
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 13px; color: #fff; flex-shrink: 0;
}
.message-content { flex: 1; min-width: 0; }
.message-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 3px; }
.message-from { font-size: 13px; font-weight: 600; color: var(--text-primary); }
.message-time { font-size: 11px; color: var(--text-muted); }
.message-subject { font-size: 13px; color: var(--text-secondary); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.message-preview { font-size: 12px; color: var(--text-muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; margin-top: 2px; }

/* ─── Profile / Settings ────────────────────────────────────── */
.profile-section {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  margin-bottom: 20px;
}

.toggle-switch {
  display: flex;
  align-items: center;
  gap: 12px;
}

.toggle {
  position: relative;
  width: 44px;
  height: 24px;
}

.toggle input { opacity: 0; width: 0; height: 0; }

.toggle-slider {
  position: absolute;
  inset: 0;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: 24px;
  cursor: pointer;
  transition: all var(--t-norm);
}

.toggle-slider::before {
  content: '';
  position: absolute;
  width: 18px; height: 18px;
  left: 2px; top: 2px;
  background: var(--text-muted);
  border-radius: 50%;
  transition: all var(--t-norm);
}

.toggle input:checked + .toggle-slider { background: var(--accent-glow); border-color: var(--accent); }
.toggle input:checked + .toggle-slider::before { transform: translateX(20px); background: var(--accent); }

/* ─── Scrollbar ─────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: hsl(220, 15%, 30%); }

/* ─── Utilities ─────────────────────────────────────────────── */
.flex { display: flex; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 12px; }
.gap-4 { gap: 16px; }
.mt-4 { margin-top: 16px; }
.mb-4 { margin-bottom: 16px; }
.mb-6 { margin-bottom: 24px; }
.text-sm { font-size: 12px; }
.text-muted { color: var(--text-muted); }
.text-right { text-align: right; }
.font-bold { font-weight: 700; }
.w-full { width: 100%; }
.hidden { display: none !important; }
.overflow-hidden { overflow: hidden; }

/* ─── Responsive ────────────────────────────────────────────── */
@media (max-width: 900px) {
  :root { --sidebar-w: 0px; }

  .sidebar {
    transform: translateX(-260px);
    width: 260px;
  }

  .sidebar.mobile-open {
    transform: translateX(0);
    width: 260px;
    box-shadow: var(--shadow-lg);
  }

  .main-content { margin-left: 0; }

  .topbar { padding: 0 16px; }

  .page-content { padding: 16px; }

  .mentee-row {
    grid-template-columns: 1fr;
    gap: 6px;
    padding: 12px;
    background: var(--bg-elevated);
    border-radius: var(--radius);
    margin-bottom: 10px;
    border: 1px solid var(--border);
  }

  .mentee-row-header { display: none; }

  .mobile-label {
    display: block;
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-bottom: 4px;
    margin-top: 6px;
  }

  .login-card { padding: 32px 24px; }

  .messages-container {
    grid-template-columns: 1fr !important;
    height: auto !important;
    gap: 16px !important;
  }
}

@media (max-width: 600px) {
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .notif-dropdown { width: calc(100vw - 32px); right: -8px; }
}