/* CS Tracker — Modern Dashboard Theme */
:root {
  --bg:          #f0f2f7;
  --card-bg:     #ffffff;
  --border:      #e2e8f0;
  --primary:     #2c5cff;
  --primary-dk:  #1a47e0;
  --success:     #1f8a4c;
  --warning:     #d97706;
  --danger:      #c1372f;
  --muted:       #64748b;
  --text:        #0f172a;
  --sidebar-bg:  #1e293b;
  --sidebar-txt: #cbd5e1;
  --sidebar-act: #ffffff;
  --sidebar-w:   220px;
  --radius:      10px;
  --shadow:      0 1px 3px rgba(0,0,0,0.08), 0 1px 2px rgba(0,0,0,0.04);
  --shadow-md:   0 4px 12px rgba(0,0,0,0.10);
}

/* ── Reset ──────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif; font-size: 14px; background: var(--bg); color: var(--text); display: flex; min-height: 100vh; line-height: 1.5; }

/* ── Sidebar ─────────────────────────────────────────────────────────── */
#sidebar {
  width: var(--sidebar-w); min-width: var(--sidebar-w); background: var(--sidebar-bg);
  display: flex; flex-direction: column; height: 100vh; position: sticky; top: 0;
  overflow-y: auto; z-index: 100;
}
#sidebar .logo {
  padding: 20px 16px 16px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  margin-bottom: 8px;
}
#sidebar .logo h1 { color: white; font-size: 16px; font-weight: 700; }
#sidebar .logo span { color: var(--sidebar-txt); font-size: 11px; }
#sidebar nav { flex: 1; padding: 4px 8px; }
.nav-section { margin-bottom: 16px; }
.nav-section-label {
  color: rgba(255,255,255,0.35); font-size: 10px; font-weight: 700;
  letter-spacing: 1px; text-transform: uppercase;
  padding: 6px 8px 4px;
}
.nav-btn {
  display: flex; align-items: center; gap: 10px; width: 100%;
  padding: 8px 10px; border-radius: 7px; border: none; cursor: pointer;
  background: transparent; color: var(--sidebar-txt); font-size: 13px;
  text-align: left; transition: background 0.15s, color 0.15s;
}
.nav-btn:hover { background: rgba(255,255,255,0.08); color: white; }
.nav-btn.active { background: rgba(44,92,255,0.25); color: white; font-weight: 600; }
.nav-btn .icon { font-size: 15px; width: 20px; text-align: center; opacity: 0.8; }
.nav-btn .badge {
  margin-left: auto; background: var(--primary); color: white;
  font-size: 10px; padding: 1px 6px; border-radius: 10px; font-weight: 600;
}
#sidebar .user-section {
  padding: 12px 16px; border-top: 1px solid rgba(255,255,255,0.08);
  display: flex; align-items: center; gap: 10px;
}
#sidebar .user-section .avatar {
  width: 32px; height: 32px; border-radius: 50%; background: var(--primary);
  display: flex; align-items: center; justify-content: center;
  color: white; font-size: 13px; font-weight: 700; flex-shrink: 0;
}
#sidebar .user-section .user-info { flex: 1; min-width: 0; }
#sidebar .user-section .user-name { color: white; font-size: 12px; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
#sidebar .user-section .user-role { color: var(--sidebar-txt); font-size: 11px; }
#sidebar .user-section .logout-btn { background: none; border: none; color: var(--sidebar-txt); cursor: pointer; font-size: 16px; padding: 4px; }
#sidebar .user-section .logout-btn:hover { color: white; }

/* ── Main ────────────────────────────────────────────────────────────── */
#main { flex: 1; display: flex; flex-direction: column; min-width: 0; overflow-x: hidden; }
#topbar {
  background: var(--card-bg); border-bottom: 1px solid var(--border);
  padding: 0 24px; height: 56px; display: flex; align-items: center; gap: 12px;
  position: sticky; top: 0; z-index: 50; box-shadow: var(--shadow);
}
#topbar h2 { font-size: 16px; font-weight: 600; flex: 1; }
#topbar .breadcrumb { font-size: 12px; color: var(--muted); }
#content { padding: 24px; flex: 1; }

/* ── Cards ───────────────────────────────────────────────────────────── */
.card {
  background: var(--card-bg); border-radius: var(--radius);
  box-shadow: var(--shadow); border: 1px solid var(--border);
  padding: 20px; margin-bottom: 16px;
}
.card-h { display: flex; align-items: center; justify-content: space-between; margin-bottom: 14px; gap: 8px; }
.card-h h2, .card-h h3 { margin: 0; font-size: 15px; font-weight: 600; }

/* Stat tiles */
.stat-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px,1fr)); gap: 12px; margin-bottom: 20px; }
.stat-tile {
  background: var(--card-bg); border-radius: var(--radius); padding: 16px;
  border: 1px solid var(--border); box-shadow: var(--shadow); text-align: center;
}
.stat-tile .v { font-size: 28px; font-weight: 700; color: var(--primary); line-height: 1.1; }
.stat-tile .l { font-size: 11px; color: var(--muted); margin-top: 4px; text-transform: uppercase; letter-spacing: 0.5px; font-weight: 500; }

/* ── Tables ──────────────────────────────────────────────────────────── */
.table-wrap { overflow-x: auto; border-radius: 0 0 var(--radius) var(--radius); }
table { width: 100%; border-collapse: collapse; }
th { background: #f8fafc; font-weight: 600; font-size: 12px; text-align: left; padding: 9px 12px; color: var(--muted); text-transform: uppercase; letter-spacing: 0.4px; border-bottom: 1px solid var(--border); white-space: nowrap; }
td { padding: 9px 12px; border-bottom: 1px solid #f1f5f9; font-size: 13px; vertical-align: middle; }
tr:last-child td { border-bottom: none; }
tr.clickable { cursor: pointer; }
tr.clickable:hover td { background: #f8fafc; }
.ref-cell { background: #fafbfc; color: var(--muted); font-size: 12px; }

/* ── Buttons ─────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 16px; border-radius: 7px; border: none; cursor: pointer;
  font-size: 13px; font-weight: 500; transition: all 0.15s; white-space: nowrap;
  background: var(--primary); color: white; text-decoration: none;
}
.btn:hover { background: var(--primary-dk); transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn.ghost { background: transparent; color: var(--text); border: 1px solid var(--border); }
.btn.ghost:hover { background: var(--bg); transform: none; box-shadow: none; }
.btn.small { padding: 5px 10px; font-size: 12px; border-radius: 6px; }
.btn.success { background: var(--success); }
.btn.danger  { background: var(--danger); }
.btn[disabled] { opacity: 0.45; cursor: not-allowed; pointer-events: none; }

/* ── Forms ───────────────────────────────────────────────────────────── */
.field { margin-bottom: 14px; }
.field label { display: block; font-size: 12px; font-weight: 600; color: var(--muted); margin-bottom: 5px; text-transform: uppercase; letter-spacing: 0.4px; }
input, select, textarea {
  width: 100%; padding: 8px 12px; border: 1px solid var(--border);
  border-radius: 7px; font-size: 13px; background: var(--card-bg); color: var(--text);
  transition: border 0.15s, box-shadow 0.15s; outline: none;
}
input:focus, select:focus, textarea:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(44,92,255,0.1); }
.entry-input { border: 1px solid var(--border); border-radius: 5px; text-align: center; }
.entry-input:focus { border-color: var(--primary); box-shadow: 0 0 0 2px rgba(44,92,255,0.12); }

/* ── Badges & Chips ──────────────────────────────────────────────────── */
.grade-badge { display: inline-flex; align-items: center; justify-content: center; width: 26px; height: 26px; border-radius: 6px; font-size: 12px; font-weight: 700; }
.pill { display: inline-block; padding: 2px 9px; border-radius: 20px; font-size: 11px; font-weight: 600; }
.muted { color: var(--muted); }

/* ── Tabs (sub-page) ─────────────────────────────────────────────────── */
.tabs { display: flex; gap: 2px; background: #f1f5f9; padding: 3px; border-radius: 9px; flex-wrap: wrap; }
.tab-btn { padding: 6px 14px; border: none; border-radius: 7px; cursor: pointer; font-size: 13px; font-weight: 500; background: transparent; color: var(--muted); transition: all 0.15s; }
.tab-btn:hover { color: var(--text); }
.tab-btn.active { background: white; color: var(--primary); font-weight: 600; box-shadow: var(--shadow); }

/* ── Grade colours ───────────────────────────────────────────────────── */
.g9,.g8 { background: #166534; color: white; }
.g7,.g6 { background: #1f8a4c; color: white; }
.g5     { background: #2c5cff; color: white; }
.g4     { background: #d97706; color: white; }
.g3,.g2 { background: #dc2626; color: white; }
.g1,.gU { background: #6b7280; color: white; }
.gG { background: #d4a017; color: white; }  /* Gold */
.gS { background: #9aa0a6; color: white; }  /* Silver */
.gB { background: #a06030; color: white; }  /* Bronze */

/* ── Alerts ──────────────────────────────────────────────────────────── */
.empty { text-align: center; padding: 40px 16px; color: var(--muted); font-size: 13px; }
.error { background: #fef2f2; color: var(--danger); padding: 12px 16px; border-radius: 8px; border: 1px solid #fecaca; }
.toast { position: fixed; bottom: 24px; right: 24px; background: #1e293b; color: white; padding: 12px 20px; border-radius: 10px; font-size: 13px; font-weight: 500; z-index: 9999; box-shadow: var(--shadow-md); animation: slideUp 0.2s ease; max-width: 320px; }
.toast.error-toast { background: var(--danger); }
@keyframes slideUp { from { transform: translateY(16px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }

/* ── Misc ────────────────────────────────────────────────────────────── */
h1 { font-size: 22px; font-weight: 700; }
h2 { font-size: 17px; font-weight: 600; }
h3 { font-size: 15px; font-weight: 600; }
a  { color: var(--primary); text-decoration: none; }
a:hover { text-decoration: underline; }
.hidden { display: none !important; }
details summary { list-style: none; }
details summary::-webkit-details-marker { display: none; }

/* House colours */
.house-red    { background: #fecaca; color: #991b1b; }
.house-blue   { background: #bfdbfe; color: #1e40af; }
.house-green  { background: #bbf7d0; color: #166534; }
.house-yellow { background: #fef08a; color: #854d0e; }

/* ── Login ───────────────────────────────────────────────────────────── */
#loginWrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; background: linear-gradient(135deg, #1e293b 0%, #2c5cff 100%); }
#loginBox { background: white; padding: 40px; border-radius: 16px; width: 360px; box-shadow: 0 20px 60px rgba(0,0,0,0.3); }
#loginBox h1 { font-size: 24px; margin-bottom: 6px; }
#loginBox p { color: var(--muted); font-size: 13px; margin-bottom: 28px; }

/* ── Responsive ──────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  #sidebar { width: 60px; min-width: 60px; }
  .nav-btn span:not(.icon) { display: none; }
  .nav-section-label { display: none; }
  #sidebar .logo h1 { display: none; }
  #content { padding: 12px; }
}

/* Login overlay */
#loginWrap {
  position: fixed !important;
  inset: 0 !important;
  z-index: 99999 !important;
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
  background: linear-gradient(135deg, #1e293b 0%, #2c5cff 100%) !important;
}
#loginBox {
  background: white;
  padding: 40px;
  border-radius: 16px;
  width: 400px;
  max-width: 90vw;
  box-shadow: 0 24px 64px rgba(0,0,0,0.35);
}
#loginBox h1 { font-size: 24px; margin-bottom: 6px; }
#loginBox p.subtitle { color: var(--muted); font-size: 13px; margin-bottom: 28px; }
/* Append to styles.css */

/* Better topbar with filter bar */
#topbar {
  background: var(--card-bg);
  border-bottom: 1px solid var(--border);
  padding: 0 20px;
  height: auto;
  min-height: 52px;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  position: sticky;
  top: 0;
  z-index: 50;
  box-shadow: var(--shadow);
}

#topbar-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  flex: 1;
  min-width: 120px;
}

#topbar-right {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

#topbar-right select {
  padding: 6px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  font-size: 13px;
  background: var(--bg);
  color: var(--text);
  cursor: pointer;
  min-width: 140px;
  font-weight: 500;
}

#topbar-right select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(44,92,255,0.1);
  outline: none;
}

/* Nav improvements */
.nav-btn {
  padding: 9px 12px;
  border-radius: 8px;
  font-size: 13px;
  margin-bottom: 1px;
}

.nav-btn .ni {
  font-size: 16px;
}

.nav-group {
  margin-bottom: 24px;
}

.nav-group-label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1.2px;
  color: rgba(255,255,255,0.25);
  padding: 2px 12px 8px;
  text-transform: uppercase;
}

/* Sidebar divider */
.nav-group + .nav-group {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding-top: 16px;
}

/* Better student/cohort filter in content area */
.filter-bar {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
  padding: 12px 16px;
  background: var(--card-bg);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  margin-bottom: 16px;
}

.filter-bar label {
  font-size: 11px;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  white-space: nowrap;
}

.filter-bar select {
  padding: 7px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  font-size: 13px;
  background: var(--bg);
  min-width: 160px;
  cursor: pointer;
}

/* Dashboard cards grid */
.dash-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 14px;
  margin-bottom: 24px;
}

.dash-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 20px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 8px;
  cursor: pointer;
  transition: box-shadow 0.15s, transform 0.15s;
}

.dash-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.dash-card .dc-icon {
  font-size: 24px;
  line-height: 1;
}

.dash-card .dc-value {
  font-size: 28px;
  font-weight: 700;
  color: var(--primary);
  line-height: 1;
}

.dash-card .dc-label {
  font-size: 12px;
  color: var(--muted);
  font-weight: 500;
}

/* Better grade entry table */
.entry-table th {
  position: sticky;
  top: 52px;
  background: #f8fafc;
  z-index: 10;
}

/* Cohort badge pills */
.cohort-badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 600;
  background: #e0e7ff;
  color: #3730a3;
}

.ks3-badge { background: #d1fae5; color: #065f46; }
.ks4-badge { background: #fef3c7; color: #92400e; }

/* Responsive improvements */
@media (max-width: 900px) {
  #topbar-right { width: 100%; padding-bottom: 8px; }
  #topbar { padding: 8px 16px; }
}
/* Append to styles.css */

/* Better topbar with filter bar */
#topbar {
  background: var(--card-bg);
  border-bottom: 1px solid var(--border);
  padding: 0 20px;
  height: auto;
  min-height: 52px;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  position: sticky;
  top: 0;
  z-index: 50;
  box-shadow: var(--shadow);
}

#topbar-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  flex: 1;
  min-width: 120px;
}

#topbar-right {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

#topbar-right select {
  padding: 6px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  font-size: 13px;
  background: var(--bg);
  color: var(--text);
  cursor: pointer;
  min-width: 140px;
  font-weight: 500;
}

#topbar-right select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(44,92,255,0.1);
  outline: none;
}

/* Nav improvements */
.nav-btn {
  padding: 9px 12px;
  border-radius: 8px;
  font-size: 13px;
  margin-bottom: 1px;
}

.nav-btn .ni {
  font-size: 16px;
}

.nav-group {
  margin-bottom: 24px;
}

.nav-group-label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1.2px;
  color: rgba(255,255,255,0.25);
  padding: 2px 12px 8px;
  text-transform: uppercase;
}

/* Sidebar divider */
.nav-group + .nav-group {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding-top: 16px;
}

/* Better student/cohort filter in content area */
.filter-bar {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
  padding: 12px 16px;
  background: var(--card-bg);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  margin-bottom: 16px;
}

.filter-bar label {
  font-size: 11px;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  white-space: nowrap;
}

.filter-bar select {
  padding: 7px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  font-size: 13px;
  background: var(--bg);
  min-width: 160px;
  cursor: pointer;
}

/* Dashboard cards grid */
.dash-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 14px;
  margin-bottom: 24px;
}

.dash-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 20px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 8px;
  cursor: pointer;
  transition: box-shadow 0.15s, transform 0.15s;
}

.dash-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.dash-card .dc-icon {
  font-size: 24px;
  line-height: 1;
}

.dash-card .dc-value {
  font-size: 28px;
  font-weight: 700;
  color: var(--primary);
  line-height: 1;
}

.dash-card .dc-label {
  font-size: 12px;
  color: var(--muted);
  font-weight: 500;
}

/* Better grade entry table */
.entry-table th {
  position: sticky;
  top: 52px;
  background: #f8fafc;
  z-index: 10;
}

/* Cohort badge pills */
.cohort-badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 600;
  background: #e0e7ff;
  color: #3730a3;
}

.ks3-badge { background: #d1fae5; color: #065f46; }
.ks4-badge { background: #fef3c7; color: #92400e; }

/* Responsive improvements */
@media (max-width: 900px) {
  #topbar-right { width: 100%; padding-bottom: 8px; }
  #topbar { padding: 8px 16px; }
}
/* Append to styles.css */

/* Better topbar with filter bar */
#topbar {
  background: var(--card-bg);
  border-bottom: 1px solid var(--border);
  padding: 0 20px;
  height: auto;
  min-height: 52px;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  position: sticky;
  top: 0;
  z-index: 50;
  box-shadow: var(--shadow);
}

#topbar-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  flex: 1;
  min-width: 120px;
}

#topbar-right {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

#topbar-right select {
  padding: 6px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  font-size: 13px;
  background: var(--bg);
  color: var(--text);
  cursor: pointer;
  min-width: 140px;
  font-weight: 500;
}

#topbar-right select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(44,92,255,0.1);
  outline: none;
}

/* Nav improvements */
.nav-btn {
  padding: 9px 12px;
  border-radius: 8px;
  font-size: 13px;
  margin-bottom: 1px;
}

.nav-btn .ni {
  font-size: 16px;
}

.nav-group {
  margin-bottom: 24px;
}

.nav-group-label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1.2px;
  color: rgba(255,255,255,0.25);
  padding: 2px 12px 8px;
  text-transform: uppercase;
}

/* Sidebar divider */
.nav-group + .nav-group {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding-top: 16px;
}

/* Better student/cohort filter in content area */
.filter-bar {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
  padding: 12px 16px;
  background: var(--card-bg);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  margin-bottom: 16px;
}

.filter-bar label {
  font-size: 11px;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  white-space: nowrap;
}

.filter-bar select {
  padding: 7px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  font-size: 13px;
  background: var(--bg);
  min-width: 160px;
  cursor: pointer;
}

/* Dashboard cards grid */
.dash-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 14px;
  margin-bottom: 24px;
}

.dash-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 20px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 8px;
  cursor: pointer;
  transition: box-shadow 0.15s, transform 0.15s;
}

.dash-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.dash-card .dc-icon {
  font-size: 24px;
  line-height: 1;
}

.dash-card .dc-value {
  font-size: 28px;
  font-weight: 700;
  color: var(--primary);
  line-height: 1;
}

.dash-card .dc-label {
  font-size: 12px;
  color: var(--muted);
  font-weight: 500;
}

/* Better grade entry table */
.entry-table th {
  position: sticky;
  top: 52px;
  background: #f8fafc;
  z-index: 10;
}

/* Cohort badge pills */
.cohort-badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 600;
  background: #e0e7ff;
  color: #3730a3;
}

.ks3-badge { background: #d1fae5; color: #065f46; }
.ks4-badge { background: #fef3c7; color: #92400e; }

/* Responsive improvements */
@media (max-width: 900px) {
  #topbar-right { width: 100%; padding-bottom: 8px; }
  #topbar { padding: 8px 16px; }
}
/* Append to styles.css */

/* Better topbar with filter bar */
#topbar {
  background: var(--card-bg);
  border-bottom: 1px solid var(--border);
  padding: 0 20px;
  height: auto;
  min-height: 52px;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  position: sticky;
  top: 0;
  z-index: 50;
  box-shadow: var(--shadow);
}

#topbar-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  flex: 1;
  min-width: 120px;
}

#topbar-right {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

#topbar-right select {
  padding: 6px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  font-size: 13px;
  background: var(--bg);
  color: var(--text);
  cursor: pointer;
  min-width: 140px;
  font-weight: 500;
}

#topbar-right select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(44,92,255,0.1);
  outline: none;
}

/* Nav improvements */
.nav-btn {
  padding: 9px 12px;
  border-radius: 8px;
  font-size: 13px;
  margin-bottom: 1px;
}

.nav-btn .ni {
  font-size: 16px;
}

.nav-group {
  margin-bottom: 24px;
}

.nav-group-label {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1.2px;
  color: rgba(255,255,255,0.25);
  padding: 2px 12px 8px;
  text-transform: uppercase;
}

/* Sidebar divider */
.nav-group + .nav-group {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding-top: 16px;
}

/* Better student/cohort filter in content area */
.filter-bar {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
  padding: 12px 16px;
  background: var(--card-bg);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  margin-bottom: 16px;
}

.filter-bar label {
  font-size: 11px;
  font-weight: 600;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  white-space: nowrap;
}

.filter-bar select {
  padding: 7px 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
  font-size: 13px;
  background: var(--bg);
  min-width: 160px;
  cursor: pointer;
}

/* Dashboard cards grid */
.dash-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 14px;
  margin-bottom: 24px;
}

.dash-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 20px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 8px;
  cursor: pointer;
  transition: box-shadow 0.15s, transform 0.15s;
}

.dash-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.dash-card .dc-icon {
  font-size: 24px;
  line-height: 1;
}

.dash-card .dc-value {
  font-size: 28px;
  font-weight: 700;
  color: var(--primary);
  line-height: 1;
}

.dash-card .dc-label {
  font-size: 12px;
  color: var(--muted);
  font-weight: 500;
}

/* Better grade entry table */
.entry-table th {
  position: sticky;
  top: 52px;
  background: #f8fafc;
  z-index: 10;
}

/* Cohort badge pills */
.cohort-badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 600;
  background: #e0e7ff;
  color: #3730a3;
}

.ks3-badge { background: #d1fae5; color: #065f46; }
.ks4-badge { background: #fef3c7; color: #92400e; }

/* Responsive improvements */
@media (max-width: 900px) {
  #topbar-right { width: 100%; padding-bottom: 8px; }
  #topbar { padding: 8px 16px; }
}

/* Sidebar toggle */
#sidebar { transition: width 0.2s ease; }
#sidebar.collapsed { width: 58px; min-width: 58px; }
#sidebar.collapsed .nav-btn span:not(.ni) { display: none; }
#sidebar.collapsed .nav-group-label { display: none; }
#sidebar.collapsed .sb-logo span { display: none; }
#sidebar.collapsed .sb-logo h1 { display: none; }
#sidebar.collapsed .sb-uinfo { display: none; }
#sidebar.collapsed .nav-btn { justify-content: center; padding: 10px 0; }
#sidebar.collapsed .nav-btn .ni { width: auto; }
#sidebar.collapsed .nav-group { margin-bottom: 8px; }
#sidebar.collapsed .nav-group + .nav-group { padding-top: 8px; }
#toggle-sidebar {
  background: none; border: none; cursor: pointer; color: var(--sidebar-txt);
  font-size: 18px; padding: 4px 6px; border-radius: 6px; line-height: 1;
  transition: color 0.15s;
}
#toggle-sidebar:hover { color: white; background: rgba(255,255,255,0.08); }
.sb-logo { display: flex; align-items: center; justify-content: space-between; }

/* Content margin from sidebar */
#view { padding: 24px 28px; }
#main { min-width: 0; }

/* Compact filter selects */
.filter-row select,
.filter-row input[type="text"],
.filter-row input:not([type]) {
  width: auto;
  min-width: 0;
}

/* Students page filter selects */
#ksFilter, #cohortFilter, #houseFilter, #groupBy {
  width: auto !important;
  min-width: 0 !important;
}

/* RAG grade badges — consistent red/amber/green */
.grade-badge { display:inline-flex;align-items:center;justify-content:center;width:28px;height:28px;border-radius:7px;font-size:12px;font-weight:700; }
.g9 { background:#166534;color:#fff; }  /* Green — excellent */
.g8 { background:#15803d;color:#fff; }
.g7 { background:#16a34a;color:#fff; }
.g6 { background:#ca8a04;color:#fff; }  /* Amber — on track */
.g5 { background:#d97706;color:#fff; }
.g4 { background:#ea580c;color:#fff; }  /* Red-amber — borderline */
.g3 { background:#dc2626;color:#fff; }  /* Red — below */
.g2 { background:#b91c1c;color:#fff; }
.g1 { background:#991b1b;color:#fff; }
.gU { background:#94a3b8;color:#fff; }  /* Grey — U grade */

/* % colour coding — RAG */
.pct-green { color:#16a34a;font-weight:600; }
.pct-amber { color:#d97706;font-weight:600; }
.pct-red   { color:#dc2626;font-weight:600; }

/* Login page — centered card */
#loginWrap {
  position: fixed !important;
  inset: 0 !important;
  z-index: 99999 !important;
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
  background: linear-gradient(135deg, #1e293b 0%, #2c5cff 100%) !important;
}
#loginBox {
  background: white;
  padding: 44px 40px;
  border-radius: 18px;
  width: 420px;
  max-width: 90vw;
  box-shadow: 0 24px 64px rgba(0,0,0,0.4);
}
#loginBox h1 {
  font-size: 24px;
  font-weight: 800;
  margin-bottom: 6px;
  color: #0f172a;
}
#loginBox .subtitle {
  color: var(--muted);
  font-size: 13px;
  margin-bottom: 28px;
}
#loginBox .field label {
  font-size: 12px;
  font-weight: 600;
  color: #475569;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 6px;
  display: block;
}
#loginBox input {
  width: 100% !important;
  max-width: 100% !important;
  padding: 10px 14px;
  border: 1.5px solid #e2e8f0;
  border-radius: 8px;
  font-size: 14px;
  transition: border 0.15s, box-shadow 0.15s;
}
#loginBox input:focus {
  border-color: #2c5cff;
  box-shadow: 0 0 0 3px rgba(44,92,255,0.12);
  outline: none;
}
#loginBox .btn {
  width: 100%;
  padding: 12px;
  font-size: 14px;
  font-weight: 600;
  border-radius: 9px;
  margin-top: 8px;
  justify-content: center;
}
#loginBox .login-footer {
  text-align: center;
  margin-top: 20px;
  font-size: 12px;
  color: var(--muted);
}

/* Login — centered overlay */
.login-wrap {
  position: fixed;
  inset: 0;
  z-index: 99999;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #1e293b 0%, #1a47e0 100%);
}
.login-card {
  background: white;
  padding: 44px 40px;
  border-radius: 18px;
  width: 400px;
  max-width: 88vw;
  box-shadow: 0 24px 64px rgba(0,0,0,0.4);
}
.login-card h1 {
  font-size: 26px;
  font-weight: 800;
  margin-bottom: 4px;
  color: #0f172a;
  letter-spacing: -0.5px;
}
.login-card .sub {
  color: #64748b;
  font-size: 13px;
  margin-bottom: 28px;
}
.login-card .field {
  margin-bottom: 16px;
}
.login-card .field label {
  display: block;
  font-size: 11px;
  font-weight: 700;
  color: #475569;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  margin-bottom: 6px;
}
.login-card input {
  width: 100%;
  padding: 11px 14px;
  border: 1.5px solid #e2e8f0;
  border-radius: 9px;
  font-size: 14px;
  color: #0f172a;
  background: #f8fafc;
  transition: border 0.15s, box-shadow 0.15s;
  box-sizing: border-box;
}
.login-card input:focus {
  border-color: #2c5cff;
  box-shadow: 0 0 0 3px rgba(44,92,255,0.12);
  outline: none;
  background: white;
}
.login-card .btn {
  margin-top: 8px;
  padding: 12px;
  font-size: 14px;
  font-weight: 600;
  border-radius: 9px;
  justify-content: center;
}

/* Sidebar visibility fixes */
.sb-logout {
  background: rgba(255,255,255,0.1) !important;
  border: 1px solid rgba(255,255,255,0.2) !important;
  color: #e2e8f0 !important;
  border-radius: 7px;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  font-size: 16px;
  transition: all 0.15s;
}
.sb-logout:hover {
  background: rgba(255,255,255,0.2) !important;
  color: white !important;
}
.sb-uname { color: white !important; font-size: 12px; font-weight: 600; }
.sb-urole { color: #94a3b8 !important; font-size: 11px; text-transform: capitalize; }
.sb-avatar {
  background: #2c5cff !important;
  color: white !important;
  font-weight: 700;
  font-size: 13px;
}
/* Nav group Settings items - ensure visibility */
.nav-group:last-child .nav-btn { color: #94a3b8; }
.nav-group:last-child .nav-btn:hover { color: white; background: rgba(255,255,255,0.07); }
.nav-group:last-child .nav-btn.active { color: white; background: rgba(44,92,255,0.3); }

/* Sidebar user section - centered when collapsed */
.sb-user {
  padding: 12px 14px;
  border-top: 1px solid rgba(255,255,255,0.07);
  display: flex;
  align-items: center;
  gap: 10px;
  justify-content: space-between;
}
#sidebar.collapsed .sb-user {
  flex-direction: column;
  gap: 8px;
  padding: 12px 8px;
  align-items: center;
  justify-content: center;
}
#sidebar.collapsed .sb-logout {
  margin: 0 auto;
}

/* Logo centered when collapsed */
.sb-logo {
  padding: 16px 14px 12px;
  border-bottom: 1px solid rgba(255,255,255,0.07);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
#sidebar.collapsed .sb-logo {
  justify-content: center;
  padding: 14px 8px;
}
#sidebar.collapsed .sb-logo > div {
  justify-content: center;
}
#sidebar.collapsed #toggle-sidebar {
  display: none;
}

/* Show toggle button inside nav when collapsed */
#sidebar.collapsed nav::before {
  content: '☰';
  display: block;
  text-align: center;
  color: rgba(255,255,255,0.4);
  font-size: 18px;
  padding: 8px 0 4px;
  cursor: pointer;
}

/* Hide text labels when sidebar collapsed */
#sidebar.collapsed .sb-logo > div > div > div:last-child { display: none; }
#sidebar.collapsed .sb-logo > div > div { display: none; }
#sidebar.collapsed .sb-uinfo { display: none; }
#sidebar.collapsed .sb-uname { display: none; }
#sidebar.collapsed .sb-urole { display: none; }
#sidebar.collapsed #toggle-sidebar { display: none; }

/* Collapsed logo - just the RZ box centered */
#sidebar.collapsed .sb-logo {
  justify-content: center;
  padding: 14px 0;
}
#sidebar.collapsed .sb-logo > div {
  justify-content: center;
  gap: 0;
}

/* Collapsed: hide Progress/Mate text, keep PM box */
#sidebar.collapsed .sb-logo .razz-text { display: none; }

/* Collapsed: hide Progress/Mate text, keep PM box */
#sidebar.collapsed .sb-logo .razz-text { display: none; }

/* Keep PM text visible always - only hide the Progress/Mate labels */
#sidebar.collapsed .sb-logo span { display: flex !important; }
#sidebar.collapsed .sb-logo > div > div:first-child { display: flex !important; }