/* ===== ROOT VARIABLES ===== */
:root {
  --bg: #f9f9f7;
  --surface: #ffffff;
  --surface-2: #f4f4f1;
  --border: #e0dedd;
  --border-strong: #c8c6c4;
  --text: #1a1a18;
  --text-2: #4a4a48;
  --text-3: #7a7a78;
  --accent: #2c5282;
  --accent-light: #ebf0fa;
  --accent-hover: #1e3a5f;
  --danger: #b91c1c;
  --danger-light: #fef2f2;
  --success: #166534;
  --success-light: #f0fdf4;
  --warning: #92400e;
  --warning-light: #fffbeb;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
  --shadow: 0 4px 12px rgba(0,0,0,0.08), 0 2px 4px rgba(0,0,0,0.04);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.10), 0 4px 8px rgba(0,0,0,0.06);
  --radius: 8px;
  --radius-sm: 5px;
  --radius-lg: 12px;
  --font: 'DM Sans', 'Segoe UI', sans-serif;
  --font-mono: 'DM Mono', monospace;
  --mobile-nav-h: 60px;
}

/* ===== RESET ===== */
*, *::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: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
}

/* ===== TYPOGRAPHY ===== */
h1 { font-size: 1.75rem; font-weight: 700; letter-spacing: -0.02em; line-height: 1.2; }
h2 { font-size: 1.35rem; font-weight: 600; letter-spacing: -0.01em; }
h3 { font-size: 1.1rem; font-weight: 600; }
h4 { font-size: 0.95rem; font-weight: 600; }
p { color: var(--text-2); }
small { font-size: 0.82rem; color: var(--text-3); }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 18px;
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all 0.15s ease;
  white-space: nowrap;
  user-select: none;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn-primary:hover:not(:disabled) { background: var(--accent-hover); border-color: var(--accent-hover); }
.btn-secondary { background: var(--surface); color: var(--text); border-color: var(--border-strong); }
.btn-secondary:hover:not(:disabled) { background: var(--surface-2); }
.btn-danger { background: var(--danger); color: #fff; border-color: var(--danger); }
.btn-danger:hover:not(:disabled) { background: #991b1b; }
.btn-ghost { background: transparent; color: var(--text-2); border-color: transparent; padding: 6px 10px; }
.btn-ghost:hover:not(:disabled) { background: var(--surface-2); color: var(--text); }
.btn-sm { padding: 6px 12px; font-size: 0.82rem; }
.btn-full { width: 100%; justify-content: center; }

/* ===== INPUTS ===== */
.input-group { display: flex; flex-direction: column; gap: 5px; }
.input-group label { font-size: 0.85rem; font-weight: 500; color: var(--text-2); }
.input-wrap { position: relative; display: flex; align-items: center; }
.input-wrap input, input.field, select.field, textarea.field {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  font-family: var(--font);
  font-size: 1rem;
  color: var(--text);
  background: var(--surface);
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
  -webkit-appearance: none;
  appearance: none;
}
.input-wrap input:focus, input.field:focus, select.field:focus, textarea.field:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(44, 82, 130, 0.10);
}
.input-wrap .eye-btn {
  position: absolute;
  right: 10px;
  background: none;
  border: none;
  cursor: pointer;
  color: var(--text-3);
  padding: 6px;
  display: flex;
  align-items: center;
  touch-action: manipulation;
}
.input-wrap .eye-btn:hover { color: var(--text-2); }
.input-wrap input[type="password"], .input-wrap input.has-eye { padding-right: 40px; }

/* ===== CARDS ===== */
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); }
.card-header {
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}
.card-body { padding: 18px; }

/* ===== BADGES ===== */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 2px 9px;
  border-radius: 100px;
  font-size: 0.78rem;
  font-weight: 500;
  white-space: nowrap;
}
.badge-blue { background: var(--accent-light); color: var(--accent); }
.badge-green { background: var(--success-light); color: var(--success); }
.badge-red { background: var(--danger-light); color: var(--danger); }
.badge-yellow { background: var(--warning-light); color: var(--warning); }

/* ===== ALERTS ===== */
.alert {
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  border: 1px solid;
  display: flex;
  align-items: flex-start;
  gap: 8px;
}
.alert-error { background: var(--danger-light); color: var(--danger); border-color: #fecaca; }
.alert-success { background: var(--success-light); color: var(--success); border-color: #bbf7d0; }
.alert-info { background: var(--accent-light); color: var(--accent); border-color: #bfdbfe; }
.alert-warning { background: var(--warning-light); color: var(--warning); border-color: #fde68a; }

/* ===== MODAL ===== */
.modal-backdrop {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.40);
  z-index: 1000;
  align-items: flex-end;
  justify-content: center;
  padding: 0;
}
.modal-backdrop.open { display: flex; }
.modal {
  background: var(--surface);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 100%;
  max-height: 92vh;
  overflow-y: auto;
  animation: slideUp 0.22s ease;
}
@keyframes slideUp {
  from { transform: translateY(40px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}
.modal-header {
  padding: 16px 18px 12px;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  background: var(--surface);
  z-index: 1;
}
.modal-body { padding: 18px; display: flex; flex-direction: column; gap: 14px; }
.modal-footer {
  padding: 12px 18px 18px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  position: sticky;
  bottom: 0;
  background: var(--surface);
}

/* ===== NAV / TOPBAR ===== */
.topbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0 16px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: var(--shadow-sm);
}
.topbar-brand { font-size: 1rem; font-weight: 700; color: var(--accent); letter-spacing: -0.01em; }
.topbar-right { display: flex; align-items: center; gap: 10px; }
.topbar-user { font-size: 0.85rem; color: var(--text-2); }

/* ===== LAYOUT ===== */
.layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  min-height: calc(100vh - 52px);
}

/* ===== SIDEBAR ===== */
.sidebar {
  background: var(--surface);
  border-right: 1px solid var(--border);
  padding: 12px 0;
  position: sticky;
  top: 52px;
  height: calc(100vh - 52px);
  overflow-y: auto;
}
.sidebar-label { padding: 8px 14px 4px; font-size: 0.72rem; font-weight: 600; color: var(--text-3); text-transform: uppercase; letter-spacing: 0.08em; }
.sidebar-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  font-size: 0.9rem;
  color: var(--text-2);
  cursor: pointer;
  border-left: 3px solid transparent;
  transition: all 0.12s;
  user-select: none;
}
.sidebar-link:hover { background: var(--surface-2); color: var(--text); }
.sidebar-link.active { background: var(--accent-light); color: var(--accent); border-left-color: var(--accent); font-weight: 500; }
.sidebar-link svg { flex-shrink: 0; }

/* ===== MAIN CONTENT ===== */
.main { padding: 24px 28px; min-width: 0; }
.page { display: none; }
.page.active { display: block; }
.page-header { margin-bottom: 20px; }
.page-header h2 { margin-bottom: 4px; }

/* ===== TABLE ===== */
.table-wrap { overflow-x: auto; border-radius: var(--radius); border: 1px solid var(--border); -webkit-overflow-scrolling: touch; }
table { width: 100%; border-collapse: collapse; font-size: 0.88rem; }
thead { background: var(--surface-2); }
th {
  padding: 10px 12px;
  text-align: left;
  font-weight: 600;
  font-size: 0.78rem;
  color: var(--text-2);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}
td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--border);
  color: var(--text);
  vertical-align: middle;
}
tr:last-child td { border-bottom: none; }
tbody tr:hover { background: var(--surface-2); }

/* ===== ATTENDANCE GRID ===== */
.att-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(40px, 1fr)); gap: 6px; }
.att-cell {
  width: 100%;
  aspect-ratio: 1;
  border-radius: 4px;
  border: 1px solid var(--border-strong);
  background: var(--surface);
  cursor: pointer;
  font-size: 0.78rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.12s;
  user-select: none;
}
.att-cell:hover { border-color: var(--accent); background: var(--accent-light); }
.att-cell.present { background: var(--success-light); border-color: #86efac; color: var(--success); }
.att-cell.absent { background: var(--danger-light); border-color: #fca5a5; color: var(--danger); }

/* ===== STAT CARDS ===== */
.stats-row { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 14px; margin-bottom: 20px; }
.stat-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 16px 18px; box-shadow: var(--shadow-sm); }
.stat-card .stat-label { font-size: 0.78rem; color: var(--text-3); font-weight: 500; margin-bottom: 6px; text-transform: uppercase; letter-spacing: 0.05em; }
.stat-card .stat-value { font-size: 1.8rem; font-weight: 700; color: var(--text); letter-spacing: -0.03em; line-height: 1; }
.stat-card .stat-sub { font-size: 0.82rem; color: var(--text-3); margin-top: 4px; }

/* ===== PROGRESS BAR ===== */
.progress-bar { height: 8px; background: var(--surface-2); border-radius: 100px; overflow: hidden; }
.progress-fill { height: 100%; border-radius: 100px; transition: width 0.4s ease; }
.progress-fill.high { background: #22c55e; }
.progress-fill.mid { background: #f59e0b; }
.progress-fill.low { background: #ef4444; }

/* ===== DIVIDER ===== */
.divider { border: none; border-top: 1px solid var(--border); margin: 16px 0; }

/* ===== EMPTY STATE ===== */
.empty-state { text-align: center; padding: 36px 16px; color: var(--text-3); }
.empty-state p { font-size: 0.9rem; }

/* ===== TABS ===== */
.tabs { display: flex; gap: 0; border-bottom: 1px solid var(--border); margin-bottom: 18px; }
.tab-btn {
  padding: 9px 16px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-3);
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  transition: all 0.12s;
  font-family: var(--font);
  touch-action: manipulation;
}
.tab-btn:hover { color: var(--text); }
.tab-btn.active { color: var(--accent); border-bottom-color: var(--accent); }

/* ===== LOADING ===== */
.spinner {
  width: 24px; height: 24px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  flex-shrink: 0;
}
@keyframes spin { to { transform: rotate(360deg); } }
.loading-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(255,255,255,0.75);
  z-index: 9999;
  align-items: center;
  justify-content: center;
}
.loading-overlay.show { display: flex; }

/* ===== FLEX / GRID UTILITIES ===== */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-end { justify-content: flex-end; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 12px; }
.gap-4 { gap: 16px; }
.gap-5 { gap: 20px; }
.gap-6 { gap: 24px; }
.flex-wrap { flex-wrap: wrap; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }

/* ===== SPACING ===== */
.mb-1 { margin-bottom: 4px; }
.mb-2 { margin-bottom: 8px; }
.mb-3 { margin-bottom: 12px; }
.mb-4 { margin-bottom: 16px; }
.mb-5 { margin-bottom: 20px; }
.mb-6 { margin-bottom: 24px; }
.mt-1 { margin-top: 4px; }
.mt-2 { margin-top: 8px; }
.mt-3 { margin-top: 12px; }
.mt-4 { margin-top: 16px; }
.w-full { width: 100%; }

/* ===== TEXT UTILITIES ===== */
.text-sm { font-size: 0.85rem; }
.text-xs { font-size: 0.78rem; }
.text-muted { color: var(--text-3); }
.text-danger { color: var(--danger); }
.text-success { color: var(--success); }
.text-accent { color: var(--accent); }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }
.text-right { text-align: right; }
.text-center { text-align: center; }

/* ===== CHIP ===== */
.chip-group { display: flex; flex-wrap: wrap; gap: 6px; }
.chip {
  padding: 4px 12px;
  border-radius: 100px;
  font-size: 0.82rem;
  font-weight: 500;
  background: var(--surface-2);
  border: 1px solid var(--border);
  cursor: pointer;
  transition: all 0.12s;
  user-select: none;
}
.chip:hover { border-color: var(--accent); color: var(--accent); }
.chip.selected { background: var(--accent-light); border-color: var(--accent); color: var(--accent); }

/* ===== MOBILE NAV (bottom bar) ===== */
.mobile-nav {
  display: none;
  position: fixed;
  bottom: 0; left: 0; right: 0;
  background: var(--surface);
  border-top: 1px solid var(--border);
  z-index: 200;
  height: var(--mobile-nav-h);
  padding-bottom: env(safe-area-inset-bottom, 0px);
  box-shadow: 0 -2px 12px rgba(0,0,0,0.06);
}
.mobile-nav-inner { display: flex; height: 100%; }
.mobile-nav-btn {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  font-size: 0.65rem;
  color: var(--text-3);
  background: none;
  border: none;
  cursor: pointer;
  font-family: var(--font);
  transition: color 0.12s;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
  padding: 6px 4px;
}
.mobile-nav-btn.active { color: var(--accent); }
.mobile-nav-btn svg { flex-shrink: 0; }

/* ===== AUTH PAGE ===== */
.auth-root {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg);
  padding: 16px;
}
.auth-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 420px;
  padding: 28px 24px 24px;
}
.auth-logo { text-align: center; margin-bottom: 24px; }
.auth-logo h1 { font-size: 1.4rem; color: var(--accent); margin-bottom: 4px; }
.auth-logo p { font-size: 0.85rem; color: var(--text-3); }
.auth-form { display: flex; flex-direction: column; gap: 14px; }

/* ===== ROLE TABS ===== */
.role-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  overflow: hidden;
}
.role-tab {
  padding: 10px;
  text-align: center;
  font-size: 0.88rem;
  font-weight: 500;
  cursor: pointer;
  background: var(--surface);
  color: var(--text-2);
  border: none;
  font-family: var(--font);
  transition: all 0.12s;
  touch-action: manipulation;
  border-right: 1px solid var(--border-strong);
}
.role-tab:last-child { border-right: none; }
.role-tab.active { background: var(--accent); color: #fff; }

.auth-switch { text-align: center; font-size: 0.85rem; color: var(--text-3); margin-top: 8px; }
.auth-switch a { color: var(--accent); font-weight: 500; }

/* ===== COPY-ID BOX ===== */
.id-box {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 3px 8px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-2);
  cursor: pointer;
  transition: all 0.12s;
  vertical-align: middle;
}
.id-box:hover { border-color: var(--accent); color: var(--accent); }

/* ===== VERIFY BOX ===== */
.verify-box {
  text-align: center;
  padding: 20px 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}
.verify-icon {
  width: 56px; height: 56px;
  border-radius: 50%;
  background: var(--accent-light);
  display: flex;
  align-items: center;
  justify-content: center;
}
.verify-icon svg { color: var(--accent); }

/* ===== PROFILE DROPDOWN ===== */
.profile-dropdown-wrap { position: relative; }
.profile-btn {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 5px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface);
  cursor: pointer;
  font-family: var(--font);
  font-size: 0.85rem;
  color: var(--text);
  transition: all 0.12s;
  touch-action: manipulation;
}
.profile-btn:hover { background: var(--surface-2); }
.profile-avatar {
  width: 28px; height: 28px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 0.78rem;
  font-weight: 700;
  flex-shrink: 0;
}
.profile-dropdown {
  display: none;
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  min-width: 210px;
  z-index: 500;
  overflow: hidden;
}
.profile-dropdown.open { display: block; }
.profile-dropdown-header { padding: 14px 16px 10px; border-bottom: 1px solid var(--border); }
.profile-dropdown-header .pd-name { font-weight: 600; font-size: 0.92rem; color: var(--text); }
.profile-dropdown-header .pd-email { font-size: 0.78rem; color: var(--text-3); margin-top: 2px; word-break: break-all; }
.profile-dropdown-header .pd-role { margin-top: 6px; }
.profile-dropdown-item {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 16px;
  font-size: 0.88rem; color: var(--text-2);
  cursor: pointer; transition: background 0.1s;
  border: none; background: none; width: 100%;
  font-family: var(--font); text-align: left;
  touch-action: manipulation;
}
.profile-dropdown-item:hover { background: var(--surface-2); color: var(--text); }
.profile-dropdown-item.danger { color: var(--danger); }
.profile-dropdown-item.danger:hover { background: var(--danger-light); }

/* ===== LINK-ROLL BOX (student) ===== */
.link-roll-box {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  margin-bottom: 20px;
}

/* ===== SUBJECT ATTENDANCE CARD (student) ===== */
.subject-att-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  margin-bottom: 16px;
}
.subject-att-head {
  padding: 14px 16px;
  background: var(--surface-2);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  user-select: none;
  touch-action: manipulation;
}
.subject-att-head:hover { background: #ebebea; }
.subject-att-body { padding: 16px; }

/* ===== PCT CIRCLE ===== */
.pct-circle {
  display: flex; align-items: center; justify-content: center;
  width: 58px; height: 58px;
  border-radius: 50%;
  font-size: 1rem; font-weight: 700;
  flex-shrink: 0;
}
.pct-high { background: var(--success-light); color: var(--success); border: 2px solid #86efac; }
.pct-mid { background: var(--warning-light); color: var(--warning); border: 2px solid #fde68a; }
.pct-low { background: var(--danger-light); color: var(--danger); border: 2px solid #fca5a5; }

/* ===== MONTH ROW ===== */
.month-row {
  display: flex; align-items: center; gap: 10px;
  padding: 8px 0; border-bottom: 1px solid var(--border);
}
.month-row:last-child { border-bottom: none; }
.month-label { width: 80px; font-size: 0.83rem; font-weight: 500; flex-shrink: 0; }
.month-bar { flex: 1; }
.month-pct { width: 44px; text-align: right; font-size: 0.83rem; font-weight: 600; flex-shrink: 0; }

/* ===== DATE CHIP ===== */
.date-list { display: flex; flex-wrap: wrap; gap: 5px; margin-top: 8px; }
.date-chip { padding: 3px 9px; border-radius: 100px; font-size: 0.76rem; font-weight: 500; border: 1px solid; }
.date-chip.P { background: var(--success-light); color: var(--success); border-color: #86efac; }
.date-chip.A { background: var(--danger-light); color: var(--danger); border-color: #fca5a5; }

/* ===== OVERVIEW CARD ===== */
.overview-card {
  background: var(--accent);
  color: #fff;
  border-radius: var(--radius-lg);
  padding: 20px;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.overview-card .overview-left h2 { color: #fff; font-size: 1rem; margin-bottom: 2px; }
.overview-card .overview-left p { color: rgba(255,255,255,0.75); font-size: 0.82rem; }
.overview-big-pct { font-size: 2.6rem; font-weight: 700; line-height: 1; letter-spacing: -0.04em; color: #fff; }
.overview-sub { font-size: 0.78rem; color: rgba(255,255,255,0.7); margin-top: 3px; }

/* ===== TOGGLE CHEVRON ===== */
.toggle-chevron { transition: transform 0.2s; flex-shrink: 0; }
.toggle-chevron.open { transform: rotate(180deg); }

/* ===== CLASS CARD ===== */
.class-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: box-shadow 0.15s;
}
.class-card:hover { box-shadow: var(--shadow); }
.class-card-head {
  padding: 12px 16px;
  background: var(--surface-2);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
}
.class-card-body { padding: 12px 16px; }
.classes-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 16px; }

/* ===== DIV ROW ===== */
.div-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  padding: 10px 0;
  border-bottom: 1px solid var(--border);
  gap: 10px;
  flex-wrap: wrap;
}
.div-row:last-child { border-bottom: none; }

/* ===== ATT MARK GRID ===== */
.att-mark-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(68px, 1fr)); gap: 8px; }
.att-mark-cell {
  border: 1.5px solid var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 8px 4px;
  text-align: center;
  cursor: pointer;
  user-select: none;
  transition: all 0.12s;
  touch-action: manipulation;
}
.att-mark-cell .roll-num { font-size: 0.76rem; font-weight: 600; color: var(--text-3); margin-bottom: 4px; }
.att-mark-cell .status-badge { font-size: 0.82rem; font-weight: 600; padding: 2px 8px; border-radius: 100px; }
.att-mark-cell.present { background: var(--success-light); border-color: #86efac; }
.att-mark-cell.present .status-badge { background: #dcfce7; color: var(--success); }
.att-mark-cell.absent { background: var(--danger-light); border-color: #fca5a5; }
.att-mark-cell.absent .status-badge { background: #fee2e2; color: var(--danger); }
.att-mark-cell:active { transform: scale(0.96); }

/* ===========================
   RESPONSIVE — MOBILE FIRST
   =========================== */

/* ---- Tablets (768px and below) ---- */
@media (max-width: 768px) {
  .layout { grid-template-columns: 1fr; }
  .sidebar { display: none; }
  .mobile-nav { display: flex; }
  body { padding-bottom: calc(var(--mobile-nav-h) + env(safe-area-inset-bottom, 0px)); }
  .main { padding: 14px 14px 20px; }
  #profileBtnName { display: none; }
  .topbar { padding: 0 12px; }
  .page-header.flex { flex-direction: column; align-items: flex-start; gap: 10px; }
  .grid-2 { grid-template-columns: 1fr; }
  .grid-3 { grid-template-columns: 1fr 1fr; }
  .classes-grid { grid-template-columns: 1fr; }
  .stats-row { grid-template-columns: 1fr 1fr; }
  .card-header { flex-wrap: wrap; gap: 8px; }
  .card-body { padding: 14px; }
  h1 { font-size: 1.3rem; }
  h2 { font-size: 1.15rem; }
  .auth-box { padding: 22px 18px 20px; border-radius: var(--radius-lg); }
  .modal { border-radius: var(--radius-lg) var(--radius-lg) 0 0; }
  .modal-footer { flex-direction: row; }
  .modal-footer .btn { flex: 1; justify-content: center; }
  .table-wrap { font-size: 0.82rem; }
  th, td { padding: 8px 10px; }
  .overview-card { flex-direction: column; align-items: flex-start; gap: 12px; }
  .overview-big-pct { font-size: 2.2rem; }
  .att-mark-grid { grid-template-columns: repeat(auto-fill, minmax(58px, 1fr)); gap: 6px; }
  .subject-att-head { padding: 12px 14px; }
  .subject-att-body { padding: 14px; }
  .pct-circle { width: 50px; height: 50px; font-size: 0.9rem; }
  .month-label { width: 68px; font-size: 0.78rem; }
  .month-pct { width: 40px; font-size: 0.78rem; }
  .div-row > div:last-child { width: 100%; justify-content: flex-end; }
  .class-card-head { flex-wrap: wrap; }
}

/* ---- Small phones (480px and below) ---- */
@media (max-width: 480px) {
  .stats-row { grid-template-columns: 1fr; }
  .grid-3 { grid-template-columns: 1fr; }
  .btn { font-size: 0.85rem; padding: 8px 14px; }
  .btn-sm { font-size: 0.78rem; padding: 6px 10px; }
  .modal-footer { flex-direction: column-reverse; gap: 8px; }
  .modal-footer .btn { width: 100%; justify-content: center; }
  .att-mark-grid { grid-template-columns: repeat(auto-fill, minmax(52px, 1fr)); gap: 5px; }
  .overview-big-pct { font-size: 2rem; }
  th, td { padding: 7px 8px; font-size: 0.78rem; }
  .auth-box { padding: 18px 14px 16px; }
}