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

:root {
  --bg-primary:    #0f1117;
  --bg-secondary:  #161923;
  --bg-card:       #1e2235;
  --bg-input:      #252a3d;
  --bg-hover:      #2a2f45;
  --border:        #343956;
  --border-focus:  #5b7cf8;
  --accent:        #4f7ef8;
  --accent-hover:  #3a6ae8;
  --accent-dim:    rgba(79,126,248,0.15);
  --text-primary:  #e4e8f5;
  --text-secondary:#8b93bb;
  --text-muted:    #555d7a;
  --success:       #22c55e;
  --success-dim:   rgba(34,197,94,0.12);
  --danger:        #ef4444;
  --danger-dim:    rgba(239,68,68,0.15);
  --warning:       #f59e0b;
  --warning-dim:   rgba(245,158,11,0.15);
  --radius:        8px;
  --radius-lg:     12px;
  --radius-xl:     16px;
  --shadow:        0 4px 24px rgba(0,0,0,0.4);
  --shadow-sm:     0 2px 8px rgba(0,0,0,0.3);
  --transition:    0.18s ease;
}

html { scroll-behavior: smooth; }
body { background: var(--bg-primary); color: var(--text-primary); font-family: 'Segoe UI', system-ui, -apple-system, sans-serif; font-size: 14px; line-height: 1.6; min-height: 100vh; }

/* ── Scrollbar ─────────────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg-secondary); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* ── Typography ────────────────────────────────────────────────────── */
h1 { font-size: 1.6rem; font-weight: 700; letter-spacing: -0.3px; }
h2 { font-size: 1.2rem; font-weight: 600; }
h3 { font-size: 1rem; font-weight: 600; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ── Layout ────────────────────────────────────────────────────────── */
.container { max-width: 1200px; margin: 0 auto; padding: 0 16px; }

/* ── Header / Navbar ───────────────────────────────────────────────── */
.navbar {
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 100;
}
.navbar-inner {
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px 20px; max-width: 1200px; margin: 0 auto;
}
.navbar-brand { font-size: 1.1rem; font-weight: 700; color: var(--accent); display: flex; align-items: center; gap: 8px; }
.navbar-brand svg { width: 22px; height: 22px; }
.navbar-actions { display: flex; align-items: center; gap: 10px; }
.navbar-user { color: var(--text-secondary); font-size: 0.85rem; }

/* ── Card ──────────────────────────────────────────────────────────── */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 20px;
  box-shadow: var(--shadow-sm);
}

/* ── Form elements ─────────────────────────────────────────────────── */
.form-group { display: flex; flex-direction: column; gap: 5px; }
.form-label { font-size: 0.82rem; font-weight: 500; color: var(--text-secondary); text-transform: uppercase; letter-spacing: 0.5px; }

input[type="text"],
input[type="password"],
input[type="date"],
select,
textarea {
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text-primary);
  font-size: 0.92rem;
  padding: 9px 12px;
  width: 100%;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}
input[type="text"]:focus,
input[type="password"]:focus,
input[type="date"]:focus,
select:focus { border-color: var(--border-focus); box-shadow: 0 0 0 3px rgba(79,126,248,0.18); }

select option { background: var(--bg-input); color: var(--text-primary); }
input[type="date"]::-webkit-calendar-picker-indicator { filter: invert(0.7); cursor: pointer; }

/* Arabic input */
.input-arabic { direction: rtl; font-size: 1rem; }

/* Slider */
.slider-wrapper { display: flex; flex-direction: column; gap: 4px; }
.slider-display { display: flex; justify-content: space-between; align-items: center; }
.slider-value { font-size: 1.1rem; font-weight: 700; color: var(--accent); min-width: 52px; text-align: right; }
input[type="range"] {
  -webkit-appearance: none; appearance: none;
  width: 100%; height: 5px;
  background: var(--border); border-radius: 3px; outline: none; cursor: pointer;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none;
  width: 20px; height: 20px; border-radius: 50%;
  background: var(--accent); cursor: pointer; border: 2px solid var(--bg-card);
  box-shadow: 0 0 0 2px var(--accent);
  transition: transform var(--transition);
}
input[type="range"]::-webkit-slider-thumb:hover { transform: scale(1.2); }
input[type="range"]::-moz-range-thumb {
  width: 18px; height: 18px; border-radius: 50%;
  background: var(--accent); cursor: pointer; border: 2px solid var(--bg-card);
}

/* Checkbox */
.checkbox-label { display: flex; align-items: center; gap: 8px; cursor: pointer; font-size: 0.88rem; color: var(--text-secondary); }
input[type="checkbox"] { width: 16px; height: 16px; accent-color: var(--accent); cursor: pointer; }

/* ── Buttons ────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 8px 16px; border-radius: var(--radius); border: none;
  font-size: 0.88rem; font-weight: 600; cursor: pointer;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  white-space: nowrap;
}
.btn:active { transform: scale(0.97); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); }

.btn-secondary { background: var(--bg-hover); color: var(--text-primary); border: 1px solid var(--border); }
.btn-secondary:hover { background: var(--bg-input); }

.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: #dc2626; }

.btn-danger-outline { background: var(--danger-dim); color: var(--danger); border: 1px solid var(--danger); }
.btn-danger-outline:hover { background: var(--danger); color: #fff; }

.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { background: #16a34a; }

.btn-sm { padding: 5px 10px; font-size: 0.8rem; }
.btn-icon { padding: 6px; border-radius: var(--radius); background: var(--bg-hover); border: 1px solid var(--border); color: var(--text-secondary); cursor: pointer; display: inline-flex; align-items: center; transition: background var(--transition), color var(--transition); }
.btn-icon:hover { background: var(--bg-input); color: var(--text-primary); }
.btn-full { width: 100%; }

/* ── Badges / Status ────────────────────────────────────────────────── */
.status-dot {
  display: inline-block; width: 9px; height: 9px; border-radius: 50%;
  flex-shrink: 0;
}
.status-dot.active { background: var(--success); box-shadow: 0 0 6px var(--success); }
.status-dot.inactive { background: var(--text-muted); }
.status-dot.checking { background: var(--warning); animation: pulse 1s infinite; }

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.badge {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 3px 9px; border-radius: 20px; font-size: 0.75rem; font-weight: 600;
}
.badge-active { background: var(--success-dim); color: var(--success); }
.badge-inactive { background: var(--bg-hover); color: var(--text-muted); }
.badge-checking { background: var(--warning-dim); color: var(--warning); }

/* ── Alert / Messages ───────────────────────────────────────────────── */
.alert { padding: 10px 14px; border-radius: var(--radius); font-size: 0.88rem; margin-bottom: 12px; }
.alert-error { background: var(--danger-dim); color: var(--danger); border: 1px solid var(--danger); }
.alert-success { background: var(--success-dim); color: var(--success); border: 1px solid var(--success); }
.hidden { display: none !important; }

/* ── Table (admin/history still uses tables) ────────────────────────── */
.table-wrap { overflow-x: auto; border-radius: var(--radius-lg); border: 1px solid var(--border); }
table { width: 100%; border-collapse: collapse; min-width: 500px; }
thead { background: var(--bg-secondary); }
th { padding: 11px 14px; text-align: left; font-size: 0.78rem; font-weight: 600; color: var(--text-secondary); text-transform: uppercase; letter-spacing: 0.5px; white-space: nowrap; border-bottom: 1px solid var(--border); }
td { padding: 11px 14px; border-bottom: 1px solid var(--border); vertical-align: middle; }
tr:last-child td { border-bottom: none; }
tr:hover td { background: var(--bg-hover); }

/* ── Student Cards ──────────────────────────────────────────────────── */
.students-grid { display: flex; flex-direction: column; gap: 10px; }

.student-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.student-card:hover { border-color: var(--border-focus); box-shadow: var(--shadow-sm); }
.student-card.student-active { border-left: 3px solid var(--success); background: rgba(34,197,94,0.03); }
.student-card.student-inactive { opacity: 0.65; border-left: 3px solid var(--text-muted); }

/* Single data row: id · names · year · grade · badge */
.sc-row {
  display: flex; align-items: flex-start; gap: 10px;
  padding: 10px 14px;
}
.sc-id {
  flex-shrink: 0; font-size: 0.75rem; color: var(--text-muted);
  font-weight: 600; padding-top: 2px; min-width: 28px;
}
.sc-names {
  flex: 1; min-width: 0;
  display: flex; flex-direction: row; align-items: baseline; gap: 10px; flex-wrap: wrap;
}
.sc-name-en {
  font-size: 0.9rem; font-weight: 700; color: var(--text-primary);
  display: -webkit-box; -webkit-line-clamp: 2; line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.sc-name-ar {
  font-size: 0.84rem; color: var(--text-secondary);
  display: -webkit-box; -webkit-line-clamp: 2; line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.sc-meta {
  flex-shrink: 0; display: flex; flex-direction: column; align-items: flex-end;
  gap: 1px; padding-top: 1px;
}
.sc-meta-val  { font-size: 0.82rem; font-weight: 700; color: var(--text-primary); white-space: nowrap; }
.sc-meta-lbl  { font-size: 0.62rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.3px; }

/* ── Student action bar ─────────────────────────────────────────────── */
.sc-actions {
  display: flex; align-items: center; justify-content: space-around;
  padding: 8px 10px;
  border-top: 1px solid var(--border);
  background: var(--bg-secondary);
  gap: 4px;
}

.sc-btn {
  flex: 1;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 3px;
  padding: 7px 4px;
  border: none; border-radius: var(--radius); background: transparent;
  color: var(--text-secondary); cursor: pointer; font-size: 0.68rem; font-weight: 500;
  transition: background var(--transition), color var(--transition);
  min-width: 0;
}
.sc-btn svg { flex-shrink: 0; }
.sc-btn:hover:not(:disabled) { background: var(--bg-hover); color: var(--text-primary); }
.sc-btn:active:not(:disabled) { transform: scale(0.95); }

.sc-btn-refresh:hover:not(:disabled) { color: var(--accent);   background: var(--accent-dim); }
.sc-btn-edit:hover:not(:disabled)    { color: var(--accent);   background: var(--accent-dim); }
.sc-btn-delete:hover:not(:disabled)  { color: var(--danger);   background: var(--danger-dim); }
.sc-btn-view:hover:not(:disabled)    { color: var(--success);  background: var(--success-dim); }
.sc-btn-dl:hover:not(:disabled)      { color: var(--warning);  background: var(--warning-dim); }
.sc-btn-data:hover:not(:disabled)    { color: var(--accent);   background: var(--accent-dim); }

.sc-btn:disabled {
  opacity: 0.3; cursor: not-allowed;
}

/* ── Certificate modal image ────────────────────────────────────────── */
.cert-img-wrap { text-align: center; padding: 8px 0; }
.cert-img-wrap img { max-width: 100%; border-radius: var(--radius); border: 1px solid var(--border); }
.cert-loading { text-align: center; padding: 60px 20px; color: var(--text-secondary); }
.cert-error { text-align: center; padding: 40px 20px; color: var(--danger); }

/* ── Full data viewer ───────────────────────────────────────────────── */
.fdata-section { margin-bottom: 18px; }
.fdata-section-title {
  font-size: 0.72rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.6px;
  color: var(--accent); margin-bottom: 8px; padding-bottom: 5px;
  border-bottom: 1px solid var(--border);
}
.fdata-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 6px;
}
.fdata-grid.fdata-grid-1 { grid-template-columns: 1fr; }
.fdata-row {
  display: flex; flex-direction: column; gap: 2px;
  background: var(--bg-input); border-radius: var(--radius); padding: 7px 10px;
}
.fdata-key   { font-size: 0.69rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.4px; }
.fdata-value { font-size: 0.88rem; color: var(--text-primary); font-weight: 500; word-break: break-all; }
.fdata-value.rtl { direction: rtl; }
.fdata-value.mono { font-family: 'Consolas', 'Courier New', monospace; font-size: 0.78rem; }
@media (max-width: 480px) { .fdata-grid { grid-template-columns: 1fr; } }

/* ── Counters bar ───────────────────────────────────────────────────── */
.counters { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 16px; }
.counter-box {
  flex: 1; min-width: 100px;
  background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius-lg);
  padding: 14px 16px; text-align: center;
}
.counter-value { font-size: 1.8rem; font-weight: 700; line-height: 1; }
.counter-label { font-size: 0.78rem; color: var(--text-secondary); margin-top: 4px; text-transform: uppercase; letter-spacing: 0.5px; }
.counter-total .counter-value { color: var(--accent); }
.counter-active .counter-value { color: var(--success); }
.counter-inactive .counter-value { color: var(--text-muted); }

/* ── Pagination ─────────────────────────────────────────────────────── */
.pagination { display: flex; align-items: center; justify-content: center; gap: 6px; margin-top: 16px; flex-wrap: wrap; }
.page-btn {
  width: 34px; height: 34px; border-radius: var(--radius); border: 1px solid var(--border);
  background: var(--bg-card); color: var(--text-secondary); cursor: pointer;
  font-size: 0.85rem; font-weight: 500; display: flex; align-items: center; justify-content: center;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}
.page-btn:hover { background: var(--bg-hover); color: var(--text-primary); border-color: var(--border-focus); }
.page-btn.active { background: var(--accent); color: #fff; border-color: var(--accent); }
.page-btn:disabled { opacity: 0.4; cursor: not-allowed; }
.page-info { font-size: 0.82rem; color: var(--text-secondary); padding: 0 6px; }

/* ── Modal ──────────────────────────────────────────────────────────── */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,0.7);
  display: flex; align-items: center; justify-content: center;
  z-index: 1000; padding: 16px;
  backdrop-filter: blur(4px);
}
.modal-box {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-xl); padding: 24px; width: 100%; max-width: 540px;
  box-shadow: var(--shadow); max-height: 90vh; overflow-y: auto;
}
.modal-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 20px; }
.modal-title { font-size: 1.1rem; font-weight: 700; }
.modal-close { background: none; border: none; color: var(--text-secondary); cursor: pointer; font-size: 1.3rem; line-height: 1; padding: 4px; border-radius: 4px; }
.modal-close:hover { color: var(--text-primary); background: var(--bg-hover); }
.modal-footer { display: flex; gap: 10px; justify-content: flex-end; margin-top: 20px; }

/* ── Form grid ──────────────────────────────────────────────────────── */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.form-grid .form-group.full { grid-column: 1 / -1; }
@media (max-width: 540px) { .form-grid { grid-template-columns: 1fr; } }

/* ── Sign in page ───────────────────────────────────────────────────── */
.signin-page {
  min-height: 100vh; display: flex; align-items: center; justify-content: center;
  background: radial-gradient(ellipse at 30% 20%, rgba(79,126,248,0.08) 0%, transparent 60%),
              var(--bg-primary);
  padding: 20px;
}
.signin-card { width: 100%; max-width: 400px; }
.signin-logo { text-align: center; margin-bottom: 28px; }
.signin-logo h1 { font-size: 1.4rem; color: var(--accent); }
.signin-logo p { color: var(--text-secondary); font-size: 0.85rem; margin-top: 4px; }
.signin-form { display: flex; flex-direction: column; gap: 16px; }

/* ── Dashboard layout ───────────────────────────────────────────────── */
.page-main { padding: 20px; max-width: 1200px; margin: 0 auto; }
.page-section { margin-bottom: 24px; }
.section-title { font-size: 0.95rem; font-weight: 700; color: var(--text-secondary); text-transform: uppercase; letter-spacing: 0.7px; margin-bottom: 14px; display: flex; align-items: center; gap: 8px; }
.section-title::after { content: ''; flex: 1; height: 1px; background: var(--border); }

/* ── Toolbar ────────────────────────────────────────────────────────── */
.toolbar { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 14px; }
.toolbar-right { margin-left: auto; display: flex; gap: 8px; }

/* ── Spinner ────────────────────────────────────────────────────────── */
.spinner {
  display: inline-block; width: 14px; height: 14px;
  border: 2px solid rgba(255,255,255,0.3); border-top-color: #fff;
  border-radius: 50%; animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── Tabs ───────────────────────────────────────────────────────────── */
.tabs { display: flex; gap: 4px; margin-bottom: 20px; border-bottom: 1px solid var(--border); }
.tab-btn {
  padding: 10px 18px; border: none; background: none; color: var(--text-secondary);
  cursor: pointer; font-size: 0.9rem; font-weight: 500; border-bottom: 2px solid transparent;
  margin-bottom: -1px; transition: color var(--transition), border-color var(--transition);
}
.tab-btn:hover { color: var(--text-primary); }
.tab-btn.active { color: var(--accent); border-bottom-color: var(--accent); }
.tab-panel { display: none; }
.tab-panel.active { display: block; }

/* ── Empty state ────────────────────────────────────────────────────── */
.empty-state { text-align: center; padding: 40px 20px; color: var(--text-muted); }
.empty-state svg { width: 48px; height: 48px; margin-bottom: 12px; opacity: 0.4; }
.empty-state p { font-size: 0.9rem; }

/* ── Confirm delete 2-step ──────────────────────────────────────────── */
.delete-confirm-1, .delete-confirm-2 { display: flex; gap: 5px; align-items: center; }

/* ── History table ──────────────────────────────────────────────────── */
.action-badge {
  display: inline-block; padding: 2px 8px; border-radius: 12px; font-size: 0.75rem; font-weight: 600;
}
.action-add { background: var(--success-dim); color: var(--success); }
.action-edit { background: var(--accent-dim); color: var(--accent); }
.action-delete { background: var(--danger-dim); color: var(--danger); }
.action-login { background: var(--warning-dim); color: var(--warning); }
.action-logout { background: var(--bg-hover); color: var(--text-muted); }
.action-add_user { background: var(--success-dim); color: var(--success); }
.action-edit_user { background: var(--accent-dim); color: var(--accent); }
.action-delete_user { background: var(--danger-dim); color: var(--danger); }

/* ── Responsive adjustments ─────────────────────────────────────────── */
@media (max-width: 768px) {
  .navbar-inner { padding: 10px 14px; }
  .page-main { padding: 14px; }
  .counters { gap: 8px; }
  .counter-box { padding: 10px 12px; }
  .counter-value { font-size: 1.4rem; }
  .modal-box { padding: 18px; }
  th, td { padding: 9px 10px; }
  .btn { padding: 7px 12px; }
  .sc-btn { font-size: 0.65rem; padding: 6px 2px; }
}

@media (max-width: 480px) {
  h1 { font-size: 1.3rem; }
  .counter-box { min-width: 80px; }
  .navbar-user { display: none; }
  .btn-sm { padding: 4px 8px; font-size: 0.75rem; }
  .sc-btn { font-size: 0.62rem; }
}