@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@300;400;500;600&family=DM+Mono:wght@400;500&display=swap');

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --sidebar-w: 240px;
  --navy:      #0d1b2a;
  --navy2:     #162233;
  --navy3:     #1e3048;
  --orange:    #e85d04;
  --orange2:   #f48c06;
  --white:     #ffffff;
  --bg:        #f0f2f5;
  --card:      #ffffff;
  --text:      #1a2332;
  --muted:     #64748b;
  --border:    #e2e8f0;
  --success:   #16a34a;
  --danger:    #dc2626;
  --warning:   #d97706;
  --info:      #0284c7;
  --radius:    10px;
  --shadow:    0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);
  --shadow-lg: 0 4px 16px rgba(0,0,0,.12);
}

html, body { height: 100%; font-family: 'DM Sans', sans-serif; font-size: 14px; color: var(--text); background: var(--bg); }

/* ─── Layout ────────────────────────────────────────────────────────────── */
#app { display: flex; height: 100vh; overflow: hidden; }

/* ─── Sidebar ───────────────────────────────────────────────────────────── */
#sidebar {
  width: var(--sidebar-w);
  background: var(--navy);
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  overflow-y: auto;
  position: relative;
  transition: width .25s;
}
#sidebar::after {
  content: '';
  position: absolute;
  top: 0; right: 0;
  width: 1px; height: 100%;
  background: linear-gradient(to bottom, transparent, var(--orange), transparent);
  opacity: .3;
}
.sidebar-brand {
  padding: 24px 20px 18px;
  border-bottom: 1px solid rgba(255,255,255,.06);
}
.sidebar-brand .logo-mark {
  display: flex; align-items: center; gap: 10px;
}
.sidebar-brand .logo-box {
  width: 34px; height: 34px;
  background: var(--orange);
  border-radius: 6px;
  display: flex; align-items: center; justify-content: center;
  font-family: 'DM Mono', monospace;
  font-weight: 500;
  font-size: 13px;
  color: #fff;
  letter-spacing: .05em;
}
.sidebar-brand .logo-text {
  font-size: 15px; font-weight: 600;
  color: #fff; letter-spacing: .02em;
  line-height: 1.2;
}
.sidebar-brand .logo-sub {
  font-size: 10px; color: rgba(255,255,255,.4);
  letter-spacing: .08em; text-transform: uppercase;
  margin-top: 2px;
}

.nav-section { padding: 14px 0 4px; }
.nav-section-label {
  padding: 0 20px 6px;
  font-size: 10px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: rgba(255,255,255,.28);
  font-weight: 500;
}
.nav-item {
  display: flex; align-items: center; gap: 10px;
  padding: 9px 20px;
  color: rgba(255,255,255,.55);
  cursor: pointer;
  border-left: 2px solid transparent;
  transition: all .15s;
  font-size: 13.5px;
  user-select: none;
}
.nav-item:hover { color: rgba(255,255,255,.9); background: rgba(255,255,255,.04); }
.nav-item.active {
  color: #fff;
  background: rgba(232,93,4,.12);
  border-left-color: var(--orange);
}
.nav-item svg { flex-shrink: 0; opacity: .7; }
.nav-item.active svg { opacity: 1; }

.sidebar-user {
  margin-top: auto;
  padding: 14px 20px;
  border-top: 1px solid rgba(255,255,255,.06);
  display: flex; align-items: center; gap: 10px;
}
.sidebar-user .avatar {
  width: 30px; height: 30px; border-radius: 50%;
  background: var(--orange);
  display: flex; align-items: center; justify-content: center;
  font-size: 11px; font-weight: 600; color: #fff; flex-shrink: 0;
}
.sidebar-user .user-info { overflow: hidden; }
.sidebar-user .user-name { color: rgba(255,255,255,.85); font-size: 12px; font-weight: 500; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.sidebar-user .user-role { color: rgba(255,255,255,.35); font-size: 10px; font-family: 'DM Mono', monospace; letter-spacing: .05em; text-transform: uppercase; }
.sidebar-user .logout-btn { margin-left: auto; cursor: pointer; color: rgba(255,255,255,.3); flex-shrink: 0; }
.sidebar-user .logout-btn:hover { color: var(--orange); }

/* ─── Main ──────────────────────────────────────────────────────────────── */
#main { flex: 1; display: flex; flex-direction: column; overflow: hidden; }

#topbar {
  height: 56px; min-height: 56px;
  background: var(--white);
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center;
  padding: 0 24px;
  gap: 16px;
}
#topbar h1 { font-size: 16px; font-weight: 600; color: var(--text); }
#topbar .topbar-actions { margin-left: auto; display: flex; gap: 8px; align-items: center; }

#content {
  flex: 1;
  overflow-y: auto;
  padding: 24px;
}

/* ─── Cards ─────────────────────────────────────────────────────────────── */
.card {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}
.card-header {
  padding: 16px 20px;
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; gap: 12px;
}
.card-header h2 { font-size: 14px; font-weight: 600; flex: 1; }
.card-body { padding: 20px; }

/* ─── Stats grid ─────────────────────────────────────────────────────────── */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
  gap: 16px;
  margin-bottom: 24px;
}
.stat-card {
  background: var(--card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  padding: 18px 20px;
  display: flex; flex-direction: column; gap: 6px;
  cursor: pointer; transition: box-shadow .15s, transform .15s;
}
.stat-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-1px); }
.stat-card .stat-label { font-size: 11px; text-transform: uppercase; letter-spacing: .07em; color: var(--muted); font-weight: 500; }
.stat-card .stat-value { font-size: 28px; font-weight: 300; color: var(--text); font-family: 'DM Mono', monospace; }
.stat-card .stat-icon { font-size: 18px; color: var(--orange); margin-bottom: 4px; }

/* ─── Table ─────────────────────────────────────────────────────────────── */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
th {
  text-align: left;
  padding: 10px 14px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--muted);
  border-bottom: 2px solid var(--border);
  white-space: nowrap;
}
td { padding: 12px 14px; border-bottom: 1px solid var(--border); vertical-align: middle; }
tr:last-child td { border-bottom: 0; }
tr:hover td { background: #fafafa; }
.actions-td { white-space: nowrap; display: flex; gap: 6px; align-items: center; }
.mono { font-family: 'DM Mono', monospace; font-size: 12px; color: var(--muted); }

/* ─── Buttons ───────────────────────────────────────────────────────────── */
.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 16px;
  border-radius: 7px;
  border: none; cursor: pointer;
  font-family: 'DM Sans', sans-serif;
  font-size: 13px; font-weight: 500;
  transition: all .15s;
  white-space: nowrap;
}
.btn-primary { background: var(--orange); color: #fff; }
.btn-primary:hover { background: #c94d00; }
.btn-secondary { background: var(--bg); color: var(--text); border: 1px solid var(--border); }
.btn-secondary:hover { background: var(--border); }
.btn-danger { background: #fee2e2; color: var(--danger); }
.btn-danger:hover { background: #fecaca; }
.btn-success { background: #dcfce7; color: var(--success); }
.btn-success:hover { background: #bbf7d0; }
.btn-sm { padding: 5px 10px; font-size: 12px; border-radius: 6px; }
.btn-icon { width: 30px; height: 30px; padding: 0; justify-content: center; border-radius: 6px; }

/* ─── Badges ────────────────────────────────────────────────────────────── */
.badge {
  display: inline-flex; align-items: center;
  padding: 3px 8px; border-radius: 20px;
  font-size: 11px; font-weight: 500; letter-spacing: .03em;
  font-family: 'DM Mono', monospace; text-transform: uppercase;
}
.badge-success  { background: #dcfce7; color: #166534; }
.badge-danger   { background: #fee2e2; color: #991b1b; }
.badge-warning  { background: #fef9c3; color: #854d0e; }
.badge-info     { background: #dbeafe; color: #1e40af; }
.badge-gray     { background: #f1f5f9; color: #475569; }
.badge-orange   { background: #fff7ed; color: #c2410c; }

/* ─── Forms ─────────────────────────────────────────────────────────────── */
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-grid.cols-3 { grid-template-columns: 1fr 1fr 1fr; }
.form-grid.cols-1 { grid-template-columns: 1fr; }
.form-group { display: flex; flex-direction: column; gap: 5px; }
.form-group.span-2 { grid-column: 1 / -1; }
label { font-size: 12px; font-weight: 500; color: var(--muted); text-transform: uppercase; letter-spacing: .05em; }
input[type=text], input[type=email], input[type=number], input[type=date], input[type=datetime-local], input[type=password], select, textarea {
  padding: 9px 12px;
  border: 1px solid var(--border);
  border-radius: 7px;
  font-family: 'DM Sans', sans-serif;
  font-size: 13.5px;
  color: var(--text);
  background: var(--white);
  transition: border-color .15s, box-shadow .15s;
  outline: none;
  width: 100%;
}
input:focus, select:focus, textarea:focus {
  border-color: var(--orange);
  box-shadow: 0 0 0 3px rgba(232,93,4,.12);
}
textarea { resize: vertical; min-height: 80px; }
select { cursor: pointer; }
.form-hint { font-size: 11px; color: var(--muted); margin-top: 2px; }
.form-actions { display: flex; gap: 10px; margin-top: 20px; padding-top: 16px; border-top: 1px solid var(--border); }

/* ─── Search bar ─────────────────────────────────────────────────────────── */
.search-wrap { display: flex; gap: 10px; align-items: center; margin-bottom: 16px; }
.search-input-wrap { position: relative; flex: 1; max-width: 340px; }
.search-input-wrap svg { position: absolute; left: 10px; top: 50%; transform: translateY(-50%); color: var(--muted); pointer-events: none; }
.search-input-wrap input { padding-left: 34px; }

/* ─── Modal ─────────────────────────────────────────────────────────────── */
.modal-bg {
  position: fixed; inset: 0;
  background: rgba(0,0,0,.45);
  z-index: 100;
  display: flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none;
  transition: opacity .2s;
}
.modal-bg.open { opacity: 1; pointer-events: all; }
.modal {
  background: var(--white);
  border-radius: 14px;
  box-shadow: var(--shadow-lg);
  width: 580px; max-width: 95vw; max-height: 88vh;
  display: flex; flex-direction: column;
  transform: translateY(16px);
  transition: transform .2s;
}
.modal-bg.open .modal { transform: translateY(0); }
.modal.modal-lg { width: 860px; }
.modal-header {
  padding: 18px 22px;
  border-bottom: 1px solid var(--border);
  display: flex; align-items: center; justify-content: space-between;
  flex-shrink: 0;
}
.modal-header h3 { font-size: 15px; font-weight: 600; }
.modal-close { cursor: pointer; color: var(--muted); border: none; background: none; font-size: 20px; line-height: 1; }
.modal-body { padding: 22px; overflow-y: auto; flex: 1; }
.modal-footer { padding: 14px 22px; border-top: 1px solid var(--border); display: flex; justify-content: flex-end; gap: 8px; flex-shrink: 0; }

/* ─── Toast ─────────────────────────────────────────────────────────────── */
#toast-container { position: fixed; bottom: 24px; right: 24px; z-index: 999; display: flex; flex-direction: column; gap: 8px; }
.toast {
  background: var(--navy);
  color: #fff;
  padding: 12px 18px;
  border-radius: 9px;
  font-size: 13px;
  min-width: 220px;
  max-width: 360px;
  display: flex; align-items: center; gap: 10px;
  box-shadow: var(--shadow-lg);
  animation: toast-in .2s ease;
  border-left: 3px solid var(--orange);
}
.toast.success { border-left-color: var(--success); }
.toast.error   { border-left-color: var(--danger); }
@keyframes toast-in { from { opacity:0; transform: translateX(20px); } to { opacity:1; transform: translateX(0); } }

/* ─── Accordion (for sections/questions) ────────────────────────────────── */
.accordion-item { border: 1px solid var(--border); border-radius: 8px; margin-bottom: 8px; overflow: hidden; }
.accordion-header {
  padding: 12px 16px;
  display: flex; align-items: center; gap: 10px;
  cursor: pointer;
  background: #fafafa;
  font-weight: 500;
  user-select: none;
}
.accordion-header:hover { background: #f1f5f9; }
.accordion-arrow { margin-left: auto; transition: transform .2s; }
.accordion-item.open .accordion-arrow { transform: rotate(180deg); }
.accordion-body { padding: 12px 16px; display: none; border-top: 1px solid var(--border); background: var(--white); }
.accordion-item.open .accordion-body { display: block; }

/* ─── Question list ─────────────────────────────────────────────────────── */
.question-list { display: flex; flex-direction: column; gap: 6px; }
.question-row {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 10px; border: 1px solid var(--border); border-radius: 6px;
  background: var(--white);
}
.question-row .q-text { flex: 1; font-size: 13px; }
.answer-row {
  display: flex; align-items: center; gap: 8px;
  padding: 6px 10px; border-radius: 6px;
  background: #fafafa;
  border: 1px solid var(--border);
}
.answer-row.correct { background: #dcfce7; border-color: #86efac; }
.answer-row .correct-badge { font-size: 10px; font-family: 'DM Mono', monospace; background: var(--success); color: #fff; padding: 1px 6px; border-radius: 4px; }

/* ─── Empty state ───────────────────────────────────────────────────────── */
.empty-state { text-align: center; padding: 48px 24px; color: var(--muted); }
.empty-state svg { margin-bottom: 12px; opacity: .35; }
.empty-state p { font-size: 14px; }

/* ─── Login page ────────────────────────────────────────────────────────── */
#login-page {
  min-height: 100vh;
  background: var(--navy);
  display: flex; align-items: center; justify-content: center;
}
.login-card {
  width: 380px;
  background: var(--white);
  border-radius: 16px;
  box-shadow: 0 24px 48px rgba(0,0,0,.3);
  padding: 40px;
}
.login-logo {
  display: flex; align-items: center; gap: 12px;
  margin-bottom: 32px;
}
.login-logo .box {
  width: 44px; height: 44px;
  background: var(--orange);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-family: 'DM Mono', monospace; font-weight: 500;
  font-size: 15px; color: #fff;
}
.login-logo .text h2 { font-size: 18px; font-weight: 700; }
.login-logo .text p  { font-size: 11px; color: var(--muted); text-transform: uppercase; letter-spacing: .06em; }
.login-card h3 { font-size: 22px; font-weight: 600; margin-bottom: 6px; }
.login-card .subtitle { font-size: 13px; color: var(--muted); margin-bottom: 28px; }
.login-form .form-group { margin-bottom: 16px; }
.login-form label { display: block; font-size: 12px; font-weight: 500; color: var(--muted); text-transform: uppercase; letter-spacing: .05em; margin-bottom: 6px; }
.login-form input { width: 100%; padding: 11px 14px; border: 1.5px solid var(--border); border-radius: 8px; font-size: 14px; outline: none; transition: border .15s, box-shadow .15s; }
.login-form input:focus { border-color: var(--orange); box-shadow: 0 0 0 3px rgba(232,93,4,.15); }
.login-btn { width: 100%; padding: 12px; background: var(--orange); color: #fff; border: none; border-radius: 8px; font-size: 15px; font-weight: 600; cursor: pointer; margin-top: 8px; transition: background .15s; }
.login-btn:hover { background: #c94d00; }
.login-error { background: #fee2e2; color: var(--danger); border-radius: 7px; padding: 10px 14px; font-size: 13px; margin-top: 12px; display: none; }

/* ─── Responsive ────────────────────────────────────────────────────────── */
@media (max-width: 900px) {
  :root { --sidebar-w: 60px; }
  .sidebar-brand .logo-text, .sidebar-brand .logo-sub, .nav-section-label,
  .nav-item span, .sidebar-user .user-info { display: none; }
  .nav-item { justify-content: center; padding: 12px; }
}
@media (max-width: 640px) {
  .form-grid { grid-template-columns: 1fr; }
  .form-grid.cols-3 { grid-template-columns: 1fr; }
  #content { padding: 16px; }
}

/* ─── Misc ──────────────────────────────────────────────────────────────── */
.divider { height: 1px; background: var(--border); margin: 16px 0; }
.text-muted { color: var(--muted); }
.text-sm { font-size: 12px; }
.fw-500 { font-weight: 500; }
.d-flex { display: flex; }
.gap-8  { gap: 8px; }
.mb-16  { margin-bottom: 16px; }
.loading { display: flex; align-items: center; justify-content: center; padding: 40px; color: var(--muted); gap: 10px; }
.spinner { width: 20px; height: 20px; border: 2px solid var(--border); border-top-color: var(--orange); border-radius: 50%; animation: spin .6s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }