:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --danger: #dc2626;
  --gray: #6b7280;
  --bg: #f5f6f8;
  --card-bg: #ffffff;
  --border: #e2e5ea;
  --text: #1f2430;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 28px;
  background: var(--card-bg);
  border-bottom: 1px solid var(--border);
}

.navbar-brand { font-weight: 700; font-size: 1.1rem; }
.navbar-links { display: flex; align-items: center; gap: 16px; }
.navbar-links a { color: var(--primary); text-decoration: none; }
.navbar-user { color: var(--gray); font-size: 0.9rem; }

.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 24px 20px 60px;
}

h1 { font-size: 1.6rem; margin-bottom: 4px; }
h2 { font-size: 1.15rem; }

.card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 20px;
  margin-top: 18px;
}

.height-500 {
  max-height: 500px;
  overflow-y: auto;
  /* background-color: blue; */
}

.auth-card { max-width: 380px; margin: 60px auto; }

form label {
  display: flex;
  flex-direction: column;
  gap: 4px;
  font-size: 0.9rem;
  color: var(--gray);
  margin-bottom: 12px;
}

.stacked-form label { max-width: 480px; }

input[type=text], input[type=password], input[type=number], textarea, select {
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 0.95rem;
  font-family: inherit;
}

textarea { min-height: 70px; resize: vertical; }

.inline-form { display: flex; flex-wrap: wrap; gap: 14px; align-items: end; }
.inline-form label { margin-bottom: 0; }

.checkbox-label {
  display: flex !important;
  flex-direction: row !important;
  align-items: center;
  gap: 6px;
  font-size: 0.9rem;
}

.checkbox-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; margin-bottom: 14px; }

.btn {
  display: inline-block;
  padding: 9px 16px;
  border-radius: 6px;
  border: none;
  background: var(--primary);
  color: white;
  font-size: 0.9rem;
  cursor: pointer;
  text-decoration: none;
}
.btn:hover { background: var(--primary-dark); }
.btn-primary { background: var(--primary); }
.btn-secondary { background: var(--gray); }
.btn-danger { background: var(--danger); }
.btn-small { padding: 5px 10px; font-size: 0.8rem; }
.btn-large { padding: 12px 24px; font-size: 1rem; margin-top: 18px; }

.table { width: 100%; border-collapse: collapse; margin-top: 10px; }
.table th, .table td {
  text-align: left;
  padding: 8px 10px;
  border-bottom: 1px solid var(--border);
  font-size: 0.9rem;
}
.delete{
  background-color: red;
}
.table th { color: var(--gray); font-weight: 600; }

.badge {
  background: #eef2ff;
  color: var(--primary);
  padding: 2px 8px;
  border-radius: 12px;
  font-size: 0.75rem;
  text-transform: capitalize;
}

.tag { padding: 2px 8px; border-radius: 12px; font-size: 0.75rem; }
.tag-green { background: #dcfce7; color: #15803d; }
.tag-red { background: #fee2e2; color: #b91c1c; }
.tag-gray { background: #f1f2f4; color: var(--gray); }

.hint { color: var(--gray); font-size: 0.85rem; }

.flash {
  padding: 10px 14px;
  border-radius: 6px;
  margin-bottom: 14px;
  font-size: 0.9rem;
}
.flash-success { background: #dcfce7; color: #15803d; }
.flash-error { background: #fee2e2; color: #b91c1c; }

.question-row { padding: 10px 0; }
.options-list { list-style: none; padding-left: 0; }
.options-list li { padding: 3px 0; color: var(--gray); }
.options-list li.correct { color: #15803d; font-weight: 600; }

.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}
.page-header h1 { margin-bottom: 0; }

.stat-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 10px;
}
.stat-box {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px 20px;
  min-width: 120px;
  text-align: center;
}
.stat-value { font-size: 1.5rem; font-weight: 700; color: var(--primary); }
.stat-label { font-size: 0.8rem; color: var(--gray); margin-top: 2px; }

.exam-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  background: var(--bg);
  padding: 10px 0;
}

.timer {
  font-size: 1.4rem;
  font-weight: 700;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 6px 16px;
}

.question-card { margin-top: 14px; }

.options-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 24px;
  margin-top: 10px;
}
.option-label-inline {
  display: flex !important;
  flex-direction: row !important;
  align-items: center;
  gap: 6px;
  font-size: 0.95rem;
  cursor: pointer;
  white-space: nowrap;
}

.qnav-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 20px;
}
.qnav-btn {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  border: none;
  background: #eceef1;
  color: var(--text);
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
}
.qnav-btn:hover { background: #dfe2e7; }
.qnav-btn.qnav-answered { background: #dcfce7; color: #15803d; }
.qnav-btn.qnav-current { outline: 2px solid var(--primary); outline-offset: 2px; }


.proctor-actions { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
.proctor-actions form { display: inline-flex; margin: 0; }
.time-adjust-form { gap: 4px; }
.time-adjust-form input[type=number] { width: 64px; padding: 5px 6px; font-size: 0.8rem; }

.option-label {
  display: flex !important;
  flex-direction: row !important;
  align-items: center;
  gap: 8px;
  padding: 6px 0;
  font-size: 0.95rem;
  cursor: pointer;
}

/* Full-screen enforcement overlays */
.exam-blur-target { transition: filter 0.2s ease; }
.exam-blur-target.exam-blurred {
  filter: blur(10px);
  pointer-events: none;
  user-select: none;
}

.fs-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  background: rgba(15, 18, 26, 0.72);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
}
.fs-overlay-box {
  background: var(--card-bg);
  border-radius: 12px;
  padding: 32px 36px;
  max-width: 420px;
  text-align: center;
  box-shadow: 0 10px 40px rgba(0,0,0,0.3);
}
.fs-overlay-box h2 { margin-top: 0; }
.fs-overlay-box p { color: var(--gray); font-size: 0.95rem; }

/* Question analysis */
.qa-summary-row { display: flex; flex-wrap: wrap; gap: 14px; }
.qa-bar-track {
  background: var(--bg);
  border-radius: 6px;
  height: 10px;
  width: 100%;
  overflow: hidden;
}
.qa-bar-fill { height: 100%; background: var(--primary); }
.qa-bar-fill.qa-bar-low { background: var(--danger); }
.qa-bar-fill.qa-bar-mid { background: #d97706; }
.qa-option-dist { display: flex; gap: 10px; flex-wrap: wrap; font-size: 0.8rem; color: var(--gray); }
.qa-option-dist .qa-correct-opt { color: #15803d; font-weight: 600; }