/* ================================================================
   BI Toets Studieplatform – style.css
   Full responsive stylesheet with hamburger menu, mobile portrait
   and landscape support.
   ================================================================ */

/* ----------------------------------------------------------------
   CSS CUSTOM PROPERTIES
   ---------------------------------------------------------------- */
:root {
  --primary: #2563eb;
  --primary-light: #dbeafe;
  --primary-dark: #1d4ed8;
  --secondary: #7c3aed;
  --secondary-light: #ede9fe;
  --success: #059669;
  --success-light: #d1fae5;
  --warning: #d97706;
  --warning-light: #fef3c7;
  --danger: #dc2626;
  --danger-light: #fee2e2;
  --info: #0891b2;
  --info-light: #cffafe;
  --gray-50: #f9fafb;
  --gray-100: #f3f4f6;
  --gray-200: #e5e7eb;
  --gray-300: #d1d5db;
  --gray-400: #9ca3af;
  --gray-500: #6b7280;
  --gray-600: #4b5563;
  --gray-700: #374151;
  --gray-800: #1f2937;
  --gray-900: #111827;
  --sidebar-w: 270px;
  --radius: 10px;
  --shadow: 0 1px 3px rgba(0, 0, 0, .1);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .1);
}

/* ----------------------------------------------------------------
   RESET & BASE
   ---------------------------------------------------------------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--gray-50);
  color: var(--gray-800);
  display: flex;
  min-height: 100vh;
  font-size: 15px;
  line-height: 1.6;
}

* {
  scrollbar-width: thin;
  scrollbar-color: var(--gray-200) transparent;
}

/* ----------------------------------------------------------------
   SIDEBAR
   ---------------------------------------------------------------- */
#sidebar {
  width: var(--sidebar-w);
  background: #fff;
  border-right: 1px solid var(--gray-200);
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  overflow-y: auto;
  z-index: 200;
  display: flex;
  flex-direction: column;
  transition: transform 0.28s cubic-bezier(0.4, 0, 0.2, 1);
}

#sidebar::-webkit-scrollbar { width: 4px; }
#sidebar::-webkit-scrollbar-thumb { background: var(--gray-200); border-radius: 2px; }

.sidebar-logo {
  padding: 18px 16px 14px;
  border-bottom: 1px solid var(--gray-100);
}

.sidebar-logo h2 {
  font-size: 16px;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 2px;
}

.sidebar-logo p {
  font-size: 11px;
  color: var(--gray-500);
}

.sidebar-exam-info {
  margin: 10px;
  background: var(--primary-light);
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 12px;
  color: var(--primary-dark);
}

.sidebar-exam-info strong {
  display: block;
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: .5px;
  margin-bottom: 5px;
}

.exam-pill {
  display: flex;
  justify-content: space-between;
  margin-bottom: 2px;
}

.ep-num {
  font-weight: 700;
  color: var(--primary);
}

/* ----------------------------------------------------------------
   NAVIGATION
   ---------------------------------------------------------------- */
.nav-group { padding: 6px 0; }

.nav-group-label {
  padding: 4px 14px 2px;
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--gray-400);
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 14px;
  cursor: pointer;
  transition: all .15s;
  color: var(--gray-600);
  font-size: 13px;
  text-decoration: none;
  border: none;
  background: none;
  width: 100%;
  text-align: left;
}

.nav-item:hover {
  background: var(--gray-50);
  color: var(--gray-900);
}

.nav-item.active {
  background: var(--primary-light);
  color: var(--primary-dark);
  font-weight: 600;
}

.nav-badge {
  margin-left: auto;
  background: var(--gray-100);
  color: var(--gray-500);
  font-size: 10px;
  padding: 1px 6px;
  border-radius: 10px;
}

.nav-item.active .nav-badge {
  background: var(--primary);
  color: #fff;
}

/* ----------------------------------------------------------------
   MAIN LAYOUT
   ---------------------------------------------------------------- */
#main {
  margin-left: var(--sidebar-w);
  flex: 1;
  min-width: 0;
  transition: margin-left 0.28s cubic-bezier(0.4, 0, 0.2, 1);
}

#topbar {
  position: sticky;
  top: 0;
  height: 60px;
  background: #fff;
  border-bottom: 1px solid var(--gray-200);
  display: flex;
  align-items: center;
  padding: 0 22px;
  gap: 14px;
  z-index: 100;
  box-shadow: var(--shadow);
}

#topbar h1 {
  font-size: 17px;
  font-weight: 700;
  flex: 1;
  color: var(--gray-900);
}

.top-chip {
  background: var(--gray-100);
  border: 1px solid var(--gray-200);
  border-radius: 20px;
  padding: 3px 10px;
  font-size: 12px;
  color: var(--gray-600);
}

.top-chip span {
  font-weight: 700;
  color: var(--primary);
}

#content {
  padding: 24px;
  max-width: 1060px;
}

.page { display: none; }
.page.active { display: block; }

/* ----------------------------------------------------------------
   HAMBURGER BUTTON
   ---------------------------------------------------------------- */
.hamburger-btn {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  border: none;
  background: none;
  cursor: pointer;
  border-radius: 8px;
  padding: 6px;
  transition: background 0.15s;
  flex-shrink: 0;
  z-index: 300;
  position: relative;
}

.hamburger-btn:hover { background: var(--gray-100); }
.hamburger-btn:active { background: var(--gray-200); }

.hamburger-btn span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--gray-700);
  border-radius: 2px;
  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  transform-origin: center;
}

/* Animate hamburger to X when open */
body.sidebar-open .hamburger-btn span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
body.sidebar-open .hamburger-btn span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
body.sidebar-open .hamburger-btn span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ----------------------------------------------------------------
   SIDEBAR OVERLAY (mobile)
   ---------------------------------------------------------------- */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  z-index: 150;
  opacity: 0;
  transition: opacity 0.28s ease;
}

body.sidebar-open .sidebar-overlay {
  opacity: 1;
}

/* ----------------------------------------------------------------
   HERO
   ---------------------------------------------------------------- */
.hero {
  background: linear-gradient(135deg, #1e40af 0%, #7c3aed 100%);
  color: #fff;
  border-radius: 16px;
  padding: 32px;
  margin-bottom: 24px;
  position: relative;
  overflow: hidden;
}

.hero::after {
  content: "🦷";
  position: absolute;
  right: 28px;
  bottom: 12px;
  font-size: 72px;
  opacity: .12;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, .2);
  border-radius: 20px;
  padding: 4px 12px;
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 12px;
}

.hero h1 {
  font-size: 26px;
  font-weight: 800;
  margin-bottom: 8px;
}

.hero p {
  font-size: 14px;
  opacity: .9;
  max-width: 540px;
  line-height: 1.7;
}

.hero-stats {
  display: flex;
  gap: 20px;
  margin-top: 20px;
  flex-wrap: wrap;
}

.hero-stat .num {
  font-size: 24px;
  font-weight: 800;
  display: block;
}

.hero-stat .lbl {
  font-size: 11px;
  opacity: .8;
  text-transform: uppercase;
  letter-spacing: .8px;
}

/* ----------------------------------------------------------------
   EXAM GRID & CARDS
   ---------------------------------------------------------------- */
.exam-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
  gap: 12px;
  margin-bottom: 24px;
}

.exam-card {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 14px;
  cursor: pointer;
  transition: all .2s;
}

.exam-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
  border-color: var(--primary);
}

.ec-icon { font-size: 26px; margin-bottom: 6px; }
.ec-title { font-size: 13px; font-weight: 700; color: var(--gray-900); margin-bottom: 3px; }
.ec-sub { font-size: 11px; color: var(--gray-500); margin-bottom: 8px; line-height: 1.4; }

.ec-nums { display: flex; gap: 6px; flex-wrap: wrap; }
.ec-num-badge {
  background: var(--gray-100);
  border-radius: 5px;
  padding: 2px 7px;
  font-size: 11px;
}
.ec-num-badge strong { color: var(--primary); }

/* ----------------------------------------------------------------
   SECTION HEADER
   ---------------------------------------------------------------- */
.section-hdr {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: 2px solid var(--gray-100);
}

.section-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
}

.si-blue   { background: var(--primary-light); }
.si-purple { background: var(--secondary-light); }
.si-green  { background: var(--success-light); }
.si-orange { background: var(--warning-light); }
.si-red    { background: var(--danger-light); }
.si-teal   { background: var(--info-light); }

.section-hdr h2 {
  font-size: 20px;
  font-weight: 800;
  color: var(--gray-900);
}

.section-hdr p {
  font-size: 12px;
  color: var(--gray-500);
  margin-top: 2px;
}

/* ----------------------------------------------------------------
   TABS
   ---------------------------------------------------------------- */
.tab-bar {
  display: flex;
  border-bottom: 2px solid var(--gray-200);
  margin-bottom: 20px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.tab-btn {
  padding: 9px 18px;
  font-size: 13px;
  font-weight: 500;
  border: none;
  background: none;
  cursor: pointer;
  color: var(--gray-500);
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  white-space: nowrap;
  transition: all .15s;
}

.tab-btn:hover { color: var(--gray-900); }

.tab-btn.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
  font-weight: 600;
}

.tab-content { display: none; }
.tab-content.active { display: block; }

/* ----------------------------------------------------------------
   THEORY CARDS
   ---------------------------------------------------------------- */
.theory-card {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  margin-bottom: 12px;
  overflow: hidden;
}

.theory-header {
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  transition: background .15s;
}

.theory-header:hover { background: var(--gray-50); }

.theory-tag {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .8px;
  padding: 2px 8px;
  border-radius: 5px;
  flex-shrink: 0;
}

.tt-blue   { background: var(--primary-light);   color: var(--primary); }
.tt-green  { background: var(--success-light);   color: var(--success); }
.tt-orange { background: var(--warning-light);   color: var(--warning); }
.tt-purple { background: var(--secondary-light); color: var(--secondary); }
.tt-red    { background: var(--danger-light);    color: var(--danger); }
.tt-teal   { background: var(--info-light);      color: var(--info); }

.theory-header h3 {
  flex: 1;
  font-size: 14px;
  font-weight: 600;
}

.theory-chevron {
  color: var(--gray-400);
  transition: transform .2s;
  font-size: 12px;
}

.theory-card.open .theory-chevron { transform: rotate(180deg); }

.theory-body {
  display: none;
  padding: 0 16px 16px;
}

.theory-card.open .theory-body { display: block; }

.theory-body p {
  font-size: 14px;
  color: var(--gray-700);
  margin-bottom: 8px;
  line-height: 1.7;
}

.theory-body ul { list-style: none; margin-bottom: 8px; }

.theory-body ul li {
  font-size: 14px;
  padding: 2px 0 2px 16px;
  position: relative;
  color: var(--gray-700);
}

.theory-body ul li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--primary);
  font-size: 11px;
  top: 3px;
}

.theory-body table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  margin: 10px 0;
}

.theory-body th {
  background: var(--gray-50);
  padding: 7px 10px;
  text-align: left;
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .5px;
  color: var(--gray-500);
  border-bottom: 1px solid var(--gray-200);
}

.theory-body td {
  padding: 7px 10px;
  border-bottom: 1px solid var(--gray-100);
}

.theory-body tr:hover td { background: var(--gray-50); }

/* ----------------------------------------------------------------
   INFO / WARN / DANGER BOXES
   ---------------------------------------------------------------- */
.info-box {
  background: #f0f9ff;
  border-left: 4px solid var(--primary);
  border-radius: 0 8px 8px 0;
  padding: 12px 14px;
  margin-bottom: 14px;
}

.info-box-title {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .8px;
  color: var(--primary);
  margin-bottom: 6px;
}

.info-box ul { list-style: none; }

.info-box ul li {
  font-size: 13.5px;
  padding: 2px 0 2px 14px;
  position: relative;
}

.info-box ul li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--primary);
  font-size: 11px;
  top: 3px;
}

.warn-box {
  background: var(--warning-light);
  border: 1px solid #fde68a;
  border-radius: 8px;
  padding: 11px 14px;
  font-size: 13.5px;
  margin: 10px 0;
}

.success-box {
  background: var(--success-light);
  border: 1px solid #6ee7b7;
  border-radius: 8px;
  padding: 11px 14px;
  font-size: 13.5px;
  margin: 10px 0;
}

.danger-box {
  background: var(--danger-light);
  border: 1px solid #fca5a5;
  border-radius: 8px;
  padding: 11px 14px;
  font-size: 13.5px;
  margin: 10px 0;
}

/* ----------------------------------------------------------------
   BUTTONS
   ---------------------------------------------------------------- */
.btn {
  padding: 7px 16px;
  border-radius: 8px;
  font-size: 13.5px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all .15s;
}

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

.btn-secondary {
  background: var(--gray-100);
  color: var(--gray-700);
  border: 1px solid var(--gray-200);
}

.btn-secondary:hover { background: var(--gray-200); }
.btn-success { background: var(--success); color: #fff; }

/* ----------------------------------------------------------------
   QUIZ CONTROLS & PROGRESS
   ---------------------------------------------------------------- */
.quiz-controls {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}

.quiz-progress {
  background: var(--gray-100);
  border-radius: 20px;
  padding: 5px 12px;
  font-size: 12px;
  color: var(--gray-600);
  margin-left: auto;
}

.quiz-progress strong { color: var(--primary); }

/* ----------------------------------------------------------------
   QUIZ QUESTION & OPTIONS
   ---------------------------------------------------------------- */
.quiz-question {
  background: #fff;
  border: 1.5px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 16px;
}

.qnum {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .8px;
  color: var(--gray-400);
  margin-bottom: 8px;
}

.qtext {
  font-size: 15px;
  font-weight: 500;
  color: var(--gray-800);
  margin-bottom: 16px;
  line-height: 1.65;
}

.quiz-options {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.quiz-option {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 11px 14px;
  border: 1.5px solid var(--gray-200);
  border-radius: 8px;
  cursor: pointer;
  transition: all .15s;
  font-size: 13.5px;
  background: #fff;
  text-align: left;
  width: 100%;
  line-height: 1.5;
}

.quiz-option:hover:not(:disabled) {
  border-color: var(--primary);
  background: var(--primary-light);
}

.quiz-option:disabled { cursor: default; }

.quiz-option.correct {
  border-color: var(--success);
  background: var(--success-light);
  color: var(--success);
  font-weight: 600;
}

.quiz-option.wrong {
  border-color: var(--danger);
  background: var(--danger-light);
  color: var(--danger);
}

.quiz-option.reveal-correct {
  border-color: var(--success);
  background: var(--success-light);
}

.opt-letter {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--gray-100);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 1px;
}

.quiz-option.correct .opt-letter   { background: var(--success); color: #fff; }
.quiz-option.wrong .opt-letter     { background: var(--danger);  color: #fff; }
.quiz-option.reveal-correct .opt-letter { background: var(--success); color: #fff; }

.quiz-explanation {
  margin-top: 14px;
  padding: 12px 14px;
  background: #fffbeb;
  border: 1px solid #fde68a;
  border-radius: 8px;
  font-size: 13px;
  line-height: 1.6;
  display: none;
}

.quiz-explanation.show { display: block; }

.quiz-next-btn {
  margin-top: 14px;
  display: none;
}

.quiz-next-btn.show { display: flex; }

/* ----------------------------------------------------------------
   QUIZ SET SELECTOR
   ---------------------------------------------------------------- */
.quiz-set-selector {
  margin-bottom: 24px;
}

.quiz-set-selector h3 {
  font-size: 15px;
  font-weight: 700;
  color: var(--gray-700);
  margin-bottom: 4px;
}

.set-selector-meta {
  color: var(--gray-500);
  font-size: 12px;
  margin-bottom: 12px;
}

.quiz-set-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}

.quiz-set-card {
  background: #fff;
  border: 1.5px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 14px 16px;
  cursor: pointer;
  transition: all .2s;
  text-align: left;
}

.quiz-set-card:hover {
  border-color: var(--primary);
  background: var(--primary-light);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.quiz-set-card .set-title {
  font-size: 13px;
  font-weight: 600;
  color: var(--gray-800);
  margin-bottom: 6px;
  line-height: 1.4;
}

.set-badge {
  display: inline-block;
  background: var(--gray-100);
  color: var(--gray-500);
  font-size: 10px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 10px;
}

.quiz-set-card:hover .set-badge {
  background: var(--primary);
  color: #fff;
}

/* ----------------------------------------------------------------
   SCORE CARD
   ---------------------------------------------------------------- */
.score-card {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff;
  border-radius: 14px;
  padding: 28px 24px;
  text-align: center;
  margin-bottom: 18px;
}

.score-card h3 { font-size: 17px; margin-bottom: 6px; }

.score-num {
  font-size: 52px;
  font-weight: 800;
  line-height: 1;
  margin-bottom: 4px;
}

.score-pct {
  font-size: 24px;
  font-weight: 700;
  opacity: .9;
  margin-bottom: 8px;
}

.score-msg {
  font-size: 14px;
  opacity: .85;
  margin-bottom: 18px;
}

.score-card.score-red    { background: linear-gradient(135deg, #dc2626, #9f1239); }
.score-card.score-orange { background: linear-gradient(135deg, #d97706, #b45309); }
.score-card.score-green  { background: linear-gradient(135deg, #059669, #065f46); }

/* ----------------------------------------------------------------
   INLINE BADGES
   ---------------------------------------------------------------- */
.badge-ans {
  background: var(--primary-light);
  color: var(--primary);
  font-weight: 600;
  padding: 2px 7px;
  border-radius: 5px;
  font-size: 11px;
}

.badge-oj {
  background: var(--danger-light);
  color: var(--danger);
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 5px;
  font-size: 11px;
}

.badge-j {
  background: var(--success-light);
  color: var(--success);
  font-weight: 700;
  padding: 2px 7px;
  border-radius: 5px;
  font-size: 11px;
}

/* ----------------------------------------------------------------
   TABLES
   ---------------------------------------------------------------- */
table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13.5px;
}

th {
  background: var(--gray-50);
  padding: 9px 12px;
  text-align: left;
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .8px;
  color: var(--gray-500);
  border-bottom: 1px solid var(--gray-200);
}

td {
  padding: 9px 12px;
  border-bottom: 1px solid var(--gray-100);
}

tr:hover td { background: var(--gray-50); }

/* ----------------------------------------------------------------
   SUMMARY TABLE
   ---------------------------------------------------------------- */
.summary-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13.5px;
}

.summary-table th {
  background: var(--gray-50);
  padding: 9px 12px;
  text-align: left;
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .8px;
  color: var(--gray-500);
  border-bottom: 1px solid var(--gray-200);
}

.summary-table td {
  padding: 9px 12px;
  border-bottom: 1px solid var(--gray-100);
}

.summary-table tr:hover td { background: var(--gray-50); }

/* ----------------------------------------------------------------
   QUESTION CARD (legacy / all-questions style)
   ---------------------------------------------------------------- */
.question-card {
  background: #fff;
  border: 1.5px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 18px;
  margin-bottom: 12px;
  transition: all .2s;
}

.question-card.answered-correct { border-color: var(--success); background: #f0fdf4; }
.question-card.answered-wrong   { border-color: var(--danger);  background: #fef2f2; }

.question-num {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--gray-400);
  margin-bottom: 5px;
}

.question-text {
  font-size: 14.5px;
  font-weight: 500;
  color: var(--gray-800);
  margin-bottom: 12px;
  line-height: 1.6;
}

.options { display: flex; flex-direction: column; gap: 7px; }

.option {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 9px 12px;
  border: 1.5px solid var(--gray-200);
  border-radius: 8px;
  cursor: pointer;
  transition: all .15s;
  font-size: 13.5px;
}

.option:hover:not(.disabled) { border-color: var(--primary); background: var(--primary-light); }
.option.selected-correct { border-color: var(--success); background: var(--success-light); color: var(--success); font-weight: 600; }
.option.selected-wrong   { border-color: var(--danger);  background: var(--danger-light);  color: var(--danger); }
.option.correct-reveal   { border-color: var(--success); background: var(--success-light); }
.option.disabled         { cursor: default; }

.option-letter {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--gray-100);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 700;
  flex-shrink: 0;
}

.option.selected-correct .option-letter { background: var(--success); color: #fff; }
.option.selected-wrong   .option-letter { background: var(--danger);  color: #fff; }
.option.correct-reveal   .option-letter { background: var(--success); color: #fff; }

.explanation {
  margin-top: 12px;
  padding: 11px 14px;
  background: #fffbeb;
  border: 1px solid #fde68a;
  border-radius: 8px;
  font-size: 13px;
  display: none;
}

.explanation.show { display: block; }

/* ----------------------------------------------------------------
   CHEAT SHEET
   ---------------------------------------------------------------- */
.cheat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
  gap: 8px;
  margin: 14px 0;
}

.cheat-item {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 12px;
  text-align: center;
}

.cheat-item .ci-val { font-size: 20px; font-weight: 800; color: var(--primary); display: block; }
.cheat-item .ci-key { font-size: 11px; color: var(--gray-500); margin-top: 3px; }
.cheat-item.c-green .ci-val  { color: var(--success); }
.cheat-item.c-orange .ci-val { color: var(--warning); }
.cheat-item.c-red .ci-val    { color: var(--danger); }

/* ----------------------------------------------------------------
   RICHTLIJN CARDS
   ---------------------------------------------------------------- */
.rl-card {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 18px;
  margin-bottom: 12px;
}

.rl-card h3 { font-size: 14px; font-weight: 700; color: var(--gray-900); margin-bottom: 3px; }
.rl-card .rl-org { font-size: 11px; color: var(--gray-400); margin-bottom: 10px; }

.rl-steps { list-style: none; counter-reset: step; }
.rl-steps li {
  padding: 4px 0 4px 20px;
  position: relative;
  font-size: 13.5px;
  counter-increment: step;
}

.rl-steps li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  background: var(--primary);
  color: #fff;
  font-size: 9px;
  font-weight: 700;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  top: 5px;
}

/* ----------------------------------------------------------------
   CASUS CARDS
   ---------------------------------------------------------------- */
.casus-card {
  background: #fff;
  border: 1.5px solid var(--gray-200);
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 18px;
}

.casus-source {
  margin-top: 10px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
}

.casus-label {
  font-size: 10px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--gray-400);
  margin-bottom: 7px;
}

.casus-text {
  font-size: 14px;
  color: var(--gray-700);
  line-height: 1.8;
  margin-bottom: 14px;
  background: var(--gray-50);
  border-radius: 8px;
  padding: 12px;
}

.casus-q { border-top: 1px solid var(--gray-100); padding: 10px 0; }
.casus-q-text { font-size: 13.5px; font-weight: 600; color: var(--gray-800); margin-bottom: 7px; }

.casus-answer {
  display: none;
  background: var(--success-light);
  border-radius: 8px;
  padding: 9px 12px;
  font-size: 13.5px;
  margin-top: 7px;
}

.casus-answer.show { display: block; }

/* ----------------------------------------------------------------
   DRIVE NOTES
   ---------------------------------------------------------------- */
.drive-notes-summary {
  border-left: 4px solid var(--primary);
}

.drive-notes-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 14px;
  margin: 18px 0 24px;
}

.drive-note-card {
  background: #fff;
  border: 1.5px solid var(--gray-200);
  border-radius: 10px;
  padding: 16px 18px;
}

.drive-note-card h3 {
  font-size: 16px;
  line-height: 1.35;
  color: var(--gray-900);
  margin: 4px 0 10px;
}

.drive-note-card ul {
  margin: 0;
  padding-left: 18px;
}

.drive-note-card li {
  color: var(--gray-700);
  font-size: 13.5px;
  line-height: 1.65;
  margin-bottom: 7px;
}

.drive-note-source {
  color: var(--muted);
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .7px;
}

/* ----------------------------------------------------------------
   GESPREK CARDS
   ---------------------------------------------------------------- */
.gesprek-card {
  background: #fff;
  border: 1px solid var(--gray-200);
  border-radius: 12px;
  overflow: hidden;
  margin-bottom: 14px;
}

.gesprek-scene {
  background: var(--primary-light);
  padding: 12px 16px;
  font-size: 12.5px;
  color: var(--primary-dark);
  font-weight: 600;
}

.gesprek-body { padding: 14px 16px; }

.msg { display: flex; gap: 9px; margin-bottom: 10px; }
.msg-tandarts { flex-direction: row-reverse; }

.msg-avatar {
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 700;
  flex-shrink: 0;
}

.msg-tandarts .msg-avatar { background: var(--success); }

.msg-bubble {
  background: var(--gray-100);
  border-radius: 11px;
  padding: 9px 12px;
  font-size: 13px;
  max-width: 80%;
}

.msg-tandarts .msg-bubble { background: var(--primary-light); color: var(--primary-dark); }

.msg-name { font-size: 9px; font-weight: 700; color: var(--gray-400); margin-bottom: 2px; }

/* ----------------------------------------------------------------
   FOOTER
   ---------------------------------------------------------------- */
.page-footer {
  border-top: 1px solid var(--gray-200);
  margin-top: 36px;
  padding: 18px 0;
  text-align: center;
  font-size: 12px;
  color: var(--gray-400);
}

/* ================================================================
   RESPONSIVE – MOBILE PORTRAIT  (max-width: 768px)
   ================================================================ */
@media (max-width: 768px) {
  /* Show hamburger */
  .hamburger-btn {
    display: flex;
  }

  /* Sidebar hidden by default, slides in from left */
  #sidebar {
    transform: translateX(-100%);
    box-shadow: none;
  }

  /* When sidebar-open class on body, slide sidebar in */
  body.sidebar-open #sidebar {
    transform: translateX(0);
    box-shadow: 2px 0 20px rgba(0, 0, 0, .18);
  }

  /* Overlay visible and interactive when sidebar is open */
  body.sidebar-open .sidebar-overlay {
    display: block;
  }

  /* Main content takes full width */
  #main {
    margin-left: 0;
  }

  /* Topbar adjustments */
  #topbar {
    padding: 0 12px;
    gap: 8px;
  }

  #topbar h1 {
    font-size: 14px;
  }

  .top-chip {
    display: none; /* hide chips on small phones */
  }

  /* Content padding */
  #content {
    padding: 14px;
  }

  /* Hero */
  .hero {
    padding: 20px;
    border-radius: 12px;
  }

  .hero h1 { font-size: 20px; }
  .hero p  { font-size: 13px; }

  .hero-stats { gap: 14px; }
  .hero-stat .num { font-size: 20px; }

  /* Exam grid 2 columns */
  .exam-grid {
    grid-template-columns: 1fr 1fr;
    gap: 8px;
  }

  /* Cheat grid 3 columns */
  .cheat-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  /* Quiz set grid 2 columns on mobile */
  .quiz-set-grid {
    grid-template-columns: 1fr 1fr;
  }

  /* Tab bar smaller text */
  .tab-btn {
    padding: 8px 12px;
    font-size: 12px;
  }

  /* Section header */
  .section-hdr h2 { font-size: 17px; }

  /* Score card */
  .score-num { font-size: 40px; }
  .score-pct { font-size: 20px; }

  /* Theory body table scroll */
  .theory-body table {
    display: block;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  /* Quiz option text smaller */
  .quiz-option { font-size: 13px; padding: 10px 12px; }
}

/* ================================================================
   RESPONSIVE – MOBILE LANDSCAPE
   (orientation: landscape AND max-width: 900px)
   ================================================================ */
@media (orientation: landscape) and (max-width: 900px) {
  /* Hamburger still visible */
  .hamburger-btn { display: flex; }

  /* Sidebar hidden by default in landscape too */
  #sidebar {
    transform: translateX(-100%);
    /* Narrower sidebar in landscape to maximise content area */
    width: 240px;
  }

  body.sidebar-open #sidebar {
    transform: translateX(0);
    box-shadow: 2px 0 20px rgba(0, 0, 0, .18);
  }

  body.sidebar-open .sidebar-overlay { display: block; }

  #main { margin-left: 0; }

  /* Landscape: slightly more compact padding */
  #content { padding: 12px 18px; }

  #topbar {
    height: 52px;
    padding: 0 14px;
  }

  #topbar h1 { font-size: 14px; }

  /* Slightly smaller font for landscape to fit more content */
  body { font-size: 14px; }

  .hero {
    padding: 18px 22px;
    margin-bottom: 16px;
  }

  .hero h1 { font-size: 20px; }
  .hero p  { font-size: 13px; }

  .hero-stats { gap: 14px; margin-top: 14px; }
  .hero-stat .num { font-size: 20px; }

  /* Two-column grids use more columns in landscape */
  .exam-grid {
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  }

  .quiz-set-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .cheat-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  /* Reduce section header size */
  .section-hdr h2 { font-size: 17px; }

  /* Tab buttons slightly smaller */
  .tab-btn { padding: 7px 14px; font-size: 12px; }

  .score-num { font-size: 44px; }
}