/* ========================================================
   SIMULASI TKA BY KELAS SENJA - PASTEL PURPLE & PINK DESIGN SYSTEM
   Theme: Pastel Purple & Pink Education Platform
   Style: Soft, Cute, Elegant, Modern, Aesthetic, SD-Friendly
   UX: Enhanced Responsiveness, Tabular Timer, Split-View Containment
   ======================================================== */

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800;900&family=JetBrains+Mono:wght@500;600;700&display=swap');

:root {
  /* 1. Core Color System (Pastel Purple & Pink) */
  --primary: #7041B8;
  --primary-dark: #44246F;
  --primary-light: #B995EF;
  --lavender: #E9DDFB;
  --lavender-soft: #F5EDFF;
  --pink: #F4B9DF;
  --pink-light: #FCE6F4;
  --background: #FFF8FD;
  --surface: #FFFFFF;
  --text-primary: #34264B;
  --text-secondary: #85758F;
  --border: #EDE1F5;

  /* 2. Educational Pastel Accents */
  --pastel-mint: #D1FAE5;
  --pastel-mint-dark: #059669;
  --pastel-mint-border: #A7F3D0;
  --pastel-rose: #FFE4E6;
  --pastel-rose-dark: #E11D48;
  --pastel-rose-border: #FECDD3;
  --pastel-amber: #FEF3C7;
  --pastel-amber-dark: #D97706;
  --pastel-amber-border: #FDE68A;
  --pastel-yellow: #FEF08A;

  /* 3. Gradients */
  --grad-header: linear-gradient(135deg, #44246F 0%, #7041B8 60%, #9061DC 100%);
  --grad-primary: linear-gradient(135deg, #7041B8 0%, #9061DC 50%, #EC4899 100%);
  --grad-primary-hover: linear-gradient(135deg, #5B329B 0%, #7E4BC9 50%, #DB2777 100%);
  --grad-pill: linear-gradient(135deg, #F4B9DF 0%, #B995EF 100%);
  --grad-card: linear-gradient(180deg, #FFFFFF 0%, #FFF8FD 100%);
  --grad-badge: linear-gradient(135deg, #E9DDFB 0%, #F4B9DF 100%);
  --grad-progress: linear-gradient(90deg, #7041B8 0%, #B995EF 50%, #F4B9DF 100%);

  /* 4. Geometry & Shadows (Friendly, Soft, Rounded) */
  --radius-card: 28px;
  --radius-inner: 18px;
  --radius-button: 14px;
  --radius-pill: 9999px;
  --shadow-main: 0 16px 48px rgba(112, 65, 184, 0.08), 0 4px 16px rgba(244, 185, 223, 0.12);
  --shadow-card: 0 8px 28px rgba(112, 65, 184, 0.06);
  --shadow-hover: 0 12px 32px rgba(112, 65, 184, 0.18);
  --shadow-glow: 0 0 20px rgba(185, 149, 239, 0.35);

  /* Aliases for backwards compatibility */
  --color-primary: var(--primary);
  --color-primary-hover: var(--primary-dark);
  --color-accent: var(--primary);
  --color-accent-subtle: var(--lavender-soft);
  --color-accent-border: var(--border);
  --color-bg-canvas: var(--background);
  --color-bg-surface: var(--surface);
  --color-bg-subtle: var(--lavender-soft);
  --color-text-main: var(--text-primary);
  --color-text-muted: var(--text-secondary);
  --color-text-subtle: var(--text-secondary);
  --color-border: var(--border);
  --state-correct-bg: var(--pastel-mint);
  --state-correct-border: var(--pastel-mint-dark);
  --state-wrong-bg: var(--pastel-rose);
  --state-wrong-border: var(--pastel-rose-dark);
}

/* Global Reset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

body {
  background-color: var(--background);
  color: var(--text-primary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Subtle Educational Background Texture (Grid, Sparkles & Gentle Blobs) */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    radial-gradient(rgba(185, 149, 239, 0.12) 1.2px, transparent 1.2px),
    radial-gradient(circle at 10% 15%, rgba(244, 185, 223, 0.25) 0%, transparent 40%),
    radial-gradient(circle at 90% 85%, rgba(233, 221, 251, 0.35) 0%, transparent 45%),
    radial-gradient(circle at 85% 15%, rgba(244, 185, 223, 0.2) 0%, transparent 35%),
    radial-gradient(circle at 15% 90%, rgba(185, 149, 239, 0.2) 0%, transparent 40%);
  background-size: 28px 28px, 100% 100%, 100% 100%, 100% 100%, 100% 100%;
  pointer-events: none;
  z-index: -2;
}

/* Floating Math Accents (+, −, ×, ÷, ✦) */
.floating-math-symbol {
  position: absolute;
  font-weight: 800;
  color: var(--primary-light);
  opacity: 0.28;
  user-select: none;
  pointer-events: none;
  z-index: -1;
  animation: floatMath 7s ease-in-out infinite alternate;
}
.float-sym-1 { top: 90px; left: 4%; font-size: 2.2rem; color: var(--pink); animation-delay: 0s; }
.float-sym-2 { top: 220px; right: 5%; font-size: 2rem; color: var(--primary); animation-delay: 1.5s; }
.float-sym-3 { bottom: 120px; left: 6%; font-size: 2.4rem; color: var(--primary-light); animation-delay: 2.5s; }
.float-sym-4 { bottom: 80px; right: 8%; font-size: 2.5rem; color: var(--pink); animation-delay: 3.5s; }
.float-sym-5 { top: 400px; left: 2%; font-size: 1.8rem; color: #F59E0B; opacity: 0.35; animation-delay: 1s; }
.float-sym-6 { top: 340px; right: 3%; font-size: 1.6rem; color: var(--primary); opacity: 0.3; animation-delay: 2s; }

@keyframes floatMath {
  0% { transform: translateY(0px) rotate(0deg); }
  100% { transform: translateY(-14px) rotate(8deg); }
}

/* ========================================================
   HEADER & TOPBAR (DEEP PURPLE TO LAVENDER GRADIENT)
   ======================================================== */
header.cbt-header {
  background: var(--grad-header);
  color: #FFFFFF;
  padding: 14px 28px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 6px 24px rgba(68, 36, 111, 0.18);
  border-bottom: 2px solid rgba(244, 185, 223, 0.3);
}

.cbt-brand {
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand-crest {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.25), rgba(255, 255, 255, 0.08));
  border: 1.5px solid rgba(255, 255, 255, 0.4);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #FFFFFF;
  flex-shrink: 0;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
  transition: transform 0.25s ease;
}

.brand-crest:hover {
  transform: rotate(-6deg) scale(1.05);
}

.cbt-brand-badge {
  background: rgba(255, 255, 255, 0.2);
  color: #FFF;
  border: 1px solid rgba(255, 255, 255, 0.4);
  padding: 3px 10px;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  border-radius: var(--radius-pill);
  text-transform: uppercase;
  display: inline-flex;
  align-items: center;
  gap: 5px;
  backdrop-filter: blur(4px);
}

.cbt-brand-badge::before {
  content: "✨";
  font-size: 0.75rem;
}

.cbt-header h1 {
  font-size: 1.12rem;
  font-weight: 800;
  letter-spacing: -0.01em;
  margin: 0;
  color: #FFFFFF;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.15);
}

.cbt-header p {
  font-size: 0.78rem;
  color: var(--pink-light);
  margin-top: 2px;
  font-weight: 500;
}

.header-tools {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-link-admin {
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: #FFFFFF;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 7px 14px;
  border-radius: var(--radius-pill);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.2s ease;
  backdrop-filter: blur(4px);
}

.nav-link-admin:hover {
  background: rgba(255, 255, 255, 0.28);
  border-color: rgba(255, 255, 255, 0.6);
  transform: translateY(-1px);
}

/* Timer Pill (Soft Pink & Lavender, with Tabular Digits) */
.timer-container {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--grad-pill);
  border: 1.5px solid rgba(255, 255, 255, 0.6);
  padding: 6px 16px;
  border-radius: var(--radius-pill);
  box-shadow: 0 4px 16px rgba(244, 185, 223, 0.45);
  color: var(--primary-dark);
}

.timer-label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--primary-dark);
}

.timer-digits {
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: 0.03em;
  color: var(--primary-dark);
  font-variant-numeric: tabular-nums;
}

/* Exam Progress Bar */
.exam-progress-bar-container {
  width: 100%;
  height: 6px;
  background-color: var(--lavender);
  overflow: hidden;
}

.exam-progress-bar {
  height: 100%;
  width: 0%;
  background: var(--grad-progress);
  transition: width 0.35s ease;
  box-shadow: 0 0 10px rgba(244, 185, 223, 0.8);
}

/* ========================================================
   PORTAL MAIN WRAPPER & DECORATIVE ILLUSTRATIONS
   ======================================================== */
.portal-main-wrapper {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px 20px;
  position: relative;
}

.portal-card-container {
  position: relative;
  width: 100%;
  max-width: 540px;
  margin: 0 auto;
}

/* Decorative Illustration SVGs (Stacked Books & Calculator Ruler) */
.deco-illustration {
  position: absolute;
  pointer-events: none;
  z-index: 2;
  filter: drop-shadow(0 8px 16px rgba(112, 65, 184, 0.12));
  transition: transform 0.3s ease;
}

.deco-books {
  left: -48px;
  bottom: -24px;
}

.deco-calc {
  right: -48px;
  bottom: -24px;
}

/* ========================================================
   PANEL UTAMA (.portal-card) - 28px RADIUS PASTEL CARD
   ======================================================== */
.portal-card {
  width: 100%;
  background: var(--grad-card);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-main);
  overflow: hidden;
  position: relative;
  z-index: 1;
  backdrop-filter: blur(10px);
  animation: cardFadeIn 0.35s ease-out;
}

@keyframes cardFadeIn {
  from { opacity: 0; transform: translateY(14px) scale(0.98); }
  to { opacity: 1; transform: translateY(0) scale(1); }
}

.portal-card-header {
  padding: 30px 32px 18px 32px;
  text-align: center;
  background: linear-gradient(180deg, var(--lavender-soft) 0%, transparent 100%);
  border-bottom: 1px solid var(--border);
  position: relative;
}

.portal-card-header h2 {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--primary-dark);
  letter-spacing: -0.02em;
  margin-bottom: 6px;
}

.portal-card-header p {
  font-size: 0.88rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.portal-card-body {
  padding: 26px 32px 34px 32px;
}

/* Alerts */
.alert {
  padding: 12px 16px;
  border-radius: 14px;
  font-size: 0.84rem;
  font-weight: 600;
  margin-bottom: 18px;
  line-height: 1.45;
  display: flex;
  align-items: center;
  gap: 8px;
}

.alert-error {
  background-color: var(--pastel-rose);
  border: 1.5px solid var(--pastel-rose-border);
  color: var(--pastel-rose-dark);
}

.alert-success {
  background-color: var(--pastel-mint);
  border: 1.5px solid var(--pastel-mint-border);
  color: var(--pastel-mint-dark);
}

/* ========================================================
   FORM CONTROLS (ROUNDED, SOFT SHADOW, LAVENDER BORDER)
   ======================================================== */
.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-size: 0.84rem;
  font-weight: 700;
  color: var(--primary-dark);
  margin-bottom: 7px;
}

.form-control, .input-text, .select-dropdown {
  width: 100%;
  padding: 12px 16px;
  font-size: 0.92rem;
  font-family: inherit;
  color: var(--text-primary);
  background-color: #FFFFFF;
  border: 1.5px solid var(--border);
  border-radius: 14px;
  outline: none;
  transition: all 0.2s ease;
  box-shadow: 0 2px 6px rgba(112, 65, 184, 0.03);
  box-sizing: border-box;
}

.form-control:focus, .input-text:focus, .select-dropdown:focus {
  border-color: var(--primary);
  background-color: #FFFFFF;
  box-shadow: 0 0 0 3px rgba(185, 149, 239, 0.25);
}

.form-control::placeholder, .input-text::placeholder {
  color: #B4A7BE;
}

.select-dropdown {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='none' stroke='%237041B8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M4 6l4 4 4-4'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 42px;
}

/* ========================================================
   BUTTONS (PASTEL GRADIENTS, ROUNDED, HOVER LIFT EFFECT)
   ======================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  font-size: 0.92rem;
  font-weight: 700;
  border-radius: var(--radius-button);
  cursor: pointer;
  border: none;
  outline: none;
  text-decoration: none;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 4px 14px rgba(112, 65, 184, 0.12);
  box-sizing: border-box;
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background: var(--grad-primary);
  color: #FFFFFF;
  box-shadow: 0 6px 20px rgba(112, 65, 184, 0.28);
}

.btn-primary:hover {
  background: var(--grad-primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 10px 26px rgba(112, 65, 184, 0.38);
}

.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none !important;
}

.btn-outline {
  background: #FFFFFF;
  color: var(--primary);
  border: 1.5px solid var(--border);
  box-shadow: 0 2px 6px rgba(112, 65, 184, 0.05);
}

.btn-outline:hover {
  background: var(--lavender-soft);
  border-color: var(--primary-light);
  color: var(--primary-dark);
  transform: translateY(-1px);
}

.btn-font-size {
  cursor: pointer;
  transition: all 0.15s ease;
  user-select: none;
  font-weight: 700 !important;
}

.btn-font-size:hover {
  border-color: var(--primary) !important;
  color: var(--primary-dark) !important;
}

.btn-font-size.active {
  background: var(--lavender) !important;
  border-color: var(--primary) !important;
  color: var(--primary-dark) !important;
  box-shadow: 0 0 0 2px rgba(112, 65, 184, 0.25) !important;
}

.btn-full {
  width: 100%;
}

/* Student Badge Card (Step 2) */
.student-badge-card {
  background: linear-gradient(135deg, #FAF5FF 0%, #FFF8FD 100%);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-inner);
  padding: 18px 20px;
  box-shadow: 0 4px 14px rgba(112, 65, 184, 0.05);
}

.student-badge-title {
  font-size: 0.72rem;
  font-weight: 800;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.student-badge-name {
  font-size: 1.15rem;
  font-weight: 800;
  color: var(--primary-dark);
  margin: 4px 0 2px 0;
}

.student-badge-meta {
  font-size: 0.82rem;
  color: var(--text-secondary);
}

/* ========================================================
   CBT EXAM UI (SPLIT VIEW, READING PANE, OPTIONS)
   ======================================================== */
#quiz-container {
  max-width: 1320px;
  width: 100%;
  margin: 0 auto;
  padding: 24px 20px 40px 20px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* Navigation Palette Card */
.cbt-nav-bar {
  background: #FFFFFF;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-inner);
  padding: 16px 20px;
  box-shadow: var(--shadow-card);
}

.cbt-nav-title {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}

.cbt-nav-legend {
  display: flex;
  gap: 14px;
  font-size: 0.76rem;
  font-weight: 600;
  color: var(--text-secondary);
  flex-wrap: wrap;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.legend-box {
  width: 12px;
  height: 12px;
  border-radius: 4px;
  background-color: #FFFFFF;
  border: 1.5px solid var(--border);
}

.legend-box.answered {
  background: var(--primary);
  border-color: var(--primary);
}

.legend-box.skipped {
  background: var(--pink);
  border-color: #F472B6;
}

.question-nav-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(42px, 1fr));
  gap: 8px;
}

.nav-btn {
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 700;
  font-family: 'JetBrains Mono', monospace;
  font-variant-numeric: tabular-nums;
  border-radius: 12px;
  cursor: pointer;
  border: 1.5px solid var(--border);
  background-color: #FFFFFF;
  color: var(--text-secondary);
  transition: all 0.2s ease;
}

.nav-btn:hover {
  border-color: var(--primary-light);
  color: var(--primary-dark);
  transform: scale(1.05);
}

.nav-btn.answered {
  background: var(--grad-primary);
  color: #FFFFFF;
  border-color: transparent;
  box-shadow: 0 4px 10px rgba(112, 65, 184, 0.22);
}

.nav-btn.skipped {
  background: linear-gradient(135deg, var(--pink) 0%, #F472B6 100%);
  color: var(--primary-dark);
  border-color: transparent;
  font-weight: 800;
}

.nav-btn.active {
  border-color: var(--primary) !important;
  box-shadow: 0 0 0 3px rgba(185, 149, 239, 0.5) !important;
  transform: scale(1.08);
}

/* Split View Panes */
.split-view {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  align-items: stretch;
}

/* Mode Soal Tanpa Stimulus / Wacana (Clean & Full Width) */
.split-view.no-stimulus {
  grid-template-columns: 1fr;
}

.split-view.no-stimulus .reading-pane {
  display: none !important;
}

.split-view.no-stimulus .question-pane {
  width: 100%;
}

.reading-pane, .question-pane {
  background: #FFFFFF;
  border: 1.5px solid var(--border);
  border-radius: 24px;
  padding: 24px 28px;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
}

.pane-heading {
  font-size: 0.95rem;
  font-weight: 800;
  color: var(--primary-dark);
  padding-bottom: 14px;
  margin-bottom: 18px;
  border-bottom: 1.5px solid var(--lavender-soft);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.reading-content {
  font-size: 0.96rem;
  line-height: 1.75;
  color: var(--text-primary);
  overflow-y: auto;
  max-height: 540px;
  padding-right: 6px;
}

.question-prompt {
  margin-bottom: 20px;
  font-size: 1.05rem;
  line-height: 1.65;
  font-weight: 700;
  color: var(--primary-dark);
}

/* Option Cards (Rounded Pastel) */
.option-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 18px;
  margin-bottom: 12px;
  border: 1.5px solid var(--border);
  border-radius: 16px;
  background-color: #FFFFFF;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 2px 6px rgba(112, 65, 184, 0.02);
  min-height: 52px;
  box-sizing: border-box;
}

.option-item:last-child {
  margin-bottom: 0;
}

.option-item:hover {
  border-color: var(--primary-light);
  background-color: var(--lavender-soft);
  transform: translateX(4px);
}

.option-item.selected {
  background: var(--lavender-soft);
  border-color: var(--primary);
  box-shadow: 0 4px 16px rgba(112, 65, 184, 0.12);
}

.option-letter-badge {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.88rem;
  background: var(--lavender);
  color: var(--primary-dark);
  flex-shrink: 0;
  transition: all 0.2s ease;
}

.option-item.selected .option-letter-badge {
  background: var(--grad-primary);
  color: #FFFFFF;
  box-shadow: 0 2px 8px rgba(112, 65, 184, 0.3);
}

.option-text-body {
  font-size: 0.95rem;
  line-height: 1.5;
  color: var(--text-primary);
  font-weight: 600;
  flex: 1;
}

.rich-img-container {
  text-align: center;
  margin: 18px 0 10px 0;
}

.rich-img-container img {
  max-width: 100%;
  max-height: 320px;
  border-radius: 16px;
  border: 1.5px solid var(--border);
  box-shadow: 0 4px 14px rgba(112, 65, 184, 0.06);
  object-fit: contain;
  background: #ffffff;
  display: inline-block;
}

.opt-img-wrap img {
  max-width: 100%;
  max-height: 220px;
  border-radius: 10px;
  border: 1px solid var(--border);
  object-fit: contain;
  background: #ffffff;
  display: block;
}

/* True / False Table */
.tf-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 10px;
  border-radius: 14px;
  overflow: hidden;
  border: 1.5px solid var(--border);
}

.tf-table th {
  background: var(--lavender-soft);
  color: var(--primary-dark);
  font-weight: 800;
  font-size: 0.85rem;
  padding: 12px 14px;
  text-align: center;
}

.tf-table th:first-child {
  text-align: left;
}

.tf-table td {
  padding: 12px 14px;
  border-top: 1px solid var(--border);
  font-size: 0.9rem;
  color: var(--text-primary);
}

.tf-table td:nth-child(2), .tf-table td:nth-child(3) {
  text-align: center;
  width: 70px;
}

.tf-table input[type="radio"] {
  accent-color: var(--primary);
  transform: scale(1.2);
  cursor: pointer;
}

/* Bottom Action Bar */
.cbt-action-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: #FFFFFF;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-inner);
  padding: 16px 24px;
  box-shadow: var(--shadow-card);
}

.btn-nav-prev {
  background: #FFFFFF;
  color: var(--primary);
  border: 1.5px solid var(--border);
}

.btn-nav-prev:hover {
  background: var(--lavender-soft);
  border-color: var(--primary-light);
}

.btn-nav-skip {
  background: #FFF1F2;
  color: #BE123C;
  border: 1.5px solid #FECDD3;
}

.btn-nav-skip:hover {
  background: #FFE4E6;
  transform: translateY(-1px);
}

.btn-nav-next {
  background: var(--grad-primary);
  color: #FFFFFF;
}

.btn-nav-next:hover {
  background: var(--grad-primary-hover);
  transform: translateY(-2px);
}

.btn-nav-finish {
  background: linear-gradient(135deg, #059669 0%, #10B981 100%);
  color: #FFFFFF;
  box-shadow: 0 4px 14px rgba(16, 185, 129, 0.3);
}

.btn-nav-finish:hover {
  background: linear-gradient(135deg, #047857 0%, #059669 100%);
  transform: translateY(-2px);
}

/* ========================================================
   SCREEN 3: HASIL UJIAN (PASTEL SCORE CARD)
   ======================================================== */
#result-screen {
  display: none;
  max-width: 1040px;
  width: 100%;
  margin: 0 auto;
  padding: 32px 20px 48px 20px;
}

.receipt-card {
  background: var(--grad-card);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-main);
  padding: 32px;
  margin-bottom: 24px;
  position: relative;
  overflow: hidden;
}

.receipt-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 6px;
  background: var(--grad-progress);
}

.receipt-title {
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--primary-dark);
  text-align: center;
  margin-bottom: 4px;
}

.receipt-meta {
  font-size: 0.88rem;
  color: var(--text-secondary);
  text-align: center;
  margin-bottom: 24px;
}

.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.stat-box {
  border-radius: 18px;
  padding: 16px 14px;
  text-align: center;
  border: 1.5px solid var(--border);
  transition: transform 0.2s ease;
}

.stat-box:hover {
  transform: translateY(-2px);
}

.stat-box.correct {
  background: var(--pastel-mint);
  border-color: var(--pastel-mint-border);
  color: var(--pastel-mint-dark);
}

.stat-box.wrong {
  background: var(--pastel-rose);
  border-color: var(--pastel-rose-border);
  color: var(--pastel-rose-dark);
}

.stat-box.empty {
  background: var(--pastel-amber);
  border-color: var(--pastel-amber-border);
  color: var(--pastel-amber-dark);
}

.stat-box.score {
  background: var(--grad-header);
  border-color: var(--primary);
  color: #FFFFFF;
  box-shadow: 0 6px 18px rgba(112, 65, 184, 0.25);
}

.stat-box-label {
  font-size: 0.74rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 4px;
  opacity: 0.9;
}

.stat-box-num {
  font-size: 1.6rem;
  font-weight: 900;
  font-family: 'JetBrains Mono', monospace;
  font-variant-numeric: tabular-nums;
}

/* Review Navigation Grid */
.review-nav-btn {
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 700;
  font-family: 'JetBrains Mono', monospace;
  font-variant-numeric: tabular-nums;
  border-radius: 12px;
  cursor: pointer;
  border: 1.5px solid var(--border);
  background-color: #FFFFFF;
  transition: all 0.2s ease;
}

.review-nav-btn.correct {
  background-color: var(--pastel-mint);
  border-color: var(--pastel-mint-border);
  color: var(--pastel-mint-dark);
}

.review-nav-btn.wrong {
  background-color: var(--pastel-rose);
  border-color: var(--pastel-rose-border);
  color: var(--pastel-rose-dark);
}

.review-nav-btn.empty {
  background-color: var(--pastel-amber);
  border-color: var(--pastel-amber-border);
  color: var(--pastel-amber-dark);
}

.review-nav-btn.active {
  box-shadow: 0 0 0 3px rgba(112, 65, 184, 0.4) !important;
  transform: scale(1.08);
}

/* Status Badges */
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.badge-correct {
  background: var(--pastel-mint);
  color: var(--pastel-mint-dark);
  border: 1px solid var(--pastel-mint-border);
}

.badge-wrong {
  background: var(--pastel-rose);
  color: var(--pastel-rose-dark);
  border: 1px solid var(--pastel-rose-border);
}

.badge-empty {
  background: var(--pastel-amber);
  color: var(--pastel-amber-dark);
  border: 1px solid var(--pastel-amber-border);
}

/* ========================================================
   MODALS (ROUNDED PASTEL CONFIRMATION)
   ======================================================== */
.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(52, 38, 75, 0.45);
  backdrop-filter: blur(6px);
  z-index: 1000;
  align-items: center;
  justify-content: center;
  padding: 20px;
  animation: modalFadeIn 0.2s ease-out;
}

@keyframes modalFadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.modal-content {
  background: #FFFFFF;
  border-radius: 28px;
  max-width: 440px;
  width: 100%;
  padding: 32px 28px;
  box-shadow: var(--shadow-main);
  border: 1.5px solid var(--border);
  position: relative;
  animation: modalScaleUp 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes modalScaleUp {
  from { transform: scale(0.92); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

/* Footer */
footer {
  margin-top: auto;
  background: #FFFFFF;
  border-top: 1.5px solid var(--border);
  padding: 18px 24px;
  font-size: 0.8rem;
  color: var(--text-secondary);
  text-align: center;
}

/* ========================================================
   RESPONSIVE DESIGN (TABLET & MOBILE)
   ======================================================== */
@media (max-width: 992px) {
  .split-view {
    grid-template-columns: 1fr;
  }
  .reading-pane {
    max-height: 260px;
  }
  .stats-bar {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  header.cbt-header {
    padding: 12px 16px;
  }
  .cbt-header h1 {
    font-size: 0.98rem;
  }
  .cbt-brand-badge {
    display: none;
  }
  .portal-card {
    border-radius: 24px;
  }
  .portal-card-header, .portal-card-body {
    padding: 22px 20px;
  }
  .deco-illustration {
    display: none; /* Hide edge illustrations on small mobile screens to prevent clutter */
  }
  .cbt-action-bar {
    flex-direction: column;
    gap: 12px;
  }
  .cbt-action-bar > div {
    width: 100%;
    display: flex;
    justify-content: space-between;
  }
  .stats-bar {
    grid-template-columns: 1fr 1fr;
    gap: 10px;
  }
}

@media (max-width: 480px) {
  .portal-main-wrapper {
    padding: 20px 14px;
  }
  .stats-bar {
    grid-template-columns: 1fr;
  }
}

/* ==========================================================================
   CUSTOM ANIMATED PASTEL POPUP MODAL (Alert & Confirm)
   ========================================================================== */
.custom-modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 999999;
  background: rgba(52, 38, 75, 0.48);
  backdrop-filter: blur(8px) saturate(160%);
  -webkit-backdrop-filter: blur(8px) saturate(160%);
  display: none;
  align-items: center;
  justify-content: center;
  padding: 18px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.24s ease, visibility 0.24s ease;
}

.custom-modal-backdrop.show {
  opacity: 1;
  visibility: visible;
}

.custom-modal-card {
  background: #FFFFFF;
  border-radius: 28px;
  width: 100%;
  max-width: 440px;
  padding: 34px 28px 26px 28px;
  box-shadow: 
    0 24px 60px -12px rgba(112, 65, 184, 0.28),
    0 0 0 1.5px rgba(233, 221, 251, 0.85),
    0 2px 8px rgba(0, 0, 0, 0.04);
  text-align: center;
  transform: scale(0.82) translateY(20px);
  opacity: 0;
  transition: transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1), opacity 0.24s ease;
  position: relative;
  overflow: hidden;
}

.custom-modal-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 6px;
  background: linear-gradient(90deg, #7041B8, #B995EF, #F4B9DF, #E9DDFB);
}

.custom-modal-backdrop.show .custom-modal-card {
  transform: scale(1) translateY(0);
  opacity: 1;
}

.custom-modal-icon-wrap {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  margin: 0 auto 18px auto;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 22px rgba(112, 65, 184, 0.12);
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.custom-modal-backdrop.show .custom-modal-icon-wrap {
  transform: scale(1.05);
}

.custom-modal-icon-wrap.danger {
  background: linear-gradient(135deg, #FEE2E2 0%, #FCE6F4 100%);
  color: #DC2626;
  border: 2px solid #FECACA;
}

.custom-modal-icon-wrap.warning {
  background: linear-gradient(135deg, #FEF3C7 0%, #FCE6F4 100%);
  color: #D97706;
  border: 2px solid #FDE68A;
}

.custom-modal-icon-wrap.success {
  background: linear-gradient(135deg, #DCFCE7 0%, #E9DDFB 100%);
  color: #16A34A;
  border: 2px solid #BBF7D0;
}

.custom-modal-icon-wrap.info {
  background: linear-gradient(135deg, #E9DDFB 0%, #F5EDFF 100%);
  color: #7041B8;
  border: 2px solid #D8B4FE;
}

.custom-modal-title {
  font-family: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  font-size: 1.25rem;
  font-weight: 800;
  color: #34264B;
  margin: 0 0 10px 0;
  letter-spacing: -0.01em;
}

.custom-modal-message {
  font-family: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  font-size: 0.95rem;
  line-height: 1.6;
  color: #64748B;
  margin: 0 0 24px 0;
  word-break: break-word;
}

.custom-modal-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

.custom-modal-btn {
  font-family: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
  padding: 11px 24px;
  border-radius: 9999px;
  font-size: 0.92rem;
  font-weight: 700;
  cursor: pointer;
  border: none;
  outline: none;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 115px;
}

.custom-modal-btn-cancel {
  background: #F5EDFF;
  border: 1.5px solid #EDE1F5;
  color: #7041B8;
}

.custom-modal-btn-cancel:hover {
  background: #E9DDFB;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(112, 65, 184, 0.12);
}

.custom-modal-btn-confirm {
  background: linear-gradient(135deg, #7041B8 0%, #8A53D9 100%);
  color: #FFFFFF;
  box-shadow: 0 4px 16px rgba(112, 65, 184, 0.32);
}

.custom-modal-btn-confirm:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(112, 65, 184, 0.42);
}

.custom-modal-btn-confirm.danger {
  background: linear-gradient(135deg, #EF4444 0%, #DC2626 100%);
  box-shadow: 0 4px 16px rgba(220, 38, 38, 0.32);
}

.custom-modal-btn-confirm.danger:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(220, 38, 38, 0.42);
}

.custom-modal-btn:active {
  transform: translateY(0);
}

@media (max-width: 480px) {
  .custom-modal-card {
    padding: 26px 18px 20px 18px;
    border-radius: 24px;
  }
  .custom-modal-actions {
    flex-direction: column-reverse;
    gap: 8px;
  }
  .custom-modal-btn {
    width: 100%;
  }
}