@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600;700&display=swap');

:root {
  /* HSL Color System */
  --bg-main: hsl(222, 25%, 8%);
  --bg-sidebar: hsl(222, 25%, 5%);
  --bg-card: hsla(222, 25%, 12%, 0.6);
  --bg-card-hover: hsla(222, 25%, 16%, 0.8);
  --border-color: hsla(222, 20%, 25%, 0.4);
  --border-color-active: hsla(260, 80%, 65%, 0.6);
  
  --primary: hsl(260, 85%, 62%);
  --primary-glow: hsla(260, 85%, 62%, 0.4);
  --secondary: hsl(180, 80%, 45%);
  --secondary-glow: hsla(180, 80%, 45%, 0.4);
  
  --text-main: hsl(210, 30%, 96%);
  --text-muted: hsl(215, 15%, 70%);
  --text-dim: hsl(215, 12%, 50%);
  
  --success: hsl(142, 75%, 45%);
  --success-glow: hsla(142, 75%, 45%, 0.3);
  --warning: hsl(38, 92%, 50%);
  --error: hsl(350, 80%, 55%);
  --error-glow: hsla(350, 80%, 55%, 0.3);
  --review: hsl(280, 80%, 60%);
  --review-glow: hsla(280, 80%, 60%, 0.3);

  --font-sans: 'Outfit', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  --shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.5);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Global Reset & Base */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  scrollbar-width: thin;
  scrollbar-color: var(--border-color) transparent;
}

::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--primary);
}

body {
  font-family: var(--font-sans);
  background-color: var(--bg-main);
  color: var(--text-main);
  min-height: 100vh;
  display: flex;
  overflow: hidden;
  line-height: 1.5;
}

/* Base App Layout */
.app-container {
  display: flex;
  width: 100%;
  height: 100vh;
}

/* Sidebar Navigation */
.sidebar {
  width: 280px;
  background-color: var(--bg-sidebar);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 24px;
  flex-shrink: 0;
  z-index: 10;
}

.logo-container {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 36px;
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 20px;
  color: white;
  box-shadow: 0 0 15px var(--primary-glow);
}

.logo-text h1 {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.5px;
  background: linear-gradient(135deg, #ffffff, var(--text-muted));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.logo-text p {
  font-size: 11px;
  color: var(--secondary);
  font-weight: 600;
  letter-spacing: 1px;
}

.nav-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex-grow: 1;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 16px;
  border-radius: 12px;
  cursor: pointer;
  color: var(--text-muted);
  font-weight: 500;
  font-size: 15px;
  transition: var(--transition);
  border: 1px solid transparent;
}

.nav-item:hover {
  background: var(--bg-card);
  color: var(--text-main);
  border-color: var(--border-color);
}

.nav-item.active {
  background: linear-gradient(90deg, hsla(260, 85%, 62%, 0.15), transparent);
  color: var(--text-main);
  border-left: 3px solid var(--primary);
  border-color: var(--border-color);
}

.nav-item svg {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  transition: var(--transition);
}

.nav-item.active svg {
  color: var(--primary);
  filter: drop-shadow(0 0 5px var(--primary));
}

.sidebar-footer {
  margin-top: auto;
  border-top: 1px solid var(--border-color);
  padding-top: 20px;
  font-size: 12px;
  color: var(--text-dim);
  text-align: center;
}

/* Main Display Container */
.main-content {
  flex-grow: 1;
  height: 100vh;
  overflow-y: auto;
  padding: 40px;
  position: relative;
  background-radial: radial-gradient(circle at top right, hsla(260, 85%, 62%, 0.05), transparent 60%);
}

.content-section {
  display: none;
  animation: fadeIn 0.4s ease;
}

.content-section.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Global Typography & Headers */
h2.section-title {
  font-size: 32px;
  font-weight: 800;
  margin-bottom: 8px;
  letter-spacing: -0.5px;
  background: linear-gradient(135deg, #ffffff, var(--text-muted));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

p.section-subtitle {
  color: var(--text-muted);
  font-size: 16px;
  margin-bottom: 32px;
}

/* Glassmorphism Containers */
.glass-card {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  padding: 24px;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.glass-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-color-active);
  box-shadow: 0 10px 40px 0 rgba(0, 0, 0, 0.6);
}

/* Cockpit Dashboard Grid */
.dashboard-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 24px;
  margin-bottom: 24px;
}

.dashboard-row-full {
  grid-column: span 2;
}

/* Stats Progress Cards */
.stats-container {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 24px;
}

.stat-card {
  display: flex;
  align-items: center;
  gap: 20px;
  position: relative;
  overflow: hidden;
}

.stat-icon {
  width: 50px;
  height: 50px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
}

.stat-icon.phy { background: hsla(260, 85%, 62%, 0.15); color: var(--primary); border: 1px solid var(--primary); }
.stat-icon.chem { background: hsla(180, 80%, 45%, 0.15); color: var(--secondary); border: 1px solid var(--secondary); }
.stat-icon.math { background: hsla(142, 75%, 45%, 0.15); color: var(--success); border: 1px solid var(--success); }

.stat-info h3 {
  font-size: 24px;
  font-weight: 700;
  line-height: 1.2;
}

.stat-info p {
  font-size: 13px;
  color: var(--text-muted);
  font-weight: 500;
}

.stat-progress-bar {
  position: absolute;
  bottom: 0;
  left: 0;
  height: 4px;
  background: var(--primary);
  width: 0;
  transition: width 0.8s ease;
}

.stat-card.chem .stat-progress-bar { background: var(--secondary); }
.stat-card.math .stat-progress-bar { background: var(--success); }

/* Circle Progress Overlay */
.progress-ring-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  text-align: center;
}

.progress-ring {
  position: relative;
  width: 140px;
  height: 140px;
}

.progress-ring circle {
  fill: transparent;
  stroke-width: 10;
}

.progress-ring-bg {
  stroke: var(--border-color);
}

.progress-ring-bar {
  stroke: url(#glow-grad);
  stroke-linecap: round;
  transform: rotate(-90deg);
  transform-origin: 50% 50%;
  transition: stroke-dashoffset 0.8s ease;
}

.progress-text {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  font-size: 28px;
  font-weight: 800;
  color: var(--text-main);
  font-family: var(--font-mono);
}

/* Daily Motivation Banner */
.motivation-banner {
  background: linear-gradient(135deg, hsla(260, 85%, 62%, 0.15), hsla(180, 80%, 45%, 0.1));
  border-left: 4px solid var(--primary);
  border-radius: 16px;
  padding: 20px 24px;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 20px;
}

.quote-icon {
  font-size: 28px;
  color: var(--primary);
}

.quote-text blockquote {
  font-size: 15px;
  font-style: italic;
  font-weight: 500;
  color: var(--text-main);
  margin-bottom: 4px;
}

.quote-text cite {
  font-size: 12px;
  color: var(--secondary);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* Syllabus Tracker Panel */
.tracker-controls {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.search-input {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 12px 20px;
  color: var(--text-main);
  font-family: var(--font-sans);
  font-size: 14px;
  outline: none;
  min-width: 250px;
  transition: var(--transition);
}

.search-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 10px var(--primary-glow);
}

.filter-btn-group {
  display: flex;
  gap: 8px;
}

.filter-btn {
  background: transparent;
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  border-radius: 10px;
  padding: 8px 16px;
  font-size: 14px;
  cursor: pointer;
  transition: var(--transition);
  font-family: var(--font-sans);
  font-weight: 500;
}

.filter-btn:hover {
  background: var(--bg-card);
  color: var(--text-main);
}

.filter-btn.active {
  background: var(--primary);
  border-color: var(--primary);
  color: white;
  box-shadow: 0 4px 15px var(--primary-glow);
}

.syllabus-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 20px;
}

.chapter-card {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 16px;
}

.chapter-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 8px;
}

.chapter-info h4 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 4px;
}

.chapter-info .subject-tag {
  font-size: 11px;
  text-transform: uppercase;
  font-weight: 700;
  letter-spacing: 0.5px;
  padding: 2px 8px;
  border-radius: 6px;
  display: inline-block;
}

.subject-tag.phy { background: hsla(260, 85%, 62%, 0.15); color: var(--primary); }
.subject-tag.chem { background: hsla(180, 80%, 45%, 0.15); color: var(--secondary); }
.subject-tag.math { background: hsla(142, 75%, 45%, 0.15); color: var(--success); }

.class-tag {
  background: var(--border-color);
  color: var(--text-muted);
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 6px;
  font-weight: 600;
}

.weightage-row {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.weightage-badge {
  font-size: 11px;
  padding: 4px 8px;
  border-radius: 8px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 4px;
  border: 1px solid transparent;
}

.weightage-badge.mains { background: rgba(255, 255, 255, 0.05); border-color: var(--border-color); color: var(--text-muted); }
.weightage-badge.adv { background: rgba(255, 255, 255, 0.05); border-color: var(--border-color); color: var(--text-muted); }
.weightage-badge.high { background: rgba(230, 80, 80, 0.1); border-color: rgba(230, 80, 80, 0.2); color: var(--error); }

.chapter-topics {
  list-style: none;
  font-size: 13px;
  color: var(--text-muted);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.chapter-topics li {
  position: relative;
  padding-left: 14px;
}

.chapter-topics li::before {
  content: "•";
  position: absolute;
  left: 0;
  color: var(--secondary);
}

.chapter-card-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--border-color);
  padding-top: 14px;
  margin-top: auto;
}

.status-selector {
  background: var(--bg-main);
  border: 1px solid var(--border-color);
  color: var(--text-muted);
  padding: 6px 12px;
  border-radius: 8px;
  font-size: 12px;
  outline: none;
  cursor: pointer;
  font-family: var(--font-sans);
  font-weight: 600;
  transition: var(--transition);
}

.status-selector:focus {
  border-color: var(--primary);
}

.status-selector option {
  background: var(--bg-main);
  color: var(--text-main);
}

.status-selector.completed {
  border-color: var(--success);
  color: var(--success);
  background: hsla(142, 75%, 45%, 0.05);
}

.status-selector.in-progress {
  border-color: var(--warning);
  color: var(--warning);
  background: hsla(38, 92%, 50%, 0.05);
}

.status-selector.not-started {
  border-color: var(--border-color);
  color: var(--text-muted);
}

/* Formula Cheatsheet Flipping Cards */
.formula-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(400px, 1fr));
  gap: 24px;
}

.formula-card {
  perspective: 1000px;
  height: 250px;
  cursor: pointer;
}

.formula-card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transition: transform 0.6s;
  transform-style: preserve-3d;
}

.formula-card.flipped .formula-card-inner {
  transform: rotateY(180deg);
}

.formula-card-front, .formula-card-back {
  position: absolute;
  width: 100%;
  height: 100%;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
  border-radius: 20px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.formula-card-front {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-main);
}

.formula-card-front:hover {
  border-color: var(--border-color-active);
}

.formula-card-back {
  background: linear-gradient(135deg, hsla(222, 25%, 15%, 0.95), hsla(222, 25%, 10%, 0.95));
  border: 1px solid var(--primary);
  color: var(--text-main);
  transform: rotateY(180deg);
  overflow-y: auto;
}

.formula-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.formula-card-header h4 {
  font-size: 18px;
  font-weight: 700;
}

.formula-subject-badge {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  padding: 4px 8px;
  border-radius: 6px;
}

.formula-math-display {
  background: hsla(0, 0%, 0%, 0.2);
  border-radius: 12px;
  padding: 16px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--secondary);
  overflow-x: auto;
  border: 1px dashed var(--border-color);
  margin: auto 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.formula-card-back p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
}

.flip-prompt {
  font-size: 11px;
  color: var(--text-dim);
  text-align: right;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* CBT Mock Test Simulation Container */
.test-selection-panel {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
}

.test-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  gap: 20px;
}

.test-card-header h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 8px;
}

.test-meta {
  display: flex;
  gap: 12px;
  font-size: 13px;
  color: var(--text-muted);
}

.cbt-container {
  display: grid;
  grid-template-columns: 3fr 1fr;
  gap: 24px;
  height: calc(100vh - 120px);
  position: relative;
}

.cbt-left-pane {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  height: 100%;
  overflow: hidden;
}

.cbt-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 16px;
  margin-bottom: 16px;
}

.cbt-title {
  font-size: 18px;
  font-weight: 700;
}

.cbt-timer {
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
  color: var(--error);
  text-shadow: 0 0 10px var(--error-glow);
  background: rgba(230, 80, 80, 0.1);
  padding: 6px 16px;
  border-radius: 8px;
  border: 1px solid rgba(230, 80, 80, 0.2);
  display: flex;
  align-items: center;
  gap: 8px;
}

.cbt-body-scroll {
  flex-grow: 1;
  overflow-y: auto;
  padding-right: 12px;
}

.cbt-subject-tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 8px;
}

.cbt-tab {
  background: transparent;
  border: 1px solid transparent;
  color: var(--text-muted);
  padding: 8px 16px;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 600;
  font-size: 14px;
  transition: var(--transition);
}

.cbt-tab.active {
  background: var(--bg-card);
  border-color: var(--border-color);
  color: var(--text-main);
  border-bottom: 2px solid var(--primary);
}

.cbt-question-content {
  animation: fadeIn 0.3s ease;
}

.cbt-question-number {
  font-size: 16px;
  font-weight: 600;
  color: var(--secondary);
  margin-bottom: 8px;
}

.cbt-question-type {
  font-size: 11px;
  text-transform: uppercase;
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-muted);
  padding: 2px 8px;
  border-radius: 4px;
  display: inline-block;
  margin-bottom: 16px;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.cbt-question-text {
  font-size: 16px;
  line-height: 1.6;
  margin-bottom: 24px;
  white-space: pre-line;
}

.cbt-options-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 24px;
}

.cbt-option-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  cursor: pointer;
  transition: var(--transition);
}

.cbt-option-item:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--primary-glow);
}

.cbt-option-item.selected {
  background: hsla(260, 85%, 62%, 0.08);
  border-color: var(--primary);
}

.cbt-option-item input[type="radio"], .cbt-option-item input[type="checkbox"] {
  width: 20px;
  height: 20px;
  accent-color: var(--primary);
  cursor: pointer;
}

.cbt-numerical-input {
  background: var(--bg-main);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 16px;
  color: var(--text-main);
  font-size: 18px;
  font-family: var(--font-mono);
  outline: none;
  width: 200px;
  transition: var(--transition);
}

.cbt-numerical-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 10px var(--primary-glow);
}

.cbt-action-footer {
  display: flex;
  justify-content: space-between;
  border-top: 1px solid var(--border-color);
  padding-top: 16px;
  margin-top: 16px;
  flex-wrap: wrap;
  gap: 12px;
}

/* Premium Buttons */
.btn {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 12px 24px;
  border-radius: 12px;
  font-family: var(--font-sans);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 8px;
}

.btn:hover {
  background: rgba(255, 255, 255, 0.05);
  border-color: var(--text-muted);
}

.btn-primary {
  background: var(--primary);
  border-color: var(--primary);
  color: white;
  box-shadow: 0 4px 15px var(--primary-glow);
}

.btn-primary:hover {
  background: hsl(260, 85%, 68%);
  border-color: hsl(260, 85%, 68%);
  box-shadow: 0 6px 20px var(--primary-glow);
}

.btn-secondary {
  background: var(--secondary);
  border-color: var(--secondary);
  color: white;
  box-shadow: 0 4px 15px var(--secondary-glow);
}

.btn-secondary:hover {
  background: hsl(180, 80%, 50%);
  border-color: hsl(180, 80%, 50%);
}

.btn-success {
  background: var(--success);
  border-color: var(--success);
  color: white;
  box-shadow: 0 4px 15px var(--success-glow);
}

.btn-success:hover {
  background: hsl(142, 75%, 50%);
  border-color: hsl(142, 75%, 50%);
}

.btn-danger {
  background: var(--error);
  border-color: var(--error);
  color: white;
  box-shadow: 0 4px 15px var(--error-glow);
}

.btn-danger:hover {
  background: hsl(350, 80%, 60%);
  border-color: hsl(350, 80%, 60%);
}

/* CBT Right Grid Sidebar */
.cbt-right-pane {
  display: flex;
  flex-direction: column;
  gap: 16px;
  height: 100%;
}

.cbt-profile-box {
  display: flex;
  align-items: center;
  gap: 12px;
  background: rgba(255, 255, 255, 0.02);
  border-radius: 12px;
  padding: 12px;
  border: 1px solid var(--border-color);
}

.cbt-avatar {
  width: 40px;
  height: 40px;
  background: var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: white;
}

.cbt-user-info h5 {
  font-size: 14px;
  font-weight: 600;
}

.cbt-user-info p {
  font-size: 11px;
  color: var(--text-muted);
}

.question-palette-container {
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.palette-title {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 12px;
}

.palette-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
  overflow-y: auto;
  max-height: 250px;
  padding: 4px;
}

.palette-circle {
  width: 100%;
  aspect-ratio: 1;
  border-radius: 50%;
  border: 2px solid var(--border-color);
  background: var(--bg-main);
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 14px;
  cursor: pointer;
  transition: var(--transition);
}

.palette-circle:hover {
  border-color: var(--text-main);
}

.palette-circle.active {
  border-color: var(--primary);
  box-shadow: 0 0 8px var(--primary-glow);
}

/* Question Circle States based on Official CBT */
.palette-circle.not-visited {
  background: var(--bg-main);
  color: var(--text-muted);
  border-color: var(--border-color);
}

.palette-circle.not-answered {
  background: var(--error);
  color: white;
  border-color: var(--error);
}

.palette-circle.answered {
  background: var(--success);
  color: white;
  border-color: var(--success);
}

.palette-circle.marked-for-review {
  background: var(--review);
  color: white;
  border-color: var(--review);
}

/* Palette Legend */
.legend-box {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  background: rgba(255, 255, 255, 0.02);
  border-radius: 12px;
  padding: 12px;
  border: 1px solid var(--border-color);
  font-size: 11px;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-muted);
}

.legend-color {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  border: 1px solid var(--border-color);
}

.legend-color.not-visited { background: var(--bg-main); }
.legend-color.not-answered { background: var(--error); }
.legend-color.answered { background: var(--success); }
.legend-color.marked-for-review { background: var(--review); }

/* CBT Test Results/Scoreboard Panel */
.results-container {
  max-width: 800px;
  margin: 0 auto;
  animation: fadeIn 0.4s ease;
}

.results-header {
  text-align: center;
  margin-bottom: 32px;
}

.score-badge {
  font-size: 64px;
  font-weight: 800;
  font-family: var(--font-mono);
  color: var(--secondary);
  text-shadow: 0 0 20px var(--secondary-glow);
  margin-bottom: 8px;
}

.results-stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 32px;
}

.results-stat-box {
  text-align: center;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 16px;
}

.results-stat-box h4 {
  font-size: 24px;
  font-weight: 700;
  font-family: var(--font-mono);
  margin-bottom: 4px;
}

.results-stat-box p {
  font-size: 12px;
  color: var(--text-muted);
  text-transform: uppercase;
  font-weight: 600;
  letter-spacing: 0.5px;
}

.results-stat-box.success h4 { color: var(--success); }
.results-stat-box.error h4 { color: var(--error); }

.review-section {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.review-item {
  border-left: 4px solid var(--border-color);
  padding-left: 20px;
  margin-bottom: 12px;
}

.review-item.correct { border-left-color: var(--success); }
.review-item.incorrect { border-left-color: var(--error); }

.review-status-row {
  display: flex;
  justify-content: space-between;
  margin-bottom: 8px;
  font-size: 13px;
  font-weight: 600;
}

.review-status-row .correct-text { color: var(--success); }
.review-status-row .incorrect-text { color: var(--error); }

.solution-box {
  background: hsla(222, 25%, 6%, 0.8);
  border: 1px dashed var(--border-color);
  border-radius: 12px;
  padding: 16px;
  margin-top: 12px;
  font-size: 14px;
}

/* Floating Calculator */
.calc-widget {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 250px;
  background: var(--bg-sidebar);
  border: 1px solid var(--primary);
  border-radius: 16px;
  box-shadow: 0 10px 40px 0 rgba(0, 0, 0, 0.8);
  z-index: 99;
  display: none;
  flex-direction: column;
  overflow: hidden;
  animation: fadeIn 0.2s ease;
}

.calc-header {
  background: var(--primary);
  color: white;
  padding: 10px 16px;
  font-size: 13px;
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: move;
}

.calc-close {
  background: transparent;
  border: none;
  color: white;
  font-size: 18px;
  cursor: pointer;
}

.calc-display {
  background: rgba(0, 0, 0, 0.4);
  padding: 16px;
  text-align: right;
  font-family: var(--font-mono);
  font-size: 20px;
  color: var(--secondary);
  border-bottom: 1px solid var(--border-color);
}

.calc-buttons {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  padding: 12px;
}

.calc-btn {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 10px;
  border-radius: 8px;
  font-family: var(--font-mono);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.calc-btn:hover {
  background: var(--border-color);
}

.calc-btn.op {
  color: var(--primary);
}

.calc-btn.eq {
  background: var(--primary);
  color: white;
  grid-column: span 2;
}

/* DPP Generator Panel styling */
.dpp-generator-card {
  display: flex;
  flex-direction: column;
  gap: 20px;
  max-width: 600px;
  margin: 0 auto 32px auto;
}

.select-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.select-group label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-muted);
}

.dpp-select {
  background: var(--bg-main);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  padding: 12px 16px;
  border-radius: 12px;
  outline: none;
  font-family: var(--font-sans);
  font-size: 14px;
}

.dpp-select:focus {
  border-color: var(--primary);
}

.dpp-sheet {
  display: flex;
  flex-direction: column;
  gap: 24px;
  animation: fadeIn 0.4s ease;
}

.dpp-problem-card {
  border-left: 4px solid var(--primary);
}

.solution-toggle-btn {
  background: transparent;
  border: 1px dashed var(--border-color);
  color: var(--secondary);
  padding: 8px 16px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 13px;
  font-weight: 600;
  margin-top: 12px;
  transition: var(--transition);
}

.solution-toggle-btn:hover {
  border-color: var(--secondary);
  background: hsla(180, 80%, 45%, 0.05);
}

/* Strategy Panel Details */
.strategy-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.strategy-nav {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.strategy-nav-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 16px 20px;
  color: var(--text-main);
  cursor: pointer;
  transition: var(--transition);
}

.strategy-nav-item:hover {
  border-color: var(--secondary);
  background: var(--bg-card-hover);
}

.strategy-nav-item.active {
  border-color: var(--secondary);
  background: linear-gradient(90deg, hsla(180, 80%, 45%, 0.15), transparent);
}

.strategy-nav-item h4 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 4px;
}

.strategy-nav-item p {
  font-size: 12px;
  color: var(--text-muted);
}

.strategy-viewer {
  min-height: 400px;
}

.strategy-text-content {
  font-size: 15px;
  line-height: 1.6;
  color: var(--text-main);
}

.strategy-text-content h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--secondary);
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 6px;
}

.strategy-text-content h4 {
  font-size: 16px;
  font-weight: 600;
  margin-top: 16px;
  margin-bottom: 8px;
  color: var(--text-main);
}

.strategy-text-content p {
  margin-bottom: 12px;
  color: var(--text-muted);
}

.strategy-text-content ul {
  padding-left: 20px;
  margin-bottom: 16px;
  color: var(--text-muted);
}

.strategy-text-content li {
  margin-bottom: 6px;
}

.strategy-text-content blockquote {
  background: rgba(255, 255, 255, 0.02);
  border-left: 4px solid var(--primary);
  padding: 12px 16px;
  border-radius: 8px;
  font-style: italic;
  margin: 16px 0;
}