/* 
  ⚡ FDE Flight Simulator
  Design Language: Apple Human Interface Guidelines (HIG) Design Philosophy
  Principles: Clarity, Deference, Depth, Translucency, Precision Typography
*/

:root {
  /* Apple Dark Mode Palette (Default) */
  --bg-canvas: #000000;
  --bg-sidebar: rgba(18, 18, 20, 0.75);
  --bg-surface: rgba(28, 28, 30, 0.65);
  --bg-surface-elevated: rgba(44, 44, 46, 0.7);
  --bg-tertiary: rgba(255, 255, 255, 0.06);
  --bg-card: rgba(28, 28, 30, 0.55);
  --bg-input: rgba(118, 118, 128, 0.24);

  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-focus: rgba(255, 255, 255, 0.2);
  --hairline: rgba(255, 255, 255, 0.12);

  --text-primary: #f5f5f7;
  --text-secondary: #86868b;
  --text-tertiary: #6e6e73;

  /* Apple System Colors */
  --apple-blue: #2997ff;
  --apple-blue-hover: #0077ed;
  --apple-blue-glow: rgba(41, 151, 255, 0.18);
  --apple-green: #30d158;
  --apple-green-bg: rgba(48, 209, 88, 0.12);
  --apple-orange: #ff9f0a;
  --apple-orange-bg: rgba(255, 159, 10, 0.12);
  --apple-red: #ff453a;
  --apple-red-bg: rgba(255, 69, 58, 0.12);
  --apple-purple: #bf5af2;

  --font-system: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Helvetica Neue", sans-serif;
  --font-mono: "SF Mono", Menlo, Monaco, Consolas, monospace;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 22px;
  --radius-pill: 9999px;

  --sidebar-width: 330px;
  --shadow-subtle: 0 4px 20px rgba(0, 0, 0, 0.35);
  --shadow-float: 0 12px 32px rgba(0, 0, 0, 0.45);
}

[data-theme="light"] {
  /* Apple Light Mode Palette */
  --bg-canvas: #fbfbfd;
  --bg-sidebar: rgba(245, 245, 247, 0.82);
  --bg-surface: rgba(255, 255, 255, 0.85);
  --bg-surface-elevated: #ffffff;
  --bg-tertiary: rgba(0, 0, 0, 0.04);
  --bg-card: #ffffff;
  --bg-input: rgba(118, 118, 128, 0.12);

  --border-subtle: rgba(0, 0, 0, 0.07);
  --border-focus: rgba(0, 0, 0, 0.2);
  --hairline: rgba(0, 0, 0, 0.08);

  --text-primary: #1d1d1f;
  --text-secondary: #86868b;
  --text-tertiary: #a1a1a6;

  --apple-blue: #0071e3;
  --apple-blue-hover: #0077ed;
  --apple-blue-glow: rgba(0, 113, 227, 0.12);
  --apple-green: #34c759;
  --apple-green-bg: rgba(52, 199, 89, 0.1);
  --apple-orange: #ff9500;
  --apple-orange-bg: rgba(255, 149, 0, 0.1);
  --apple-red: #ff3b30;
  --apple-red-bg: rgba(255, 59, 48, 0.08);
  --apple-purple: #af52de;

  --shadow-subtle: 0 4px 20px rgba(0, 0, 0, 0.04);
  --shadow-float: 0 12px 32px rgba(0, 0, 0, 0.08);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-system);
  background-color: var(--bg-canvas);
  color: var(--text-primary);
  line-height: 1.55;
  overflow-x: hidden;
  letter-spacing: -0.01em;
  transition: background-color 0.3s cubic-bezier(0.16, 1, 0.3, 1), color 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Custom Thin Apple Scrollbar */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: var(--border-subtle);
  border-radius: var(--radius-pill);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--border-focus);
}

/* App Container */
.app-container {
  display: flex;
  min-height: 100vh;
}

/* macOS / iPadOS Style Translucent Sidebar */
.sidebar {
  width: var(--sidebar-width);
  background-color: var(--bg-sidebar);
  backdrop-filter: blur(30px) saturate(190%);
  -webkit-backdrop-filter: blur(30px) saturate(190%);
  border-right: 0.5px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  z-index: 50;
  transition: transform 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

/* macOS Window Header & Traffic Lights */
.sidebar-header {
  padding: 1.25rem 1.4rem 1rem 1.4rem;
  border-bottom: 0.5px solid var(--hairline);
}

.traffic-lights {
  display: flex;
  gap: 7px;
  margin-bottom: 1.1rem;
}

.traffic-light {
  width: 11px;
  height: 11px;
  border-radius: 50%;
  opacity: 0.85;
}

.traffic-light.red { background: #ff5f56; }
.traffic-light.yellow { background: #ffbd2e; }
.traffic-light.green { background: #27c93f; }

.brand-logo {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.brand-title {
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.brand-badge {
  font-size: 0.65rem;
  padding: 0.18rem 0.55rem;
  border-radius: var(--radius-pill);
  background: var(--bg-tertiary);
  color: var(--text-secondary);
  font-weight: 600;
  border: 0.5px solid var(--border-subtle);
}

/* Apple Progress Capsule */
.progress-widget {
  background: var(--bg-surface);
  padding: 0.75rem 0.9rem;
  border-radius: var(--radius-md);
  border: 0.5px solid var(--border-subtle);
  box-shadow: var(--shadow-subtle);
}

.progress-info {
  display: flex;
  justify-content: space-between;
  font-size: 0.76rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 0.45rem;
}

.progress-bar-bg {
  width: 100%;
  height: 4px;
  background: var(--bg-tertiary);
  border-radius: var(--radius-pill);
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  width: 0%;
  background: linear-gradient(90deg, var(--apple-blue), var(--apple-green));
  border-radius: var(--radius-pill);
  transition: width 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Spotlight Style Search Field */
.search-box {
  padding: 0.75rem 1.4rem;
  border-bottom: 0.5px solid var(--hairline);
}

.search-input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
}

.search-icon {
  position: absolute;
  left: 0.75rem;
  font-size: 0.8rem;
  color: var(--text-secondary);
  pointer-events: none;
}

.search-input {
  width: 100%;
  background: var(--bg-input);
  border: 0.5px solid transparent;
  padding: 0.48rem 0.75rem 0.48rem 2rem;
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 0.82rem;
  font-family: var(--font-system);
  outline: none;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.search-input::placeholder {
  color: var(--text-tertiary);
}

.search-input:focus {
  background: var(--bg-surface-elevated);
  border-color: var(--apple-blue);
  box-shadow: 0 0 0 3px var(--apple-blue-glow);
}

/* Sidebar Navigation Items */
.sidebar-nav {
  flex: 1;
  overflow-y: auto;
  padding: 0.8rem 1rem;
}

.nav-module-title {
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-tertiary);
  padding: 0.9rem 0.6rem 0.35rem 0.6rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.48rem 0.7rem;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.82rem;
  cursor: pointer;
  margin-bottom: 2px;
  transition: all 0.18s cubic-bezier(0.16, 1, 0.3, 1);
  user-select: none;
  text-decoration: none;
}

.nav-item:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.nav-item.active {
  background: var(--apple-blue);
  color: #ffffff;
  font-weight: 600;
  box-shadow: 0 2px 8px var(--apple-blue-glow);
}

.nav-item.active .item-status-icon {
  color: #ffffff;
}

.item-status-icon {
  font-size: 0.75rem;
  color: var(--text-tertiary);
}

.nav-item.completed:not(.active) .item-status-icon {
  color: var(--apple-green);
}

/* Sidebar Footer */
.sidebar-footer {
  padding: 0.85rem 1.4rem;
  border-top: 0.5px solid var(--hairline);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.theme-toggle-btn {
  background: var(--bg-input);
  border: 0.5px solid var(--border-subtle);
  color: var(--text-primary);
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-pill);
  font-size: 0.76rem;
  font-weight: 500;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.35rem;
  transition: all 0.2s;
}

.theme-toggle-btn:hover {
  background: var(--bg-tertiary);
  border-color: var(--border-focus);
}

/* Main Content Wrapper */
.main-wrapper {
  margin-left: var(--sidebar-width);
  flex: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Frosted Glass Top Navigation Bar */
.top-bar {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(0, 0, 0, 0.72);
  backdrop-filter: blur(25px) saturate(180%);
  -webkit-backdrop-filter: blur(25px) saturate(180%);
  border-bottom: 0.5px solid var(--hairline);
  padding: 0.85rem 2.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: background 0.3s;
}

[data-theme="light"] .top-bar {
  background: rgba(251, 251, 253, 0.8);
}

.breadcrumb-trail {
  font-size: 0.82rem;
  color: var(--text-secondary);
}

.breadcrumb-trail strong {
  color: var(--text-primary);
  font-weight: 600;
}

.menu-toggle-btn {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.2rem;
  cursor: pointer;
  padding: 0.2rem;
}

/* Content Container & Typography */
.content-container {
  max-width: 920px;
  width: 100%;
  margin: 0 auto;
  padding: 3rem 2.5rem 6rem 2.5rem;
}

/* Section Header */
.section-header-block {
  margin-bottom: 2.2rem;
  padding-bottom: 1.8rem;
  border-bottom: 0.5px solid var(--hairline);
}

.section-category-tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--apple-blue);
  background: var(--apple-blue-glow);
  padding: 0.22rem 0.65rem;
  border-radius: var(--radius-pill);
  margin-bottom: 0.75rem;
  letter-spacing: -0.01em;
}

.section-title {
  font-size: 2.1rem;
  font-weight: 700;
  letter-spacing: -0.035em;
  margin-bottom: 0.65rem;
  color: var(--text-primary);
  line-height: 1.2;
}

.section-summary {
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 1.55;
  letter-spacing: -0.01em;
}

.action-bar-top {
  margin-top: 1.4rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* Apple Pill Button */
.mark-done-btn {
  background: var(--bg-surface);
  border: 0.5px solid var(--border-subtle);
  color: var(--text-primary);
  padding: 0.45rem 1.1rem;
  border-radius: var(--radius-pill);
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  box-shadow: var(--shadow-subtle);
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.mark-done-btn:hover {
  background: var(--bg-surface-elevated);
  border-color: var(--apple-green);
  transform: translateY(-1px);
}

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

.mark-done-btn.is-completed {
  background: var(--apple-green-bg);
  border-color: var(--apple-green);
  color: var(--apple-green);
}

/* Prose Typography */
.prose h3 {
  font-size: 1.32rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  margin: 2.2rem 0 0.9rem 0;
  color: var(--text-primary);
}

.prose h4 {
  font-size: 1.08rem;
  font-weight: 600;
  letter-spacing: -0.015em;
  margin: 1.6rem 0 0.65rem 0;
  color: var(--text-primary);
}

.prose p {
  margin-bottom: 1.15rem;
  font-size: 0.96rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.prose ul, .prose ol {
  margin: 0.9rem 0 1.3rem 1.5rem;
  color: var(--text-secondary);
}

.prose li {
  margin-bottom: 0.55rem;
  line-height: 1.65;
  font-size: 0.95rem;
}

.prose strong {
  color: var(--text-primary);
  font-weight: 600;
}

/* Apple Callout Cards */
.callout {
  padding: 1.1rem 1.35rem;
  border-radius: var(--radius-md);
  margin: 1.5rem 0;
  font-size: 0.91rem;
  line-height: 1.65;
  border: 0.5px solid transparent;
  box-shadow: var(--shadow-subtle);
}

.callout.tip {
  background: var(--apple-blue-glow);
  border-color: rgba(41, 151, 255, 0.25);
  color: var(--text-primary);
}

.callout.warning {
  background: var(--apple-orange-bg);
  border-color: rgba(255, 159, 10, 0.25);
  color: var(--text-primary);
}

.callout.danger {
  background: var(--apple-red-bg);
  border-color: rgba(255, 69, 58, 0.25);
  color: var(--text-primary);
}

.callout.note {
  background: var(--apple-green-bg);
  border-color: rgba(48, 209, 88, 0.25);
  color: var(--text-primary);
}

.quote-box {
  background: var(--bg-surface);
  border-left: 3px solid var(--apple-blue);
  padding: 1.15rem 1.5rem;
  margin: 1.4rem 0;
  font-size: 0.95rem;
  font-style: italic;
  color: var(--text-primary);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  box-shadow: var(--shadow-subtle);
}

/* macOS Window Code Block */
.code-container {
  margin: 1.6rem 0;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-float);
  border: 0.5px solid var(--border-subtle);
}

.code-header {
  background: #1c1c1e;
  padding: 0.6rem 1rem;
  font-size: 0.74rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 0.5px solid rgba(255, 255, 255, 0.08);
  font-family: var(--font-mono);
  color: #a1a1a6;
}

.copy-btn {
  background: rgba(255, 255, 255, 0.08);
  border: 0.5px solid rgba(255, 255, 255, 0.12);
  color: #f5f5f7;
  padding: 0.22rem 0.6rem;
  border-radius: var(--radius-sm);
  font-size: 0.7rem;
  cursor: pointer;
  transition: all 0.15s;
}

.copy-btn:hover {
  background: rgba(255, 255, 255, 0.18);
}

pre {
  background: #000000 !important;
  padding: 1.25rem;
  overflow-x: auto;
  margin: 0;
}

code {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: #e5e5ea;
  line-height: 1.65;
}

p code, li code {
  background: var(--bg-tertiary);
  padding: 0.15rem 0.4rem;
  border-radius: 6px;
  font-size: 0.83rem;
  color: var(--apple-blue);
  border: 0.5px solid var(--border-subtle);
}

/* Apple Refined Data Table */
.table-container {
  overflow-x: auto;
  margin: 1.6rem 0;
  border: 0.5px solid var(--border-subtle);
  border-radius: var(--radius-md);
  background: var(--bg-surface);
  box-shadow: var(--shadow-subtle);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.86rem;
}

.data-table th {
  background: var(--bg-tertiary);
  padding: 0.75rem 1rem;
  color: var(--text-primary);
  font-weight: 600;
  border-bottom: 0.5px solid var(--hairline);
}

.data-table td {
  padding: 0.85rem 1rem;
  border-bottom: 0.5px solid var(--hairline);
  color: var(--text-secondary);
}

.data-table tr:last-child td {
  border-bottom: none;
}

.highlight-row td {
  background: var(--apple-blue-glow);
  color: var(--text-primary);
  font-weight: 500;
}

/* Dual-Track Translation Card (Apple 3-Column Card) */
.dual-track-card {
  background: var(--bg-surface);
  border: 0.5px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.4rem;
  margin: 1.8rem 0;
  box-shadow: var(--shadow-subtle);
}

.dt-header {
  font-size: 0.88rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text-primary);
  margin-bottom: 1rem;
  padding-bottom: 0.6rem;
  border-bottom: 0.5px solid var(--hairline);
}

.dt-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.9rem;
}

.dt-col {
  background: var(--bg-surface-elevated);
  padding: 1rem;
  border-radius: var(--radius-md);
  border: 0.5px solid var(--border-subtle);
  display: flex;
  flex-direction: column;
}

.dt-badge {
  display: inline-block;
  font-size: 0.68rem;
  font-weight: 700;
  padding: 0.18rem 0.55rem;
  border-radius: var(--radius-pill);
  margin-bottom: 0.65rem;
  align-self: flex-start;
  text-transform: uppercase;
}

.dt-badge.tech {
  background: var(--apple-blue-glow);
  color: var(--apple-blue);
}

.dt-badge.biz {
  background: var(--apple-orange-bg);
  color: var(--apple-orange);
}

.dt-badge.cxo {
  background: var(--apple-green-bg);
  color: var(--apple-green);
}

.dt-col p {
  font-size: 0.82rem;
  margin-bottom: 0;
  line-height: 1.55;
  color: var(--text-secondary);
}

/* Pre-Mortem Grid */
.pre-mortem-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.1rem;
  margin: 1.6rem 0;
}

.pm-card {
  background: var(--bg-surface);
  border: 0.5px solid rgba(255, 69, 58, 0.25);
  border-radius: var(--radius-md);
  padding: 1.2rem;
  box-shadow: var(--shadow-subtle);
  transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.pm-card:hover {
  transform: translateY(-2px);
  border-color: var(--apple-red);
}

.pm-tag {
  font-size: 0.66rem;
  font-weight: 700;
  color: var(--apple-red);
  background: var(--apple-red-bg);
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-pill);
  display: inline-block;
  margin-bottom: 0.5rem;
}

.pm-card h4 {
  font-size: 0.95rem;
  margin: 0.2rem 0 0.55rem 0;
  color: var(--text-primary);
}

.pm-card p {
  font-size: 0.83rem;
  margin-bottom: 0.65rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

.pm-remedy {
  background: var(--bg-surface-elevated);
  border-left: 2.5px solid var(--apple-green);
  padding: 0.55rem 0.8rem;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 0.8rem;
  color: var(--text-primary);
  line-height: 1.5;
}

/* Apple Inspired Calculator Card */
.calculator-card {
  background: var(--bg-surface);
  border: 0.5px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.6rem;
  margin: 1.6rem 0;
  box-shadow: var(--shadow-subtle);
}

.calc-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.2rem;
  margin-bottom: 1.4rem;
}

.calc-field label {
  display: block;
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-bottom: 0.45rem;
  font-weight: 500;
}

.calc-field input {
  width: 100%;
  background: var(--bg-input);
  border: 0.5px solid transparent;
  color: var(--text-primary);
  padding: 0.6rem 0.9rem;
  border-radius: var(--radius-sm);
  font-size: 0.92rem;
  font-family: var(--font-system);
  outline: none;
  transition: all 0.2s;
}

.calc-field input:focus {
  background: var(--bg-surface-elevated);
  border-color: var(--apple-blue);
  box-shadow: 0 0 0 3px var(--apple-blue-glow);
}

.action-btn {
  background: var(--apple-blue);
  color: #ffffff;
  border: none;
  padding: 0.65rem 1.4rem;
  border-radius: var(--radius-pill);
  font-size: 0.88rem;
  font-weight: 600;
  cursor: pointer;
  width: 100%;
  box-shadow: 0 4px 14px var(--apple-blue-glow);
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.action-btn:hover {
  background: var(--apple-blue-hover);
  transform: translateY(-1px);
}

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

/* KPI Cards (Apple Fitness Card Aesthetic) */
.kpi-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin: 1.2rem 0;
}

.kpi-card {
  padding: 1.15rem;
  border-radius: var(--radius-md);
  text-align: center;
  background: var(--bg-surface-elevated);
  border: 0.5px solid var(--border-subtle);
  box-shadow: var(--shadow-subtle);
}

.kpi-card.danger {
  background: var(--apple-red-bg);
  border-color: rgba(255, 69, 58, 0.25);
}

.kpi-card.success {
  background: var(--apple-green-bg);
  border-color: rgba(48, 209, 88, 0.25);
}

.kpi-card .label {
  display: block;
  font-size: 0.74rem;
  color: var(--text-secondary);
  margin-bottom: 0.4rem;
  font-weight: 500;
}

.kpi-card .val {
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: -0.025em;
  color: var(--text-primary);
}

.kpi-card.danger .val { color: var(--apple-red); }
.kpi-card.success .val { color: var(--apple-green); }

.talk-track {
  background: var(--bg-surface-elevated);
  border-radius: var(--radius-md);
  padding: 1.1rem 1.3rem;
  font-size: 0.88rem;
  color: var(--text-secondary);
  border: 0.5px solid var(--border-subtle);
  border-left: 3px solid var(--apple-orange);
  margin-top: 1.2rem;
  line-height: 1.6;
}

/* Dual Checklist Panel */
.dual-checklist {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.4rem;
  margin: 1.6rem 0;
}

.checklist-panel {
  background: var(--bg-surface);
  border: 0.5px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.4rem;
  box-shadow: var(--shadow-subtle);
}

.checklist-panel h4 {
  font-size: 0.96rem;
  margin-bottom: 1rem;
  color: var(--text-primary);
  font-weight: 600;
}

.check-group label {
  display: flex;
  align-items: flex-start;
  gap: 0.7rem;
  font-size: 0.84rem;
  color: var(--text-secondary);
  margin-bottom: 0.8rem;
  cursor: pointer;
  line-height: 1.5;
  transition: color 0.15s;
}

.check-group label:hover {
  color: var(--text-primary);
}

.check-group input[type="checkbox"] {
  margin-top: 0.2rem;
  cursor: pointer;
  accent-color: var(--apple-blue);
  width: 15px;
  height: 15px;
}

/* Quiz Deck */
.quiz-card {
  background: var(--bg-surface);
  border: 0.5px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin-bottom: 1.6rem;
  box-shadow: var(--shadow-subtle);
}

.quiz-q {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 1.1rem;
  color: var(--text-primary);
  line-height: 1.55;
}

.quiz-options {
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
}

.quiz-opt {
  background: var(--bg-surface-elevated);
  border: 0.5px solid var(--border-subtle);
  color: var(--text-secondary);
  padding: 0.8rem 1.1rem;
  border-radius: var(--radius-md);
  font-size: 0.88rem;
  font-family: var(--font-system);
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  text-align: left;
}

.quiz-opt:hover {
  background: var(--bg-tertiary);
  border-color: var(--apple-blue);
  color: var(--text-primary);
  transform: translateY(-1px);
}

.quiz-opt.correct {
  background: var(--apple-green-bg) !important;
  border-color: var(--apple-green) !important;
  color: var(--apple-green) !important;
  font-weight: 600;
}

.quiz-opt.wrong {
  background: var(--apple-red-bg) !important;
  border-color: var(--apple-red) !important;
  color: var(--apple-red) !important;
}

.quiz-exp {
  margin-top: 1.1rem;
  padding: 0.95rem 1.2rem;
  background: var(--apple-blue-glow);
  border-left: 3px solid var(--apple-blue);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 0.85rem;
  color: var(--text-primary);
  line-height: 1.6;
}

/* Dashboard Rank & Radar */
.rank-card {
  background: var(--bg-surface);
  border: 0.5px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.6rem;
  text-align: center;
  box-shadow: var(--shadow-subtle);
}

.rank-badge {
  display: inline-block;
  font-size: 1rem;
  font-weight: 700;
  padding: 0.55rem 1.6rem;
  border-radius: var(--radius-pill);
  letter-spacing: -0.01em;
}

/* Glossary Grid */
.glossary-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 0.9rem;
  margin: 1.5rem 0;
}

.glossary-item {
  background: var(--bg-surface);
  border: 0.5px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.1rem;
  box-shadow: var(--shadow-subtle);
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.glossary-item:hover {
  transform: translateY(-2px);
  border-color: var(--border-focus);
}

.glossary-item strong {
  font-size: 0.92rem;
  color: var(--apple-blue);
  display: block;
  margin-bottom: 0.4rem;
}

.glossary-item p {
  font-size: 0.83rem;
  color: var(--text-secondary);
  margin-bottom: 0;
  line-height: 1.5;
}

.hidden {
  display: none !important;
}

/* Branching Decision Sandbox */
.branching-sandbox {
  background: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  margin: 1.8rem 0;
  box-shadow: var(--shadow-subtle);
}

.branching-sandbox h4 {
  font-size: 1.02rem;
  font-weight: 600;
  margin-bottom: 1.1rem;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.choice-group {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.choice-btn {
  background: var(--bg-surface-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 0.95rem 1.2rem;
  font-size: 0.88rem;
  color: var(--text-secondary);
  font-family: var(--font-system);
  text-align: left;
  line-height: 1.5;
  cursor: pointer;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.choice-btn:hover {
  background: var(--bg-tertiary);
  border-color: var(--apple-blue);
  color: var(--text-primary);
  transform: translateY(-1px);
}

.choice-btn.selected.choice-success {
  background: var(--apple-green-bg) !important;
  border-color: var(--apple-green) !important;
  color: var(--apple-green) !important;
  font-weight: 600;
}

.choice-btn.selected.choice-fail {
  background: var(--apple-red-bg) !important;
  border-color: var(--apple-red) !important;
  color: var(--apple-red) !important;
  font-weight: 600;
}

.outcome-box {
  margin-top: 1.25rem;
  padding: 1.25rem 1.4rem;
  border-radius: var(--radius-md);
  animation: fadeIn 0.25s ease-out;
}

.outcome-box.success {
  background: var(--apple-green-bg);
  border: 1px solid var(--apple-green);
}

.outcome-box.fail {
  background: var(--apple-red-bg);
  border: 1px solid var(--apple-red);
}

.outcome-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 0.75rem;
}

.impact-chips {
  display: flex;
  gap: 0.6rem;
}

.impact-chip {
  font-size: 0.78rem;
  padding: 0.2rem 0.65rem;
  border-radius: var(--radius-pill);
  font-weight: 600;
  background: var(--bg-surface);
  border: 0.5px solid var(--border-subtle);
}

.impact-chip.pos {
  color: var(--apple-green);
  border-color: var(--apple-green);
}

.impact-chip.neg {
  color: var(--apple-red);
  border-color: var(--apple-red);
}

.outcome-desc {
  font-size: 0.9rem;
  color: var(--text-primary);
  line-height: 1.6;
}

.outcome-retry-tip, .outcome-success-tip {
  font-size: 0.8rem;
  margin-top: 0.6rem;
  color: var(--text-secondary);
}

/* Code Hunt Challenge */
.code-hunt-block {
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  margin: 1.6rem 0;
  overflow: hidden;
}

.code-hunt-header {
  background: var(--bg-tertiary);
  padding: 0.8rem 1.2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-primary);
}

/* 4D Competency Radar & Dashboard Upgrades */
.competency-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
  margin: 1rem 0 2rem 0;
}

.competency-card {
  background: var(--bg-surface);
  border: 0.5px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.1rem 1.3rem;
  box-shadow: var(--shadow-subtle);
}

.competency-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.6rem;
}

.competency-title {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-primary);
}

.competency-level {
  font-size: 0.78rem;
  font-weight: 600;
}

.competency-tip {
  font-size: 0.76rem;
  color: var(--text-muted);
  margin-top: 0.6rem;
  line-height: 1.4;
}

/* PBL Summary Grid in Dashboard */
.pbl-summary-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1rem;
  margin: 1rem 0 2rem 0;
}

.pbl-summary-item {
  background: var(--bg-surface);
  border: 0.5px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1rem 1.2rem;
  box-shadow: var(--shadow-subtle);
}

.pbl-summary-item.pass {
  border-left: 3px solid var(--apple-green);
}

.pbl-summary-item.fail {
  border-left: 3px solid var(--apple-red);
}

.pbl-item-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.45rem;
  font-size: 0.88rem;
}

.pbl-summary-item p {
  font-size: 0.8rem;
  color: var(--text-secondary);
  margin: 0;
  line-height: 1.45;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Responsive Overrides */
@media (max-width: 880px) {
  .sidebar {
    transform: translateX(-100%);
  }
  .sidebar.open {
    transform: translateX(0);
  }
  .main-wrapper {
    margin-left: 0;
  }
  .menu-toggle-btn {
    display: block;
  }
  .content-container {
    padding: 2rem 1.5rem 4rem 1.5rem;
  }
  .top-bar {
    padding: 0.85rem 1.5rem;
  }
  .dt-grid, .pre-mortem-grid, .calc-grid, .dual-checklist, .kpi-cards, .competency-grid, .pbl-summary-grid {
    grid-template-columns: 1fr;
  }
}