/**
 * Endlessus Academy - Unified Semantic Stylesheet
 * Canonical Design System for Normal View (Light) and Hacker View (Dark HUD)
 */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500;600;700&display=swap');
@import url('https://fonts.googleapis.com/css2?family=Material+Symbols+Outlined:opsz,wght,FILL,GRAD@20..48,100..700,0..1,-50..200');

/* ==========================================================================
   SEMANTIC THEME TOKENS
   ========================================================================== */

:root,
html.theme-normal,
body.theme-normal {
  /* Tailwind-compatible color tokens */
  --color-canvas-base: #f8fafc;
  --color-surface-subtle: #ffffff;
  --color-surface-raised: #f1f5f9;
  --color-surface-container: #ffffff;
  --color-border-hairline: #e2e8f0;
  --color-border-medium: #cbd5e1;
  --color-primary: #0d9488;
  --color-primary-container: #ccfbf1;
  --color-secondary: #2563eb;
  --color-on-surface: #0f172a;
  --color-on-surface-variant: #475569;
  --color-outline: #64748b;
  --color-warning: #d97706;
  --color-danger-critical: #dc2626;

  /* Academy Semantic Variables */
  --academy-bg: #f8fafc;
  --academy-bg-deep: #f1f5f9;
  --academy-surface: #ffffff;
  --academy-surface-raised: #f1f5f9;
  --academy-surface-subtle: #ffffff;
  --academy-border: #e2e8f0;
  --academy-border-strong: #cbd5e1;
  
  --academy-text: #0f172a;
  --academy-text-secondary: #475569;
  --academy-text-muted: #64748b;
  --academy-text-disabled: #94a3b8;
  
  --academy-primary: #0d9488;
  --academy-primary-hover: #0f766e;
  --academy-primary-light: #ccfbf1;
  --academy-primary-dim: rgba(13, 148, 136, 0.08);
  
  --academy-secondary: #2563eb;
  --academy-secondary-hover: #1d4ed8;
  --academy-secondary-dim: rgba(37, 99, 235, 0.08);
  
  --academy-accent: #6366f1;
  --academy-warning: #d97706;
  --academy-warning-dim: rgba(217, 119, 6, 0.08);
  --academy-success: #16a34a;
  --academy-success-dim: rgba(22, 163, 74, 0.08);
  --academy-danger: #dc2626;
  --academy-danger-dim: rgba(220, 38, 38, 0.08);

  --academy-font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --academy-font-heading: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --academy-font-mono: 'JetBrains Mono', ui-monospace, Menlo, Consolas, monospace;

  --academy-card-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.05), 0 1px 2px -1px rgba(0, 0, 0, 0.05);
  --academy-card-hover-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
}

html.dark,
html.theme-hacker,
body.theme-hacker {
  /* Tailwind-compatible color tokens */
  --color-canvas-base: #090D12;
  --color-surface-subtle: #0E131B;
  --color-surface-raised: #151D28;
  --color-surface-container: #121924;
  --color-border-hairline: #1F2937;
  --color-border-medium: #374151;
  --color-primary: #4EDEA3;
  --color-primary-container: rgba(78, 222, 163, 0.15);
  --color-secondary: #4CD7F6;
  --color-on-surface: #F3F4F6;
  --color-on-surface-variant: #9CA3AF;
  --color-outline: #6B7280;
  --color-warning: #F59E0B;
  --color-danger-critical: #EF4444;

  /* Academy Semantic Variables */
  --academy-bg: #090D12;
  --academy-bg-deep: #05070A;
  --academy-surface: #0E131B;
  --academy-surface-raised: #151D28;
  --academy-surface-subtle: #121924;
  --academy-border: #1F2937;
  --academy-border-strong: #374151;
  
  --academy-text: #F3F4F6;
  --academy-text-secondary: #9CA3AF;
  --academy-text-muted: #6B7280;
  --academy-text-disabled: #4B5563;
  
  --academy-primary: #4EDEA3;
  --academy-primary-hover: #38c78c;
  --academy-primary-light: rgba(78, 222, 163, 0.2);
  --academy-primary-dim: rgba(78, 222, 163, 0.12);
  
  --academy-secondary: #4CD7F6;
  --academy-secondary-hover: #38c2e0;
  --academy-secondary-dim: rgba(76, 215, 246, 0.12);
  
  --academy-accent: #A855F7;
  --academy-warning: #F59E0B;
  --academy-warning-dim: rgba(245, 158, 11, 0.15);
  --academy-success: #4EDEA3;
  --academy-success-dim: rgba(78, 222, 163, 0.15);
  --academy-danger: #EF4444;
  --academy-danger-dim: rgba(239, 68, 68, 0.15);

  --academy-font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --academy-font-heading: 'JetBrains Mono', ui-monospace, Menlo, monospace;
  --academy-font-mono: 'JetBrains Mono', ui-monospace, Menlo, Consolas, monospace;

  --academy-card-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
  --academy-card-hover-shadow: 0 0 20px rgba(78, 222, 163, 0.18);
}

/* ==========================================================================
   GLOBAL ACCESSIBILITY & BASE STYLES
   ========================================================================== */

*:focus-visible {
  outline: 2px solid var(--academy-primary) !important;
  outline-offset: 2px !important;
}

body {
  background-color: var(--color-canvas-base);
  color: var(--color-on-surface);
  font-family: var(--academy-font-sans);
}

/* Normal View Body & Card Overrides: clean educational light mode */
html.theme-normal body,
body.theme-normal {
  background-color: #f8fafc !important;
  color: #0f172a !important;
}

html.theme-normal .telemetry-grid,
body.theme-normal .telemetry-grid,
.telemetry-grid {
  background-image: none !important;
}

html.dark .telemetry-grid,
html.theme-hacker .telemetry-grid,
body.theme-hacker .telemetry-grid {
  background-size: 32px 32px;
  background-image:
    linear-gradient(to right, rgba(31, 41, 55, 0.25) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(31, 41, 55, 0.25) 1px, transparent 1px) !important;
}

/* Terminal Containment: terminal windows remain dark, page surrounding them stays light */
.terminal-surface,
.terminal-window,
#terminal-container,
#lab-terminal,
.command pre {
  background-color: #090D12 !important;
  color: #F3F4F6 !important;
  border-color: #1F2937 !important;
}

/* Normal View (Light mode) Interactive Terminal Input Styles */
html.theme-normal #ws-term-input-container,
body.theme-normal #ws-term-input-container,
.theme-normal #ws-term-input-container {
  background-color: #05070A !important;
  border-top-color: #1F2937 !important;
}

html.theme-normal #ws-term-prompt,
body.theme-normal #ws-term-prompt,
.theme-normal #ws-term-prompt {
  color: #4EDEA3 !important;
}

html.theme-normal #ws-term-input,
body.theme-normal #ws-term-input,
.theme-normal #ws-term-input {
  color: #F3F4F6 !important;
  background-color: #05070A !important;
  caret-color: #4EDEA3 !important;
}

html.theme-normal #ws-term-input::placeholder,
body.theme-normal #ws-term-input::placeholder,
.theme-normal #ws-term-input::placeholder {
  color: #6B7280 !important;
  opacity: 1 !important;
}

html.theme-normal #ws-term-input:focus,
html.theme-normal #ws-term-input:focus-visible,
body.theme-normal #ws-term-input:focus,
body.theme-normal #ws-term-input:focus-visible,
.theme-normal #ws-term-input:focus,
.theme-normal #ws-term-input:focus-visible {
  outline: 1px solid rgba(78, 222, 163, 0.6) !important;
  outline-offset: 2px !important;
  box-shadow: none !important;
  border-radius: 4px;
}

body {
  font-family: var(--academy-font-sans);
  min-height: 100vh;
  margin: 0;
  padding: 0;
}

.material-symbols-outlined {
  font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
  display: inline-block;
  vertical-align: middle;
  line-height: 1;
}

/* ==========================================================================
   CANONICAL ACADEMY HEADER
   ========================================================================== */

#academy-header {
  position: sticky;
  top: 0;
  z-index: 50;
  width: 100%;
  border-bottom: 1px solid var(--color-border-hairline);
  background-color: var(--color-surface-subtle);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

.academy-header-inner {
  max-width: 80rem;
  margin: 0 auto;
  padding: 0 1rem;
  height: 4rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

@media (min-width: 640px) {
  .academy-header-inner {
    padding: 0 1.5rem;
  }
}

.academy-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--color-on-surface);
}

.academy-logo-badge {
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 0.625rem;
  background-color: var(--color-surface-raised);
  border: 1px solid var(--color-border-hairline);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  font-family: var(--academy-font-mono);
  font-weight: 800;
  font-size: 0.9rem;
}

.academy-brand-text {
  display: flex;
  flex-direction: column;
}

.academy-brand-title {
  font-weight: 800;
  font-size: 0.95rem;
  letter-spacing: -0.02em;
  color: var(--color-on-surface);
  line-height: 1.2;
}

.academy-brand-sub {
  font-size: 0.65rem;
  color: var(--color-outline);
  font-family: var(--academy-font-mono);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Nav Menu Items */
.academy-nav {
  display: none;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.8125rem;
  font-weight: 500;
}

@media (min-width: 1024px) {
  .academy-nav {
    display: flex;
  }
}

.academy-nav-group {
  position: relative;
}

.academy-nav-btn,
.academy-nav-link {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.45rem 0.75rem;
  border-radius: 0.5rem;
  color: var(--color-on-surface-variant);
  background: transparent;
  border: 1px solid transparent;
  font-size: 0.8125rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.15s ease;
  font-family: inherit;
}

.academy-nav-btn:hover,
.academy-nav-link:hover {
  color: var(--color-on-surface);
  background-color: var(--color-surface-raised);
}

.academy-nav-btn.active,
.academy-nav-link.active {
  color: var(--color-primary);
  background-color: var(--color-primary-container);
  border-color: rgba(13, 148, 136, 0.2);
  font-weight: 700;
}

html.dark .academy-nav-btn.active,
html.dark .academy-nav-link.active {
  border-color: rgba(78, 222, 163, 0.3);
}

/* Dropdown Menu */
.academy-dropdown {
  position: absolute;
  left: 0;
  top: calc(100% + 0.35rem);
  width: 16rem;
  padding: 0.5rem;
  border-radius: 0.75rem;
  background-color: var(--color-surface-subtle);
  border: 1px solid var(--color-border-hairline);
  box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  opacity: 0;
  visibility: hidden;
  transform: translateY(6px);
  transition: all 0.18s cubic-bezier(0.16, 1, 0.3, 1);
  z-index: 100;
}

html.dark .academy-dropdown {
  box-shadow: 0 10px 30px -5px rgba(0, 0, 0, 0.6);
}

.academy-nav-group:hover .academy-dropdown,
.academy-nav-group:focus-within .academy-dropdown,
.academy-nav-group.open .academy-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.academy-dropdown-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 0.625rem 0.75rem;
  border-radius: 0.5rem;
  text-decoration: none;
  color: var(--color-on-surface-variant);
  transition: all 0.12s ease;
}

.academy-dropdown-item:hover {
  background-color: var(--color-surface-raised);
  color: var(--color-primary);
}

.academy-dropdown-item.active {
  background-color: var(--color-primary-container);
  color: var(--color-primary);
}

.academy-dropdown-item-title {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-on-surface);
  line-height: 1.25;
}

.academy-dropdown-item:hover .academy-dropdown-item-title {
  color: var(--color-primary);
}

.academy-dropdown-item-desc {
  font-size: 0.6875rem;
  color: var(--color-outline);
  margin-top: 0.125rem;
  line-height: 1.3;
}

/* Header Controls */
.academy-header-controls {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.academy-search-trigger {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.75rem;
  border-radius: 0.5rem;
  border: 1px solid var(--color-border-hairline);
  background-color: var(--color-surface-raised);
  color: var(--color-on-surface);
  font-size: 0.75rem;
  font-family: inherit;
  cursor: pointer;
  transition: all 0.15s ease;
}

.academy-search-trigger:hover {
  border-color: var(--color-primary);
}

.academy-search-trigger kbd {
  font-family: var(--academy-font-mono);
  font-size: 0.6875rem;
  color: var(--color-outline);
  background: var(--color-canvas-base);
  border: 1px solid var(--color-border-hairline);
  border-radius: 0.25rem;
  padding: 0.1rem 0.35rem;
}

/* Theme Toggle */
.academy-theme-toggle {
  display: flex;
  align-items: center;
  padding: 0.15rem;
  border-radius: 0.5rem;
  background-color: var(--color-surface-raised);
  border: 1px solid var(--color-border-hairline);
}

.academy-theme-btn {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.3rem 0.6rem;
  border-radius: 0.375rem;
  border: none;
  background: transparent;
  color: var(--color-outline);
  font-size: 0.75rem;
  font-weight: 600;
  font-family: var(--academy-font-mono);
  cursor: pointer;
  transition: all 0.12s ease;
}

.academy-theme-btn:hover {
  color: var(--color-on-surface);
}

.academy-theme-btn.active {
  background-color: var(--color-primary);
  color: #ffffff;
}

html.dark .academy-theme-btn.active {
  color: #090D12;
}

/* Mobile Toggle */
.academy-mobile-menu-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.45rem;
  border-radius: 0.5rem;
  border: 1px solid var(--color-border-hairline);
  background-color: var(--color-surface-raised);
  color: var(--color-on-surface);
  cursor: pointer;
}

@media (min-width: 1024px) {
  .academy-mobile-menu-btn {
    display: none;
  }
}

/* Sub-Header Breadcrumb Bar */
.academy-breadcrumb-bar {
  border-top: 1px solid var(--color-border-hairline);
  background-color: var(--color-surface-raised);
  padding: 0.5rem 1rem;
  font-size: 0.75rem;
}

@media (min-width: 640px) {
  .academy-breadcrumb-bar {
    padding: 0.5rem 1.5rem;
  }
}

.academy-breadcrumb-inner {
  max-width: 80rem;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.academy-breadcrumb-trail {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--academy-font-mono);
  font-size: 0.7rem;
  color: var(--color-on-surface-variant);
  overflow-x: auto;
  white-space: nowrap;
}

.academy-breadcrumb-trail a {
  color: var(--color-on-surface-variant);
  text-decoration: none;
  transition: color 0.12s ease;
}

.academy-breadcrumb-trail a:hover {
  color: var(--color-primary);
}

.academy-breadcrumb-sep {
  color: var(--color-outline);
  opacity: 0.6;
}

.academy-breadcrumb-current {
  color: var(--color-primary);
  font-weight: 700;
}

.academy-breadcrumb-cta {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-primary);
  text-decoration: none;
}

.academy-breadcrumb-cta:hover {
  text-decoration: underline;
}

/* Mobile Drawer */
.academy-mobile-drawer {
  position: fixed;
  inset: 0;
  top: 4rem;
  background-color: var(--color-surface-subtle);
  border-bottom: 1px solid var(--color-border-hairline);
  z-index: 45;
  padding: 1.5rem;
  overflow-y: auto;
  display: none;
  flex-direction: column;
  gap: 1.5rem;
}

.academy-mobile-drawer.open {
  display: flex;
}

.academy-mobile-group-title {
  font-family: var(--academy-font-mono);
  font-size: 0.6875rem;
  font-weight: 700;
  color: var(--color-outline);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.5rem;
}

.academy-mobile-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.625rem 0.75rem;
  border-radius: 0.5rem;
  text-decoration: none;
  color: var(--color-on-surface);
  font-size: 0.875rem;
  font-weight: 500;
  transition: background-color 0.12s ease;
}

.academy-mobile-link:hover,
.academy-mobile-link.active {
  background-color: var(--color-surface-raised);
  color: var(--color-primary);
}

/* ==========================================================================
   ACADEMY GLOBAL SEARCH MODAL
   ========================================================================== */

.academy-search-backdrop {
  position: fixed;
  inset: 0;
  z-index: 100;
  background-color: rgba(9, 13, 18, 0.7);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: none;
  align-items: flex-start;
  justify-content: center;
  padding: 4rem 1rem 2rem 1rem;
}

.academy-search-backdrop.open {
  display: flex;
}

.academy-search-dialog {
  width: 100%;
  max-width: 44rem;
  border-radius: 1rem;
  background-color: var(--color-surface-subtle);
  border: 1px solid var(--color-border-hairline);
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.35);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  max-height: 80vh;
}

.academy-search-input-wrap {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--color-border-hairline);
  background-color: var(--color-surface-subtle);
}

.academy-search-input-wrap input {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--color-on-surface);
  font-size: 1rem;
  font-family: inherit;
  outline: none;
}

.academy-search-input-wrap input::placeholder {
  color: var(--color-outline);
}

.academy-search-close-btn {
  background: transparent;
  border: none;
  color: var(--color-outline);
  cursor: pointer;
  padding: 0.25rem;
  border-radius: 0.375rem;
}

.academy-search-close-btn:hover {
  color: var(--color-on-surface);
  background-color: var(--color-surface-raised);
}

.academy-search-results {
  overflow-y: auto;
  padding: 0.5rem;
  flex: 1;
}

.academy-search-group-header {
  font-family: var(--academy-font-mono);
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--color-outline);
  padding: 0.5rem 0.75rem 0.25rem 0.75rem;
  letter-spacing: 0.05em;
}

.academy-search-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.65rem 0.85rem;
  border-radius: 0.5rem;
  text-decoration: none;
  color: var(--color-on-surface);
  cursor: pointer;
  transition: all 0.12s ease;
}

.academy-search-item:hover,
.academy-search-item.selected {
  background-color: var(--color-surface-raised);
}

.academy-search-item-left {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
  min-width: 0;
}

.academy-search-item-title {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-on-surface);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.academy-search-item:hover .academy-search-item-title {
  color: var(--color-primary);
}

.academy-search-item-desc {
  font-size: 0.75rem;
  color: var(--color-on-surface-variant);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.academy-search-item-right {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
}

.academy-search-badge {
  font-family: var(--academy-font-mono);
  font-size: 0.625rem;
  font-weight: 700;
  text-transform: uppercase;
  padding: 0.2rem 0.45rem;
  border-radius: 0.25rem;
  background-color: var(--color-surface-raised);
  border: 1px solid var(--color-border-hairline);
  color: var(--color-outline);
}

.academy-search-badge.badge-room {
  background-color: rgba(13, 148, 136, 0.12);
  border-color: rgba(13, 148, 136, 0.3);
  color: var(--color-primary);
}

.academy-search-badge.badge-lab {
  background-color: rgba(37, 99, 235, 0.12);
  border-color: rgba(37, 99, 235, 0.3);
  color: var(--color-secondary);
}

.academy-search-badge.badge-tool {
  background-color: rgba(217, 119, 6, 0.12);
  border-color: rgba(217, 119, 6, 0.3);
  color: var(--color-warning);
}

.academy-search-badge.badge-glossary {
  background-color: rgba(99, 102, 241, 0.12);
  border-color: rgba(99, 102, 241, 0.3);
  color: #6366f1;
}

.academy-search-badge.badge-methodology {
  background-color: rgba(220, 38, 38, 0.12);
  border-color: rgba(220, 38, 38, 0.3);
  color: var(--color-danger-critical);
}

.academy-search-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.65rem 1.25rem;
  border-top: 1px solid var(--color-border-hairline);
  background-color: var(--color-surface-raised);
  font-family: var(--academy-font-mono);
  font-size: 0.6875rem;
  color: var(--color-outline);
}