/* ==========================================================================
   SysMeans — Modern Architecture Academy Design System (90.0)
   Ultra-Luxe Glassmorphism, Deep Obsidian Canvas & Animated Laser Cables
   ========================================================================== */

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

:root {
  /* Ultra-Luxe Obsidian Cyber Palette */
  --bg-app: #07090e;
  --bg-header: rgba(7, 9, 14, 0.85);
  --bg-sidebar: #0b0e17;
  --bg-card: rgba(13, 18, 30, 0.82);
  --bg-card-subtle: #111726;
  --bg-inner-box: #0a0d16;
  --bg-hover: #182238;
  --bg-input: #0a0d16;

  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-medium: rgba(255, 255, 255, 0.16);
  --border-active: #38bdf8;
  --border-glow: rgba(56, 189, 248, 0.4);

  --text-primary: #ffffff;
  --text-secondary: #e2e8f0;
  --text-muted: #94a3b8;

  --accent-cyan: #38bdf8;
  --accent-purple: #c084fc;
  --accent-emerald: #34d399;
  --accent-amber: #fbbf24;
  --accent-rose: #f43f5e;

  --font-display: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', Menlo, monospace;

  --shadow-card: 0 16px 40px -8px rgba(0, 0, 0, 0.7), 0 0 0 1px rgba(255, 255, 255, 0.07);
}

[data-theme="light"] {
  /* Crisp Modern High-End Light Theme */
  --bg-app: #f8fafc;
  --bg-header: rgba(255, 255, 255, 0.9);
  --bg-sidebar: #ffffff;
  --bg-card: #ffffff;
  --bg-card-subtle: #f1f5f9;
  --bg-inner-box: #f8fafc;
  --bg-hover: #e2e8f0;
  --bg-input: #ffffff;

  --border-subtle: #e2e8f0;
  --border-medium: #cbd5e1;
  --border-active: #0284c7;
  --border-glow: rgba(2, 132, 199, 0.3);

  --text-primary: #090d16;
  --text-secondary: #1e293b;
  --text-muted: #64748b;

  --accent-cyan: #0284c7;
  --accent-purple: #7c3aed;
  --accent-emerald: #059669;
  --accent-amber: #d97706;
  --accent-rose: #e11d48;

  --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.06), 0 0 0 1px rgba(0, 0, 0, 0.05);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* Custom Sleek Scrollbars */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}
::-webkit-scrollbar-track {
  background: transparent;
}
::-webkit-scrollbar-thumb {
  background: rgba(148, 163, 184, 0.25);
  border-radius: 999px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--accent-cyan);
}

body {
  font-family: var(--font-body);
  background-color: var(--bg-app);
  background-image: 
    radial-gradient(circle at 15% 10%, rgba(56, 189, 248, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 85% 85%, rgba(168, 85, 247, 0.08) 0%, transparent 40%),
    linear-gradient(to right, rgba(255, 255, 255, 0.015) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.015) 1px, transparent 1px);
  background-size: 100% 100%, 100% 100%, 40px 40px, 40px 40px;
  color: var(--text-primary);
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

[data-theme="light"] body {
  background-image: 
    radial-gradient(circle at 15% 10%, rgba(2, 132, 199, 0.05) 0%, transparent 40%),
    radial-gradient(circle at 85% 85%, rgba(124, 58, 237, 0.04) 0%, transparent 40%),
    linear-gradient(to right, rgba(0, 0, 0, 0.02) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(0, 0, 0, 0.02) 1px, transparent 1px);
  background-size: 100% 100%, 100% 100%, 40px 40px, 40px 40px;
}

/* Typography & Headings */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text-primary) !important;
  line-height: 1.25;
}

.font-display { font-family: var(--font-display); }
.font-mono { font-family: var(--font-mono); }

/* Theme utility classes */
.theme-title { color: var(--text-primary) !important; }
.theme-body { color: var(--text-secondary) !important; line-height: 1.7; }
.theme-muted { color: var(--text-muted) !important; }

.theme-card {
  background: var(--bg-card) !important;
  backdrop-filter: blur(24px) !important;
  -webkit-backdrop-filter: blur(24px) !important;
  border: 1px solid var(--border-subtle) !important;
  color: var(--text-primary) !important;
  box-shadow: var(--shadow-card);
  border-radius: 24px;
}

.theme-inner-box {
  background-color: var(--bg-inner-box) !important;
  border: 1px solid var(--border-subtle) !important;
  color: var(--text-secondary) !important;
  border-radius: 16px;
}

.theme-border { border-color: var(--border-subtle) !important; }

/* Step Tree Specific Theme Adaptive Components */
.tree-step-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 24px;
  padding: 1.5rem;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: var(--shadow-card);
}
.tree-step-card.unlocked {
  border-color: var(--border-medium);
}
.tree-step-card.selected {
  border-color: var(--accent-cyan);
  box-shadow: 0 0 30px rgba(56, 189, 248, 0.25);
  ring: 2px solid var(--accent-cyan);
}
.tree-step-card.locked {
  opacity: 0.45;
  background: var(--bg-card-subtle);
}

.tree-code-box {
  background: #0b0f19;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 16px;
  padding: 1rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: #38bdf8;
  overflow-x: auto;
}
[data-theme="light"] .tree-code-box {
  background: #0f172a;
  color: #38bdf8;
  border-color: #334155;
}

.tree-tradeoff-box {
  background: rgba(168, 85, 247, 0.08);
  border: 1px solid rgba(168, 85, 247, 0.3);
  border-radius: 16px;
  padding: 1rem 1.25rem;
}
[data-theme="light"] .tree-tradeoff-box {
  background: #faf5ff;
  border-color: #e9d5ff;
}

.tree-mode-pill-box {
  background: var(--bg-inner-box);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  padding: 0.25rem;
}

/* Universal Submodule Directory Cards & Theme Adaptation */
.submod-card {
  background: var(--bg-card) !important;
  border: 1px solid var(--border-subtle) !important;
  border-radius: 24px !important;
  padding: 1.5rem !important;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1) !important;
  box-shadow: var(--shadow-card) !important;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.submod-card:hover {
  border-color: var(--accent-cyan) !important;
  box-shadow: 0 12px 35px rgba(0, 0, 0, 0.08) !important;
}

.submod-badge {
  padding: 0.25rem 0.6rem;
  border-radius: 999px;
  font-size: 0.65rem;
  font-weight: 700;
  font-family: var(--font-mono);
  background: rgba(168, 85, 247, 0.12);
  color: #c084fc;
  border: 1px solid rgba(168, 85, 247, 0.3);
}
[data-theme="light"] .submod-badge {
  background: #f3e8ff;
  color: #7e22ce;
  border-color: #d8b4fe;
}

.submod-threat-box {
  background: rgba(244, 63, 94, 0.08);
  border: 1px solid rgba(244, 63, 94, 0.25);
  border-radius: 14px;
  padding: 0.85rem 1rem;
  color: #fda4af;
  font-size: 0.72rem;
  font-family: var(--font-mono);
}
[data-theme="light"] .submod-threat-box {
  background: #fff1f2;
  border-color: #fecdd3;
  color: #9f1239;
}

.submod-verdict-box {
  background: rgba(56, 189, 248, 0.08);
  border: 1px solid rgba(56, 189, 248, 0.25);
  border-radius: 14px;
  padding: 0.85rem 1rem;
  color: #bae6fd;
  font-size: 0.75rem;
  line-height: 1.4;
}
[data-theme="light"] .submod-verdict-box {
  background: #f0f9ff;
  border-color: #bae6fd;
  color: #0369a1;
}

.submod-tag {
  background: var(--bg-inner-box);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  border-radius: 8px;
  padding: 0.2rem 0.5rem;
  font-size: 0.7rem;
  font-family: var(--font-mono);
}

.submod-meta-row {
  background: var(--bg-inner-box);
  border: 1px solid var(--border-subtle);
  border-radius: 14px;
  padding: 0.75rem 1rem;
  font-size: 0.75rem;
  font-family: var(--font-mono);
}
.submod-meta-val-gold {
  color: #fbbf24;
  font-weight: 700;
}
[data-theme="light"] .submod-meta-val-gold {
  color: #b45309;
}
.submod-meta-val-green {
  color: #34d399;
  font-weight: 700;
}
[data-theme="light"] .submod-meta-val-green {
  color: #047857;
}

/* Top Navbar Segment Switcher */
.nav-segment-container {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  background: var(--bg-inner-box);
  border: 1px solid var(--border-subtle);
  border-radius: 16px;
  padding: 0.25rem;
}
.nav-segment-btn {
  padding: 0.4rem 0.9rem;
  border-radius: 12px;
  font-size: 0.75rem;
  font-weight: 700;
  font-family: var(--font-display);
  transition: all 0.2s ease;
  color: var(--text-muted);
  border: 1px solid transparent;
  cursor: pointer;
}
.nav-segment-btn:hover {
  color: var(--text-primary);
}
.nav-segment-btn.active {
  background: var(--bg-card);
  color: var(--accent-cyan);
  border-color: var(--border-medium);
  box-shadow: var(--shadow-card);
}

/* Top App Header */
.app-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: 64px;
  background: var(--bg-header);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.75rem;
}

/* Sidebar Navigation */
.app-layout {
  display: flex;
  min-height: calc(100vh - 64px);
}

.app-sidebar {
  width: 290px;
  flex-shrink: 0;
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border-subtle);
  position: sticky;
  top: 64px;
  height: calc(100vh - 64px);
  overflow-y: auto;
  padding: 1.25rem 0.75rem;
  z-index: 40;
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.sidebar-category-title {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  padding: 0.65rem 0.75rem 0.35rem;
}

.sidebar-nav-item {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  padding: 0.6rem 0.85rem;
  border-radius: 14px;
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-secondary);
  background: transparent;
  border: 1px solid transparent;
  cursor: pointer;
  width: 100%;
  text-align: left;
  transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  margin-bottom: 3px;
}

.sidebar-nav-item:hover {
  color: var(--text-primary);
  background: var(--bg-hover);
  transform: translateX(2px);
}

.sidebar-nav-item.active {
  color: #ffffff;
  font-weight: 700;
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.18) 0%, rgba(99, 102, 241, 0.18) 100%);
  border-color: rgba(56, 189, 248, 0.4);
  box-shadow: 0 4px 15px rgba(56, 189, 248, 0.15);
}
[data-theme="light"] .sidebar-nav-item.active {
  color: #0284c7;
  background: rgba(2, 132, 199, 0.1);
  border-color: rgba(2, 132, 199, 0.3);
}

/* Main Content Area */
.app-content {
  flex: 1;
  min-width: 0;
  padding: 2.5rem 3rem 5rem;
  max-width: 1140px;
  margin: 0 auto;
}

@media (max-width: 1024px) {
  .app-sidebar {
    position: fixed;
    top: 64px;
    bottom: 0;
    left: 0;
    width: 280px;
    transform: translateX(-100%);
    box-shadow: 20px 0 50px rgba(0, 0, 0, 0.8);
    z-index: 100;
  }
  .app-sidebar.open {
    transform: translateX(0);
  }
  .app-content {
    padding: 1.25rem 0.85rem 4rem;
  }
}

/* Laser Cable Animation */
@keyframes laserPulse {
  0% { stroke-dashoffset: 48; }
  100% { stroke-dashoffset: 0; }
}

.laser-active {
  stroke-dasharray: 8, 8;
  animation: laserPulse 1.2s linear infinite;
  filter: drop-shadow(0 0 6px rgba(56, 189, 248, 0.7));
}

/* Buttons */
.btn-brand {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.875rem;
  padding: 0.7rem 1.45rem;
  border-radius: 14px;
  background: linear-gradient(135deg, #0284c7 0%, #6366f1 50%, #a855f7 100%);
  color: #ffffff !important;
  border: 1px solid rgba(255, 255, 255, 0.25);
  box-shadow: 0 4px 20px rgba(14, 165, 233, 0.35);
  cursor: pointer;
  transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  text-decoration: none;
}
.btn-brand:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 8px 25px rgba(14, 165, 233, 0.55);
}
.btn-brand:active {
  transform: translateY(0) scale(0.98);
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.875rem;
  padding: 0.7rem 1.45rem;
  border-radius: 14px;
  background: var(--bg-card-subtle);
  color: var(--text-primary) !important;
  border: 1px solid var(--border-subtle);
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
}
.btn-ghost:hover {
  background: var(--bg-hover);
  border-color: var(--border-medium);
  transform: translateY(-1px);
}

.btn-sm {
  padding: 0.45rem 0.95rem;
  font-size: 0.775rem;
  border-radius: 10px;
}

/* Search Modal */
.search-modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(2, 4, 10, 0.85);
  backdrop-filter: blur(20px);
  z-index: 200;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding-top: 12vh;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
}

.search-modal-backdrop.active {
  opacity: 1;
  pointer-events: auto;
}

.search-modal-box {
  background: var(--bg-card);
  backdrop-filter: blur(24px);
  border: 1px solid var(--border-medium);
  border-radius: 22px;
  width: 90%;
  max-width: 640px;
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.85);
  overflow: hidden;
}