/* ============================================================
   CYBERPUNK QUEST - Cyberpunk Theme Stylesheet
   Inspired by VoltAgent, Linear, ElevenLabs design systems
   ============================================================ */

:root {
  /* Core Cyberpunk Palette */
  --abyss: #050507;
  --carbon: #101010;
  --carbon-elevated: #18181b;
  --warm-charcoal: #3d3a39;
  --warm-charcoal-light: #4a4644;

  /* Text */
  --snow: #f2f2f2;
  --snow-muted: #e0e0e0;
  --parchment: #b8b3b0;
  --slate: #8b949e;
  --slate-dim: #6b7280;

  /* Accent - Emerald Signal Green (VoltAgent inspired) */
  --signal-green: #00d992;
  --signal-green-dim: #00b87d;
  --signal-green-bg: rgba(0, 217, 146, 0.1);
  --signal-green-glow: rgba(0, 217, 146, 0.4);
  --mint: #2fd6a1;

  /* Secondary Accents */
  --violet: #818cf8;
  --cobalt: #306cce;
  --amber: #ffba00;
  --coral: #fb565b;
  --teal: #4cb3d4;

  /* Difficulty Colors */
  --diff-trivial: #22c55e;
  --diff-easy: #84cc16;
  --diff-medium: #eab308;
  --diff-hard: #f97316;
  --diff-epic: #ef4444;

  /* Rarity Colors */
  --rarity-common: #9ca3af;
  --rarity-uncommon: #22c55e;
  --rarity-rare: #3b82f6;
  --rarity-epic: #a855f7;
  --rarity-legendary: #fbbf24;

  /* Faction Colors */
  --faction-trauma: #ef4444;
  --faction-maxtac: #8b5cf6;
  --faction-netwatch: #06b6d4;
  --faction-maelstrom: #f97316;
  --faction-valentinos: #ec4899;
  --faction-independent: #22d3ee;

  /* UI System */
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --radius-xl: 12px;
  --radius-pill: 9999px;

  --shadow-ambient: rgba(92, 88, 85, 0.2) 0px 0px 15px;
  --shadow-dramatic: rgba(0, 0, 0, 0.7) 0px 20px 60px,
                     rgba(148, 163, 184, 0.1) 0px 0px 0px 1px inset;
  --shadow-green-glow: 0 0 2px var(--signal-green), 0 0 8px var(--signal-green);
  --shadow-green-pulse: 0 0 4px var(--signal-green), 0 0 16px var(--signal-green);
  --shadow-card: rgba(0, 0, 0, 0.4) 0px 0px 1px,
                 rgba(0, 0, 0, 0.3) 0px 4px 8px;
  --shadow-inset: rgba(0, 0, 0, 0.3) 0px 0px 12px 0px inset;

  /* Transitions */
  --transition-fast: 120ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-base: 180ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow: 300ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Typography */
  --font-ui: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
  --font-display: var(--font-ui);

  /* Spacing Scale (8px base) */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-8: 32px;
  --space-10: 40px;
  --space-12: 48px;
  --space-16: 64px;

  /* Layout */
  --container-max: 1400px;
  --sidebar-width: 320px;
  --header-height: 64px;
}

/* Light mode (respects system preference) */
@media (prefers-color-scheme: light) {
  :root {
    --abyss: #f7f8f8;
    --carbon: #ffffff;
    --carbon-elevated: #f3f4f5;
    --warm-charcoal: #d0d6e0;
    --warm-charcoal-light: #e6e6e6;
    --snow: #0f1011;
    --snow-muted: #191a1b;
    --parchment: #34343a;
    --slate: #62666d;
    --slate-dim: #8a8f98;
    --signal-green: #008b00;
    --signal-green-dim: #007000;
    --signal-green-bg: rgba(0, 139, 0, 0.1);
    --mint: #10b981;
    --shadow-ambient: rgba(0, 0, 0, 0.1) 0px 0px 15px;
    --shadow-dramatic: rgba(0, 0, 0, 0.15) 0px 20px 60px;
    --shadow-card: rgba(0, 0, 0, 0.1) 0px 0px 1px,
                   rgba(0, 0, 0, 0.08) 0px 4px 8px;
    --shadow-inset: rgba(0, 0, 0, 0.05) 0px 0px 12px 0px inset;
  }
}

/* ============================================================
   RESET & BASE
   ============================================================ */

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-ui);
  font-size: 16px;
  line-height: 1.5;
  color: var(--snow);
  background: var(--abyss);
  min-height: 100vh;
  overflow-x: hidden;
}

/* Selection */
::selection {
  background: var(--signal-green-bg);
  color: var(--signal-green);
}

/* Focus Visible */
:focus-visible {
  outline: none;
  box-shadow: 0 0 0 2px var(--carbon), 0 0 0 4px var(--signal-green);
  border-radius: var(--radius-sm);
}

/* Scrollbar */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: var(--carbon);
}
::-webkit-scrollbar-thumb {
  background: var(--warm-charcoal);
  border-radius: var(--radius-pill);
}
::-webkit-scrollbar-thumb:hover {
  background: var(--warm-charcoal-light);
}

/* ============================================================
   TYPOGRAPHY
   ============================================================ */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--snow);
}

.display-xl {
  font-size: clamp(2.5rem, 6vw, 4rem);
  font-weight: 400;
  line-height: 1.0;
  letter-spacing: -0.04em;
}

.display-lg {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 400;
  line-height: 1.05;
  letter-spacing: -0.03em;
}

.display-md {
  font-size: clamp(1.5rem, 4vw, 2.25rem);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.heading-1 { font-size: 2rem; font-weight: 400; line-height: 1.15; letter-spacing: -0.02em; }
.heading-2 { font-size: 1.5rem; font-weight: 400; line-height: 1.25; letter-spacing: -0.01em; }
.heading-3 { font-size: 1.25rem; font-weight: 590; line-height: 1.3; letter-spacing: -0.01em; }

.body-lg { font-size: 1.125rem; font-weight: 400; line-height: 1.6; }
.body { font-size: 1rem; font-weight: 400; line-height: 1.5; }
.body-sm { font-size: 0.875rem; font-weight: 400; line-height: 1.5; }
.body-xs { font-size: 0.75rem; font-weight: 400; line-height: 1.4; }

.text-emphasis { font-weight: 590; }
.text-muted { color: var(--slate); }
.text-dim { color: var(--slate-dim); }
.text-green { color: var(--signal-green); }
.text-mint { color: var(--mint); }
.text-amber { color: var(--amber); }
.text-coral { color: var(--coral); }
.text-violet { color: var(--violet); }

.uppercase { text-transform: uppercase; letter-spacing: 0.15em; font-size: 0.75rem; font-weight: 600; }

.mono { font-family: var(--font-mono); }
.code { font-family: var(--font-mono); font-size: 0.875rem; background: var(--carbon); padding: 2px 6px; border-radius: var(--radius-sm); border: 1px solid var(--warm-charcoal); }

/* ============================================================
   LAYOUT
   ============================================================ */

.app {
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr;
  grid-template-rows: var(--header-height) 1fr;
  grid-template-areas:
    "header header"
    "sidebar main";
  min-height: 100vh;
  max-width: 100vw;
}

.header {
  grid-area: header;
  background: rgba(16, 16, 16, 0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--warm-charcoal);
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-6);
  height: var(--header-height);
}

.sidebar {
  grid-area: sidebar;
  background: var(--carbon);
  border-right: 1px solid var(--warm-charcoal);
  padding: var(--space-6) var(--space-4);
  overflow-y: auto;
  position: sticky;
  top: var(--header-height);
  height: calc(100vh - var(--header-height));
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.main {
  grid-area: main;
  padding: var(--space-6) var(--space-8);
  overflow-y: auto;
  max-width: calc(100% - var(--sidebar-width));
}

@media (max-width: 1024px) {
  .app {
    grid-template-columns: 1fr;
    grid-template-areas:
      "header"
      "main";
  }
  .sidebar {
    position: fixed;
    left: -100%;
    top: var(--header-height);
    height: calc(100vh - var(--header-height));
    width: 300px;
    max-width: 85vw;
    z-index: 200;
    transition: left var(--transition-base);
    box-shadow: var(--shadow-dramatic);
  }
  .sidebar.open { left: 0; }
  .main { max-width: 100%; }
  .sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.7);
    z-index: 150;
  }
  .sidebar-overlay.visible { display: block; }
}

/* ============================================================
   HEADER COMPONENTS
   ============================================================ */

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--snow);
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--signal-green) 0%, var(--mint) 100%);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  animation: pulse-glow 3s ease-in-out infinite;
}

@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 4px var(--signal-green), 0 0 8px var(--signal-green); }
  50% { box-shadow: 0 0 8px var(--signal-green), 0 0 20px var(--signal-green); }
}

.logo-text { font-size: 1.125rem; font-weight: 590; letter-spacing: -0.01em; }
.logo-tagline { font-size: 0.625rem; font-weight: 600; color: var(--signal-green); text-transform: uppercase; letter-spacing: 0.1em; }

.header-actions { display: flex; align-items: center; gap: var(--space-3); }

/* ============================================================
   BUTTONS
   ============================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-ui);
  font-size: 0.875rem;
  font-weight: 500;
  line-height: 1;
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
  user-select: none;
}

.btn:disabled { opacity: 0.4; cursor: not-allowed; }

/* Ghost - Default */
.btn-ghost {
  background: transparent;
  color: var(--snow-muted);
  border-color: var(--warm-charcoal);
}
.btn-ghost:hover:not(:disabled) {
  background: rgba(255,255,255,0.03);
  color: var(--snow);
  border-color: var(--warm-charcoal-light);
}

/* Primary - Signal Green */
.btn-primary {
  background: var(--carbon);
  color: var(--mint);
  border-color: var(--signal-green);
  box-shadow: var(--shadow-green-glow);
}
.btn-primary:hover:not(:disabled) {
  background: var(--signal-green-bg);
  box-shadow: var(--shadow-green-pulse);
}

/* Secondary - Violet */
.btn-secondary {
  background: transparent;
  color: var(--violet);
  border-color: var(--violet);
}
.btn-secondary:hover:not(:disabled) {
  background: rgba(129, 140, 248, 0.1);
}

/* Danger - Coral */
.btn-danger {
  background: transparent;
  color: var(--coral);
  border-color: var(--coral);
}
.btn-danger:hover:not(:disabled) {
  background: rgba(251, 86, 91, 0.1);
}

/* Pill variant */
.btn-pill { border-radius: var(--radius-pill); padding: var(--space-2) var(--space-5); }

/* Sizes */
.btn-sm { padding: var(--space-1) var(--space-3); font-size: 0.8125rem; }
.btn-lg { padding: var(--space-3) var(--space-6); font-size: 1rem; }

/* Icon Button */
.btn-icon {
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: var(--radius-md);
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--warm-charcoal);
  color: var(--parchment);
}
.btn-icon:hover:not(:disabled) {
  background: rgba(255,255,255,0.05);
  color: var(--snow);
  border-color: var(--warm-charcoal-light);
}

/* ============================================================
   CARDS & CONTAINERS
   ============================================================ */

.card {
  background: var(--carbon);
  border: 1px solid var(--warm-charcoal);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition-base);
}

.card:hover {
  border-color: var(--warm-charcoal-light);
  box-shadow: var(--shadow-ambient);
}

.card-accent {
  border-color: var(--signal-green);
  box-shadow: var(--shadow-green-glow);
}

.card-padded { padding: var(--space-5); }
.card-padded-lg { padding: var(--space-6); }

.card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-5);
  border-bottom: 1px solid var(--warm-charcoal);
}

.card-body { padding: var(--space-5); }
.card-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-5);
  border-top: 1px solid var(--warm-charcoal);
  background: rgba(255,255,255,0.01);
}

/* Panel - elevated surface */
.panel {
  background: var(--carbon-elevated);
  border: 1px solid var(--warm-charcoal);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
}

/* ============================================================
   PLAYER HUD (Sidebar)
   ============================================================ */

.player-hud { flex-shrink: 0; }

.avatar-frame {
  width: 80px;
  height: 80px;
  border-radius: var(--radius-xl);
  background: linear-gradient(135deg, var(--carbon-elevated) 0%, var(--carbon) 100%);
  border: 2px solid var(--warm-charcoal);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  margin: 0 auto var(--space-4);
  position: relative;
  overflow: hidden;
}

.avatar-frame::before {
  content: '';
  position: absolute;
  inset: -2px;
  background: linear-gradient(135deg, var(--signal-green), var(--violet));
  border-radius: var(--radius-xl);
  z-index: -1;
  opacity: 0;
  transition: opacity var(--transition-base);
}
.avatar-frame:hover::before { opacity: 1; }

.player-name { text-align: center; font-size: 1.125rem; font-weight: 590; margin-bottom: var(--space-1); }
.player-title { text-align: center; font-size: 0.75rem; color: var(--signal-green); text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: var(--space-4); }

/* XP Bar */
.xp-bar-container { margin-bottom: var(--space-4); }
.xp-bar-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: var(--space-2); }
.xp-bar-label { font-size: 0.75rem; font-weight: 600; color: var(--slate); text-transform: uppercase; letter-spacing: 0.05em; }
.xp-bar-value { font-family: var(--font-mono); font-size: 0.875rem; color: var(--signal-green); }

.xp-bar-track {
  height: 8px;
  background: var(--abyss);
  border-radius: var(--radius-pill);
  overflow: hidden;
  border: 1px solid var(--warm-charcoal);
}
.xp-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--signal-green) 0%, var(--mint) 100%);
  border-radius: var(--radius-pill);
  transition: width var(--transition-slow) cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
}
.xp-bar-fill::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
  animation: shimmer 2s infinite;
}
@keyframes shimmer { 0% { transform: translateX(-100%); } 100% { transform: translateX(100%); } }

.level-info { display: flex; justify-content: space-between; align-items: center; margin-top: var(--space-2); }
.level-current { font-family: var(--font-mono); font-size: 1.5rem; font-weight: 600; color: var(--signal-green); }
.level-next { font-size: 0.75rem; color: var(--slate); }

/* Stats Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3);
  margin-top: var(--space-4);
}

.stat-card {
  background: var(--carbon-elevated);
  border: 1px solid var(--warm-charcoal);
  border-radius: var(--radius-md);
  padding: var(--space-3);
  text-align: center;
  transition: all var(--transition-fast);
}
.stat-card:hover { border-color: var(--signal-green); box-shadow: var(--shadow-green-glow); }
.stat-value { font-family: var(--font-mono); font-size: 1.5rem; font-weight: 600; color: var(--snow); line-height: 1; }
.stat-label { font-size: 0.625rem; font-weight: 600; color: var(--slate); text-transform: uppercase; letter-spacing: 0.05em; margin-top: 2px; }
.stat-card.gold .stat-value { color: var(--amber); }
.stat-card.streak .stat-value { color: var(--coral); }
.stat-card.xp .stat-value { color: var(--signal-green); }
.stat-card.rep .stat-value { color: var(--violet); }

/* Cyberware Slots */
.cyberware-slots { margin-top: var(--space-4); }
.slot-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-2);
}
.slot {
  aspect-ratio: 1;
  background: var(--abyss);
  border: 1px solid var(--warm-charcoal);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
}
.slot:hover { border-color: var(--signal-green); box-shadow: var(--shadow-green-glow); }
.slot.filled { border-color: var(--signal-green); background: var(--signal-green-bg); }
.slot.filled:hover { box-shadow: var(--shadow-green-pulse); }
.slot-icon { font-size: 1.25rem; }
.slot-locked { opacity: 0.3; cursor: not-allowed; }
.slot-tooltip {
  position: absolute;
  bottom: 100%;
  left: 50%;
  transform: translateX(-50%);
  background: var(--carbon);
  border: 1px solid var(--warm-charcoal);
  border-radius: var(--radius-sm);
  padding: var(--space-2) var(--space-3);
  font-size: 0.75rem;
  white-space: nowrap;
  z-index: 10;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-fast);
  margin-bottom: var(--space-1);
}
.slot:hover .slot-tooltip { opacity: 1; }

/* Faction Rep */
.faction-rep { margin-top: var(--space-4); }
.faction-list { display: flex; flex-direction: column; gap: var(--space-2); }
.faction-bar {
  display: grid;
  grid-template-columns: 28px 1fr 50px;
  align-items: center;
  gap: var(--space-2);
  font-size: 0.75rem;
}
.faction-icon { text-align: center; }
.faction-name { color: var(--parchment); font-weight: 500; }
.faction-track {
  height: 6px;
  background: var(--abyss);
  border-radius: var(--radius-pill);
  overflow: hidden;
  border: 1px solid var(--warm-charcoal);
}
.faction-fill {
  height: 100%;
  border-radius: var(--radius-pill);
  transition: width var(--transition-slow);
}
.faction-value { font-family: var(--font-mono); text-align: right; color: var(--slate); }

/* ============================================================
   QUEST BOARD (Main Content)
   ============================================================ */

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-6);
  flex-wrap: wrap;
  gap: var(--space-4);
}

.section-title { display: flex; align-items: center; gap: var(--space-3); }
.section-title h2 { font-size: 1.5rem; }
.section-title .icon { font-size: 1.5rem; }

.section-actions { display: flex; gap: var(--space-2); }

.quest-board { display: flex; flex-direction: column; gap: var(--space-4); }

.quest-card {
  background: var(--carbon);
  border: 1px solid var(--warm-charcoal);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: var(--space-5);
  align-items: start;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.quest-card::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 4px;
  background: var(--diff-color, var(--warm-charcoal));
  opacity: 0;
  transition: opacity var(--transition-fast);
}
.quest-card:hover::before { opacity: 1; }
.quest-card:hover {
  border-color: var(--warm-charcoal-light);
  box-shadow: var(--shadow-ambient);
}
.quest-card.completed { opacity: 0.6; background: var(--abyss); }

.quest-difficulty {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--diff-bg, var(--carbon-elevated));
  border: 1px solid var(--diff-color, var(--warm-charcoal));
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.quest-diff-icon { font-size: 1.25rem; line-height: 1; }
.quest-diff-label { font-size: 0.5rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.02em; color: var(--diff-color); margin-top: 2px; }

.quest-content { min-width: 0; }
.quest-header { display: flex; align-items: flex-start; justify-content: space-between; gap: var(--space-3); margin-bottom: var(--space-2); }
.quest-title { font-size: 1.125rem; font-weight: 590; color: var(--snow); }
.quest-rewards { display: flex; gap: var(--space-3); flex-shrink: 0; }
.reward { display: flex; align-items: center; gap: 4px; font-family: var(--font-mono); font-size: 0.875rem; font-weight: 600; }
.reward.xp { color: var(--signal-green); }
.reward.gold { color: var(--amber); }
.reward.rep { color: var(--violet); }

.quest-description { color: var(--parchment); font-size: 0.875rem; line-height: 1.5; margin-bottom: var(--space-3); }
.quest-tags { display: flex; flex-wrap: wrap; gap: var(--space-2); margin-bottom: var(--space-3); }
.tag {
  font-size: 0.625rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 2px 8px;
  border-radius: var(--radius-pill);
  background: var(--carbon-elevated);
  border: 1px solid var(--warm-charcoal);
  color: var(--slate);
}
.tag.faction { border-color: var(--faction-color); color: var(--faction-color); background: rgba(var(--faction-color-rgb), 0.1); }
.tag.cyberware { border-color: var(--signal-green); color: var(--signal-green); background: var(--signal-green-bg); }

.quest-actions { display: flex; flex-direction: column; gap: var(--space-2); align-items: flex-end; flex-shrink: 0; }
.quest-due { font-size: 0.75rem; color: var(--slate); text-align: right; }
.quest-due.overdue { color: var(--coral); font-weight: 590; }
.quest-due.today { color: var(--amber); font-weight: 590; }

/* ============================================================
   MODALS
   ============================================================ */

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(5, 5, 7, 0.9);
  backdrop-filter: blur(8px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-4);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}
.modal-overlay.visible { opacity: 1; visibility: visible; }

.modal {
  background: var(--carbon);
  border: 1px solid var(--warm-charcoal);
  border-radius: var(--radius-xl);
  max-width: 560px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  transform: scale(0.95) translateY(20px);
  transition: transform var(--transition-base);
  box-shadow: var(--shadow-dramatic);
}
.modal-overlay.visible .modal { transform: scale(1) translateY(0); }

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-5) var(--space-6);
  border-bottom: 1px solid var(--warm-charcoal);
}
.modal-title { font-size: 1.25rem; font-weight: 590; }
.modal-close {
  width: 36px; height: 36px;
  border-radius: var(--radius-md);
  background: transparent;
  border: 1px solid var(--warm-charcoal);
  color: var(--parchment);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.25rem;
  transition: all var(--transition-fast);
}
.modal-close:hover { background: var(--carbon-elevated); color: var(--snow); border-color: var(--warm-charcoal-light); }

.modal-body { padding: var(--space-6); }
.modal-footer {
  display: flex;
  justify-content: flex-end;
  gap: var(--space-3);
  padding: var(--space-4) var(--space-6);
  border-top: 1px solid var(--warm-charcoal);
  background: rgba(255,255,255,0.01);
}

/* ============================================================
   FORMS
   ============================================================ */

.form-group { margin-bottom: var(--space-4); }
.form-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--slate);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-2);
}
.form-input, .form-select, .form-textarea {
  width: 100%;
  background: var(--abyss);
  border: 1px solid var(--warm-charcoal);
  border-radius: var(--radius-md);
  color: var(--snow);
  font-family: var(--font-ui);
  font-size: 1rem;
  padding: var(--space-3) var(--space-4);
  transition: all var(--transition-fast);
}
.form-input:focus, .form-select:focus, .form-textarea:focus {
  outline: none;
  border-color: var(--signal-green);
  box-shadow: var(--shadow-green-glow);
}
.form-input::placeholder { color: var(--slate-dim); }
.form-textarea { min-height: 100px; resize: vertical; }
.form-select { cursor: pointer; appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%238b949e' stroke-width='2'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right var(--space-3) center; padding-right: var(--space-10); }

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4); }
@media (max-width: 600px) { .form-row { grid-template-columns: 1fr; } }

/* Difficulty Selector */
.difficulty-options { display: flex; flex-wrap: wrap; gap: var(--space-2); }
.diff-option {
  flex: 1;
  min-width: 80px;
  padding: var(--space-3) var(--space-4);
  background: var(--abyss);
  border: 2px solid var(--warm-charcoal);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-fast);
  text-align: center;
}
.diff-option:hover { border-color: var(--warm-charcoal-light); }
.diff-option.selected {
  border-color: var(--diff-color);
  background: var(--diff-bg);
  box-shadow: 0 0 0 1px var(--diff-color);
}
.diff-option-input { display: none; }
.diff-icon { font-size: 1.25rem; display: block; margin-bottom: 4px; }
.diff-label { font-size: 0.75rem; font-weight: 600; text-transform: uppercase; color: var(--parchment); }
.diff-xp { font-family: var(--font-mono); font-size: 0.75rem; color: var(--signal-green); margin-top: 2px; }

/* Checkbox */
.checkbox-group { display: flex; align-items: center; gap: var(--space-3); }
.checkbox-input { width: 20px; height: 20px; accent-color: var(--signal-green); cursor: pointer; }
.checkbox-label { font-size: 0.875rem; color: var(--parchment); cursor: pointer; }

/* ============================================================
   TOAST NOTIFICATIONS
   ============================================================ */

.toast-container {
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  background: var(--carbon);
  border: 1px solid var(--warm-charcoal);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  display: flex;
  align-items: center;
  gap: var(--space-3);
  min-width: 280px;
  max-width: 400px;
  box-shadow: var(--shadow-dramatic);
  animation: toast-in 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  position: relative;
  overflow: hidden;
}
.toast::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 4px;
  background: var(--toast-color, var(--signal-green));
}
.toast.removing { animation: toast-out 0.2s ease-in forwards; }
@keyframes toast-in { from { opacity: 0; transform: translateX(100%); } to { opacity: 1; transform: translateX(0); } }
@keyframes toast-out { to { opacity: 0; transform: translateX(100%); } }

.toast-icon { font-size: 1.25rem; flex-shrink: 0; }
.toast-content { flex: 1; min-width: 0; }
.toast-title { font-weight: 590; font-size: 0.875rem; color: var(--snow); }
.toast-message { font-size: 0.75rem; color: var(--parchment); margin-top: 2px; }
.toast-xp { color: var(--signal-green); font-family: var(--font-mono); font-weight: 600; }
.toast-gold { color: var(--amber); font-family: var(--font-mono); font-weight: 600; }
.toast-achievement { color: var(--rarity-legendary); }

/* ============================================================
   LEVEL UP MODAL
   ============================================================ */

.levelup-modal .modal { max-width: 480px; text-align: center; }
.levelup-animation { position: relative; height: 200px; display: flex; align-items: center; justify-content: center; margin: var(--space-4) 0; }
.levelup-bg { position: absolute; inset: 0; background: radial-gradient(circle at center, var(--signal-green-bg) 0%, transparent 70%); border-radius: var(--radius-xl); }
.levelup-icon { font-size: 5rem; animation: levelup-pop 0.6s cubic-bezier(0.16, 1, 0.3, 1); position: relative; z-index: 1; }
@keyframes levelup-pop { 0% { transform: scale(0); opacity: 0; } 50% { transform: scale(1.2); } 100% { transform: scale(1); opacity: 1; } }
.levelup-particles { position: absolute; inset: 0; pointer-events: none; }
.particle { position: absolute; width: 8px; height: 8px; background: var(--signal-green); border-radius: 50%; animation: particle-burst 1s ease-out forwards; }
@keyframes particle-burst { 0% { transform: translate(0,0) scale(1); opacity: 1; } 100% { transform: translate(var(--tx), var(--ty)) scale(0); opacity: 0; } }

.levelup-title { font-size: 2rem; margin-bottom: var(--space-2); }
.levelup-new-title { color: var(--signal-green); font-size: 1.25rem; font-weight: 590; margin-bottom: var(--space-1); }
.levelup-flavor { color: var(--slate); margin-bottom: var(--space-6); }
.levelup-rewards { display: flex; justify-content: center; gap: var(--space-6); margin-bottom: var(--space-6); }
.reward-item { display: flex; flex-direction: column; align-items: center; gap: 4px; }
.reward-icon { font-size: 2rem; }
.reward-label { font-size: 0.75rem; color: var(--slate); text-transform: uppercase; letter-spacing: 0.05em; }
.reward-value { font-family: var(--font-mono); font-size: 1.25rem; font-weight: 600; color: var(--signal-green); }

/* ============================================================
   ACHIEVEMENT TOAST
   ============================================================ */

.achievement-toast {
  position: fixed;
  top: calc(var(--header-height) + var(--space-6));
  right: var(--space-6);
  z-index: 2100;
  background: var(--carbon);
  border: 2px solid var(--rarity-color, var(--signal-green));
  border-radius: var(--radius-lg);
  padding: var(--space-4) var(--space-5);
  display: flex;
  align-items: center;
  gap: var(--space-4);
  min-width: 320px;
  max-width: 480px;
  box-shadow: var(--shadow-dramatic), 0 0 30px var(--rarity-glow, var(--signal-green-glow));
  animation: achievement-in 0.5s cubic-bezier(0.16, 1, 0.3, 1);
  transform: translateX(120%);
}
.achievement-toast.visible { transform: translateX(0); }
.achievement-toast.removing { animation: achievement-out 0.3s ease-in forwards; }
@keyframes achievement-in { to { transform: translateX(0); } }
@keyframes achievement-out { to { transform: translateX(120%); opacity: 0; } }
.achievement-icon { font-size: 2.5rem; filter: drop-shadow(0 0 8px var(--rarity-glow, var(--signal-green))); }
.achievement-content { flex: 1; }
.achievement-label { font-size: 0.625rem; font-weight: 600; color: var(--rarity-color, var(--signal-green)); text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: 4px; }
.achievement-name { font-size: 1rem; font-weight: 590; color: var(--snow); margin-bottom: 2px; }
.achievement-desc { font-size: 0.75rem; color: var(--parchment); }

/* ============================================================
   CYBERWARE SHOP
   ============================================================ */

.shop-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: var(--space-4); }
.shop-item {
  background: var(--carbon);
  border: 1px solid var(--warm-charcoal);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  transition: all var(--transition-base);
  position: relative;
}
.shop-item:hover { border-color: var(--warm-charcoal-light); box-shadow: var(--shadow-ambient); }
.shop-item.owned { border-color: var(--signal-green); background: var(--signal-green-bg); }
.shop-item.owned::before {
  content: 'INSTALLED';
  position: absolute;
  top: var(--space-3);
  right: var(--space-3);
  font-size: 0.5rem;
  font-weight: 600;
  color: var(--signal-green);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  background: var(--signal-green-bg);
  padding: 2px 8px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--signal-green);
}
.shop-item-header { display: flex; align-items: flex-start; justify-content: space-between; gap: var(--space-3); margin-bottom: var(--space-3); }
.shop-item-icon { font-size: 2.5rem; flex-shrink: 0; }
.shop-item-rarity { font-size: 0.5rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; padding: 2px 8px; border-radius: var(--radius-pill); border: 1px solid var(--rarity-color); color: var(--rarity-color); background: rgba(var(--rarity-color-rgb), 0.1); white-space: nowrap; }
.shop-item-name { font-size: 1.125rem; font-weight: 590; margin-bottom: 4px; }
.shop-item-slot { font-size: 0.625rem; font-weight: 600; color: var(--signal-green); text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: var(--space-2); }
.shop-item-desc { font-size: 0.8125rem; color: var(--parchment); line-height: 1.5; flex: 1; margin-bottom: var(--space-4); }
.shop-item-bonuses { display: flex; flex-wrap: wrap; gap: var(--space-2); margin-bottom: var(--space-4); }
.bonus-tag { font-size: 0.625rem; font-weight: 600; padding: 2px 8px; background: var(--abyss); border: 1px solid var(--warm-charcoal); border-radius: var(--radius-pill); color: var(--slate); }
.bonus-tag.xp { border-color: var(--signal-green); color: var(--signal-green); background: var(--signal-green-bg); }
.bonus-tag.gold { border-color: var(--amber); color: var(--amber); background: rgba(255,186,0,0.1); }
.bonus-tag.streak { border-color: var(--coral); color: var(--coral); background: rgba(251,86,91,0.1); }
.shop-item-price { display: flex; align-items: center; justify-content: space-between; padding-top: var(--space-3); border-top: 1px solid var(--warm-charcoal); }
.price { display: flex; align-items: baseline; gap: 4px; }
.price-value { font-family: var(--font-mono); font-size: 1.5rem; font-weight: 600; color: var(--amber); }
.price-label { font-size: 0.625rem; color: var(--slate); text-transform: uppercase; letter-spacing: 0.05em; }

/* ============================================================
   SETTINGS PANEL
   ============================================================ */

.settings-section { margin-bottom: var(--space-8); }
.settings-title { font-size: 0.75rem; font-weight: 600; color: var(--slate); text-transform: uppercase; letter-spacing: 0.1em; margin-bottom: var(--space-4); padding-bottom: var(--space-2); border-bottom: 1px solid var(--warm-charcoal); }
.setting-row { display: flex; align-items: center; justify-content: space-between; padding: var(--space-3) 0; border-bottom: 1px solid rgba(61, 58, 57, 0.3); }
.setting-info { display: flex; flex-direction: column; gap: 4px; }
.setting-name { font-weight: 500; color: var(--snow); }
.setting-desc { font-size: 0.75rem; color: var(--slate); }
.setting-control { flex-shrink: 0; }

/* Toggle Switch */
.toggle { position: relative; width: 52px; height: 28px; }
.toggle-input { opacity: 0; width: 0; height: 0; }
.toggle-slider {
  position: absolute;
  inset: 0;
  background: var(--warm-charcoal);
  border-radius: var(--radius-pill);
  transition: all var(--transition-fast);
  cursor: pointer;
}
.toggle-slider::before {
  content: '';
  position: absolute;
  width: 22px; height: 22px;
  left: 3px; top: 3px;
  background: var(--snow);
  border-radius: 50%;
  transition: all var(--transition-fast);
  box-shadow: 0 2px 4px rgba(0,0,0,0.3);
}
.toggle-input:checked + .toggle-slider { background: var(--signal-green); }
.toggle-input:checked + .toggle-slider::before { transform: translateX(24px); }
.toggle-input:focus-visible + .toggle-slider { box-shadow: 0 0 0 2px var(--carbon), 0 0 0 4px var(--signal-green); }

/* ============================================================
   LOADING & EMPTY STATES
   ============================================================ */

.loading { display: flex; align-items: center; justify-content: center; padding: var(--space-16); color: var(--slate); }
.spinner {
  width: 32px; height: 32px;
  border: 3px solid var(--warm-charcoal);
  border-top-color: var(--signal-green);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

.empty-state { text-align: center; padding: var(--space-16) var(--space-6); color: var(--slate); }
.empty-icon { font-size: 4rem; margin-bottom: var(--space-4); opacity: 0.5; }
.empty-title { font-size: 1.25rem; font-weight: 590; color: var(--parchment); margin-bottom: var(--space-2); }
.empty-desc { max-width: 320px; margin: 0 auto var(--space-6); line-height: 1.6; }

/* ============================================================
   RESPONSIVE
   ============================================================ */

@media (max-width: 768px) {
  .header { padding: 0 var(--space-4); }
  .main { padding: var(--space-4); }
  .sidebar { padding: var(--space-4); }
  .quest-card { grid-template-columns: 1fr; }
  .quest-difficulty { width: 100%; flex-direction: row; justify-content: flex-start; gap: var(--space-3); height: auto; padding: var(--space-3); }
  .quest-actions { flex-direction: row; justify-content: space-between; align-items: center; }
  .quest-due { text-align: left; }
  .shop-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(4, 1fr); }
  .slot-grid { grid-template-columns: repeat(5, 1fr); }
}

@media (max-width: 480px) {
  .display-xl { font-size: 2rem; }
  .heading-1 { font-size: 1.5rem; }
  .modal { margin: var(--space-2); max-height: calc(100vh - var(--space-4)); }
  .toast-container { left: var(--space-4); right: var(--space-4); bottom: var(--space-4); }
  .toast { min-width: 0; max-width: 100%; }
  .achievement-toast { left: var(--space-4); right: var(--space-4); top: auto; bottom: calc(var(--header-height) + var(--space-4)); transform: translateY(120%); }
  .achievement-toast.visible { transform: translateY(0); }
  .achievement-toast.removing { animation: achievement-out-mobile 0.3s ease-in forwards; }
  @keyframes achievement-out-mobile { to { transform: translateY(120%); opacity: 0; } }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .slot-grid { grid-template-columns: repeat(3, 1fr); }
}

/* ============================================================
   UTILITIES
   ============================================================ */

.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }

.w-full { width: 100%; }
.text-center { text-align: center; }
.text-right { text-align: right; }

.mt-4 { margin-top: var(--space-4); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-6 { margin-bottom: var(--space-6); }

.hidden { display: none !important; }
.invisible { visibility: hidden; }

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* High Contrast */
@media (prefers-contrast: high) {
  :root {
    --warm-charcoal: #ffffff;
    --signal-green: #00ff88;
    --mint: #00ff88;
  }
}