/*
 * Hyper Light Drifter - Base Stylesheet
 * Dark, neon-accented, pixel-art inspired design
 * Version: 1.0.0
 */

/* ============================================
   CSS VARIABLES
   ============================================ */
:root {
  /* Color Palette - Dark & Neon */
  --color-background: #0a0e1a;
  --color-background-secondary: #12172b;
  --color-background-tertiary: #1a1f3a;
  --color-surface: #1e2540;
  --color-surface-elevated: #252b4a;
  
  --color-text: #e8eef7;
  --color-text-secondary: #a8b5d1;
  --color-text-tertiary: #6e7a99;
  --color-text-inverse: #0a0e1a;
  
  --color-primary: #ff006e;
  --color-primary-hover: #ff3d8f;
  --color-primary-active: #d60060;
  --color-primary-glow: rgba(255, 0, 110, 0.4);
  
  --color-secondary: #00f5ff;
  --color-secondary-hover: #33f7ff;
  --color-secondary-active: #00d4e0;
  --color-secondary-glow: rgba(0, 245, 255, 0.4);
  
  --color-accent: #9d4edd;
  --color-accent-hover: #b666f0;
  --color-accent-glow: rgba(157, 78, 221, 0.4);
  
  --color-success: #00ff88;
  --color-success-glow: rgba(0, 255, 136, 0.3);
  --color-warning: #ffbd00;
  --color-warning-glow: rgba(255, 189, 0, 0.3);
  --color-danger: #ff3366;
  --color-danger-glow: rgba(255, 51, 102, 0.3);
  
  /* Neutral Grays */
  --color-gray-50: #f8f9fb;
  --color-gray-100: #e8eef7;
  --color-gray-200: #d1dae8;
  --color-gray-300: #a8b5d1;
  --color-gray-400: #8491b3;
  --color-gray-500: #6e7a99;
  --color-gray-600: #4a5470;
  --color-gray-700: #2e3447;
  --color-gray-800: #1a1f3a;
  --color-gray-900: #12172b;
  
  /* Typography */
  --font-primary: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
  --font-mono: 'Courier New', 'Monaco', 'Menlo', 'Consolas', monospace;
  --font-display: 'Impact', 'Haettenschweiler', 'Arial Narrow Bold', sans-serif;
  
  --font-size-xs: 0.75rem;      /* 12px */
  --font-size-sm: 0.875rem;     /* 14px */
  --font-size-base: 1rem;       /* 16px */
  --font-size-lg: 1.125rem;     /* 18px */
  --font-size-xl: 1.25rem;      /* 20px */
  --font-size-2xl: 1.5rem;      /* 24px */
  --font-size-3xl: 1.875rem;    /* 30px */
  --font-size-4xl: 2.25rem;     /* 36px */
  --font-size-5xl: 3rem;        /* 48px */
  --font-size-6xl: 3.75rem;     /* 60px */
  
  --line-height-tight: 1.2;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.75;
  --line-height-loose: 2;
  
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --font-weight-black: 900;
  
  /* Spacing Scale */
  --spacing-0: 0;
  --spacing-1: 0.25rem;   /* 4px */
  --spacing-2: 0.5rem;    /* 8px */
  --spacing-3: 0.75rem;   /* 12px */
  --spacing-4: 1rem;      /* 16px */
  --spacing-5: 1.25rem;   /* 20px */
  --spacing-6: 1.5rem;    /* 24px */
  --spacing-8: 2rem;      /* 32px */
  --spacing-10: 2.5rem;   /* 40px */
  --spacing-12: 3rem;     /* 48px */
  --spacing-16: 4rem;     /* 64px */
  --spacing-20: 5rem;     /* 80px */
  --spacing-24: 6rem;     /* 96px */
  
  /* Border Radius */
  --radius-none: 0;
  --radius-sm: 0.125rem;  /* 2px - pixel-art style */
  --radius-base: 0.25rem; /* 4px */
  --radius-md: 0.375rem;  /* 6px */
  --radius-lg: 0.5rem;    /* 8px */
  --radius-xl: 0.75rem;   /* 12px */
  --radius-2xl: 1rem;     /* 16px */
  --radius-full: 9999px;
  
  /* Shadows - Neon glow effects */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.5);
  --shadow-base: 0 2px 4px 0 rgba(0, 0, 0, 0.6);
  --shadow-md: 0 4px 8px 0 rgba(0, 0, 0, 0.7);
  --shadow-lg: 0 8px 16px 0 rgba(0, 0, 0, 0.8);
  --shadow-xl: 0 12px 24px 0 rgba(0, 0, 0, 0.9);
  
  --shadow-glow-primary: 0 0 20px var(--color-primary-glow), 0 0 40px var(--color-primary-glow);
  --shadow-glow-secondary: 0 0 20px var(--color-secondary-glow), 0 0 40px var(--color-secondary-glow);
  --shadow-glow-accent: 0 0 20px var(--color-accent-glow), 0 0 40px var(--color-accent-glow);
  --shadow-glow-success: 0 0 15px var(--color-success-glow);
  --shadow-glow-warning: 0 0 15px var(--color-warning-glow);
  --shadow-glow-danger: 0 0 15px var(--color-danger-glow);
  
  /* Transitions */
  --transition-fast: 150ms ease-in-out;
  --transition-base: 250ms ease-in-out;
  --transition-slow: 350ms ease-in-out;
  --transition-slower: 500ms ease-in-out;
  
  /* Z-index scale */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
  
  /* Layout */
  --max-width-xs: 20rem;    /* 320px */
  --max-width-sm: 24rem;    /* 384px */
  --max-width-md: 28rem;    /* 448px */
  --max-width-lg: 32rem;    /* 512px */
  --max-width-xl: 36rem;    /* 576px */
  --max-width-2xl: 42rem;   /* 672px */
  --max-width-3xl: 48rem;   /* 768px */
  --max-width-4xl: 56rem;   /* 896px */
  --max-width-5xl: 64rem;   /* 1024px */
  --max-width-6xl: 72rem;   /* 1152px */
  --max-width-7xl: 80rem;   /* 1280px */
  --max-width-full: 100%;
}

/* ============================================
   RESET / NORMALIZE
   ============================================ */

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

/* Document */
html {
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Remove default margins */
body,
h1,
h2,
h3,
h4,
h5,
h6,
p,
ul,
ol,
li,
figure,
figcaption,
blockquote,
dl,
dd {
  margin: 0;
}

/* Remove list styles */
ul,
ol {
  list-style: none;
  padding: 0;
}

/* Responsive images and media */
img,
picture,
video,
canvas,
svg {
  display: block;
  max-width: 100%;
  height: auto;
}

/* Image rendering for pixel-art */
img,
canvas {
  image-rendering: -webkit-optimize-contrast;
  image-rendering: crisp-edges;
  image-rendering: pixelated;
}

/* Form elements inherit font */
input,
button,
textarea,
select {
  font: inherit;
  color: inherit;
}

/* Remove button styles */
button {
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
}

/* Remove text decoration from links */
a {
  text-decoration: none;
  color: inherit;
}

/* Improve table defaults */
table {
  border-collapse: collapse;
  border-spacing: 0;
}

/* ============================================
   BASE STYLES
   ============================================ */

body {
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-normal);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background-color: var(--color-background);
  background-image: 
    radial-gradient(circle at 20% 50%, rgba(255, 0, 110, 0.03) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(0, 245, 255, 0.03) 0%, transparent 50%),
    radial-gradient(circle at 40% 20%, rgba(157, 78, 221, 0.02) 0%, transparent 50%);
  background-attachment: fixed;
  min-height: 100vh;
  overflow-x: hidden;
}

/* Headings */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  color: var(--color-text);
  margin-bottom: var(--spacing-4);
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

h1 {
  font-size: var(--font-size-5xl);
  font-weight: var(--font-weight-black);
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-shadow: 0 0 30px var(--color-primary-glow);
  margin-bottom: var(--spacing-6);
}

h2 {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-black);
  color: var(--color-secondary);
  text-shadow: 0 0 20px var(--color-secondary-glow);
}

h3 {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-accent);
}

h4 {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
}

h5 {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
}

h6 {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
}

@media (max-width: 768px) {
  h1 { font-size: var(--font-size-4xl); }
  h2 { font-size: var(--font-size-3xl); }
  h3 { font-size: var(--font-size-2xl); }
  h4 { font-size: var(--font-size-xl); }
  h5 { font-size: var(--font-size-lg); }
  h6 { font-size: var(--font-size-base); }
}

/* Paragraphs */
p {
  margin-bottom: var(--spacing-4);
  max-width: 70ch;
  color: var(--color-text-secondary);
}

p:last-child {
  margin-bottom: 0;
}

/* Links */
a {
  color: var(--color-secondary);
  transition: color var(--transition-fast), text-shadow var(--transition-fast);
  position: relative;
}

a:hover {
  color: var(--color-secondary-hover);
  text-shadow: 0 0 8px var(--color-secondary-glow);
}

a:focus-visible {
  outline: 2px solid var(--color-secondary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* Strong and emphasis */
strong,
b {
  font-weight: var(--font-weight-bold);
  color: var(--color-text);
}

em,
i {
  font-style: italic;
}

/* Code */
code,
pre {
  font-family: var(--font-mono);
  font-size: var(--font-size-sm);
}

code {
  background-color: var(--color-surface);
  color: var(--color-secondary);
  padding: var(--spacing-1) var(--spacing-2);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-gray-700);
}

pre {
  background-color: var(--color-surface);
  color: var(--color-text-secondary);
  padding: var(--spacing-4);
  border-radius: var(--radius-base);
  border: 1px solid var(--color-gray-700);
  overflow-x: auto;
  line-height: var(--line-height-relaxed);
}

pre code {
  background: none;
  padding: 0;
  border: none;
}

/* Horizontal rule */
hr {
  border: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-primary), transparent);
  margin: var(--spacing-8) 0;
  box-shadow: var(--shadow-glow-primary);
}

/* Blockquote */
blockquote {
  border-left: 4px solid var(--color-primary);
  padding-left: var(--spacing-4);
  margin: var(--spacing-6) 0;
  color: var(--color-text-secondary);
  font-style: italic;
  background-color: var(--color-surface);
  padding: var(--spacing-4);
  border-radius: 0 var(--radius-base) var(--radius-base) 0;
}

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

/* Container */
.container {
  width: 100%;
  max-width: var(--max-width-7xl);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--spacing-4);
  padding-right: var(--spacing-4);
}

@media (min-width: 640px) {
  .container {
    padding-left: var(--spacing-6);
    padding-right: var(--spacing-6);
  }
}

@media (min-width: 1024px) {
  .container {
    padding-left: var(--spacing-8);
    padding-right: var(--spacing-8);
  }
}

.container-sm { max-width: var(--max-width-3xl); }
.container-md { max-width: var(--max-width-5xl); }
.container-lg { max-width: var(--max-width-6xl); }
.container-xl { max-width: var(--max-width-7xl); }

/* Flexbox utilities */
.flex {
  display: flex;
}

.inline-flex {
  display: inline-flex;
}

.flex-row { flex-direction: row; }
.flex-col { flex-direction: column; }
.flex-row-reverse { flex-direction: row-reverse; }
.flex-col-reverse { flex-direction: column-reverse; }

.flex-wrap { flex-wrap: wrap; }
.flex-nowrap { flex-wrap: nowrap; }

.items-start { align-items: flex-start; }
.items-center { align-items: center; }
.items-end { align-items: flex-end; }
.items-stretch { align-items: stretch; }

.justify-start { justify-content: flex-start; }
.justify-center { justify-content: center; }
.justify-end { justify-content: flex-end; }
.justify-between { justify-content: space-between; }
.justify-around { justify-content: space-around; }
.justify-evenly { justify-content: space-evenly; }

.flex-1 { flex: 1 1 0%; }
.flex-auto { flex: 1 1 auto; }
.flex-none { flex: none; }

.gap-1 { gap: var(--spacing-1); }
.gap-2 { gap: var(--spacing-2); }
.gap-3 { gap: var(--spacing-3); }
.gap-4 { gap: var(--spacing-4); }
.gap-5 { gap: var(--spacing-5); }
.gap-6 { gap: var(--spacing-6); }
.gap-8 { gap: var(--spacing-8); }

/* Grid utilities */
.grid {
  display: grid;
}

.grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
.grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid-cols-6 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
.grid-cols-12 { grid-template-columns: repeat(12, minmax(0, 1fr)); }

@media (min-width: 640px) {
  .sm\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .sm\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (min-width: 768px) {
  .md\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .md\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .md\:grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

@media (min-width: 1024px) {
  .lg\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .lg\:grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .lg\:grid-cols-6 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
}

/* Spacing utilities */
.m-0 { margin: var(--spacing-0); }
.m-1 { margin: var(--spacing-1); }
.m-2 { margin: var(--spacing-2); }
.m-3 { margin: var(--spacing-3); }
.m-4 { margin: var(--spacing-4); }
.m-6 { margin: var(--spacing-6); }
.m-8 { margin: var(--spacing-8); }

.mt-0 { margin-top: var(--spacing-0); }
.mt-2 { margin-top: var(--spacing-2); }
.mt-4 { margin-top: var(--spacing-4); }
.mt-6 { margin-top: var(--spacing-6); }
.mt-8 { margin-top: var(--spacing-8); }
.mt-12 { margin-top: var(--spacing-12); }

.mb-0 { margin-bottom: var(--spacing-0); }
.mb-2 { margin-bottom: var(--spacing-2); }
.mb-4 { margin-bottom: var(--spacing-4); }
.mb-6 { margin-bottom: var(--spacing-6); }
.mb-8 { margin-bottom: var(--spacing-8); }
.mb-12 { margin-bottom: var(--spacing-12); }

.p-0 { padding: var(--spacing-0); }
.p-2 { padding: var(--spacing-2); }
.p-4 { padding: var(--spacing-4); }
.p-6 { padding: var(--spacing-6); }
.p-8 { padding: var(--spacing-8); }

/* Text utilities */
.text-left { text-align: left; }
.text-center { text-align: center; }
.text-right { text-align: right; }

.text-xs { font-size: var(--font-size-xs); }
.text-sm { font-size: var(--font-size-sm); }
.text-base { font-size: var(--font-size-base); }
.text-lg { font-size: var(--font-size-lg); }
.text-xl { font-size: var(--font-size-xl); }
.text-2xl { font-size: var(--font-size-2xl); }

.font-normal { font-weight: var(--font-weight-normal); }
.font-medium { font-weight: var(--font-weight-medium); }
.font-semibold { font-weight: var(--font-weight-semibold); }
.font-bold { font-weight: var(--font-weight-bold); }
.font-black { font-weight: var(--font-weight-black); }

.uppercase { text-transform: uppercase; }
.lowercase { text-transform: lowercase; }
.capitalize { text-transform: capitalize; }

.text-primary { color: var(--color-primary); }
.text-secondary { color: var(--color-secondary); }
.text-accent { color: var(--color-accent); }
.text-success { color: var(--color-success); }
.text-warning { color: var(--color-warning); }
.text-danger { color: var(--color-danger); }

/* Width utilities */
.w-full { width: 100%; }
.w-auto { width: auto; }
.h-full { height: 100%; }
.h-auto { height: auto; }

/* Display utilities */
.block { display: block; }
.inline-block { display: inline-block; }
.inline { display: inline; }
.hidden { display: none; }

/* Position utilities */
.relative { position: relative; }
.absolute { position: absolute; }
.fixed { position: fixed; }
.sticky { position: sticky; }

/* Overflow utilities */
.overflow-hidden { overflow: hidden; }
.overflow-auto { overflow: auto; }
.overflow-scroll { overflow: scroll; }

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

/* ============================================
   COMPONENT STYLES
   ============================================ */

/* Button */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-3) var(--spacing-6);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  line-height: 1;
  text-align: center;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border: 2px solid transparent;
  border-radius: var(--radius-base);
  cursor: pointer;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
  user-select: none;
}

.btn::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  transform: translate(-50%, -50%);
  transition: width var(--transition-slow), height var(--transition-slow);
}

.btn:hover::before {
  width: 300px;
  height: 300px;
}

.btn:focus-visible {
  outline: 2px solid currentColor;
  outline-offset: 2px;
}

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

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

/* Button variants */
.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-hover));
  color: var(--color-text);
  border-color: var(--color-primary);
  box-shadow: var(--shadow-glow-primary), var(--shadow-base);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--color-primary-hover), var(--color-primary));
  box-shadow: var(--shadow-glow-primary), var(--shadow-md);
  transform: translateY(-2px);
}

.btn-primary:active {
  background: var(--color-primary-active);
  transform: scale(0.98) translateY(0);
}

.btn-secondary {
  background: linear-gradient(135deg, var(--color-secondary), var(--color-secondary-hover));
  color: var(--color-text-inverse);
  border-color: var(--color-secondary);
  box-shadow: var(--shadow-glow-secondary), var(--shadow-base);
}

.btn-secondary:hover {
  background: linear-gradient(135deg, var(--color-secondary-hover), var(--color-secondary));
  box-shadow: var(--shadow-glow-secondary), var(--shadow-md);
  transform: translateY(-2px);
}

.btn-accent {
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-hover));
  color: var(--color-text);
  border-color: var(--color-accent);
  box-shadow: var(--shadow-glow-accent), var(--shadow-base);
}

.btn-accent:hover {
  background: linear-gradient(135deg, var(--color-accent-hover), var(--color-accent));
  box-shadow: var(--shadow-glow-accent), var(--shadow-md);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: var(--color-secondary);
  border-color: var(--color-secondary);
}

.btn-outline:hover {
  background: var(--color-secondary);
  color: var(--color-text-inverse);
  box-shadow: var(--shadow-glow-secondary);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text);
  border-color: transparent;
}

.btn-ghost:hover {
  background: var(--color-surface);
}

/* Button sizes */
.btn-sm {
  padding: var(--spacing-2) var(--spacing-4);
  font-size: var(--font-size-sm);
}

.btn-lg {
  padding: var(--spacing-4) var(--spacing-8);
  font-size: var(--font-size-lg);
}

.btn-block {
  width: 100%;
  display: flex;
}

/* Input / Form fields */
.input,
.textarea,
.select {
  width: 100%;
  padding: var(--spacing-3) var(--spacing-4);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background-color: var(--color-surface);
  border: 2px solid var(--color-gray-700);
  border-radius: var(--radius-base);
  transition: border-color var(--transition-base), box-shadow var(--transition-base), background-color var(--transition-base);
  outline: none;
}

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

.input:hover,
.textarea:hover,
.select:hover {
  border-color: var(--color-secondary);
  background-color: var(--color-surface-elevated);
}

.input:focus,
.textarea:focus,
.select:focus {
  border-color: var(--color-secondary);
  box-shadow: 0 0 0 3px var(--color-secondary-glow), var(--shadow-glow-secondary);
  background-color: var(--color-surface-elevated);
}

.input:disabled,
.textarea:disabled,
.select:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  background-color: var(--color-gray-800);
}

.textarea {
  min-height: 120px;
  resize: vertical;
}

/* Input with icon */
.input-group {
  position: relative;
  display: flex;
  align-items: center;
}

.input-icon {
  position: absolute;
  left: var(--spacing-4);
  color: var(--color-text-tertiary);
  pointer-events: none;
}

.input-group .input {
  padding-left: var(--spacing-10);
}

/* Label */
.label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  margin-bottom: var(--spacing-2);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Form group */
.form-group {
  margin-bottom: var(--spacing-6);
}

/* Checkbox / Radio */
.checkbox,
.radio {
  display: inline-flex;
  align-items: center;
  cursor: pointer;
  user-select: none;
}

.checkbox input,
.radio input {
  width: 20px;
  height: 20px;
  margin-right: var(--spacing-2);
  cursor: pointer;
  accent-color: var(--color-secondary);
}

/* Card */
.card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-gray-700);
  border-radius: var(--radius-lg);
  padding: var(--spacing-6);
  box-shadow: var(--shadow-base);
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-base);
  position: relative;
  overflow: hidden;
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary), var(--color-accent));
  opacity: 0;
  transition: opacity var(--transition-base);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg), 0 0 30px rgba(0, 245, 255, 0.1);
  border-color: var(--color-secondary);
}

.card:hover::before {
  opacity: 1;
}

.card-header {
  margin-bottom: var(--spacing-4);
  padding-bottom: var(--spacing-4);
  border-bottom: 1px solid var(--color-gray-700);
}

.card-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text);
  margin-bottom: var(--spacing-2);
}

.card-body {
  color: var(--color-text-secondary);
}

.card-footer {
  margin-top: var(--spacing-4);
  padding-top: var(--spacing-4);
  border-top: 1px solid var(--color-gray-700);
}

/* Card variants */
.card-primary {
  border-color: var(--color-primary);
}

.card-primary::before {
  background: var(--color-primary);
  opacity: 1;
}

.card-secondary {
  border-color: var(--color-secondary);
}

.card-secondary::before {
  background: var(--color-secondary);
  opacity: 1;
}

.card-glow {
  box-shadow: var(--shadow-lg), var(--shadow-glow-secondary);
}

/* Badge */
.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--spacing-1) var(--spacing-3);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-bold);
  line-height: 1;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: var(--radius-full);
  background-color: var(--color-gray-700);
  color: var(--color-text);
}

.badge-primary {
  background-color: var(--color-primary);
  color: var(--color-text);
  box-shadow: var(--shadow-glow-primary);
}

.badge-secondary {
  background-color: var(--color-secondary);
  color: var(--color-text-inverse);
  box-shadow: var(--shadow-glow-secondary);
}

.badge-success {
  background-color: var(--color-success);
  color: var(--color-text-inverse);
  box-shadow: var(--shadow-glow-success);
}

.badge-warning {
  background-color: var(--color-warning);
  color: var(--color-text-inverse);
  box-shadow: var(--shadow-glow-warning);
}

.badge-danger {
  background-color: var(--color-danger);
  color: var(--color-text);
  box-shadow: var(--shadow-glow-danger);
}

/* Alert */
.alert {
  padding: var(--spacing-4) var(--spacing-5);
  border-radius: var(--radius-base);
  border-left: 4px solid;
  background-color: var(--color-surface);
  color: var(--color-text);
  margin-bottom: var(--spacing-4);
}

.alert-primary {
  border-color: var(--color-primary);
  background-color: rgba(255, 0, 110, 0.1);
}

.alert-secondary {
  border-color: var(--color-secondary);
  background-color: rgba(0, 245, 255, 0.1);
}

.alert-success {
  border-color: var(--color-success);
  background-color: rgba(0, 255, 136, 0.1);
}

.alert-warning {
  border-color: var(--color-warning);
  background-color: rgba(255, 189, 0, 0.1);
}

.alert-danger {
  border-color: var(--color-danger);
  background-color: rgba(255, 51, 102, 0.1);
}

/* Divider */
.divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-gray-700), transparent);
  margin: var(--spacing-6) 0;
}

.divider-glow {
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-secondary), transparent);
  box-shadow: var(--shadow-glow-secondary);
}

/* Section */
.section {
  padding: var(--spacing-16) 0;
}

.section-sm {
  padding: var(--spacing-8) 0;
}

.section-lg {
  padding: var(--spacing-24) 0;
}

/* Hero section */
.hero {
  position: relative;
  padding: var(--spacing-20) 0;
  background: radial-gradient(ellipse at center, rgba(255, 0, 110, 0.08) 0%, transparent 60%),
              radial-gradient(ellipse at 80% 20%, rgba(0, 245, 255, 0.06) 0%, transparent 50%);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: repeating-linear-gradient(
    0deg,
    rgba(0, 245, 255, 0.03) 0px,
    transparent 2px,
    transparent 4px
  );
  pointer-events: none;
}

/* ============================================
   ACCESSIBILITY
   ============================================ */

/* Focus visible styles */
*:focus-visible {
  outline: 2px solid var(--color-secondary);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* Skip to main content */
.skip-to-main {
  position: absolute;
  top: -100%;
  left: 0;
  background: var(--color-secondary);
  color: var(--color-text-inverse);
  padding: var(--spacing-3) var(--spacing-6);
  border-radius: 0 0 var(--radius-base) 0;
  font-weight: var(--font-weight-bold);
  z-index: var(--z-tooltip);
  transition: top var(--transition-base);
}

.skip-to-main:focus {
  top: 0;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  .btn::before {
    transition: none;
  }
  
  .card {
    transition: none;
  }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
  :root {
    --color-background: #000000;
    --color-text: #ffffff;
  }
  
  .btn {
    border-width: 3px;
  }
  
  .card {
    border-width: 2px;
  }
}

/* Dark mode support (already dark by default) */
@media (prefers-color-scheme: light) {
  /* Keep dark theme even in light mode preference */
}

/* ============================================
   UTILITY CLASSES - RESPONSIVE
   ============================================ */

@media (max-width: 639px) {
  .sm\:hidden { display: none; }
}

@media (min-width: 640px) {
  .sm\:block { display: block; }
  .sm\:flex { display: flex; }
  .sm\:hidden { display: none; }
}

@media (min-width: 768px) {
  .md\:block { display: block; }
  .md\:flex { display: flex; }
  .md\:hidden { display: none; }
}

@media (min-width: 1024px) {
  .lg\:block { display: block; }
  .lg\:flex { display: flex; }
  .lg\:hidden { display: none; }
}

/* ============================================
   ANIMATIONS
   ============================================ */

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

@keyframes slideUp {
  from {
    transform: translateY(20px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

@keyframes glow {
  0%, 100% {
    box-shadow: 0 0 20px var(--color-secondary-glow);
  }
  50% {
    box-shadow: 0 0 40px var(--color-secondary-glow), 0 0 60px var(--color-secondary-glow);
  }
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

.animate-fade-in {
  animation: fadeIn var(--transition-slow) ease-out;
}

.animate-slide-up {
  animation: slideUp var(--transition-slow) ease-out;
}

.animate-glow {
  animation: glow 2s ease-in-out infinite;
}

.animate-pulse {
  animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

/* ============================================
   PRINT STYLES
   ============================================ */

@media print {
  *,
  *::before,
  *::after {
    background: transparent !important;
    color: #000 !important;
    box-shadow: none !important;
    text-shadow: none !important;
  }
  
  a,
  a:visited {
    text-decoration: underline;
  }
  
  a[href]::after {
    content: " (" attr(href) ")";
  }
  
  abbr[title]::after {
    content: " (" attr(title) ")";
  }
  
  pre {
    white-space: pre-wrap !important;
  }
  
  pre,
  blockquote {
    border: 1px solid #999;
    page-break-inside: avoid;
  }
  
  thead {
    display: table-header-group;
  }
  
  tr,
  img {
    page-break-inside: avoid;
  }
  
  p,
  h2,
  h3 {
    orphans: 3;
    widows: 3;
  }
  
  h2,
  h3 {
    page-break-after: avoid;
  }
  
  .no-print {
    display: none !important;
  }
}