/**
 * TRADEUP.TF DESIGN SYSTEM - CSS FOUNDATION
 * ============================================================
 *
 * LOCKED UI CONTRACT v1.0
 * This file is the source of truth for all styling.
 * DO NOT use ad-hoc colors, spacing, or sizing outside these tokens.
 *
 * Breaking changes require version bump + design review.
 *
 * @version 2.0.0 - Modern 2025 Design Update
 */

/* =============================================================
   MODERN FONT IMPORT (Inter - Premium Web Font)
   ============================================================= */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

/* =============================================================
   CSS CUSTOM PROPERTIES (TOKENS)
   ============================================================= */

:root {
  /* ─────────────────────────────────────────────────────────────
     COLORS - BACKGROUND
     ───────────────────────────────────────────────────────────── */
  --color-bg-primary: #0f1419;
  --color-bg-secondary: #1a1f2e;
  --color-bg-tertiary: #232b3b;
  --color-bg-card: #1e2532;
  --color-bg-elevated: #2d3548;
  --color-bg-overlay: rgba(0, 0, 0, 0.6);

  /* ─────────────────────────────────────────────────────────────
     COLORS - TEXT
     ───────────────────────────────────────────────────────────── */
  --color-text-primary: #e6edf3;
  --color-text-secondary: #8b949e;
  --color-text-muted: #6e7681;
  --color-text-inverse: #0f1419;

  /* ─────────────────────────────────────────────────────────────
     COLORS - BORDER
     ───────────────────────────────────────────────────────────── */
  --color-border-default: #30363d;
  --color-border-subtle: #21262d;
  --color-border-strong: #484f58;

  /* ─────────────────────────────────────────────────────────────
     COLORS - SEMANTIC / ACCENT
     ───────────────────────────────────────────────────────────── */
  --color-accent-green: #3fb950;
  --color-accent-red: #f85149;
  --color-accent-yellow: #d29922;
  --color-accent-blue: #58a6ff;
  --color-accent-purple: #a371f7;
  --color-accent-orange: #db6d28;

  /* Semantic aliases */
  --color-success: var(--color-accent-green);
  --color-danger: var(--color-accent-red);
  --color-warning: var(--color-accent-yellow);
  --color-info: var(--color-accent-blue);

  /* ─────────────────────────────────────────────────────────────
     COLORS - TF2 GRADES (LOCKED - Match Steam exactly)
     ───────────────────────────────────────────────────────────── */
  --color-grade-civilian: #B0C3D9;
  --color-grade-freelance: #5E98D9;
  --color-grade-mercenary: #4B69FF;
  --color-grade-commando: #8847FF;
  --color-grade-assassin: #D32CE6;
  --color-grade-elite: #EB4B4B;

  /* ─────────────────────────────────────────────────────────────
     COLORS - INTERACTIVE STATES
     ───────────────────────────────────────────────────────────── */
  --color-state-hover: rgba(255, 255, 255, 0.05);
  --color-state-active: rgba(255, 255, 255, 0.08);
  --color-state-focus: rgba(88, 166, 255, 0.4);
  --color-state-disabled: rgba(255, 255, 255, 0.1);

  /* ─────────────────────────────────────────────────────────────
     SPACING (4px base unit)
     ───────────────────────────────────────────────────────────── */
  --space-0: 0;
  --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;
  --space-20: 80px;

  /* ─────────────────────────────────────────────────────────────
     TYPOGRAPHY
     ───────────────────────────────────────────────────────────── */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans', Helvetica, Arial, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', 'Fira Code', Consolas, monospace;
  --font-display: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

  /* Font Sizes */
  --text-xs: 11px;
  --text-sm: 12px;
  --text-base: 14px;
  --text-md: 16px;
  --text-lg: 18px;
  --text-xl: 20px;
  --text-2xl: 24px;
  --text-3xl: 30px;
  --text-4xl: 36px;

  /* Line Heights */
  --leading-xs: 16px;
  --leading-sm: 18px;
  --leading-base: 22px;
  --leading-md: 24px;
  --leading-lg: 28px;
  --leading-xl: 28px;
  --leading-2xl: 32px;
  --leading-3xl: 36px;
  --leading-4xl: 42px;

  /* Font Weights */
  --font-normal: 400;
  --font-medium: 500;
  --font-semibold: 600;
  --font-bold: 700;

  /* Letter Spacing */
  --tracking-tight: -0.02em;
  --tracking-normal: 0;
  --tracking-wide: 0.02em;
  --tracking-wider: 0.05em;
  --tracking-caps: 0.08em;

  /* ─────────────────────────────────────────────────────────────
     BORDER RADIUS
     ───────────────────────────────────────────────────────────── */
  --radius-none: 0;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --radius-xl: 12px;
  --radius-2xl: 16px;
  --radius-full: 9999px;

  /* ─────────────────────────────────────────────────────────────
     SHADOWS
     ───────────────────────────────────────────────────────────── */
  --shadow-none: none;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.4);
  --shadow-xl: 0 12px 24px rgba(0, 0, 0, 0.5);
  --shadow-inner: inset 0 1px 2px rgba(0, 0, 0, 0.2);

  /* Glow effects */
  --shadow-glow-green: 0 0 12px rgba(63, 185, 80, 0.4);
  --shadow-glow-red: 0 0 12px rgba(248, 81, 73, 0.4);
  --shadow-glow-blue: 0 0 12px rgba(88, 166, 255, 0.4);
  --shadow-glow-purple: 0 0 12px rgba(163, 113, 247, 0.4);

  /* ─────────────────────────────────────────────────────────────
     MOTION / ANIMATION
     ───────────────────────────────────────────────────────────── */
  --duration-instant: 50ms;
  --duration-fast: 100ms;
  --duration-normal: 200ms;
  --duration-slow: 300ms;
  --duration-slower: 500ms;

  --ease-default: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-in: cubic-bezier(0.4, 0, 1, 1);
  --ease-out: cubic-bezier(0, 0, 0.2, 1);
  --ease-in-out: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);

  /* Transition presets */
  --transition-fast: all 100ms var(--ease-default);
  --transition-normal: all 200ms var(--ease-default);
  --transition-slow: all 300ms var(--ease-default);
  --transition-colors: color 200ms, background-color 200ms, border-color 200ms;

  /* ─────────────────────────────────────────────────────────────
     Z-INDEX SCALE
     ───────────────────────────────────────────────────────────── */
  --z-base: 0;
  --z-dropdown: 100;
  --z-sticky: 200;
  --z-header: 300;
  --z-overlay: 400;
  --z-modal: 500;
  --z-popover: 600;
  --z-toast: 700;
  --z-tooltip: 800;
  --z-max: 9999;

  /* ─────────────────────────────────────────────────────────────
     COMPONENT SIZES
     ───────────────────────────────────────────────────────────── */
  /* Button heights */
  --btn-height-sm: 28px;
  --btn-height-md: 36px;
  --btn-height-lg: 44px;

  /* Input heights */
  --input-height-sm: 28px;
  --input-height-md: 36px;
  --input-height-lg: 44px;

  /* Icon sizes */
  --icon-xs: 12px;
  --icon-sm: 14px;
  --icon-md: 16px;
  --icon-lg: 20px;
  --icon-xl: 24px;
  --icon-2xl: 32px;

  /* Content width */
  --content-max-width: 1440px;
  --content-narrow: 680px;
  --content-wide: 1200px;

  /* ─────────────────────────────────────────────────────────────
     MODERN 2025 DESIGN TOKENS
     ───────────────────────────────────────────────────────────── */

  /* Gradient Backgrounds */
  --gradient-hero: linear-gradient(135deg, #0f1419 0%, #1a1f2e 50%, #0f1419 100%);
  --gradient-mesh: radial-gradient(at 40% 20%, rgba(88, 166, 255, 0.12) 0px, transparent 50%),
                   radial-gradient(at 80% 0%, rgba(163, 113, 247, 0.1) 0px, transparent 50%),
                   radial-gradient(at 0% 50%, rgba(63, 185, 80, 0.08) 0px, transparent 50%),
                   radial-gradient(at 80% 50%, rgba(248, 81, 73, 0.08) 0px, transparent 50%),
                   radial-gradient(at 0% 100%, rgba(88, 166, 255, 0.1) 0px, transparent 50%),
                   radial-gradient(at 80% 100%, rgba(163, 113, 247, 0.08) 0px, transparent 50%);
  --gradient-card: linear-gradient(135deg, rgba(30, 37, 50, 0.8) 0%, rgba(26, 31, 46, 0.6) 100%);
  --gradient-glow: linear-gradient(135deg, var(--color-accent-blue) 0%, var(--color-accent-purple) 100%);
  --gradient-success: linear-gradient(135deg, #3fb950 0%, #2ea043 100%);
  --gradient-danger: linear-gradient(135deg, #f85149 0%, #da3633 100%);
  --gradient-primary: linear-gradient(135deg, #58a6ff 0%, #4a94e8 50%, #3b82f6 100%);

  /* Glassmorphism */
  --glass-bg: rgba(30, 37, 50, 0.7);
  --glass-bg-light: rgba(45, 53, 72, 0.5);
  --glass-border: rgba(255, 255, 255, 0.08);
  --glass-border-light: rgba(255, 255, 255, 0.12);
  --glass-blur: blur(20px);
  --glass-blur-strong: blur(40px);

  /* Modern Shadows with Color */
  --shadow-glow-primary: 0 0 30px rgba(88, 166, 255, 0.25), 0 0 60px rgba(88, 166, 255, 0.1);
  --shadow-glow-success: 0 0 30px rgba(63, 185, 80, 0.25), 0 0 60px rgba(63, 185, 80, 0.1);
  --shadow-glow-purple: 0 0 30px rgba(163, 113, 247, 0.25), 0 0 60px rgba(163, 113, 247, 0.1);
  --shadow-card: 0 4px 6px -1px rgba(0, 0, 0, 0.2), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-card-hover: 0 20px 25px -5px rgba(0, 0, 0, 0.3), 0 8px 10px -6px rgba(0, 0, 0, 0.2);
  --shadow-elevated: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
  --shadow-inner-glow: inset 0 1px 0 rgba(255, 255, 255, 0.05);

  /* Button Specific */
  --btn-gradient-primary: linear-gradient(135deg, #58a6ff 0%, #3b82f6 100%);
  --btn-gradient-secondary: linear-gradient(135deg, rgba(45, 53, 72, 0.8) 0%, rgba(35, 43, 59, 0.8) 100%);
  --btn-shadow-primary: 0 4px 14px rgba(88, 166, 255, 0.4);
  --btn-shadow-primary-hover: 0 6px 20px rgba(88, 166, 255, 0.5);

  /* Noise Texture (inline SVG) */
  --noise-texture: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");

  /* Animation Easings */
  --ease-spring: cubic-bezier(0.175, 0.885, 0.32, 1.275);
  --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-out-expo: cubic-bezier(0.19, 1, 0.22, 1);
}

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

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

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

body {
  font-family: var(--font-sans);
  font-size: var(--text-base);
  line-height: var(--leading-base);
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  min-height: 100vh;
}

/* =============================================================
   FOCUS STYLES (Accessibility)
   ============================================================= */

:focus-visible {
  outline: 2px solid var(--color-accent-blue);
  outline-offset: 2px;
}

/* =============================================================
   UTILITY CLASSES
   ============================================================= */

/* Text Colors */
.text-primary { color: var(--color-text-primary); }
.text-secondary { color: var(--color-text-secondary); }
.text-muted { color: var(--color-text-muted); }
.text-success { color: var(--color-accent-green); }
.text-danger { color: var(--color-accent-red); }
.text-warning { color: var(--color-accent-yellow); }
.text-info { color: var(--color-accent-blue); }

/* Background Colors */
.bg-primary { background-color: var(--color-bg-primary); }
.bg-secondary { background-color: var(--color-bg-secondary); }
.bg-tertiary { background-color: var(--color-bg-tertiary); }
.bg-card { background-color: var(--color-bg-card); }
.bg-elevated { background-color: var(--color-bg-elevated); }

/* Font Sizes */
.text-xs { font-size: var(--text-xs); line-height: var(--leading-xs); }
.text-sm { font-size: var(--text-sm); line-height: var(--leading-sm); }
.text-base { font-size: var(--text-base); line-height: var(--leading-base); }
.text-md { font-size: var(--text-md); line-height: var(--leading-md); }
.text-lg { font-size: var(--text-lg); line-height: var(--leading-lg); }
.text-xl { font-size: var(--text-xl); line-height: var(--leading-xl); }
.text-2xl { font-size: var(--text-2xl); line-height: var(--leading-2xl); }
.text-3xl { font-size: var(--text-3xl); line-height: var(--leading-3xl); }

/* Font Weights */
.font-normal { font-weight: var(--font-normal); }
.font-medium { font-weight: var(--font-medium); }
.font-semibold { font-weight: var(--font-semibold); }
.font-bold { font-weight: var(--font-bold); }

/* Monospace */
.font-mono { font-family: var(--font-mono); }

/* Spacing Utilities */
.p-0 { padding: var(--space-0); }
.p-1 { padding: var(--space-1); }
.p-2 { padding: var(--space-2); }
.p-3 { padding: var(--space-3); }
.p-4 { padding: var(--space-4); }
.p-5 { padding: var(--space-5); }
.p-6 { padding: var(--space-6); }
.p-8 { padding: var(--space-8); }

.m-0 { margin: var(--space-0); }
.m-1 { margin: var(--space-1); }
.m-2 { margin: var(--space-2); }
.m-3 { margin: var(--space-3); }
.m-4 { margin: var(--space-4); }
.m-5 { margin: var(--space-5); }
.m-6 { margin: var(--space-6); }
.m-8 { margin: var(--space-8); }

.mb-0 { margin-bottom: var(--space-0); }
.mb-1 { margin-bottom: var(--space-1); }
.mb-2 { margin-bottom: var(--space-2); }
.mb-3 { margin-bottom: var(--space-3); }
.mb-4 { margin-bottom: var(--space-4); }
.mb-5 { margin-bottom: var(--space-5); }
.mb-6 { margin-bottom: var(--space-6); }
.mb-8 { margin-bottom: var(--space-8); }

.mt-0 { margin-top: var(--space-0); }
.mt-1 { margin-top: var(--space-1); }
.mt-2 { margin-top: var(--space-2); }
.mt-3 { margin-top: var(--space-3); }
.mt-4 { margin-top: var(--space-4); }
.mt-5 { margin-top: var(--space-5); }
.mt-6 { margin-top: var(--space-6); }
.mt-8 { margin-top: var(--space-8); }

/* Gap utilities */
.gap-1 { gap: var(--space-1); }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-5 { gap: var(--space-5); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }

/* Border Radius */
.rounded-none { border-radius: var(--radius-none); }
.rounded-sm { border-radius: var(--radius-sm); }
.rounded-md { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }
.rounded-2xl { border-radius: var(--radius-2xl); }
.rounded-full { border-radius: var(--radius-full); }

/* Shadows */
.shadow-none { box-shadow: var(--shadow-none); }
.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-xl { box-shadow: var(--shadow-xl); }

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

/* Flexbox */
.flex-row { flex-direction: row; }
.flex-col { flex-direction: column; }
.items-start { align-items: flex-start; }
.items-center { align-items: center; }
.items-end { align-items: flex-end; }
.justify-start { justify-content: flex-start; }
.justify-center { justify-content: center; }
.justify-end { justify-content: flex-end; }
.justify-between { justify-content: space-between; }
.flex-wrap { flex-wrap: wrap; }
.flex-1 { flex: 1; }
.flex-shrink-0 { flex-shrink: 0; }

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

/* Height */
.h-full { height: 100%; }
.h-screen { height: 100vh; }
.min-h-screen { min-height: 100vh; }

/* Overflow */
.overflow-hidden { overflow: hidden; }
.overflow-auto { overflow: auto; }
.overflow-x-auto { overflow-x: auto; }
.overflow-y-auto { overflow-y: auto; }

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

/* Cursor */
.cursor-pointer { cursor: pointer; }
.cursor-not-allowed { cursor: not-allowed; }

/* Opacity */
.opacity-0 { opacity: 0; }
.opacity-50 { opacity: 0.5; }
.opacity-75 { opacity: 0.75; }
.opacity-100 { opacity: 1; }

/* Transitions */
.transition { transition: var(--transition-normal); }
.transition-fast { transition: var(--transition-fast); }
.transition-slow { transition: var(--transition-slow); }
.transition-colors { transition: var(--transition-colors); }

/* Text utilities */
.text-left { text-align: left; }
.text-center { text-align: center; }
.text-right { text-align: right; }
.uppercase { text-transform: uppercase; }
.lowercase { text-transform: lowercase; }
.capitalize { text-transform: capitalize; }
.truncate {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.whitespace-nowrap { white-space: nowrap; }
.break-words { word-wrap: break-word; }

/* 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: 0;
}

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

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

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

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

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

@keyframes slideInUp {
  from {
    transform: translateY(10px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

@keyframes slideInDown {
  from {
    transform: translateY(-10px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

@keyframes shimmer {
  0% { background-position: -200% 0; }
  100% { background-position: 200% 0; }
}

.animate-spin { animation: spin 1s linear infinite; }
.animate-pulse { animation: pulse 2s ease-in-out infinite; }
.animate-fade-in { animation: fadeIn var(--duration-normal) var(--ease-out); }
.animate-slide-up { animation: slideInUp var(--duration-normal) var(--ease-out); }
.animate-slide-down { animation: slideInDown var(--duration-normal) var(--ease-out); }

/* =============================================================
   SCROLLBAR STYLING
   ============================================================= */

::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--color-bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--color-border-default);
  border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-border-strong);
}

/* Firefox */
* {
  scrollbar-width: thin;
  scrollbar-color: var(--color-border-default) var(--color-bg-primary);
}

/* =============================================================
   SELECTION STYLING
   ============================================================= */

::selection {
  background-color: var(--color-accent-blue);
  color: var(--color-text-inverse);
}

/* =============================================================
   MEDIA QUERIES (Breakpoints)
   ============================================================= */

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

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

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

/* Extra Large (1280px) */
@media (min-width: 1280px) {
  .xl\:hidden { display: none; }
  .xl\:block { display: block; }
  .xl\:flex { display: flex; }
  .xl\:grid { display: grid; }
}

/* =============================================================
   LINK & BUTTON STYLES
   ============================================================= */

/* Base link styles */
a {
  color: var(--color-accent-blue);
  text-decoration: none;
  transition: var(--transition-fast);
}

a:hover {
  color: var(--color-text-primary);
  text-decoration: underline;
}

/* Primary CTA Button */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  background-color: var(--color-accent-blue);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition-fast);
}

.btn-primary:hover {
  background-color: #4a94e8;
  text-decoration: none;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

/* Secondary Button */
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  background-color: transparent;
  color: var(--color-text-primary);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-md);
  font-size: var(--text-base);
  font-weight: var(--font-medium);
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition-fast);
}

.btn-secondary:hover {
  background-color: var(--color-state-hover);
  border-color: var(--color-border-strong);
  text-decoration: none;
}

.btn-secondary:active {
  background-color: var(--color-state-active);
}

/* Ghost Button */
.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  background-color: transparent;
  color: var(--color-text-secondary);
  border: none;
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition-fast);
}

.btn-ghost:hover {
  background-color: var(--color-state-hover);
  color: var(--color-text-primary);
  text-decoration: none;
}

/* Danger Button */
.btn-danger {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  background-color: var(--color-accent-red);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition-fast);
}

.btn-danger:hover {
  background-color: #e03d35;
  text-decoration: none;
}

/* Success Button */
.btn-success {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-5);
  background-color: var(--color-accent-green);
  color: white;
  border: none;
  border-radius: var(--radius-md);
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  text-decoration: none;
  cursor: pointer;
  transition: var(--transition-fast);
}

.btn-success:hover {
  background-color: #36a346;
  text-decoration: none;
}

/* Button sizes */
.btn-sm {
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
}

.btn-lg {
  padding: var(--space-4) var(--space-6);
  font-size: var(--text-lg);
}

/* Disabled state */
.btn-primary:disabled,
.btn-secondary:disabled,
.btn-ghost:disabled,
.btn-danger:disabled,
.btn-success:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

/* =============================================================
   INTERACTIVE CARD STYLES
   ============================================================= */

.card-interactive {
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
  transition: var(--transition-fast);
  cursor: pointer;
}

.card-interactive:hover {
  border-color: var(--color-border-strong);
  background-color: var(--color-bg-elevated);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.card-interactive:active {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

/* =============================================================
   INPUT & FORM STYLES
   ============================================================= */

.input {
  width: 100%;
  padding: var(--space-3);
  background-color: var(--color-bg-tertiary);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  font-size: var(--text-base);
  outline: none;
  transition: var(--transition-fast);
}

.input:focus {
  border-color: var(--color-accent-blue);
  box-shadow: 0 0 0 3px var(--color-state-focus);
}

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

.input:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* =============================================================
   BADGE STYLES
   ============================================================= */

.badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: var(--font-semibold);
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.badge-blue {
  background-color: rgba(88, 166, 255, 0.15);
  color: var(--color-accent-blue);
}

.badge-green {
  background-color: rgba(63, 185, 80, 0.15);
  color: var(--color-accent-green);
}

.badge-red {
  background-color: rgba(248, 81, 73, 0.15);
  color: var(--color-accent-red);
}

.badge-yellow {
  background-color: rgba(210, 153, 34, 0.15);
  color: var(--color-accent-yellow);
}

.badge-purple {
  background-color: rgba(163, 113, 247, 0.15);
  color: var(--color-accent-purple);
}

.badge-gray {
  background-color: var(--color-bg-tertiary);
  color: var(--color-text-secondary);
}

/* =============================================================
   MODERN 2025 COMPONENT STYLES
   ============================================================= */

/* Glassmorphism Card */
.glass-card {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-card), var(--shadow-inner-glow);
  transition: all 0.3s var(--ease-out-expo);
}

.glass-card:hover {
  border-color: var(--glass-border-light);
  box-shadow: var(--shadow-card-hover), var(--shadow-inner-glow);
  transform: translateY(-4px);
}

/* Modern Hero Background */
.hero-modern {
  position: relative;
  background: var(--gradient-hero);
  overflow: hidden;
}

.hero-modern::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--gradient-mesh);
  opacity: 1;
  animation: meshFloat 20s ease-in-out infinite;
}

.hero-modern::after {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--noise-texture);
  opacity: 0.03;
  pointer-events: none;
}

@keyframes meshFloat {
  0%, 100% { transform: scale(1) translateY(0); }
  50% { transform: scale(1.1) translateY(-20px); }
}

/* Animated Gradient Orbs */
.gradient-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.5;
  animation: orbFloat 15s ease-in-out infinite;
}

.gradient-orb.blue {
  background: radial-gradient(circle, rgba(88, 166, 255, 0.4) 0%, transparent 70%);
}

.gradient-orb.purple {
  background: radial-gradient(circle, rgba(163, 113, 247, 0.4) 0%, transparent 70%);
}

.gradient-orb.green {
  background: radial-gradient(circle, rgba(63, 185, 80, 0.3) 0%, transparent 70%);
}

@keyframes orbFloat {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(30px, -30px) scale(1.1); }
  66% { transform: translate(-20px, 20px) scale(0.9); }
}

@keyframes float {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(20px, -20px); }
}

/* Modern Gradient Button */
.btn-gradient {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  background: var(--btn-gradient-primary);
  color: white;
  border: none;
  border-radius: var(--radius-lg);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  text-decoration: none;
  cursor: pointer;
  box-shadow: var(--btn-shadow-primary);
  transition: all 0.3s var(--ease-spring);
  position: relative;
  overflow: hidden;
}

.btn-gradient::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.2) 0%, transparent 50%);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.btn-gradient:hover {
  transform: translateY(-2px);
  box-shadow: var(--btn-shadow-primary-hover);
}

.btn-gradient:hover::before {
  opacity: 1;
}

.btn-gradient:active {
  transform: translateY(0);
  box-shadow: var(--btn-shadow-primary);
}

/* Outline Gradient Button */
.btn-outline-gradient {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  background: transparent;
  color: var(--color-text-primary);
  border: 2px solid transparent;
  border-radius: var(--radius-lg);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: var(--font-semibold);
  text-decoration: none;
  cursor: pointer;
  position: relative;
  transition: all 0.3s var(--ease-spring);
  background-clip: padding-box;
}

.btn-outline-gradient::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  padding: 2px;
  background: linear-gradient(135deg, var(--color-border-strong) 0%, var(--color-border-default) 100%);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
}

.btn-outline-gradient:hover {
  background: var(--glass-bg-light);
  transform: translateY(-2px);
}

.btn-outline-gradient:hover::before {
  background: linear-gradient(135deg, var(--color-accent-blue) 0%, var(--color-accent-purple) 100%);
}

/* Glow Text */
.glow-text {
  background: var(--gradient-glow);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  text-shadow: 0 0 40px rgba(88, 166, 255, 0.3);
}

/* Stat Card Modern */
.stat-card-modern {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: var(--space-5);
  text-align: center;
  transition: all 0.3s var(--ease-out-expo);
}

.stat-card-modern:hover {
  border-color: var(--glass-border-light);
  transform: translateY(-2px);
}

.stat-value-modern {
  font-size: var(--text-3xl);
  font-weight: var(--font-bold);
  background: var(--gradient-glow);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--space-1);
}

.stat-label-modern {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Feature Card Modern */
.feature-card-modern {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  transition: all 0.4s var(--ease-out-expo);
  position: relative;
  overflow: hidden;
}

.feature-card-modern::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--glass-border-light), transparent);
  opacity: 0;
  transition: opacity 0.4s ease;
}

.feature-card-modern:hover {
  border-color: var(--glass-border-light);
  transform: translateY(-6px);
  box-shadow: var(--shadow-card-hover);
}

.feature-card-modern:hover::before {
  opacity: 1;
}

.feature-icon-modern {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-4);
  position: relative;
  overflow: hidden;
}

.feature-icon-modern.blue {
  background: linear-gradient(135deg, rgba(88, 166, 255, 0.2) 0%, rgba(88, 166, 255, 0.05) 100%);
  box-shadow: 0 0 20px rgba(88, 166, 255, 0.15);
}

.feature-icon-modern.green {
  background: linear-gradient(135deg, rgba(63, 185, 80, 0.2) 0%, rgba(63, 185, 80, 0.05) 100%);
  box-shadow: 0 0 20px rgba(63, 185, 80, 0.15);
}

.feature-icon-modern.purple {
  background: linear-gradient(135deg, rgba(163, 113, 247, 0.2) 0%, rgba(163, 113, 247, 0.05) 100%);
  box-shadow: 0 0 20px rgba(163, 113, 247, 0.15);
}

.feature-icon-modern.yellow {
  background: linear-gradient(135deg, rgba(210, 153, 34, 0.2) 0%, rgba(210, 153, 34, 0.05) 100%);
  box-shadow: 0 0 20px rgba(210, 153, 34, 0.15);
}

.feature-icon-modern.orange {
  background: linear-gradient(135deg, rgba(219, 109, 40, 0.2) 0%, rgba(219, 109, 40, 0.05) 100%);
  box-shadow: 0 0 20px rgba(219, 109, 40, 0.15);
}

.feature-icon-modern.red {
  background: linear-gradient(135deg, rgba(248, 81, 73, 0.2) 0%, rgba(248, 81, 73, 0.05) 100%);
  box-shadow: 0 0 20px rgba(248, 81, 73, 0.15);
}

/* Step Card Modern */
.step-card-modern {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  text-align: center;
  transition: all 0.4s var(--ease-out-expo);
  position: relative;
}

.step-card-modern:hover {
  border-color: var(--glass-border-light);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow-primary);
}

.step-number-modern {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--btn-gradient-primary);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: var(--text-2xl);
  font-weight: var(--font-bold);
  margin: 0 auto var(--space-5);
  box-shadow: var(--btn-shadow-primary);
  position: relative;
}

.step-number-modern::after {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  border: 2px solid rgba(88, 166, 255, 0.3);
  animation: pulseRing 2s ease-in-out infinite;
}

@keyframes pulseRing {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.1); opacity: 0.5; }
}

/* Section Divider */
.section-divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-border-default), transparent);
  margin: var(--space-12) 0;
}

/* Floating Animation for Cards */
@keyframes floatCard {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.float-animation {
  animation: floatCard 6s ease-in-out infinite;
}

/* Shimmer Effect */
.shimmer {
  background: linear-gradient(
    90deg,
    var(--color-bg-card) 0%,
    var(--color-bg-elevated) 50%,
    var(--color-bg-card) 100%
  );
  background-size: 200% 100%;
  animation: shimmer 2s infinite;
}

/* Entry Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInScale {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

.animate-fade-in-up {
  animation: fadeInUp 0.6s var(--ease-out-expo) forwards;
}

.animate-fade-in-scale {
  animation: fadeInScale 0.5s var(--ease-out-expo) forwards;
}

/* Stagger Children Animations */
.stagger-children > *:nth-child(1) { animation-delay: 0ms; }
.stagger-children > *:nth-child(2) { animation-delay: 100ms; }
.stagger-children > *:nth-child(3) { animation-delay: 200ms; }
.stagger-children > *:nth-child(4) { animation-delay: 300ms; }
.stagger-children > *:nth-child(5) { animation-delay: 400ms; }
.stagger-children > *:nth-child(6) { animation-delay: 500ms; }

/* Gradient Border Animation */
@keyframes borderGlow {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 1; }
}

.border-glow {
  position: relative;
}

.border-glow::after {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(135deg, var(--color-accent-blue), var(--color-accent-purple), var(--color-accent-blue));
  background-size: 200% 200%;
  animation: borderGlow 3s ease-in-out infinite;
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
}