/* ========================================
   SPACEBAR CLICKER V2 — Brand Design System
   Glamorous · Colorful · Mobile-First
   ======================================== */

:root {
  /* Brand Colors — Glamorous Multi-Color */
  --color-bg-deep: #06070d;
  --color-bg-surface: #0d1117;
  --color-bg-card: rgba(16, 22, 36, 0.7);
  --color-primary: #a855f7;
  --color-primary-light: #c084fc;
  --color-primary-glow: rgba(168, 85, 247, 0.35);
  --color-secondary: #06b6d4;
  --color-secondary-light: #22d3ee;
  --color-secondary-glow: rgba(6, 182, 212, 0.25);
  --color-accent: #f59e0b;
  --color-accent-light: #fbbf24;
  --color-accent-glow: rgba(245, 158, 11, 0.3);
  --color-pink: #ec4899;
  --color-pink-glow: rgba(236, 72, 153, 0.3);
  --color-green: #10b981;
  --color-green-glow: rgba(16, 185, 129, 0.3);
  --color-red: #ef4444;
  --color-text: #e2e8f0;
  --color-text-muted: #94a3b8;
  --color-text-heading: #ffffff;
  --color-success: #10b981;
  --color-border: rgba(148, 163, 184, 0.1);

  /* Glassmorphism */
  --glass-bg: rgba(16, 22, 36, 0.55);
  --glass-border: rgba(148, 163, 184, 0.12);
  --glass-blur: 20px;

  /* Gradients */
  --gradient-hero: linear-gradient(135deg, #a855f7 0%, #ec4899 50%, #f59e0b 100%);
  --gradient-primary: linear-gradient(135deg, #a855f7, #7c3aed);
  --gradient-warm: linear-gradient(135deg, #f59e0b, #ef4444);
  --gradient-cool: linear-gradient(135deg, #06b6d4, #3b82f6);
  --gradient-cosmic: linear-gradient(135deg, #7c3aed, #ec4899, #f59e0b);

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --space-4xl: 6rem;

  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-glow-primary: 0 0 30px var(--color-primary-glow);
  --shadow-glow-secondary: 0 0 20px var(--color-secondary-glow);
  --shadow-glow-accent: 0 0 25px var(--color-accent-glow);
  --shadow-glow-pink: 0 0 20px var(--color-pink-glow);
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
  --shadow-elevated: 0 20px 60px rgba(0, 0, 0, 0.6);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* --- Global Reset & Base --- */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--color-bg-deep);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--color-secondary-light);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary-light);
}

img,
svg {
  max-width: 100%;
  display: block;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  color: var(--color-text-heading);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

/* --- Utility --- */
.container {
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

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

/* --- Glass Panel --- */
.glass-panel {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}

/* --- Canvas Background --- */
#spaceBg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

/* --- Site Header --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(6, 7, 13, 0.75);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-sm) 0;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-text-heading);
  letter-spacing: -0.02em;
}

.brand .logo-icon {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-hero);
  box-shadow: var(--shadow-glow-primary);
}

.brand .logo-icon svg {
  width: 18px;
  height: 18px;
  fill: #fff;
}

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

.nav-links {
  display: flex;
  list-style: none;
  gap: var(--space-lg);
}

.nav-links a {
  color: var(--color-text-muted);
  font-size: 0.88rem;
  font-weight: 500;
  transition: color var(--transition-fast);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-hero);
  transition: width var(--transition-base);
  border-radius: 1px;
}

.nav-links a:hover {
  color: var(--color-text-heading);
}

.nav-links a:hover::after {
  width: 100%;
}

.nav-links a.active {
  color: var(--color-primary-light);
}

.nav-links a.active::after {
  width: 100%;
}

/* Audio Controls */
.audio-controls {
  display: flex;
  gap: var(--space-xs);
}

.audio-btn {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  border: 1px solid var(--glass-border);
  background: var(--glass-bg);
  color: var(--color-text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-base);
  position: relative;
}

.audio-btn svg {
  width: 16px;
  height: 16px;
  fill: currentColor;
}

.audio-btn:hover {
  color: var(--color-primary-light);
  border-color: var(--color-primary);
  box-shadow: var(--shadow-glow-primary);
}

.audio-btn.active {
  color: var(--color-accent);
  border-color: var(--color-accent);
  background: rgba(245, 158, 11, 0.1);
}

.audio-btn .tooltip {
  position: absolute;
  bottom: -30px;
  white-space: nowrap;
  font-size: 0.7rem;
  background: var(--color-bg-surface);
  padding: 2px 8px;
  border-radius: 4px;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-fast);
}

.audio-btn:hover .tooltip {
  opacity: 1;
}

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
  flex-direction: column;
  gap: 5px;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-text);
  transition: var(--transition-base);
  border-radius: 2px;
}

/* --- Footer --- */
.site-footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--color-border);
  background: rgba(6, 7, 13, 0.92);
  padding: var(--space-2xl) 0 var(--space-lg);
  margin-top: var(--space-3xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--space-2xl);
  margin-bottom: var(--space-2xl);
}

.footer-brand p {
  color: var(--color-text-muted);
  margin-top: var(--space-sm);
  font-size: 0.88rem;
  max-width: 320px;
}

.footer-col h4 {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
}

.footer-col ul {
  list-style: none;
}

.footer-col ul li+li {
  margin-top: var(--space-sm);
}

.footer-col ul a {
  color: var(--color-text);
  font-size: 0.88rem;
}

.footer-col ul a:hover {
  color: var(--color-secondary-light);
}

.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding-top: var(--space-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.78rem;
  color: var(--color-text-muted);
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-xl);
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 0.9rem;
  border: none;
  cursor: pointer;
  transition: all var(--transition-base);
  font-family: inherit;
}

.btn-primary {
  background: var(--gradient-primary);
  color: #fff;
  box-shadow: var(--shadow-glow-primary);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 45px var(--color-primary-glow);
}

.btn-secondary {
  background: transparent;
  color: var(--color-secondary-light);
  border: 1px solid var(--color-secondary);
}

.btn-secondary:hover {
  background: rgba(6, 182, 212, 0.1);
  transform: translateY(-2px);
}

/* --- Section Titles (reusable) --- */
.section-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-xs) var(--space-md);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-md);
  border: 1px solid;
}

.section-badge.purple {
  color: var(--color-primary-light);
  border-color: rgba(168, 85, 247, 0.3);
  background: rgba(168, 85, 247, 0.08);
}

.section-badge.cyan {
  color: var(--color-secondary-light);
  border-color: rgba(6, 182, 212, 0.3);
  background: rgba(6, 182, 212, 0.08);
}

.section-badge.amber {
  color: var(--color-accent-light);
  border-color: rgba(245, 158, 11, 0.3);
  background: rgba(245, 158, 11, 0.08);
}

.section-badge.pink {
  color: var(--color-pink);
  border-color: rgba(236, 72, 153, 0.3);
  background: rgba(236, 72, 153, 0.08);
}

.section-title {
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-sm);
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  max-width: 600px;
}

/* --- Responsive --- */
@media (max-width: 768px) {
  :root {
    font-size: 15px;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: rgba(6, 7, 13, 0.96);
    backdrop-filter: blur(16px);
    flex-direction: column;
    padding: var(--space-lg);
    gap: var(--space-md);
    border-bottom: 1px solid var(--color-border);
  }

  .nav-links.open {
    display: flex;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--space-sm);
    text-align: center;
  }

  .section-title {
    font-size: 1.6rem;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--space-md);
  }

  .section-title {
    font-size: 1.35rem;
  }
}