/* ============================================
   ZeroX — Design Tokens & Components
   Brand: Dark, technical, precision-engineered
   Accent: Electric Cyan (#00E5FF) 
   ============================================ */

/* --- Type Scale (Fluid) --- */
:root {
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem    + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1.2rem  + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);
  --text-3xl:  clamp(2.5rem,   1rem    + 4vw,    5rem);
  --text-hero: clamp(3rem,     0.5rem  + 7vw,    8rem);
}

/* --- Spacing (4px base) --- */
:root {
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;
}

/* --- ZeroX Brand Colors --- */
/* Dark-first design. Primary accent: electric cyan. */
:root, [data-theme="dark"] {
  --color-bg:             #0a0a0c;
  --color-surface:        #111114;
  --color-surface-2:      #18181c;
  --color-surface-offset: #1e1e24;
  --color-border:         #2a2a32;
  --color-divider:        #222228;

  --color-text:           #e8e8ec;
  --color-text-muted:     #8a8a96;
  --color-text-faint:     #4e4e5a;
  --color-text-inverse:   #0a0a0c;

  --color-primary:        #00E5FF;
  --color-primary-hover:  #00B8D4;
  --color-primary-active: #0097A7;
  --color-primary-glow:   rgba(0, 229, 255, 0.15);

  --color-accent-2:       #7C4DFF;
  --color-accent-2-glow:  rgba(124, 77, 255, 0.12);

  --color-error:          #FF5252;
  --color-success:        #69F0AE;
  --color-warning:        #FFD740;

  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-2xl: 1.5rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.5);
  --shadow-glow: 0 0 40px rgba(0, 229, 255, 0.1);

  /* Content widths */
  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;
  --content-full: 100%;

  /* Fonts */
  --font-display: 'Cabinet Grotesk', 'Helvetica Neue', sans-serif;
  --font-body: 'Satoshi', 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', 'Consolas', monospace;
}

/* Light mode override */
[data-theme="light"] {
  --color-bg:             #f4f4f6;
  --color-surface:        #ffffff;
  --color-surface-2:      #f8f8fa;
  --color-surface-offset: #eeeef2;
  --color-border:         #d4d4dc;
  --color-divider:        #e2e2e8;

  --color-text:           #111118;
  --color-text-muted:     #5a5a68;
  --color-text-faint:     #9a9aaa;
  --color-text-inverse:   #f4f4f6;

  --color-primary:        #0097A7;
  --color-primary-hover:  #00838F;
  --color-primary-active: #006064;
  --color-primary-glow:   rgba(0, 151, 167, 0.1);

  --color-accent-2:       #651FFF;
  --color-accent-2-glow:  rgba(101, 31, 255, 0.08);

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.12);
  --shadow-glow: 0 0 40px rgba(0, 151, 167, 0.08);
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme]) {
    --color-bg:             #f4f4f6;
    --color-surface:        #ffffff;
    --color-surface-2:      #f8f8fa;
    --color-surface-offset: #eeeef2;
    --color-border:         #d4d4dc;
    --color-divider:        #e2e2e8;
    --color-text:           #111118;
    --color-text-muted:     #5a5a68;
    --color-text-faint:     #9a9aaa;
    --color-text-inverse:   #f4f4f6;
    --color-primary:        #0097A7;
    --color-primary-hover:  #00838F;
    --color-primary-active: #006064;
    --color-primary-glow:   rgba(0, 151, 167, 0.1);
    --color-accent-2:       #651FFF;
    --color-accent-2-glow:  rgba(101, 31, 255, 0.08);
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
    --shadow-lg: 0 12px 32px rgba(0,0,0,0.12);
    --shadow-glow: 0 0 40px rgba(0, 151, 167, 0.08);
  }
}

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

/* --- Header / Nav --- */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: oklch(from var(--color-bg) l c h / 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow 0.3s var(--ease-out);
}
.header--scrolled {
  box-shadow: var(--shadow-md);
}
.header-inner {
  max-width: var(--content-wide);
  margin-inline: auto;
  padding: var(--space-4) var(--space-4);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  color: var(--color-text);
}
.logo-text {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  letter-spacing: -0.02em;
}
.logo-text span {
  color: var(--color-primary);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  list-style: none;
}
.nav-links a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition-interactive);
}
.nav-links a:hover {
  color: var(--color-primary);
}
.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

/* --- Theme Toggle --- */
.theme-toggle {
  padding: var(--space-2);
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  transition: color var(--transition-interactive), background var(--transition-interactive);
}
.theme-toggle:hover {
  color: var(--color-text);
  background: var(--color-surface-offset);
}

/* --- Mobile Nav --- */
.mobile-toggle {
  display: none;
  padding: var(--space-2);
  color: var(--color-text);
}
@media (max-width: 768px) {
  .nav-links { display: none; }
  .mobile-toggle { display: block; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-4);
    gap: var(--space-4);
  }
}

/* --- Hero --- */
.hero {
  position: relative;
  overflow: hidden;
  padding: clamp(var(--space-16), 10vw, var(--space-32)) var(--space-4);
  min-height: 80vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.hero-bg canvas {
  width: 100%;
  height: 100%;
}
.hero-content {
  position: relative;
  z-index: 1;
  max-width: 860px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-1) var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  margin-bottom: var(--space-6);
  background: var(--color-surface);
}
.hero-badge .dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-primary);
  animation: pulse-dot 2s ease-in-out infinite;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(0,229,255,0.4); }
  50% { opacity: 0.8; box-shadow: 0 0 0 6px rgba(0,229,255,0); }
}
.hero h1 {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin-bottom: var(--space-6);
}
.hero h1 .gradient-text {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero p {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 560px;
  margin-inline: auto;
  margin-bottom: var(--space-8);
  line-height: 1.6;
}
.hero-ctas {
  display: flex;
  gap: var(--space-4);
  justify-content: center;
  flex-wrap: wrap;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-lg);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-interactive);
  border: 1px solid transparent;
}
.btn-primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
  box-shadow: 0 0 20px var(--color-primary-glow);
}
.btn-primary:hover {
  background: var(--color-primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 0 30px var(--color-primary-glow), var(--shadow-md);
}
.btn-primary:active {
  transform: translateY(0);
}
.btn-ghost {
  border-color: var(--color-border);
  color: var(--color-text);
  background: transparent;
}
.btn-ghost:hover {
  border-color: var(--color-text-muted);
  background: var(--color-surface);
  transform: translateY(-1px);
}
.btn-ghost:active {
  transform: translateY(0);
}

/* --- Section Base --- */
.section {
  padding: clamp(var(--space-12), 8vw, var(--space-24)) var(--space-4);
}
.section-inner {
  max-width: var(--content-wide);
  margin-inline: auto;
}
.section-header {
  text-align: center;
  margin-bottom: clamp(var(--space-8), 4vw, var(--space-16));
}
.section-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-3);
}
.section-title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  letter-spacing: -0.02em;
}
.section-desc {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 560px;
  margin-inline: auto;
  margin-top: var(--space-4);
}

/* --- Products Grid --- */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(340px, 100%), 1fr));
  gap: var(--space-6);
}
.product-card {
  position: relative;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  transition: all var(--transition-interactive);
  overflow: hidden;
}
.product-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent-2));
  opacity: 0;
  transition: opacity var(--transition-interactive);
}
.product-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-glow);
  transform: translateY(-2px);
}
.product-card:hover::before {
  opacity: 1;
}
.product-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-lg);
  background: var(--color-primary-glow);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-6);
  color: var(--color-primary);
}
.product-card h3 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  margin-bottom: var(--space-3);
}
.product-card p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}
.product-tag {
  display: inline-block;
  margin-top: var(--space-4);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 500;
  background: var(--color-primary-glow);
  color: var(--color-primary);
}
.product-tag.coming-soon {
  background: var(--color-accent-2-glow);
  color: var(--color-accent-2);
}

/* --- Featured Product (LuminaPlayer) --- */
.featured-product {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-2xl);
  overflow: hidden;
}
.featured-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
}
@media (max-width: 768px) {
  .featured-inner {
    grid-template-columns: 1fr;
  }
}
.featured-info {
  padding: clamp(var(--space-8), 4vw, var(--space-12));
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.featured-info h3 {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  margin-bottom: var(--space-4);
}
.featured-info p {
  color: var(--color-text-muted);
  margin-bottom: var(--space-6);
  line-height: 1.7;
}
.feature-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-bottom: var(--space-8);
}
.feature-list li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}
.feature-list li svg {
  flex-shrink: 0;
  width: 18px;
  height: 18px;
  color: var(--color-primary);
  margin-top: 2px;
}
.featured-visual {
  position: relative;
  background: linear-gradient(135deg, var(--color-surface-2), var(--color-surface));
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 400px;
  overflow: hidden;
}
.player-mockup {
  width: 85%;
  border-radius: var(--radius-lg);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.player-titlebar {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}
.player-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}
.player-dot.red { background: #FF5F57; }
.player-dot.yellow { background: #FFBD2E; }
.player-dot.green { background: #28CA41; }
.player-titlebar-text {
  flex: 1;
  text-align: center;
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  font-family: var(--font-mono);
}
.player-body {
  aspect-ratio: 16/10;
  background: linear-gradient(135deg, #0d1117, #161b22);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
}
.player-body svg {
  color: var(--color-primary);
  opacity: 0.5;
}
.player-subtitle {
  position: absolute;
  bottom: 12%;
  background: rgba(0,0,0,0.75);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  color: #fff;
  font-family: var(--font-mono);
}
.player-controls {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
}
.player-progress {
  flex: 1;
  height: 3px;
  background: var(--color-border);
  border-radius: var(--radius-full);
  position: relative;
  overflow: hidden;
}
.player-progress-fill {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 35%;
  background: var(--color-primary);
  border-radius: var(--radius-full);
}
.player-time {
  font-size: 11px;
  color: var(--color-text-faint);
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

/* --- Capabilities --- */
.capabilities-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}
@media (max-width: 768px) {
  .capabilities-grid {
    grid-template-columns: 1fr;
  }
}
.capability-card {
  padding: var(--space-6);
  border-radius: var(--radius-xl);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  transition: all var(--transition-interactive);
}
.capability-card:hover {
  border-color: var(--color-text-faint);
  box-shadow: var(--shadow-md);
}
.capability-num {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}
.capability-card h3 {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 600;
  margin-bottom: var(--space-2);
}
.capability-card p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* --- About / Philosophy --- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(var(--space-8), 4vw, var(--space-16));
  align-items: center;
}
@media (max-width: 768px) {
  .about-grid {
    grid-template-columns: 1fr;
  }
}
.about-text h2 {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-6);
}
.about-text p {
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
  line-height: 1.7;
}
.about-visual {
  position: relative;
}
.stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}
.stat-card {
  padding: var(--space-6);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  text-align: center;
}
.stat-value {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: var(--space-1);
}
.stat-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

/* --- Tech Stack --- */
.tech-row {
  display: flex;
  gap: var(--space-3);
  flex-wrap: wrap;
  justify-content: center;
}
.tech-pill {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  transition: all var(--transition-interactive);
}
.tech-pill:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: var(--color-primary-glow);
}

/* --- CTA Section --- */
.cta-section {
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--color-primary-glow), transparent 70%);
  pointer-events: none;
}
.cta-content {
  position: relative;
  z-index: 1;
}
.cta-section h2 {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  margin-bottom: var(--space-4);
}
.cta-section p {
  color: var(--color-text-muted);
  max-width: 480px;
  margin-inline: auto;
  margin-bottom: var(--space-8);
}

/* --- Footer --- */
.footer {
  padding: var(--space-12) var(--space-4) var(--space-8);
  border-top: 1px solid var(--color-border);
}
.footer-inner {
  max-width: var(--content-wide);
  margin-inline: auto;
}
.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-8);
  margin-bottom: var(--space-12);
}
@media (max-width: 768px) {
  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-6);
  }
}
.footer-brand p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-4);
  max-width: 280px;
  line-height: 1.6;
}
.footer-col h4 {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 600;
  margin-bottom: var(--space-4);
  color: var(--color-text);
}
.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.footer-col a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-interactive);
}
.footer-col a:hover {
  color: var(--color-primary);
}
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-border);
  flex-wrap: wrap;
  gap: var(--space-4);
}
.footer-bottom p, .footer-bottom a {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}
.footer-bottom a {
  text-decoration: none;
  transition: color var(--transition-interactive);
}
.footer-bottom a:hover {
  color: var(--color-primary);
}

/* --- Scroll Animations (JS-driven for broad support) --- */
.fade-in {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1), transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Grid Background Pattern --- */
.grid-pattern {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--color-border) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-border) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 60% 50% at 50% 50%, black, transparent);
  -webkit-mask-image: radial-gradient(ellipse 60% 50% at 50% 50%, black, transparent);
  opacity: 0.3;
  pointer-events: none;
}