/* ============================================================
   HEADY DESIGN SYSTEM — Dark Glass Premium
   Shared across all 9 Heady domains
   Phi-scaled spacing · Sacred geometry motifs · OKLCH color
   ============================================================ */

/* --- Phi Constants -------------------------------------------*/
:root {
  --phi: 1.618033988749895;
  --phi-inv: 0.618033988749895;
  --phi-sm: 0.381966011250105;

  /* Type scale — fluid, phi-derived */
  --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);

  /* Phi-scaled spacing */
  --space-1:   0.25rem;   /*  4px */
  --space-2:   0.5rem;    /*  8px */
  --space-3:   0.75rem;   /* 12px */
  --space-4:   1rem;      /* 16px */
  --space-5:   1.25rem;   /* 20px */
  --space-6:   1.5rem;    /* 24px */
  --space-8:   2rem;      /* 32px */
  --space-10:  2.5rem;    /* 40px */
  --space-12:  3rem;      /* 48px */
  --space-16:  4rem;      /* 64px */
  --space-20:  5rem;      /* 80px */
  --space-24:  6rem;      /* 96px */
  --space-32:  8rem;      /* 128px */
  /* Phi-specific */
  --space-phi-1: calc(var(--space-4) * var(--phi));    /* ~26px */
  --space-phi-2: calc(var(--space-8) * var(--phi));    /* ~51px */
  --space-phi-3: calc(var(--space-12) * var(--phi));   /* ~77px */

  /* Radii */
  --radius-sm:   0.375rem;
  --radius-md:   0.5rem;
  --radius-lg:   0.875rem;
  --radius-xl:   1.25rem;
  --radius-2xl:  2rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast:        120ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);
  --transition-slow:        320ms cubic-bezier(0.16, 1, 0.3, 1);

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

  /* Fonts */
  --font-display: 'Space Grotesk', 'Inter', system-ui, sans-serif;
  --font-body:    'Inter', system-ui, sans-serif;
  --font-mono:    'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;
}

/* === DARK MODE (default — dark glass theme) === */
:root,
[data-theme="dark"] {
  /* Deep void backgrounds */
  --color-bg:              #09090f;
  --color-surface:         #0d0d14;
  --color-surface-2:       #111118;
  --color-surface-offset:  #13131b;
  --color-surface-offset-2:#17171f;
  --color-surface-dynamic: #1e1e28;
  --color-divider:         rgba(255,255,255,0.06);
  --color-border:          rgba(255,255,255,0.1);

  /* Glass surfaces */
  --glass-bg:    rgba(255,255,255,0.04);
  --glass-border:rgba(255,255,255,0.08);
  --glass-hover: rgba(255,255,255,0.07);
  --glass-blur:  blur(20px) saturate(180%);

  /* Text */
  --color-text:           #e8e8f0;
  --color-text-muted:     rgba(232,232,240,0.6);
  --color-text-faint:     rgba(232,232,240,0.35);
  --color-text-inverse:   #09090f;

  /* Accent (overridden per-site) */
  --color-accent:         #00d4aa;
  --color-accent-dark:    #00b891;
  --color-accent-glow:    rgba(0,212,170,0.15);
  --color-accent-muted:   rgba(0,212,170,0.08);

  /* Shadows */
  --shadow-sm:  0 1px 3px rgba(0,0,0,0.4);
  --shadow-md:  0 4px 16px rgba(0,0,0,0.5);
  --shadow-lg:  0 12px 48px rgba(0,0,0,0.6);
  --shadow-xl:  0 24px 80px rgba(0,0,0,0.7);
  --shadow-accent: 0 0 40px var(--color-accent-glow);

  /* Status */
  --color-success:  #10b981;
  --color-warning:  #f59e0b;
  --color-error:    #ef4444;
  --color-info:     #3b82f6;
}

/* === LIGHT MODE === */
[data-theme="light"] {
  --color-bg:              #f8f8fc;
  --color-surface:         #ffffff;
  --color-surface-2:       #f3f3f8;
  --color-surface-offset:  #ededf3;
  --color-surface-offset-2:#e8e8ee;
  --color-surface-dynamic: #dddde6;
  --color-divider:         rgba(0,0,0,0.08);
  --color-border:          rgba(0,0,0,0.12);

  --glass-bg:    rgba(255,255,255,0.8);
  --glass-border:rgba(0,0,0,0.1);
  --glass-hover: rgba(255,255,255,0.95);
  --glass-blur:  blur(20px) saturate(180%);

  --color-text:           #0f0f1a;
  --color-text-muted:     rgba(15,15,26,0.6);
  --color-text-faint:     rgba(15,15,26,0.35);
  --color-text-inverse:   #f8f8fc;

  --shadow-sm:  0 1px 3px rgba(0,0,0,0.08);
  --shadow-md:  0 4px 16px rgba(0,0,0,0.1);
  --shadow-lg:  0 12px 48px rgba(0,0,0,0.12);
  --shadow-xl:  0 24px 80px rgba(0,0,0,0.15);
}

/* System preference fallback */
@media (prefers-color-scheme: light) {
  :root:not([data-theme]) {
    --color-bg:              #f8f8fc;
    --color-surface:         #ffffff;
    --color-surface-2:       #f3f3f8;
    --color-surface-offset:  #ededf3;
    --color-surface-offset-2:#e8e8ee;
    --color-surface-dynamic: #dddde6;
    --color-divider:         rgba(0,0,0,0.08);
    --color-border:          rgba(0,0,0,0.12);
    --glass-bg:    rgba(255,255,255,0.8);
    --glass-border:rgba(0,0,0,0.1);
    --glass-hover: rgba(255,255,255,0.95);
    --color-text:           #0f0f1a;
    --color-text-muted:     rgba(15,15,26,0.6);
    --color-text-faint:     rgba(15,15,26,0.35);
    --color-text-inverse:   #f8f8fc;
    --shadow-sm:  0 1px 3px rgba(0,0,0,0.08);
    --shadow-md:  0 4px 16px rgba(0,0,0,0.1);
    --shadow-lg:  0 12px 48px rgba(0,0,0,0.12);
    --shadow-xl:  0 24px 80px rgba(0,0,0,0.15);
  }
}

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

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  scroll-padding-top: var(--space-20);
  hanging-punctuation: first last;
}

body {
  min-height: 100dvh;
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.65;
  color: var(--color-text);
  background-color: var(--color-bg);
  background-image:
    radial-gradient(ellipse 80% 50% at 50% -20%, var(--color-accent-glow), transparent),
    radial-gradient(ellipse 40% 30% at 80% 80%, rgba(139,92,246,0.05), transparent);
  overflow-x: hidden;
}

img, picture, video, canvas, svg { display: block; max-width: 100%; }
ul[role="list"], ol[role="list"] { list-style: none; }
input, button, textarea, select { font: inherit; color: inherit; }
h1, h2, h3, h4, h5, h6 { text-wrap: balance; line-height: 1.15; font-family: var(--font-display); }
p, li { text-wrap: pretty; }

::selection {
  background: var(--color-accent-muted);
  color: var(--color-text);
}
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}
button { cursor: pointer; background: none; border: none; }

/* ============================================================
   GLASS COMPONENTS
   ============================================================ */
.glass {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-radius: var(--radius-lg);
}
.glass:hover { background: var(--glass-hover); }

.glass-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  transition: transform var(--transition-interactive),
              box-shadow var(--transition-interactive),
              background var(--transition-interactive);
}
.glass-card:hover {
  transform: translateY(-3px);
  background: var(--glass-hover);
  box-shadow: var(--shadow-lg), 0 0 30px var(--color-accent-glow);
}

/* ============================================================
   NAVIGATION
   ============================================================ */
.heady-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  gap: var(--space-8);
  padding: var(--space-4) var(--space-8);
  background: rgba(9,9,15,0.7);
  backdrop-filter: blur(24px) saturate(200%);
  -webkit-backdrop-filter: blur(24px) saturate(200%);
  border-bottom: 1px solid var(--color-divider);
  transition: background var(--transition-slow);
}
[data-theme="light"] .heady-nav {
  background: rgba(248,248,252,0.8);
}
.heady-nav.scrolled {
  background: rgba(9,9,15,0.92);
  box-shadow: var(--shadow-md);
}
[data-theme="light"] .heady-nav.scrolled {
  background: rgba(248,248,252,0.95);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-text);
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  letter-spacing: -0.02em;
  flex-shrink: 0;
}
.nav-logo svg { width: 32px; height: 32px; }
.nav-logo .logo-accent { color: var(--color-accent); }

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  list-style: none;
  margin-left: auto;
}
.nav-links a {
  display: inline-flex;
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: color var(--transition-fast), background var(--transition-fast);
}
.nav-links a:hover {
  color: var(--color-text);
  background: var(--glass-bg);
}
.nav-links a.cta {
  color: var(--color-accent);
  border: 1px solid var(--color-accent);
  font-weight: 600;
}
.nav-links a.cta:hover {
  background: var(--color-accent-muted);
  color: var(--color-accent);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}

.nav-theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  transition: color var(--transition-fast), background var(--transition-fast);
}
.nav-theme-toggle:hover { color: var(--color-text); background: var(--glass-hover); }

.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 36px;
  height: 36px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  color: var(--color-text);
}
.nav-hamburger span {
  display: block;
  width: 18px;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}
.nav-hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; }
.nav-hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-hamburger { display: flex; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background: rgba(9,9,15,0.97);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-bottom: 1px solid var(--color-divider);
    padding: var(--space-6) var(--space-8);
    gap: var(--space-2);
    z-index: 999;
  }
  .nav-links.open a { font-size: var(--text-base); padding: var(--space-3) var(--space-4); }
}

/* ============================================================
   LAYOUT PRIMITIVES
   ============================================================ */
.container {
  width: 100%;
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-8);
}
.container-narrow { max-width: var(--content-default); }
.container-wide { max-width: 1440px; }

.section {
  padding-block: clamp(var(--space-16), 8vw, var(--space-32));
}
.section-sm { padding-block: clamp(var(--space-10), 5vw, var(--space-20)); }

.section-header {
  text-align: center;
  margin-bottom: clamp(var(--space-10), 5vw, var(--space-16));
}
.section-label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-4);
}
.section-label::before,
.section-label::after {
  content: '';
  display: block;
  width: 32px;
  height: 1px;
  background: var(--color-accent);
  opacity: 0.5;
}
.section-title {
  font-size: var(--text-2xl);
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--color-text);
  margin-bottom: var(--space-4);
}
.section-subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 56ch;
  margin-inline: auto;
}

/* Grid layouts */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-6); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-6); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-6); }
.grid-auto { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: var(--space-6); }

@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .grid-4, .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .container { padding-inline: var(--space-5); }
}

/* ============================================================
   HERO
   ============================================================ */
.heady-hero {
  position: relative;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding-top: 80px;
}

.hero-canvas {
  position: absolute;
  inset: 0;
  z-index: 0;
  opacity: 0.5;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 880px;
  padding: var(--space-8);
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: var(--color-accent-muted);
  border: 1px solid rgba(var(--accent-r,0),var(--accent-g,212),var(--accent-b,170),0.2);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-6);
}
.hero-badge-dot {
  width: 6px;
  height: 6px;
  background: var(--color-accent);
  border-radius: 50%;
  animation: pulse-dot 2s ease-in-out infinite;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.6; transform: scale(0.85); }
}

.hero-title {
  font-size: var(--text-hero);
  font-weight: 900;
  letter-spacing: -0.04em;
  line-height: 0.95;
  color: var(--color-text);
  margin-bottom: var(--space-6);
}
.hero-title .accent { color: var(--color-accent); }
.hero-title .gradient-text {
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-dark));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: var(--text-xl);
  color: var(--color-text-muted);
  line-height: 1.5;
  max-width: 60ch;
  margin-inline: auto;
  margin-bottom: var(--space-10);
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-12);
  margin-top: var(--space-16);
  padding-top: var(--space-12);
  border-top: 1px solid var(--color-divider);
}
@media (max-width: 640px) {
  .hero-stats { gap: var(--space-8); flex-wrap: wrap; }
}
.hero-stat { text-align: center; }
.hero-stat-value {
  display: block;
  font-size: var(--text-2xl);
  font-weight: 900;
  letter-spacing: -0.04em;
  color: var(--color-accent);
  font-family: var(--font-display);
  line-height: 1;
}
.hero-stat-label {
  display: block;
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-text-faint);
  margin-top: var(--space-1);
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-size: var(--text-sm);
  font-weight: 600;
  border-radius: var(--radius-full);
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: transform var(--transition-fast),
              box-shadow var(--transition-fast),
              background var(--transition-fast),
              opacity var(--transition-fast);
  white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn-primary {
  background: var(--color-accent);
  color: #000;
  box-shadow: 0 0 24px var(--color-accent-glow);
}
.btn-primary:hover {
  background: var(--color-accent-dark);
  box-shadow: 0 0 40px var(--color-accent-glow);
}

.btn-ghost {
  background: var(--glass-bg);
  color: var(--color-text);
  border: 1px solid var(--glass-border);
  backdrop-filter: blur(12px);
}
.btn-ghost:hover { background: var(--glass-hover); color: var(--color-text); }

.btn-outline-accent {
  background: transparent;
  color: var(--color-accent);
  border: 1px solid var(--color-accent);
}
.btn-outline-accent:hover { background: var(--color-accent-muted); }

.btn-lg {
  padding: var(--space-4) var(--space-10);
  font-size: var(--text-base);
  border-radius: var(--radius-full);
}
.btn-sm { padding: var(--space-2) var(--space-4); font-size: var(--text-xs); }

/* ============================================================
   FEATURE CARDS
   ============================================================ */
.feature-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  transition: transform var(--transition-interactive),
              box-shadow var(--transition-interactive),
              background var(--transition-interactive),
              border-color var(--transition-interactive);
  position: relative;
  overflow: hidden;
}
.feature-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at top left, var(--color-accent-glow), transparent 70%);
  opacity: 0;
  transition: opacity var(--transition-interactive);
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg), 0 0 40px var(--color-accent-glow);
  border-color: rgba(var(--accent-r,0),var(--accent-g,212),var(--accent-b,170),0.3);
}
.feature-card:hover::before { opacity: 1; }

.feature-icon {
  font-size: 2rem;
  margin-bottom: var(--space-4);
  display: block;
}
.feature-icon-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: var(--color-accent-muted);
  border: 1px solid rgba(var(--accent-r,0),var(--accent-g,212),var(--accent-b,170),0.2);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-4);
  color: var(--color-accent);
}
.feature-title {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-3);
  font-family: var(--font-display);
}
.feature-desc {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ============================================================
   STATS STRIP
   ============================================================ */
.stats-strip {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-2xl);
  padding: var(--space-10) var(--space-8);
  display: grid;
  gap: var(--space-6);
  text-align: center;
}
.stat-value {
  font-size: var(--text-3xl);
  font-weight: 900;
  letter-spacing: -0.04em;
  color: var(--color-accent);
  font-family: var(--font-display);
  line-height: 1;
}
.stat-label {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-muted);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  margin-top: var(--space-2);
}
.stat-desc {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  margin-top: var(--space-1);
}

/* ============================================================
   TECH STACK BADGES
   ============================================================ */
.tech-stack {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-3);
}
.tech-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text-muted);
  transition: color var(--transition-fast), border-color var(--transition-fast);
}
.tech-badge:hover { color: var(--color-accent); border-color: var(--color-accent); }
.tech-badge-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
}

/* ============================================================
   DEEP DIVE / CONTENT SECTION
   ============================================================ */
.deep-dive {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
}
@media (max-width: 768px) {
  .deep-dive { grid-template-columns: 1fr; gap: var(--space-8); }
}
.deep-dive-content h3 {
  font-size: var(--text-xl);
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-5);
  color: var(--color-text);
}
.deep-dive-content p {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.75;
  margin-bottom: var(--space-4);
}
.deep-dive-visual {
  position: relative;
  border-radius: var(--radius-2xl);
  overflow: hidden;
  aspect-ratio: 4/3;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  display: flex;
  align-items: center;
  justify-content: center;
}

/* ============================================================
   HOW IT WORKS
   ============================================================ */
.steps-list {
  display: grid;
  gap: var(--space-6);
  counter-reset: steps;
}
.step-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-6);
  align-items: start;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: var(--space-6);
  transition: background var(--transition-fast);
}
.step-item:hover { background: var(--glass-hover); }
.step-number {
  counter-increment: steps;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-full);
  background: var(--color-accent-muted);
  border: 1px solid rgba(var(--accent-r,0),var(--accent-g,212),var(--accent-b,170),0.25);
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 800;
  color: var(--color-accent);
  flex-shrink: 0;
}
.step-title { font-size: var(--text-lg); font-weight: 700; color: var(--color-text); margin-bottom: var(--space-2); }
.step-desc { font-size: var(--text-base); color: var(--color-text-muted); line-height: 1.6; }

/* ============================================================
   ECOSYSTEM MAP
   ============================================================ */
.ecosystem-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: var(--space-4);
}
.ecosystem-node {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: var(--space-5) var(--space-4);
  text-align: center;
  text-decoration: none;
  display: block;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
}
.ecosystem-node:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md), 0 0 20px var(--color-accent-glow);
  border-color: var(--color-accent);
}
.ecosystem-node-icon { font-size: 1.75rem; margin-bottom: var(--space-3); display: block; }
.ecosystem-node-name { font-size: var(--text-sm); font-weight: 700; color: var(--color-text); display: block; }
.ecosystem-node-role { font-size: var(--text-xs); color: var(--color-text-faint); margin-top: var(--space-1); display: block; }

/* ============================================================
   USE CASES
   ============================================================ */
.use-case-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--space-6);
}
.use-case-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: var(--space-8);
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-interactive), box-shadow var(--transition-interactive);
}
.use-case-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.use-case-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent), transparent);
}
.use-case-label { font-size: var(--text-xs); font-weight: 700; text-transform: uppercase; letter-spacing: 0.1em; color: var(--color-accent); margin-bottom: var(--space-3); }
.use-case-title { font-size: var(--text-lg); font-weight: 700; color: var(--color-text); margin-bottom: var(--space-3); }
.use-case-desc { font-size: var(--text-base); color: var(--color-text-muted); line-height: 1.6; }

/* ============================================================
   FAQ
   ============================================================ */
.faq-list { display: grid; gap: var(--space-4); }
.faq-item {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
}
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-6) var(--space-8);
  cursor: pointer;
  gap: var(--space-4);
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-text);
  transition: color var(--transition-fast), background var(--transition-fast);
}
.faq-question:hover { background: var(--glass-hover); color: var(--color-accent); }
.faq-chevron {
  width: 20px;
  height: 20px;
  flex-shrink: 0;
  color: var(--color-text-muted);
  transition: transform var(--transition-interactive);
}
.faq-item.open .faq-chevron { transform: rotate(180deg); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-slow);
}
.faq-item.open .faq-answer { max-height: 400px; }
.faq-answer p {
  padding: var(--space-2) var(--space-8) var(--space-6);
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.7;
  border-top: 1px solid var(--color-divider);
}

/* ============================================================
   CTA SECTION
   ============================================================ */
.cta-section {
  position: relative;
  overflow: hidden;
  text-align: center;
  border-radius: var(--radius-2xl);
  padding: clamp(var(--space-16), 8vw, var(--space-32)) var(--space-8);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, var(--color-accent-glow), transparent 70%);
}
.cta-title { font-size: var(--text-2xl); font-weight: 900; letter-spacing: -0.03em; margin-bottom: var(--space-4); position: relative; z-index: 1; }
.cta-subtitle { font-size: var(--text-lg); color: var(--color-text-muted); margin-bottom: var(--space-10); max-width: 48ch; margin-inline: auto; margin-bottom: var(--space-10); position: relative; z-index: 1; }
.cta-actions { display: flex; gap: var(--space-4); justify-content: center; flex-wrap: wrap; position: relative; z-index: 1; }

/* ============================================================
   FOOTER
   ============================================================ */
.heady-footer {
  border-top: 1px solid var(--color-divider);
  padding-top: var(--space-16);
  padding-bottom: var(--space-8);
  margin-top: var(--space-32);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: var(--space-12);
  padding-bottom: var(--space-12);
  border-bottom: 1px solid var(--color-divider);
}
@media (max-width: 768px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--space-8); }
}
@media (max-width: 480px) {
  .footer-grid { grid-template-columns: 1fr; }
}
.footer-brand { display: flex; flex-direction: column; gap: var(--space-4); }
.footer-tagline { font-size: var(--text-sm); color: var(--color-text-muted); line-height: 1.6; max-width: 32ch; }
.footer-col-title { font-size: var(--text-xs); font-weight: 700; letter-spacing: 0.12em; text-transform: uppercase; color: var(--color-text-faint); margin-bottom: var(--space-4); }
.footer-col ul { list-style: none; display: flex; flex-direction: column; gap: var(--space-3); }
.footer-col a { font-size: var(--text-sm); color: var(--color-text-muted); text-decoration: none; transition: color var(--transition-fast); }
.footer-col a:hover { color: var(--color-accent); }
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-8);
  flex-wrap: wrap;
  gap: var(--space-4);
}
.footer-copy { font-size: var(--text-xs); color: var(--color-text-faint); }
.footer-cross-nav { display: flex; flex-wrap: wrap; gap: var(--space-3); }
.footer-cross-nav a { font-size: var(--text-xs); color: var(--color-text-faint); text-decoration: none; transition: color var(--transition-fast); }
.footer-cross-nav a:hover { color: var(--color-accent); }

/* ============================================================
   AUTH WIDGET (inline)
   ============================================================ */
.auth-widget {
  position: fixed;
  top: var(--space-4);
  right: var(--space-4);
  z-index: 1001;
  display: none;
}
.auth-widget-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text-muted);
  cursor: pointer;
  backdrop-filter: blur(12px);
  transition: all var(--transition-fast);
}
.auth-widget-btn:hover { color: var(--color-text); border-color: var(--color-accent); }
.auth-widget-btn .dot {
  width: 6px; height: 6px;
  background: var(--color-error);
  border-radius: 50%;
}
.auth-widget-btn .dot.online { background: var(--color-success); }

/* ============================================================
   SCROLL ANIMATIONS
   ============================================================ */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}
.fade-in-delay-1 { transition-delay: 0.1s; }
.fade-in-delay-2 { transition-delay: 0.2s; }
.fade-in-delay-3 { transition-delay: 0.3s; }
.fade-in-delay-4 { transition-delay: 0.4s; }

/* ============================================================
   UTILITIES
   ============================================================ */
.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border-width: 0;
}
.text-accent { color: var(--color-accent); }
.text-muted { color: var(--color-text-muted); }
.text-faint { color: var(--color-text-faint); }
.text-center { text-align: center; }
.mono { font-family: var(--font-mono); }
.divider { height: 1px; background: var(--color-divider); margin-block: var(--space-8); }

/* Accent glow line */
.accent-line {
  display: inline-block;
  width: 60px;
  height: 3px;
  background: var(--color-accent);
  border-radius: var(--radius-full);
  box-shadow: 0 0 12px var(--color-accent-glow);
}

/* Scrollbar */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--color-bg); }
::-webkit-scrollbar-thumb { background: var(--color-border); border-radius: var(--radius-full); }
::-webkit-scrollbar-thumb:hover { background: var(--color-accent); }