/* ==========================================================================
   Sloxia — Apple-grade minimalist design system
   Semantic HTML5 · Modern CSS3 · Vanilla JS
   Light theme (default) · Dark theme via [data-theme="dark"]
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Design tokens
   -------------------------------------------------------------------------- */
:root {
  /* Brand accents — shared by both themes */
  --color1: #0a84ff;                     /* Primary Electric Blue */
  --color2: #bf5af2;                     /* Accent Purple */
  --color3: #f4533a;                     /* High-Impact Coral */

  /* ---- LIGHT THEME (default) ---- */
  --bg-base: #ffffff;
  --bg-surface: #f5f5f7;
  --text-primary: #1d1d1f;
  --text-secondary: #6e6e73;
  --text-body: #48484a;
  --border-subtle: rgba(0, 0, 0, 0.10);
  --border-strong: rgba(0, 0, 0, 0.18);
  --border-active: rgba(10, 132, 255, 0.35);
  --glass-bg: rgba(255, 255, 255, 0.72);
  --glass-blur: blur(20px);

  --card-grad-a: rgba(255, 255, 255, 0.92);
  --card-grad-b: rgba(255, 255, 255, 0.55);
  --section-alt-a: rgba(0, 0, 0, 0.02);
  --btn-ghost-bg: rgba(0, 0, 0, 0.04);
  --btn-ghost-hover: rgba(0, 0, 0, 0.08);
  --nav-hover-bg: rgba(0, 0, 0, 0.05);
  --nav-active-bg: rgba(0, 0, 0, 0.08);
  --chip-bg: rgba(0, 0, 0, 0.04);
  --icon-bg: rgba(0, 0, 0, 0.05);
  --icon-border: rgba(0, 0, 0, 0.14);
  --resolver-bg: rgba(0, 0, 0, 0.025);
  --table-head-bg: rgba(0, 0, 0, 0.04);
  --table-hover: rgba(0, 0, 0, 0.03);
  --col-highlight: rgba(10, 132, 255, 0.06);
  --callout-fade: rgba(0, 0, 0, 0.01);
  --cta-a: rgba(10, 132, 255, 0.08);
  --cta-b: rgba(191, 90, 242, 0.06);
  --footer-grad: rgba(0, 0, 0, 0.02);
  --drawer-bg: rgba(255, 255, 255, 0.95);
  --hero-dots: rgba(0, 0, 0, 0.10);
  --ambient-a: rgba(10, 132, 255, 0.05);
  --ambient-b: rgba(191, 90, 242, 0.045);
  --ambient-c: rgba(244, 83, 58, 0.03);
  --flow-glow-1: rgba(10, 132, 255, 0.55);
  --flow-glow-2: rgba(191, 90, 242, 0.55);
  --flow-glow-3: rgba(244, 83, 58, 0.55);
  --scrollbar-thumb: rgba(0, 0, 0, 0.22);
  --shadow-card: 0 24px 64px rgba(0, 0, 0, 0.08);
  --shadow-lift: 0 20px 48px rgba(0, 0, 0, 0.12);
  --header-shadow: 0 12px 32px rgba(0, 0, 0, 0.07);
  --glow-blue: 0 12px 48px rgba(10, 132, 255, 0.16);
  --glow-purple: 0 12px 48px rgba(191, 90, 242, 0.15);
  --glow-coral: 0 12px 48px rgba(244, 83, 58, 0.15);

  --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text",
               Inter, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-mono: "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;

  --maxw: 1160px;
  --gutter: 24px;
  --header-h: 64px;

  --radius-xl: 28px;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --motion-fast: 160ms;
  --motion-base: 240ms;
  --motion-card: 320ms;
  --motion-enter: 560ms;
  --motion-drawer: 350ms;
}

/* ---- DARK THEME ---- */
:root[data-theme="dark"] {
  --bg-base: #000000;
  --bg-surface: #0a0a0c;
  --text-primary: #f5f5f7;
  --text-secondary: #86868b;
  --text-body: #a1a1a6;
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.16);
  --border-active: rgba(10, 132, 255, 0.35);
  --glass-bg: rgba(18, 18, 20, 0.75);

  --card-grad-a: rgba(255, 255, 255, 0.045);
  --card-grad-b: rgba(255, 255, 255, 0.014);
  --section-alt-a: rgba(255, 255, 255, 0.015);
  --btn-ghost-bg: rgba(255, 255, 255, 0.04);
  --btn-ghost-hover: rgba(255, 255, 255, 0.08);
  --nav-hover-bg: rgba(255, 255, 255, 0.06);
  --nav-active-bg: rgba(255, 255, 255, 0.09);
  --chip-bg: rgba(255, 255, 255, 0.03);
  --icon-bg: rgba(255, 255, 255, 0.06);
  --icon-border: rgba(255, 255, 255, 0.14);
  --resolver-bg: rgba(255, 255, 255, 0.02);
  --table-head-bg: rgba(255, 255, 255, 0.02);
  --table-hover: rgba(255, 255, 255, 0.02);
  --col-highlight: rgba(10, 132, 255, 0.045);
  --callout-fade: rgba(255, 255, 255, 0.015);
  --cta-a: rgba(10, 132, 255, 0.12);
  --cta-b: rgba(191, 90, 242, 0.10);
  --footer-grad: rgba(255, 255, 255, 0.012);
  --drawer-bg: rgba(0, 0, 0, 0.94);
  --hero-dots: rgba(255, 255, 255, 0.06);
  --ambient-a: rgba(10, 132, 255, 0.10);
  --ambient-b: rgba(191, 90, 242, 0.08);
  --ambient-c: rgba(244, 83, 58, 0.05);
  --flow-glow-1: rgba(10, 132, 255, 0.80);
  --flow-glow-2: rgba(191, 90, 242, 0.80);
  --flow-glow-3: rgba(244, 83, 58, 0.80);
  --scrollbar-thumb: rgba(255, 255, 255, 0.14);
  --shadow-card: 0 24px 64px rgba(0, 0, 0, 0.5);
  --shadow-lift: 0 20px 48px rgba(0, 0, 0, 0.55);
  --header-shadow: 0 12px 32px rgba(0, 0, 0, 0.35);
  --glow-blue: 0 12px 48px rgba(10, 132, 255, 0.22);
  --glow-purple: 0 12px 48px rgba(191, 90, 242, 0.2);
  --glow-coral: 0 12px 48px rgba(244, 83, 58, 0.2);
}

/* Auto-follow the OS only when no explicit choice has been made
   (the markup always ships data-theme="light", so this is a safe fallback) */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]):not([data-theme="dark"]) {
    --bg-base: #000000;
    --bg-surface: #0a0a0c;
    --text-primary: #f5f5f7;
    --text-secondary: #86868b;
    --text-body: #a1a1a6;
    --border-subtle: rgba(255, 255, 255, 0.08);
    --border-strong: rgba(255, 255, 255, 0.16);
    --glass-bg: rgba(18, 18, 20, 0.75);
    --card-grad-a: rgba(255, 255, 255, 0.045);
    --card-grad-b: rgba(255, 255, 255, 0.014);
    --section-alt-a: rgba(255, 255, 255, 0.015);
    --btn-ghost-bg: rgba(255, 255, 255, 0.04);
    --btn-ghost-hover: rgba(255, 255, 255, 0.08);
    --nav-hover-bg: rgba(255, 255, 255, 0.06);
    --nav-active-bg: rgba(255, 255, 255, 0.09);
    --chip-bg: rgba(255, 255, 255, 0.03);
    --icon-bg: rgba(255, 255, 255, 0.06);
    --icon-border: rgba(255, 255, 255, 0.14);
    --resolver-bg: rgba(255, 255, 255, 0.02);
    --table-head-bg: rgba(255, 255, 255, 0.02);
    --table-hover: rgba(255, 255, 255, 0.02);
    --col-highlight: rgba(10, 132, 255, 0.045);
    --callout-fade: rgba(255, 255, 255, 0.015);
    --cta-a: rgba(10, 132, 255, 0.12);
    --cta-b: rgba(191, 90, 242, 0.10);
    --footer-grad: rgba(255, 255, 255, 0.012);
    --drawer-bg: rgba(0, 0, 0, 0.94);
    --hero-dots: rgba(255, 255, 255, 0.06);
    --ambient-a: rgba(10, 132, 255, 0.10);
    --ambient-b: rgba(191, 90, 242, 0.08);
    --ambient-c: rgba(244, 83, 58, 0.05);
    --flow-glow-1: rgba(10, 132, 255, 0.80);
    --flow-glow-2: rgba(191, 90, 242, 0.80);
    --flow-glow-3: rgba(244, 83, 58, 0.80);
    --scrollbar-thumb: rgba(255, 255, 255, 0.14);
    --shadow-card: 0 24px 64px rgba(0, 0, 0, 0.5);
    --shadow-lift: 0 20px 48px rgba(0, 0, 0, 0.55);
    --header-shadow: 0 12px 32px rgba(0, 0, 0, 0.35);
    --glow-blue: 0 12px 48px rgba(10, 132, 255, 0.22);
    --glow-purple: 0 12px 48px rgba(191, 90, 242, 0.2);
    --glow-coral: 0 12px 48px rgba(244, 83, 58, 0.2);
  }
}

/* --------------------------------------------------------------------------
   2. Reset & base
   -------------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

[hidden] { display: none !important; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  scroll-padding-top: calc(var(--header-h) + 24px);
  color-scheme: light;
}
html[data-theme="dark"] { color-scheme: dark; }

body {
  background: var(--bg-base);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  transition: background var(--motion-card) var(--ease), color var(--motion-card) var(--ease);
}

/* Ambient atmosphere behind the whole page */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(1000px 560px at 12% -8%, var(--ambient-a), transparent 62%),
    radial-gradient(900px 520px at 92% 8%, var(--ambient-b), transparent 60%),
    radial-gradient(760px 480px at 50% 115%, var(--ambient-c), transparent 62%);
  pointer-events: none;
  transition: background var(--motion-card) var(--ease);
}

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

a { color: var(--color1); }

::selection { background: rgba(10, 132, 255, 0.35); color: #fff; }

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: var(--scrollbar-thumb);
  border-radius: 8px;
  border: 2px solid var(--bg-base);
}

:focus-visible {
  outline: 2px solid var(--color1);
  outline-offset: 3px;
  border-radius: 4px;
}

.no-scroll { overflow: hidden; }

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 200;
  padding: 10px 18px;
  border-radius: 999px;
  background: var(--color1);
  color: #fff;
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  transform: translateY(-200%);
  transition: transform var(--motion-base) var(--ease);
}
.skip-link:focus { transform: none; }

/* --------------------------------------------------------------------------
   3. Typography
   -------------------------------------------------------------------------- */
h1, h2, h3, h4 {
  color: var(--text-primary);
  font-weight: 700;
  text-wrap: balance;
}
h1, h2 { letter-spacing: -0.04em; line-height: 1.05; }
h3, h4 { letter-spacing: -0.025em; line-height: 1.2; }

h1 { font-size: clamp(2.7rem, 7vw, 4.8rem); }
h2 { font-size: clamp(2rem, 4.4vw, 3rem); }
h3 { font-size: 1.22rem; letter-spacing: -0.02em; line-height: 1.3; }
h4 { font-size: 1.02rem; letter-spacing: -0.015em; }

p { color: var(--text-body); }

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--color1);
  margin-bottom: 18px;
}
.kicker::before {
  content: "";
  width: 26px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color1));
}
.kicker--purple { color: var(--color2); }
.kicker--purple::before { background: linear-gradient(90deg, transparent, var(--color2)); }
.kicker--coral { color: var(--color3); }
.kicker--coral::before { background: linear-gradient(90deg, transparent, var(--color3)); }

.lede {
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  color: var(--text-body);
  max-width: 46em;
}

.muted { color: var(--text-secondary); }
.mono {
  font-family: var(--font-mono);
  font-size: 0.85em;
}

.quote {
  border-left: 2px solid var(--color2);
  padding: 8px 0 8px 24px;
  font-size: 1.15rem;
  color: var(--text-primary);
  letter-spacing: -0.01em;
  line-height: 1.5;
}
.quote cite {
  display: block;
  margin-top: 12px;
  font-style: normal;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

/* --------------------------------------------------------------------------
   4. Layout primitives
   -------------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: clamp(72px, 10vw, 120px); position: relative; }
.section--tight { padding-block: clamp(56px, 7vw, 88px); }

.section-alt {
  background: linear-gradient(180deg, transparent,
              var(--section-alt-a) 18%,
              var(--section-alt-a) 82%, transparent);
}

.section-head { max-width: 46em; margin-bottom: clamp(40px, 6vw, 64px); }
.section-head > .lede { margin-top: 16px; }
.section-head--center { margin-inline: auto; text-align: center; }

.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.grid-5 { display: grid; grid-template-columns: repeat(5, 1fr); gap: 16px; }

/* --------------------------------------------------------------------------
   5. Header
   -------------------------------------------------------------------------- */
.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  border-bottom: 1px solid transparent;
  transition: background var(--motion-card) var(--ease), border-color var(--motion-card) var(--ease),
              box-shadow var(--motion-card) var(--ease);
}
.site-header.scrolled {
  background: var(--glass-bg);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  border-bottom-color: var(--border-subtle);
  box-shadow: var(--header-shadow);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: var(--header-h);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text-primary);
  font-weight: 700;
  font-size: 1.12rem;
  letter-spacing: -0.02em;
  flex-shrink: 0;
}
.brand img {
  width: 32px;
  height: 32px;
}

/* Propeller spin — header logo rotates; hover revs it up like a throttle. */
@keyframes propeller-spin {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}
.site-header .brand img {
  animation: propeller-spin 8s linear infinite;
  will-change: transform;
}
.site-header .brand:hover img,
.site-header .brand:focus-visible img {
  animation-duration: 1.1s;
}

.main-nav ul { display: flex; align-items: center; gap: 4px; list-style: none; }

.nav-link {
  display: block;
  padding: 8px 15px;
  border-radius: 999px;
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  transition: color var(--motion-base) var(--ease), background var(--motion-base) var(--ease);
}
.nav-link:focus-visible { color: var(--text-primary); background: var(--nav-hover-bg); }
@media (hover: hover) and (pointer: fine) {
  .nav-link:hover { color: var(--text-primary); background: var(--nav-hover-bg); }
}
.nav-link.active {
  color: var(--text-primary);
  background: var(--nav-active-bg);
  box-shadow: inset 0 0 0 1px var(--border-subtle);
}

.header-actions { display: flex; align-items: center; gap: 12px; }

/* Theme toggle */
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 999px;
  border: 1px solid var(--border-subtle);
  background: var(--btn-ghost-bg);
  color: var(--text-primary);
  cursor: pointer;
  transition: background var(--motion-base) var(--ease), border-color var(--motion-base) var(--ease),
              transform var(--motion-fast) var(--ease), color var(--motion-base) var(--ease);
}
.theme-toggle:focus-visible { background: var(--btn-ghost-hover); border-color: var(--border-strong); }
@media (hover: hover) and (pointer: fine) {
  .theme-toggle:hover { background: var(--btn-ghost-hover); border-color: var(--border-strong); }
}
.theme-toggle:active { transform: scale(0.92); }
.theme-toggle svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.theme-toggle .icon-moon { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-sun { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-moon { display: block; }
.theme-toggle.theme-flip svg { animation: themeIconFlip 0.45s var(--ease); }
@keyframes themeIconFlip {
  from { transform: rotate(-100deg) scale(0.6); opacity: 0; }
  to   { transform: none; opacity: 1; }
}

/* Hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  padding: 10px;
  border: 1px solid var(--border-subtle);
  border-radius: 999px;
  background: var(--btn-ghost-bg);
  cursor: pointer;
}
.nav-toggle span {
  display: block;
  width: 18px;
  height: 1.5px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform var(--motion-card) var(--ease), opacity var(--motion-fast) var(--ease);
}
.nav-toggle.active span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* --------------------------------------------------------------------------
   6. Buttons & chips
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
  transition: transform var(--motion-base) var(--ease), box-shadow var(--motion-base) var(--ease),
              background var(--motion-base) var(--ease), border-color var(--motion-base) var(--ease),
              filter var(--motion-base) var(--ease);
}
.btn:focus-visible { transform: translateY(-1px); }
.btn:active { transform: scale(0.98); }
@media (hover: hover) and (pointer: fine) {
  .btn:hover { transform: translateY(-1px); }
}

.btn-primary {
  background: linear-gradient(135deg, var(--color1) 10%, #646ff8 55%, var(--color2) 115%);
  color: #fff;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.22), 0 8px 24px rgba(10, 132, 255, 0.18);
}
.btn-primary:focus-visible {
  filter: brightness(1.08);
  box-shadow: var(--glow-blue), inset 0 1px 0 rgba(255, 255, 255, 0.22);
}
@media (hover: hover) and (pointer: fine) {
  .btn-primary:hover {
    filter: brightness(1.08);
    box-shadow: var(--glow-blue), inset 0 1px 0 rgba(255, 255, 255, 0.22);
  }
}

.btn-ghost {
  background: var(--btn-ghost-bg);
  border-color: var(--border-subtle);
  color: var(--text-primary);
}
.btn-ghost:focus-visible { background: var(--btn-ghost-hover); border-color: var(--border-strong); }
@media (hover: hover) and (pointer: fine) {
  .btn-ghost:hover { background: var(--btn-ghost-hover); border-color: var(--border-strong); }
}

.btn-sm { padding: 8px 16px; font-size: 0.88rem; }
.btn-lg { padding: 15px 30px; font-size: 1.02rem; }

.btn .arrow { transition: transform var(--motion-base) var(--ease); }
.btn:focus-visible .arrow { transform: translateX(3px); }
@media (hover: hover) and (pointer: fine) {
  .btn:hover .arrow { transform: translateX(3px); }
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border-radius: 999px;
  border: 1px solid var(--border-subtle);
  background: var(--chip-bg);
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  white-space: nowrap;
}

a.chip { text-decoration: none; transition: border-color var(--motion-base) var(--ease), color var(--motion-base) var(--ease), background var(--motion-base) var(--ease); }
a.chip:focus-visible {
  border-color: var(--border-active);
  color: var(--text-primary);
  background: rgba(10, 132, 255, 0.08);
}
@media (hover: hover) and (pointer: fine) {
  a.chip:hover {
    border-color: var(--border-active);
    color: var(--text-primary);
    background: rgba(10, 132, 255, 0.08);
  }
}

.chips { display: flex; flex-wrap: wrap; gap: 10px; }

.chip--blue { color: #0a84ff; border-color: rgba(10, 132, 255, 0.3); background: rgba(10, 132, 255, 0.07); }
.chip--purple { color: #a855d8; border-color: rgba(191, 90, 242, 0.3); background: rgba(191, 90, 242, 0.07); }
.chip--coral { color: #d9432e; border-color: rgba(244, 83, 58, 0.3); background: rgba(244, 83, 58, 0.07); }
:root[data-theme="dark"] .chip--blue { color: #6db3ff; }
:root[data-theme="dark"] .chip--purple { color: #d9a8f8; }
:root[data-theme="dark"] .chip--coral { color: #ff9a8b; }

/* --------------------------------------------------------------------------
   7. Hero
   -------------------------------------------------------------------------- */
.hero {
  position: relative;
  overflow: hidden;
  padding: calc(var(--header-h) + clamp(88px, 12vw, 150px)) 0 clamp(72px, 9vw, 110px);
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(900px 480px at 15% -5%, var(--hero-a, var(--ambient-a)), transparent 62%),
    radial-gradient(820px 440px at 88% 12%, var(--hero-b, var(--ambient-b)), transparent 60%);
  pointer-events: none;
}
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, var(--hero-dots) 1px, transparent 1px);
  background-size: 30px 30px;
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 20%, #000 20%, transparent 72%);
  mask-image: radial-gradient(ellipse 70% 60% at 50% 20%, #000 20%, transparent 72%);
  pointer-events: none;
}

.hero-inner { position: relative; z-index: 1; max-width: 54em; }
.hero-inner h1 { margin-bottom: 24px; }
.hero-inner .lede { margin-bottom: 36px; max-width: 40em; }

.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 33px; }

.hero-chip-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 44px; }

/* Hero entrance animation */
.hero .kicker, .hero h1, .hero .lede, .hero .hero-actions, .hero .hero-chip-row {
  opacity: 0;
  animation: heroIn var(--motion-enter) var(--ease) forwards;
}
.hero h1 { animation-delay: 0.05s; }
.hero .lede { animation-delay: 0.12s; }
.hero .hero-actions { animation-delay: 0.19s; }
.hero .hero-chip-row { animation-delay: 0.26s; }

@keyframes heroIn {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: none; }
}

/* Scroll cue — quiet hairline with a traveling dot */
.hero-scroll-cue {
  position: absolute;
  left: 50%;
  bottom: 26px;
  width: 1px;
  height: 46px;
  transform: translateX(-50%);
  overflow: hidden;
  pointer-events: none;
  opacity: 0;
  animation: cueIn var(--motion-enter) var(--ease) 0.95s forwards;
}
.hero-scroll-cue::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent, var(--text-secondary));
  opacity: 0.45;
}
.hero-scroll-cue::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 0;
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--color1);
  box-shadow: 0 0 8px var(--color1);
  transform: translate(-50%, -4px);
  animation: cueDrop 2.4s var(--ease) 1.6s infinite;
}
@keyframes cueIn { to { opacity: 1; } }
@keyframes cueDrop {
  0%   { transform: translate(-50%, -4px); opacity: 0; }
  18%  { opacity: 1; }
  82%  { opacity: 1; }
  100% { transform: translate(-50%, 46px); opacity: 0; }
}
@media (max-width: 860px) {
  .hero-scroll-cue { display: none; }
}

/* --------------------------------------------------------------------------
   8. Cards
   -------------------------------------------------------------------------- */
.glass-card {
  background: linear-gradient(180deg, var(--card-grad-a), var(--card-grad-b));
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 28px;
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  transition: background var(--motion-card) var(--ease), border-color var(--motion-card) var(--ease);
}
.glass-card h3 { margin-bottom: 10px; }
.glass-card p { font-size: 0.96rem; }

.card-featured {
  border-color: var(--border-active);
  box-shadow: var(--glow-blue);
}
.card-featured--purple { border-color: rgba(191, 90, 242, 0.35); box-shadow: var(--glow-purple); }
.card-featured--coral { border-color: rgba(244, 83, 58, 0.35); box-shadow: var(--glow-coral); }

.icon-box {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--icon-bg);
  background: color-mix(in srgb, var(--accent, var(--color1)) 14%, transparent);
  border: 1px solid var(--icon-border);
  border: 1px solid color-mix(in srgb, var(--accent, var(--color1)) 30%, transparent);
  color: var(--accent, var(--color1));
  margin-bottom: 20px;
}
.icon-box svg { width: 24px; height: 24px; }

/* Feature list */
.feature-list { list-style: none; margin-top: 16px; display: grid; gap: 9px; }
.feature-list li {
  position: relative;
  padding-left: 22px;
  font-size: 0.94rem;
  color: var(--text-body);
}
.feature-list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 0.62em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent, var(--color1));
  box-shadow: 0 0 10px var(--accent, var(--color1));
}
.feature-list strong { color: var(--text-primary); font-weight: 600; }

/* Ecosystem cards */
.eco-card {
  position: relative;
  display: flex;
  flex-direction: column;
  text-decoration: none;
  transition: transform var(--motion-card) var(--ease), border-color var(--motion-card) var(--ease), box-shadow var(--motion-card) var(--ease);
}
.eco-card:focus-visible { transform: translateY(-3px); border-color: var(--border-strong); box-shadow: var(--shadow-lift); }
.eco-card p { flex: 1; }
.eco-card .eco-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 22px;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color1);
}
.eco-card[data-accent="purple"] .eco-link { color: var(--color2); }
.eco-card[data-accent="coral"] .eco-link { color: var(--color3); }
.eco-card .arrow { transition: transform var(--motion-base) var(--ease); }
.eco-card:focus-visible .arrow { transform: translateX(4px); }
@media (hover: hover) and (pointer: fine) {
  .eco-card:hover { transform: translateY(-3px); border-color: var(--border-strong); box-shadow: var(--shadow-lift); }
  .eco-card:hover .arrow { transform: translateX(4px); }
}

/* Contact cards */
.contact-card a.email {
  display: inline-block;
  margin-top: 16px;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--color1);
  text-decoration: none;
  border-bottom: 1px solid var(--border-active);
  padding-bottom: 2px;
  transition: color var(--motion-base) var(--ease), border-color var(--motion-base) var(--ease);
}
.contact-card a.email:focus-visible { color: #0a5fd0; border-color: #0a5fd0; }
:root[data-theme="dark"] .contact-card a.email:focus-visible { color: #6db3ff; border-color: #6db3ff; }
@media (hover: hover) and (pointer: fine) {
  .contact-card a.email:hover { color: #0a5fd0; border-color: #0a5fd0; }
  :root[data-theme="dark"] .contact-card a.email:hover { color: #6db3ff; border-color: #6db3ff; }
}

/* --------------------------------------------------------------------------
   9. Triad component grid (Model / Engram / Dynamic UI)
   -------------------------------------------------------------------------- */
.triad-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }

.triad-card {
  --accent: var(--color1);
  position: relative;
  overflow: hidden;
  transition: transform var(--motion-card) var(--ease), border-color var(--motion-card) var(--ease), box-shadow var(--motion-card) var(--ease);
}
.triad-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0.9;
}
.triad-card::after {
  content: "";
  position: absolute;
  top: -70px;
  right: -70px;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: radial-gradient(circle, color-mix(in srgb, var(--accent) 22%, transparent), transparent 70%);
  opacity: 0;
  transition: opacity var(--motion-card) var(--ease);
  pointer-events: none;
}
@media (hover: hover) and (pointer: fine) {
  .triad-card:hover {
    transform: translateY(-3px);
    border-color: color-mix(in srgb, var(--accent) 35%, transparent);
    box-shadow: var(--shadow-lift), 0 0 0 1px color-mix(in srgb, var(--accent) 22%, transparent);
  }
  .triad-card:hover::after { opacity: 1; }
}

.triad-card[data-accent="model"]  { --accent: var(--color2); }
.triad-card[data-accent="engram"] { --accent: var(--color1); }
.triad-card[data-accent="ui"]     { --accent: var(--color3); }

/* --------------------------------------------------------------------------
   10. Compilation pipeline diagram
   -------------------------------------------------------------------------- */
.pipeline {
  display: flex;
  align-items: stretch;
  justify-content: center;
  gap: 12px;
}

.pipe-node {
  flex: 1 1 190px;
  min-width: 0;
  text-align: center;
  padding: 26px 20px;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, var(--card-grad-a), var(--card-grad-b));
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  transition: transform var(--motion-card) var(--ease), border-color var(--motion-card) var(--ease), box-shadow var(--motion-card) var(--ease),
              background var(--motion-card) var(--ease);
}
@media (hover: hover) and (pointer: fine) {
  .pipe-node:hover {
    transform: translateY(-3px);
    border-color: var(--border-active);
    box-shadow: var(--glow-blue);
  }
}
.pipe-node .icon-box { margin-bottom: 16px; }
.pipe-node h3 { font-size: 1.05rem; margin-bottom: 8px; }
.pipe-node p { font-size: 0.88rem; }

.pipe-node--gate { border-color: rgba(10, 132, 255, 0.3); }
.pipe-node--center { flex: 1.35 1 260px; }

.target-chips {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin-top: 14px;
}

.pipe-link {
  flex: 0 0 auto;
  width: 52px;
  align-self: center;
  overflow: visible;
}

.flow-line {
  stroke: var(--color1);
  stroke-width: 2;
  stroke-dasharray: 6 6;
  animation: pulseStroke 1.2s linear infinite;
  filter: drop-shadow(0 0 6px var(--flow-glow-1));
}
.flow-line--purple {
  stroke: var(--color2);
  filter: drop-shadow(0 0 6px var(--flow-glow-2));
}
.flow-line--coral {
  stroke: var(--color3);
  filter: drop-shadow(0 0 6px var(--flow-glow-3));
}

@keyframes pulseStroke {
  0%   { stroke-dashoffset: 24; }
  100% { stroke-dashoffset: 0; }
}

.arrow-head {
  fill: var(--color1);
  animation: arrowPulse 1.2s ease-in-out infinite;
}
.arrow-head--purple { fill: var(--color2); }
.arrow-head--coral { fill: var(--color3); }

@keyframes arrowPulse {
  0%, 100% { opacity: 0.25; }
  50%      { opacity: 1; }
}

.flow-line,
.arrow-head,
.bridge-track::before,
.bridge-track::after,
.dual-link-track::before { animation-play-state: paused; }

.reveal-ready [data-reveal].motion-in-view .flow-line,
.reveal-ready [data-reveal].motion-in-view .arrow-head,
.reveal-ready [data-reveal].motion-in-view .bridge-track::before,
.reveal-ready [data-reveal].motion-in-view .bridge-track::after,
.reveal-ready [data-reveal].motion-in-view .dual-link-track::before { animation-play-state: running; }

/* --------------------------------------------------------------------------
   11. Bridge / topology diagrams (Protocol)
   -------------------------------------------------------------------------- */
.topology {
  display: grid;
  gap: 26px;
  max-width: 780px;
  margin-inline: auto;
}

.tier-card {
  position: relative;
  overflow: hidden;
  padding: 30px;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  background: linear-gradient(180deg, var(--card-grad-a), var(--card-grad-b));
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  transition: transform var(--motion-card) var(--ease), border-color var(--motion-card) var(--ease), box-shadow var(--motion-card) var(--ease),
              background var(--motion-card) var(--ease);
}
@media (hover: hover) and (pointer: fine) {
  .tier-card:hover {
    transform: translateY(-3px);
    border-color: color-mix(in srgb, var(--accent, var(--color1)) 40%, transparent);
    box-shadow: var(--shadow-lift);
  }
}
.tier-card::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: linear-gradient(180deg, transparent, var(--accent, var(--color1)), transparent);
}
.tier-card--l1 { --accent: var(--color1); }
.tier-card--l3 { --accent: var(--color2); }

.tier-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 13px;
  border-radius: 999px;
  border: 1px solid var(--border-strong);
  border: 1px solid color-mix(in srgb, var(--accent, var(--color1)) 35%, transparent);
  background: var(--chip-bg);
  background: color-mix(in srgb, var(--accent, var(--color1)) 10%, transparent);
  color: var(--text-primary);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 18px;
}
.tier-card h3 { font-size: 1.35rem; margin-bottom: 8px; }
.tier-card .mono { color: var(--accent, var(--color1)); }

/* Synaptic Bridge connector */
.bridge {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 4px 0;
}
.bridge-track {
  position: relative;
  --flow-travel: 85px;
  width: 3px;
  height: 92px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--color1), var(--color2));
  box-shadow: 0 0 18px rgba(10, 132, 255, 0.35);
}
.bridge-track::before,
.bridge-track::after {
  content: "";
  position: absolute;
  left: 50%;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  transform: translate(-50%, 0);
}
.bridge-track::before {
  top: 0;
  background: var(--color2);
  box-shadow: 0 0 12px var(--color2);
  animation: bridgeDown 2.2s ease-in-out infinite;
}
.bridge-track::after {
  bottom: 0;
  background: var(--color1);
  box-shadow: 0 0 12px var(--color1);
  animation: bridgeUp 2.2s ease-in-out infinite;
}
@keyframes bridgeDown {
  0%   { transform: translate(-50%, 0); opacity: 0; }
  12%  { opacity: 1; }
  88%  { opacity: 1; }
  100% { transform: translate(-50%, var(--flow-travel)); opacity: 0; }
}
@keyframes bridgeUp {
  0%   { transform: translate(-50%, 0); opacity: 0; }
  12%  { opacity: 1; }
  88%  { opacity: 1; }
  100% { transform: translate(-50%, calc(0px - var(--flow-travel))); opacity: 0; }
}
.bridge-label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-secondary);
}
.bridge .chip { font-size: 0.75rem; }

/* Dual-VM / isomorphic engine split */
.dual-grid {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: stretch;
  gap: 16px;
}

.vm-card {
  position: relative;
  overflow: hidden;
}
.vm-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--accent, var(--color1)), transparent);
}
.vm-card--judge { --accent: var(--color1); }
.vm-card--worker { --accent: var(--color2); }
.vm-card--browser { --accent: var(--color3); }
.vm-card--cloud { --accent: var(--color1); }
.vm-card .vm-role {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent, var(--color1));
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.dual-link {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 0 6px;
}
.dual-link-track {
  position: relative;
  --flow-travel: 113px;
  width: 3px;
  height: 120px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--color1), var(--color3));
  box-shadow: 0 0 16px rgba(10, 132, 255, 0.3);
}
.dual-link-track::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 0;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  transform: translateX(-50%);
  background: var(--color1);
  box-shadow: 0 0 12px var(--color1);
  animation: bridgeDown 1.8s ease-in-out infinite;
}
.dual-link-label {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  text-align: center;
  color: var(--text-secondary);
  max-width: 110px;
  line-height: 1.4;
}

/* Steps flow (Oblivious Routing / economy) */
.steps-flow {
  display: flex;
  align-items: stretch;
  justify-content: center;
  gap: 12px;
}
.step-card {
  flex: 1 1 200px;
  min-width: 0;
  padding: 26px 22px;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, var(--card-grad-a), var(--card-grad-b));
  transition: transform var(--motion-card) var(--ease), border-color var(--motion-card) var(--ease), box-shadow var(--motion-card) var(--ease),
              background var(--motion-card) var(--ease);
}
@media (hover: hover) and (pointer: fine) {
  .step-card:hover { transform: translateY(-3px); border-color: var(--border-strong); box-shadow: var(--shadow-lift); }
}
.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 999px;
  border: 1px solid var(--border-active);
  background: rgba(10, 132, 255, 0.1);
  color: var(--color1);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 700;
  margin-bottom: 14px;
}
.step-card h3 { font-size: 1rem; margin-bottom: 8px; }
.step-card p { font-size: 0.88rem; }

/* Resolver grid */
.resolver-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.resolver-card {
  padding: 18px 20px;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  background: var(--resolver-bg);
  transition: transform var(--motion-base) var(--ease), border-color var(--motion-base) var(--ease), background var(--motion-base) var(--ease);
}
@media (hover: hover) and (pointer: fine) {
  .resolver-card:hover {
    transform: translateY(-2px);
    border-color: var(--border-active);
    background: rgba(10, 132, 255, 0.05);
  }
}
.resolver-name {
  font-family: var(--font-mono);
  font-size: 0.92rem;
  color: var(--text-primary);
  margin-bottom: 4px;
}
.resolver-desc { font-size: 0.84rem; color: var(--text-secondary); }

/* Callout */
.callout {
  display: grid;
  gap: 14px;
  padding: 26px 28px;
  border: 1px solid var(--border-subtle);
  border-left: 3px solid var(--color3);
  border-radius: var(--radius-lg);
  background: linear-gradient(90deg, rgba(244, 83, 58, 0.07), var(--callout-fade) 55%);
}
.callout h3 { font-size: 1.1rem; }
.callout p { font-size: 0.96rem; }

/* --------------------------------------------------------------------------
   11b. Rich Architecture Graphs & Interactive Diagrams
   -------------------------------------------------------------------------- */
.diagram-box {
  position: relative;
  overflow: hidden;
  padding: clamp(24px, 3.5vw, 38px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  background:
    radial-gradient(circle at 1px 1px, color-mix(in srgb, var(--text-secondary) 14%, transparent) 1px, transparent 0) 0 0 / 22px 22px,
    linear-gradient(180deg, var(--card-grad-a), var(--card-grad-b));
  box-shadow: var(--shadow-card);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
}

.diagram-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding-bottom: 18px;
  margin-bottom: 24px;
  border-bottom: 1px solid var(--border-subtle);
}

.diagram-title {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

.diagram-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color1);
  box-shadow: 0 0 10px var(--color1);
}
.diagram-dot--purple { background: var(--color2); box-shadow: 0 0 10px var(--color2); }
.diagram-dot--coral  { background: var(--color3); box-shadow: 0 0 10px var(--color3); }

/* Comparison Tracks (Trap vs. Advantage) */
.compare-diagram {
  display: grid;
  gap: 22px;
}

.compare-track {
  position: relative;
  padding: 22px 24px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-subtle);
  background: color-mix(in srgb, var(--bg-surface) 84%, transparent);
  transition: transform var(--motion-card) var(--ease), border-color var(--motion-card) var(--ease), box-shadow var(--motion-card) var(--ease);
}
.compare-track--danger {
  border-color: color-mix(in srgb, var(--color3) 34%, var(--border-subtle));
  background: linear-gradient(135deg, color-mix(in srgb, var(--color3) 7%, transparent), color-mix(in srgb, var(--bg-surface) 90%, transparent) 60%);
}
.compare-track--safe {
  border-color: color-mix(in srgb, var(--color1) 38%, var(--border-subtle));
  background: linear-gradient(135deg, color-mix(in srgb, var(--color1) 8%, transparent), color-mix(in srgb, var(--color2) 6%, transparent) 100%);
}

.compare-track-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 18px;
}

.compare-track-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.compare-track--danger .compare-track-label { color: var(--color3); }
.compare-track--safe .compare-track-label   { color: var(--color1); }

.compare-chain {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.chain-node {
  flex: 1 1 135px;
  min-width: 120px;
  padding: 14px 16px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  background: linear-gradient(180deg, var(--card-grad-a), var(--card-grad-b));
  text-align: center;
}
.chain-node strong {
  display: block;
  font-size: 0.88rem;
  color: var(--text-primary);
  margin-bottom: 3px;
}
.chain-node span {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.73rem;
  color: var(--text-secondary);
}
.chain-node--gate {
  border-color: color-mix(in srgb, var(--color1) 45%, transparent);
  box-shadow: 0 0 20px color-mix(in srgb, var(--color1) 14%, transparent);
}
.chain-node--danger {
  border-color: color-mix(in srgb, var(--color3) 40%, transparent);
}

.chain-arrow {
  flex: 0 0 auto;
  width: 34px;
  height: 18px;
  overflow: visible;
}

.outcome-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px dashed var(--border-subtle);
}

.outcome-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 11px;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 600;
}
.outcome-pill--danger {
  color: var(--color3);
  border: 1px solid color-mix(in srgb, var(--color3) 35%, transparent);
  background: color-mix(in srgb, var(--color3) 10%, transparent);
}
.outcome-pill--safe {
  color: var(--color1);
  border: 1px solid color-mix(in srgb, var(--color1) 35%, transparent);
  background: color-mix(in srgb, var(--color1) 10%, transparent);
}

/* Hierarchical Compilation Tree (Studio -> SIR -> Enterprise & Protocol) */
.arch-tree {
  display: flex;
  flex-direction: column;
  align-items: center;
  max-width: 880px;
  margin-inline: auto;
}

.arch-node {
  width: 100%;
  max-width: 620px;
  padding: 22px 26px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-subtle);
  background: linear-gradient(180deg, var(--card-grad-a), var(--card-grad-b));
  text-align: center;
  position: relative;
  transition: transform var(--motion-card) var(--ease), border-color var(--motion-card) var(--ease), box-shadow var(--motion-card) var(--ease);
}
@media (hover: hover) and (pointer: fine) {
  .arch-node:hover {
    transform: translateY(-2px);
    border-color: var(--border-active);
    box-shadow: var(--shadow-lift);
  }
}

.arch-node--studio {
  border-top: 3px solid var(--color3);
}
.arch-node--sir {
  max-width: 680px;
  border: 1px solid color-mix(in srgb, var(--color1) 42%, transparent);
  box-shadow: 0 0 28px color-mix(in srgb, var(--color1) 12%, transparent);
  background:
    radial-gradient(420px 140px at 50% 0%, color-mix(in srgb, var(--color1) 12%, transparent), transparent 70%),
    linear-gradient(180deg, var(--card-grad-a), var(--card-grad-b));
}
.arch-node--enterprise {
  border-top: 3px solid var(--color1);
  text-align: left;
}
.arch-node--protocol {
  border-top: 3px solid var(--color2);
  text-align: left;
}

.arch-node-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 10px;
  border: 1px solid var(--border-subtle);
  background: var(--chip-bg);
  color: var(--text-secondary);
}

.arch-node h3,
.arch-node h4 {
  font-size: 1.12rem;
  color: var(--text-primary);
  margin-bottom: 6px;
}
.arch-node p {
  font-size: 0.87rem;
  color: var(--text-body);
  margin: 0;
}

.arch-subpills {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin-top: 14px;
}
.arch-subpill {
  padding: 5px 11px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-subtle);
  background: color-mix(in srgb, var(--bg-surface) 80%, transparent);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-primary);
}
.arch-subpill--model  { border-color: color-mix(in srgb, var(--color2) 40%, transparent); color: var(--color2); }
.arch-subpill--engram { border-color: color-mix(in srgb, var(--color1) 40%, transparent); color: var(--color1); }
.arch-subpill--ui     { border-color: color-mix(in srgb, var(--color3) 40%, transparent); color: var(--color3); }

.arch-stem {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  position: relative;
  height: 52px;
  width: 100%;
}
.arch-stem svg {
  width: 24px;
  height: 52px;
  overflow: visible;
}
.arch-stem-label {
  position: absolute;
  padding: 2px 10px;
  border-radius: 999px;
  border: 1px solid var(--border-subtle);
  background: var(--bg-elevated);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-secondary);
  white-space: nowrap;
}

.arch-fork-svg {
  width: 100%;
  max-width: 680px;
  height: 58px;
  display: block;
  overflow: visible;
}

.arch-branches-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  width: 100%;
}

.arch-branches-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  width: 100%;
}

.arch-branches-5 {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 12px;
  width: 100%;
}

.db-node {
  padding: 16px 12px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  background: linear-gradient(180deg, var(--card-grad-a), var(--card-grad-b));
  text-align: center;
  transition: transform var(--motion-base) var(--ease), border-color var(--motion-base) var(--ease);
}
@media (hover: hover) and (pointer: fine) {
  .db-node:hover {
    transform: translateY(-3px);
    border-color: var(--border-active);
  }
}
.db-node strong {
  display: block;
  font-size: 0.9rem;
  color: var(--text-primary);
  margin-bottom: 4px;
}
.db-node span {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-secondary);
}

/* Visual ERD Canvas (ModelGraph in sir.html) */
.erd-canvas {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  align-items: start;
  position: relative;
}

.erd-table-node {
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  background: color-mix(in srgb, var(--bg-surface) 92%, transparent);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: transform var(--motion-base) var(--ease), border-color var(--motion-base) var(--ease);
}
@media (hover: hover) and (pointer: fine) {
  .erd-table-node:hover {
    transform: translateY(-2px);
    border-color: color-mix(in srgb, var(--color2) 45%, transparent);
  }
}
.erd-table-node--locked {
  border-top: 3px solid var(--color1);
}
.erd-table-node--custom {
  border-top: 3px solid var(--color2);
}

.erd-table-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border-subtle);
  background: color-mix(in srgb, var(--color2) 8%, transparent);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text-primary);
}
.erd-table-node--locked .erd-table-head {
  background: color-mix(in srgb, var(--color1) 8%, transparent);
}

.erd-badge {
  font-size: 0.65rem;
  font-weight: 600;
  padding: 2px 6px;
  border-radius: 4px;
  text-transform: uppercase;
  background: var(--chip-bg);
  color: var(--text-secondary);
}

.erd-fields {
  list-style: none;
  padding: 8px 12px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.74rem;
}
.erd-fields li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 4px 0;
  border-bottom: 1px dashed color-mix(in srgb, var(--border-subtle) 60%, transparent);
  color: var(--text-body);
}
.erd-fields li:last-child { border-bottom: 0; }
.erd-type { color: var(--text-secondary); font-size: 0.7rem; }
.erd-fk { color: var(--color2); font-weight: 600; }
.erd-pk { color: var(--color1); font-weight: 600; }

.erd-relations-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid var(--border-subtle);
}
.erd-edge-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid color-mix(in srgb, var(--color2) 38%, transparent);
  background: color-mix(in srgb, var(--color2) 9%, transparent);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-primary);
}

/* 7-Step Compiler Verification Pipeline */
.compiler-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 14px;
  width: 100%;
}

.compiler-gate-card {
  position: relative;
  padding: 16px 18px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-subtle);
  background: linear-gradient(180deg, var(--card-grad-a), var(--card-grad-b));
  transition: transform var(--motion-base) var(--ease), border-color var(--motion-base) var(--ease);
}
@media (hover: hover) and (pointer: fine) {
  .compiler-gate-card:hover {
    transform: translateY(-2px);
    border-color: var(--border-active);
  }
}
.compiler-gate-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 8px;
}
.compiler-gate-num {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  font-weight: 700;
  color: var(--color1);
  padding: 2px 8px;
  border-radius: 999px;
  background: rgba(10, 132, 255, 0.12);
  border: 1px solid rgba(10, 132, 255, 0.3);
}
.compiler-gate-pass {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 700;
  color: #30d158;
  letter-spacing: 0.06em;
}
.compiler-gate-card h4 {
  font-size: 0.92rem;
  color: var(--text-primary);
  margin-bottom: 4px;
}
.compiler-gate-card p {
  font-size: 0.78rem;
  color: var(--text-secondary);
  margin: 0;
  line-height: 1.45;
}

/* Neuroanatomical 4-Node Diamond Topology */
.neuro-diamond {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0;
  max-width: 820px;
  margin-inline: auto;
}
.neuro-middle {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 14px;
  width: 100%;
}
.neuro-bridge-h {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 0 8px;
}
.neuro-bridge-h svg {
  width: 96px;
  height: 24px;
  overflow: visible;
}

/* Activate animations inside .diagram-box when in view */
.reveal-ready .diagram-box[data-reveal].motion-in-view .flow-line,
.reveal-ready .diagram-box[data-reveal].motion-in-view .arrow-head,
.reveal-ready .diagram-box[data-reveal].motion-in-view .bridge-track::before,
.reveal-ready .diagram-box[data-reveal].motion-in-view .bridge-track::after,
.reveal-ready .diagram-box[data-reveal].motion-in-view .dual-link-track::before {
  animation-play-state: running;
}

/* --------------------------------------------------------------------------
   12. Tables
   -------------------------------------------------------------------------- */
.table-scroll {
  overflow-x: auto;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  background: var(--bg-surface);
  box-shadow: var(--shadow-card);
}
.compare-table { width: 100%; border-collapse: collapse; min-width: 820px; font-size: 0.92rem; }
.compare-table th,
.compare-table td {
  padding: 18px 22px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--border-subtle);
}
.compare-table thead th {
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-secondary);
  background: var(--table-head-bg);
}
.compare-table tbody th {
  color: var(--text-primary);
  font-weight: 600;
  white-space: nowrap;
}
.compare-table td { color: var(--text-body); }
.compare-table tbody tr:last-child th,
.compare-table tbody tr:last-child td { border-bottom: 0; }
.compare-table tbody td,
.compare-table tbody th { transition: background-color var(--motion-fast) var(--ease); }
@media (hover: hover) and (pointer: fine) {
  .compare-table tbody tr:hover td,
  .compare-table tbody tr:hover th { background: var(--table-hover); }
}
.compare-table td.col-highlight { background: var(--col-highlight); }
.compare-table th.col-highlight { color: var(--color1); }
.compare-table strong { color: var(--text-primary); }
.compare-table .mono { color: var(--text-secondary); font-size: 0.85em; }

/* --------------------------------------------------------------------------
   13. CTA band
   -------------------------------------------------------------------------- */
.cta-band {
  position: relative;
  overflow: hidden;
  display: grid;
  gap: 28px;
  padding: clamp(36px, 5vw, 56px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-xl);
  background:
    radial-gradient(640px 300px at 12% 0%, var(--cta-a), transparent 65%),
    radial-gradient(560px 280px at 95% 100%, var(--cta-b), transparent 60%),
    linear-gradient(180deg, var(--card-grad-a), var(--card-grad-b));
  transition: background var(--motion-card) var(--ease);
}
.cta-band h2 { font-size: clamp(1.7rem, 3.6vw, 2.4rem); }
.cta-band p { max-width: 40em; }
.cta-band .hero-actions { margin-top: 6px; }

/* --------------------------------------------------------------------------
   14. Footer
   -------------------------------------------------------------------------- */
.site-footer {
  border-top: 1px solid var(--border-subtle);
  margin-top: clamp(40px, 6vw, 80px);
  background: linear-gradient(180deg, transparent, var(--footer-grad));
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: start;
  gap: 48px;
  padding-block: clamp(48px, 6vw, 72px);
}

.footer-brand p { margin-top: 16px; font-size: 0.92rem; max-width: 30em; }

.footer-col h3 {
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-secondary);
  margin-bottom: 14px;
}
.footer-col ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 28px;
}
.footer-col a {
  color: var(--text-body);
  text-decoration: none;
  font-size: 0.93rem;
  transition: color var(--motion-base) var(--ease);
}
.footer-col a:focus-visible { color: var(--text-primary); }
@media (hover: hover) and (pointer: fine) {
  .footer-col a:hover { color: var(--text-primary); }
}

.footer-legal {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding-block: 22px;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.82rem;
  color: var(--text-secondary);
}

/* --------------------------------------------------------------------------
   15. Mobile drawer
   -------------------------------------------------------------------------- */
.drawer {
  position: fixed;
  inset: 0;
  z-index: 90;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: calc(var(--header-h) + 40px) 32px 48px;
  background: var(--drawer-bg);
  -webkit-backdrop-filter: blur(24px);
  backdrop-filter: blur(24px);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--motion-drawer) var(--ease),
              visibility 0s linear var(--motion-drawer),
              background var(--motion-card) var(--ease);
}
.drawer.open {
  opacity: 1;
  visibility: visible;
  transition-delay: 0s, 0s, 0s;
}

.drawer-inner { display: grid; }
.drawer-link {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 2px;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-primary);
  text-decoration: none;
  font-size: clamp(1.6rem, 6vw, 2.1rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  opacity: 0;
  transform: translateY(14px);
  transition: opacity var(--motion-card) var(--ease), transform var(--motion-card) var(--ease), color var(--motion-base) var(--ease);
}
.drawer.open .drawer-link { opacity: 1; transform: none; }
.drawer:not(.open) .drawer-link:nth-child(1) { transition-delay: 0.16s; }
.drawer:not(.open) .drawer-link:nth-child(2) { transition-delay: 0.12s; }
.drawer:not(.open) .drawer-link:nth-child(3) { transition-delay: 0.08s; }
.drawer:not(.open) .drawer-link:nth-child(4) { transition-delay: 0.04s; }
.drawer:not(.open) .drawer-link:nth-child(5) { transition-delay: 0s; }
.drawer.open .drawer-link:nth-child(1) { transition-delay: 0s; }
.drawer.open .drawer-link:nth-child(2) { transition-delay: 0.05s; }
.drawer.open .drawer-link:nth-child(3) { transition-delay: 0.1s; }
.drawer.open .drawer-link:nth-child(4) { transition-delay: 0.15s; }
.drawer.open .drawer-link:nth-child(5) { transition-delay: 0.2s; }
.drawer-link:focus-visible { color: var(--color1); }
@media (hover: hover) and (pointer: fine) {
  .drawer-link:hover { color: var(--color1); }
}
.drawer-link.active { color: var(--color1); }
.drawer-index { font-family: var(--font-mono); font-size: 0.8rem; color: var(--text-secondary); }

.drawer-cta { align-self: flex-start; margin-top: 28px; }

/* --------------------------------------------------------------------------
   16. Reveal-on-scroll animations
   Content stays visible unless JS successfully installs the observer.
   -------------------------------------------------------------------------- */
.reveal-ready [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity var(--motion-enter) var(--ease), transform var(--motion-enter) var(--ease);
}
.reveal-ready [data-reveal].in-view { opacity: 1; transform: none; }

.reveal-ready [data-reveal="left"] { transform: translateX(-18px); }
.reveal-ready [data-reveal="right"] { transform: translateX(18px); }
.reveal-ready [data-reveal="left"].in-view,
.reveal-ready [data-reveal="right"].in-view { transform: none; }

.reveal-ready .stagger > * {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity var(--motion-card) var(--ease) calc(var(--i, 0) * 50ms),
              transform var(--motion-card) var(--ease) calc(var(--i, 0) * 50ms);
}
.reveal-ready .stagger.in-view > * { opacity: 1; transform: none; }

/* --------------------------------------------------------------------------
   17. Responsive
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-5 { grid-template-columns: repeat(3, 1fr); }
  .triad-grid { grid-template-columns: 1fr; }
  .resolver-grid { grid-template-columns: repeat(2, 1fr); }
  .pipeline { flex-wrap: wrap; }
  .pipe-node { flex: 1 1 42%; }
  .pipe-link { width: 40px; }
  .steps-flow { flex-wrap: wrap; }
  .step-card { flex: 1 1 44%; }
  .erd-canvas { grid-template-columns: repeat(2, 1fr); }
  .arch-branches-5 { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 900px) {
  .pipeline,
  .steps-flow { flex-direction: column; align-items: stretch; }
  .pipe-node,
  .step-card { flex: 1 1 auto; }
  .pipe-link {
    align-self: center;
    transform: rotate(90deg);
    width: 44px;
    margin-block: 6px;
  }
  .dual-grid { grid-template-columns: 1fr; gap: 20px; }
  .dual-link { flex-direction: row; padding: 6px 0; }
  .dual-link-track { width: 120px; height: 3px; }
  .dual-link-track::before {
    left: 0; top: 50%;
    transform: translateY(-50%);
    animation-name: bridgeRight;
  }
  @keyframes bridgeRight {
    0%   { transform: translate(0, -50%); opacity: 0; }
    12%  { opacity: 1; }
    88%  { opacity: 1; }
    100% { transform: translate(var(--flow-travel), -50%); opacity: 0; }
  }
  .dual-link-label { max-width: none; }
  .arch-branches-2,
  .arch-branches-3 { grid-template-columns: 1fr; }
  .arch-fork-svg { height: 36px; }
  .neuro-middle { grid-template-columns: 1fr; gap: 16px; }
  .neuro-bridge-h svg { transform: rotate(90deg); margin-block: 8px; }
}

@media (max-width: 860px) {
  .main-nav { display: none; }
  .header-actions .btn { display: none; }
  .nav-toggle { display: flex; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-brand { grid-column: auto; }
}

@media (max-width: 640px) {
  .grid-2, .grid-3, .grid-4, .grid-5,
  .resolver-grid,
  .erd-canvas,
  .arch-branches-5 { grid-template-columns: 1fr; }
  .compare-chain { flex-direction: column; align-items: stretch; }
  .chain-arrow { align-self: center; transform: rotate(90deg); margin-block: 4px; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-brand { grid-column: auto; }
  .footer-legal { flex-direction: column; align-items: flex-start; }
  .hero-actions .btn { width: 100%; }
  .section-head--center { text-align: left; }
}

/* --------------------------------------------------------------------------
   18. Reduced motion
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    animation-delay: 0s !important;
    transition-duration: 0.01ms !important;
    transition-delay: 0s !important;
  }
  html { scroll-behavior: auto; }
  .reveal-ready [data-reveal], .reveal-ready .stagger > *,
  .hero .kicker, .hero h1, .hero .lede, .hero .hero-actions, .hero .hero-chip-row,
  .drawer-link {
    opacity: 1 !important;
    transform: none !important;
  }
  .hero .intro-letter,
  .hero .hero-actions > *,
  .hero .hero-chip-row > * { opacity: 1 !important; transform: none !important; }
  .hero-intro,
  .hero-scroll-cue { display: none !important; }
  .bridge-track::before, .bridge-track::after,
  .dual-link-track::before { display: none; }
}

/* --------------------------------------------------------------------------
   19. Anime.js hero intro
   -------------------------------------------------------------------------- */
/* With JS active, the hero waits for the Anime.js sequence to reveal it. */
html.js-intro .hero .kicker,
html.js-intro .hero h1,
html.js-intro .hero .lede,
html.js-intro .hero .hero-actions,
html.js-intro .hero .hero-chip-row { animation: none; opacity: 0; }
html.js-intro .hero .hero-scroll-cue { animation: none; opacity: 0; }

html.js-intro .hero.intro-complete .kicker,
html.js-intro .hero.intro-complete h1,
html.js-intro .hero.intro-complete .lede,
html.js-intro .hero.intro-complete .hero-actions,
html.js-intro .hero.intro-complete .hero-chip-row {
  animation: none;
  opacity: 1;
  transform: none;
}

/* Sunrise mark */
.hero-mark {
  width: 96px;
  height: 96px;
  margin-bottom: 30px;
  shape-rendering: geometricPrecision;
  filter: drop-shadow(0 0 12px rgba(191, 90, 242, 0.2));
}
/* The hero sun keeps slowly turning once the intro completes. */
.hero-mark-spin {
  transform-box: view-box;
  transform-origin: 32px 32px;
}
.hero.intro-complete .hero-mark-spin {
  animation: propeller-spin 24s linear infinite;
}
/* Split headline */
.intro-letter {
  display: inline-block;
  transform-origin: 50% 100%;
  will-change: transform, opacity;
}

/* Ambient field — drifting blobs & orbit ring */
:root {
  --blob-a: rgba(10, 132, 255, 0.10);
  --blob-b: rgba(164, 74, 217, 0.09);
  --blob-line-a: rgba(10, 132, 255, 0.26);
}
:root[data-theme="dark"] {
  --blob-a: rgba(10, 132, 255, 0.17);
  --blob-b: rgba(191, 90, 242, 0.15);
  --blob-line-a: rgba(10, 132, 255, 0.38);
}

.hero-intro {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
  z-index: 0;
  opacity: 0;
  will-change: opacity, transform;
}
.hero-intro canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  pointer-events: none;
}
.hero-intro svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.intro-blob--a { fill: var(--blob-a); }
.intro-blob--b { fill: var(--blob-b); }
.intro-ring--a { fill: none; stroke: var(--blob-line-a); }
/* Rotate around the ring's own center (it lives inside a translated <g>). */
.intro-ring {
  transform-box: fill-box;
  transform-origin: 50% 50%;
}
.intro-orbit-pulse {
  transform-box: fill-box;
  transform-origin: 50% 50%;
}