/* ============================================================
   webITD Cloud — landing page stylesheet
   Dark, calm, technical. No external assets, no CDN.
   Tokens are semantic. The whole page is one stylesheet.
   ============================================================ */

/* ---------- 1. Tokens ---------- */
:root {
  /* Surfaces — luminance steps on near-black */
  --bg:            #07090C;   /* page */
  --bg-elev-1:     #0C0F14;   /* section backdrops */
  --bg-elev-2:     #11151C;   /* cards */
  --bg-elev-3:     #161B24;   /* hover / nested */

  /* Borders — semi-transparent white, Linear-style */
  --line-1:        rgba(255, 255, 255, 0.05);
  --line-2:        rgba(255, 255, 255, 0.08);
  --line-3:        rgba(255, 255, 255, 0.12);
  --line-strong:   rgba(255, 255, 255, 0.18);

  /* Text */
  --text:          #F2F4F7;   /* primary — not pure white */
  --text-2:        #C7CCD6;   /* body */
  --text-3:        #8B93A3;   /* muted */
  --text-4:        #5A6270;   /* dim */

  /* Accent — single chromatic family: cool indigo + cyan, restrained */
  --accent:        #7A8BFF;
  --accent-2:      #56C7E0;
  --accent-soft:   rgba(122, 139, 255, 0.14);
  --accent-line:   rgba(122, 139, 255, 0.32);

  /* Status */
  --ok:            #4DD08A;
  --warn:          #E0B95A;
  --danger:        #E07A6E;

  /* Radii */
  --r-1: 6px;
  --r-2: 10px;
  --r-3: 14px;
  --r-4: 20px;
  --r-pill: 999px;

  /* Type */
  --ff-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --ff-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, 'SF Mono', Menlo, Consolas, 'Liberation Mono', 'Courier New', monospace;

  /* Spacing scale (8px base, plus a few optical sizes) */
  --s-1: 4px;
  --s-2: 8px;
  --s-3: 12px;
  --s-4: 16px;
  --s-5: 24px;
  --s-6: 32px;
  --s-7: 48px;
  --s-8: 64px;
  --s-9: 96px;
  --s-10: 128px;

  /* Layout */
  --container: 1200px;
  --gutter: clamp(20px, 4vw, 40px);

  /* Motion */
  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
  --t-fast: 140ms;
  --t-med:  240ms;
}

/* ---------- 2. Reset (lean) ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

html {
  -webkit-text-size-adjust: 100%;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  color-scheme: dark;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--ff-sans);
  font-size: 16px;
  line-height: 1.6;
  font-feature-settings: 'ss01', 'cv11';
  letter-spacing: -0.005em;
  min-height: 100svh;
  overflow-x: hidden;
  background-image:
    radial-gradient(ellipse 60rem 40rem at 80% -10%, rgba(122, 139, 255, 0.10), transparent 60%),
    radial-gradient(ellipse 50rem 35rem at -10% 110%, rgba(86, 199, 224, 0.07), transparent 60%);
  background-attachment: fixed;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4, h5, h6, p { margin: 0; }
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

.mono { font-family: var(--ff-mono); font-size: 0.85em; letter-spacing: -0.01em; }

/* Skip link */
.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--bg-elev-3);
  color: var(--text);
  padding: 10px 14px;
  border-radius: var(--r-2);
  z-index: 999;
}
.skip:focus { left: 12px; top: 12px; }

/* ---------- 3. Container & layout primitives ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

section {
  padding: clamp(64px, 9vw, 112px) 0;
  border-top: 1px solid var(--line-1);
}

main > section:first-of-type { border-top: 0; }

/* ---------- 4. Type scale ---------- */
h1, h2, h3, h4 { font-weight: 600; letter-spacing: -0.025em; line-height: 1.1; color: var(--text); }
h1 { font-size: clamp(2.4rem, 5.6vw, 4.4rem); letter-spacing: -0.04em; line-height: 1.02; }
h2 { font-size: clamp(1.75rem, 3.2vw, 2.6rem); letter-spacing: -0.03em; }
h3 { font-size: 1.15rem; letter-spacing: -0.018em; }
h4 { font-size: 0.95rem; letter-spacing: -0.01em; }

p  { color: var(--text-2); }

.section-head {
  max-width: 760px;
  margin-bottom: clamp(32px, 5vw, 56px);
  display: grid;
  gap: var(--s-3);
}
.section-head h2 { text-wrap: balance; }
.section-sub { color: var(--text-3); max-width: 60ch; }

.section-eyebrow {
  font-family: var(--ff-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  color: var(--text-3);
  text-transform: uppercase;
}

/* ---------- 5. Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 18px;
  border-radius: var(--r-2);
  font-weight: 510;
  font-size: 0.94rem;
  letter-spacing: -0.01em;
  border: 1px solid transparent;
  transition: background var(--t-fast) var(--ease),
              border-color var(--t-fast) var(--ease),
              color var(--t-fast) var(--ease),
              transform var(--t-fast) var(--ease);
  white-space: nowrap;
  text-decoration: none;
}
.btn--primary {
  background: var(--text);
  color: #0A0C11;
  border-color: var(--text);
}
.btn--primary:hover { background: #FFFFFF; transform: translateY(-1px); }
.btn--ghost {
  background: rgba(255, 255, 255, 0.025);
  color: var(--text);
  border-color: var(--line-2);
}
.btn--ghost:hover { background: rgba(255, 255, 255, 0.05); border-color: var(--line-3); }
.btn--lg { min-height: 52px; padding: 0 22px; font-size: 1rem; }

/* ---------- 6. Topbar ---------- */
.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(7, 9, 12, 0.72);
  backdrop-filter: saturate(140%) blur(14px);
  -webkit-backdrop-filter: saturate(140%) blur(14px);
  border-bottom: 1px solid var(--line-1);
}
.topbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-5);
  min-height: 64px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  letter-spacing: -0.02em;
  font-size: 1.02rem;
  color: var(--text);
}
.brand__mark {
  display: inline-grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border-radius: 8px;
  background: var(--bg-elev-2);
  border: 1px solid var(--line-2);
  color: var(--accent);
}
.brand__text { display: inline-flex; align-items: baseline; gap: 2px; }
.brand__sub { color: var(--text-3); font-weight: 510; font-size: 0.9em; margin-left: 2px; }

.topnav {
  display: flex;
  gap: 4px;
  align-items: center;
}
.topnav a {
  padding: 8px 12px;
  border-radius: var(--r-1);
  font-size: 0.92rem;
  color: var(--text-2);
  transition: color var(--t-fast) var(--ease), background var(--t-fast) var(--ease);
}
.topnav a:hover { color: var(--text); background: rgba(255, 255, 255, 0.04); }

.topbar__cta { min-height: 38px; padding: 0 14px; font-size: 0.88rem; }

.topbar__actions {
  display: inline-flex;
  align-items: center;
  gap: var(--s-3);
}

/* Hamburger toggle — hidden on desktop */
.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: var(--r-2);
  border: 1px solid var(--line-2);
  background: rgba(255, 255, 255, 0.025);
  color: var(--text);
  padding: 0;
  position: relative;
  transition: background var(--t-fast) var(--ease),
              border-color var(--t-fast) var(--ease),
              transform var(--t-fast) var(--ease);
}
.nav-toggle:hover { background: rgba(255, 255, 255, 0.05); border-color: var(--line-3); }
.nav-toggle:active { transform: scale(0.97); }
.nav-toggle__bars {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}
.nav-toggle__bars > span {
  display: block;
  width: 18px;
  height: 1.8px;
  background: currentColor;
  border-radius: 2px;
  transition: transform var(--t-med) var(--ease),
              opacity var(--t-fast) var(--ease);
  transform-origin: center;
}
.nav-toggle.is-active .nav-toggle__bars > span:nth-child(1) {
  transform: translateY(6.8px) rotate(45deg);
}
.nav-toggle.is-active .nav-toggle__bars > span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0.3);
}
.nav-toggle.is-active .nav-toggle__bars > span:nth-child(3) {
  transform: translateY(-6.8px) rotate(-45deg);
}

/* Mobile nav panel — hidden on desktop */
.mobile-nav { display: none; }
.mobile-nav-overlay { display: none; }

/* ---------- 7. Hero ---------- */
.hero { padding-top: clamp(72px, 9vw, 128px); padding-bottom: clamp(72px, 9vw, 128px); border-top: 0; }
.hero__inner {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: clamp(40px, 6vw, 88px);
  align-items: center;
}
.hero__copy { display: grid; gap: var(--s-5); }
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border: 1px solid var(--line-2);
  background: rgba(255, 255, 255, 0.025);
  border-radius: var(--r-pill);
  font-family: var(--ff-mono);
  font-size: 0.78rem;
  color: var(--text-2);
  letter-spacing: 0.01em;
  width: fit-content;
}
.eyebrow__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-soft);
}
.hero__title { max-width: 14ch; }
.grad {
  background: linear-gradient(96deg, #B7C2FF 0%, #56C7E0 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero__lead { max-width: 56ch; color: var(--text-2); font-size: clamp(1.02rem, 1.4vw, 1.18rem); }
.hero__actions { display: flex; flex-wrap: wrap; gap: 12px; }
.hero__metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--s-4);
  margin: var(--s-3) 0 0;
  padding-top: var(--s-5);
  border-top: 1px solid var(--line-1);
}
.hero__metrics > div { display: grid; gap: 4px; }
.hero__metrics dt {
  font-family: var(--ff-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-4);
}
.hero__metrics dd { margin: 0; font-size: 0.94rem; color: var(--text); }

/* Hero — premium visual layer (Phase 2G upgrade).
   Adds an ambient grid, three soft orbs and a small "constellation"
   of nodes around the glass panel. Everything is CSS-only, no
   external assets, and respects prefers-reduced-motion. */
.hero { position: relative; overflow: hidden; }
.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}
.hero__grid {
  position: absolute;
  inset: -2px;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.045) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 70% 70% at 50% 35%, #000 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 70% 70% at 50% 35%, #000 30%, transparent 80%);
  opacity: 0.6;
}
.hero__orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.55;
  animation: hero-orb-drift 18s var(--ease) infinite alternate;
}
.hero__orb--cyan {
  width: 420px; height: 420px;
  background: radial-gradient(circle, rgba(86, 199, 224, 0.55), transparent 70%);
  top: -120px; right: -80px;
}
.hero__orb--violet {
  width: 380px; height: 380px;
  background: radial-gradient(circle, rgba(122, 139, 255, 0.45), transparent 70%);
  bottom: -120px; left: -60px;
  animation-delay: -6s;
}
.hero__orb--blue {
  width: 280px; height: 280px;
  background: radial-gradient(circle, rgba(60, 120, 220, 0.35), transparent 70%);
  top: 30%; left: 40%;
  animation-delay: -12s;
}
@keyframes hero-orb-drift {
  0%   { transform: translate3d(0, 0, 0) scale(1); }
  100% { transform: translate3d(20px, -30px, 0) scale(1.06); }
}
.hero__inner { position: relative; z-index: 1; }
.hero__panel { position: relative; }
.hero__constellation {
  position: absolute;
  inset: -20px;
  pointer-events: none;
  z-index: -1;
}
.hero__node {
  position: absolute;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow:
    0 0 0 1px rgba(122, 139, 255, 0.4),
    0 0 16px 2px rgba(122, 139, 255, 0.5);
  animation: hero-node-pulse 3.6s var(--ease) infinite;
}
.hero__node--1 { top: -10px; left:  20%; animation-delay:  0s; }
.hero__node--2 { top:  30%; right: -16px; animation-delay: -0.7s; background: var(--accent-2); box-shadow: 0 0 0 1px rgba(86, 199, 224, 0.4), 0 0 16px 2px rgba(86, 199, 224, 0.5); }
.hero__node--3 { bottom:  4%; left:  -8px; animation-delay: -1.4s; }
.hero__node--4 { bottom: -14px; right: 30%; animation-delay: -2.1s; background: var(--accent-2); box-shadow: 0 0 0 1px rgba(86, 199, 224, 0.4), 0 0 16px 2px rgba(86, 199, 224, 0.5); }
.hero__node--5 { top:  60%; right: 20%; animation-delay: -2.8s; }
@keyframes hero-node-pulse {
  0%, 100% { opacity: 0.5; transform: scale(1); }
  50%      { opacity: 1.0; transform: scale(1.4); }
}

.hero__trust {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  padding: 0;
  margin: var(--s-2) 0 0;
  font-family: var(--ff-mono);
  font-size: 0.76rem;
  color: var(--text-3);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.hero__trust li { display: inline-flex; align-items: center; gap: 6px; }
.hero__trust-dot {
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px 1px var(--accent-soft);
}

/* ---------- 8. Panel (technical glass surface) ---------- */
.hero__panel { perspective: 1000px; }
.panel {
  background: linear-gradient(180deg, var(--bg-elev-2) 0%, var(--bg-elev-1) 100%);
  border: 1px solid var(--line-2);
  border-radius: var(--r-4);
  overflow: hidden;
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.04) inset,
    0 30px 80px -30px rgba(0, 0, 0, 0.7),
    0 0 0 1px rgba(255, 255, 255, 0.02);
  transform: rotateX(2deg) rotateY(-3deg);
  transform-origin: center center;
  transition: transform var(--t-med) var(--ease);
}
.panel:hover { transform: rotateX(0) rotateY(0); }

/* Glassmorphism variant: a translucent panel that picks up the
   ambient gradient behind it. Used in the hero and the console
   teaser so the page does not feel like a wall of solid cards. */
.panel--glass {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.04) 0%, rgba(255, 255, 255, 0.015) 100%),
    rgba(13, 17, 24, 0.55);
  backdrop-filter: blur(14px) saturate(1.1);
  -webkit-backdrop-filter: blur(14px) saturate(1.1);
  border-color: var(--line-3);
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.06) inset,
    0 30px 80px -30px rgba(0, 0, 0, 0.8),
    0 0 0 1px rgba(122, 139, 255, 0.08);
}
.panel__head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line-1);
  background: rgba(255, 255, 255, 0.02);
  font-family: var(--ff-mono);
  font-size: 0.78rem;
}
.panel__title { color: var(--text-2); }
.panel__status { color: var(--text-3); display: inline-flex; align-items: center; gap: 6px; }
.panel__body { padding: 16px; display: grid; gap: 10px; }
.kv {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.88rem;
  color: var(--text-2);
  padding: 6px 0;
  border-bottom: 1px dashed var(--line-1);
}
.kv:last-of-type { border-bottom: 0; }
.kv--accent { color: var(--text); }
.kv--accent .mono { color: var(--accent); }
.bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 4px;
  margin-top: 8px;
  height: 32px;
  align-items: end;
}
.bar span {
  display: block;
  height: var(--w);
  background: linear-gradient(180deg, var(--accent) 0%, rgba(122, 139, 255, 0.35) 100%);
  border-radius: 2px 2px 0 0;
  opacity: 0.85;
}
.panel__foot {
  padding: 10px 16px;
  border-top: 1px solid var(--line-1);
  color: var(--text-3);
  font-size: 0.78rem;
}

.dot { width: 7px; height: 7px; border-radius: 50%; display: inline-block; }
.dot--ok { background: var(--ok); box-shadow: 0 0 0 3px rgba(77, 208, 138, 0.15); }
.dot--warn { background: var(--warn); box-shadow: 0 0 0 3px rgba(224, 185, 90, 0.15); }
.dot--blue { background: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }

/* ---------- 9. Strip ---------- */
.strip { padding: 28px 0; border-top: 1px solid var(--line-1); border-bottom: 1px solid var(--line-1); background: var(--bg-elev-1); }
.strip__inner { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; }
.pill {
  display: inline-flex;
  align-items: center;
  padding: 6px 12px;
  border: 1px solid var(--line-2);
  background: rgba(255, 255, 255, 0.02);
  border-radius: var(--r-pill);
  font-family: var(--ff-mono);
  font-size: 0.78rem;
  color: var(--text-2);
  letter-spacing: 0.01em;
}

/* ---------- 10. Problem ---------- */
.problem__inner { display: grid; gap: var(--s-6); }
.problem__grid {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: clamp(24px, 4vw, 56px);
  align-items: start;
}
.problem__lead { font-size: clamp(1.02rem, 1.3vw, 1.12rem); color: var(--text-2); }
.problem__list { display: grid; gap: 12px; }
.problem__list li {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  color: var(--text-2);
  font-size: 0.96rem;
  line-height: 1.5;
}
.li-dot {
  flex: 0 0 auto;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  margin-top: 9px;
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.problem__close {
  grid-column: 1 / -1;
  padding: 18px 22px;
  border: 1px solid var(--line-2);
  background: var(--bg-elev-2);
  border-radius: var(--r-3);
  color: var(--text);
  font-size: 1.02rem;
  letter-spacing: -0.01em;
}

/* ---------- 11. Capabilities ---------- */
.cap-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}
.cap-card {
  position: relative;
  background: var(--bg-elev-2);
  border: 1px solid var(--line-2);
  border-radius: var(--r-3);
  padding: 22px 20px 20px;
  display: grid;
  gap: 10px;
  transition: border-color var(--t-fast) var(--ease), background var(--t-fast) var(--ease), transform var(--t-fast) var(--ease);
  min-height: 200px;
}
.cap-card:hover {
  border-color: var(--accent-line);
  background: var(--bg-elev-3);
  transform: translateY(-2px);
}
.cap-card__num {
  font-size: 0.74rem;
  color: var(--text-4);
  letter-spacing: 0.08em;
}
.cap-card h3 { font-size: 1.02rem; letter-spacing: -0.018em; }
.cap-card p { font-size: 0.92rem; color: var(--text-3); line-height: 1.55; }

/* ---------- 12. Architecture / Pipeline ---------- */
.architecture { background: var(--bg-elev-1); }
.pipeline {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  position: relative;
}
.step {
  position: relative;
  background: var(--bg-elev-2);
  border: 1px solid var(--line-2);
  border-radius: var(--r-3);
  padding: 18px 18px 16px;
  display: grid;
  gap: 8px;
  transition: border-color var(--t-fast) var(--ease);
}
.step:hover { border-color: var(--line-3); }
.step__num {
  font-size: 0.72rem;
  color: var(--text-4);
  letter-spacing: 0.08em;
}
.step h4 { font-size: 0.98rem; letter-spacing: -0.015em; }
.step p { font-size: 0.86rem; color: var(--text-3); line-height: 1.5; }
.step--accent {
  background: linear-gradient(180deg, rgba(122, 139, 255, 0.10) 0%, var(--bg-elev-2) 100%);
  border-color: var(--accent-line);
}
.step--accent h4 { color: var(--text); }

/* ---------- 13. Use cases ---------- */
.uc-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}
.uc-card {
  background: var(--bg-elev-2);
  border: 1px solid var(--line-2);
  border-radius: var(--r-3);
  padding: 18px 18px 20px;
  display: grid;
  gap: 8px;
  transition: border-color var(--t-fast) var(--ease), transform var(--t-fast) var(--ease);
}
.uc-card:hover { border-color: var(--line-3); transform: translateY(-1px); }
.uc-card__tag {
  font-size: 0.74rem;
  color: var(--accent);
  letter-spacing: 0.04em;
}
.uc-card p { color: var(--text-2); font-size: 0.94rem; line-height: 1.5; }

/* ---------- 14. Process ---------- */
.process { background: var(--bg-elev-1); }
.process-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}
.process-list li {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 16px;
  background: var(--bg-elev-2);
  border: 1px solid var(--line-2);
  border-radius: var(--r-3);
  padding: 20px 22px;
  align-items: start;
  transition: border-color var(--t-fast) var(--ease);
}
.process-list li:hover { border-color: var(--line-3); }
.process-list__num {
  font-size: 0.78rem;
  color: var(--text-4);
  letter-spacing: 0.08em;
  padding-top: 4px;
  border-right: 1px solid var(--line-1);
  padding-right: 14px;
  text-align: right;
}
.process-list h3 { font-size: 1.02rem; margin-bottom: 6px; }
.process-list p { font-size: 0.94rem; color: var(--text-3); line-height: 1.55; }

/* ---------- 15. Stack ---------- */
.stack-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}
.stack-card {
  background: var(--bg-elev-2);
  border: 1px solid var(--line-2);
  border-radius: var(--r-3);
  padding: 20px 22px 22px;
  display: grid;
  gap: 12px;
}
.stack-card__title {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.86rem;
  font-family: var(--ff-mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-2);
  font-weight: 510;
}
.stack-card ul { display: grid; gap: 6px; }
.stack-card li {
  font-size: 0.92rem;
  color: var(--text-2);
  padding-left: 14px;
  position: relative;
}
.stack-card li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 5px;
  height: 1px;
  background: var(--text-4);
}

/* ---------- 16. Differentiator ---------- */
.diff-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}
.diff-card {
  background: var(--bg-elev-2);
  border: 1px solid var(--line-2);
  border-left: 2px solid var(--accent);
  border-radius: var(--r-3);
  padding: 22px 24px;
  display: grid;
  gap: 8px;
}
.diff-card h3 { font-size: 1.04rem; letter-spacing: -0.018em; }
.diff-card p { color: var(--text-2); font-size: 0.96rem; line-height: 1.55; }

/* ---------- 17. Contact ---------- */
.contact { background: var(--bg-elev-1); border-bottom: 1px solid var(--line-1); }
.contact__inner {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: clamp(40px, 6vw, 72px);
  align-items: center;
}
.contact__copy { display: grid; gap: var(--s-4); }
.contact__copy h2 { text-wrap: balance; max-width: 18ch; }
.contact__copy p { color: var(--text-2); max-width: 50ch; font-size: 1.02rem; }
.contact__copy .btn { width: fit-content; margin-top: 4px; }
.contact__note { color: var(--text-3); font-size: 0.78rem; }
.contact__panel .panel { transform: none; }
.panel__code {
  margin: 0;
  padding: 18px;
  font-family: var(--ff-mono);
  font-size: 0.82rem;
  line-height: 1.65;
  color: var(--text-2);
  white-space: pre;
  overflow-x: auto;
}
.c-key  { color: var(--accent); }
.c-str  { color: var(--accent-2); }
.c-muted{ color: var(--text-4); font-style: italic; }

/* ---------- 18. Footer ---------- */
.site-footer {
  background: var(--bg);
  border-top: 1px solid var(--line-2);
  padding: 56px 0 28px;
}
.site-footer__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 2fr);
  gap: clamp(32px, 5vw, 72px);
  align-items: start;
}
.site-footer__brand { display: grid; gap: 12px; max-width: 320px; }
.site-footer__tag { color: var(--text-3); font-size: 0.9rem; }
.site-footer__nav {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 24px;
}
.site-footer__nav h4 {
  font-size: 0.78rem;
  font-family: var(--ff-mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-3);
  font-weight: 510;
  margin-bottom: 10px;
}
.site-footer__nav a {
  display: block;
  padding: 4px 0;
  color: var(--text-2);
  font-size: 0.9rem;
  transition: color var(--t-fast) var(--ease);
}
.site-footer__nav a:hover { color: var(--text); }
.site-footer__base {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid var(--line-1);
  color: var(--text-3);
  font-size: 0.82rem;
  gap: 16px;
  flex-wrap: wrap;
}

/* ---------- 19. Reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(8px); transition: opacity 600ms var(--ease), transform 600ms var(--ease); }
.reveal.is-in { opacity: 1; transform: none; }

/* ---------- 20. AI features grid (Phase 2G upgrade) ---------- */
.ai-features {
  position: relative;
  padding: clamp(64px, 9vw, 112px) 0;
  border-top: 1px solid var(--line-1);
}
.ai-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--s-4);
  margin-top: var(--s-6);
}
.ai-card {
  position: relative;
  padding: 22px 22px 24px;
  background: linear-gradient(180deg, var(--bg-elev-2) 0%, var(--bg-elev-1) 100%);
  border: 1px solid var(--line-2);
  border-radius: var(--r-3);
  transition: border-color var(--t-med) var(--ease), transform var(--t-med) var(--ease), box-shadow var(--t-med) var(--ease);
}
.ai-card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(135deg, rgba(122, 139, 255, 0.5), transparent 50%, rgba(86, 199, 224, 0.5));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity var(--t-med) var(--ease);
  pointer-events: none;
}
.ai-card:hover {
  transform: translateY(-2px);
  border-color: var(--line-3);
  box-shadow: 0 18px 40px -28px rgba(122, 139, 255, 0.5);
}
.ai-card:hover::before { opacity: 1; }
.ai-card__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px; height: 42px;
  border-radius: var(--r-2);
  background: rgba(122, 139, 255, 0.10);
  color: var(--accent);
  border: 1px solid rgba(122, 139, 255, 0.18);
  margin-bottom: 14px;
  box-shadow: 0 0 24px -8px var(--accent-line);
}
.ai-card h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 6px;
}
.ai-card p {
  color: var(--text-2);
  font-size: 0.92rem;
  line-height: 1.55;
}

/* ---------- 21. Control Center teaser (Phase 2G) ---------- */
.console-teaser {
  position: relative;
  padding: clamp(64px, 9vw, 112px) 0;
  border-top: 1px solid var(--line-1);
  background:
    radial-gradient(ellipse 60rem 30rem at 80% 0%, rgba(122, 139, 255, 0.08), transparent 60%),
    radial-gradient(ellipse 50rem 30rem at 0% 100%, rgba(86, 199, 224, 0.06), transparent 60%);
}
.console-teaser__inner {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: clamp(40px, 6vw, 80px);
  align-items: center;
}
.console-teaser__copy { display: grid; gap: var(--s-4); }
.console-teaser__list {
  display: grid;
  gap: 10px;
  margin-top: var(--s-3);
}
.console-teaser__list li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  color: var(--text-2);
  font-size: 0.95rem;
  line-height: 1.55;
}
.console-teaser__pill {
  flex: 0 0 auto;
  font-family: var(--ff-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent);
  background: rgba(122, 139, 255, 0.10);
  border: 1px solid rgba(122, 139, 255, 0.18);
  padding: 3px 10px;
  border-radius: var(--r-pill);
}
.console-teaser__panel { perspective: 1000px; }
.console-teaser__preview { transform: rotateX(2deg) rotateY(2deg); }
.console-teaser__row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 12px;
  border-radius: var(--r-2);
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--line-1);
  font-size: 0.88rem;
}
.console-teaser__label { color: var(--text-2); font-family: var(--ff-mono); font-size: 0.82rem; }
.console-teaser__metric { display: inline-flex; align-items: center; gap: 6px; color: var(--text); }

/* ---------- 22. CTA banner (Phase 2G) ---------- */
.cta-banner {
  position: relative;
  padding: clamp(64px, 8vw, 96px) 0;
  overflow: hidden;
  border-top: 1px solid var(--line-1);
  background: linear-gradient(180deg, transparent 0%, rgba(122, 139, 255, 0.04) 100%);
}
.cta-banner__bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  z-index: 0;
}
.cta-banner__orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.4;
}
.cta-banner__orb--cyan {
  width: 320px; height: 320px;
  background: radial-gradient(circle, rgba(86, 199, 224, 0.6), transparent 70%);
  top: -80px; right: 5%;
}
.cta-banner__orb--violet {
  width: 280px; height: 280px;
  background: radial-gradient(circle, rgba(122, 139, 255, 0.5), transparent 70%);
  bottom: -100px; left: 10%;
}
.cta-banner__inner {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--s-6);
  flex-wrap: wrap;
}
.cta-banner h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  margin-bottom: 8px;
  background: linear-gradient(96deg, #B7C2FF 0%, #56C7E0 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.cta-banner p {
  color: var(--text-2);
  max-width: 56ch;
  font-size: 1rem;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  .reveal { opacity: 1; transform: none; }
}

/* ---------- 20. Responsive ---------- */
@media (max-width: 1100px) {
  .cap-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .stack-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .uc-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .pipeline { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .process-list { grid-template-columns: 1fr; }
}
@media (max-width: 880px) {
  .topnav { display: none; }
  .topbar__cta { display: none; }
  .nav-toggle { display: inline-block; }

  /* Show mobile nav block (still hidden by [hidden] attribute until opened) */
  .mobile-nav,
  .mobile-nav-overlay { display: block; }

  /* Glassmorphism panel — slides in from right */
  .mobile-nav {
    position: fixed;
    top: 64px;
    right: 0;
    left: 0;
    z-index: 49;
    padding: var(--s-5) var(--gutter) calc(var(--s-6) + env(safe-area-inset-bottom, 0px));
    background: linear-gradient(180deg, rgba(12, 15, 20, 0.86), rgba(7, 9, 12, 0.92));
    backdrop-filter: saturate(140%) blur(18px);
    -webkit-backdrop-filter: saturate(140%) blur(18px);
    border-bottom: 1px solid var(--line-2);
    box-shadow: 0 24px 60px -20px rgba(0, 0, 0, 0.6);
    transform: translateY(-8px);
    opacity: 0;
    pointer-events: none;
    transition: transform var(--t-med) var(--ease), opacity var(--t-med) var(--ease);
    max-height: calc(100svh - 64px);
    overflow-y: auto;
  }
  /* When [hidden] is removed by JS the panel becomes visible & animated */
  .mobile-nav:not([hidden]) {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .mobile-nav__inner {
    display: flex;
    flex-direction: column;
    gap: var(--s-2);
  }
  .mobile-nav__link {
    display: block;
    padding: 14px 14px;
    border-radius: var(--r-2);
    color: var(--text-2);
    font-size: 1rem;
    letter-spacing: -0.01em;
    border: 1px solid transparent;
    transition: color var(--t-fast) var(--ease),
                background var(--t-fast) var(--ease),
                border-color var(--t-fast) var(--ease);
  }
  .mobile-nav__link:hover,
  .mobile-nav__link:focus-visible {
    color: var(--text);
    background: rgba(255, 255, 255, 0.04);
    border-color: var(--line-2);
  }
  .mobile-nav__cta {
    margin-top: var(--s-3);
    justify-content: center;
  }

  .mobile-nav-overlay {
    position: fixed;
    inset: 64px 0 0 0;
    z-index: 48;
    background: radial-gradient(ellipse at top, rgba(0, 0, 0, 0.55), rgba(0, 0, 0, 0.25));
    backdrop-filter: blur(2px);
    -webkit-backdrop-filter: blur(2px);
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--t-med) var(--ease);
  }
  .mobile-nav-overlay:not([hidden]) {
    opacity: 1;
    pointer-events: auto;
  }

  body.nav-open { overflow: hidden; }

  .hero__inner { grid-template-columns: 1fr; }
  .hero__panel { order: 2; }
  .panel { transform: none; }
  .problem__grid { grid-template-columns: 1fr; }
  .diff-grid { grid-template-columns: 1fr; }
  .contact__inner { grid-template-columns: 1fr; }
  .console-teaser__inner { grid-template-columns: 1fr; }
  .console-teaser__preview { transform: none; }
  .cta-banner__inner { flex-direction: column; align-items: flex-start; }
  .site-footer__inner { grid-template-columns: 1fr; }
  .site-footer__nav { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  h1 { font-size: clamp(2.1rem, 9vw, 3rem); }
  .hero { padding-top: 56px; padding-bottom: 56px; }
  section { padding: 56px 0; }
  .cap-grid,
  .uc-grid,
  .stack-grid,
  .pipeline { grid-template-columns: 1fr; }
  .ai-grid { grid-template-columns: 1fr; }
  .step--accent { order: 0; }
  .site-footer__nav { grid-template-columns: 1fr; }
  .site-footer__base { flex-direction: column; align-items: flex-start; }
  .hero__metrics { grid-template-columns: 1fr; gap: var(--s-3); }
  .panel__code { font-size: 0.74rem; }
  .panel__code { white-space: pre-wrap; word-break: break-word; }
  .topbar__inner { min-height: 56px; }
  .btn { width: 100%; justify-content: center; }
  .hero__actions .btn { width: auto; flex: 1 1 auto; }
  .mobile-nav { top: 56px; }
  .mobile-nav-overlay { inset: 56px 0 0 0; }
  .to-top { right: 16px; bottom: 16px; width: 42px; height: 42px; }
}

/* ---------- 21. Back-to-top button (desktop base) ---------- */
.to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 45;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  color: var(--text);
  background: rgba(18, 22, 30, 0.72);
  border: 1px solid var(--line-2);
  backdrop-filter: saturate(140%) blur(12px);
  -webkit-backdrop-filter: saturate(140%) blur(12px);
  box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.6),
              0 0 0 1px rgba(122, 139, 255, 0.05) inset;
  opacity: 0;
  transform: translateY(8px) scale(0.96);
  pointer-events: none;
  transition: opacity var(--t-med) var(--ease),
              transform var(--t-med) var(--ease),
              background var(--t-fast) var(--ease),
              border-color var(--t-fast) var(--ease),
              box-shadow var(--t-fast) var(--ease),
              color var(--t-fast) var(--ease);
}
.to-top.is-visible {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}
.to-top:hover {
  background: rgba(28, 34, 46, 0.85);
  border-color: var(--line-3);
  color: var(--accent-2);
  box-shadow: 0 14px 36px -10px rgba(0, 0, 0, 0.7),
              0 0 24px -6px rgba(86, 199, 224, 0.35);
}
.to-top:active { transform: translateY(0) scale(0.96); }
.to-top svg { display: block; }

@media (prefers-reduced-motion: reduce) {
  .to-top,
  .mobile-nav,
  .mobile-nav-overlay,
  .nav-toggle__bars > span { transition: none !important; }
  .to-top { transform: none; }
}