/* ============================================================
   TPU SYSTEMS INC. — Design System
   Private AI infrastructure · dark-first, secure-compute aesthetic
   Fonts: Cabinet Grotesk (display) · Satoshi (body) · JetBrains Mono (labels)
   ============================================================ */

:root {
  --font-display: 'Cabinet Grotesk', 'Satoshi', 'Helvetica Neue', sans-serif;
  --font-body: 'Satoshi', 'Inter', 'Helvetica Neue', sans-serif;
  --font-mono: 'JetBrains Mono', 'Courier New', monospace;

  /* Type scale */
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl: clamp(2rem, 1.2rem + 2.5vw, 3.5rem);
  --text-3xl: clamp(2.5rem, 1rem + 4vw, 5rem);

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

  --content-default: 1120px;
  --content-wide: 1240px;
  --content-narrow: 720px;

  --radius-sm: 0.375rem; --radius-md: 0.5rem;
  --radius-lg: 0.75rem; --radius-xl: 1rem;

  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  --header-h: 72px;
}

/* ---------- LIGHT (default from system) ---------- */
:root,
[data-theme='light'] {
  color-scheme: light;
  --color-bg: #f4f6f7;
  --color-surface: #ffffff;
  --color-surface-2: #eef1f3;
  --color-surface-offset: #e9edef;
  --color-divider: #dde3e7;
  --color-border: #c9d2d8;
  --color-text: #16232c;
  --color-text-muted: #51616d;
  --color-text-faint: #7e8d98;
  --color-text-inverse: #f4f8fa;

  --color-accent: #0a7a72;
  --color-accent-hover: #075f59;
  --color-accent-bright: #0d948a;
  --color-accent-soft: rgba(10, 122, 114, 0.10);
  --color-accent-contrast: #ffffff;

  --shadow-sm: 0 1px 2px rgba(18, 34, 43, 0.07);
  --shadow-md: 0 4px 14px rgba(18, 34, 43, 0.09);
  --shadow-lg: 0 16px 40px rgba(18, 34, 43, 0.14);

  --tile-bg: #0e1519; /* product image tile — always dark */
  --hero-overlay: linear-gradient(100deg, rgba(9,14,17,0.96) 0%, rgba(9,14,17,0.82) 38%, rgba(9,14,17,0.35) 72%, rgba(9,14,17,0.55) 100%);
}

/* ---------- DARK ---------- */
[data-theme='dark'] {
  color-scheme: dark;
  --color-bg: #0c1216;
  --color-surface: #111a20;
  --color-surface-2: #16212a;
  --color-surface-offset: #0f171d;
  --color-divider: #1e2a33;
  --color-border: #2b3a45;
  --color-text: #e4eaee;
  --color-text-muted: #93a3ad;
  --color-text-faint: #5d6d78;
  --color-text-inverse: #0c1216;

  --color-accent: #45c4b4;
  --color-accent-hover: #6fd8ca;
  --color-accent-bright: #45c4b4;
  --color-accent-soft: rgba(69, 196, 180, 0.12);
  --color-accent-contrast: #06211d;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.35);
  --shadow-md: 0 4px 14px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.5);

  --tile-bg: #0e1519;
  --hero-overlay: linear-gradient(100deg, rgba(9,14,17,0.96) 0%, rgba(9,14,17,0.82) 38%, rgba(9,14,17,0.3) 72%, rgba(9,14,17,0.5) 100%);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    color-scheme: dark;
    --color-bg: #0c1216;
    --color-surface: #111a20;
    --color-surface-2: #16212a;
    --color-surface-offset: #0f171d;
    --color-divider: #1e2a33;
    --color-border: #2b3a45;
    --color-text: #e4eaee;
    --color-text-muted: #93a3ad;
    --color-text-faint: #5d6d78;
    --color-text-inverse: #0c1216;
    --color-accent: #45c4b4;
    --color-accent-hover: #6fd8ca;
    --color-accent-bright: #45c4b4;
    --color-accent-soft: rgba(69, 196, 180, 0.12);
    --color-accent-contrast: #06211d;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.35);
    --shadow-md: 0 4px 14px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.5);
  }
}

/* ============================================================ BASE */

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  -moz-text-size-adjust: none;
  -webkit-text-size-adjust: none;
  text-size-adjust: none;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
  hanging-punctuation: first last;
  scroll-padding-top: calc(var(--header-h) + 16px);
}

body {
  min-height: 100dvh;
  line-height: 1.6;
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  background-color: var(--color-bg);
}

img, picture, video, canvas, svg { display: block; max-width: 100%; height: auto; }
ul[role='list'], ol[role='list'] { list-style: none; }
input, button, textarea, select { font: inherit; color: inherit; }

h1, h2, h3, h4, h5, h6 {
  text-wrap: balance;
  line-height: 1.12;
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.015em;
}

p, li, figcaption { text-wrap: pretty; }

::selection { background: var(--color-accent-soft); color: var(--color-text); }

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: var(--radius-sm);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

button { cursor: pointer; background: none; border: none; }
table { border-collapse: collapse; width: 100%; }

a, button, [role='button'], [role='link'], input, textarea, select {
  transition: color var(--transition-interactive),
    background var(--transition-interactive),
    border-color var(--transition-interactive),
    box-shadow var(--transition-interactive);
}

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

/* ============================================================ LAYOUT PRIMITIVES */

.container {
  width: min(var(--content-default), 100% - 3rem);
  margin-inline: auto;
}
.container--wide { width: min(var(--content-wide), 100% - 2.5rem); }
.container--narrow { width: min(var(--content-narrow), 100% - 3rem); }

.section { padding-block: clamp(var(--space-12), 7vw, var(--space-24)); }
.section--tight { padding-block: clamp(var(--space-10), 5vw, var(--space-16)); }

.section-head { max-width: 760px; margin-bottom: clamp(var(--space-8), 4vw, var(--space-12)); }
.section-head--center { margin-inline: auto; text-align: center; }

.eyebrow {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--color-accent);
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}
.eyebrow::before {
  content: '';
  display: inline-block;
  width: 22px; height: 2px;
  background: var(--color-accent);
}

.section-title { font-size: var(--text-xl); margin-bottom: var(--space-4); }
.section-lead { color: var(--color-text-muted); font-size: var(--text-lg); line-height: 1.55; }

/* ============================================================ HEADER */

.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in oklab, var(--color-bg) 88%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition-interactive), box-shadow var(--transition-interactive);
}
.header--scrolled { border-bottom-color: var(--color-divider); box-shadow: var(--shadow-sm); }

.header__inner {
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
}

.brand { display: inline-flex; align-items: center; gap: var(--space-3); text-decoration: none; color: var(--color-text); }
.brand__mark { width: 38px; height: 38px; flex: none; }
.brand__name { font-family: var(--font-display); font-weight: 800; font-size: 1.14rem; letter-spacing: 0.01em; line-height: 1.05; }
.brand__name small { display: block; font-family: var(--font-mono); font-weight: 500; font-size: 0.58rem; letter-spacing: 0.32em; text-transform: uppercase; color: var(--color-text-muted); margin-top: 2px; }

.nav { display: flex; align-items: center; gap: var(--space-1); }
.nav__link {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
}
.nav__link:hover, .nav__link[aria-current='page'] { color: var(--color-text); background: var(--color-surface-2); }

.header__actions { display: flex; align-items: center; gap: var(--space-3); }

.theme-toggle {
  width: 40px; height: 40px;
  display: grid; place-items: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  background: var(--color-surface);
}
.theme-toggle:hover { color: var(--color-text); border-color: var(--color-accent); }

.nav-toggle {
  display: none;
  width: 40px; height: 40px;
  place-items: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text);
  background: var(--color-surface);
}

@media (max-width: 900px) {
  .nav {
    position: fixed;
    inset: var(--header-h) 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-divider);
    padding: var(--space-4);
    gap: var(--space-1);
    transform: translateY(-8px);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: opacity 160ms ease, transform 160ms ease, visibility 160ms;
  }
  .nav[data-open='true'] { transform: translateY(0); opacity: 1; visibility: visible; pointer-events: auto; }
  .nav__link { padding: var(--space-3) var(--space-4); font-size: var(--text-base); }
  .nav-toggle { display: grid; }
  .header__actions .header__cta { display: none; }
  html.nav-open::after {
    content: '';
    position: fixed;
    inset: var(--header-h) 0 0 0;
    background: rgba(5, 9, 12, 0.55);
    z-index: 40;
  }
}

/* ============================================================ BUTTONS */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 700;
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  text-decoration: none;
  border: 1px solid transparent;
  white-space: nowrap;
}
.btn--primary {
  background: var(--color-accent);
  color: var(--color-accent-contrast);
}
.btn--primary:hover { background: var(--color-accent-hover); box-shadow: var(--shadow-md); }
.btn--ghost {
  border-color: var(--color-border);
  color: var(--color-text);
  background: var(--color-surface);
}
.btn--ghost:hover { border-color: var(--color-accent); color: var(--color-accent); }
.btn--light {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.35);
  color: #fff;
}
.btn--light:hover { background: rgba(255, 255, 255, 0.16); border-color: #fff; }
.btn--lg { padding: var(--space-4) var(--space-8); font-size: var(--text-base); }
.btn--sm { padding: var(--space-2) var(--space-4); }

.arrow { transition: transform var(--transition-interactive); }
.btn:hover .arrow { transform: translateX(3px); }

/* ============================================================ HERO */

.hero {
  position: relative;
  background: #090e11;
  color: #f2f6f8;
  overflow: hidden;
}
.hero__bg {
  position: absolute;
  inset: 0;
  background-image: var(--hero-overlay), url('../images/hero-infrastructure.webp');
  background-size: cover;
  background-position: center 40%;
}
.hero__inner {
  position: relative;
  padding-block: clamp(var(--space-16), 10vw, var(--space-24)) clamp(var(--space-16), 9vw, var(--space-20));
  max-width: 640px;
}
.hero__title {
  font-size: var(--text-2xl);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: var(--space-6);
  color: #ffffff;
}
.hero__title em { font-style: normal; color: var(--color-accent); }
.hero__text {
  color: rgba(230, 240, 244, 0.85);
  font-size: var(--text-lg);
  line-height: 1.55;
  margin-bottom: var(--space-8);
  max-width: 56ch;
}
.hero__actions { display: flex; flex-wrap: wrap; gap: var(--space-4); margin-bottom: var(--space-10); }

.hero__stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1px;
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.hero__stat {
  background: rgba(9, 14, 17, 0.72);
  padding: var(--space-4) var(--space-5);
  backdrop-filter: blur(6px);
}
.hero__stat strong { display: block; font-family: var(--font-display); font-size: var(--text-lg); font-weight: 800; color: var(--color-accent); margin-bottom: 2px; }
.hero__stat span { font-size: var(--text-xs); color: rgba(230, 240, 244, 0.75); letter-spacing: 0.02em; }

/* ============================================================ GENERIC GRIDS & CARDS */

.grid { display: grid; gap: var(--space-6); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 1020px) { .grid--4 { grid-template-columns: repeat(2, 1fr); } .grid--3 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; } }

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  transition: border-color var(--transition-interactive), box-shadow var(--transition-interactive), transform var(--transition-interactive);
}
.card:hover { border-color: var(--color-accent); box-shadow: var(--shadow-md); transform: translateY(-2px); }

.card__icon {
  width: 44px; height: 44px;
  display: grid; place-items: center;
  border-radius: var(--radius-md);
  background: var(--color-accent-soft);
  color: var(--color-accent);
  margin-bottom: var(--space-4);
}
.card__icon svg { width: 22px; height: 22px; }
.card__title { font-size: var(--text-lg); font-weight: 700; margin-bottom: var(--space-2); }
.card__text { color: var(--color-text-muted); font-size: var(--text-sm); line-height: 1.6; }
.card__link { display: inline-flex; align-items: center; gap: var(--space-2); font-size: var(--text-sm); font-weight: 700; color: var(--color-accent); text-decoration: none; margin-top: var(--space-4); }
.card__link:hover { gap: var(--space-3); }

/* Feature band with image */
.split {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: clamp(var(--space-8), 5vw, var(--space-16));
  align-items: center;
}
.split--reverse > .split__media { order: -1; }
@media (max-width: 880px) {
  .split { grid-template-columns: 1fr; }
  .split--reverse > .split__media { order: 0; }
}
.split__media img { border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); width: 100%; }

/* ============================================================ PRODUCT CARDS */

.product-card {
  display: flex;
  flex-direction: column;
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--transition-interactive), box-shadow var(--transition-interactive);
}
.product-card:hover { border-color: var(--color-accent); box-shadow: var(--shadow-lg); }

.product-card__tile {
  background: var(--tile-bg);
  aspect-ratio: 4 / 3;
  display: grid;
  place-items: center;
  padding: var(--space-6);
  overflow: hidden;
}
.product-card__tile img {
  max-height: 100%;
  width: auto;
  max-width: 100%;
  object-fit: contain;
  filter: drop-shadow(0 10px 24px rgba(0, 0, 0, 0.55));
  transition: transform 420ms cubic-bezier(0.16, 1, 0.3, 1);
}
.product-card:hover .product-card__tile img { transform: scale(1.045) translateY(-3px); }

.product-card__body { padding: var(--space-6); display: flex; flex-direction: column; flex: 1; }
.product-card__name { font-family: var(--font-mono); font-size: var(--text-xs); text-transform: uppercase; letter-spacing: 0.12em; color: var(--color-accent); margin-bottom: var(--space-2); }
.product-card__title { font-size: var(--text-lg); margin-bottom: var(--space-2); }
.product-card__text { color: var(--color-text-muted); font-size: var(--text-sm); line-height: 1.6; flex: 1; }
.product-card__tags { display: flex; flex-wrap: wrap; gap: var(--space-2); margin-top: var(--space-4); }

.tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.04em;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
}

/* Full product feature block */
.product-block {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: clamp(var(--space-8), 4vw, var(--space-12));
  align-items: start;
  padding-block: clamp(var(--space-10), 6vw, var(--space-16));
  border-top: 1px solid var(--color-divider);
}
.product-block:first-of-type { border-top: none; padding-top: 0; }
@media (max-width: 880px) { .product-block { grid-template-columns: 1fr; } }

.product-block__media {
  background: var(--tile-bg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-divider);
  padding: var(--space-8);
  position: sticky;
  top: calc(var(--header-h) + 24px);
}
@media (max-width: 880px) { .product-block__media { position: static; } }
.product-block__media img { width: 100%; object-fit: contain; filter: drop-shadow(0 14px 30px rgba(0, 0, 0, 0.5)); }

.product-block__header { display: flex; flex-wrap: wrap; align-items: baseline; gap: var(--space-3); margin-bottom: var(--space-3); }
.product-block__header h3 { font-size: var(--text-xl); }
.product-block__sub { font-family: var(--font-mono); font-size: var(--text-xs); color: var(--color-accent); letter-spacing: 0.06em; }
.product-block__text { color: var(--color-text-muted); margin-bottom: var(--space-5); max-width: 62ch; }

.spec-list { display: grid; gap: 0; border: 1px solid var(--color-divider); border-radius: var(--radius-lg); overflow: hidden; margin-bottom: var(--space-6); }
.spec-list__row {
  display: grid;
  grid-template-columns: minmax(130px, 38%) 1fr;
  gap: var(--space-4);
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  border-bottom: 1px solid var(--color-divider);
  background: var(--color-surface);
}
.spec-list__row:last-child { border-bottom: none; }
.spec-list__row dt { font-family: var(--font-mono); font-size: 0.75rem; color: var(--color-text-muted); letter-spacing: 0.02em; padding-top: 2px; }
.spec-list__row dd { color: var(--color-text); }
@media (max-width: 520px) {
  .spec-list__row { grid-template-columns: 1fr; gap: 2px; }
}

.fit-note {
  background: var(--color-accent-soft);
  border: 1px solid color-mix(in oklab, var(--color-accent) 35%, transparent);
  border-radius: var(--radius-md);
  padding: var(--space-4) var(--space-5);
  font-size: var(--text-sm);
  color: var(--color-text);
}
.fit-note strong { color: var(--color-accent); font-family: var(--font-mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.1em; display: block; margin-bottom: var(--space-1); }

/* ============================================================ STEPS */

.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-6); counter-reset: step; }
@media (max-width: 1020px) { .steps { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .steps { grid-template-columns: 1fr; } }

.step { position: relative; padding-top: var(--space-2); }
.step::before {
  counter-increment: step;
  content: '0' counter(step);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-accent);
  display: inline-block;
  margin-bottom: var(--space-3);
  padding-bottom: var(--space-3);
  border-bottom: 2px solid var(--color-accent);
  letter-spacing: 0.1em;
}
.step h3 { font-size: var(--text-lg); margin-bottom: var(--space-2); }
.step p { color: var(--color-text-muted); font-size: var(--text-sm); line-height: 1.65; }

/* ============================================================ PROBLEM/SOLUTION BAND */

.band {
  background: var(--color-surface-offset);
  border-block: 1px solid var(--color-divider);
}

.contrast-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-6); }
@media (max-width: 880px) { .contrast-grid { grid-template-columns: 1fr; } }

.contrast-card { border-radius: var(--radius-lg); padding: var(--space-8); border: 1px solid var(--color-divider); }
.contrast-card--bad { background: var(--color-surface); }
.contrast-card--good { background: #0e1519; color: #e4eaee; border-color: #1e2a33; }
.contrast-card--good h3 { color: #fff; }
.contrast-card--good p, .contrast-card--good li { color: #93a3ad; }

.contrast-card h3 { font-size: var(--text-lg); margin-bottom: var(--space-5); display: flex; align-items: center; gap: var(--space-3); }
.contrast-card ul { display: grid; gap: var(--space-3); }
.contrast-card li { font-size: var(--text-sm); line-height: 1.6; padding-left: var(--space-6); position: relative; color: var(--color-text-muted); }
.contrast-card li::before {
  position: absolute; left: 0; top: 1px;
  font-weight: 700;
  color: var(--color-text-faint);
}
.contrast-card--bad li::before { content: '×'; color: #b4574a; }
.contrast-card--good li::before { content: '→'; color: var(--color-accent); }

/* ============================================================ CHECKLIST / VALUE ROWS */

.value-rows { display: grid; gap: var(--space-4); }
.value-row {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--space-4);
  align-items: start;
  padding: var(--space-5);
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
}
.value-row svg { width: 24px; height: 24px; color: var(--color-accent); flex: none; margin-top: 2px; }
.value-row h3 { font-size: var(--text-base); font-weight: 700; margin-bottom: var(--space-1); }
.value-row p { font-size: var(--text-sm); color: var(--color-text-muted); line-height: 1.6; }

/* ============================================================ PRICING */

.pricing-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-6); align-items: stretch; }
@media (max-width: 980px) { .pricing-grid { grid-template-columns: 1fr; } }

.price-card {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  position: relative;
}
.price-card--featured {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-md);
}
.price-card--featured::after {
  content: 'Most popular';
  position: absolute;
  top: -13px; left: var(--space-6);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-accent-contrast);
  background: var(--color-accent);
  border-radius: var(--radius-full);
  padding: 4px 12px;
  box-shadow: var(--shadow-sm);
}
.price-card h3 { font-size: var(--text-lg); margin-bottom: var(--space-2); }
.price-card__desc { font-size: var(--text-sm); color: var(--color-text-muted); margin-bottom: var(--space-6); line-height: 1.6; }
.price-card__price { font-family: var(--font-display); font-size: var(--text-xl); font-weight: 800; color: var(--color-text); margin-bottom: var(--space-2); }
.price-card__price small { display: block; font-family: var(--font-body); font-weight: 400; font-size: var(--text-sm); color: var(--color-text-muted); margin-top: var(--space-1); }
.price-card ul { display: grid; gap: var(--space-3); margin-bottom: var(--space-8); }
.price-card li { font-size: var(--text-sm); color: var(--color-text-muted); padding-left: var(--space-6); position: relative; line-height: 1.55; }
.price-card li::before { content: '✓'; position: absolute; left: 0; color: var(--color-accent); font-weight: 700; }
.price-card .btn { margin-top: auto; }

/* ============================================================ FAQ */

.faq-item { border-bottom: 1px solid var(--color-divider); }
.faq-item:last-child { border-bottom: none; }
.faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  text-align: left;
  padding: var(--space-5) 0;
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--color-text);
}
.faq-q::after {
  content: '+';
  font-family: var(--font-mono);
  font-size: var(--text-lg);
  color: var(--color-accent);
  flex: none;
  transition: transform var(--transition-interactive);
}
.faq-item[data-open='true'] .faq-q::after { transform: rotate(45deg); }
.faq-a { display: none; padding-bottom: var(--space-5); color: var(--color-text-muted); font-size: var(--text-sm); line-height: 1.65; max-width: 68ch; }
.faq-item[data-open='true'] .faq-a { display: block; }

/* ============================================================ CONTACT */

.contact-grid { display: grid; grid-template-columns: 0.85fr 1.15fr; gap: clamp(var(--space-8), 5vw, var(--space-16)); }
@media (max-width: 880px) { .contact-grid { grid-template-columns: 1fr; } }

.contact-detail { display: grid; gap: var(--space-5); }
.contact-detail__item { display: grid; grid-template-columns: auto 1fr; gap: var(--space-4); align-items: start; }
.contact-detail__item svg { width: 20px; height: 20px; color: var(--color-accent); margin-top: 3px; }
.contact-detail__item h3 { font-size: var(--text-sm); font-family: var(--font-mono); text-transform: uppercase; letter-spacing: 0.1em; color: var(--color-text-muted); margin-bottom: var(--space-1); font-weight: 500; }
.contact-detail__item p, .contact-detail__item a { font-size: var(--text-base); color: var(--color-text); text-decoration: none; line-height: 1.5; }
.contact-detail__item a:hover { color: var(--color-accent); }

.form { display: grid; gap: var(--space-5); background: var(--color-surface); border: 1px solid var(--color-divider); border-radius: var(--radius-lg); padding: clamp(var(--space-6), 4vw, var(--space-10)); }
.form__row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-5); }
@media (max-width: 640px) { .form__row { grid-template-columns: 1fr; } }
.form label { display: grid; gap: var(--space-2); font-size: var(--text-sm); font-weight: 600; }
.form input, .form textarea, .form select {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-base);
  color: var(--color-text);
  width: 100%;
}
.form select { padding-right: var(--space-8); }
.form input:focus, .form textarea:focus, .form select:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 0;
  border-color: var(--color-accent);
}
.form textarea { min-height: 140px; resize: vertical; }
.form__note { font-size: var(--text-xs); color: var(--color-text-faint); }

/* ============================================================ TABLES */

.table-wrap { overflow-x: auto; border: 1px solid var(--color-divider); border-radius: var(--radius-lg); }
.data-table { min-width: 640px; font-size: var(--text-sm); background: var(--color-surface); }
.data-table th {
  text-align: left;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
  font-weight: 500;
  padding: var(--space-4);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-surface-2);
}
.data-table td { padding: var(--space-4); border-bottom: 1px solid var(--color-divider); color: var(--color-text); vertical-align: top; }
.data-table tr:last-child td { border-bottom: none; }
.data-table td:first-child { font-weight: 700; }

/* ============================================================ CTA BAND */

.cta-band {
  background:
    linear-gradient(rgba(10, 18, 22, 0.88), rgba(10, 18, 22, 0.94)),
    url('../images/hero-infrastructure.webp') center 30% / cover;
  color: #e8eff2;
  border-radius: var(--radius-xl);
  padding: clamp(var(--space-10), 6vw, var(--space-16));
  text-align: center;
}
.cta-band h2 { color: #fff; font-size: var(--text-xl); max-width: 22ch; margin-inline: auto; margin-bottom: var(--space-4); }
.cta-band p { color: rgba(214, 226, 232, 0.8); max-width: 56ch; margin-inline: auto; margin-bottom: var(--space-8); }
.cta-band__actions { display: flex; flex-wrap: wrap; gap: var(--space-4); justify-content: center; }

/* ============================================================ FOOTER */

.footer { border-top: 1px solid var(--color-divider); background: var(--color-surface-offset); margin-top: var(--space-16); }
.footer__grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: var(--space-8);
  padding-block: var(--space-12);
}
@media (max-width: 900px) { .footer__grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .footer__grid { grid-template-columns: 1fr; } }
.footer__about p { font-size: var(--text-sm); color: var(--color-text-muted); margin-top: var(--space-4); max-width: 34ch; line-height: 1.6; }
.footer h3 { font-family: var(--font-mono); font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.14em; color: var(--color-text-faint); font-weight: 500; margin-bottom: var(--space-4); }
.footer__links { display: grid; gap: var(--space-3); }
.footer__links a { font-size: var(--text-sm); color: var(--color-text-muted); text-decoration: none; }
.footer__links a:hover { color: var(--color-accent); }
.footer__contact { font-size: var(--text-sm); color: var(--color-text-muted); display: grid; gap: var(--space-3); line-height: 1.55; font-style: normal; }
.footer__contact a { color: var(--color-text-muted); text-decoration: none; }
.footer__contact a:hover { color: var(--color-accent); }
.footer__bottom {
  border-top: 1px solid var(--color-divider);
  padding-block: var(--space-5);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  justify-content: space-between;
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}
.footer__bottom a { color: var(--color-text-faint); text-decoration: none; }
.footer__bottom a:hover { color: var(--color-accent); }

/* ============================================================ PAGE HERO (interior) */

.page-hero {
  background: #090e11;
  color: #eef4f6;
  position: relative;
  overflow: hidden;
}
.page-hero__inner { padding-block: clamp(var(--space-12), 7vw, var(--space-16)); max-width: 720px; position: relative; }
.page-hero .eyebrow { color: var(--color-accent); }
.page-hero h1 { font-size: var(--text-2xl); color: #fff; margin-bottom: var(--space-5); letter-spacing: -0.02em; }
.page-hero p { color: rgba(222, 234, 240, 0.82); font-size: var(--text-lg); line-height: 1.55; max-width: 58ch; }
.page-hero::after {
  content: '';
  position: absolute;
  right: -140px; top: 50%;
  width: 480px; height: 480px;
  border-radius: 50%;
  border: 1px solid rgba(69, 196, 180, 0.22);
  transform: translateY(-50%);
  pointer-events: none;
}
.page-hero::before {
  content: '';
  position: absolute;
  right: -40px; top: 50%;
  width: 480px; height: 480px;
  border-radius: 50%;
  border: 1px dashed rgba(69, 196, 180, 0.14);
  transform: translateY(-50%);
  pointer-events: none;
}

/* breadcrumb */
.breadcrumb { font-family: var(--font-mono); font-size: var(--text-xs); color: var(--color-text-faint); margin-bottom: var(--space-4); }
.breadcrumb a { color: var(--color-text-muted); text-decoration: none; }
.breadcrumb a:hover { color: var(--color-accent); }

/* ============================================================ REVEAL ANIMATION */

.reveal { opacity: 0; transform: translateY(18px); transition: opacity 560ms cubic-bezier(0.16, 1, 0.3, 1), transform 560ms cubic-bezier(0.16, 1, 0.3, 1); }
.reveal--in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; } }

/* ============================================================ MISC */

.note-source { font-size: var(--text-xs); color: var(--color-text-faint); line-height: 1.6; }
.note-source a { color: var(--color-text-muted); }

.kbd-chip {
  display: inline-flex; align-items: center; gap: var(--space-2);
  font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--color-accent);
  border: 1px solid color-mix(in oklab, var(--color-accent) 40%, transparent);
  border-radius: var(--radius-full); padding: 5px 14px;
  background: var(--color-accent-soft);
}