/* =========================================================
   Infra Services: stylesheet
   Calm & premium: warm paper, deep navy ink, one copper accent.
   Newsreader for display type, Geist for text, Geist Mono for labels.
   Light and dark themes via <html data-theme="light|dark">.
   ========================================================= */

/* ---------- Tokens ---------- */

:root {
  --font-sans: "Geist", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-serif: "Newsreader", Georgia, "Times New Roman", serif;
  --font-mono: "Geist Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --container: 1160px;
  --gutter: clamp(20px, 4vw, 40px);
  --section-space: clamp(80px, 10vw, 136px);
  --header-height: 68px;

  --radius-sm: 10px;
  --radius: 16px;
  --radius-lg: 22px;
  --radius-pill: 999px;

  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
  --fast: 0.18s var(--ease);
  --slow: 0.6s var(--ease);
}

:root,
[data-theme="light"] {
  --paper: #f5f2eb;
  --paper-2: #ede8de;
  --surface: #fffcf7;
  --surface-2: #f8f5ef;

  --ink: #0f1a2c;
  --ink-2: #3e4859;
  --ink-3: #6b7382;
  --on-ink: #f8f5ef;

  --line: rgba(15, 26, 44, 0.1);
  --line-2: rgba(15, 26, 44, 0.18);

  --accent: #a0502a;
  --accent-strong: #8a4322;
  --accent-soft: rgba(160, 80, 42, 0.1);

  --m-systems: #2f4e7e;
  --m-monitoring: #2f7553;
  --m-security: #8e3b46;
  --m-ai: #6a4fa3;

  --danger: #a3343f;
  --success: #2f7553;

  --header-bg: rgba(245, 242, 235, 0.82);
  --shadow: 0 1px 2px rgba(15, 26, 44, 0.04), 0 12px 32px -12px rgba(15, 26, 44, 0.14);
  --shadow-lg: 0 2px 6px rgba(15, 26, 44, 0.05), 0 28px 60px -24px rgba(15, 26, 44, 0.22);

  --select-arrow: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1.5l5 5 5-5' fill='none' stroke='%233e4859' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  color-scheme: light;
}

[data-theme="dark"] {
  --paper: #0c1320;
  --paper-2: #101a2b;
  --surface: #131d2f;
  --surface-2: #172236;

  --ink: #eee9df;
  --ink-2: #bcc2cc;
  --ink-3: #8c95a4;
  --on-ink: #0c1320;

  --line: rgba(238, 233, 223, 0.1);
  --line-2: rgba(238, 233, 223, 0.18);

  --accent: #e39a6b;
  --accent-strong: #f0b288;
  --accent-soft: rgba(227, 154, 107, 0.14);

  --m-systems: #8fb0e3;
  --m-monitoring: #7fc4a0;
  --m-security: #e38d97;
  --m-ai: #b39bea;

  --danger: #f08c96;
  --success: #7fc4a0;

  --header-bg: rgba(12, 19, 32, 0.8);
  --shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 12px 32px -12px rgba(0, 0, 0, 0.55);
  --shadow-lg: 0 2px 6px rgba(0, 0, 0, 0.3), 0 28px 60px -24px rgba(0, 0, 0, 0.65);

  --select-arrow: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1.5l5 5 5-5' fill='none' stroke='%23bcc2cc' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
  color-scheme: dark;
}

/* Module colours, picked up wherever data-module is set. */
[data-module="systems"] { --mod: var(--m-systems); }
[data-module="monitoring"] { --mod: var(--m-monitoring); }
[data-module="security"] { --mod: var(--m-security); }
[data-module="ai"] { --mod: var(--m-ai); }

/* ---------- Base ---------- */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: auto;
}

body {
  /* Hidden popups near the right edge must not make the page scroll
     sideways. "clip" (unlike "hidden") keeps the sticky header working. */
  overflow-x: clip;
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  transition: background-color var(--fast), color var(--fast);
}

/* Closed popups near the right edge (chips, module info) still take up
   layout room; clip them here too, so they never widen the page. */
main {
  overflow-x: clip;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul,
ol {
  list-style: none;
}

button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
}

strong {
  font-weight: 600;
  color: var(--ink);
}

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

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 6px;
}

section[id],
[id^="module-"],
.anchor-alias {
  scroll-margin-top: calc(var(--header-height) + 16px);
}

.anchor-alias {
  display: block;
  height: 0;
}

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* ---------- Type ---------- */

.display,
.service-hero h1,
.service-content h2,
.service-cta-box h3 {
  font-family: var(--font-serif);
  font-weight: 400;
  letter-spacing: -0.015em;
  color: var(--ink);
  font-optical-sizing: auto;
}

h1.display {
  font-size: clamp(2.7rem, 5.6vw, 4.6rem);
  line-height: 1.02;
  letter-spacing: -0.025em;
}

h2.display {
  font-size: clamp(2.05rem, 3.8vw, 3.1rem);
  line-height: 1.08;
}

.display em,
.accent-text {
  font-family: var(--font-serif);
  font-style: italic;
  color: var(--accent);
}

.eyebrow,
.hero-eyebrow {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 18px;
}

.section-intro {
  font-size: 1.12rem;
  color: var(--ink-2);
  max-width: 640px;
  margin-top: 18px;
}

mark.todo {
  background: rgba(232, 179, 58, 0.28);
  outline: 1px dashed #b8860b;
  outline-offset: 1px;
  border-radius: 4px;
  padding: 0 0.2em;
  color: inherit;
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 48px;
  padding: 12px 24px;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  font-size: 15.5px;
  font-weight: 500;
  line-height: 1.2;
  cursor: pointer;
  white-space: nowrap;
  transition: background-color var(--fast), border-color var(--fast), color var(--fast), transform var(--fast);
}

.btn.primary {
  background: var(--ink);
  color: var(--on-ink);
}

.btn.primary:hover {
  background: var(--accent-strong);
  color: #fff8f2;
  transform: translateY(-1px);
}

.btn.secondary {
  background: transparent;
  color: var(--ink);
  border-color: var(--line-2);
}

.btn.secondary:hover {
  border-color: var(--ink);
  transform: translateY(-1px);
}

.btn:disabled {
  opacity: 0.6;
  cursor: progress;
  transform: none;
}

.btn-sm {
  min-height: 38px;
  padding: 8px 16px;
  font-size: 14px;
}

.cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

/* ---------- Header ---------- */

.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--header-bg);
  -webkit-backdrop-filter: saturate(140%) blur(14px);
  backdrop-filter: saturate(140%) blur(14px);
  border-bottom: 1px solid var(--line);
  transition: transform 0.25s var(--ease), background-color var(--fast);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 28px;
  min-height: var(--header-height);
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  font-size: 16.5px;
  letter-spacing: -0.01em;
  color: var(--ink);
  white-space: nowrap;
}

.logo-mark {
  width: 22px;
  height: 22px;
}

.logo-mark .lm-top {
  fill: var(--accent);
}

.logo-mark .lm-mid {
  fill: var(--ink);
  opacity: 0.5;
}

.logo-mark .lm-base {
  fill: var(--ink);
}

.main-nav {
  display: flex;
  gap: 26px;
  margin-left: auto;
}

.main-nav a {
  font-size: 15px;
  color: var(--ink-2);
  transition: color var(--fast);
}

.main-nav a:hover {
  color: var(--ink);
}

.header-tools {
  display: flex;
  align-items: center;
  gap: 14px;
}

.language-picker {
  display: flex;
  gap: 2px;
  font-family: var(--font-mono);
  font-size: 12.5px;
}

.language-picker a {
  padding: 4px 6px;
  border-radius: 6px;
  color: var(--ink-3);
  transition: color var(--fast), background-color var(--fast);
}

.language-picker a:hover {
  color: var(--ink);
}

.language-picker a.active {
  color: var(--ink);
  background: var(--accent-soft);
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid var(--line-2);
  background: transparent;
  color: var(--ink-2);
  cursor: pointer;
  transition: color var(--fast), border-color var(--fast);
}

.theme-toggle:hover {
  color: var(--ink);
  border-color: var(--ink);
}

.theme-toggle svg {
  width: 16px;
  height: 16px;
}

.theme-toggle .icon-sun,
[data-theme="dark"] .theme-toggle .icon-moon {
  display: none;
}

[data-theme="dark"] .theme-toggle .icon-sun {
  display: block;
}

/* ---------- Home: hero ---------- */

.hero {
  position: relative;
  padding: clamp(56px, 8vw, 104px) 0 clamp(72px, 9vw, 120px);
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: -20% -10% auto auto;
  width: 60%;
  height: 120%;
  background: radial-gradient(closest-side, var(--accent-soft), transparent 70%);
  pointer-events: none;
  opacity: 0.8;
}

.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: clamp(40px, 6vw, 88px);
  align-items: center;
}

.hero-lead {
  font-size: clamp(1.1rem, 1.6vw, 1.25rem);
  color: var(--ink-2);
  max-width: 560px;
  margin-top: 26px;
}

/* The catalog home: the statement on the left, the lead and buttons on the
   right, both resting on the same baseline. */
.hero-split {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
  gap: clamp(32px, 6vw, 88px);
  align-items: end;
}

.hero-side .hero-lead {
  margin-top: 0;
}

.hero-side .cta {
  margin-top: 28px;
}

/* ---------- Catalog ---------- */

.catalog {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.catalog > li {
  display: flex;
}

.catalog-card {
  position: relative;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 22px 24px 46px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--line);
  transition: transform var(--fast), border-color var(--fast), box-shadow var(--fast);
}

.catalog-card:hover {
  transform: translateY(-2px);
  border-color: var(--line-2);
  box-shadow: var(--shadow);
}

.catalog-top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 12px;
}

.catalog-name {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  line-height: 1.2;
  color: var(--ink);
}

.catalog-text {
  font-size: 15px;
  color: var(--ink-2);
}

.catalog-arrow {
  position: absolute;
  right: 22px;
  bottom: 16px;
  color: var(--ink-3);
  transition: transform var(--fast), color var(--fast);
}

.catalog-card:hover .catalog-arrow {
  color: var(--accent);
  transform: translateX(3px);
}

.soon-badge {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 3px 8px;
  border-radius: var(--radius-pill);
  color: var(--accent);
  background: var(--accent-soft);
  white-space: nowrap;
  vertical-align: middle;
}

.hero-note {
  margin-top: 26px;
  font-size: 14.5px;
  color: var(--ink-3);
  padding-left: 14px;
  border-left: 2px solid var(--accent);
  max-width: 480px;
}

.stack {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 22px;
  box-shadow: var(--shadow-lg);
}

.stack-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin: 2px 4px 14px;
}

.stack-layers {
  display: grid;
  gap: 10px;
}

.layer {
  position: relative;
}

.layer-link {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 16px;
  border-radius: 14px;
  background: var(--surface-2);
  border: 1px solid var(--line);
  border-left: 3px solid var(--mod);
  transition: border-color var(--fast), transform var(--fast), background-color var(--fast);
}

.layer-addon .layer-link {
  border-style: dashed;
  border-left-style: solid;
  background: transparent;
}

html[data-pointer-type="mouse"] .layer-link:hover,
.layer.open .layer-link,
.layer-link:focus-visible {
  transform: translateX(3px);
  border-color: var(--mod);
}

.layer .mod-icon {
  flex: none;
  width: 22px;
  height: 22px;
  color: var(--mod);
}

.layer-text {
  display: grid;
  gap: 1px;
  min-width: 0;
}

.layer-name {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  font-size: 15.5px;
  color: var(--ink);
}

.layer-badge,
.module-badge {
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 2px 8px;
  border-radius: var(--radius-pill);
  color: var(--m-ai);
  background: color-mix(in srgb, var(--m-ai) 12%, transparent);
}

.layer-line {
  font-size: 14px;
  color: var(--ink-3);
}

.stack-caption {
  margin: 16px 4px 2px;
  font-size: 13.5px;
  color: var(--ink-3);
}

/* ---------- "What it means" popups ---------- */

.tip {
  position: relative;
}

.tip-bubble {
  position: absolute;
  z-index: 40;
  top: calc(100% + 10px);
  left: 50%;
  width: max-content;
  max-width: min(320px, calc(100vw - 32px));
  padding: 14px 16px;
  border-radius: 14px;
  background: var(--ink);
  color: var(--on-ink);
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 400;
  line-height: 1.5;
  letter-spacing: 0;
  text-align: left;
  text-transform: none;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translate(calc(-50% + var(--tip-shift, 0px)), 4px);
  transition: opacity var(--fast), transform var(--fast), visibility var(--fast);
  pointer-events: none;
}

.tip-bubble::before {
  content: "";
  position: absolute;
  top: -5px;
  left: calc(50% - var(--tip-shift, 0px));
  width: 10px;
  height: 10px;
  background: inherit;
  transform: translateX(-50%) rotate(45deg);
  border-radius: 2px;
}

.tip-title {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  opacity: 0.7;
  margin-bottom: 4px;
}

html[data-pointer-type="mouse"] .tip:hover > .tip-bubble,
.tip:focus-within > .tip-bubble,
.tip.open > .tip-bubble {
  opacity: 1;
  visibility: visible;
  transform: translate(calc(-50% + var(--tip-shift, 0px)), 0);
}

/* After Escape: hidden until the pointer or focus leaves (beats :hover). */
.tip.dismissed > .tip-bubble {
  opacity: 0 !important;
  visibility: hidden !important;
}

/* Module cards: the info button sits at the end of the name, often near the
   right edge, so the bubble opens leftwards from it. */
.module-name .tip-bubble {
  left: auto;
  right: -10px;
  transform: translate(var(--tip-shift, 0px), 4px);
}

.module-name .tip-bubble::before {
  left: auto;
  right: calc(16px + var(--tip-shift, 0px));
  transform: rotate(45deg);
}

html[data-pointer-type="mouse"] .module-name .tip:hover > .tip-bubble,
.module-name .tip:focus-within > .tip-bubble,
.module-name .tip.open > .tip-bubble {
  transform: translate(var(--tip-shift, 0px), 0);
}

.tip-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 1px solid var(--line-2);
  background: transparent;
  color: var(--ink-3);
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 500;
  cursor: help;
  vertical-align: middle;
  transition: color var(--fast), border-color var(--fast);
}

.tip-icon:hover,
.tip.open .tip-icon {
  color: var(--ink);
  border-color: var(--ink);
}

/* ---------- Sections ---------- */

.section {
  padding: var(--section-space) 0;
}

.section-alt {
  background: var(--paper-2);
}

.section-head {
  max-width: 760px;
  margin-bottom: clamp(40px, 5vw, 64px);
}

/* ---------- Modules ---------- */

.modules {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.module {
  position: relative;
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow);
}

.module::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 28px;
  right: 28px;
  height: 2px;
  border-radius: 2px;
  background: var(--mod);
}

.module-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 22px;
}

.module .mod-icon {
  width: 26px;
  height: 26px;
  color: var(--mod);
}

.module-num {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--ink-3);
}

.module-name {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: 1.85rem;
  line-height: 1.15;
  letter-spacing: -0.01em;
}

.module-tagline {
  margin-top: 8px;
  color: var(--ink-2);
}

.module-includes {
  margin-top: 26px;
  margin-bottom: 4px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.module-links li + li {
  border-top: 1px solid var(--line);
}

.module-links a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 11px 0;
  font-size: 15px;
  color: var(--ink);
  transition: color var(--fast);
}

.module-links .arrow {
  color: var(--ink-3);
  transition: transform var(--fast), color var(--fast);
}

.module-links a:hover {
  color: var(--accent);
}

.module-links a:hover .arrow {
  color: var(--accent);
  transform: translateX(3px);
}

.module-addon {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  grid-template-areas:
    "top points"
    "name points"
    "tagline points"
    "status links";
  column-gap: clamp(28px, 5vw, 64px);
  align-items: start;
  background:
    linear-gradient(135deg, color-mix(in srgb, var(--m-ai) 7%, transparent), transparent 60%),
    var(--surface);
  border-style: dashed;
  border-color: color-mix(in srgb, var(--m-ai) 40%, var(--line));
}

.module-addon {
  /* Rows 1-2 hug their content; the tall points list only stretches row 3. */
  grid-template-rows: auto auto 1fr auto;
}

.module-addon .module-top {
  grid-area: top;
  justify-content: flex-start;
  gap: 12px;
}
.module-addon .module-name { grid-area: name; }
.module-addon .module-tagline { grid-area: tagline; }
.module-addon .module-points { grid-area: points; }
.module-addon .module-links { grid-area: links; align-self: end; }
.module-addon .module-status { grid-area: status; align-self: end; }

.module-points {
  display: grid;
  gap: 10px;
}

.module-points li {
  position: relative;
  padding-left: 22px;
  color: var(--ink-2);
}

.module-points li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 0.62em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  border: 1.5px solid var(--mod);
}

.module-addon .module-links {
  margin-top: 18px;
  border-top: 1px solid var(--line);
}

.module-status {
  margin-top: 22px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--m-ai);
}

.combos {
  margin-top: clamp(48px, 6vw, 72px);
  padding-top: clamp(40px, 5vw, 56px);
  border-top: 1px solid var(--line);
  display: grid;
  gap: 28px;
}

.combos-head {
  max-width: 640px;
}

.combos-head h3 {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: 1.7rem;
  line-height: 1.15;
}

.combos-head p {
  margin-top: 10px;
  color: var(--ink-2);
  font-size: 15.5px;
}

.combo-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.combo {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--surface-2);
}

.combo-dots {
  display: flex;
  gap: 5px;
  margin-bottom: 4px;
}

.combo-dots .dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--mod);
}

.combo-name {
  font-size: 16px;
  font-weight: 600;
}

.combo-text {
  font-size: 14.5px;
  color: var(--ink-2);
  flex: 1;
}

.combo-mods {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin-top: 6px;
}

/* ---------- Tags ---------- */

.mod-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.04em;
  padding: 3px 9px;
  border-radius: var(--radius-pill);
  color: var(--mod);
  background: color-mix(in srgb, var(--mod) 11%, transparent);
  white-space: nowrap;
}

.mod-tag::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
}

/* ---------- Problems and solutions (home and detail pages) ---------- */

.pairs-head,
.pair {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr);
  column-gap: clamp(24px, 4vw, 56px);
}

.pairs-tagged .pairs-head,
.pairs-tagged .pair {
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr) 132px;
}

.pairs-head {
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-2);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.pair {
  align-items: start;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

.pair-problem {
  font-family: var(--font-serif);
  font-size: 1.2rem;
  line-height: 1.35;
  color: var(--ink);
}

.pair-solution {
  font-size: 15.5px;
  color: var(--ink-2);
}

.pair-module {
  justify-self: end;
  margin-top: 3px;
}

.pairs-linked .pairs-head,
.pairs-linked .pair {
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr) 200px;
}

.pair-link,
.case-link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  font-size: 14.5px;
  color: var(--ink);
  transition: color var(--fast);
}

.pair-link {
  justify-self: end;
  text-align: right;
  margin-top: 2px;
}

.pair-link .arrow,
.case-link .arrow {
  color: var(--ink-3);
  transition: transform var(--fast), color var(--fast);
}

.pair-link:hover,
.pair-link:hover .arrow,
.case-link:hover,
.case-link:hover .arrow {
  color: var(--accent);
}

.pair-link:hover .arrow,
.case-link:hover .arrow {
  transform: translateX(3px);
}

a.mod-tag {
  transition: background-color var(--fast);
}

a.mod-tag:hover {
  background: color-mix(in srgb, var(--mod) 20%, transparent);
}

/* Wide screens: the column heads name the cells, so the labels in each cell
   are for screen readers only. Narrow screens show them (see Responsive). */
.pair-label {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

/* ---------- Signs (older pages) ---------- */

.signs {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.sign a {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: flex-start;
  gap: 22px;
  height: 100%;
  padding: 24px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--line);
  transition: transform var(--fast), border-color var(--fast), box-shadow var(--fast);
}

.sign a:hover {
  transform: translateY(-2px);
  border-color: var(--mod);
  box-shadow: var(--shadow);
}

.sign-text {
  font-family: var(--font-serif);
  font-size: 1.32rem;
  line-height: 1.3;
  color: var(--ink);
}

/* ---------- Results ---------- */

.results {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.result {
  padding: 26px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--line);
}

.result-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 16px;
}

.result h3 {
  font-size: 1.12rem;
  font-weight: 600;
  line-height: 1.35;
  letter-spacing: -0.01em;
}

.result p {
  margin-top: 8px;
  font-size: 15.5px;
  color: var(--ink-2);
}

/* ---------- Cases ---------- */

.cases {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.case {
  display: flex;
  flex-direction: column;
  padding: 26px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--line);
}

.case .case-facts {
  flex: 1;
}

.case-link {
  justify-content: space-between;
  margin-top: 18px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
}

.case-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 16px;
}

.case h3 {
  font-size: 1.12rem;
  font-weight: 600;
  line-height: 1.35;
  letter-spacing: -0.01em;
}

.case-facts {
  display: grid;
  gap: 12px;
  margin-top: 14px;
}

.case-facts dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.case-facts dd {
  margin-top: 2px;
  font-size: 15px;
  color: var(--ink-2);
}

/* ---------- Technologies ---------- */

.tech {
  margin-top: clamp(48px, 6vw, 72px);
  padding-top: 28px;
  border-top: 1px solid var(--line);
}

.tech-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin-bottom: 20px;
}

.tech-groups {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(230px, 1fr));
  gap: 22px 36px;
}

.tech-group dt {
  font-size: 14.5px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 6px;
}

.tech-list {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 16px;
}

.tech-list li {
  font-family: var(--font-mono);
  font-size: 13.5px;
  color: var(--ink-2);
}

/* ---------- Process ---------- */

.steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 28px;
  counter-reset: step;
}

.step {
  padding-top: 22px;
  border-top: 1px solid var(--line-2);
}

.step-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--accent);
  margin-bottom: 18px;
}

.step h3 {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: 1.45rem;
  line-height: 1.2;
}

.step p {
  margin-top: 10px;
  font-size: 15.5px;
  color: var(--ink-2);
}

/* ---------- About ---------- */

.about {
  display: grid;
  grid-template-columns: minmax(0, 300px) minmax(0, 1fr);
  gap: clamp(32px, 6vw, 80px);
  align-items: center;
}

.about-photo {
  aspect-ratio: 4 / 5;
  border-radius: var(--radius-lg);
  border: 1.5px dashed var(--line-2);
  background:
    linear-gradient(160deg, var(--accent-soft), transparent 70%),
    var(--surface-2);
  display: flex;
  align-items: center;
  justify-content: center;
}

.about-photo span {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.about-role {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 13.5px;
  color: var(--ink-3);
}

.about-text p:not(.eyebrow):not(.about-role) {
  margin-top: 18px;
  font-size: 1.08rem;
  color: var(--ink-2);
  max-width: 620px;
}

/* ---------- Contact ---------- */

.section-contact {
  background: var(--paper-2);
}

.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(36px, 6vw, 80px);
  align-items: start;
}

.contact-next-title {
  margin-top: 36px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.contact-next {
  margin-top: 14px;
  display: grid;
  gap: 12px;
  counter-reset: next;
}

.contact-next li {
  counter-increment: next;
  position: relative;
  padding-left: 36px;
  color: var(--ink-2);
}

.contact-next li::before {
  content: counter(next);
  position: absolute;
  left: 0;
  top: 1px;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 1px solid var(--line-2);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 22px;
  text-align: center;
  color: var(--ink);
}

.contact-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: clamp(22px, 3.5vw, 36px);
  box-shadow: var(--shadow-lg);
}

#contactForm {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.field.full {
  grid-column: 1 / -1;
}

.field input,
.field select,
.field textarea {
  width: 100%;
  padding: 13px 15px;
  font-size: 16px;
  line-height: 1.4;
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--line-2);
  border-radius: 12px;
  transition: border-color var(--fast), box-shadow var(--fast), background-color var(--fast);
  appearance: none;
  -webkit-appearance: none;
}

.field select {
  padding-right: 40px;
  background-image: var(--select-arrow);
  background-repeat: no-repeat;
  background-position: right 15px center;
  cursor: pointer;
}

.field textarea {
  min-height: 140px;
  resize: vertical;
}

.field input::placeholder,
.field textarea::placeholder,
.field select:has(> option[value=""]:checked) {
  color: var(--ink-3);
}

.field select option {
  color: var(--ink);
}

.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-soft);
}

.field .invalid,
.field input.invalid,
.field select.invalid,
.field textarea.invalid {
  border-color: var(--danger);
}

.field-error {
  font-size: 13px;
  color: var(--danger);
  min-height: 0;
}

.field-error:empty {
  display: none;
}

#contactForm .btn {
  grid-column: 1 / -1;
  justify-self: start;
  margin-top: 4px;
}

#status {
  margin-top: 16px;
  font-size: 15px;
  color: var(--ink-2);
}

#status:empty {
  display: none;
}

#status[data-state="success"] {
  color: var(--success);
}

#status[data-state="error"] {
  color: var(--danger);
}

.hp-field {
  position: absolute;
  left: -10000px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

/* ---------- Footer ---------- */

.footer {
  border-top: 1px solid var(--line);
  padding: 44px 0 52px;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 28px;
}

.footer-note {
  font-size: 14.5px;
  color: var(--ink-2);
}

.footer-copy {
  margin-left: auto;
  font-size: 13.5px;
  color: var(--ink-3);
}

/* ---------- Detail pages ---------- */

.service-hero {
  position: relative;
  padding: clamp(48px, 7vw, 88px) 0 clamp(48px, 6vw, 72px);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.service-hero::before {
  content: "";
  position: absolute;
  inset: -40% -10% auto auto;
  width: 55%;
  height: 160%;
  background: radial-gradient(closest-side, var(--accent-soft), transparent 70%);
  pointer-events: none;
  opacity: 0.7;
}

.service-hero .container {
  position: relative;
}

.hero-top-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 20px;
  margin-bottom: 26px;
}

.hero-top-row .hero-eyebrow {
  margin-bottom: 0;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14.5px;
  color: var(--ink-2);
  transition: color var(--fast);
}

.back-link::before {
  content: "←";
  transition: transform var(--fast);
}

.back-link:hover {
  color: var(--ink);
}

.back-link:hover::before {
  transform: translateX(-3px);
}

.service-hero h1 {
  font-size: clamp(2.4rem, 5vw, 3.9rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
  max-width: 900px;
}

.lead {
  margin-top: 24px;
  font-size: clamp(1.08rem, 1.5vw, 1.22rem);
  color: var(--ink-2);
  max-width: 760px;
}

.env-note {
  margin-top: 22px;
  padding-left: 16px;
  border-left: 2px solid var(--accent);
  color: var(--ink-2);
  max-width: 720px;
}

/* Same left edge as the hero above; only the blocks inside are narrowed. */
.service-content > * {
  max-width: 860px;
}

.service-content > h2 {
  font-size: clamp(1.7rem, 2.8vw, 2.2rem);
  line-height: 1.15;
  margin: 64px 0 14px;
}

.service-content > h2:first-child {
  margin-top: 0;
}

.service-content > p {
  color: var(--ink-2);
  margin-bottom: 14px;
}

.feature-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 20px;
}

.feature-list li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 18px 20px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--line);
}

.feature-list strong {
  font-size: 15.5px;
}

.feature-list span {
  font-size: 15px;
  color: var(--ink-2);
}

.tech-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.tech-stack > span,
.tech-stack > li {
  font-family: var(--font-mono);
  font-size: 13px;
  padding: 6px 12px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--line-2);
  background: var(--surface);
  color: var(--ink-2);
}

/* A chip with example products: the whole chip is the popup trigger. */
.tech-stack li.chip-tip {
  padding: 0;
}

.chip-trigger {
  padding: 6px 12px;
  border: 0;
  border-radius: inherit;
  background: none;
  color: inherit;
  font: inherit;
  cursor: help;
  text-decoration: underline dotted;
  text-decoration-color: var(--ink-3);
  text-underline-offset: 4px;
}

.chip-tip:hover,
.chip-tip.open {
  border-color: var(--ink-3);
}

.tech-list .chip-trigger {
  padding: 0;
}

.tech-stack-note {
  margin-top: 14px;
  font-size: 14.5px;
  color: var(--ink-3);
}

.info-box {
  margin-top: 48px;
  padding: 22px 24px;
  border-radius: var(--radius);
  background: var(--paper-2);
  border-left: 3px solid var(--accent);
}

.info-box + .info-box {
  margin-top: 16px;
}

.info-box-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 8px;
}

.info-box p {
  color: var(--ink-2);
}

.service-cta-box {
  margin-top: 56px;
  padding: clamp(28px, 4vw, 44px);
  border-radius: var(--radius-lg);
  background: var(--ink);
  color: var(--on-ink);
}

.service-cta-box h3 {
  font-size: clamp(1.6rem, 2.6vw, 2.1rem);
  line-height: 1.15;
  color: var(--on-ink);
}

.service-cta-box p {
  margin-top: 10px;
  opacity: 0.8;
  max-width: 620px;
}

.service-cta-box .btn.primary {
  margin-top: 24px;
  background: var(--on-ink);
  color: var(--ink);
}

.service-cta-box .btn.primary:hover {
  background: var(--accent);
  color: #fff8f2;
}

.service-content .pairs {
  margin-top: 8px;
}

.approach {
  margin-top: 8px;
}

.approach li {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  padding: 18px 0;
  border-top: 1px solid var(--line);
}

.approach li:last-child {
  border-bottom: 1px solid var(--line);
}

.approach-num {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--accent);
  padding-top: 3px;
}

.approach h3 {
  font-size: 1.05rem;
  font-weight: 600;
  line-height: 1.4;
}

.approach p {
  margin-top: 4px;
  font-size: 15.5px;
  color: var(--ink-2);
}

.deliverables {
  display: grid;
  gap: 12px;
  margin-top: 8px;
}

.deliverables li {
  position: relative;
  padding-left: 30px;
  color: var(--ink-2);
}

/* A check mark. */
.deliverables li::before {
  content: "";
  position: absolute;
  left: 3px;
  top: 0.45em;
  width: 13px;
  height: 7px;
  border-left: 2px solid var(--accent);
  border-bottom: 2px solid var(--accent);
  transform: rotate(-45deg);
}

.related {
  margin-top: 56px;
}

.related .related-title {
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin-bottom: 6px;
}

.related-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  column-gap: 32px;
}

.related-list li {
  border-top: 1px solid var(--line);
}

.related-list .soon-badge {
  margin-left: 8px;
}

.availability {
  margin-top: 20px;
  padding-left: 16px;
  border-left: 2px solid var(--accent);
  color: var(--ink-2);
  max-width: 720px;
}

.related-list a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 0;
  color: var(--ink);
  transition: color var(--fast);
}

.related-list .arrow {
  color: var(--ink-3);
  transition: transform var(--fast), color var(--fast);
}

.related-list a:hover,
.related-list a:hover .arrow {
  color: var(--accent);
}

.related-list a:hover .arrow {
  transform: translateX(3px);
}

/* In-text links */
.info-box a,
.tech-stack-note a,
.service-content > p a,
.module-status a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.info-box a:hover,
.tech-stack-note a:hover,
.service-content > p a:hover {
  color: var(--accent-strong);
}

/* ---------- Reveal on scroll (home only: its <html> gets the "js" class) ---------- */

.js .fade-section {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity var(--slow), transform var(--slow);
}

.js .fade-section.visible {
  opacity: 1;
  transform: none;
}

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

  .js .fade-section {
    opacity: 1;
    transform: none;
  }
}

/* ---------- Responsive ---------- */

/* Below this width the lead column of the hero gets too narrow and tall, so
   the statement and the lead stack. */
@media (max-width: 1200px) {
  .hero-split {
    grid-template-columns: 1fr;
    align-items: start;
    gap: 28px;
  }

  .hero-side {
    max-width: 680px;
  }
}

@media (max-width: 1080px) {
  .combo-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    row-gap: 36px;
  }
}

@media (max-width: 960px) {
  .main-nav {
    display: none;
  }

  .header-tools {
    margin-left: auto;
  }

  .hero-grid,
  .hero-split,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .catalog {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .stack {
    max-width: 560px;
  }

  .modules {
    grid-template-columns: 1fr;
  }

  .module-addon {
    grid-template-columns: 1fr;
    grid-template-areas:
      "top"
      "name"
      "tagline"
      "points"
      "links"
      "status";
  }

  .module-addon .module-points {
    margin-top: 22px;
  }

  .signs,
  .results,
  .cases {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .about {
    grid-template-columns: minmax(0, 200px) minmax(0, 1fr);
    align-items: start;
  }
}

@media (max-width: 760px) {
  .pairs-head {
    display: none;
  }

  .pair,
  .pairs-tagged .pair,
  .pairs-linked .pair {
    grid-template-columns: 1fr;
    row-gap: 10px;
  }

  .pair-link {
    justify-self: start;
    text-align: left;
  }

  .related-list {
    grid-template-columns: 1fr;
  }

  .pair-label {
    position: static;
    width: auto;
    height: auto;
    overflow: visible;
    clip-path: none;
    white-space: normal;
    display: block;
    margin-bottom: 3px;
    font-family: var(--font-mono);
    font-size: 11px;
    line-height: 1.5;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--ink-3);
  }

  .pair-module {
    justify-self: start;
  }
}

@media (max-width: 640px) {
  body {
    font-size: 16px;
  }

  /* On narrow screens the glow reads as a band; spread it and tone it down. */
  .hero::before,
  .service-hero::before {
    width: 140%;
    inset: -10% -60% auto auto;
    opacity: 0.45;
  }

  .signs,
  .results,
  .cases,
  .catalog,
  .combo-list,
  .steps,
  .feature-list {
    grid-template-columns: 1fr;
  }

  .about {
    grid-template-columns: 1fr;
  }

  .about-photo {
    max-width: 180px;
  }

  #contactForm {
    grid-template-columns: 1fr;
  }

  .cta .btn {
    flex: 1 1 auto;
  }

  .footer-copy {
    margin-left: 0;
  }

  .module {
    padding: 24px 22px;
  }
}

@media (max-width: 480px) {
  .header-inner {
    gap: 12px;
  }

  .header-cta {
    display: none;
  }

  .logo span {
    font-size: 15.5px;
  }

  .language-picker a {
    padding: 4px 4px;
  }
}