/* Hevelius AI Group, heveliusai.com
   One calm column (max 68rem), phone first. Each section opens with a small label over a hairline.
   Nothing is fixed to the screen and nothing animates. Colors are tokens; dark follows the system. */

@font-face { font-family: "Montserrat"; font-weight: 600; font-style: normal; font-display: swap; src: url("fonts/montserrat-latin-600-normal.woff2") format("woff2"); }
@font-face { font-family: "IBM Plex Sans"; font-weight: 400; font-style: normal; font-display: swap; src: url("fonts/ibm-plex-sans-latin-400-normal.woff2") format("woff2"); }
@font-face { font-family: "IBM Plex Sans"; font-weight: 500; font-style: normal; font-display: swap; src: url("fonts/ibm-plex-sans-latin-500-normal.woff2") format("woff2"); }
@font-face { font-family: "IBM Plex Sans"; font-weight: 600; font-style: normal; font-display: swap; src: url("fonts/ibm-plex-sans-latin-600-normal.woff2") format("woff2"); }
@font-face { font-family: "IBM Plex Mono"; font-weight: 400; font-style: normal; font-display: swap; src: url("fonts/ibm-plex-mono-latin-400-normal.woff2") format("woff2"); }
@font-face { font-family: "IBM Plex Mono"; font-weight: 500; font-style: normal; font-display: swap; src: url("fonts/ibm-plex-mono-latin-500-normal.woff2") format("woff2"); }

:root {
  --bg: #F5F6F8;
  --surface: #FFFFFF;
  --fg: #0B1F3A;
  --muted: #44546B;
  --rule: #D3D8E0;
  --accent: #0B1F3A;
  --accent-fg: #FFFFFF;
  --link: #1B4B8F;
  --silver: #C0C6CF;
  --focus: #1B4B8F;
  --display: "Montserrat", "Avenir Next", "Century Gothic", "Segoe UI", Arial, sans-serif;
  --body: "IBM Plex Sans", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "Cascadia Mono", Consolas, monospace;
  --step--1: 1rem; /* smallest text on the page: 16px (section 6) */
  --step-0: 1.0625rem;
  --step-1: 1.25rem;
  --step-3: clamp(min(1.75rem, 8vw), 1.35rem + 1.7vw, 2.375rem);
  /* Headings are capped by screen width on very narrow phones, so large system text never splits a word. */
  --step-4: clamp(min(2.25rem, 10.5vw), 1.5rem + 3.6vw, 3.75rem);
  --gutter: clamp(1rem, 4vw, 2.5rem);
  --tap: max(44px, 2.75rem); /* touch target, never under 44px */
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0B1F3A;
    --surface: #12294A;
    --fg: #F2F4F7;
    --muted: #C0C6CF;
    --rule: #2A4062;
    --accent: #FFFFFF;
    --accent-fg: #0B1F3A;
    --link: #AFC6F2;
    --focus: #FFD479;
    color-scheme: dark;
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { font-size: 100%; }
/* iOS only: follow the visitor's Dynamic Type text size (default 17px). */
@supports (font: -apple-system-body) and (-webkit-touch-callout: none) {
  html { font: -apple-system-body; }
  :root { --step-0: 1rem; }
}
@media (prefers-reduced-motion: no-preference) { html { scroll-behavior: smooth; } }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--body);
  font-size: var(--step-0);
  line-height: 1.6;
  overflow-wrap: break-word;
}
img, svg { max-width: 100%; }
p, ul, ol, h1, h2, h3, figure, table { margin: 0; }
ul, ol { padding: 0; list-style: none; }
[hidden] { display: none !important; }
/* One-column grids get an explicit track so a long word never widens the page. */
.hero-copy, .section-head, .prose, .stack, .block, .steps li, .services > li, .contact-card, .site-footer div { grid-template-columns: minmax(0, 1fr); }
h1, h2 { hyphens: auto; }

a { color: var(--link); text-decoration: underline; text-underline-offset: 0.18em; text-decoration-thickness: 0.08em; }
a:hover { text-decoration-thickness: 0.14em; }
a:active { opacity: 0.7; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 3px; border-radius: 2px; }

/* A link that stands on its own line: a full 44px touch target. */
.tap { display: inline-flex; align-items: center; min-height: var(--tap); }
/* A link inside a sentence: the touch area grows without moving the text around it. */
.tap-inline { padding-block: 0.85rem; }

.skip {
  position: absolute; top: -10rem; left: max(1rem, env(safe-area-inset-left)); z-index: 10;
  display: inline-flex; align-items: center; min-height: var(--tap);
  background: var(--accent); color: var(--accent-fg);
  padding: 0.5rem 1rem; font-weight: 600; text-decoration: none;
}
.skip:focus { top: max(1rem, env(safe-area-inset-top)); }

.wrap {
  max-width: 68rem; margin-inline: auto;
  padding-left: max(var(--gutter), env(safe-area-inset-left));
  padding-right: max(var(--gutter), env(safe-area-inset-right));
}

/* Header */
.site-header .wrap {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
  gap: 0.5rem 2rem; padding-top: max(1.25rem, env(safe-area-inset-top)); padding-bottom: 1.25rem;
}
.brand { color: var(--fg); text-decoration: none; display: inline-flex; align-items: center; min-height: var(--tap); }
.brand svg { height: 2.9rem; width: auto; display: block; }
.brand .moon { fill: var(--silver); }
.site-nav ul { display: flex; flex-wrap: wrap; gap: 0 1.5rem; }
.site-nav a {
  display: inline-flex; align-items: center; min-height: var(--tap);
  color: var(--fg); text-decoration: none; font-weight: 500; font-size: var(--step--1);
  letter-spacing: 0.02em;
}
.site-nav a:hover { color: var(--link); text-decoration: underline; }

/* Opening */
.hero .wrap {
  display: grid; grid-template-columns: minmax(0, 1fr);
  gap: 2rem 3rem; align-items: center; padding-block: clamp(2rem, 6vw, 4.5rem);
}
.hero-copy { display: grid; gap: 1.5rem; min-width: 0; }
h1 {
  font-family: var(--display); font-weight: 600; font-size: var(--step-4);
  line-height: 1.08; letter-spacing: -0.02em; text-wrap: balance;
}
.lede { font-size: var(--step-1); line-height: 1.5; color: var(--muted); max-width: 34rem; }
.actions { display: flex; flex-wrap: wrap; gap: 0.75rem 1rem; }
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: max(48px, 3rem); padding: 0.6rem 1.25rem; border-radius: 4px;
  font: inherit; font-weight: 600; font-size: 1rem; line-height: 1.3; text-decoration: none; cursor: pointer;
  border: 2px solid var(--accent);
}
.btn-primary { background: var(--accent); color: var(--accent-fg); }
.btn-quiet { background: transparent; color: var(--fg); border-color: var(--fg); }
.btn:hover { text-decoration: underline; }
.btn:active { opacity: 0.8; }
/* On phones the emblem follows the buttons, so the headline and its sentence come first. */
.plate { justify-self: start; width: min(62%, 14rem); }
.plate img { display: block; width: 100%; height: auto; border-radius: 12px; }

/* Sections */
main > section { padding-block: clamp(2.5rem, 6vw, 4.5rem); }
.section-head { display: grid; gap: 0.75rem; margin-bottom: 2rem; max-width: 44rem; }
.section-head.flush { margin-bottom: 0; }
.label {
  font-family: var(--mono); font-size: var(--step--1); font-weight: 500; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--muted);
  border-top: 1px solid var(--rule); padding-top: 1rem;
}
h2 { font-family: var(--display); font-weight: 600; font-size: var(--step-3); line-height: 1.12; text-wrap: balance; }
h3 { font-family: var(--body); font-weight: 600; font-size: var(--step-1); line-height: 1.3; }
.prose { display: grid; gap: 1rem; max-width: 40rem; }
.muted { color: var(--muted); }
code { font-family: var(--mono); font-size: max(1rem, 0.92em); overflow-wrap: anywhere; }

.status {
  display: inline-flex; align-items: center; gap: 0.5rem; justify-self: start;
  font-family: var(--mono); font-size: var(--step--1); color: var(--muted);
  border: 1px solid var(--muted); border-radius: 999px; padding: 0.3rem 0.85rem;
}
.status::before { content: ""; flex: none; width: 0.5rem; height: 0.5rem; border-radius: 50%; background: var(--muted); }

.split { display: grid; grid-template-columns: minmax(0, 1fr); gap: 2rem 3rem; align-items: start; }
.stack { display: grid; gap: 2.5rem; }
.block { display: grid; gap: 1rem; min-width: 0; }

/* Evidence example */
.evidence { border: 1px solid var(--rule); background: var(--surface); border-radius: 6px; min-width: 0; }
.evidence figcaption {
  font-family: var(--mono); font-size: var(--step--1); color: var(--muted);
  padding: 0.7rem 1rem; border-bottom: 1px solid var(--rule);
}
.scroll { overflow-x: auto; }
.evidence pre {
  margin: 0; padding: 1rem; font-family: var(--mono); font-size: var(--step--1); line-height: 1.7;
  color: var(--fg); white-space: pre; overflow-wrap: normal;
}
.ok { color: var(--link); font-weight: 500; }

/* Steps */
.steps { display: grid; grid-template-columns: minmax(0, 1fr); gap: 2rem; counter-reset: step; }
.steps li { display: grid; gap: 0.6rem; align-content: start; counter-increment: step; min-width: 0; }
.steps li::before {
  content: counter(step, decimal-leading-zero);
  font-family: var(--mono); font-size: var(--step--1); color: var(--muted);
}
small { font-size: var(--step--1); }

/* Table */
table { width: 100%; border-collapse: collapse; font-size: 1rem; }
caption { text-align: left; font-weight: 600; font-size: var(--step-1); padding-bottom: 0.75rem; }
th, td { text-align: left; vertical-align: top; padding: 0.8rem 1rem 0.8rem 0; border-top: 1px solid var(--rule); }
thead th { font-family: var(--mono); font-size: var(--step--1); font-weight: 500; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); border-top: 0; }
tbody th { font-weight: 600; }
td.when { font-family: var(--mono); font-size: var(--step--1); white-space: nowrap; }

/* Lists */
.points { display: grid; gap: 0.9rem; }
.points li { padding-left: 1.4rem; position: relative; }
.points li::before {
  content: ""; position: absolute; left: 0; top: 0.62em; width: 0.5rem; height: 0.5rem;
  background: var(--accent); transform: rotate(45deg);
}
.points strong { font-weight: 600; }

.services { display: grid; grid-template-columns: minmax(0, 1fr); gap: 2rem; }
.services > li { display: grid; gap: 0.6rem; align-content: start; border-top: 2px solid var(--accent); padding-top: 1rem; min-width: 0; }

/* Contact */
.contact-card {
  display: grid; gap: 1.25rem; background: var(--surface); border: 1px solid var(--rule);
  border-radius: 6px; padding: clamp(1.25rem, 4vw, 2.25rem); max-width: 44rem;
}
.email { font-family: var(--display); font-weight: 600; font-size: var(--step-1); line-height: 1.2; }
.email a { overflow-wrap: anywhere; }
.copy-row { display: flex; flex-wrap: wrap; align-items: center; gap: 0.75rem 1rem; }
#copy-status { font-size: var(--step--1); color: var(--muted); }

/* Footer */
.site-footer { border-top: 1px solid var(--rule); font-size: var(--step--1); color: var(--muted); }
.site-footer .wrap {
  display: grid; grid-template-columns: minmax(0, 1fr); gap: 1.5rem 2.5rem;
  padding-top: 2.5rem; padding-bottom: max(2.5rem, env(safe-area-inset-bottom));
}
.site-footer h2 { font-family: var(--mono); font-size: var(--step--1); font-weight: 500; letter-spacing: 0.1em; text-transform: uppercase; color: var(--fg); margin-bottom: 0.5rem; }
.site-footer div { display: grid; gap: 0.5rem; align-content: start; min-width: 0; }
.fineprint { grid-column: 1 / -1; border-top: 1px solid var(--rule); padding-top: 1.25rem; }

[id] { scroll-margin-top: 1rem; }

/* Wider screens add columns. */
@media (min-width: 52rem) {
  .hero .wrap { grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr); }
  .plate { justify-self: center; width: min(100%, 21rem); }
  .split { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .split-evidence { grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr); }
  .steps, .services, .site-footer .wrap { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  tbody th { white-space: nowrap; }
}