/* SigilAtlas — shared foundation. Page-specific styles stay inline per page. */

:root {
  --bg: #000;
  --panel: rgba(255, 255, 255, 0.02);
  --ink: #ededed;
  --ink-dim: #b3b3b3;
  --ink-faint: #8a8a8a;
  --amber: #f7a83e;
  --cyan: #6fd3e0;
  --cyan-deep: #82cbd6;
  --line: rgba(255, 255, 255, 0.1);
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Monaco,
    "Cascadia Code", "Roboto Mono", monospace;
  --serif: "Iowan Old Style", "Charter", "Palatino Linotype", Palatino,
    "Book Antiqua", Georgia, serif;
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--serif);
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

::selection {
  background: var(--amber);
  color: #000;
}

a {
  color: inherit;
}

em {
  font-style: italic;
  color: var(--ink);
}

/* ---------- top nav ---------- */
.topnav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px 24px;
  flex-wrap: wrap;
  max-width: 1100px;
  margin: 0 auto;
  padding: 18px 24px;
  font-family: var(--mono);
}

.topnav .brand {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-decoration: none;
  color: var(--ink);
}

.topnav nav {
  display: flex;
  gap: 22px;
  align-items: center;
  flex-wrap: wrap;
  font-size: 12.5px;
}

.topnav nav a {
  text-decoration: none;
  color: var(--ink-dim);
  transition: color 0.16s ease;
}

.topnav nav a:hover,
.topnav nav a.is-here {
  color: #fff;
}

/* A button in the nav keeps its own button colors — the .topnav nav a rule
   above would otherwise override them and bury the label in the amber fill. */
.topnav nav a.btn-primary,
.topnav nav a.btn-primary:hover {
  color: #1a1206;
}

.topnav nav a.btn-ghost,
.topnav nav a.btn-ghost:hover {
  color: var(--ink);
}

/* Landing: nav floats over the hero. Subpages: a plain bar. */
.topnav-overlay {
  position: absolute;
  inset: 0 0 auto 0;
  z-index: 5;
}

.topnav-bar {
  border-bottom: 1px solid var(--line);
}

/* ---------- shared chrome ---------- */
.eyebrow {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--amber);
  margin: 0 0 1.1em;
}

.wrap {
  max-width: 760px;
  margin: 0 auto;
  padding: 0 24px;
}

section {
  padding-block: clamp(64px, 12vh, 132px);
}

.lead {
  font-size: clamp(1.06rem, 2.2vw, 1.24rem);
  color: var(--ink-dim);
  margin: 0;
  max-width: 60ch;
}

.lead + .lead {
  margin-top: 1.1em;
}

.more {
  margin: 2em 0 0;
}

.more a {
  font-family: var(--mono);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--amber);
  text-decoration: none;
}

.more a:hover {
  color: #ffc068;
}

.pull {
  border-left: 2px solid var(--amber);
  padding-left: clamp(18px, 3vw, 30px);
  margin: 2.6em 0 0;
  font-size: clamp(1.28rem, 3vw, 1.78rem);
  line-height: 1.32;
  color: var(--ink);
}

/* ---------- buttons ---------- */
.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 2.2em;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.55em;
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.03em;
  padding: 0.92em 1.35em;
  border-radius: 9px;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  -webkit-appearance: none;
  appearance: none;
  transition: background 0.18s ease, border-color 0.18s ease,
    transform 0.18s ease, color 0.18s ease;
}

.btn:active {
  transform: translateY(1px);
}

.btn-primary {
  background: var(--amber);
  color: #1a1206;
}

.btn-primary:hover {
  background: #ffc068;
}

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

.btn-ghost:hover {
  border-color: var(--ink-dim);
  background: rgba(255, 255, 255, 0.045);
}

.btn-sm {
  font-size: 12px;
  padding: 0.55em 0.95em;
  border-radius: 7px;
}

.btn .arrow {
  transition: transform 0.18s ease;
}

.btn:hover .arrow {
  transform: translateX(3px);
}

/* ---------- article pages (ideas, how-it-works, apps) ---------- */
.page-head {
  padding: clamp(56px, 10vh, 110px) 0 0;
}

.page-title {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(1.9rem, 5vw, 3rem);
  line-height: 1.15;
  margin: 0 0 0.5em;
  color: var(--ink);
}

.lede {
  font-size: clamp(1.1rem, 2.4vw, 1.32rem);
  color: var(--ink-dim);
  margin: 0;
  max-width: 56ch;
}

.prose {
  padding-bottom: clamp(72px, 12vh, 140px);
}

.prose h2.eyebrow {
  margin-top: 3.4em;
}

.prose p {
  font-size: 1.08rem;
  color: var(--ink-dim);
  max-width: 64ch;
  margin: 0 0 1.1em;
}

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

.prose ul {
  margin: 0 0 1.1em;
  padding-left: 1.2em;
  color: var(--ink-dim);
  font-size: 1.08rem;
  max-width: 62ch;
}

.prose li {
  margin-bottom: 0.55em;
}

.prose li::marker {
  color: var(--ink-faint);
}

.prose .verb {
  color: #fff;
  font-style: normal;
  font-family: var(--mono);
  font-size: 0.88em;
}

figure {
  margin: 2.6em 0;
}

figure img {
  width: 100%;
  display: block;
  border-radius: 12px;
  border: 1px solid var(--line);
}

figcaption {
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.55;
  color: var(--ink-faint);
  margin-top: 12px;
}

/* vocabulary */
.vocab dt {
  font-family: var(--mono);
  font-size: 0.95rem;
  font-weight: 600;
  color: #fff;
  margin-top: 1.2em;
}

.vocab dd {
  margin: 0.15em 0 0;
  color: var(--ink-dim);
  font-size: 1.04rem;
  max-width: 60ch;
}

/* ---------- footer ---------- */
footer {
  border-top: 1px solid var(--line);
  padding: 34px 24px;
}

.foot {
  max-width: 980px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 20px;
  align-items: center;
  justify-content: space-between;
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--ink-faint);
}

.foot nav {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.foot a {
  text-decoration: none;
  color: var(--ink-faint);
  transition: color 0.16s ease;
}

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

/* Phones: stack the brand above the nav, and let all links share one
   tidy row instead of dropping a lone "Download" onto its own line. */
@media (max-width: 540px) {
  .foot {
    flex-direction: column;
    align-items: flex-start;
    gap: 14px;
  }
  .foot nav {
    width: 100%;
    flex-wrap: nowrap;
    justify-content: space-between;
    gap: 6px;
    font-size: 11px;
  }
  /* Top nav: keep it to one line. The nav never wraps internally, so the
     Web app button can't drop onto its own row over the hero. */
  .topnav {
    padding: 14px 16px;
    gap: 10px 16px;
  }
  .topnav nav {
    flex-wrap: nowrap;
    gap: 12px;
    font-size: 11px;
  }
  /* Landing: the hero repeats the wordmark, so drop the small brand and let
     the nav sit on one line. Subpage bars keep their brand above the nav. */
  .topnav-overlay .topnav {
    justify-content: flex-end;
  }
  .topnav-overlay .topnav .brand {
    display: none;
  }
}

/* ---------- reveal (landing only) ---------- */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.in {
  opacity: 1;
  transform: none;
}

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