/* ── NorthHarbor Dev — derived from HALOS, shared but distinct ── */

:root {
  --bg: #06132a;
  --bg-soft: #0e2040;
  --surface: rgba(255, 255, 255, 0.04);
  --surface-strong: rgba(255, 255, 255, 0.07);
  --border: rgba(92, 184, 230, 0.18);
  --text: #edf7ff;
  --text-soft: #b8d4e8;
  --accent: #5cb8e6;
  --accent-strong: #3a5ed4;
  --halo: #d0f0f5;
  --max: 1240px;
  --shadow: 0 20px 50px rgba(0, 0, 0, 0.28);
  --body-size: 1.15rem;
  --body-leading: 1.75;
  --deck-size: 1.15rem;
  --card-size: 1.02rem;
  --prose-width: 72ch;
}

html[data-page-width="wide"] {
  --prose-width: 108ch;
}

html[data-text-size="compact"] {
  --body-size: 0.9rem;
  --body-leading: 1.65;
  --deck-size: 0.95rem;
  --card-size: 0.85rem;
}

html[data-text-size="comfortable"] {
  --body-size: 1.15rem;
  --body-leading: 1.75;
  --deck-size: 1.15rem;
  --card-size: 1.02rem;
}

html[data-text-size="large"] {
  --body-size: 1.5rem;
  --body-leading: 1.9;
  --deck-size: 1.45rem;
  --card-size: 1.25rem;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  background: var(--bg);
}

body {
  margin: 0;
  font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top, rgba(58, 94, 212, 0.14), transparent 38%),
    radial-gradient(circle at 20% 20%, rgba(92, 184, 230, 0.10), transparent 28%),
    linear-gradient(180deg, #06132a 0%, #040b17 100%);
  line-height: var(--body-leading);
}

a {
  color: var(--accent);
  text-decoration: none;
}

a:hover {
  color: var(--halo);
}

strong {
  color: var(--text);
}

/* ── Site shell (sticky nav) ── */

.site-shell {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(14px);
  background: rgba(6, 19, 42, 0.76);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.site-nav,
.site-footer__inner,
.page-shell {
  width: min(calc(100% - 6rem), var(--max));
  margin: 0 auto;
}

.site-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  padding: 1rem 0;
}

.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--text);
  font-weight: 700;
  letter-spacing: 0.02em;
  font-size: 1.05rem;
}

.site-brand__mark {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  flex-shrink: 0;
}

.site-brand__suffix {
  color: var(--accent);
  font-weight: 500;
}

.site-links {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.site-links a {
  color: var(--text-soft);
  font-size: 1rem;
}

.site-links a.is-current {
  color: var(--halo);
  font-weight: 600;
}

/* ── Hamburger toggle ── */

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 0;
  border-radius: 8px;
  background: transparent;
  color: var(--text-soft);
  cursor: pointer;
  transition: background 140ms ease, color 140ms ease;
}

.nav-toggle:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.05);
}

.nav-toggle__bar {
  display: block;
  width: 20px;
  height: 2px;
  background: currentColor;
  border-radius: 1px;
  transition: transform 140ms ease, opacity 140ms ease;
}

.site-shell.nav-open .nav-toggle__bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.site-shell.nav-open .nav-toggle__bar:nth-child(2) {
  opacity: 0;
}

.site-shell.nav-open .nav-toggle__bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ── Page shell ── */

.page-shell {
  padding: 3rem 0 5rem;
}

.page-prose {
  max-width: var(--prose-width);
  margin-left: auto;
  margin-right: auto;
}

.page-prose h1,
.page-prose h2,
.page-prose h3 {
  line-height: 1.15;
  letter-spacing: -0.02em;
}

.page-prose h1 {
  font-size: clamp(2.4rem, 4vw, 4rem);
  margin-bottom: 1rem;
}

.page-prose h2 {
  font-size: clamp(1.5rem, 2.2vw, 2rem);
  margin-top: 3rem;
  margin-bottom: 1rem;
}

.page-prose h3 {
  font-size: 1.15rem;
  margin-top: 2rem;
  margin-bottom: 0.75rem;
}

.page-prose p,
.page-prose li {
  color: var(--text-soft);
  font-size: var(--body-size);
}

.page-prose ul {
  padding-left: 1.25rem;
}

.page-prose hr {
  border: 0;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  margin: 2.5rem 0;
}

/* Homepage prose column */
.home-prose {
  max-width: var(--prose-width);
  margin-left: auto;
  margin-right: auto;
}

.page-shell h1,
.page-shell h2,
.page-shell h3,
.page-shell p,
.page-shell li,
.page-shell ul {
  max-width: var(--prose-width);
  margin-left: auto;
  margin-right: auto;
}

/* ── Hero ── */

.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 1rem;
  margin: 0 0 2.5rem;
  padding: 3rem 0 2.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.hero__mark {
  position: relative;
}

.hero__mark img {
  width: 120px;
  height: 120px;
  border-radius: 24px;
  position: relative;
  z-index: 1;
}

.hero > div {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero__eyebrow {
  display: inline-block;
  margin-bottom: 0.75rem;
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  background: rgba(92, 184, 230, 0.12);
  border: 1px solid rgba(92, 184, 230, 0.24);
  color: var(--halo);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.hero h1 {
  width: 100%;
  margin-bottom: 0.55rem;
  text-align: center;
  font-size: clamp(2.6rem, 5vw, 4.2rem);
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.hero p {
  width: 100%;
  margin-bottom: 0.7rem;
  text-align: center;
}

.hero p strong {
  font-weight: 700;
  color: var(--halo);
}

/* ── Section cards ── */

.section-card {
  margin-top: 2rem;
  padding: 1.6rem 0 0.25rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.section-card > p {
  margin-left: auto;
  margin-right: auto;
}

.section-card > h2 {
  margin-top: 0;
}

.section-card__lead {
  max-width: var(--prose-width);
  margin: 0.5rem 0 1.25rem;
  font-size: var(--deck-size);
  color: var(--text-soft);
  line-height: 1.6;
}

/* ── Card grid ── */

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1rem;
  margin-top: 1.25rem;
}

.card {
  display: block;
  padding: 1.25rem 1.25rem 1.35rem;
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 18px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.045), rgba(255, 255, 255, 0.025));
  transition: transform 140ms ease, border-color 140ms ease, background 140ms ease;
}

.card:hover {
  transform: translateY(-2px);
  border-color: rgba(92, 184, 230, 0.24);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(92, 184, 230, 0.03));
}

.card h3 {
  margin-top: 0;
  margin-bottom: 0.45rem;
  font-size: 1.12rem;
}

.card p {
  margin: 0;
  font-size: var(--card-size);
  max-width: none;
}

.card__badge {
  display: inline-block;
  margin-bottom: 0.5rem;
  padding: 0.15rem 0.5rem;
  border-radius: 6px;
  background: rgba(92, 184, 230, 0.12);
  color: var(--accent);
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: lowercase;
}

/* ── Doc hero (inner pages) ── */

.doc-hero {
  padding: 0.5rem 0 2rem;
  margin-bottom: 2rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  max-width: 100%;
}

.doc-hero__deck {
  margin: 0;
  font-size: var(--deck-size);
  color: #d2e6f5;
}

/* ── Reading controls ── */

.reading-controls-wrap {
  position: fixed;
  left: 0;
  top: 120px;
  display: flex;
  flex-direction: row;
  align-items: flex-start;
  gap: 0;
  z-index: 200;
}

.reading-controls-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 52px;
  padding: 0;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-left: none;
  border-radius: 0 6px 6px 0;
  background: #0e2040;
  color: var(--text-soft);
  cursor: pointer;
  transition: color 140ms ease, background 140ms ease, border-color 140ms ease;
  box-shadow: 2px 0 10px rgba(0, 0, 0, 0.5);
  flex-shrink: 0;
  -webkit-appearance: none;
  appearance: none;
}

.reading-controls-toggle:hover,
.reading-controls-wrap.reading-open .reading-controls-toggle {
  color: var(--text);
  background: #162d54;
  border-color: rgba(255, 255, 255, 0.25);
}

.reading-controls {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.75rem;
  background: #0e2040;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-left: none;
  border-radius: 0 8px 8px 0;
  padding: 1rem;
  box-shadow: 4px 0 20px rgba(0, 0, 0, 0.6);
  opacity: 0;
  pointer-events: none;
  transform: translateX(-8px);
  transition: opacity 0.18s ease, transform 0.18s ease;
  max-width: calc(100vw - 20px);
}

.reading-controls-wrap.reading-open .reading-controls {
  opacity: 1;
  pointer-events: auto;
  transform: translateX(0);
}

.text-size-control,
.page-width-control {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.28rem;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.035);
}

.text-size-control__label,
.page-width-control__label {
  padding: 0 0.35rem 0 0.5rem;
  color: var(--text-soft);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.text-size-control__button {
  width: 2rem;
  height: 2rem;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--text-soft);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  cursor: pointer;
  transition: background 140ms ease, color 140ms ease;
  -webkit-appearance: none;
  appearance: none;
}

.text-size-control__button:nth-of-type(1) { font-size: 0.84rem; }
.text-size-control__button:nth-of-type(2) { font-size: 0.98rem; }
.text-size-control__button:nth-of-type(3) { font-size: 1.1rem; }

.text-size-control__button:hover,
.page-width-control__button:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.05);
}

.text-size-control__button.is-active,
.page-width-control__button.is-active {
  color: var(--halo);
  background: rgba(92, 184, 230, 0.16);
  box-shadow: inset 0 0 0 1px rgba(92, 184, 230, 0.2);
}

.page-width-control__button {
  padding: 0.25rem 0.6rem;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: var(--text-soft);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 0.82rem;
  cursor: pointer;
  transition: background 140ms ease, color 140ms ease;
  -webkit-appearance: none;
  appearance: none;
}

@media (pointer: coarse) {
  .text-size-control__button {
    min-width: 44px;
    min-height: 44px;
  }

  .page-width-control__button {
    min-height: 44px;
  }
}

/* ── Footer ── */

.site-footer {
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  color: var(--text-soft);
}

.site-footer__inner {
  padding: 1.5rem 0 2.5rem;
  font-size: 0.92rem;
}

.site-footer__sponsor {
  margin-top: 0.65rem;
  margin-bottom: 0;
  color: #edf2ff;
  font-size: 0.88rem;
}

.site-footer__sponsor a {
  display: inline-flex;
  align-items: flex-end;
  gap: 0.45rem;
  color: #4fc3f7;
  font-weight: 600;
  vertical-align: bottom;
}

.site-footer__sponsor a:hover {
  color: #90caf9;
}

.site-footer__sponsor-icon {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  vertical-align: middle;
  flex-shrink: 0;
}

.site-footer__sponsor-text {
  display: inline;
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.site-footer__sponsor-north {
  color: var(--text);
}

.site-footer__sponsor-harbor,
.site-footer__sponsor-ai {
  color: #2dd4bf;
}

/* ── Responsive ── */

@media (max-width: 720px) {
  .site-nav,
  .page-shell {
    width: min(calc(100% - 1.5rem), var(--max));
  }

  .site-nav {
    align-items: flex-start;
    flex-direction: row;
    flex-wrap: wrap;
  }

  .site-brand {
    flex: 1;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-collapse {
    max-height: 0;
    overflow: hidden;
    width: 100%;
    flex-basis: 100%;
    transition: max-height 0.25s ease;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
  }

  .site-shell.nav-open .nav-collapse {
    max-height: 80vh;
    overflow-y: auto;
  }

  .site-links {
    justify-content: flex-start;
    gap: 0.5rem;
    padding-top: 0.75rem;
  }

  .hero {
    padding-top: 1.5rem;
  }

  .hero__mark img {
    width: 96px;
    height: 96px;
  }

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

@media (max-width: 480px) {
  .page-prose p,
  .page-prose li,
  .page-shell p,
  .page-shell li,
  .card p,
  .section-card p,
  .hero p {
    font-size: max(var(--body-size), 1.15rem);
  }

  .site-nav,
  .page-shell {
    width: min(calc(100% - 1.25rem), var(--max));
  }

  .page-shell {
    padding: 2rem 0 4rem;
  }
}

@media (pointer: coarse) {
  .site-links a {
    padding: 0.5rem 0.25rem;
    min-height: 44px;
    display: inline-flex;
    align-items: center;
  }
}