/* =====================================================================
   Northaven — styles.css
   Order: reset/base -> tokens -> typography -> layout -> components
          -> sections -> utilities -> media queries -> reduced-motion
   All design tokens per DESIGN_SPEC.md §2–4 live in :root.
   ===================================================================== */

/* ------------------------------------------------------------- Reset */
*, *::before, *::after { box-sizing: border-box; margin: 0; }
img, svg { display: block; max-width: 100%; }
body { -webkit-font-smoothing: antialiased; }
ul { list-style: none; padding: 0; }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; color: inherit; }

/* ------------------------------------------------------------ Tokens */
:root {
  font-size: 16px;

  /* Color */
  --bg: #0B0D0F;
  --surface-1: #141719;
  --surface-2: #1D2124;
  --border: #2A2F33;
  --text: #F4F5F3;
  --text-muted: #A8AEB2;
  --text-faint: #6B7176;
  --accent: #C6F24E;
  --accent-press: #A9D63B;
  --accent-2: #8B7CF6;
  --accent-2-soft: #5B4FB0;

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, "Apple Color Emoji", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;

  /* Spacing (8px base) */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --space-7: 3rem;
  --space-8: 4rem;
  --space-9: 6rem;
  --space-10: 8rem;

  /* Radius */
  --radius-sm: 6px;
  --radius-md: 14px;
  --radius-lg: 24px;
  --radius-pill: 999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.4);
  --shadow-md: 0 8px 24px rgba(0,0,0,0.45);
  --shadow-lg: 0 24px 60px rgba(0,0,0,0.55);
  --ring-accent: 0 0 0 3px rgba(198,242,78,0.35);

  /* Motion */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --dur: 0.25s;

  /* Layout */
  --nav-h: 68px;
  --container: 1200px;
}

/* -------------------------------------------------------- Typography */
html { scroll-behavior: smooth; scroll-padding-top: 84px; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--text);
  background: var(--bg);
  overflow-x: hidden;
}
h1, h2, h3 { text-wrap: balance; }
p { text-wrap: pretty; }

h1 {
  font-size: clamp(2.75rem, 7vw, 5.5rem);
  font-weight: 700; line-height: 1.02; letter-spacing: -0.03em;
  max-width: 18ch;
}
h2 {
  font-size: clamp(2rem, 4vw, 3.25rem);
  font-weight: 700; line-height: 1.06; letter-spacing: -0.02em;
  max-width: 24ch;
}
h3 { font-size: 1.375rem; font-weight: 600; line-height: 1.2; letter-spacing: -0.01em; }

/* --------------------------------------------------------- Utilities */
.accent { color: var(--accent); }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem; font-weight: 600; line-height: 1.4;
  letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--text-muted);
}
.eyebrow--accent { color: var(--accent); }

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

.skip-link {
  position: absolute; left: -999px; top: 0; z-index: 1000;
  background: var(--accent); color: var(--bg);
  padding: var(--space-2) var(--space-4); border-radius: var(--radius-sm);
  font-weight: 600;
}
.skip-link:focus { left: var(--space-4); top: var(--space-4); }

:focus-visible { outline: none; box-shadow: var(--ring-accent); border-radius: var(--radius-sm); }

.link-arrow {
  display: inline-flex; align-items: center; gap: var(--space-2);
  color: var(--accent); font-weight: 600; font-size: 0.9375rem;
}
.link-arrow span { transition: transform var(--dur) var(--ease); }
.link-arrow:hover span { transform: translateX(3px); }

/* ---------------------------------------------------------- Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: var(--space-2);
  font-size: 0.9375rem; font-weight: 600; letter-spacing: 0.01em;
  line-height: 1;
  padding: 0.85em 1.5em;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease),
              color var(--dur) var(--ease), transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.btn--sm { padding: 0.6em 1.1em; }
.btn--primary { background: var(--accent); color: var(--bg); }
.btn--primary:hover { background: var(--accent-press); transform: translateY(-1px); box-shadow: var(--shadow-sm); }
.btn--primary:active { transform: translateY(0); }
.btn--ghost { background: transparent; color: var(--text); border-color: var(--border); }
.btn--ghost:hover { border-color: var(--accent); color: var(--accent); }

/* ------------------------------------------------------------ Layout */
.container {
  width: 100%; max-width: var(--container);
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 5vw, 3rem);
}
.section { padding-block: var(--space-7); }

.section__head { max-width: 40ch; margin-bottom: var(--space-7); }
.section__head .section__title { margin-top: var(--space-3); }
.section__intro { margin-top: var(--space-4); color: var(--text-muted); }
.section__head--row {
  max-width: none; display: flex; align-items: flex-end;
  justify-content: space-between; gap: var(--space-5);
}
.section__title { color: var(--text); }

/* -------------------------------------------------------------- Nav */
.nav {
  position: sticky; top: 0; z-index: 100;
  height: var(--nav-h);
  display: flex; align-items: center;
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.nav.scrolled {
  background: rgba(11,13,15,0.72);
  backdrop-filter: blur(12px);
  border-bottom-color: var(--border);
}
.nav__inner { display: flex; align-items: center; justify-content: space-between; gap: var(--space-5); }
.nav__brand { display: inline-flex; align-items: center; }
.nav__name { position: relative; font-weight: 600; font-size: 1.0625rem; letter-spacing: -0.01em; padding-left: 18px; }
.nav__name::before {
  content: ""; position: absolute; left: 0; top: 50%; transform: translateY(-50%);
  width: 10px; height: 10px; border-radius: 3px; background: var(--accent);
}
.nav__links { display: flex; align-items: center; gap: var(--space-6); }
.nav__list { display: flex; align-items: center; gap: var(--space-5); }
.nav__link {
  position: relative;
  font-size: 0.9375rem; font-weight: 500;
  color: var(--text-muted);
  transition: color var(--dur) var(--ease);
}
.nav__link::after {
  content: ""; position: absolute; left: 0; bottom: -6px;
  width: 100%; height: 2px; background: var(--accent);
  transform: scaleX(0); transform-origin: left;
  transition: transform var(--dur) var(--ease);
}
.nav__link:hover { color: var(--text); }
.nav__link:hover::after,
.nav__link.active::after { transform: scaleX(1); }
.nav__link.active { color: var(--text); }

.nav__toggle {
  display: none;
  width: 44px; height: 44px; padding: 11px;
  background: transparent; border: none; cursor: pointer;
}
.nav__bar { display: block; width: 100%; height: 2px; background: var(--text); border-radius: 2px; transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease); }
.nav__bar + .nav__bar { margin-top: 5px; }
body.nav-open .nav__bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
body.nav-open .nav__bar:nth-child(2) { opacity: 0; }
body.nav-open .nav__bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* -------------------------------------------------- Mobile overlay */
.nav-overlay {
  position: fixed; inset: 0; z-index: 90;
  background: rgba(11,13,15,0.98);
  backdrop-filter: blur(12px);
  display: flex; align-items: center; justify-content: center;
  opacity: 0; visibility: hidden;
  transition: opacity var(--dur) var(--ease), visibility var(--dur) var(--ease);
}
body.nav-open .nav-overlay { opacity: 1; visibility: visible; }
.nav-overlay__nav { display: flex; flex-direction: column; align-items: center; gap: var(--space-5); }
.nav-overlay__link { font-size: 1.5rem; font-weight: 600; color: var(--text); }
.nav-overlay__link:hover { color: var(--accent); }
.nav-overlay__cta { margin-top: var(--space-3); }

/* ------------------------------------------------------------- Hero */
.hero {
  position: relative; overflow: hidden;
  min-height: min(88vh, 820px);
  display: flex; align-items: center;
  padding-top: var(--space-9); padding-bottom: var(--space-8);
}
.hero__glow { position: absolute; border-radius: 50%; filter: blur(40px); pointer-events: none; z-index: 0; }
.hero__glow--violet {
  width: 700px; height: 700px; top: -220px; right: -160px;
  background: radial-gradient(closest-side, rgba(139,124,246,0.22), transparent);
}
.hero__glow--lime {
  width: 560px; height: 560px; bottom: -200px; left: -160px;
  background: radial-gradient(closest-side, rgba(198,242,78,0.10), transparent);
}
.hero__inner { position: relative; z-index: 1; }
.hero__title { margin-top: var(--space-4); }
.hero__lead { margin-top: var(--space-5); font-size: 1.25rem; line-height: 1.55; color: var(--text-muted); max-width: 46ch; }
.hero__actions { margin-top: var(--space-6); display: flex; flex-wrap: wrap; gap: var(--space-4); }
.hero__meta { margin-top: var(--space-6); color: var(--text-muted); }

/* ------------------------------------------------------ Trust strip */
.trust {
  background: var(--surface-1);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding-block: var(--space-6);
}
.trust__eyebrow { text-align: center; color: var(--text-muted); }
.trust__logos {
  margin-top: var(--space-5);
  display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center;
  gap: var(--space-5);
}
.trust__logo {
  font-weight: 600; letter-spacing: 0.02em; color: var(--text-muted);
  opacity: 0.7; transition: opacity var(--dur) var(--ease);
}
.trust__logo:hover { opacity: 1; }

/* ----------------------------------------------------------- Cards */
.card {
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease),
              background var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

/* --------------------------------------------------------- Services */
.services__grid { display: grid; gap: var(--space-5); grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.service { display: flex; flex-direction: column; }
.service:hover {
  border-color: rgba(198,242,78,0.4);
  background: var(--surface-2);
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.service__glyph {
  position: relative;
  width: 44px; height: 44px; border-radius: 10px;
  background: var(--surface-2); border: 1px solid var(--border);
  margin-bottom: var(--space-5); overflow: hidden;
}
.service:hover .service__glyph { border-color: rgba(198,242,78,0.4); }
/* distinct CSS-drawn marks per card */
.service__glyph--1::before { content: ""; position: absolute; inset: 0; margin: auto; width: 20px; height: 3px; background: var(--accent); transform: rotate(-45deg); }
.service__glyph--1::after { content: ""; position: absolute; inset: 0; margin: auto; width: 20px; height: 3px; background: var(--accent-2); transform: rotate(45deg); }
.service__glyph--2::before { content: ""; position: absolute; inset: 0; margin: auto; width: 20px; height: 20px; border: 3px solid var(--accent); border-radius: 50%; }
.service__glyph--3::before { content: ""; position: absolute; inset: 0; margin: auto; width: 0; height: 0; border-left: 11px solid transparent; border-right: 11px solid transparent; border-bottom: 18px solid var(--accent); }
.service__glyph--4::before { content: ""; position: absolute; inset: 0; margin: auto; width: 18px; height: 18px; background: linear-gradient(135deg, var(--accent), var(--accent-2)); border-radius: 4px; }
.service__title { margin-bottom: var(--space-2); }
.service__body { color: var(--text-muted); margin-bottom: var(--space-5); flex: 1; }
.service .link-arrow { align-self: flex-start; }

/* ------------------------------------------------------------- Work */
.work__viewall { white-space: nowrap; }
.work__grid { display: grid; gap: var(--space-5); grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.work__tile {
  position: relative;
  aspect-ratio: 4 / 3;
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex; align-items: flex-end;
}
.work__visual { position: absolute; inset: 0; z-index: 0; transition: transform var(--dur) var(--ease); }
.work__visual--1 { background: linear-gradient(135deg, var(--accent-2-soft), var(--bg)), repeating-linear-gradient(45deg, rgba(198,242,78,0.06) 0 12px, transparent 12px 24px); background-blend-mode: screen; }
.work__visual--2 { background: conic-gradient(from 210deg at 70% 30%, var(--accent-2), var(--surface-2), var(--bg)); }
.work__visual--3 { background: linear-gradient(160deg, var(--surface-2), var(--bg)), radial-gradient(circle at 75% 25%, rgba(198,242,78,0.35), transparent 45%); background-blend-mode: screen; }
.work__visual--4 { background: linear-gradient(135deg, var(--accent-2), var(--accent-2-soft)), repeating-linear-gradient(90deg, rgba(0,0,0,0.18) 0 2px, transparent 2px 16px); }
.work__visual--5 { background: linear-gradient(135deg, var(--bg), var(--surface-2)), radial-gradient(circle at 30% 70%, rgba(139,124,246,0.4), transparent 50%); background-blend-mode: screen; }
.work__visual--6 { background: conic-gradient(from 0deg at 40% 60%, var(--accent), var(--surface-2), var(--accent-2-soft), var(--bg)); }
.work__tile::after {
  content: ""; position: absolute; inset: 0; z-index: 1;
  background: linear-gradient(to top, rgba(0,0,0,0.65), transparent 55%);
  transition: background var(--dur) var(--ease);
}
.work__tile:hover .work__visual { transform: scale(1.05); }
.work__tile:hover::after { background: linear-gradient(to top, rgba(0,0,0,0.8), transparent 60%); }
.work__caption { position: relative; z-index: 2; padding: var(--space-5); }
.work__name { color: var(--text); }
.work__cat { color: var(--text-muted); margin-top: var(--space-1); }
.work__badge {
  position: absolute; top: var(--space-4); right: var(--space-4); z-index: 2;
  width: 34px; height: 34px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  background: var(--accent); color: var(--bg); font-weight: 700;
  opacity: 0; transform: translateY(-4px);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
}
.work__tile:hover .work__badge { opacity: 1; transform: translateY(0); }

/* ------------------------------------------------------------ About */
.about__inner { display: grid; gap: var(--space-8); grid-template-columns: 1fr; }
.about__body { color: var(--text-muted); max-width: 62ch; margin-top: var(--space-4); }
.about__content .section__title { margin-top: var(--space-3); }
.about__stats {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-6);
  background: var(--surface-1);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius-lg);
  padding: var(--space-7);
}
.stat__num { font-size: 2.5rem; font-weight: 700; line-height: 1; letter-spacing: -0.02em; color: var(--text); }
.stat__label { margin-top: var(--space-2); color: var(--text-muted); }

/* ----------------------------------------------------- Testimonials */
.testimonials__grid { display: grid; gap: var(--space-5); grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.quote { position: relative; padding-top: var(--space-8); }
.quote::before {
  content: "\201C"; position: absolute; top: var(--space-3); left: var(--space-5);
  font-size: 3rem; line-height: 1; color: var(--accent); opacity: 0.5;
}
.quote__body { font-size: 1.0625rem; line-height: 1.6; color: var(--text); }
.quote__person { display: flex; align-items: center; gap: var(--space-3); margin-top: var(--space-5); }
.quote__avatar {
  width: 40px; height: 40px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: var(--bg); font-weight: 700; font-size: 0.875rem; flex-shrink: 0;
}
.quote__avatar--1 { background: linear-gradient(135deg, var(--accent), var(--accent-2)); }
.quote__avatar--2 { background: linear-gradient(135deg, var(--accent-2), var(--accent-2-soft)); }
.quote__avatar--3 { background: linear-gradient(135deg, var(--accent), var(--accent-press)); }
.quote__meta { display: flex; flex-direction: column; }
.quote__name { font-weight: 600; color: var(--text); }
.quote__role { color: var(--text-muted); margin-top: 2px; }

/* -------------------------------------------------------------- CTA */
.cta { position: relative; overflow: hidden; border-radius: var(--radius-lg); }
.cta__glow {
  position: absolute; top: -120px; right: -80px; z-index: 0;
  width: 420px; height: 420px; border-radius: 50%;
  background: radial-gradient(closest-side, rgba(198,242,78,0.22), transparent);
  filter: blur(30px); pointer-events: none;
}
.cta__content {
  position: relative; z-index: 1;
  max-width: 640px; margin-inline: auto; text-align: center;
  padding: var(--space-9) var(--space-6);
  background: linear-gradient(135deg, var(--surface-2), #16261A);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}
.cta__title { margin: var(--space-3) auto var(--space-4); }
.cta__body { color: var(--text-muted); max-width: 46ch; margin-inline: auto; }
.cta__form {
  display: flex; flex-wrap: wrap; gap: var(--space-3);
  justify-content: center; margin-top: var(--space-6);
}
.cta__input {
  flex: 1 1 260px; min-width: 0;
  background: var(--surface-1); border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 0.85em 1em;
  color: var(--text);
  transition: box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.cta__input::placeholder { color: var(--text-faint); }
.cta__input:focus { outline: none; border-color: var(--accent); box-shadow: var(--ring-accent); }
.cta__note { min-height: 1.4em; margin-top: var(--space-4); color: var(--accent); font-weight: 600; }
.cta__fineprint { margin-top: var(--space-3); color: var(--text-muted); }

/* ----------------------------------------------------------- Footer */
.footer { background: var(--surface-1); border-top: 1px solid var(--border); }
.footer__inner {
  display: grid; gap: var(--space-7); grid-template-columns: 1fr;
  padding-block: var(--space-8);
}
.footer__brand .nav__name { font-size: 1.25rem; }
.footer__blurb { margin-top: var(--space-3); color: var(--text-muted); font-size: 0.875rem; max-width: 34ch; }
.footer__heading { color: var(--text-muted); margin-bottom: var(--space-4); }
.footer__list { display: grid; gap: var(--space-3); }
.footer__list a { color: var(--text-muted); font-size: 0.9375rem; transition: color var(--dur) var(--ease); }
.footer__list a:hover { color: var(--accent); }
.footer__bar { border-top: 1px solid var(--border); }
.footer__bar-inner {
  display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center;
  gap: var(--space-3); padding-block: var(--space-5);
}
.footer__copy { color: var(--text-muted); }
.footer__social { display: flex; gap: var(--space-5); }
.footer__social a { color: var(--text-muted); font-size: 0.875rem; transition: color var(--dur) var(--ease); }
.footer__social a:hover { color: var(--accent); }

/* -------------------------------------------------------- Reveal */
.reveal {
  opacity: 0; transform: translateY(16px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
  transition-delay: var(--reveal-delay, 0ms);
}
.reveal.is-visible { opacity: 1; transform: none; }

/* ====================================================================
   Responsive — mobile-first; media queries only where auto-fit can't
   ==================================================================== */

/* sm — >=560px: inline button rows */
@media (min-width: 560px) {
  .hero__actions { flex-wrap: nowrap; }
}

/* md — >=820px: full nav, 2-col about, 4-col footer, larger padding */
@media (min-width: 820px) {
  .section { padding-block: var(--space-8); }
  .nav__links { display: flex; }
  .nav__toggle { display: none; }
  .about__inner { grid-template-columns: 1.1fr 0.9fr; align-items: center; }
  .footer__inner { grid-template-columns: 1.5fr repeat(3, 1fr); }
}

/* lg — >=1120px: largest section padding, feature-tile spans */
@media (min-width: 1120px) {
  .section { padding-block: var(--space-10); }
  .work__grid { grid-template-columns: repeat(4, 1fr); }
  .work__tile--wide { grid-column: span 2; }
}

/* Below md: hamburger shows, desktop nav hides */
@media (max-width: 819px) {
  .nav__links { display: none; }
  .nav__toggle { display: block; }
  .section__head--row { flex-direction: column; align-items: flex-start; }
  .work__viewall { display: none; }
}

/* Base small screens */
@media (max-width: 559px) {
  .hero__actions .btn { width: 100%; }
}

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