/* ============================================================
   TOPSAIL — nautical AI transformation
   Palette: abyss navy ↔ chart paper, signal-coral accent
   Type: Fraunces (display) · Inter Tight (body) · JetBrains Mono (labels)
   ============================================================ */

:root {
  --abyss:    #06101A;
  --sea:      #0A1726;
  --sea-2:    #0E1E30;
  --paper:    #F3EEE3;
  --paper-2:  #ECE5D6;
  --ink:      #14202E;
  --ink-soft: #3C4A57;
  --warm:     #ECE6DA;   /* warm white text on dark */
  --warm-dim: #8A99A8;   /* muted text on dark */
  --accent:   #F0653E;   /* signal coral */
  --accent-2: #7FB2C4;   /* faded chart blue */
  --line-dark: rgba(236, 230, 218, 0.12);
  --line-light: rgba(20, 32, 46, 0.14);

  --maxw: 1200px;
  --pad: clamp(20px, 5vw, 64px);
  --r: 14px;

  --f-display: "Fraunces", Georgia, serif;
  --f-body: "Inter Tight", system-ui, sans-serif;
  --f-mono: "JetBrains Mono", ui-monospace, monospace;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--f-body);
  background: var(--abyss);
  color: var(--warm);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img, svg, canvas { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }

/* ---------- typographic helpers ---------- */
.display {
  font-family: var(--f-display);
  font-weight: 380;
  font-optical-sizing: auto;
  line-height: 1.02;
  letter-spacing: -0.015em;
  font-size: clamp(2.4rem, 5.4vw, 4.6rem);
}
.display.light { color: var(--warm); }
.ital { font-style: italic; font-weight: 340; }
.accent-text { color: var(--accent); }

.eyebrow {
  font-family: var(--f-mono);
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.4rem;
}
.eyebrow.ink { color: var(--accent); }
.mono { font-family: var(--f-mono); }

.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding-inline: var(--pad); }
.wrap--narrow { max-width: 820px; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 0.5em;
  font-family: var(--f-body);
  font-size: 0.95rem; font-weight: 500;
  padding: 0.85em 1.5em;
  border-radius: 100px;
  border: 1px solid transparent;
  transition: transform .25s cubic-bezier(.2,.7,.3,1), background .25s, color .25s, border-color .25s;
  white-space: nowrap;
}
.btn--solid { background: var(--accent); color: #1a0c06; }
.btn--solid:hover { transform: translateY(-2px); background: #ff7a55; }
.btn--ghost { border-color: var(--line-dark); color: var(--warm); }
.btn--ghost:hover { border-color: var(--warm-dim); transform: translateY(-2px); }
.btn--lg { font-size: 1.05rem; padding: 1.05em 1.9em; }

/* ============================================================
   NAV
   ============================================================ */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between;
  gap: 1.5rem;
  padding: 1.1rem var(--pad);
  transition: background .3s, border-color .3s, padding .3s;
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: rgba(6, 16, 26, 0.72);
  backdrop-filter: blur(14px) saturate(140%);
  border-bottom: 1px solid var(--line-dark);
  padding-block: 0.8rem;
}
.nav__brand {
  display: flex; align-items: center; gap: 0.6rem;
  font-family: var(--f-display); font-size: 1.4rem; font-weight: 450;
  letter-spacing: -0.01em;
}
.nav__mark { width: 26px; height: 26px; color: var(--accent); }
.nav__links { display: flex; gap: 2rem; }
.nav__links a {
  font-size: 0.92rem; color: var(--warm-dim); position: relative; padding: 2px 0;
  transition: color .2s;
}
.nav__links a::after {
  content: ""; position: absolute; left: 0; bottom: -3px; width: 0; height: 1px;
  background: var(--accent); transition: width .25s;
}
.nav__links a:hover { color: var(--warm); }
.nav__links a:hover::after { width: 100%; }
.nav__cta { font-size: 0.88rem; padding: 0.6em 1.2em; }
.nav__menu { display: none; background: none; border: none; color: var(--warm); font-size: 1.6rem; cursor: pointer; }

/* ============================================================
   HERO
   ============================================================ */
.hero {
  position: relative; min-height: 100svh;
  display: flex; flex-direction: column; justify-content: center;
  padding: 8rem var(--pad) 4rem;
  background:
    radial-gradient(120% 90% at 70% 0%, #0c1d30 0%, var(--abyss) 55%);
  overflow: hidden;
}
.hero__grid { position: absolute; inset: 0; width: 100%; height: 100%; z-index: 0; }
.hero__vignette {
  position: absolute; inset: 0; z-index: 1; pointer-events: none;
  background:
    radial-gradient(80% 60% at 30% 55%, rgba(6,16,26,0) 0%, rgba(6,16,26,.55) 70%, var(--abyss) 100%),
    linear-gradient(to bottom, rgba(6,16,26,.4), rgba(6,16,26,0) 18%, rgba(6,16,26,0) 70%, var(--abyss));
}
.hero__inner { position: relative; z-index: 2; max-width: 900px; }
.hero__title {
  font-family: var(--f-display);
  font-size: clamp(3.4rem, 11vw, 9rem);
  font-weight: 360; line-height: 0.95; letter-spacing: -0.03em;
  margin-bottom: 1.6rem;
}
.hero__title .ital { color: var(--accent); }
.hero__sub {
  font-size: clamp(1.05rem, 1.7vw, 1.3rem); font-weight: 300;
  color: var(--warm-dim); max-width: 560px; line-height: 1.5; margin-bottom: 2.4rem;
}
.hero__cta { display: flex; gap: 0.9rem; flex-wrap: wrap; }
.hero__coords {
  position: absolute; z-index: 2; top: 50%; right: var(--pad); transform: translateY(-50%);
  display: flex; flex-direction: column; gap: 0.5rem; text-align: right;
  font-size: 0.66rem; letter-spacing: 0.18em; color: var(--warm-dim); opacity: .6;
}
.hero__scroll {
  position: absolute; z-index: 2; bottom: 1.8rem; left: var(--pad);
  font-size: 0.7rem; letter-spacing: 0.2em; text-transform: uppercase; color: var(--warm-dim);
  animation: bob 2.4s ease-in-out infinite;
}
@keyframes bob { 0%,100%{transform:translateY(0)} 50%{transform:translateY(5px)} }

/* ============================================================
   MARQUEE
   ============================================================ */
.marquee-wrap {
  background: var(--abyss); border-top: 1px solid var(--line-dark);
  border-bottom: 1px solid var(--line-dark); padding: 2.4rem 0;
}
.marquee-label {
  text-align: center; font-size: 0.7rem; letter-spacing: 0.22em; text-transform: uppercase;
  color: var(--warm-dim); margin-bottom: 0.5rem;
}
.marquee-sub {
  text-align: center; font-size: 0.62rem; letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--warm-dim); opacity: 0.6; margin-bottom: 1.6rem;
}
.marquee { overflow: hidden; -webkit-mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent); mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent); }
.marquee__track {
  display: flex; align-items: center; gap: 2.2rem; width: max-content;
  animation: scroll 38s linear infinite;
  font-family: var(--f-display); font-size: 1.7rem; font-weight: 360; color: var(--warm);
}
.marquee__track i { color: var(--accent); font-style: normal; opacity: .7; }
.marquee__track span { opacity: .82; }
@keyframes scroll { to { transform: translateX(-50%); } }

/* ============================================================
   SECTION SCAFFOLD
   ============================================================ */
.section { padding: clamp(4.5rem, 9vw, 8.5rem) 0; position: relative; }
.section--paper { background: var(--paper); color: var(--ink); }
.section--sea { background: var(--sea); color: var(--warm); }
.section--abyss { background: var(--abyss); color: var(--warm); }
.section--paper .display { color: var(--ink); }
.section__head { margin-bottom: clamp(2.4rem, 5vw, 4rem); max-width: 760px; }

/* ---------- approach ---------- */
.approach__grid {
  display: grid; grid-template-columns: 1.1fr 1fr; gap: clamp(1.6rem, 4vw, 4rem);
  padding-bottom: clamp(2.5rem, 5vw, 4.5rem); border-bottom: 1px solid var(--line-light);
}
.approach__lead { font-family: var(--f-display); font-size: clamp(1.3rem, 2.3vw, 1.85rem); font-weight: 380; line-height: 1.35; color: var(--ink); }
.approach__body { font-size: 1.02rem; line-height: 1.7; color: var(--ink-soft); align-self: end; }
.approach__body em { font-style: italic; color: var(--ink); }

.steps { display: grid; grid-template-columns: repeat(3,1fr); gap: clamp(1.4rem, 3vw, 3rem); margin-top: clamp(2.5rem,5vw,4rem); }
.step__num { font-size: 0.78rem; color: var(--accent); letter-spacing: 0.12em; }
.step h3 { font-family: var(--f-display); font-size: 1.7rem; font-weight: 400; margin: 0.7rem 0 0.6rem; }
.step p { color: var(--ink-soft); line-height: 1.6; font-size: 0.98rem; }

/* ---------- services cards ---------- */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.2rem; }
.card {
  background: var(--sea-2); border: 1px solid var(--line-dark); border-radius: var(--r);
  padding: 2rem 1.8rem 2.2rem; display: flex; flex-direction: column;
  transition: transform .3s cubic-bezier(.2,.7,.3,1), border-color .3s, background .3s;
  position: relative; overflow: hidden;
}
.card::before {
  content: ""; position: absolute; inset: 0; pointer-events: none; opacity: 0;
  background: radial-gradient(120% 80% at 50% -10%, rgba(240,101,62,.14), transparent 60%);
  transition: opacity .35s;
}
.card:hover { transform: translateY(-6px); border-color: rgba(240,101,62,.4); }
.card:hover::before { opacity: 1; }
.card__top { display: flex; align-items: center; justify-content: space-between; margin-bottom: 1.6rem; }
.card__idx { font-size: 0.72rem; color: var(--warm-dim); letter-spacing: 0.15em; }
.card__icon { width: 42px; height: 42px; color: var(--accent-2); }
.card--accent .card__icon { color: var(--accent); }
.card h3 { font-family: var(--f-display); font-size: 1.85rem; font-weight: 400; margin-bottom: 0.35rem; }
.card__tag { font-size: 0.74rem; color: var(--accent); letter-spacing: 0.12em; text-transform: uppercase; margin-bottom: 1rem; }
.card > p { color: var(--warm-dim); line-height: 1.6; font-size: 0.96rem; }
.card__list { list-style: none; margin-top: 1.5rem; padding-top: 1.3rem; border-top: 1px solid var(--line-dark); display: grid; gap: 0.6rem; }
.card__list li { font-size: 0.9rem; color: var(--warm); padding-left: 1.2rem; position: relative; }
.card__list li::before { content: "→"; position: absolute; left: 0; color: var(--accent); }

/* ---------- stats ---------- */
.stats .wrap { display: grid; grid-template-columns: repeat(4,1fr); gap: clamp(1.4rem,3vw,3rem); }
.stat { border-left: 1px solid var(--line-light); padding-left: 1.4rem; }
.stat__num { display: block; font-size: clamp(2.8rem, 5vw, 4.2rem); font-weight: 350; color: var(--ink); line-height: 1; }
.stat__num .u { color: var(--accent); }
.stat__label { display: block; margin-top: 0.9rem; font-size: 0.72rem; letter-spacing: 0.06em; line-height: 1.5; color: var(--ink-soft); text-transform: uppercase; }

/* ---------- manifesto ---------- */
.manifesto { overflow: hidden; }
.manifesto__grid { position: absolute; inset: 0; z-index: 0; opacity: .55; }
.manifesto__inner { position: relative; z-index: 1; max-width: 940px; text-align: center; margin-inline: auto; }
.manifesto .eyebrow { text-align: center; }
.manifesto__quote { font-size: clamp(2rem, 4.6vw, 3.7rem); font-weight: 350; line-height: 1.18; margin-bottom: 2rem; }
.manifesto__by { max-width: 620px; margin: 0 auto; color: var(--warm-dim); font-size: 1.08rem; line-height: 1.65; font-weight: 300; }

/* ---------- work ---------- */
.work__grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 1.2rem; }
.case { background: var(--paper-2); border: 1px solid var(--line-light); border-radius: var(--r); padding: 1.9rem 1.7rem; display: flex; flex-direction: column; transition: transform .3s, box-shadow .3s; }
.case:hover { transform: translateY(-5px); box-shadow: 0 18px 40px -24px rgba(20,32,46,.4); }
.case__sector { font-size: 0.72rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--accent); }
.case__metric { font-size: clamp(1.55rem,2.4vw,1.9rem); font-weight: 400; color: var(--ink); margin: 1rem 0 0.25rem; line-height: 1.05; }
.case__arr { color: var(--accent); padding: 0 0.04em; }
.case__cap { font-style: italic; font-size: 0.9rem; color: var(--ink-soft); margin-bottom: 0.7rem; }
.case__desc { color: var(--ink-soft); line-height: 1.6; font-size: 0.96rem; flex: 1; }
.case__link { font-size: 0.78rem; letter-spacing: 0.08em; color: var(--ink); margin-top: 1.4rem; transition: gap .2s, color .2s; }
.case__link:hover { color: var(--accent); }

/* ---------- testimonials ---------- */
.quotes { display: grid; grid-template-columns: repeat(3,1fr); gap: 1.2rem; }
.quote { background: var(--sea-2); border: 1px solid var(--line-dark); border-radius: var(--r); padding: 1.9rem 1.7rem; display: flex; flex-direction: column; justify-content: space-between; gap: 1.6rem; }
.quote blockquote { font-family: var(--f-display); font-size: 1.18rem; font-weight: 360; line-height: 1.45; color: var(--warm); }
.quote figcaption { display: flex; flex-direction: column; gap: 0.2rem; border-top: 1px solid var(--line-dark); padding-top: 1rem; }
.quote figcaption span { font-size: 0.92rem; color: var(--warm); }
.quote figcaption i { font-size: 0.74rem; color: var(--warm-dim); font-style: normal; letter-spacing: 0.08em; }

/* ---------- faq ---------- */
.accordion { border-top: 1px solid var(--line-light); }
.acc { border-bottom: 1px solid var(--line-light); }
.acc__q {
  width: 100%; background: none; border: none; cursor: pointer; text-align: left;
  display: flex; align-items: center; justify-content: space-between; gap: 1.5rem;
  padding: 1.5rem 0; font-family: var(--f-display); font-size: clamp(1.15rem,2vw,1.5rem);
  font-weight: 400; color: var(--ink); transition: color .2s;
}
.acc__q:hover { color: var(--accent); }
.acc__sign { font-family: var(--f-mono); font-size: 1.4rem; color: var(--accent); transition: transform .3s; flex-shrink: 0; }
.acc.open .acc__sign { transform: rotate(45deg); }
.acc__a { max-height: 0; overflow: hidden; transition: max-height .35s ease; }
.acc__a p { padding-bottom: 1.5rem; color: var(--ink-soft); line-height: 1.7; max-width: 64ch; font-size: 1.0rem; }

/* ---------- cta ---------- */
.cta__inner { text-align: center; max-width: 760px; margin-inline: auto; }
.cta__title { margin-bottom: 1.2rem; }
.cta__sub { color: var(--warm-dim); font-size: 1.15rem; font-weight: 300; margin-bottom: 2.2rem; }

/* ============================================================
   FOOTER
   ============================================================ */
.footer { background: var(--abyss); border-top: 1px solid var(--line-dark); padding-top: clamp(3.5rem,6vw,5.5rem); overflow: hidden; }
.footer__top { display: grid; grid-template-columns: 1fr 1.2fr; gap: 2.5rem; padding-bottom: 3rem; }
.footer__lede { font-family: var(--f-display); font-size: 1.5rem; font-weight: 380; max-width: 360px; line-height: 1.3; }
.footer__coord { margin-top: 1.2rem; font-size: 0.72rem; color: var(--warm-dim); letter-spacing: 0.12em; }
.footer__nav { display: grid; grid-template-columns: repeat(3,1fr); gap: 1.5rem; }
.footer__h { font-size: 0.7rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--accent); margin-bottom: 1rem; }
.footer__nav a { display: block; color: var(--warm-dim); font-size: 0.94rem; padding: 0.32rem 0; transition: color .2s; }
.footer__nav a:hover { color: var(--warm); }
.footer__wordmark {
  font-family: var(--f-display); font-weight: 360; text-align: center;
  font-size: clamp(4rem, 22vw, 19rem); line-height: 0.8; letter-spacing: -0.03em;
  background: linear-gradient(180deg, rgba(236,230,218,.16), rgba(236,230,218,.02));
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
  padding-top: 1rem; user-select: none;
}
.footer__legal { display: flex; justify-content: space-between; gap: 1rem; padding: 2rem 0 2.5rem; border-top: 1px solid var(--line-dark); margin-top: 1rem; font-size: 0.72rem; color: var(--warm-dim); letter-spacing: 0.08em; flex-wrap: wrap; }

/* ============================================================
   REVEAL ANIMATION
   ============================================================ */
.reveal { opacity: 0; transform: translateY(22px); transition: opacity .7s cubic-bezier(.2,.7,.3,1), transform .7s cubic-bezier(.2,.7,.3,1); }
.reveal.in { opacity: 1; transform: none; }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 940px) {
  .nav__links, .nav__cta { display: none; }
  .nav__menu { display: block; }
  .approach__grid { grid-template-columns: 1fr; }
  .steps, .cards, .work__grid, .quotes { grid-template-columns: 1fr; }
  .stats .wrap { grid-template-columns: 1fr 1fr; gap: 2rem; }
  .footer__top { grid-template-columns: 1fr; }
  .hero__coords { display: none; }
}
@media (max-width: 560px) {
  .stats .wrap { grid-template-columns: 1fr; }
  .footer__nav { grid-template-columns: 1fr 1fr; }
  .hero__cta { flex-direction: column; align-items: stretch; }
  .btn { justify-content: center; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; }
}