/* ============================================================
   AI Combinator — landing styles
   ============================================================ */

:root {
  --navy:        #051E30;
  --navy-80:     rgba(5, 30, 48, 0.80);
  --navy-60:     rgba(5, 30, 48, 0.60);
  --navy-45:     rgba(5, 30, 48, 0.45);
  --slate:       #4D7388;
  --slate-dark:  #3E6075;
  --canvas:      #ffffff;
  --light:       #F8FAFC;
  --hairline:    rgba(5, 30, 48, 0.10);

  --font-head: "Plus Jakarta Sans", system-ui, sans-serif;
  --font-body: "Inter", system-ui, sans-serif;

  --maxw: 1120px;
  --pad: clamp(1.5rem, 5vw, 4rem);

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--navy);
  background: var(--canvas);
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img, svg { display: block; max-width: 100%; }

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

/* visible keyboard focus, never on mouse */
:focus-visible {
  outline: 2px solid var(--slate);
  outline-offset: 3px;
  border-radius: 2px;
}
:focus:not(:focus-visible) { outline: none; }

.sr-only {
  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: 50%; top: -60px;
  transform: translateX(-50%);
  background: var(--navy); color: #fff;
  padding: 0.6rem 1.1rem; border-radius: 0 0 8px 8px;
  font-size: 0.85rem; z-index: 100;
  transition: top 0.2s var(--ease);
}
.skip-link:focus { top: 0; color: #fff; }

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

/* ============================================================
   Sticky nav — hidden over hero, slides in on scroll
   ============================================================ */
.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.78);
  backdrop-filter: saturate(140%) blur(14px);
  -webkit-backdrop-filter: saturate(140%) blur(14px);
  border-bottom: 1px solid var(--hairline);
  transform: translateY(-100%);
  opacity: 0;
  transition: transform 0.55s var(--ease), opacity 0.45s var(--ease);
  will-change: transform;
}
.nav.is-visible { transform: translateY(0); opacity: 1; }

.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  height: 68px;
}
.nav__logo { height: 26px; width: auto; }
.nav__logo img { height: 100%; width: auto; }

.nav__contact {
  font-family: var(--font-head);
  font-size: 0.92rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--navy);
  position: relative;
  padding-bottom: 2px;
}
.nav__contact::after {
  content: "";
  position: absolute; left: 0; bottom: 0;
  width: 100%; height: 1px;
  background: var(--slate);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s var(--ease);
}
.nav__contact:hover { color: var(--slate); }
.nav__contact:hover::after { transform: scaleX(1); }

/* ============================================================
   Hero
   ============================================================ */
.hero {
  position: relative;
  min-height: 100svh;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 8vh var(--pad) 12vh;
  overflow: hidden;
}

/* faint atmospheric wash behind hero */
.hero::before {
  content: "";
  position: absolute;
  inset: -20% -10% auto -10%;
  height: 70%;
  background: radial-gradient(60% 80% at 50% 0%,
              rgba(77, 115, 136, 0.10), transparent 70%);
  pointer-events: none;
}

.hero__content { position: relative; max-width: 860px; }

.hero__logo {
  width: min(340px, 70vw);
  height: auto;
  margin: 0 auto clamp(2rem, 5vw, 3.2rem);
}

.hero__tagline {
  font-family: var(--font-head);
  font-weight: 600;
  letter-spacing: -0.025em;
  line-height: 1.12;
  color: var(--navy);
  font-size: clamp(1.9rem, 5.4vw, 3.6rem);
  margin: 0 0 1.3rem;
}
.hero__tagline .word { display: inline-block; white-space: nowrap; }
.hero__tagline .dot { color: var(--slate); }

.hero__subtitle {
  font-size: clamp(1.02rem, 1.8vw, 1.25rem);
  font-weight: 400;
  color: var(--navy-60);
  max-width: 38ch;
  margin: 0 auto;
  line-height: 1.55;
}

/* scroll chevron */
.hero__scroll {
  position: absolute;
  bottom: clamp(1.5rem, 5vh, 3rem);
  left: 50%;
  transform: translateX(-50%);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px; height: 44px;
  color: var(--slate);
}
.hero__scroll svg { width: 26px; height: 26px; }
@media (prefers-reduced-motion: no-preference) {
  .hero__scroll svg { animation: nudge 2.2s var(--ease) infinite; }
}
@keyframes nudge {
  0%, 100% { transform: translateY(-3px); opacity: 0.55; }
  50%      { transform: translateY(4px);  opacity: 1; }
}

/* ============================================================
   Divider that opens on scroll
   ============================================================ */
.divider {
  display: grid;
  place-items: center;
  padding: clamp(3.5rem, 9vw, 7rem) 0;
}
.divider__line {
  height: 1px;
  width: min(420px, 60vw);
  background: linear-gradient(90deg, transparent, var(--slate), transparent);
  transform: scaleX(0);
  transform-origin: center;
}

/* ============================================================
   Mid-page gradient mesh break
   ============================================================ */
.mesh {
  position: relative;
  min-height: 62vh;
  display: grid;
  place-items: center;
  text-align: center;
  overflow: hidden;
  background: var(--navy);
  isolation: isolate;
}
.mesh__bg {
  position: absolute;
  inset: -30%;
  z-index: -1;
  background:
    radial-gradient(38% 46% at 22% 32%, rgba(77,115,136,0.85), transparent 60%),
    radial-gradient(42% 50% at 78% 30%, rgba(62,96,117,0.70), transparent 62%),
    radial-gradient(50% 58% at 60% 82%, rgba(40,72,94,0.90), transparent 66%),
    radial-gradient(46% 54% at 16% 78%, rgba(77,115,136,0.45), transparent 64%);
  filter: blur(6px);
  will-change: transform;
}
@media (prefers-reduced-motion: no-preference) {
  .mesh__bg { animation: drift 26s ease-in-out infinite alternate; }
}
@keyframes drift {
  0%   { transform: translate3d(-3%, -2%, 0) scale(1.05) rotate(0deg); }
  50%  { transform: translate3d(3%, 2%, 0)  scale(1.12) rotate(3deg); }
  100% { transform: translate3d(-2%, 3%, 0) scale(1.06) rotate(-2deg); }
}
/* grain/vignette to keep it premium */
.mesh::after {
  content: "";
  position: absolute; inset: 0; z-index: -1;
  background: radial-gradient(120% 100% at 50% 50%,
              transparent 40%, rgba(5,30,48,0.55) 100%);
}
.mesh__line {
  position: relative;
  font-family: var(--font-head);
  font-weight: 500;
  letter-spacing: -0.02em;
  color: #fff;
  font-size: clamp(1.6rem, 4vw, 2.8rem);
  margin: 0;
  padding-inline: var(--pad);
}

/* ============================================================
   Contact
   ============================================================ */
.contact {
  background: var(--light);
  padding: clamp(4.5rem, 11vw, 9rem) 0;
}
.contact__card {
  position: relative;
  max-width: 540px;
  margin: 0 auto;
  background: #fff;
  border: 1px solid var(--hairline);
  border-radius: 14px;
  padding: clamp(2.4rem, 5vw, 3.4rem);
  text-align: center;
  box-shadow: 0 28px 60px -38px rgba(5, 30, 48, 0.35);
  overflow: hidden;
}
.contact__card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  background: linear-gradient(90deg, var(--navy), var(--slate));
}
.contact__eyebrow {
  font-family: var(--font-head);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--slate);
  margin: 0 0 1.4rem;
}
.contact__name {
  font-family: var(--font-head);
  font-weight: 600;
  letter-spacing: -0.02em;
  font-size: clamp(1.4rem, 3vw, 1.85rem);
  margin: 0 0 0.9rem;
  color: var(--navy);
}
.contact__addr {
  font-style: normal;
  color: var(--navy-60);
  line-height: 1.7;
  margin: 0 0 2.1rem;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-head);
  font-weight: 500;
  font-size: 0.98rem;
  letter-spacing: -0.01em;
  color: var(--slate);
  background: transparent;
  border: 1.5px solid var(--slate);
  border-radius: 999px;
  padding: 0.82rem 1.7rem;
  transition: background 0.35s var(--ease), color 0.35s var(--ease),
              transform 0.35s var(--ease);
}
.btn svg { width: 17px; height: 17px; transition: transform 0.35s var(--ease); }
.btn:hover {
  background: var(--slate);
  color: #fff;
  transform: translateY(-2px);
}
.btn:hover svg { transform: translateX(3px); }

/* ============================================================
   Footer
   ============================================================ */
.footer {
  background: var(--canvas);
  padding: clamp(2.5rem, 5vw, 3.5rem) 0;
  text-align: center;
  border-top: 1px solid var(--hairline);
}
.footer__copy {
  font-size: 0.92rem;
  color: var(--navy-60);
  margin: 0 0 0.35rem;
}
.footer__reg {
  font-size: 0.8rem;
  color: var(--navy-45);
  margin: 0;
}

/* ============================================================
   Scroll-reveal base state (JS adds .is-in)
   ============================================================ */
@media (prefers-reduced-motion: no-preference) {
  [data-reveal] {
    opacity: 0;
    transform: translateY(24px);
  }
}