/* ===== Nasterra brand design system ===== */
:root {
  --navy: #0E1B3A;
  --navy-2: #16264d;
  --amber: #F5A623;
  --amber-d: #E4873A;
  --teal: #2DA6A0;
  --cloud: #F7F5F1;
  --slate: #5B6472;
  --slate-l: #8A93A3;
  --white: #ffffff;
  --line: #e7e3db;

  --radius: 16px;
  --radius-sm: 10px;
  --maxw: 1140px;
  --ease: cubic-bezier(.22,.61,.36,1);

  --font-head: "Space Grotesk", "Segoe UI", system-ui, sans-serif;
  --font-body: "Inter", "Segoe UI", system-ui, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  color: var(--navy);
  background: var(--white);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3 { font-family: var(--font-head); line-height: 1.12; font-weight: 700; letter-spacing: -0.01em; }
a { color: inherit; text-decoration: none; }
img, svg { display: block; }

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

.eyebrow {
  font-family: var(--font-head);
  text-transform: uppercase;
  letter-spacing: .18em;
  font-size: .72rem;
  font-weight: 600;
  color: var(--teal);
  margin-bottom: 14px;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  font-family: var(--font-head); font-weight: 600; font-size: .95rem;
  background: var(--navy); color: var(--cloud);
  padding: 14px 26px; border-radius: 999px; border: 2px solid var(--navy);
  transition: transform .25s var(--ease), background .25s var(--ease), box-shadow .25s var(--ease);
  cursor: pointer;
}
.btn:hover { transform: translateY(-2px); background: var(--navy-2); box-shadow: 0 10px 26px rgba(14,27,58,.22); }
.btn-sm { padding: 10px 20px; font-size: .88rem; }
.btn-ghost { background: transparent; color: var(--navy); border-color: var(--line); }
.btn-ghost:hover { background: var(--cloud); border-color: var(--navy); box-shadow: none; }
.btn-amber { background: var(--amber); border-color: var(--amber); color: var(--navy); }
.btn-amber:hover { background: var(--amber-d); border-color: var(--amber-d); }

/* ===== Header ===== */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.86);
  backdrop-filter: saturate(160%) blur(10px);
  border-bottom: 1px solid var(--line);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.brand { display: flex; align-items: center; gap: 10px; }
.brand-mark { width: 40px; height: 32px; }
.brand-name { font-family: var(--font-head); font-weight: 700; letter-spacing: .12em; font-size: 1.15rem; color: var(--navy); }
.brand-name.light { color: var(--cloud); }
.nav-links { display: flex; align-items: center; gap: 30px; }
.nav-links a { font-family: var(--font-head); font-weight: 500; font-size: .95rem; color: var(--slate); transition: color .2s; }
.nav-links a:hover { color: var(--navy); }
.nav-links a.btn { color: var(--cloud); }

.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: 0; cursor: pointer; padding: 8px; }
.nav-toggle span { width: 24px; height: 2px; background: var(--navy); border-radius: 2px; transition: .3s var(--ease); }
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ===== Hero ===== */
.hero { padding: 88px 0 64px; overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: center; }
.hero h1 { font-size: clamp(2.4rem, 5vw, 4rem); margin-bottom: 22px; }
.hero h1 .accent { color: var(--amber-d); }
.lede { font-size: 1.15rem; color: var(--slate); max-width: 34em; margin-bottom: 30px; }
.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 26px; }
.tagline { font-family: var(--font-head); font-weight: 500; letter-spacing: .06em; color: var(--teal); font-size: .95rem; }
.tagline.dark { color: var(--teal); }

.hero-visual { display: flex; justify-content: center; }
.hero-mark-card {
  width: 100%; max-width: 360px; aspect-ratio: 1/1;
  background: radial-gradient(120% 120% at 30% 20%, var(--navy-2), var(--navy));
  border-radius: 28px; display: grid; place-items: center;
  box-shadow: 0 30px 60px -20px rgba(14,27,58,.5);
  position: relative; overflow: hidden;
}
.hero-mark-card::after {
  content: ""; position: absolute; inset: 0;
  background: radial-gradient(60% 50% at 78% 22%, rgba(245,166,35,.22), transparent 70%);
}
.hero-mark-card svg { width: 64%; position: relative; z-index: 1; }
.hero-mark-card.small { max-width: 280px; border-radius: 22px; }

/* ===== Trust strip ===== */
.strip { border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); background: var(--cloud); }
.strip-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; padding-top: 26px; padding-bottom: 26px; }
.strip-grid div { display: flex; flex-direction: column; }
.strip-grid strong { font-family: var(--font-head); color: var(--navy); font-size: 1.02rem; }
.strip-grid span { color: var(--slate); font-size: .9rem; }

/* ===== Sections ===== */
.section { padding: 88px 0; }
.section-alt { background: var(--cloud); }
.section-head { max-width: 640px; margin: 0 auto 52px; text-align: center; }
.section-head h2 { font-size: clamp(1.8rem, 3.4vw, 2.6rem); margin-bottom: 14px; }
.section-sub { color: var(--slate); font-size: 1.08rem; }

/* ===== Cards ===== */
.cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.card {
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 30px 26px; transition: transform .3s var(--ease), box-shadow .3s var(--ease), border-color .3s;
}
.card:hover { transform: translateY(-6px); box-shadow: 0 22px 44px -22px rgba(14,27,58,.32); border-color: transparent; }
.card-icon {
  width: 52px; height: 52px; border-radius: 12px; display: grid; place-items: center;
  background: var(--cloud); margin-bottom: 20px;
}
.card-icon svg { width: 30px; height: 30px; fill: none; stroke: var(--navy); stroke-width: 2.4; stroke-linecap: round; stroke-linejoin: round; }
.card h3 { font-size: 1.18rem; margin-bottom: 10px; }
.card p { color: var(--slate); font-size: .96rem; }

/* ===== Steps ===== */
.steps { list-style: none; display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; counter-reset: step; }
.steps li { background: var(--white); border-radius: var(--radius); padding: 28px 24px; border: 1px solid var(--line); position: relative; }
.step-no { font-family: var(--font-head); font-weight: 700; font-size: 1.4rem; color: var(--amber-d); display: block; margin-bottom: 12px; }
.steps h3 { font-size: 1.12rem; margin-bottom: 8px; }
.steps p { color: var(--slate); font-size: .94rem; }

/* ===== About ===== */
.about-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 56px; align-items: center; }
.about-visual { display: flex; justify-content: center; }
.about-copy h2 { font-size: clamp(1.8rem, 3.2vw, 2.5rem); margin-bottom: 18px; }
.about-copy p { color: var(--slate); margin-bottom: 16px; font-size: 1.04rem; }
.about-copy strong { color: var(--navy); }
.about-copy em { font-style: normal; color: var(--amber-d); font-weight: 600; }

/* ===== CTA ===== */
.cta { background: radial-gradient(120% 140% at 20% 10%, var(--navy-2), var(--navy)); color: var(--cloud); padding: 92px 0; text-align: center; }
.cta-inner { max-width: 620px; margin: 0 auto; }
.cta h2 { font-size: clamp(2rem, 4vw, 3rem); margin-bottom: 14px; color: var(--white); }
.cta p { color: rgba(247,245,241,.8); font-size: 1.1rem; margin-bottom: 30px; }

/* ===== Footer ===== */
.site-footer { background: var(--navy); color: var(--cloud); padding: 56px 0 30px; }
.footer-grid { display: flex; justify-content: space-between; gap: 40px; flex-wrap: wrap; padding-bottom: 30px; border-bottom: 1px solid rgba(247,245,241,.12); }
.footer-brand { display: flex; flex-direction: column; gap: 6px; }
.footer-brand .brand-mark { width: 44px; height: 36px; }
.footer-brand .brand-name { margin-top: 6px; }
.footer-tag { color: var(--teal); font-family: var(--font-head); font-size: .9rem; letter-spacing: .05em; }
.footer-links { display: flex; gap: 28px; align-items: flex-start; flex-wrap: wrap; }
.footer-links a { color: rgba(247,245,241,.78); font-family: var(--font-head); font-size: .95rem; transition: color .2s; }
.footer-links a:hover { color: var(--amber); }
.footer-base { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; padding-top: 24px; color: rgba(247,245,241,.55); font-size: .85rem; }

/* ===== Reveal animation ===== */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.in { opacity: 1; transform: none; }

/* ===== Responsive ===== */
@media (max-width: 940px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-visual { order: -1; }
  .hero-mark-card { max-width: 260px; }
  .cards { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .strip-grid { grid-template-columns: repeat(2, 1fr); }
  .about-grid { grid-template-columns: 1fr; }
  .about-visual { order: -1; }
}
@media (max-width: 620px) {
  .container { padding: 0 28px; }
  .strip-grid { padding: 22px 28px; gap: 16px; grid-template-columns: repeat(2, 1fr); }
  .card { padding: 24px 20px; }
  .section-head { padding: 0 4px; }
  .nav-links {
    position: fixed; inset: 72px 0 auto 0; background: var(--white);
    flex-direction: column; align-items: stretch; gap: 0; padding: 8px 24px 20px;
    border-bottom: 1px solid var(--line); transform: translateY(-120%); transition: transform .35s var(--ease);
    box-shadow: 0 20px 40px -20px rgba(14,27,58,.3);
  }
  .nav-links.open { transform: translateY(0); }
  .nav-links a { padding: 14px 0; border-bottom: 1px solid var(--line); }
  .nav-links a.btn { margin-top: 12px; justify-content: center; border-bottom: 2px solid var(--navy); }
  .nav-toggle { display: flex; }
  .cards { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .hero { padding: 56px 0 40px; }
  .section { padding: 60px 0; }
}

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