/* ============================================
   DuoSquare — shared stylesheet
   Modern & minimal
   ============================================ */

:root {
  --ink: #16161d;
  --ink-soft: #55555f;
  --ink-faint: #8a8a94;
  --bg: #ffffff;
  --bg-alt: #f6f6f8;
  --line: #e7e7ec;
  --accent: #4f46e5;
  --accent-soft: #eef2ff;
  --radius: 14px;
  --max: 1080px;
  --font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

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

/* ---------- Header ---------- */
header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.nav {
  display: flex; align-items: center; justify-content: space-between;
  height: 68px;
}
.brand {
  display: flex; align-items: center; gap: 10px;
  text-decoration: none; color: var(--ink);
  font-weight: 700; font-size: 1.15rem; letter-spacing: -.02em;
}
.brand svg { display: block; }
.nav-links { display: flex; gap: 28px; align-items: center; list-style: none; }
.nav-links a {
  text-decoration: none; color: var(--ink-soft);
  font-size: .92rem; font-weight: 500;
  transition: color .15s;
}
.nav-links a:hover, .nav-links a.active { color: var(--ink); }
.nav-links a.btn-nav {
  color: #fff; background: var(--ink);
  padding: 9px 18px; border-radius: 999px;
  transition: background .15s;
}
.nav-links a.btn-nav:hover { background: var(--accent); }

/* mobile nav */
.nav-toggle { display: none; background: none; border: 0; cursor: pointer; padding: 8px; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--ink); margin: 5px 0; transition: .2s; }

@media (max-width: 760px) {
  .nav-toggle { display: block; }
  .nav-links {
    display: none; position: absolute; top: 68px; left: 0; right: 0;
    background: #fff; border-bottom: 1px solid var(--line);
    flex-direction: column; padding: 20px 24px; gap: 18px;
    align-items: flex-start;
  }
  .nav-links.open { display: flex; }
}

/* ---------- Hero ---------- */
.hero { padding: 110px 0 90px; }
.hero .eyebrow {
  display: inline-block; font-size: .8rem; font-weight: 600;
  letter-spacing: .08em; text-transform: uppercase;
  color: var(--accent); background: var(--accent-soft);
  padding: 6px 14px; border-radius: 999px; margin-bottom: 24px;
}
.hero h1 {
  font-size: clamp(2.4rem, 5.5vw, 4rem);
  font-weight: 800; letter-spacing: -.03em; line-height: 1.1;
  max-width: 15ch;
}
.hero h1 em { font-style: normal; color: var(--accent); }
.hero p.lead {
  margin-top: 24px; font-size: 1.15rem; color: var(--ink-soft);
  max-width: 54ch;
}
.hero-actions { margin-top: 40px; display: flex; gap: 14px; flex-wrap: wrap; }

/* Page hero (inner pages) */
.page-hero { padding: 80px 0 50px; }
.page-hero h1 { font-size: clamp(2rem, 4.5vw, 3rem); font-weight: 800; letter-spacing: -.03em; }
.page-hero p { margin-top: 16px; font-size: 1.1rem; color: var(--ink-soft); max-width: 60ch; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-block; text-decoration: none; font-weight: 600;
  font-size: .95rem; padding: 13px 26px; border-radius: 999px;
  transition: transform .15s, background .15s, color .15s;
  border: 1.5px solid transparent; cursor: pointer;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--ink); color: #fff; }
.btn-primary:hover { background: var(--accent); }
.btn-ghost { border-color: var(--line); color: var(--ink); background: transparent; }
.btn-ghost:hover { border-color: var(--ink); }

/* ---------- Sections ---------- */
section { padding: 80px 0; }
section.alt { background: var(--bg-alt); }
.section-head { max-width: 640px; margin-bottom: 48px; }
.section-head .kicker {
  font-size: .8rem; font-weight: 600; letter-spacing: .08em;
  text-transform: uppercase; color: var(--accent); margin-bottom: 10px;
}
.section-head h2 { font-size: clamp(1.6rem, 3.2vw, 2.2rem); font-weight: 750; letter-spacing: -.02em; }
.section-head p { margin-top: 12px; color: var(--ink-soft); }

/* ---------- Cards ---------- */
.grid { display: grid; gap: 22px; }
.grid.cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid.cols-2 { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 900px) { .grid.cols-3 { grid-template-columns: 1fr 1fr; } }
@media (max-width: 620px) { .grid.cols-3, .grid.cols-2 { grid-template-columns: 1fr; } }

.card {
  background: var(--bg); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 30px 28px;
  transition: box-shadow .2s, transform .2s;
}
.card:hover { box-shadow: 0 10px 30px rgba(22,22,29,.07); transform: translateY(-2px); }
.card .icon {
  width: 44px; height: 44px; border-radius: 11px;
  background: var(--accent-soft); color: var(--accent);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 18px; font-size: 1.2rem;
}
.card h3 { font-size: 1.08rem; font-weight: 650; margin-bottom: 8px; letter-spacing: -.01em; }
.card p { font-size: .93rem; color: var(--ink-soft); }

/* ---------- Stats ---------- */
.stats { display: flex; gap: 40px; flex-wrap: wrap; margin-top: 56px; padding-top: 40px; border-top: 1px solid var(--line); }
.stat .num { font-size: 2rem; font-weight: 800; letter-spacing: -.02em; }
.stat .label { font-size: .85rem; color: var(--ink-faint); margin-top: 2px; }

/* ---------- Steps / process ---------- */
.steps { counter-reset: step; display: grid; gap: 22px; grid-template-columns: repeat(4, 1fr); }
@media (max-width: 900px) { .steps { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .steps { grid-template-columns: 1fr; } }
.step { position: relative; padding: 26px 22px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--bg); }
.step::before {
  counter-increment: step; content: "0" counter(step);
  font-size: .8rem; font-weight: 700; color: var(--accent);
  display: block; margin-bottom: 12px; letter-spacing: .05em;
}
.step h3 { font-size: 1rem; font-weight: 650; margin-bottom: 6px; }
.step p { font-size: .9rem; color: var(--ink-soft); }

/* ---------- CTA band ---------- */
.cta-band {
  background: var(--ink); color: #fff;
  border-radius: 20px; padding: 60px 48px;
  display: flex; align-items: center; justify-content: space-between;
  gap: 30px; flex-wrap: wrap;
}
.cta-band h2 { font-size: clamp(1.5rem, 3vw, 2rem); font-weight: 750; letter-spacing: -.02em; max-width: 22ch; }
.cta-band .btn-primary { background: #fff; color: var(--ink); }
.cta-band .btn-primary:hover { background: var(--accent-soft); }

/* ---------- Prose (about page) ---------- */
.prose { max-width: 680px; }
.prose p { margin-bottom: 20px; color: var(--ink-soft); font-size: 1.02rem; }
.prose p strong { color: var(--ink); }

/* ---------- Values list ---------- */
.value-row { display: flex; gap: 20px; padding: 26px 0; border-bottom: 1px solid var(--line); }
.value-row:last-child { border-bottom: 0; }
.value-row .v-num { font-weight: 700; color: var(--accent); font-size: .9rem; min-width: 36px; padding-top: 3px; }
.value-row h3 { font-size: 1.05rem; font-weight: 650; margin-bottom: 4px; }
.value-row p { font-size: .93rem; color: var(--ink-soft); }

/* ---------- Contact ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1.3fr; gap: 56px; align-items: start; }
@media (max-width: 800px) { .contact-grid { grid-template-columns: 1fr; } }

.contact-info h3 { font-size: 1.05rem; font-weight: 650; margin-bottom: 6px; }
.contact-info .item { margin-bottom: 28px; }
.contact-info a { color: var(--accent); text-decoration: none; font-weight: 500; }
.contact-info a:hover { text-decoration: underline; }
.contact-info p { color: var(--ink-soft); font-size: .95rem; }

form .field { margin-bottom: 18px; }
form label { display: block; font-size: .88rem; font-weight: 600; margin-bottom: 7px; }
form input, form textarea, form select {
  width: 100%; padding: 13px 15px; font: inherit; font-size: .95rem;
  border: 1.5px solid var(--line); border-radius: 10px;
  background: var(--bg); color: var(--ink);
  transition: border-color .15s;
}
form input:focus, form textarea:focus, form select:focus {
  outline: none; border-color: var(--accent);
}
form textarea { min-height: 140px; resize: vertical; }
.form-note { font-size: .82rem; color: var(--ink-faint); margin-top: 12px; }

/* ---------- Blog ---------- */
.post-card { display: flex; flex-direction: column; }
.post-card a.title-link { text-decoration: none; color: var(--ink); }
.post-card a.title-link:hover h3 { color: var(--accent); }
.post-meta { font-size: .8rem; color: var(--ink-faint); margin-bottom: 10px; }
.post-tag {
  display: inline-block; font-size: .72rem; font-weight: 600;
  color: var(--accent); background: var(--accent-soft);
  padding: 3px 10px; border-radius: 999px; margin-right: 6px;
}
.post-card .read-more { margin-top: auto; padding-top: 14px; font-size: .88rem; font-weight: 600; color: var(--accent); text-decoration: none; }
.post-card .read-more:hover { text-decoration: underline; }

article.post { max-width: 720px; margin: 0 auto; padding: 60px 0 40px; }
article.post h1 { font-size: clamp(1.9rem, 4vw, 2.6rem); font-weight: 800; letter-spacing: -.03em; line-height: 1.15; margin: 14px 0 10px; }
article.post .post-meta { margin-bottom: 34px; }
article.post h2 { font-size: 1.35rem; font-weight: 700; letter-spacing: -.01em; margin: 36px 0 12px; }
article.post p { color: var(--ink-soft); margin-bottom: 18px; font-size: 1.02rem; }
article.post p strong { color: var(--ink); }
.post-back { display: inline-block; font-size: .88rem; font-weight: 600; color: var(--accent); text-decoration: none; margin-bottom: 8px; }
.post-back:hover { text-decoration: underline; }

/* ---------- Footer ---------- */
footer { border-top: 1px solid var(--line); padding: 48px 0 40px; margin-top: 40px; }
.footer-inner { display: flex; justify-content: space-between; align-items: center; gap: 20px; flex-wrap: wrap; }
.footer-inner .brand { font-size: 1rem; }
footer nav { display: flex; gap: 22px; }
footer nav a { color: var(--ink-soft); text-decoration: none; font-size: .88rem; }
footer nav a:hover { color: var(--ink); }
footer .copy { font-size: .82rem; color: var(--ink-faint); width: 100%; margin-top: 18px; }

/* ---------- Reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity .6s ease, transform .6s ease; }
.reveal.visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}