/* =========================================================
   Airlust Labs Inc — Site Stylesheet
   ========================================================= */

:root {
  --color-ink: #1c1e1f;
  --color-ink-soft: #45494c;
  --color-paper: #faf9f6;
  --color-paper-alt: #f1efe9;
  --color-line: #ded9cf;
  --color-mist: #6d97a5;
  --color-mist-dark: #3f5c66;
  --color-mist-light: #eaf1f2;
  --color-white: #ffffff;

  --font-head: 'Jost', 'Segoe UI', sans-serif;
  --font-body: 'Inter', 'Segoe UI', sans-serif;

  --max-width: 1180px;
  --radius: 4px;
  --transition: 180ms ease;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--color-ink);
  background: var(--color-paper);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--color-mist-dark);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover { color: var(--color-mist); }

h1, h2, h3, h4 {
  font-family: var(--font-head);
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--color-ink);
  margin: 0 0 0.6em;
}

h1 { font-size: clamp(2.1rem, 4vw, 3.2rem); font-weight: 400; letter-spacing: 0.03em; }
h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); }
h3 { font-size: 1.3rem; }

p { margin: 0 0 1em; color: var(--color-ink-soft); }

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

.section { padding: 72px 0; }
.section-alt { background: var(--color-paper-alt); }
.section-dark {
  background: var(--color-ink);
  color: var(--color-paper);
}
.section-dark p { color: #c6c6c6; }
.section-dark h2, .section-dark h3 { color: var(--color-white); }

.eyebrow {
  display: inline-block;
  font-family: var(--font-head);
  font-size: 0.78rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-mist-dark);
  margin-bottom: 0.9em;
}
.section-dark .eyebrow { color: var(--color-mist); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  padding: 13px 28px;
  border-radius: var(--radius);
  font-family: var(--font-head);
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}
.btn-primary {
  background: var(--color-ink);
  color: var(--color-white);
  border-color: var(--color-ink);
}
.btn-primary:hover { background: var(--color-mist-dark); border-color: var(--color-mist-dark); color: var(--color-white); }
.btn-outline {
  background: transparent;
  color: var(--color-ink);
  border-color: var(--color-ink);
}
.btn-outline:hover { background: var(--color-ink); color: var(--color-white); }
.section-dark .btn-outline { color: var(--color-white); border-color: var(--color-white); }
.section-dark .btn-outline:hover { background: var(--color-white); color: var(--color-ink); }

/* ---------- Header / Nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 249, 246, 0.94);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid var(--color-line);
}
.nav-wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand img { height: 34px; width: auto; }
.brand-fallback {
  font-family: var(--font-head);
  font-size: 1.3rem;
  letter-spacing: 0.06em;
}

.main-nav ul {
  list-style: none;
  display: flex;
  gap: 30px;
  margin: 0;
  padding: 0;
}
.main-nav a {
  font-family: var(--font-head);
  font-size: 0.95rem;
  letter-spacing: 0.03em;
  color: var(--color-ink);
}
.main-nav a.active,
.main-nav a:hover { color: var(--color-mist-dark); }

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}
.nav-toggle span {
  display: block;
  width: 26px;
  height: 2px;
  background: var(--color-ink);
  margin: 5px 0;
  transition: transform var(--transition), opacity var(--transition);
}

@media (max-width: 860px) {
  .nav-toggle { display: block; }
  .main-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-paper);
    border-bottom: 1px solid var(--color-line);
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition);
  }
  .main-nav.open { max-height: 400px; }
  .main-nav ul {
    flex-direction: column;
    padding: 10px 24px 24px;
    gap: 4px;
  }
  .main-nav li { border-bottom: 1px solid var(--color-line); }
  .main-nav a { display: block; padding: 12px 0; }
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: 110px 0 90px;
  overflow: hidden;
  background: linear-gradient(180deg, var(--color-paper) 0%, var(--color-mist-light) 100%);
}
.hero .container { position: relative; z-index: 2; max-width: 760px; }
.hero p.lead {
  font-size: 1.15rem;
  color: var(--color-ink-soft);
  max-width: 620px;
}
.hero-actions { display: flex; gap: 16px; margin-top: 28px; flex-wrap: wrap; }
.hero-swirl {
  position: absolute;
  right: -60px;
  top: -40px;
  width: 460px;
  opacity: 0.12;
  z-index: 1;
}

.page-hero {
  padding: 70px 0 50px;
  background: var(--color-mist-light);
  border-bottom: 1px solid var(--color-line);
}
.page-hero p.lead { max-width: 680px; color: var(--color-ink-soft); }

/* ---------- Cards / Grids ---------- */
.grid {
  display: grid;
  gap: 28px;
}
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 860px) {
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
}

.card {
  background: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 30px 26px;
  transition: box-shadow var(--transition), transform var(--transition);
}
.card:hover { box-shadow: 0 12px 28px rgba(28,30,31,0.08); transform: translateY(-3px); }
.card .icon {
  width: 42px; height: 42px;
  margin-bottom: 16px;
  color: var(--color-mist-dark);
}

.stat-row {
  display: flex;
  flex-wrap: wrap;
  gap: 40px;
  margin-top: 40px;
}
.stat { min-width: 140px; }
.stat .num {
  font-family: var(--font-head);
  font-size: 2.2rem;
  color: var(--color-mist-dark);
}
.section-dark .stat .num { color: var(--color-mist); }
.stat .label { font-size: 0.85rem; letter-spacing: 0.04em; text-transform: uppercase; color: var(--color-ink-soft); }
.section-dark .stat .label { color: #b9b9b9; }

/* ---------- Tables ---------- */
table.compare { width: 100%; border-collapse: collapse; margin: 24px 0; }
table.compare th, table.compare td {
  padding: 14px 16px;
  border: 1px solid var(--color-line);
  text-align: left;
  font-size: 0.95rem;
}
table.compare th { background: var(--color-paper-alt); font-family: var(--font-head); }

/* ---------- Forms ---------- */
.form-field { margin-bottom: 20px; }
.form-field label {
  display: block;
  font-family: var(--font-head);
  font-size: 0.9rem;
  letter-spacing: 0.03em;
  margin-bottom: 6px;
}
.form-field input,
.form-field select,
.form-field textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 1rem;
  background: var(--color-white);
  color: var(--color-ink);
}
.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--color-mist-dark);
}
.form-note { font-size: 0.85rem; color: var(--color-ink-soft); }
.form-status {
  margin-top: 18px;
  padding: 14px 16px;
  border-radius: var(--radius);
  font-size: 0.95rem;
  display: none;
}
.form-status.success { display: block; background: #e7f3ea; color: #22633a; border: 1px solid #bfe0c8; }
.form-status.error { display: block; background: #fbe9e7; color: #9a3324; border: 1px solid #f1c3ba; }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--color-ink);
  color: #cfcfcf;
  padding: 56px 0 28px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 32px;
}
@media (max-width: 860px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
.site-footer h4 {
  color: var(--color-white);
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 16px;
}
.site-footer a { color: #cfcfcf; }
.site-footer a:hover { color: var(--color-mist); }
.site-footer ul { list-style: none; padding: 0; margin: 0; }
.site-footer li { margin-bottom: 10px; font-size: 0.92rem; }
.footer-bottom {
  border-top: 1px solid #33373a;
  margin-top: 40px;
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 0.82rem;
  color: #9a9a9a;
}
.footer-brand img { height: 30px; margin-bottom: 12px; filter: invert(1) brightness(1.6); }

/* ---------- Blog ---------- */
.post-list { display: flex; flex-direction: column; gap: 0; }
.post-item {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 24px;
  padding: 26px 0;
  border-bottom: 1px solid var(--color-line);
}
@media (max-width: 640px) { .post-item { grid-template-columns: 1fr; } }
.post-item .date {
  font-family: var(--font-head);
  font-size: 0.85rem;
  color: var(--color-mist-dark);
  letter-spacing: 0.04em;
}
article.post-body { max-width: 740px; margin: 0 auto; }
article.post-body h2 { margin-top: 1.4em; }
article.post-body ul { color: var(--color-ink-soft); }

/* ---------- Breadcrumb ---------- */
.breadcrumb { font-size: 0.85rem; color: var(--color-ink-soft); margin-bottom: 14px; }
.breadcrumb a { color: var(--color-ink-soft); }

/* ---------- Utility ---------- */
.text-center { text-align: center; }
.mt-0 { margin-top: 0; }
.cta-band {
  text-align: center;
  padding: 64px 0;
}
.cta-band h2 { max-width: 700px; margin: 0 auto 0.5em; }
.cta-band p.lead { max-width: 600px; margin: 0 auto 1.6em; }