/* ============================================================
   Apila AI — design system
   ============================================================ */

:root {
  --bg: #0a0f0d;
  --bg-alt: #0d1311;
  --bg-card: #101715;
  --border: #1e2a26;
  --border-strong: #2d3d37;
  --text: #e9efed;
  --muted: #96a8a1;
  --accent: #34d399;
  --accent-strong: #10b981;
  --accent-dim: rgba(52, 211, 153, 0.1);
  --radius: 14px;
  --max-w: 1080px;
  --font: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto,
    "Helvetica Neue", Arial, sans-serif;
}

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

html { scroll-behavior: smooth; }

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

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

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

/* ---------- Accessibility ---------- */

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent-strong);
  color: #04110c;
  padding: 10px 18px;
  border-radius: 0 0 8px 0;
  z-index: 100;
}
.skip-link:focus { left: 0; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- Typography ---------- */

h1 {
  font-size: clamp(2.5rem, 6.5vw, 4.25rem);
  line-height: 1.08;
  letter-spacing: -0.025em;
  font-weight: 750;
}

h2 {
  font-size: clamp(1.75rem, 3.5vw, 2.5rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
  font-weight: 700;
  margin-bottom: 16px;
}

h3 {
  font-size: 1.15rem;
  font-weight: 650;
  margin-bottom: 8px;
}

p { color: var(--muted); }
p + p { margin-top: 14px; }

.eyebrow {
  font-size: 0.78rem;
  font-weight: 650;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 14px;
}

.lead,
.section-lead {
  font-size: 1.125rem;
  max-width: 560px;
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid transparent;
  transition: transform 0.15s ease, background 0.15s ease,
    border-color 0.15s ease, color 0.15s ease;
}
.btn:hover { transform: translateY(-1px); }

.btn-primary {
  background: var(--accent-strong);
  color: #04110c;
}
.btn-primary:hover { background: var(--accent); }

.btn-ghost {
  color: var(--text);
  border-color: var(--border-strong);
}
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }

.btn-sm { padding: 9px 20px; font-size: 0.88rem; }
.btn-lg { padding: 16px 34px; font-size: 1.05rem; }

/* ---------- Header / nav ---------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(10, 15, 13, 0.82);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--text);
}

.logo-mark { width: 30px; height: 30px; color: var(--accent); }

.brand-name {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-links a:not(.btn) {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.93rem;
  font-weight: 500;
  transition: color 0.15s ease;
}
.nav-links a:not(.btn):hover { color: var(--text); }
.nav-links a[aria-current="page"] { color: var(--text); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: 0;
  padding: 8px;
  cursor: pointer;
}
.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

/* ---------- Hero ---------- */

.hero {
  position: relative;
  padding: 110px 0 130px;
  text-align: center;
  overflow: hidden;
}

.hero-glow {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(600px 340px at 50% -10%, rgba(16, 185, 129, 0.22), transparent 70%),
    radial-gradient(900px 500px at 50% 115%, rgba(16, 185, 129, 0.07), transparent 70%);
  pointer-events: none;
}

.hero .container { position: relative; }

.hero .lead { margin: 22px auto 0; }

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 36px;
}

/* ---------- Page hero (interior pages) ---------- */

.page-hero {
  position: relative;
  padding: 84px 0 72px;
  overflow: hidden;
}

.page-hero .hero-glow {
  background:
    radial-gradient(560px 300px at 30% -20%, rgba(16, 185, 129, 0.16), transparent 70%);
}

.page-hero .container { position: relative; max-width: 760px; }

.page-hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.4rem);
}

.page-hero .lead { margin-top: 20px; }

/* ---------- Sections ---------- */

.section { padding: 96px 0; }

.section-alt {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.section-head { max-width: 640px; margin-bottom: 52px; }

/* ---------- Cards / services ---------- */

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 20px;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: border-color 0.2s ease, transform 0.2s ease;
}
.card:hover {
  border-color: var(--border-strong);
  transform: translateY(-3px);
}

.card-icon {
  width: 44px;
  height: 44px;
  border-radius: 11px;
  background: var(--accent-dim);
  color: var(--accent);
  display: grid;
  place-items: center;
  margin-bottom: 18px;
}
.card-icon svg { width: 24px; height: 24px; }

/* Clickable cards */

a.card {
  display: block;
  text-decoration: none;
  color: inherit;
}
a.card:hover { border-color: var(--accent); }

.card-cta {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 16px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--accent);
}
.card-cta::after {
  content: "→";
  transition: transform 0.15s ease;
}
a.card:hover .card-cta::after { transform: translateX(3px); }

.section-cta { margin-top: 44px; }

/* Small category tag on cards */

.tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 650;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-dim);
  border-radius: 999px;
  padding: 4px 12px;
  margin-bottom: 14px;
}

/* ---------- Service rows (services overview + detail pages) ---------- */

.service-row {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: start;
  padding: 52px 0;
  border-top: 1px solid var(--border);
}
.service-row:first-of-type { border-top: 0; padding-top: 0; }
.service-row:last-of-type { padding-bottom: 0; }

.service-row .card-icon { margin-bottom: 20px; }
.service-row h2 { font-size: clamp(1.5rem, 2.8vw, 2rem); }
.service-row .btn { margin-top: 24px; }

/* ---------- Tech chips ---------- */

.chip-groups { display: grid; gap: 28px; }

.chip-group h3 {
  font-size: 0.85rem;
  font-weight: 650;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--muted);
  margin-bottom: 12px;
}

.chips { display: flex; flex-wrap: wrap; gap: 10px; }

.chip {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 7px 16px;
  font-size: 0.88rem;
  color: var(--text);
}

/* ---------- FAQ ---------- */

.faq {
  max-width: 720px;
}

.faq details {
  border-bottom: 1px solid var(--border);
  padding: 20px 0;
}

.faq summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  font-weight: 600;
  color: var(--text);
  font-size: 1.02rem;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  color: var(--accent);
  font-size: 1.2rem;
  font-weight: 500;
  flex-shrink: 0;
}
.faq details[open] summary::after { content: "−"; }
.faq details p { margin-top: 12px; max-width: 640px; }

/* ---------- Approach steps ---------- */

.steps {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 20px;
  counter-reset: step;
}

.step {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
}

.step-num {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 14px;
}

/* ---------- About ---------- */

.about-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 48px;
  align-items: start;
}

.values-card { padding: 30px 28px; }

.values-list {
  list-style: none;
  margin-top: 14px;
  display: grid;
  gap: 12px;
}

.values-list li {
  color: var(--muted);
  padding-left: 26px;
  position: relative;
}
.values-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.42em;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--accent-dim);
  border: 1.5px solid var(--accent);
}

/* ---------- Contact ---------- */

.contact-inner {
  text-align: center;
  max-width: 620px;
}
.contact-inner .section-lead { margin: 0 auto 32px; }
.contact-phone {
  margin-top: 20px;
  color: var(--muted);
  font-size: 1.125rem;
}
.contact-phone a {
  color: inherit;
  text-decoration: none;
  transition: color 0.15s ease;
}
.contact-phone a:hover { color: var(--accent); }

/* ---------- Blog ---------- */

.post-meta {
  color: var(--muted);
  font-size: 0.9rem;
  margin-top: 18px;
}
.post-meta .sep { margin: 0 8px; opacity: 0.5; }

.post-body {
  max-width: 720px;
}

.post-body h2 {
  font-size: 1.55rem;
  margin-top: 48px;
}

.post-body ul,
.post-body ol {
  color: var(--muted);
  margin: 16px 0 0 22px;
  display: grid;
  gap: 10px;
}
.post-body li::marker { color: var(--accent); }

.post-body strong { color: var(--text); }

.post-body blockquote {
  border-left: 3px solid var(--accent);
  padding: 4px 0 4px 20px;
  margin-top: 16px;
  font-size: 1.05rem;
  color: var(--text);
}

.post-card .card-cta { margin-top: 18px; }

/* ---------- Footer ---------- */

.site-footer {
  padding: 56px 0 40px;
  border-top: 1px solid var(--border);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 26px;
}

.footer-tagline {
  margin-top: 16px;
  font-size: 0.92rem;
  max-width: 280px;
}

.footer-col h4 {
  font-size: 0.8rem;
  font-weight: 650;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text);
  margin-bottom: 14px;
}

.footer-col a {
  display: block;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.92rem;
  padding: 5px 0;
}
.footer-col a:hover { color: var(--text); }

.footer-col p {
  font-size: 0.92rem;
  padding: 5px 0;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-copy { font-size: 0.85rem; }

/* ---------- Reveal animation ---------- */

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}
.reveal.visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .btn:hover, .card:hover { transform: none; }
}

/* ---------- 404 page ---------- */

.error-page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 24px;
}
.error-page .eyebrow { margin-bottom: 10px; }
.error-page p { margin: 14px 0 30px; }

/* ---------- Responsive ---------- */

@media (max-width: 860px) {
  .about-grid { grid-template-columns: 1fr; gap: 32px; }
  .service-row { grid-template-columns: 1fr; gap: 28px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 480px) {
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
}

@media (max-width: 720px) {
  .nav-toggle { display: flex; }

  .nav-links {
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: var(--bg-alt);
    border-bottom: 1px solid var(--border);
    padding: 12px 24px 20px;
    display: none;
  }

  .nav-open .nav-links { display: flex; }

  .nav-links a:not(.btn) {
    padding: 13px 0;
    border-bottom: 1px solid var(--border);
    font-size: 1rem;
  }

  .nav-links .btn { margin-top: 16px; }

  .nav-open .nav-toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-open .nav-toggle span:nth-child(2) { opacity: 0; }
  .nav-open .nav-toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

  .hero { padding: 76px 0 92px; }
  .section { padding: 72px 0; }
}