/* =================================================================
   Theme tokens — edit these to rebrand the whole site at once.
   Light by default; dark applied automatically via prefers-color-scheme.
   ================================================================= */
:root {
  --accent: #0ea5e9;          /* primary brand color */
  --accent-strong: #0284c7;
  --accent-ink: #ffffff;      /* text on accent */

  --bg: #ffffff;
  --bg-alt: #f4f7fb;
  --surface: #ffffff;
  --border: #e4e9f0;

  --text: #10151c;
  --text-soft: #55606e;

  --radius: 14px;
  --radius-lg: 20px;
  --shadow: 0 6px 24px rgba(16, 30, 54, 0.08);
  --maxw: 1080px;
  --font: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1220;
    --bg-alt: #0f1a2e;
    --surface: #121c2e;
    --border: #22304a;
    --text: #eaf0f8;
    --text-soft: #9fb0c6;
    --shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
  }
}

/* ---------- base ---------- */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3 { line-height: 1.15; margin: 0 0 .5em; letter-spacing: -0.02em; }
p { margin: 0 0 1em; }
a { color: inherit; text-decoration: none; }
code {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  padding: .1em .4em;
  border-radius: 6px;
  font-size: .88em;
}
.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

/* ---------- header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(160%) blur(10px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; }
.brand-mark {
  display: inline-grid;
  place-items: center;
  width: 34px; height: 34px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  flex: none;
}
.brand-mark svg { width: 22px; height: 22px; display: block; }
.brand-name { font-size: 1.05rem; line-height: 1.05; }
.brand-sub { color: var(--accent-strong); font-weight: 600; }

.nav { display: flex; align-items: center; gap: 6px; }
.nav a {
  padding: 8px 14px;
  border-radius: 999px;
  color: var(--text-soft);
  font-weight: 500;
  font-size: .95rem;
  transition: color .15s, background .15s;
}
.nav a:hover { color: var(--text); background: var(--bg-alt); }
.nav .nav-cta {
  color: var(--accent-ink);
  background: var(--accent);
}
.nav .nav-cta:hover { background: var(--accent-strong); color: var(--accent-ink); }

.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(--text);
  border-radius: 2px;
  transition: transform .2s, opacity .2s;
}

/* ---------- hero ---------- */
.hero {
  position: relative;
  padding: clamp(64px, 12vw, 120px) 0 clamp(48px, 9vw, 96px);
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: -20% -10% auto -10%;
  height: 520px;
  background:
    radial-gradient(60% 60% at 20% 20%, color-mix(in srgb, var(--accent) 22%, transparent), transparent 70%),
    radial-gradient(50% 50% at 85% 10%, color-mix(in srgb, var(--accent-strong) 18%, transparent), transparent 70%);
  z-index: -1;
  filter: blur(4px);
}
.eyebrow {
  display: inline-block;
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--accent-strong);
  background: color-mix(in srgb, var(--accent) 12%, transparent);
  padding: 6px 12px;
  border-radius: 999px;
  margin-bottom: 18px;
}
.hero-inner {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: clamp(32px, 5vw, 56px);
  align-items: center;
}
.hero h1 { font-size: clamp(2.1rem, 6vw, 3.7rem); margin-bottom: .35em; }
.lede {
  font-size: clamp(1.05rem, 2.4vw, 1.25rem);
  color: var(--text-soft);
  max-width: 44ch;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.hero-stats {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 28px;
  margin: 34px 0 0;
  padding: 22px 0 0;
  border-top: 1px solid var(--border);
}
.hero-stats li { display: flex; flex-direction: column; }
.hero-stats strong { font-size: 1.5rem; line-height: 1.1; letter-spacing: -0.02em; }
.hero-stats span { font-size: .82rem; color: var(--text-soft); margin-top: 2px; }
.hero-media {
  margin: 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow:
    0 18px 50px rgba(14, 165, 233, 0.20),
    var(--shadow);
  aspect-ratio: 1 / 1;
}
.hero-media img { display: block; width: 100%; height: 100%; object-fit: cover; }

@media (max-width: 860px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-media { max-width: 460px; }
}

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 22px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: transform .12s ease, background .15s, box-shadow .15s;
  border: 1px solid transparent;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--accent); color: var(--accent-ink); box-shadow: var(--shadow); }
.btn-primary:hover { background: var(--accent-strong); }
.btn-ghost { background: transparent; border-color: var(--border); color: var(--text); }
.btn-ghost:hover { background: var(--bg-alt); }

/* ---------- sections ---------- */
.section { padding: clamp(56px, 9vw, 96px) 0; }
.section-alt { background: var(--bg-alt); }
.kicker {
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--accent-strong);
  margin-bottom: 6px;
}
.section h2 { font-size: clamp(1.6rem, 4vw, 2.4rem); }
.section-lede { color: var(--text-soft); max-width: 56ch; }

/* about */
.about-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: 40px;
  margin-top: 24px;
  align-items: start;
}
.fact-list {
  list-style: none;
  margin: 0; padding: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.fact-list li {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
}
.fact-list li:last-child { border-bottom: 0; }
.fact-list span { color: var(--text-soft); }

/* cards (services) */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 18px;
  margin-top: 28px;
}
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: transform .15s ease, box-shadow .15s;
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
.card-ico { font-size: 1.8rem; margin-bottom: 12px; }
.card h3 { font-size: 1.15rem; }
.card p { color: var(--text-soft); margin: 0; font-size: .96rem; }
.card .card-note {
  margin: 10px 0 0;
  font-size: .82rem;
  color: var(--accent-strong);
  background: color-mix(in srgb, var(--accent) 10%, transparent);
  border-radius: 8px;
  padding: 7px 10px;
}

/* certifications */
.certs {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 14px;
  margin-top: 28px;
}
.cert {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
  transition: transform .15s ease, box-shadow .15s;
}
.cert:hover { transform: translateY(-2px); box-shadow: var(--shadow); }
.cert-badge {
  flex: none;
  display: grid;
  place-items: center;
  width: 26px; height: 26px;
  font-size: .8rem;
  font-weight: 700;
  color: var(--accent-strong);
  background: color-mix(in srgb, var(--accent) 14%, transparent);
  border-radius: 999px;
  margin-top: 1px;
}
.cert h3 { font-size: 1rem; margin: 0 0 2px; }
.cert p { margin: 0; color: var(--text-soft); font-size: .88rem; }

/* projects */
.projects {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
  margin-top: 28px;
}
.project {
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform .15s ease, box-shadow .15s, border-color .15s;
}
.project:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
  border-color: color-mix(in srgb, var(--accent) 40%, var(--border));
}
.project-thumb {
  position: relative;
  aspect-ratio: 16 / 10;
  display: grid;
  place-items: center;
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--accent-ink);
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  letter-spacing: .05em;
}
.project-thumb.has-img { background: none; }
.project-thumb img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.project-thumb::after {
  content: attr(data-tag);
  position: absolute;
  top: 12px; left: 12px;
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .04em;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.22);
  color: #fff;
  backdrop-filter: blur(2px);
}
.project-body { padding: 18px 20px 22px; }
.project-body h3 { font-size: 1.15rem; }
.project-body p { color: var(--text-soft); font-size: .95rem; }
.tags { list-style: none; display: flex; flex-wrap: wrap; gap: 6px; margin: 12px 0 0; padding: 0; }
.tags li {
  font-size: .75rem;
  color: var(--text-soft);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 3px 10px;
}

/* faq */
.faq { margin-top: 28px; border-top: 1px solid var(--border); }
.faq-item { border-bottom: 1px solid var(--border); }
.faq-item summary {
  list-style: none;
  cursor: pointer;
  padding: 18px 4px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-weight: 600;
  font-size: 1.02rem;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary:hover { color: var(--accent-strong); }
.faq-mark { flex: none; position: relative; width: 16px; height: 16px; }
.faq-mark::before, .faq-mark::after {
  content: "";
  position: absolute;
  background: var(--accent-strong);
  border-radius: 2px;
  transition: transform .2s ease;
}
.faq-mark::before { top: 7px; left: 0; width: 16px; height: 2px; }
.faq-mark::after { left: 7px; top: 0; width: 2px; height: 16px; }
.faq-item[open] .faq-mark::after { transform: scaleY(0); }
.faq-item p { color: var(--text-soft); margin: 0 0 18px; padding: 0 4px; max-width: 68ch; }

/* scroll-reveal (only active when JS adds .js-reveal; content is visible otherwise) */
.js-reveal .reveal { opacity: 0; transform: translateY(16px); transition: opacity .5s ease, transform .5s ease; }
.js-reveal .reveal.in { opacity: 1; transform: none; }

/* contact */
.contact-inner { text-align: center; }
.contact-inner .section-lede { margin-left: auto; margin-right: auto; }
.contact-actions { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; margin-top: 8px; }

/* footer */
.site-footer { border-top: 1px solid var(--border); padding: 28px 0; }
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--text-soft);
  font-size: .9rem;
}
.to-top:hover { color: var(--text); }

/* ---------- responsive ---------- */
@media (max-width: 760px) {
  .nav {
    position: fixed;
    inset: 64px 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    padding: 12px 20px 20px;
    transform: translateY(-140%);
    transition: transform .25s ease;
    box-shadow: var(--shadow);
  }
  .nav.open { transform: translateY(0); }
  .nav a { padding: 12px 14px; }
  .nav-toggle { display: flex; }
  .nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

  .about-grid { grid-template-columns: 1fr; gap: 24px; }
}

/* accessibility: honour reduced-motion */
@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; transition: none !important; }
}