:root {
  --bg: #ffffff;
  --bg-alt: #f7f8fa;
  --fg: #111418;
  --muted: #5b6470;
  --border: #e5e7eb;
  --brand-navy: #000051;
  --accent: #ff6b03;
  --accent-dark: #d85700;
  --radius: 10px;
  --maxw: 1280px;
  --maxw-narrow: 820px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, Roboto,
    "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font);
  color: var(--fg);
  background: var(--bg);
  line-height: 1.6;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-dark); text-decoration: underline; }

h1, h2, h3 { line-height: 1.2; letter-spacing: -0.01em; margin: 0 0 .6em; }
h1 { font-size: clamp(2rem, 4vw, 3rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); }
h3 { font-size: 1.15rem; }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 2rem; }
.container.narrow { max-width: var(--maxw-narrow); }
@media (max-width: 700px) { .container { padding: 0 1rem; } }
.muted { color: var(--muted); }
.accent { color: var(--accent); }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 10;
  background: rgba(255,255,255,.85);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--border);
}
.nav {
  display: flex; align-items: center; justify-content: space-between;
  padding-top: .25rem; padding-bottom: .25rem;
  min-height: 72px;
}
.brand {
  display: flex; align-items: center;
  color: var(--fg); font-weight: 600; font-size: 1.05rem;
}
.brand:hover { text-decoration: none; }
.brand img { height: 44px; width: auto; display: block; }
@media (max-width: 600px) {
  .nav { min-height: 56px; }
  .brand img { height: 32px; }
}
#primary-nav { display: flex; align-items: center; }
#primary-nav a {
  color: var(--fg); margin-left: 1.5rem; font-size: .95rem;
}

/* Hamburger button - hidden on desktop */
.nav-toggle {
  display: none;
  background: transparent; border: 0; padding: 8px;
  cursor: pointer; width: 40px; height: 40px;
  flex-direction: column; justify-content: center; gap: 5px;
}
.nav-toggle span {
  display: block; width: 22px; height: 2px;
  background: var(--fg); border-radius: 2px;
  transition: transform .2s ease, opacity .2s ease;
}

@media (max-width: 760px) {
  .nav { flex-wrap: wrap; }
  .nav-toggle { display: flex; }
  #primary-nav {
    flex-basis: 100%;
    flex-direction: column; align-items: stretch;
    overflow: hidden;
    max-height: 0;
    transition: max-height .25s ease;
    border-top: 1px solid transparent;
  }
  #primary-nav a {
    margin: 0; padding: .9rem 1rem; font-size: 1rem;
    border-bottom: 1px solid var(--border);
  }
  #primary-nav a:last-child { border-bottom: 0; }
  body.nav-open #primary-nav {
    max-height: 70vh;
    border-top-color: var(--border);
  }
  body.nav-open .nav-toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  body.nav-open .nav-toggle span:nth-child(2) { opacity: 0; }
  body.nav-open .nav-toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
}

/* Hero */
.hero {
  padding: 5rem 0 3.5rem;
  background: linear-gradient(180deg, #f7f8fa 0%, #ffffff 100%);
  border-bottom: 1px solid var(--border);
}
.hero h1 { font-size: clamp(2.2rem, 5vw, 3.6rem); }
.hero .lead {
  font-size: 1.2rem; color: var(--muted);
  max-width: 640px; margin: 1rem 0 1.75rem;
}

/* Buttons */
.btn {
  display: inline-block; padding: .7rem 1.1rem; border-radius: var(--radius);
  font-weight: 500; font-size: .95rem; margin-right: .5rem;
  border: 1px solid transparent; cursor: pointer;
}
.btn.primary { background: var(--accent); color: #fff; }
.btn.primary:hover { background: var(--accent-dark); text-decoration: none; color: #fff; }
.btn.ghost { background: transparent; color: var(--fg); border-color: var(--border); }
.btn.ghost:hover { background: var(--bg-alt); text-decoration: none; }

/* Sections */
.section { padding: 3.5rem 0; }
.section.alt { background: var(--bg-alt); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }

/* Cards grid */
.grid {
  display: grid; gap: 1.25rem;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  margin-top: 1.5rem;
}
.card {
  background: #fff; border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.25rem;
  transition: transform .15s ease, box-shadow .15s ease;
}
.card:hover { transform: translateY(-2px); box-shadow: 0 6px 24px rgba(17,20,24,.06); }
.card h3 { margin-bottom: .4rem; }
.card p { color: var(--muted); margin: 0; }

/* Contact form */
.contact-form { display: grid; gap: 1rem; margin-top: 1.5rem; }
.contact-form label { display: grid; gap: .35rem; font-size: .9rem; color: var(--muted); }
.contact-form input, .contact-form textarea {
  font: inherit; color: var(--fg);
  padding: .7rem .85rem;
  border: 1px solid var(--border); border-radius: var(--radius);
  background: #fff;
}
.contact-form input:focus, .contact-form textarea:focus {
  outline: 2px solid var(--accent); outline-offset: 1px; border-color: var(--accent);
}

/* Blog */
.post-list { list-style: none; padding: 0; margin: 2rem 0 0; }
.post-list li { border-top: 1px solid var(--border); }
.post-list li:last-child { border-bottom: 1px solid var(--border); }
.post-list a {
  display: block; padding: 1.25rem 0; color: var(--fg);
}
.post-list a:hover { text-decoration: none; background: var(--bg-alt); padding-left: .75rem; padding-right: .75rem; }
.post-list h3 { margin: 0 0 .25rem; }
.post-list p { margin: 0; color: var(--muted); }
.post-meta { color: var(--muted); font-size: .9rem; }
.post.container h1 { margin-top: 1rem; }
.post img { max-width: 100%; height: auto; border-radius: var(--radius); }
.post pre {
  background: #0f1419; color: #e6e6e6; padding: 1rem;
  border-radius: var(--radius); overflow-x: auto; font-size: .9rem;
}
.post code { background: var(--bg-alt); padding: .15rem .35rem; border-radius: 4px; font-size: .9em; }
.post pre code { background: transparent; padding: 0; }

/* Footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem 0; margin-top: 2rem;
  color: var(--muted); font-size: .9rem;
}
.footer-inner { display: flex; justify-content: space-between; flex-wrap: wrap; gap: .5rem; }
.footer-inner p { margin: 0; }

@media (max-width: 600px) {
  .hero { padding: 3rem 0 2.5rem; }
  .section { padding: 2.5rem 0; }
}