:root {
  --blue: #1565c0;
  --blue-dark: #0d3f80;
  --ink: #1a2330;
  --muted: #5b6875;
  --bg: #ffffff;
  --bg-alt: #f4f7fb;
  --border: #e2e8f0;
  --radius: 14px;
  --maxw: 1080px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica,
    Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
}

h1, h2, h3 { line-height: 1.2; }
a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }

/* ---------- Nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.8rem 1.4rem;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.brand { font-weight: 800; font-size: 1.25rem; color: var(--ink); }
.brand span { color: var(--blue); }
.nav nav { display: flex; align-items: center; gap: 1.3rem; }
.nav nav a { color: var(--ink); font-weight: 500; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  padding: 0.8rem 1.4rem;
  border-radius: 10px;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .05s ease, box-shadow .2s ease, background .2s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-sm { padding: 0.45rem 0.9rem; font-size: 0.9rem; }
.btn-primary { background: var(--blue); color: #fff; box-shadow: 0 6px 18px rgba(21,101,192,0.28); }
.btn-primary:hover { background: var(--blue-dark); }
.btn-ghost { background: #fff; color: var(--blue); border-color: var(--blue); }
.btn-sm.btn { background: var(--blue); color: #fff; }

/* ---------- Hero ---------- */
.hero {
  background: linear-gradient(160deg, #eaf2fd 0%, #f7fbff 60%, #ffffff 100%);
  border-bottom: 1px solid var(--border);
  padding: 4.5rem 1.4rem 4rem;
}
.hero-inner { max-width: var(--maxw); margin: 0 auto; text-align: center; }
.hero h1 { font-size: clamp(2rem, 5vw, 3.2rem); margin: 0 0 1rem; letter-spacing: -0.02em; }
.hero h1 span { color: var(--blue); }
.lead { font-size: clamp(1.05rem, 2.2vw, 1.3rem); color: var(--muted); max-width: 720px; margin: 0 auto 1.8rem; }
.hero-cta { display: flex; gap: 0.9rem; justify-content: center; flex-wrap: wrap; margin-bottom: 1.2rem; }
.muted { color: var(--muted); font-size: 0.95rem; }

/* ---------- Sections ---------- */
.section { max-width: var(--maxw); margin: 0 auto; padding: 4rem 1.4rem; }
.section.alt { max-width: none; background: var(--bg-alt); }
.section.alt > * { max-width: var(--maxw); margin-left: auto; margin-right: auto; }
.section h2 { font-size: clamp(1.6rem, 3.5vw, 2.2rem); margin: 0 0 0.4rem; }
.section-lead { color: var(--muted); max-width: 680px; margin: 0 0 1.6rem; font-size: 1.05rem; }

/* ---------- Services grid ---------- */
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.1rem;
  margin-top: 1.6rem;
}
.card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.4rem;
  box-shadow: 0 2px 10px rgba(20,40,80,0.04);
}
.card h3 { margin: 0 0 0.5rem; font-size: 1.15rem; }
.card p { margin: 0; color: var(--muted); }

/* ---------- Lists ---------- */
.checks { list-style: none; padding: 0; margin: 1.2rem 0; }
.checks li { padding: 0.35rem 0; color: var(--ink); }

/* ---------- About ---------- */
.about {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 2.2rem;
  align-items: start;
}
.avatar {
  width: 100%;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: 0 6px 20px rgba(20,40,80,0.10);
}

/* ---------- Form ---------- */
.form { max-width: 620px; }
.form .row { display: flex; gap: 0.8rem; }
.form .row > * { flex: 1; }
.form input, .form textarea {
  width: 100%;
  padding: 0.8rem 0.9rem;
  margin-bottom: 0.8rem;
  border: 1px solid var(--border);
  border-radius: 10px;
  font: inherit;
  background: #fff;
}
.form input:focus, .form textarea:focus {
  outline: none;
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(21,101,192,0.15);
}
.hidden { display: none; }

/* ---------- Footer ---------- */
.footer {
  border-top: 1px solid var(--border);
  padding: 1.6rem 1.4rem;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.6rem;
  color: var(--muted);
  font-size: 0.92rem;
  max-width: var(--maxw);
  margin: 0 auto;
}
.footer a { color: var(--muted); }

/* ---------- Responsive ---------- */
@media (max-width: 640px) {
  .nav nav { gap: 0.8rem; font-size: 0.9rem; }
  .nav nav a:not(.btn) { display: none; }
  .about { grid-template-columns: 1fr; }
  .avatar { max-width: 180px; }
  .form .row { flex-direction: column; gap: 0; }
}