:root {
  --color-bg: #ffffff;
  --color-text: #1a1f2b;
  --color-muted: #5b6373;
  --color-primary: #1f4fd8;
  --color-primary-dark: #173da8;
  --color-alt: #f4f6fa;
  --radius: 10px;
}

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

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

.container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

.narrow { max-width: 640px; }

/* Header */
.site-header {
  border-bottom: 1px solid #e5e8ef;
  position: sticky;
  top: 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(6px);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 0.9rem;
  padding-bottom: 0.9rem;
}

.logo {
  font-weight: 700;
  font-size: 1.15rem;
  text-decoration: none;
  color: var(--color-text);
}

.logo span { color: var(--color-muted); font-weight: 500; }

.nav nav { display: flex; align-items: center; gap: 1.25rem; }
.nav nav a { color: var(--color-muted); text-decoration: none; }
.nav nav a:hover { color: var(--color-text); }

/* Buttons */
.btn {
  display: inline-block;
  background: var(--color-primary);
  color: #fff;
  padding: 0.7rem 1.4rem;
  border-radius: var(--radius);
  text-decoration: none;
  font-weight: 600;
  transition: background 0.15s ease;
}

.btn:hover { background: var(--color-primary-dark); }
.btn-small { padding: 0.45rem 1rem; color: #fff !important; }

/* Hero */
.hero {
  padding: 6rem 0 5rem;
  background: linear-gradient(180deg, var(--color-alt) 0%, var(--color-bg) 100%);
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 1rem;
}

.tagline {
  font-size: 1.15rem;
  color: var(--color-muted);
  margin-bottom: 2rem;
  max-width: 34rem;
}

/* Sections */
.section { padding: 4rem 0; }
.section-alt { background: var(--color-alt); }
.section h2 { font-size: 1.8rem; margin-bottom: 1.5rem; }

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.25rem;
}

.card {
  background: var(--color-bg);
  border: 1px solid #e5e8ef;
  border-radius: var(--radius);
  padding: 1.5rem;
}

.section-alt .card { background: #fff; }

.card h3 { margin-bottom: 0.5rem; }
.card p { color: var(--color-muted); }

/* Contact */
.contact-list { list-style: none; margin-top: 1rem; }
.contact-list li { padding: 0.4rem 0; }
.contact-list a { color: var(--color-primary); }

/* Footer */
.site-footer {
  border-top: 1px solid #e5e8ef;
  padding: 1.5rem 0;
  color: var(--color-muted);
  font-size: 0.9rem;
}