:root {
  --color-primary: #1d4ed8;
  --color-primary-dark: #1e3a8a;
  --color-text: #1f2937;
  --color-muted: #6b7280;
  --color-bg: #ffffff;
  --color-bg-alt: #f3f4f6;
  --color-border: #e5e7eb;
  --max-width: 1100px;
  font-size: 16px;
}

* {
  box-sizing: border-box;
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

img {
  max-width: 100%;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header / Nav */
.site-header {
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  background: var(--color-bg);
  z-index: 10;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 1rem;
  padding-bottom: 1rem;
}

.brand {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text);
}

.brand:hover {
  text-decoration: none;
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 0.4rem 0.6rem;
  font-size: 1.1rem;
  cursor: pointer;
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 1.75rem;
  margin: 0;
  padding: 0;
}

.nav-links a {
  color: var(--color-text);
  font-weight: 500;
}

.nav-links a.active {
  color: var(--color-primary);
}

/* Hero */
.hero {
  background: linear-gradient(180deg, var(--color-bg-alt), var(--color-bg));
  padding: 4rem 0;
  text-align: center;
}

.hero h1 {
  font-size: 2.5rem;
  margin-bottom: 0.75rem;
}

.hero p {
  font-size: 1.15rem;
  color: var(--color-muted);
  max-width: 640px;
  margin: 0 auto 2rem;
}

.btn {
  display: inline-block;
  background: var(--color-primary);
  color: #fff;
  padding: 0.75rem 1.75rem;
  border-radius: 6px;
  font-weight: 600;
}

.btn:hover {
  background: var(--color-primary-dark);
  text-decoration: none;
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--color-primary);
  color: var(--color-primary);
}

/* Sections */
.section {
  padding: 3.5rem 0;
}

.section-alt {
  background: var(--color-bg-alt);
}

.section h2 {
  font-size: 1.9rem;
  margin-bottom: 0.5rem;
  text-align: center;
}

.section-intro {
  text-align: center;
  color: var(--color-muted);
  max-width: 640px;
  margin: 0 auto 2.5rem;
}

/* Service cards */
.cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.card {
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: 1.75rem;
  background: var(--color-bg);
}

.card h3 {
  margin-top: 0;
  font-size: 1.15rem;
  color: var(--color-primary-dark);
}

.card p {
  color: var(--color-muted);
  margin-bottom: 0;
}

/* Services page detail blocks */
.service-block {
  padding: 2rem 0;
  border-bottom: 1px solid var(--color-border);
}

.service-block:last-child {
  border-bottom: none;
}

.service-block h2 {
  text-align: left;
  font-size: 1.5rem;
  color: var(--color-primary-dark);
}

/* About */
.placeholder-note {
  background: #fffbeb;
  border: 1px dashed #f59e0b;
  border-radius: 8px;
  padding: 1rem 1.25rem;
  color: #92400e;
  font-size: 0.95rem;
}

/* Contact */
.contact-box {
  text-align: center;
  max-width: 480px;
  margin: 0 auto;
}

.contact-box .btn {
  margin-top: 1rem;
}

.contact-email {
  margin-top: 1rem;
  color: var(--color-muted);
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 2rem 0;
  text-align: center;
  color: var(--color-muted);
  font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 768px) {
  .cards {
    grid-template-columns: 1fr;
  }

  .nav-toggle {
    display: inline-block;
  }

  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    gap: 0;
    display: none;
    padding: 0.5rem 1.5rem 1rem;
  }

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

  .nav-links li {
    padding: 0.6rem 0;
    border-top: 1px solid var(--color-border);
  }

  .hero h1 {
    font-size: 2rem;
  }
}