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

:root {
  --color-bg: #f8fafc;
  --color-surface: #ffffff;
  --color-primary: #2563eb;
  --color-primary-hover: #1d4ed8;
  --color-text: #1e293b;
  --color-muted: #64748b;
  --color-border: #e2e8f0;
  --font: system-ui, -apple-system, sans-serif;
}

body {
  font-family: var(--font);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
}

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

/* Navigation */
nav {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 1rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

nav .logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary);
}

nav ul {
  list-style: none;
  display: flex;
  gap: 1.5rem;
}

nav ul a {
  color: var(--color-muted);
  font-size: 0.9rem;
  font-weight: 500;
  transition: color 0.2s;
}

nav ul a:hover,
nav ul a.active { color: var(--color-primary); }

/* Layout */
.container { max-width: 800px; margin: 0 auto; padding: 3rem 2rem; }

/* Hero */
.hero {
  text-align: center;
  padding: 4rem 2rem;
}

.hero h1 {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 1rem;
}

.hero p {
  color: var(--color-muted);
  font-size: 1.1rem;
  max-width: 500px;
  margin: 0 auto 2rem;
}

.btn {
  display: inline-block;
  background: var(--color-primary);
  color: #fff;
  padding: 0.75rem 1.5rem;
  border-radius: 0.5rem;
  font-weight: 600;
  font-size: 0.9rem;
  transition: background 0.2s;
}

.btn:hover { background: var(--color-primary-hover); color: #fff; }

/* Cards */
.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 0.75rem;
  padding: 1.5rem;
}

.card h3 { margin-bottom: 0.5rem; }
.card p { color: var(--color-muted); font-size: 0.9rem; }

/* Page headings */
h1 { font-size: 2rem; font-weight: 700; margin-bottom: 1rem; }
h2 { font-size: 1.25rem; font-weight: 600; margin-bottom: 0.5rem; }

p + p { margin-top: 1rem; }

/* Contact form */
form.contact {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-width: 480px;
  margin-top: 1.5rem;
}

form.contact label {
  font-weight: 500;
  font-size: 0.9rem;
}

form.contact input,
form.contact textarea {
  width: 100%;
  padding: 0.6rem 0.75rem;
  border: 1px solid var(--color-border);
  border-radius: 0.5rem;
  font-family: var(--font);
  font-size: 0.9rem;
}

form.contact textarea { resize: vertical; min-height: 120px; }

/* Footer */
footer {
  text-align: center;
  padding: 2rem;
  color: var(--color-muted);
  font-size: 0.8rem;
  border-top: 1px solid var(--color-border);
  margin-top: 4rem;
}