/* Reset & Base */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --bg: #f8fafc;
  --text: #1e293b;
  --muted: #64748b;
  --white: #ffffff;
  --radius: 10px;
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
}

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
}

/* Header & Nav */
header {
  background: var(--white);
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 100;
}

nav {
  max-width: 960px;
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-weight: 700;
  font-size: 1.4rem;
  color: var(--primary);
}

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

nav a {
  text-decoration: none;
  color: var(--text);
  font-weight: 500;
  transition: color 0.2s;
}

nav a:hover {
  color: var(--primary);
}

/* Main Sections */
main {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

section {
  padding: 4rem 0;
}

/* Hero */
.hero {
  text-align: center;
  padding: 6rem 0 4rem;
}

.hero h1 {
  font-size: 2.8rem;
  margin-bottom: 1rem;
  line-height: 1.2;
}

.hero p {
  font-size: 1.2rem;
  color: var(--muted);
  margin-bottom: 2rem;
}

.btn {
  display: inline-block;
  background: var(--primary);
  color: var(--white);
  padding: 0.85rem 2rem;
  border-radius: var(--radius);
  text-decoration: none;
  font-weight: 600;
  transition: background 0.2s, transform 0.1s;
}

.btn:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
}

/* About */
.about {
  background: var(--white);
  border-radius: var(--radius);
  padding: 3rem;
  box-shadow: var(--shadow);
}

.about h2 {
  margin-bottom: 1rem;
  font-size: 1.8rem;
}

/* Contact & Form */
.contact h2 {
  font-size: 1.8rem;
  margin-bottom: 0.5rem;
}

.contact > p {
  color: var(--muted);
  margin-bottom: 2rem;
}

form {
  background: var(--white);
  padding: 2rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

label {
  display: flex;
  flex-direction: column;
  font-weight: 500;
  font-size: 0.95rem;
  gap: 0.4rem;
}

input,
textarea {
  padding: 0.75rem 1rem;
  border: 1px solid #cbd5e1;
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 1rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}

input:focus,
textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

button[type="submit"] {
  background: var(--primary);
  color: var(--white);
  border: none;
  padding: 0.9rem;
  border-radius: var(--radius);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s;
}

button[type="submit"]:hover {
  background: var(--primary-dark);
}

/* Footer */
footer {
  text-align: center;
  padding: 2rem;
  color: var(--muted);
  font-size: 0.9rem;
}

/* Responsive */
@media (max-width: 600px) {
  .hero h1 {
    font-size: 2rem;
  }

  nav ul {
    gap: 1rem;
    font-size: 0.9rem;
  }

  .about,
  form {
    padding: 1.5rem;
  }
}