/* Skybridge Systems — Corporate Theme */

:root {
  --primary: #1a3a5c;
  --primary-light: #2a5a8c;
  --accent: #3498db;
  --text: #2c3e50;
  --text-light: #6c7a89;
  --bg: #ffffff;
  --bg-alt: #f4f6f8;
  --border: #dce1e6;
  --max-width: 1100px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--text);
  line-height: 1.6;
  background: var(--bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

a:hover {
  text-decoration: underline;
}

img {
  max-width: 100%;
  height: auto;
}

/* ——— Header / Nav ——— */

header {
  background: var(--primary);
  color: #fff;
  padding: 0 1.5rem;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 6px rgba(0,0,0,.15);
}

.nav-wrap {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: .02em;
  color: #fff;
  text-decoration: none;
}

.logo span {
  color: var(--accent);
}

nav a {
  color: rgba(255,255,255,.85);
  margin-left: 2rem;
  font-size: .95rem;
  font-weight: 500;
  transition: color .2s;
}

nav a:hover,
nav a.active {
  color: #fff;
  text-decoration: none;
}

/* ——— Hero ——— */

.hero {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  color: #fff;
  padding: 5rem 1.5rem;
  text-align: center;
}

.hero h1 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.hero p {
  font-size: 1.15rem;
  max-width: 640px;
  margin: 0 auto 2rem;
  opacity: .9;
}

.btn {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  padding: .75rem 2rem;
  border-radius: 4px;
  font-weight: 600;
  font-size: 1rem;
  transition: background .2s;
}

.btn:hover {
  background: #2980b9;
  text-decoration: none;
}

/* ——— Sections ——— */

.section {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 4rem 1.5rem;
}

.section h2 {
  font-size: 1.75rem;
  margin-bottom: 1rem;
  color: var(--primary);
}

.section p {
  color: var(--text-light);
  max-width: 720px;
}

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

/* ——— Card Grid ——— */

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 2rem;
  transition: box-shadow .2s;
}

.card:hover {
  box-shadow: 0 4px 12px rgba(0,0,0,.08);
}

.card h3 {
  font-size: 1.15rem;
  margin-bottom: .5rem;
  color: var(--primary);
}

.card p {
  font-size: .95rem;
  color: var(--text-light);
}

/* ——— Contact Form ——— */

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  margin-top: 2rem;
}

.contact-info p {
  margin-bottom: .75rem;
}

.contact-info strong {
  color: var(--primary);
}

form label {
  display: block;
  margin-bottom: .25rem;
  font-weight: 500;
  font-size: .95rem;
}

form input,
form textarea {
  width: 100%;
  padding: .6rem .8rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  font-size: .95rem;
  font-family: inherit;
  margin-bottom: 1rem;
  background: var(--bg);
}

form input:focus,
form textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(52,152,219,.15);
}

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

form button {
  cursor: pointer;
  border: none;
  font-family: inherit;
}

/* ——— Footer ——— */

footer {
  background: var(--primary);
  color: rgba(255,255,255,.7);
  text-align: center;
  padding: 2rem 1.5rem;
  margin-top: auto;
  font-size: .9rem;
}

footer a {
  color: rgba(255,255,255,.85);
}

footer a:hover {
  color: #fff;
}

/* ——— Utilities ——— */

.text-center { text-align: center; }
.mt-2 { margin-top: 2rem; }

/* ——— Responsive ——— */

@media (max-width: 768px) {
  .nav-wrap {
    flex-direction: column;
    height: auto;
    padding: .75rem 0;
    gap: .5rem;
  }

  nav a {
    margin-left: 1rem;
    font-size: .85rem;
  }

  .hero {
    padding: 3rem 1.5rem;
  }

  .hero h1 {
    font-size: 1.75rem;
  }

  .contact-grid {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 2.5rem 1rem;
  }
}