:root {
  --bg-dark: #0b1329;
  --bg-card: #131e3d;
  --bg-card-hover: #192750;
  --primary-blue: #0084ff;
  --secondary-blue: #00b4d8;
  --accent-blue: #023e8a;
  --text-white: #ffffff;
  --text-gray: #94a3b8;
  --border-color: #1e293b;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

body {
  background-color: var(--bg-dark);
  color: var(--text-white);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Navigation */
header {
  position: sticky;
  top: 0;
  background: rgba(11, 19, 41, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-color);
  z-index: 1000;
}

.nav-container {
  max-width: 1200px;
  margin: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
}

.logo-img {
  height: 48px;
  width: auto;
  object-fit: contain;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 2rem;
  align-items: center;
}

.nav-links a {
  color: var(--text-gray);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--secondary-blue);
}

/* Buttons */
.btn {
  display: inline-block;
  background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
  color: #fff;
  padding: 0.75rem 1.75rem;
  border-radius: 8px;
  font-weight: 600;
  text-decoration: none;
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 14px rgba(0, 132, 255, 0.35);
  transition: transform 0.2s, box-shadow 0.2s;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 180, 216, 0.45);
}

/* Container */
.container {
  max-width: 1100px;
  margin: auto;
  padding: 4rem 1.5rem;
  flex: 1;
}

/* Hero Section */
.hero {
  text-align: center;
  padding: 6rem 1.5rem 4rem;
}

.hero h1 {
  font-size: 3rem;
  line-height: 1.2;
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, #fff 40%, var(--secondary-blue));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero .subtitle {
  font-size: 1.35rem;
  color: var(--secondary-blue);
  margin-bottom: 1.5rem;
  font-weight: 600;
}

.hero p {
  color: var(--text-gray);
  max-width: 720px;
  margin: 0 auto 2.5rem;
  font-size: 1.15rem;
}

/* Section Titles */
.section-title {
  text-align: center;
  font-size: 2.2rem;
  margin-bottom: 1rem;
}

.section-subtitle {
  text-align: center;
  color: var(--text-gray);
  max-width: 650px;
  margin: 0 auto 3rem;
  font-size: 1.1rem;
}

/* Cards Grid */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: 2rem;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  padding: 2.2rem;
  border-radius: 12px;
  transition: transform 0.3s, background-color 0.3s;
}

.card:hover {
  transform: translateY(-5px);
  background: var(--bg-card-hover);
}

.card h3 {
  color: var(--secondary-blue);
  margin-bottom: 0.75rem;
  font-size: 1.3rem;
}

.card p {
  color: var(--text-gray);
}

/* Forms */
.form-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 2.5rem;
  max-width: 650px;
  margin: 0 auto;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  font-size: 0.95rem;
  font-weight: 500;
  margin-bottom: 0.5rem;
  color: var(--text-white);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.85rem 1rem;
  background: #0b1329;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  color: #fff;
  font-size: 1rem;
  outline: none;
  transition: border-color 0.2s;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--primary-blue);
}

/* Contact Info Item */
.contact-info-box {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 2rem;
  margin-bottom: 1.5rem;
}

.contact-info-box h4 {
  color: var(--secondary-blue);
  margin-bottom: 0.4rem;
}

.contact-info-box p,
.contact-info-box a {
  color: var(--text-gray);
  text-decoration: none;
  font-size: 1.05rem;
}

.contact-info-box a:hover {
  color: #fff;
}

/* Footer */
footer {
  border-top: 1px solid var(--border-color);
  background: #080d1a;
  text-align: center;
  padding: 2rem 1.5rem;
  color: var(--text-gray);
  font-size: 0.95rem;
  margin-top: auto;
}

/* Responsive */
@media (max-width: 768px) {
  .nav-container {
    flex-direction: column;
    gap: 1rem;
  }
  .nav-links {
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
  }
  .hero h1 {
    font-size: 2.1rem;
  }
}