* {
  box-sizing: border-box;
}
html,
body {
  overflow-x: hidden;
}
:root {
  --dark-bg: #0b132b;
  --semi-dark: #1c2541;
  --text-dark: #3a506b;
  --accent: #5bc0be;
  --light: #f0f0f0;
  --radius: 14px;
}

body {
  font-family: "Inter", sans-serif;
  background-color: var(--dark-bg);
  color: var(--light);
  scroll-behavior: smooth;
}

h1,
h2,
h3,
h4,
h5 {
  font-family: "DM Serif Display", serif;
  color: var(--accent);
}

a {
  color: var(--accent);
  text-decoration: none;
}
a:hover {
  text-decoration: underline;
}
.custom-navbar {
  background: linear-gradient(90deg, #0b132b 0%, #1c2541 50%, #0b132b 100%);
  transition: background 0.3s ease;
}

.custom-navbar .navbar-brand {
  color: #5bc0be;
  font-size: 1.2rem;
  letter-spacing: 0.5px;
}

.custom-navbar .nav-link {
  color: #f0f0f0;
  margin-left: 1rem;
  transition: all 0.2s ease;
  position: relative;
}

.custom-navbar .nav-link::after {
  content: "";
  display: block;
  width: 0%;
  height: 2px;
  background: #5bc0be;
  transition: width 0.3s;
  position: absolute;
  bottom: -4px;
  left: 0;
}

.custom-navbar .nav-link:hover::after {
  width: 100%;
}

.custom-navbar .nav-link:hover {
  color: #5bc0be;
}
.hero {
  background: linear-gradient(to right, #1c2541, #0b132b);
  padding: 100px 0;
  text-align: center;
}
.hero h1 {
  font-size: 3rem;
}
.hero p {
  font-size: 1.25rem;
  max-width: 600px;
  margin: 20px auto;
}
.section {
  padding: 80px 0;
}
.section-dark {
  background-color: var(--semi-dark);
}
.section-light {
  background-color: var(--light);
  color: var(--text-dark);
}
.section-accent {
  background-color: var(--accent);
  color: #fff;
}
.card-custom {
  background: #111;
  border-radius: var(--radius);
  padding: 30px;
  border: 1px solid rgba(255, 255, 255, 0.05);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.card-custom:hover {
  transform: translateY(-6px);
  box-shadow: 0 8px 16px rgba(91, 192, 190, 0.3);
}
.icon-box {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 20px;
}

.form-control,
textarea {
  background-color: #1c2541;
  border: 1px solid var(--accent);
  color: #fff;
  border-radius: var(--radius);
}
.form-control::placeholder,
textarea::placeholder {
  color: #aaa;
}
.form-control:focus {
  border-color: var(--accent);
  box-shadow: none;
}

.btn-accent {
  background-color: var(--accent);
  color: #fff;
  border-radius: var(--radius);
  padding: 10px 20px;
  transition: all 0.3s ease;
  font-weight: 600;
}
.btn-accent:hover {
  background-color: #449c9b;
  color: #fff;
}
footer {
  background-color: #0b132b;
  padding: 40px 0;
  color: #ccc;
  text-align: center;
}
footer a {
  color: var(--accent);
  margin: 0 8px;
  transition: color 0.3s;
}
footer a:hover {
  color: #fff;
}
[data-aos] {
  transition-property: opacity, transform;
}