:root {
    --clr-primary: #013a63;
    --clr-secondary: #0077b6;
    --clr-accent: #90e0ef;
    --clr-light: #f0f9ff;
    --clr-dark: #001219;
    --clr-primary-hero: rgba(1, 58, 99, 0.9);
    --clr-secondary-hero: rgba(0, 119, 182, 0.8);
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: 'Inter', sans-serif;
    color: var(--clr-dark);
    line-height: 1.6;
    background: var(--clr-light);
}

/* Header */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    z-index: 1000;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 0;
}

.logo {
    font-size: 0;
    line-height: 0;
    color: var(--clr-primary);
    text-decoration: none;
}

nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    gap: 1.5rem;
}

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

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

/* Hero */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background-image:
            linear-gradient(135deg, var(--clr-primary-hero) 0%, var(--clr-secondary-hero) 100%),
            url("img/bg.jpg");
    background-position: center;
    background-size: cover;
    color: #fff;
    padding: 2rem;
}

.hero h1 {
    font-size: clamp(2.5rem, 6vw, 4rem);
    margin: 0 0 1rem;
}

.hero p {
    font-size: clamp(1.125rem, 2.5vw, 1.5rem);
    margin-bottom: 2rem;
    max-width: 48rem;
    margin-inline: auto;
}

.btn-primary {
    background: var(--clr-accent);
    color: var(--clr-dark);
    padding: 0.75rem 2rem;
    border: none;
    border-radius: 2rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s ease, background 0.2s ease;
}

.btn-primary:hover {
    transform: translateY(-2px);
    background: #caf0f8;
}

/* Sections */
section {
    padding: 6rem 0;
    background: #fff;
}

section:nth-of-type(even) {
    background: var(--clr-light);
}

.section-title {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 3rem;
    color: var(--clr-primary);
}

.grid {
    display: grid;
    gap: 2rem;
}

@media (min-width: 768px) {
    .grid-cols-2 {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Services */
.service {
    background: #fff;
    border-radius: 1rem;
    padding: 2rem;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.05);
    transition: transform 0.2s ease;
}

.service:hover {
    transform: translateY(-4px);
}

.service h3 {
    margin-top: 0;
    color: var(--clr-secondary);
}

/* About */
.about-content {
    max-width: 50rem;
    margin: 0 auto;
    text-align: center;
    font-size: 1.125rem;
}

/* Contact */
.contact-info {
    text-align: center;
    font-size: 1.125rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    color: var(--clr-dark);
}

footer {
    background: var(--clr-dark);
    color: #fff;
    text-align: center;
    padding: 2rem 1rem;
}

/* Hide nav when screen width is less than 528px */
@media (max-width: 527px) {
    nav {
        display: none;
    }
    .nav {
        justify-content: center;
    }
}