:root {
    --primary: #1f2e4a;
    --secondary: #3f5f8c;
    --light: #c5ccd3;
}

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

body {
    background: #f5f7fa;
    color: var(--primary);
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: auto;
}

/* HEADER */
header {
    width: 100%;
    position: fixed;
    top: 0;
    background: transparent;
    transition: 0.3s;
    z-index: 1000;
}

header.sticky {
    background: var(--primary);
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    color: white;
}

.logo-box {
    background: var(--secondary);
    width: 45px;
    height: 45px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 22px;
}

.logo-text h1 {
    font-size: 20px;
    letter-spacing: 2px;
}

.logo-text span {
    font-size: 12px;
    letter-spacing: 3px;
}

nav a {
    color: white;
    margin-left: 25px;
    text-decoration: none;
    font-weight: 500;
}

.btn-nav {
    background: var(--secondary);
    padding: 8px 15px;
    border-radius: 5px;
}

/* HERO */
.hero {
    height: 100vh;
    background: linear-gradient(rgba(31,46,74,0.8), rgba(31,46,74,0.8)),
                url('https://images.unsplash.com/photo-1504384308090-c894fdcc538d') center/cover;
    display: flex;
    align-items: center;
    text-align: center;
    color: white;
}

.hero h2 {
    font-size: 42px;
    margin-bottom: 20px;
}

.hero p {
    max-width: 700px;
    margin: auto;
    margin-bottom: 30px;
}

.btn-primary {
    background: var(--secondary);
    padding: 12px 30px;
    border-radius: 5px;
    text-decoration: none;
    color: white;
    font-weight: bold;
}

/* SECTIONS */
section {
    padding: 100px 0;
}

.section-light {
    background: white;
}

.section-dark {
    background: var(--primary);
    color: white;
}

h3 {
    margin-bottom: 30px;
    font-size: 28px;
    text-align: center;
}

/* STATS */
.stats {
    display: flex;
    justify-content: space-around;
    margin-top: 40px;
    flex-wrap: wrap;
}

.stat h4 {
    font-size: 32px;
    color: var(--secondary);
}

/* GRID */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
}

.card {
    background: white;
    color: var(--primary);
    padding: 30px;
    border-radius: 10px;
    transition: 0.3s;
}

.section-dark .card {
    background: var(--light);
}

.card:hover {
    transform: translateY(-10px);
}

/* FORM */
.contact-form {
    max-width: 600px;
    margin: auto;
    display: flex;
    flex-direction: column;
}

.contact-form input,
.contact-form textarea {
    padding: 12px;
    margin-bottom: 15px;
    border: 1px solid var(--secondary);
    border-radius: 5px;
}

.contact-form button {
    background: var(--primary);
    color: white;
    padding: 12px;
    border: none