:root {
    --primary: #1a3a5a;
    --accent: #007bff;
    --light-bg: #f5f7fa;
    --white: #ffffff;
    --text: #333333;
}

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

body {
    font-family: "Segoe UI", sans-serif;
    color: var(--text);
    line-height: 1.6;
    background: var(--white);
}

/* HEADER */

.header {
    position: sticky;
    top: 0;
    z-index: 1000;

    display: flex;
    justify-content: space-between;
    align-items: center;

    padding: 15px 5%;

    background: white;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.logo-container {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.logo-icon {
    width: 40px;
    margin-right: 10px;
}

.logo-text {
    font-size: 22px;
    font-weight: 700;
    color: var(--primary);
}

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

.nav a {
    margin-left: 20px;
    text-decoration: none;
    color: var(--primary);
    font-weight: 500;
}

/* HERO */

.hero {
    position: relative;

    height: 80vh;

    display: flex;
    justify-content: center;
    align-items: center;

    text-align: center;

    background-image: url('https://images.unsplash.com/photo-1556761175-5973dc0f32e7?q=80&w=1600&auto=format&fit=crop');
    background-size: cover;
    background-position: center;
}

.hero-overlay {
    position: absolute;
    inset: 0;

    background: rgba(0,0,0,0.6);
}

.hero-content {
    position: relative;
    z-index: 2;

    color: white;
    max-width: 700px;
    padding: 20px;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 30px;
}

/* BUTTON */

.btn {
    display: inline-block;

    padding: 14px 32px;

    border: none;
    border-radius: 6px;

    background: var(--accent);
    color: white;

    text-decoration: none;
    font-weight: bold;
    cursor: pointer;

    transition: 0.3s;
}

.btn:hover {
    background: #005dc1;
}

/* SERVICES */

.services {
    padding: 80px 5%;
    background: var(--light-bg);
}

.services h2 {
    text-align: center;
    margin-bottom: 50px;
    color: var(--primary);
    font-size: 2.5rem;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.service-card {
    background: white;
    border-radius: 10px;
    overflow: hidden;

    box-shadow: 0 4px 15px rgba(0,0,0,0.06);

    transition: 0.3s;
}

.service-card:hover {
    transform: translateY(-5px);
}

.service-img {
    width: 100%;
    height: 220px;
    object-fit: cover;
}

.service-content {
    padding: 25px;
}

.service-content h3 {
    margin-bottom: 10px;
    color: var(--primary);
}

.service-price {
    color: var(--accent);
    font-weight: bold;
    margin-top: 15px;
}

/* CALCULATOR */

.calculator-section {
    padding: 80px 5%;
    text-align: center;
}

.calculator-section h2 {
    margin-bottom: 40px;
    color: var(--primary);
}

.calculator-box {
    max-width: 500px;
    margin: 0 auto;

    background: white;

    padding: 30px;

    border-radius: 10px;

    box-shadow: 0 5px 20px rgba(0,0,0,0.06);
}

.calculator-box input,
.calculator-box select {
    width: 100%;

    padding: 12px;
    margin-top: 10px;
    margin-bottom: 20px;

    border: 1px solid #ddd;
    border-radius: 6px;
}

.calc-btn {
    width: 100%;
}

.calc-result {
    margin-top: 25px;

    font-size: 1.5rem;
    font-weight: bold;

    color: var(--accent);
}

.calculator-note {
    margin-top: 10px;
    color: #777;
    font-size: 0.9rem;
}

/* FEATURES */

.features {
    padding: 80px 5%;

    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;

    background: var(--light-bg);
}

.feature-card {
    background: white;

    padding: 30px;

    border-radius: 10px;

    text-align: center;

    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
}

/* CONTACT */

.contact {
    padding: 80px 5%;

    text-align: center;

    background: var(--primary);
    color: white;
}

.contact h2 {
    margin-bottom: 20px;
    font-size: 2.5rem;
}

.phone-link {
    display: inline-block;

    margin-top: 30px;

    padding: 15px 30px;

    border-radius: 10px;

    background: rgba(255,255,255,0.15);

    color: white;

    text-decoration: none;
    font-size: 1.5rem;
    font-weight: bold;
}

/* FOOTER */

.footer {
    padding: 25px;

    text-align: center;

    background: #111;
    color: #aaa;
}

/* MOBILE */

@media (max-width: 768px) {

    .nav {
        display: none;
    }

    .hero h1 {
        font-size: 2.3rem;
    }

    .hero {
        height: 70vh;
    }

    .contact h2 {
        font-size: 2rem;
    }

}