:root {
    --primary: #dc2626;
    --secondary: #b91c1c;
    --accent: #ef4444;
    --background: #ffffff;
    --text: #1f2937;
    --button: #f59e0b;
    --button-text: #ffffff;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--background);
    color: var(--text);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

header {
    background: var(--primary);
    color: white;
    padding: 1.5rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.75rem;
    font-weight: bold;
}

.phone {
    font-size: 1.25rem;
    font-weight: 600;
}

nav a {
    color: white;
    text-decoration: none;
    margin-left: 2rem;
}

.hero {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    padding: 6rem 0;
    text-align: center;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
}

.hero .subtitle {
    font-size: 1.5rem;
    margin-bottom: 2rem;
}

.btn {
    display: inline-block;
    padding: 1.25rem 2.5rem;
    background: var(--button);
    color: var(--button-text);
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1.125rem;
}

.what-we-install {
    padding: 5rem 0;
    background: white;
}

.what-we-install h2 {
    text-align: center;
    font-size: 2.75rem;
    color: var(--primary);
    margin-bottom: 4rem;
}

.install-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2.5rem;
}

.install-card {
    background: #f8f9fa;
    padding: 2.5rem;
    border-radius: 12px;
    text-align: center;
    transition: transform 0.3s;
}

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

.install-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
}

.install-card h3 {
    color: var(--primary);
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.guarantee {
    padding: 5rem 0;
    background: #f8f9fa;
}

.guarantee h2 {
    text-align: center;
    font-size: 2.75rem;
    color: var(--primary);
    margin-bottom: 4rem;
}

.guarantee-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.guarantee-item {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
}

.guarantee-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.guarantee-item h3 {
    color: var(--primary);
    margin-bottom: 0.5rem;
}

.form-section {
    background: var(--secondary);
    padding: 5rem 0;
    color: white;
}

.form-section h2 {
    text-align: center;
    font-size: 2.75rem;
    margin-bottom: 3rem;
}

form {
    max-width: 600px;
    margin: 0 auto;
}

form input,
form textarea {
    width: 100%;
    padding: 1.125rem;
    margin-bottom: 1rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
}

form button {
    width: 100%;
    padding: 1.25rem;
    background: var(--button);
    color: var(--button-text);
    border: none;
    border-radius: 8px;
    font-size: 1.125rem;
    font-weight: 600;
    cursor: pointer;
}

footer {
    background: #1f2937;
    color: white;
    text-align: center;
    padding: 3rem 0;
}