:root {
    --bg: #f8f9fa;
    --text: #1a1a1a;
    --accent: #2563eb;
    --card: #ffffff;
}

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

body {
    font-family: system-ui, -apple-system, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.5;
}

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

/* Первый экран */
header {
    padding: 20px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

nav ul {
    display: flex;
    gap: 24px;
    list-style: none;
}

nav a {
    text-decoration: none;
    color: var(--text);
    font-weight: 500;
}

.hero {
    padding: 60px 0;
    text-align: center;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 16px;
    line-height: 1.1;
}

.hero p {
    font-size: 1.25rem;
    color: #555;
    margin-bottom: 32px;
}

.btn {
    display: inline-block;
    background: var(--accent);
    color: white;
    padding: 14px 32px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: 0.3s;
}

.btn:hover {
    background: #1d4ed8;
}

/* Секции */
section {
    padding: 80px 0;
}

h2 {
    font-size: 2rem;
    margin-bottom: 40px;
    text-align: center;
}

h3 {
    margin-top:12px;
}
/* Сетка услуг */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.service-card {
    background: var(--card);
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.04);
}

.service-card h3 {
    margin-bottom: 12px;
}

/* Портфолио */
.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}

.project-img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    border-radius: 12px;
}

/* Калькулятор (простой прототип) */
.calculator {
    background: var(--card);
    padding: 40px;
    border-radius: 16px;
    max-width: 600px;
    margin: 0 auto;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.06);
}

.calc-row {
    display: flex;
    gap: 16px;
    margin-bottom: 16px;
}

.calc-row label {
    flex: 1;
}

.calc-row input {
    flex: 1;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 8px;
}

#type {
    padding: 10px;
    font-size: 14px;
}

#result {
    margin-top: 20px;
    font-size: 1.2rem;
    font-weight: bold;
    color: var(--accent);
}

footer {
    padding: 40px 0;
    text-align: center;
    color: #777;
    border-top: 1px solid #e5e7eb;
}

.call-button {
    position: fixed;
    right: 20px;
    bottom: 20px;
    z-index: 9999;
}

.btn-call {
    background: var(--accent);
    padding: 16px 24px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    gap: 10px;
}


.feedback-form {
    padding: 30px;
    background: var(--card);
    border-radius: 12px;
    max-width: 400px;
    margin: 40px auto;
}

.feedback-form input,
.feedback-form textarea {
    display: block;
    width: 100%;
    padding: 14px;
    margin-bottom: 16px;
    border: 1px solid #ddd;
    border-radius: 8px;
}


/* Адаптив */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2rem;
    }

    nav ul {
        display: none;
    }
}
    /* Тут можно добавить бургер-меню отдельно */