/* Базовые настройки и переменные */
:root {
    --primary-color: #e67e22; /* Янтарный цвет пива */
    --primary-hover: #d35400;
    --dark-bg: #1e272e;
    --light-bg: #f5f6fa;
    --text-color: #2f3640;
}

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

body {
    background-color: var(--light-bg);
    color: var(--text-color);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Шапка сайта */
header {
    background-color: var(--dark-bg);
    padding: 1.2rem 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.logo {
    color: var(--primary-color);
    font-size: 1.8rem;
    font-weight: bold;
    text-decoration: none;
    letter-spacing: 1px;
}

nav a {
    color: #fff;
    text-decoration: none;
    margin-left: 2rem;
    text-transform: uppercase;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.3s ease;
}

nav a:hover, nav a.active {
    color: var(--primary-color);
}

/* Главный экран (Hero) */
.hero {
    background: linear-gradient(rgba(30, 39, 46, 0.8), rgba(30, 39, 46, 0.8)), 
                url('https://images.unsplash.com/photo-1518176258769-f227c798150e?q=80&w=2000') center/cover;
    height: 60vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    color: #fff;
    padding: 0 20px;
}

.hero h1 {
    font-size: 3.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
}

.hero p {
    font-size: 1.2rem;
    max-width: 600px;
    margin-bottom: 2rem;
}

.btn {
    background-color: var(--primary-color);
    color: #fff;
    padding: 10px 25px;
    text-decoration: none;
    border-radius: 5px;
    font-weight: bold;
    transition: background 0.3s;
}

.btn:hover {
    background-color: var(--primary-hover);
}

/* Контейнер для контента */
.container {
    max-width: 1200px;
    margin: 3rem auto;
    padding: 0 20px;
    flex: 1;
}

/* Карточки контента */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.card {
    background: #fff;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    border-bottom: 4px solid var(--primary-color);
    transition: transform 0.3s ease;
}

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

.card h3 {
    color: var(--dark-bg);
    margin-bottom: 1rem;
    font-size: 1.4rem;
}

.tag {
    display: inline-block;
    background: var(--dark-bg);
    color: var(--primary-color);
    font-size: 0.8rem;
    padding: 3px 8px;
    border-radius: 3px;
    margin-bottom: 10px;
}

/* Подвал */
footer {
    background-color: var(--dark-bg);
    color: #7f8fa6;
    text-align: center;
    padding: 1.5rem;
    margin-top: auto;
}
/* Стили для форм калькулятора */
.form-group {
    margin-bottom: 1.2rem;
    text-align: left;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    font-size: 0.95rem;
}

.form-group input {
    width: 100%;
    padding: 10px;
    border: 1px solid #dcdde1;
    border-radius: 4px;
    font-size: 1rem;
    background-color: var(--light-bg);
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(230, 126, 34, 0.2);
}

.result-box {
    margin-top: 1.5rem;
    padding: 15px;
    background-color: var(--dark-bg);
    color: #fff;
    border-radius: 5px;
    text-align: center;
    font-size: 1.2rem;
    font-weight: bold;
}

.result-box span {
    color: var(--primary-color);
    font-size: 1.5rem;
}