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

body {
    background-color: #f4f7f6;
    color: #333;
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Шапка */
header {
    background-color: #0d253f;
    color: #fff;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
}

.logo span {
    color: #00b4d8;
}

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

nav ul li {
    margin-left: 1.5rem;
}

nav ul li a {
    color: #fff;
    text-decoration: none;
    transition: color 0.3s;
}

nav ul li a:hover, nav ul li a.active {
    color: #00b4d8;
}

/* Главный блок */
main {
    flex: 1;
}

.hero {
    background: linear-gradient(rgba(13, 37, 63, 0.8), rgba(13, 37, 63, 0.8)), url('https://images.unsplash.com/photo-1544197150-b99a580bb7a8?auto=format&fit=crop&w=1200&q=80') center/cover;
    color: #fff;
    text-align: center;
    padding: 5rem 1rem;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 1.5rem;
}

.btn {
    display: inline-block;
    background: #00b4d8;
    color: #fff;
    padding: 0.75rem 1.5rem;
    text-decoration: none;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background 0.3s;
}

.btn:hover {
    background: #0077b6;
}

/* Карточки */
.features {
    display: flex;
    justify-content: space-around;
    padding: 3rem 2rem;
    gap: 1rem;
    flex-wrap: wrap;
}

.card {
    background: #fff;
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    flex: 1;
    min-width: 250px;
    max-width: 350px;
}

.card h3 {
    margin-bottom: 0.5rem;
    color: #0d253f;
}

/* Основной контент страниц */
.content {
    max-width: 900px;
    margin: 2rem auto;
    padding: 0 1rem;
}

.content h1, .content h2, .content h3 {
    color: #0d253f;
    margin: 1.5rem 0 0.5rem 0;
}

.content ul {
    margin-left: 1.5rem;
    margin-bottom: 1rem;
}

/* Таблицы */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
    background: #fff;
}

table, th, td {
    border: 1px solid #ddd;
}

th, td {
    padding: 0.75rem;
    text-align: left;
}

th {
    background-color: #0d253f;
    color: white;
}

/* Формы */
.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-top: 1rem;
    background: #fff;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
}

.contact-form input, .contact-form textarea {
    padding: 0.5rem;
    border: 1px solid #ccc;
    border-radius: 4px;
}

/* Футер */
footer {
    background-color: #0d253f;
    color: #fff;
    text-align: center;
    padding: 1rem;
    margin-top: auto;
}