/* Сброс и фон */
body, html {
    margin: 0;
    padding: 0;
    height: 100%;
    background: #2f3e4e;
    font-family: Arial, sans-serif;
    color: #dce4ef;
}

/* Сетка */
.wrapper {
    display: grid;
    height: 100vh;
    grid-template-rows: auto 1fr auto;
    grid-template-columns: 200px 1fr 200px;
    grid-template-areas:
        "header header header"
        "left main right"
        "footer footer footer";
}

/* Шапка (три зоны) */
.header {
    grid-area: header;
    background: #2f3b46;
    color: white;
    padding: 10px 20px;
    display: grid;
    grid-template-columns: 400px 1fr 400px;
    align-items: center;
    border-bottom: 3px solid #3f4a55;
    box-shadow: 0 4px 12px rgba(0,0,0,0.4);
}

.header-left {
    display: flex;
        padding-right: 60px;
        padding-left: 30px;
    align-items: center;
}

.header-center {
    text-align: center;
}

.header-center h2 {
    margin: 10px;
    font-size: 28px;
}

.header-center h3 {
    margin: 10px;
    font-size: 18px;
    opacity: 0.8;
}

.header-right {
    text-align: right;
    padding-right: 10px;
    font-size: 18px;
}

/* Логотип */
.logo-link {
    display: inline-block;
    transition: 0.25s ease;
}

.logo {
    height: 100px;
    width: auto;
    filter: drop-shadow(0 0 6px rgba(80,120,160,0.6));
    transition: 0.25s ease;
}

.logo-link:hover .logo {
    transform: scale(1.08);
    filter: drop-shadow(0 0 12px rgba(120,160,200,0.9));
}

/* Кнопки меню */
.menu {
    background: linear-gradient(180deg, #5f7fa0 0%, #4a6a82 100%);
    border: 2px solid #1f2f3a;
    border-radius: 20px;
    padding: 18px 20px;
    font-size: 1.4rem;
    font-weight: 700;
    color: #e9f3ff;
    cursor: pointer;
    width: 580px;
    margin: 25px auto;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: 0.3s;
}

.menu:hover {
    background: linear-gradient(180deg, #6f8fb3 0%, #557a94 100%);
    transform: translateY(-3px);
    box-shadow: 0 8px 18px rgba(0,0,0,0.5), inset 0 1px 4px rgba(255,255,255,0.4);
}

.menu:active {
    transform: translateY(1px);
    box-shadow: 0 3px 6px rgba(0,0,0,0.4), inset 0 2px 6px rgba(0,0,0,0.5);
}

/* Линия */
.title-line {
    width: 260px;
    height: 2px;
    background: #738291;
    margin: 25px auto;
    box-shadow: 0 2px 6px rgba(0,0,0,0.6);
}

/* Боковые панели */
.left-side, .right-side {
    background: #2f3b46;
    padding: 20px;
    border-radius: 12px;
    border: 2px solid #3a4652;
    box-shadow: 0 8px 20px rgba(0,0,0,0.4);
    color: #dce4ef;
}

/* Подвал */
.footer {
    grid-area: footer;
    background-color: #2f3b46;
    color: white;
    padding: 30px;
    text-align: center;
}

/* Заголовки */
.main-title {
    font-size: 46px;
    font-weight: 800;
    color: #e9f3ff;
    text-align: center;
    margin: 40px 0 20px 0;
    text-shadow: 0 0 12px rgba(80,120,160,0.7);
    letter-spacing: 1px;
    position: relative;
}

.main-title::after {
    content: "";
    display: block;
    width: 460px;
    height: 3px;
    margin: 12px auto 0;
    background: linear-gradient(90deg, transparent, #6f8fb3, transparent);
    box-shadow: 0 0 10px rgba(80,120,160,0.7);
    border-radius: 2px;
}

.main-subtitle {
    font-size: 32px;
    font-weight: 800;
    color: #e9f3ff;
    text-align: center;
    margin: 0 0 65px 0;
    letter-spacing: 1px;
    text-shadow: 0 0 8px rgba(80,120,160,0.5);
}

/* Копирайт */
.copyright {
    text-align: center;
    color: #9aa8b5;
    font-size: 14px;
    margin-top: 20px;
    opacity: 0.7;
}

/* Адаптивность */
@media (max-width: 768px) {
    .wrapper {
        grid-template-columns: 1fr;
        grid-template-areas:
            "header"
            "main"
            "footer";
    }
    .left-side, .right-side {
        display: none;
    }
    .menu {
        width: 90%;
    }
}