/* ===== Общие стили ===== */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: Arial, sans-serif;
    background: #f4f6f9;
    min-height: 100vh;
    display: flex;
    flex-direction: column; /* header сверху, footer снизу */
}

/* ===== Хедер ===== */
header {
    background: #222;
    color: #fff;
    padding: 20px 50px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    width: 100%;
    box-shadow: 0 2px 6px rgba(0,0,0,0.2);
    z-index: 1000;
}

header .logo {
    font-size: 22px;
    font-weight: bold;
}
header nav {
    padding: 10px 0;
    display: flex;
    gap: 20px;
}
header nav a {
    color: #4da6ff;
    text-decoration: none;
    margin-left: 20px;
    font-weight: 500;
}

header nav a:hover {
    text-decoration: underline;
}

/* ===== Основной контент ===== */
main {
    flex: 1; /* занимает оставшееся место */
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

/* Блоки */
div {
    background: #ffffff;
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 6px 20px rgba(0,0,0,0.1);
    max-width: 350px;
    width: 100%;
}

/* ===== Форма ===== */
form {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

/* Поля ввода */
input {
    padding: 10px;
    border-radius: 8px;
    border: 1px solid #ccc;
    font-size: 14px;
    outline: none;
    transition: 0.2s;
}

input:focus {
    border-color: #4285f4;
}

/* Кнопки */
button,
a {
    display: block;
    text-align: center;
    padding: 10px;
    border-radius: 8px;
    border: none;
    background: #2d7df6;
    color: white;
    text-decoration: none;
    cursor: pointer;
    font-size: 14px;
    transition: 0.2s;
}

button:hover,
a:hover {
    background: #1b5fcc;
}

/* Кнопка входа через Google */
.login-google {
    background: #ffffff;
    color: #444;
    border: 1px solid #ddd;
    font-weight: 600;
}

.login-google:hover {
    background: #f1f1f1;
}

/* ===== Футер ===== */
footer {
    background: #222;
    color: #fff;
    padding: 20px 0;
    text-align: center;
    font-size: 14px;
    width: 100%;
}

footer a {
    color: #4da6ff;
    text-decoration: none;
    margin: 0 10px;
}

footer a:hover {
    text-decoration: underline;
}

/* ===== Адаптив ===== */
@media (max-width: 600px) {
    header {
        flex-direction: column;
        padding: 15px;
    }

    header nav a {
        margin: 8px 0 0 0;
    }

    footer {
        font-size: 12px;
        padding: 15px 0;
    }

    footer a {
        display: block;
        margin: 5px 0;
    }

    div {
        padding: 20px;
    }
}
.vertical-line {
    width: 2px;
    height: 100%;   /* 100% высоты родителя */
    background-color: black;
}