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

body {
    font-family: 'Charter', 'Bitstream Charter', Georgia, serif;
    line-height: 1.65;
    transition: background-color 0.3s, color 0.3s;
}

@media (prefers-color-scheme: light) {
    body {
        background-color: white;
        color: black;
    }
}

@media (prefers-color-scheme: dark) {
    body {
        background-color: black;
        color: white;
    }
}

header {
    padding: 35px 35px 25px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 680px;
    margin: 0 auto;
}

.header-name {
    font-size: 18px;
    font-weight: 400;
    letter-spacing: 0.02em;
}

.contact-btn {
    padding: 8px 16px;
    background: transparent;
    border: 1px solid currentColor;
    color: inherit;
    font-family: inherit;
    font-size: 16px;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.2s;
}


@media (prefers-color-scheme: light) {
    .contact-btn:hover {
        background: black;
        color: white;
    }
}

@media (prefers-color-scheme: dark) {
    .contact-btn:hover {
        background: white;
        color: black;
    }
}

.container {
    max-width: 680px;
    margin: 0 auto;
    padding: 30px 35px 80px;
}

article {
    margin-bottom: 72px;
}

article:last-child {
    margin-bottom: 0;
}

h1 {
    font-size: 30px;
    font-weight: 400;
    letter-spacing: -0.015em;
}

p {
    font-size: 18px;
    margin-bottom: 26px;
}

.loading {
    text-align: center;
    padding: 100px 20px;
    font-size: 18px;
}

.error {
    text-align: center;
    padding: 100px 20px;
    font-size: 18px;
}

@media (max-width: 768px) {
    header {
        padding: 25px 25px 20px;
    }

    .header-name {
        font-size: 16px;
    }

    .contact-btn {
        padding: 6px 12px;
        font-size: 13px;
    }

    .container {
        padding: 25px 25px 60px;
    }

    h1 {
        font-size: 24px;
    }

    p {
        font-size: 17px;
        margin-bottom: 24px;
    }
}