* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Arial, sans-serif;
    color: #2f3e46;
    background: #eef7fb;
}

.page {
    max-width: 960px;
    min-height: 100vh;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    background: #fff;
}

header {
    padding: 32px 20px 24px;
    text-align: center;
    border-bottom: 1px solid #d7e8ef;
}

header h1 {
    margin: 0 0 8px;
    font-size: 28px;
    color: #168aad;
}

header p {
    margin: 0;
    color: #52796f;
}

main {
    flex: 1;
    padding: 40px 20px 60px;
}

.content {
    max-width: 620px;
    margin: 0 auto;
}

h2 {
    margin: 0 0 8px;
    font-size: 24px;
    color: #168aad;
}

.intro {
    margin: 0 0 24px;
    line-height: 1.5;
}

.form {
    padding: 28px;
    border: 1px solid #b7d8e8;
    border-radius: 8px;
    background: #f8fdff;
}

.form-row {
    display: grid;
    grid-template-columns: 180px minmax(0, 1fr);
    gap: 12px;
    align-items: center;
    margin-bottom: 16px;
}

.form-row label {
    font-weight: bold;
}

.form-row input {
    width: 100%;
    min-width: 0;
    padding: 9px 10px;
    font: inherit;
    border: 1px solid #90b9ca;
    border-radius: 5px;
    background: #fff;
}

.form-row input:focus {
    outline: 2px solid #168aad;
    outline-offset: 1px;
}

.form-row small {
    grid-column: 2;
    color: #52656d;
}

.form-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-left: 192px;
}

.button {
    padding: 10px 18px;
    font: inherit;
    font-weight: bold;
    color: #123b4c;
    background-color: #d4edf5;
    border: 1px solid #168aad;
    border-radius: 5px;
    cursor: pointer;
}

.button:hover {
    background-color: #b8deeb;
}

.button-reset {
    color: #2f3e46;
    background-color: #e8eef0;
    border-color: #6c7f87;
}

.button-reset:hover {
    background-color: #d7e1e4;
}

.form-footer {
    margin: 20px 0 0;
    text-align: center;
}

a {
    color: #168aad;
}

.message {
    margin: 0 0 20px;
    padding: 12px 16px;
    border-radius: 5px;
}

.message-error {
    color: #a32626;
    background: #fff1f1;
    border: 1px solid #e9b2b2;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    background: #f8fdff;
}

.data-table th,
.data-table td {
    padding: 12px;
    border: 1px solid #b7d8e8;
    overflow-wrap: anywhere;
}

.data-table td:first-child {
    width: 40%;
    font-weight: bold;
}

footer {
    padding: 20px;
    text-align: center;
    color: #52796f;
    background: #dff3f8;
}

footer p {
    margin: 4px 0;
}

@media (max-width: 600px) {
    header h1 {
        font-size: 24px;
    }

    main {
        padding-top: 30px;
    }

    .form {
        padding: 20px;
    }

    .form-row {
        display: block;
    }

    .form-row label {
        display: block;
        margin-bottom: 6px;
    }

    .form-row small {
        display: block;
        margin-top: 6px;
    }

    .form-actions {
        margin-left: 0;
    }
}

/* Практические работы 10–11 */
.avatar { max-width: 160px; max-height: 160px; border-radius: 8px; display: block; }
.field-status { display: block; min-height: 1em; }
.field-status-ok { color: #1a7f37; }
.field-status-error { color: #b42318; }
.message-success { color: #1a7f37; }

/* Явные ошибки валидации */
.field-error { display: block; margin-top: 4px; color: #a32626; font-weight: 600; }
.input-invalid { border-color: #a32626 !important; background: #fff8f8; }
.message-error ul { margin: 8px 0 0 18px; padding: 0; }
.message-error a { color: #a32626; }

/* Работа 12: уведомления */
.message-success { background: #f0fff4; border: 1px solid #a6dcb5; }
.message-warning { color: #7a5200; background: #fff8e6; border: 1px solid #f0d58c; }