.page {
    max-width: 860px;
    margin: 40px auto;
    padding: 0 16px;
}

.card {
    background: #fff;
    border: 1px solid #dde3ea;
    border-radius: 12px;
    padding: 28px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
}

h1 {
    margin: 0 0 10px;
    font-size: 28px;
}

h2,
h3 {
    margin: 0 0 8px;
}

p {
    margin: 0 0 18px;
    line-height: 1.6;
}

a {
    color: #1769aa;
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

.feed-header {
    padding-bottom: 18px;
    border-bottom: 1px solid #e7edf3;
    margin-bottom: 20px;
}

.feed-list {
    display: grid;
    gap: 16px;
}

.feed-item {
    padding: 18px;
    border: 1px solid #e7edf3;
    border-radius: 10px;
    background: #fbfdff;
}

.feed-item p:last-child {
    margin-bottom: 0;
}

.date {
    font-size: 14px;
    color: #65758b;
    margin-bottom: 10px;
}

.message {
    padding: 14px 16px;
    border-radius: 8px;
    background: #eef6ff;
    border: 1px solid #c8e1ff;
}

.error {
    background: #fff1f1;
    border-color: #ffc9c9;
    color: #9f1d1d;
}