* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
    background: #0f172a;
    color: #e5e7eb;
}

.page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
}

.card {
    width: 100%;
    max-width: 640px;
    background: #111827;
    border-radius: 16px;
    padding: 24px 20px 20px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.4);
}

h1 {
    margin: 0 0 8px;
    font-size: 28px;
}

.subtitle {
    margin: 0 0 16px;
    color: #9ca3af;
}

.greeting {
    margin: 0 0 16px;
    font-weight: 500;
}

p {
    line-height: 1.5;
    margin: 0 0 12px;
}

h2,
h3 {
    margin-top: 20px;
    margin-bottom: 8px;
    font-size: 18px;
}

.tech-list {
    margin: 0 0 16px 20px;
    padding: 0;
}

.tech-list li {
    margin-bottom: 4px;
}

.button {
    margin-top: 4px;
    padding: 8px 14px;
    border-radius: 999px;
    border: none;
    background: #2563eb;
    color: #ffffff;
    font-size: 14px;
    cursor: pointer;
}

.button:hover {
    background: #1d4ed8;
}

.ping-row {
    display: flex;
    align-items: center;
    gap: 8px;
}

.ping-result {
    margin: 0;
    font-size: 14px;
    color: #a5b4fc;
}


.status {
    margin-top: 16px;
    padding: 12px 14px;
    border-radius: 8px;
    background: #020617;
    border: 1px solid #1f2937;
    font-size: 14px;
}

.footer {
    margin-top: 20px;
    font-size: 12px;
    color: #9ca3af;
    text-align: right;
}

@media (max-width: 480px) {
    .card {
        padding: 18px 16px 16px;
    }

    h1 {
        font-size: 24px;
    }
}