/* Reset CSS cơ bản */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: #0b0f19;
    color: #e2e8f0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

/* Thẻ chứa chính (Card) */
.card {
    background: #151c2e;
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 20px;
    padding: 40px;
    width: 100%;
    max-width: 580px;
    box-shadow: 0 20px 40px -15px rgba(0, 0, 0, 0.7);
    text-align: center;
}

/* Tiêu đề chính */
.card h1 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: #ffffff;
    letter-spacing: -0.5px;
}

.subtitle {
    font-size: 0.95rem;
    color: #94a3b8;
    margin-bottom: 32px;
}

/* Khối hiển thị nổi bật IP */
.ip-highlight {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.15), rgba(147, 51, 234, 0.15));
    border: 1px solid rgba(99, 102, 241, 0.3);
    border-radius: 16px;
    padding: 24px;
    margin-bottom: 24px;
}

.ip-label {
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: #818cf8;
    margin-bottom: 8px;
}

.ip-address {
    font-size: 2.2rem;
    font-weight: 800;
    color: #38bdf8;
    word-break: break-all;
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

/* Danh sách thông tin chi tiết */
.info-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
    text-align: left;
}

.info-item {
    background: #1c2438;
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.info-title {
    font-size: 0.8rem;
    color: #94a3b8;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.info-value {
    font-size: 1rem;
    color: #f1f5f9;
    font-weight: 500;
}

.user-agent-text {
    font-size: 0.82rem;
    color: #64748b;
    margin-top: 4px;
    word-break: break-all;
    line-height: 1.4;
    font-family: monospace;
}

/* Footer nhỏ */
.footer {
    margin-top: 28px;
    font-size: 0.8rem;
    color: #475569;
}