body {
    font-family: 'Segoe UI', sans-serif;
    background: linear-gradient(135deg, #e0f2fe, #f0fdf4);
    margin: 0;
    padding: 20px;
}

/* HEADER */
h2 {
    margin-bottom: 20px;
    color: #0f172a;
}

/* GRID */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 20px;
}

/* CARD */
.card {
    background: #ffffff;
    border-radius: 16px;
    padding: 18px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.08);
    transition: 0.3s;
    position: relative;
    overflow: hidden;
}

.card:hover {
    transform: translateY(-5px);
}

/* STATUS ICON */
.icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    margin-bottom: 10px;
}

.success {
    background: #dcfce7;
    color: #16a34a;
}

.error {
    background: #fee2e2;
    color: #dc2626;
}

/* TITLE */
.title {
    font-weight: 600;
    font-size: 16px;
    color: #0f172a;
}

/* RESPONSE TIME */
.response {
    font-size: 22px;
    font-weight: bold;
    margin-top: 5px;
    color: #0ea5e9;
}

/* MESSAGE */
.message {
    font-size: 13px;
    margin-top: 6px;
    color: #475569;
}

/* TIME */
.time {
    font-size: 12px;
    margin-top: 10px;
    color: #94a3b8;
}

/* STATUS BAR (LEFT) */
.card.success-border {
    border-left: 5px solid #22c55e;
}

.card.error-border {
    border-left: 5px solid #ef4444;
}

button {
    background: linear-gradient(135deg, #22c55e, #0ea5e9);
    border: none;
    padding: 10px 16px;
    color: white;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
}

button:hover {
    opacity: 0.9;
}