body {
    margin: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #0b1120;
    color: #f8fafc;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.dashboard {
    background: #1e293b;
    padding: 40px;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    width: 90%;
    max-width: 800px;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    border-bottom: 1px solid #334155;
    padding-bottom: 20px;
}

h1 {
    margin: 0;
    font-size: 2em;
}

h1 span {
    color: #10b981; /* Màu xanh lá cây mượt mà */
}

.status {
    display: flex;
    align-items: center;
    font-size: 0.9em;
    color: #94a3b8;
}

.dot {
    height: 10px;
    width: 10px;
    background-color: #10b981;
    border-radius: 50%;
    display: inline-block;
    margin-right: 8px;
}

.pulse {
    animation: pulse-animation 2s infinite;
}

@keyframes pulse-animation {
    0% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
    70% { box-shadow: 0 0 0 10px rgba(16, 185, 129, 0); }
    100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.card {
    background: #0f172a;
    padding: 20px;
    border-radius: 12px;
    text-align: center;
    border: 1px solid #334155;
}

.ai-card {
    border-color: #6366f1;
    box-shadow: 0 0 15px rgba(99, 102, 241, 0.2);
}

.card h3 {
    margin: 0 0 15px 0;
    font-size: 1.1em;
    color: #cbd5e1;
}

.value {
    font-size: 1.8em;
    font-weight: bold;
    margin: 0;
    color: #38bdf8;
}

.status-text {
    font-size: 1.2em;
    color: #a855f7;
}

.action-btn {
    width: 100%;
    background: #10b981;
    color: #0b1120;
    border: none;
    padding: 15px;
    font-size: 1.1em;
    font-weight: bold;
    border-radius: 10px;
    cursor: pointer;
    transition: background 0.3s;
}

.action-btn:hover {
    background: #059669;
    color: white;
}