/* CSS Variables */
:root {
    --bg-color: #0b1120;
    --card-bg: #1e293b;
    --metric-bg: #273449;
    --border-color: #334155;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --accent-main: #2dd4bf;
    --accent-main-text: #042f2e;
    --accent-db: #3b82f6;
    --accent-db-text: #eff6ff;
    --error-red: #ef4444;
    --warning-yellow: #f59e0b;
    --font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    font-family: var(--font-family);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 40px;
    border-bottom: 1px solid var(--border-color);
}

.logo { font-size: 1.25rem; font-weight: 600; }
.logo span { color: var(--text-main); }
.logo-muted { color: var(--text-muted); font-weight: 400; }

.status {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.status-dot {
    width: 8px;
    height: 8px;
    background-color: var(--error-red);
    border-radius: 50%;
    box-shadow: 0 0 8px var(--error-red);
}

.status-dot.online {
    background-color: var(--accent-main);
    box-shadow: 0 0 8px var(--accent-main);
}

.dashboard-container {
    flex: 1;
    padding: 40px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px;
    width: 100%;
}

.main-feeder-wrapper {
    width: 100%;
    max-width: 900px;
    position: relative;
}

.badge-main {
    position: absolute;
    top: -12px;
    left: 24px;
    background-color: var(--accent-main);
    color: var(--accent-main-text);
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.main-feeder-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    margin-top: 8px;
}

.feeder-id { color: var(--text-muted); font-size: 0.9rem; }

.metrics-horizontal {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 16px;
}

.connections {
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
    max-width: 900px;
}

.line-vertical {
    width: 2px;
    height: 30px;
    background-color: var(--border-color);
}

.line-horizontal-container { width: 80%; position: relative; }
.line-horizontal { width: 100%; height: 2px; background-color: var(--border-color); }

.db-drop-lines {
    display: flex;
    justify-content: space-between;
    width: 100%;
}

.db-drop-lines div {
    width: 2px;
    height: 30px;
    background-color: var(--border-color);
}

.db-container {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 16px;
    width: 100%;
    max-width: 1100px;
}

.db-card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    transition: border-color 0.3s;
}

/* Offline state styling for cards */
.db-card.offline {
    border-color: var(--error-red);
    opacity: 0.7;
}

.db-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.badge-db {
    background-color: var(--accent-db);
    color: var(--accent-db-text);
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 0.7rem;
    font-weight: 600;
}

/* Offline state styling for badges */
.badge-db.offline {
    background-color: var(--error-red);
    color: #fff;
}

.metric-box {
    background-color: var(--metric-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 12px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.metric-label {
    color: var(--text-muted);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.metric-value { font-size: 1.1rem; font-weight: 600; }

/* Responsive adjustments */
@media (max-width: 1024px) {
    .metrics-horizontal { grid-template-columns: repeat(3, 1fr); }
    .db-container { grid-template-columns: repeat(3, 1fr); }
    .connections { display: none; }
    .db-container { margin-top: 30px; }
}

@media (max-width: 768px) {
    .metrics-horizontal { grid-template-columns: 1fr 1fr; }
    .db-container { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 480px) {
    .metrics-horizontal { grid-template-columns: 1fr; }
    .db-container { grid-template-columns: 1fr; }
}

/* =========================================
   Update Notice & Footer 
   ========================================= */

.update-notice {
    width: 100%;
    max-width: 900px;
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-bottom: 16px;
    opacity: 0.8;
}

footer {
    text-align: center;
    padding: 24px;
    font-size: 0.9rem;
    color: var(--text-muted);
    border-top: 1px solid var(--border-color);
    margin-top: auto; 
}

footer a {
    color: var(--accent-main);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.2s ease, text-decoration 0.2s ease;
}

footer a:hover {
    color: #fff;
    text-decoration: underline;
}