:root {
    --bg-main: #070d18;
    --bg-panel: #0d1726;
    --border-color: #1e293b;
    --accent-cyan: #00f2fe;
    --accent-blue: #0284c7;
    --accent-glow: rgba(0, 242, 254, 0.15);
    --text-main: #f8fafc;
    --text-dim: #94a3b8;
    --danger: #ef4444;
    --success: #22c55e;
    --warning: #f59e0b;
}

* { box-sizing: border-box; }
body {
    margin: 0;
    background-color: var(--bg-main);
    color: var(--text-main);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    display: flex;
    height: 100vh;
    overflow: hidden;
}

/* TOPBAR */
.topbar {
    position: fixed;
    top: 0; left: 0; right: 0;
    height: 60px;
    background: var(--bg-panel);
    border-bottom: 2px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    z-index: 1000;
}
.topbar-title {
    display: flex;
    align-items: center;
    gap: 12px;
}
.topbar-title img {
    width: 40px;
    height: 40px;
    object-fit: contain;
}
.topbar-title h3 {
    margin: 0;
    color: var(--accent-cyan);
    font-size: 15px;
    letter-spacing: 0.5px;
}
.topbar-title span {
    font-size: 11px;
    color: var(--text-dim);
}
.topbar-stats {
    display: flex;
    gap: 20px;
    font-size: 13px;
    align-items: center;
}
.badge-sim {
    background: rgba(0, 242, 254, 0.1);
    color: var(--accent-cyan);
    border: 1px solid var(--accent-cyan);
    padding: 3px 10px;
    border-radius: 4px;
    font-size: 11px;
}

/* SIDEBAR */
.sidebar {
    width: 260px;
    background: var(--bg-panel);
    border-right: 2px solid var(--border-color);
    margin-top: 60px;
    height: calc(100vh - 60px);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}
.menu-list {
    list-style: none;
    padding: 10px;
    margin: 0;
    overflow-y: auto;
}
.menu-item {
    padding: 12px 15px;
    margin-bottom: 5px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 13px;
    color: var(--text-dim);
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 10px;
}
.menu-item:hover, .menu-item.active {
    background: var(--accent-glow);
    color: var(--accent-cyan);
    border-left: 3px solid var(--accent-cyan);
}
.sidebar-status {
    padding: 15px;
    background: rgba(0,0,0,0.3);
    border-top: 1px solid var(--border-color);
    font-size: 12px;
}

/* MAIN CONTENT */
.main-content {
    margin-top: 60px;
    margin-left: 260px;
    width: calc(100vw - 260px);
    height: calc(100vh - 60px);
    padding: 20px;
    overflow-y: auto;
    background: var(--bg-main);
}
.tab-pane { display: none; }
.tab-pane.active { display: block; }

/* PANELS & CARDS */
.panel {
    background: var(--bg-panel);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 20px;
    margin-bottom: 20px;
}
.grid-metrics {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 15px;
    margin-bottom: 20px;
}
.metric-card {
    background: rgba(0,0,0,0.25);
    border: 1px solid var(--border-color);
    padding: 15px;
    border-radius: 6px;
}
.metric-title { font-size: 11px; color: var(--text-dim); text-transform: uppercase; }
.metric-value { font-size: 20px; font-weight: bold; color: var(--accent-cyan); margin-top: 5px; }

/* SENSORS HEALTH GRID */
.sensors-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
}
.sensor-card {
    background: rgba(0,0,0,0.3);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 15px;
    text-align: center;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}
.sensor-card img {
    width: 100%;
    height: 140px;
    object-fit: contain;
    background: #fff;
    border-radius: 6px;
    padding: 10px;
    margin-bottom: 12px;
    border: 1px solid var(--border-color);
}
.sensor-info {
    text-align: left;
}
.sensor-name {
    font-weight: bold;
    color: var(--accent-cyan);
    font-size: 14px;
    margin-bottom: 5px;
}
.sensor-val {
    font-size: 16px;
    font-weight: bold;
    color: #fff;
}
.sensor-status-text {
    font-size: 11px;
    color: var(--success);
    margin-top: 4px;
}

/* D-PAD CONTROLLER */
.control-layout {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 20px;
}
.dpad-container {
    background: rgba(0,0,0,0.3);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 25px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}
.dpad-grid {
    display: grid;
    grid-template-columns: repeat(3, 70px);
    grid-template-rows: repeat(3, 70px);
    gap: 10px;
}
.btn-dpad {
    background: #1e293b;
    color: var(--accent-cyan);
    border: 1px solid var(--accent-cyan);
    font-size: 22px;
    font-weight: bold;
    border-radius: 6px;
    cursor: pointer;
    transition: 0.1s;
    display: flex;
    align-items: center;
    justify-content: center;
}
.btn-dpad:hover { background: var(--accent-glow); }
.btn-dpad:active { transform: scale(0.95); background: var(--accent-cyan); color: #000; }
.btn-dpad.stop { background: rgba(239, 68, 68, 0.2); color: var(--danger); border-color: var(--danger); }
.btn-dpad.stop:active { background: var(--danger); color: #fff; }

/* RISK ASSESSMENT */
.risk-box {
    background: rgba(0,0,0,0.3);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 15px;
    text-align: center;
}
.risk-level-title { font-size: 12px; color: var(--text-dim); }
.risk-level-val { font-size: 24px; font-weight: bold; margin: 5px 0; letter-spacing: 1px; }
.risk-score-bar-bg {
    background: #1e293b;
    border-radius: 4px;
    height: 120px;
    width: 40px;
    margin: 15px auto 5px auto;
    display: flex;
    align-items: flex-end;
    border: 1px solid var(--border-color);
    overflow: hidden;
}
.risk-score-bar-fill {
    width: 100%;
    background: var(--success);
    height: 20%;
    transition: height 0.5s ease, background 0.5s ease;
}

.form-control {
    background: #070d18;
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 8px 12px;
    border-radius: 4px;
    width: 100%;
    margin-top: 5px;
    font-size: 13px;
}