/* Base Variables (Dark Mode) */
:root {
    --bg-color: #f8fafc;
    /* Removed transparency for performance */
    --glass-bg: #ffffff; 
    --glass-border: rgba(15, 23, 42, 0.08);
    --text: #0f172a;
    --text-muted: #475569;
    --green: #008d57;
    --red: #cf222e;
    --yellow: #856404;
    --border: #e2e8f0;
    --header-accent: #f1f5f9;
    --card-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.07);
    --tooltip-bg: #ffffff;
    --indicator-color: #0f172a;
    --chart-grid: rgba(15, 23, 42, 0.05);
}

/* Dark Mode Overrides */
body.dark-mode {
    --bg-color: #0b0e11;
    --glass-bg: #1e293b; 
    --glass-border: rgba(255, 255, 255, 0.1);
    --text: #eaecef;
    --text-muted: #64748b;
    --green: #02c076;
    --red: #f84960;
    --yellow: #facc15;
    --border: #334155;
    --header-accent: #1e293b;
    --card-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
    --tooltip-bg: #1e293b;
    --indicator-color: #ffffff;
    --chart-grid: rgba(255, 255, 255, 0.05);
}

body { 
    font-family: 'Inter', sans-serif; 
    background: var(--bg-color); 
    color: var(--text); 
    transition: background 0.3s ease, color 0.3s ease;
}

@media (min-width: 768px) {
     body { padding: 2rem; }
}

.glass-card { 
    background: var(--glass-bg); 
    /* backdrop-filter: blur(16px);  <-- Logic removed for performance */
    border: 1px solid var(--glass-border); 
    border-radius: 20px; 
    padding: 20px; 
    box-shadow: var(--card-shadow); 
    /* Promotes card to GPU layer */
    transform: translateZ(0);
}

.top-section { margin-bottom: 25px; }

.speedometer-wrap { 
    width: 100%; max-width: 350px; height: 180px; 
    background: rgba(125,125,125,0.03); 
    border-radius: 15px; border: 1px solid var(--glass-border); 
    padding: 15px; display: flex; flex-direction: column; 
    align-items: center; justify-content: center; position: relative; margin: 0 auto;
}

#gas-status-label {
    font-family: 'JetBrains Mono'; font-weight: 800; font-size: 1.1rem;
    margin-bottom: 2px; text-transform: uppercase;
}

.gas-stat-card { background: rgba(125,125,125,0.05); border: 1px solid var(--glass-border); border-radius: 12px; padding: 15px; text-align: center; height: 100%; }
.gas-stat-card h6 { font-size: 0.7rem; color: var(--text-muted); margin-bottom: 5px; text-transform: uppercase; letter-spacing: 1px; }
.gas-stat-card .val { font-size: 1.3rem; font-weight: 800; font-family: 'JetBrains Mono'; }
.gas-stat-card.low .val { color: var(--green); }
.gas-stat-card.avg .val { color: var(--yellow); }
.gas-stat-card.high .val { color: var(--red); }

.timer-wrap { font-size: 0.75rem; color: var(--text-muted); font-family: 'JetBrains Mono'; text-align: right; margin-bottom: 10px; }

.chart-container { display: flex; gap: 10px; align-items: stretch; }
.table-wrap { flex-grow: 1; overflow-x: auto; }

.line-chart-wrap { width: 100%; height: 280px; margin-bottom: 30px; padding: 15px; background: rgba(125,125,125,0.03); border-radius: 15px; border: 1px solid var(--glass-border); }
.gas-bar-container { width: 50px; display: flex; flex-direction: column; align-items: center; position: relative; padding: 10px 0; border-left: 1px solid var(--glass-border); }
.gas-bar { width: 10px; height: 100%; border-radius: 5px; background: linear-gradient(to top, var(--green), var(--yellow), var(--red)); position: relative; }

#indicator {
    position: absolute; width: 35px; height: 2px; background: var(--indicator-color); left: -12px;
    box-shadow: 0 0 10px var(--indicator-color); 
    transition: bottom 0.2s ease-out; 
    bottom: 0%;
    /* Hardware acceleration for the moving indicator */
    transform: translate3d(0, 0, 0);
}
#indicator-val {
    position: absolute; right: 40px; top: -8px; font-size: 0.65rem;
    color: var(--text); font-family: 'JetBrains Mono'; white-space: nowrap; opacity: 0; transition: opacity 0.2s;
}
.bar-label { font-size: 0.55rem; color: var(--text-muted); font-family: 'JetBrains Mono'; margin-bottom: 2px; text-align: center; }
.max-num { color: var(--red); font-weight: bold; margin-bottom: 5px; }

table { border-collapse: separate; border-spacing: 2px; width: 100%; position: relative; z-index: 2; }
@media (min-width: 768px) { table { min-width: 800px; } }

th, td { 
    padding: 4px 2px; text-align: center; border-radius: 4px; 
    font-family: 'JetBrains Mono', monospace; font-size: 0.65rem; 
    transition: transform 0.2s; cursor: crosshair; color: var(--text); 
}
@media (min-width: 768px) { 
    th, td { padding: 8px 4px; font-size: 0.75rem; } 
}
/* GPU accelerated hover */
td:hover { transform: scale3d(1.1, 1.1, 1); z-index: 10; box-shadow: 0 0 10px rgba(125,125,125,0.2); }

.row-label, .hdr-day { background: var(--header-accent) !important; font-weight: 800; border: 1px solid var(--border); }

.dot { width: 10px; height: 10px; background-color: var(--green); border-radius: 50%; display: inline-block; position: relative; }
.dot::after { 
    content: ""; position: absolute; top: 0; left: 0; width: 100%; height: 100%; 
    background-color: var(--green); border-radius: 50%; 
    animation: pulse 2s infinite; 
    will-change: transform, opacity;
}

.live-cell {
    position: relative; 
    animation: live-glow 2s infinite alternate;
    border: 1.5px solid var(--text) !important; 
    font-weight: bold;
    will-change: box-shadow;
}

/* Logic preserved, but optimized for frame rates */
@keyframes live-glow {
    0% { box-shadow: inset 0 0 5px rgba(125,125,125,0.1); }
    100% { box-shadow: inset 0 0 15px rgba(125,125,125,0.3); }
}
@keyframes pulse { 
    0% { transform: scale3d(1, 1, 1); opacity: 1; } 
    100% { transform: scale3d(3, 3, 1); opacity: 0; } 
}

#custom-tooltip {
    position: fixed; display: none; padding: 8px 12px; background: var(--tooltip-bg);
    border: 1px solid var(--glass-border); color: var(--text); border-radius: 8px; font-size: 0.75rem;
    font-family: 'JetBrains Mono'; pointer-events: none; z-index: 1000;
    box-shadow: var(--card-shadow); 
    /* backdrop-filter removed for performance */
    transform: translate3d(0,0,0);
}

.theme-toggle {
    cursor: pointer; padding: 5px 12px; border-radius: 20px; border: 1px solid var(--glass-border);
    background: var(--header-accent); color: var(--text); font-size: 0.75rem; font-weight: bold;
}