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

body {
    background: radial-gradient(circle at 20% 0%, #1c2c52 0%, #0a0e27 35%, #090c22 100%);
    color: #fff;
    display: flex;
    flex-direction: column;
    font-family: "Segoe UI", Arial, sans-serif;
    height: 100vh;
    overflow: hidden;
}

header {
    background: linear-gradient(90deg, #173d8f, #1f59d1, #173d8f);
    background-size: 200% 200%;
    animation: gradientShift 4s ease infinite;
    box-shadow: 0 12px 30px rgba(6, 16, 48, 0.5);
    padding: 18px;
    text-align: center;
}

@keyframes gradientShift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

h1 {
    color: #e9f1ff;
    font-size: 2.2em;
    font-weight: 900;
    letter-spacing: 1px;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.35);
}

.main {
    display: grid;
    flex: 1;
    gap: 15px;
    grid-template-columns: 1.2fr 0.8fr;
    min-height: 0;
    overflow: hidden;
    padding: 15px;
}

.canvas-container {
    display: flex;
    flex-direction: column;
    gap: 12px;
    min-height: 0;
}

canvas {
    background: linear-gradient(45deg, #000a1a 0%, #001a33 100%);
    border: 2px solid #2e70ff;
    border-radius: 8px;
    box-shadow: 0 14px 28px rgba(6, 16, 48, 0.42), inset 0 0 20px rgba(0, 140, 255, 0.08);
    display: block;
    flex: 1;
    min-height: 360px;
    width: 100%;
}

#c {
    min-height: 420px;
}

.controls {
    background: rgba(8, 14, 40, 0.86);
    border: 1px solid rgba(57, 125, 255, 0.55);
    border-radius: 8px;
    display: grid;
    gap: 12px;
    grid-template-columns: 1fr 1fr 1fr;
    padding: 10px;
    position: relative;
    z-index: 2;
}

button {
    border: 1px solid rgba(91, 161, 255, 0.75);
    border-radius: 8px;
    box-shadow: 0 8px 18px rgba(0, 0, 0, 0.25);
    cursor: pointer;
    font-size: 1.05em;
    font-weight: 800;
    letter-spacing: 0;
    min-height: 52px;
    padding: 14px 16px;
    text-transform: uppercase;
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

button:hover:not(:disabled) {
    border-color: #8fc3ff;
    box-shadow: 0 12px 24px rgba(17, 65, 170, 0.35);
    transform: translateY(-1px);
}

button:active:not(:disabled) {
    transform: scale(0.98);
}

button:disabled {
    cursor: not-allowed;
    opacity: 0.65;
    filter: saturate(0.75);
}

button:focus-visible {
    outline: 2px solid #7db6ff;
    outline-offset: 2px;
}

.start {
    background: linear-gradient(135deg, #07d08a, #03a56d);
    color: #f2fffb;
}

.stop {
    background: linear-gradient(135deg, #ef4f67, #cd2f49);
    color: #fff8fa;
}

.reset {
    background: linear-gradient(135deg, #ffbd55, #e69b2f);
    color: #1b1100;
}

.sidebar {
    display: flex;
    flex-direction: column;
    gap: 12px;
    min-height: 0;
    overflow-y: auto;
    padding-right: 8px;
}

.sidebar::-webkit-scrollbar {
    width: 8px;
}

.sidebar::-webkit-scrollbar-track {
    background: rgba(0, 255, 255, 0.1);
    border-radius: 10px;
}

.sidebar::-webkit-scrollbar-thumb {
    background: #00ffff;
    border-radius: 10px;
}

.panel {
    background: linear-gradient(135deg, rgba(10, 25, 56, 0.92), rgba(16, 40, 86, 0.88));
    border: 1px solid rgba(64, 140, 255, 0.72);
    border-radius: 10px;
    box-shadow: 0 12px 24px rgba(5, 12, 38, 0.35), inset 0 1px 1px rgba(255, 255, 255, 0.07);
    padding: 16px;
}

.panel h2 {
    color: #8ec5ff;
    font-size: 1.15em;
    letter-spacing: 1px;
    margin-bottom: 14px;
    text-transform: uppercase;
}

.stat-grid,
.mini-grid,
.mode-grid {
    display: grid;
    gap: 10px;
    grid-template-columns: 1fr 1fr;
}

.stat {
    background: rgba(0, 0, 0, 0.3);
    border-left: 4px solid #00ff88;
    border-radius: 5px;
    margin-bottom: 10px;
    padding: 12px;
}

.stat.compact {
    margin-bottom: 0;
    min-height: 88px;
}

.wide-stat {
    grid-column: 1 / -1;
}

.label {
    color: #88ccff;
    font-size: 0.75em;
    font-weight: 600;
    letter-spacing: 0.5px;
    margin-bottom: 4px;
    text-transform: uppercase;
}

.label-gap {
    margin-top: 8px;
}

.value {
    color: #00ff88;
    font-size: 2em;
    font-weight: 900;
    text-shadow: 0 0 10px rgba(0, 255, 136, 0.5);
}

.value.yellow {
    color: #ffff00;
    text-shadow: 0 0 10px rgba(255, 255, 0, 0.5);
}

.status-pill {
    color: #00ff88;
    font-size: 1.05em;
    font-weight: 900;
    line-height: 1.4;
}

.red-pill {
    color: #ff7777;
}

.countdown-track {
    background: rgba(0, 0, 0, 0.45);
    border: 1px solid rgba(0, 255, 255, 0.55);
    border-radius: 8px;
    height: 12px;
    margin-top: 8px;
    overflow: hidden;
}

.countdown-fill {
    background: linear-gradient(90deg, #00ff88, #ffff00);
    height: 100%;
    transition: width 0.2s ease;
    width: 0%;
}

.perf-rating {
    border-radius: 8px;
    font-size: 1.35em;
    font-weight: 900;
    letter-spacing: 1px;
    margin: 10px 0 12px;
    padding: 12px;
    text-align: center;
}

.rating-excellent { background: rgba(0, 255, 136, 0.2); border: 2px solid #00ff88; color: #00ff88; }
.rating-good { background: rgba(255, 255, 0, 0.2); border: 2px solid #ffff00; color: #ffff00; }
.rating-moderate { background: rgba(255, 165, 0, 0.2); border: 2px solid #ffa500; color: #ffa500; }
.rating-poor { background: rgba(255, 51, 51, 0.2); border: 2px solid #ff3333; color: #ff3333; }

.road-status {
    display: grid;
    gap: 8px;
    grid-template-columns: 1fr 1fr;
    margin-top: 8px;
}

.road-item {
    background: rgba(0, 0, 0, 0.3);
    border-radius: 5px;
    display: grid;
    font-size: 0.9em;
    gap: 4px;
    padding: 10px;
}

.road-name {
    font-weight: 800;
    letter-spacing: 0.5px;
}

.road-meta {
    color: #b8d8ff;
    font-size: 0.85em;
}

.road-active {
    border-left: 3px solid #00ff88;
}

.road-inactive {
    border-left: 3px solid #ff3333;
}

.mini-btn,
.mode-btn,
.density-btn {
    background: rgba(14, 24, 56, 0.95);
    border-width: 2px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
    color: #eaf4ff;
    font-size: 0.8em;
    min-height: 40px;
    padding: 9px;
}

.mode-btn.active {
    background: linear-gradient(135deg, #1f96ff, #2367f8);
    border-color: #8fc3ff;
    color: #ffffff;
}

.scenario-btn.active {
    background: linear-gradient(135deg, #7b5bff, #4c7bff);
    border-color: #b3c6ff;
    color: #ffffff;
}

.density-row {
    align-items: center;
    color: #d8f8ff;
    display: grid;
    gap: 7px;
    grid-template-columns: 1fr 34px 42px 34px;
    margin-bottom: 8px;
}

.density-value {
    color: #ffff00;
    font-weight: 900;
    text-align: center;
}

.priority-status {
    color: #ffff00;
    font-size: 0.9em;
    font-weight: 800;
    margin-top: 10px;
}

.scenario-status {
    color: #b8d8ff;
    font-size: 0.88em;
    line-height: 1.4;
    margin-top: 10px;
}

.mode-intensity-row {
    align-items: center;
    display: flex;
    justify-content: space-between;
    margin-top: 10px;
}

.mode-intensity-badge {
    border: 1px solid;
    border-radius: 8px;
    font-size: 0.78em;
    font-weight: 800;
    letter-spacing: 0;
    min-width: 86px;
    padding: 6px 10px;
    text-align: center;
    text-transform: uppercase;
}

.intensity-medium {
    background: rgba(255, 216, 77, 0.2);
    border-color: #ffd84d;
    color: #ffe58a;
}

.intensity-high {
    background: rgba(239, 79, 103, 0.2);
    border-color: #ef4f67;
    color: #ff9cad;
}

.intensity-variable {
    background: rgba(31, 150, 255, 0.2);
    border-color: #1f96ff;
    color: #9bd3ff;
}

.graph-list {
    display: grid;
    gap: 8px;
}

.graph-canvas-wrap {
    background: rgba(0, 0, 0, 0.26);
    border: 1px solid rgba(64, 140, 255, 0.42);
    border-radius: 8px;
    height: 220px;
    margin-bottom: 10px;
    overflow: hidden;
    padding: 8px;
}

#graph-canvas {
    border: 0;
    border-radius: 0;
    box-shadow: none;
    display: block;
    height: 100%;
    min-height: 0;
    width: 100%;
}

.graph-line {
    background: rgba(0, 0, 0, 0.28);
    border-left: 3px solid #00ffff;
    border-radius: 5px;
    color: #d8f8ff;
    font-size: 0.9em;
    padding: 8px;
}

.about-grid {
    display: grid;
    gap: 10px;
}

.about-item {
    background: rgba(0, 0, 0, 0.3);
    border-left: 3px solid #38a3ff;
    border-radius: 6px;
    padding: 10px;
}

.about-title {
    color: #9dd0ff;
    font-size: 0.86em;
    font-weight: 800;
    letter-spacing: 0.5px;
    margin-bottom: 4px;
    text-transform: uppercase;
}

.about-text {
    color: #d8ebff;
    font-size: 0.9em;
    line-height: 1.45;
}

.about-points {
    color: #d8ebff;
    font-size: 0.9em;
    line-height: 1.5;
    margin: 6px 0 0 18px;
}

.about-points li {
    margin-bottom: 4px;
}

.about-note {
    color: #9dd0ff;
    font-size: 0.84em;
    margin-top: 4px;
}

.about-points-more {
    margin-top: 0;
}

.about-more {
    display: none;
}

.about-more.open {
    display: block;
}

.about-toggle-btn {
    background: rgba(14, 24, 56, 0.95);
    border: 1px solid rgba(91, 161, 255, 0.75);
    border-radius: 8px;
    color: #d8ebff;
    font-size: 0.8em;
    font-weight: 800;
    margin-top: 8px;
    min-height: 36px;
    padding: 8px 12px;
    text-transform: uppercase;
}

.trend-wrap {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(0, 255, 255, 0.35);
    border-radius: 6px;
    height: 150px;
    overflow: hidden;
    padding: 8px;
}

#trend-chart {
    border: 0;
    border-radius: 0;
    box-shadow: none;
    display: block;
    height: 100%;
    min-height: 0;
    width: 100%;
}

.trend-legend {
    color: #b8d8ff;
    display: flex;
    font-size: 0.85em;
    gap: 14px;
    margin-top: 10px;
}

.legend-item {
    align-items: center;
    display: inline-flex;
    gap: 6px;
}

.legend-dot {
    border-radius: 50%;
    display: inline-block;
    height: 9px;
    width: 9px;
}

.queue-dot {
    background: #00ff88;
}

.flow-dot {
    background: #ffd84d;
}

@media (max-width: 980px) {
    body {
        height: auto;
        overflow: auto;
    }
    .main {
        grid-template-columns: 1fr;
        overflow: visible;
    }
    #c {
        min-height: 360px;
    }
    .controls {
        grid-template-columns: 1fr;
    }
}