:root {
    --bg-color: #0f172a;       /* Einheitlicher, cleaner Hintergrund */
    --text-color: #f8fafc;
    --text-muted: #64748b;     /* Etwas dezenter für weniger Ablenkung */
    --accent: #3b82f6;
}

/* Farbschema für die Elemente (Substanzen A bis E) */
.color-A { color: #ef4444; --sub-color: #ef4444; }
.color-B { color: #f97316; --sub-color: #f97316; }
.color-C { color: #eab308; --sub-color: #eab308; }
.color-D { color: #06b6d4; --sub-color: #06b6d4; }
.color-E { color: #10b981; --sub-color: #10b981; }

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    margin: 0;
    padding: 40px 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

header {
    text-align: center;
    margin-bottom: 40px;
}

h1 { 
    margin: 0 0 8px 0; 
    font-size: 3rem; 
    font-weight: 500; 
    letter-spacing: -0.5px; 
}

p { 
    margin: 0; 
    color: var(--text-muted); 
    font-size: 0.9rem; 
}

#undercaption {
    margin: 0; 
    color: var(--text-muted); 
    font-size: 1.5rem;
}

.container {
    display: grid;
    grid-template-columns: 1fr;
    gap: 40px;
    max-width: 1000px;
    width: 100%;
}

@media (min-width: 850px) {
    .container { grid-template-columns: 280px 1fr; }
}

/* Panels sind jetzt flach und strukturieren rein über Abstände */
.panel {
    padding: 0;
}

/* Controls / Stats */
.control-group {
    margin-bottom: 15px;
}

label {
    display: block;
    margin-bottom: 6px;
    color: var(--text-muted);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.time-display {
    font-size: 1.25rem;
    font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
    color: var(--text-color);
}

.btn-row {
    display: flex;
    gap: 8px;
    margin-bottom: 32px;
}

button {
    flex: 1;
    background-color: transparent;
    color: var(--text-muted);
    border: 1px solid #334155;
    padding: 8px 12px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 500;
    transition: all 0.15s ease;
}

button:hover { 
    color: var(--text-color);
    border-color: #475569; 
}

button.primary { 
    background-color: var(--accent); 
    color: white;
    border-color: var(--accent);
}

button.primary:hover { 
    background-color: #2563eb; 
    border-color: #2563eb;
}

select {
    width: 100%;
    box-sizing: border-box;
    background-color: #141e30;
    color: var(--text-color);
    border: 1px solid #334155;
    border-radius: 4px;
    padding: 8px 10px;
    font-size: 0.85rem;
}

select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

.preset-description {
    margin-top: 6px;
    line-height: 1.35;
}

/* Stats List */
.stat-item {
    margin-bottom: 16px;
}

.stat-header {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    margin-bottom: 6px;
}

/* Extrem minimalistischer, dünner Fortschrittsbalken */
.progress-bar-bg {
    background-color: #1e293b;
    height: 4px;
    border-radius: 2px;
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    width: 0%;
    transition: width 0.1s linear;
}

/* Canvas-Bereiche */
.visualization-area {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.simulation-stats-panel {
    padding: 16px 18px 18px;
    background: linear-gradient(180deg, rgba(20, 30, 48, 0.92), rgba(15, 23, 42, 0.95));
    border-radius: 8px;
}

.simulation-stats {
    margin-top: 14px;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.score-line {
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: 0.2px;
    color: var(--text-color);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 10px;
    margin-top: 10px;
}

.stat-pill {
    padding: 10px 12px;
    background-color: rgba(30, 41, 59, 0.72);
    border-radius: 6px;
}

.stat-pill-label {
    display: block;
    margin-bottom: 4px;
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
}

.stat-pill-value {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-color);
}

canvas {
    background-color: #141e30; /* Subtiler Kontrast zum Haupt-Hintergrund */
    border-radius: 6px;
    width: 100%;
    display: block;
}

.plotly-chart {
    width: 100%;
    height: 320px;
    background-color: #141e30;
    border-radius: 6px;
    margin-bottom: 10px;
}

.plotly-chart .modebar {
    top: 6px !important;
    right: 6px !important;
}

.plotly-chart .modebar-btn path {
    fill: #cbd5e1;
}

.canvas-container {
    position: relative;
    background-color: #141e30;
    padding: 10px;
    padding-bottom: 0;
    border-radius: 6px;
}

.canvas-label {
    font-size: 0.75rem;
    text-transform: uppercase;
    color: var(--text-muted);
    letter-spacing: 0.5px;
    pointer-events: none;
}

.canvas-container > .canvas-label {
    position: absolute;
    top: 12px;
    left: 12px;
}

.canvas-toolbar {
    z-index: 1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.segmented-control {
    display: flex;
    border: 1px solid #334155;
    border-radius: 4px;
    overflow: hidden;
    background-color: rgba(15, 23, 42, 0.8);
}

.segmented-control button {
    flex: none;
    min-width: 72px;
    border: 0;
    border-radius: 0;
    padding: 4px 8px;
    font-size: 0.75rem;
}

.segmented-control button.active {
    background-color: var(--accent);
    color: white;
}