:root {
    color-scheme: dark;
    --background: #0f111a;
    --surface: #151822;
    --surface-alt: #1d2130;
    --text-primary: #f1f5ff;
    --text-secondary: #b7c0d9;
    --accent: #6c5ce7;
    --accent-soft: rgba(108, 92, 231, 0.18);
    --border: rgba(255, 255, 255, 0.08);
    font-family: "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 15px;
}

* {
    box-sizing: border-box;
}

body.app {
    margin: 0;
    min-height: 100vh;
    background: radial-gradient(circle at top, rgba(108, 92, 231, 0.08), transparent 55%),
                radial-gradient(circle at bottom, rgba(99, 110, 250, 0.12), transparent 60%),
                var(--background);
    color: var(--text-primary);
    display: flex;
    justify-content: center;
    align-items: stretch;
}

.layout {
    width: 100%;
    max-width: 1400px;
    display: grid;
    grid-template-columns: minmax(320px, 420px) minmax(0, 1fr);
    grid-template-rows: auto 1fr;
    grid-template-areas:
        "header header"
        "controls visualization";
    gap: 24px;
    padding: 24px clamp(20px, 3vw, 36px);
    min-height: 100vh;
}

.layout > * {
    min-width: 0;
}

.layout__header {
    grid-area: header;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
}

.layout__title {
    margin: 0;
    font-size: clamp(1.6rem, 2vw, 2rem);
    letter-spacing: 0.03em;
}

.mode-switcher {
    display: inline-flex;
    background: var(--surface);
    border-radius: 999px;
    padding: 4px;
    border: 1px solid var(--border);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.25);
}

.mode-switcher__button {
    position: relative;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    padding: 8px 16px;
    font-size: 0.85rem;
    font-weight: 600;
    border-radius: 999px;
    cursor: pointer;
    transition: color 0.2s ease, background 0.2s ease, box-shadow 0.2s ease;
}

.mode-switcher__button:hover,
.mode-switcher__button:focus-visible {
    color: var(--text-primary);
    outline: none;
}

.mode-switcher__button.is-active {
    color: var(--text-primary);
    background: linear-gradient(135deg, var(--accent), #a55eea);
    box-shadow: 0 6px 14px rgba(108, 92, 231, 0.35);
}

.layout__controls {
    grid-area: controls;
    display: grid;
    gap: 16px;
    background: var(--surface);
    padding: 20px;
    border-radius: 18px;
    border: 1px solid var(--border);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
    align-content: flex-start;
    min-height: 0;
}

.layout__controls > .control-group + .control-group {
    margin-top: 8px;
}

.control-group {
    display: grid;
    gap: 12px;
    background: var(--surface-alt);
    padding: 14px 16px 16px;
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.control-group__title {
    margin: 0;
    font-size: 0.95rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--text-secondary);
}

.control-group__sliders {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 12px;
    align-items: flex-start;
}

.slider {
    display: grid;
    gap: 8px;
    padding: 12px 14px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 14px;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.slider__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 8px;
}

.slider__label {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.95rem;
}

.slider__value {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.slider__number {
    width: 78px;
    padding: 6px 8px;
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.15);
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.9rem;
}

.slider__number:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 1px;
}

.slider__unit {
    font-size: 0.8rem;
    text-transform: uppercase;
}

.slider__range {
    width: 100%;
    -webkit-appearance: none;
    appearance: none;
    height: 6px;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.12);
    outline: none;
}

.slider__range::-webkit-slider-runnable-track {
    height: 6px;
    background: transparent;
}

.slider__range::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 0 4px rgba(108, 92, 231, 0.25);
    border: none;
    cursor: pointer;
}

.slider__range::-moz-range-track {
    height: 6px;
    background: transparent;
}

.slider__range::-moz-range-thumb {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--accent);
    border: none;
    box-shadow: 0 0 0 4px rgba(108, 92, 231, 0.25);
    cursor: pointer;
}

.slider__range::-moz-range-progress {
    background: rgba(108, 92, 231, 0.35);
    height: 6px;
}

.slider__unit[data-element="map-resolution-label"] {
    font-weight: 700;
}

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

.action-buttons__button {
    padding: 10px 16px;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(255, 255, 255, 0.04);
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: background 0.2s ease, color 0.2s ease, border 0.2s ease;
}

.action-buttons__button:hover:not([disabled]),
.action-buttons__button:focus-visible:not([disabled]) {
    background: linear-gradient(135deg, var(--accent), #a55eea);
    border-color: transparent;
    color: #fff;
    outline: none;
}

.action-buttons__button[disabled] {
    opacity: 0.45;
    cursor: not-allowed;
}

.action-buttons__button--secondary {
    background: rgba(255, 255, 255, 0.08);
    border-style: dashed;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

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

.metric-card {
    padding: 10px 14px;
    border-radius: 14px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.05);
    display: grid;
    gap: 4px;
}

.metric-card__label {
    font-size: 0.85rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-secondary);
}

.metric-card__value {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    font-variant-numeric: tabular-nums;
}

.metric-card__hint {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.layout__visualization {
    grid-area: visualization;
    display: grid;
    grid-template-columns: 1fr;
    grid-template-rows: 1fr;
    align-items: stretch;
    gap: 0;
    min-height: 0;
}

.visualization__canvas {
    position: relative;
    background: #06070f;
    border-radius: 24px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.35);
    overflow: hidden;
    aspect-ratio: 1 / 1;
    width: 100%;
    max-height: 100%;
}

#simulation-canvas {
    position: absolute;
    inset: 0;
    display: block;
    width: 100%;
    height: 100%;
}

.zoom-button {
    position: absolute;
    top: 14px;
    right: 14px;
    border: none;
    border-radius: 999px;
    background: rgba(0, 0, 0, 0.55);
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.9rem;
    padding: 6px 14px;
    cursor: pointer;
    transition: background 0.2s ease, transform 0.2s ease;
}

.zoom-button:hover,
.zoom-button:focus-visible {
    background: rgba(108, 92, 231, 0.85);
    transform: translateY(-1px);
    outline: none;
}

@media (max-width: 1024px) {
    body.app {
        height: auto;
        overflow: auto;
    }

    .layout {
        grid-template-columns: 1fr;
        grid-template-areas:
            "header"
            "controls"
            "visualization";
        height: auto;
        min-height: 100vh;
    }

    .layout__visualization {
        grid-template-columns: 1fr;
        min-height: 400px;
    }
}

@media (max-width: 720px) {
    .layout {
        padding: 24px 16px 32px;
    }

    .layout__controls {
        padding: 20px;
    }

    .control-group__sliders {
        grid-template-columns: 1fr;
    }

    .slider__number {
        width: 100%;
    }
}