:root {
    --bg-primary: #0a0f1e;
    --bg-secondary: #0f172a;
    --bg-tertiary: #1e293b;
    --text-primary: #e2e8f0;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --accent-primary: #6366f1;
    --accent-secondary: #8b5cf6;
    --accent-danger: #ef4444;
    --border-color: rgba(99, 102, 241, 0.2);
    --shadow-color: rgba(0, 0, 0, 0.4);
    --canvas-bg: #050810;

    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;

    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;

    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;
}

[data-theme="light"] {
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --text-primary: #0f172a;
    --text-secondary: #334155;
    --text-muted: #64748b;
    --accent-primary: #3b82f6;
    --accent-secondary: #6366f1;
    --accent-danger: #dc2626;
    --border-color: rgba(59, 130, 246, 0.2);
    --shadow-color: rgba(0, 0, 0, 0.1);
    --canvas-bg: #e2e8f0;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    transition: background-color 0.5s cubic-bezier(0.4, 0, 0.2, 1),
        color 0.5s cubic-bezier(0.4, 0, 0.2, 1),
        border-color 0.5s cubic-bezier(0.4, 0, 0.2, 1),
        fill 0.5s cubic-bezier(0.4, 0, 0.2, 1),
        stroke 0.5s cubic-bezier(0.4, 0, 0.2, 1),
        box-shadow 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
    overflow: hidden;
}

.container {
    max-width: 100%;
    margin: 0;
    padding: var(--spacing-md);
    height: 100vh;
    display: flex;
    flex-direction: column;
}

.header {
    text-align: center;
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--bg-secondary);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-color);
    position: relative;
    flex-shrink: 0;
}

.header-content {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-bottom: var(--spacing-xs);
}

.title-section {
    display: flex;
    justify-content: center;
    align-items: center;
}

.title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
    cursor: default;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: inline-block;
}

.title:hover {
    transform: scale(1.05) translateY(-2px);
    background: linear-gradient(135deg, #ec4899, #8b5cf6);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-shadow: 0 4px 12px rgba(139, 92, 246, 0.3);
}

.subtitle {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin: var(--spacing-xs) 0;
}

.tagline {
    font-size: 0.8rem;
    color: var(--text-muted);
}

body .back-home-btn {
    position: fixed;
    left: 24px;
    top: 24px;
    z-index: 10000;
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;

    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    font-size: 0.95rem;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.9) !important;
    text-decoration: none !important;
    letter-spacing: 0.02em;

    padding: 0.75rem;
    width: 48px;
    height: 48px;
    justify-content: center;
    background: linear-gradient(135deg,
            rgba(30, 41, 59, 0.9) 0%,
            rgba(15, 23, 42, 0.95) 100%);
    border: 1px solid rgba(139, 92, 246, 0.3);
    border-radius: 50%;

    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow:
        0 4px 20px -2px rgba(0, 0, 0, 0.5),
        0 0 0 1px rgba(139, 92, 246, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);

    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
    user-select: none;
    transform: translateZ(0);
}

body .back-home-btn:hover {
    background: linear-gradient(135deg,
            rgba(49, 46, 129, 0.8) 0%,
            rgba(30, 27, 75, 0.9) 100%);
    border-color: #d946ef;
    color: #ffffff !important;
    transform: translateY(-2px) scale(1.02);
    box-shadow:
        0 8px 25px -5px rgba(139, 92, 246, 0.5),
        0 0 12px rgba(217, 70, 239, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

body .back-home-btn svg {
    stroke: #a78bfa;
    transition: transform 0.3s ease;
    filter: drop-shadow(0 0 2px rgba(167, 139, 250, 0.5));
}

body .back-home-btn:hover svg {
    stroke: #fff;
    transform: translateX(-3px);
    filter: drop-shadow(0 0 4px rgba(255, 255, 255, 0.8));
}

.theme-toggle {
    position: absolute;
    top: 50%;
    right: var(--spacing-lg);
    transform: translateY(-50%);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 0.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    overflow: hidden;
}

.theme-toggle:hover {
    background: var(--accent-primary);
}

.theme-toggle .sun-icon,
.theme-toggle .moon-icon {
    color: var(--text-primary);
    position: absolute;
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.theme-toggle .sun-icon {
    opacity: 0;
    transform: rotate(-90deg) scale(0.5);
}

.theme-toggle .moon-icon {
    opacity: 1;
    transform: rotate(0) scale(1);
}

[data-theme="light"] .theme-toggle .sun-icon {
    opacity: 1;
    transform: rotate(0) scale(1);
}

[data-theme="light"] .theme-toggle .moon-icon {
    opacity: 0;
    transform: rotate(90deg) scale(0.5);
}

.main-content {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: var(--spacing-md);
    flex: 1;
    min-height: 0;
}


.control-panel {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
    border: 1px solid var(--border-color);
    overflow-y: auto;
    height: 100%;
    scrollbar-width: thin;
    scrollbar-color: var(--accent-primary) transparent;
}

.control-panel::-webkit-scrollbar {
    width: 6px;
}

.control-panel::-webkit-scrollbar-track {
    background: transparent;
}

.control-panel::-webkit-scrollbar-thumb {
    background-color: var(--accent-primary);
    border-radius: 20px;
    border: 2px solid transparent;
    background-clip: content-box;
}

.control-panel::-webkit-scrollbar-thumb:hover {
    background-color: var(--accent-secondary);
}

.panel-section {
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.panel-section:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.panel-title {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
    margin-bottom: var(--spacing-xs);
}

.button-group {
    display: flex;
    gap: var(--spacing-sm);
    width: 100%;
}

.button-group .btn {
    flex: 1 1 0;
    min-width: 0;
    width: 50% !important;
    text-align: center;
    justify-content: center;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 0 !important;
    min-height: 48px;
}

@keyframes shimmer {
    0% {
        transform: translateX(-150%) skewX(-15deg);
    }

    100% {
        transform: translateX(150%) skewX(-15deg);
    }
}

@keyframes pulse-glow {
    0% {
        box-shadow: 0 0 0 0 rgba(99, 102, 241, 0.4);
    }

    70% {
        box-shadow: 0 0 0 10px rgba(99, 102, 241, 0);
    }

    100% {
        box-shadow: 0 0 0 0 rgba(99, 102, 241, 0);
    }
}

.btn {
    width: 100%;
    padding: 0.75rem 1rem;
    border: none;
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: var(--spacing-sm);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    letter-spacing: 0.02em;
    z-index: 1;
}

.btn:last-child {
    margin-bottom: 0;
}

.btn::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 200%;
    height: 100%;
    background: linear-gradient(90deg,
            transparent,
            rgba(255, 255, 255, 0.2),
            transparent);
    transform: translateX(-150%) skewX(-15deg);
    transition: transform 0.5s;
    z-index: -1;
    pointer-events: none;
}

.btn:hover::after {
    animation: shimmer 1s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
    box-shadow: 0 4px 6px -1px rgba(99, 102, 241, 0.3),
        0 2px 4px -1px rgba(99, 102, 241, 0.15),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 15px rgba(99, 102, 241, 0.5),
        0 0 30px rgba(99, 102, 241, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
    text-shadow: 0 0 8px rgba(255, 255, 255, 0.5);
    border-color: rgba(255, 255, 255, 0.3);
}

.btn-primary:active {
    transform: translateY(0) scale(0.98);
    box-shadow: 0 2px 4px -1px rgba(99, 102, 241, 0.3);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.03);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    backdrop-filter: blur(4px);
}

.btn-secondary:hover {
    background: rgba(99, 102, 241, 0.1);
    border-color: var(--accent-primary);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 0 15px rgba(99, 102, 241, 0.2);
    text-shadow: 0 0 5px rgba(99, 102, 241, 0.5);
}

.btn-secondary:active {
    transform: translateY(0) scale(0.98);
}

.btn-danger {
    background: linear-gradient(135deg, var(--accent-danger), #b91c1c);
    color: white;
    box-shadow: 0 4px 6px -1px rgba(239, 68, 68, 0.3),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.btn-danger:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 15px rgba(239, 68, 68, 0.5),
        0 0 30px rgba(239, 68, 68, 0.3);
    text-shadow: 0 0 8px rgba(255, 255, 255, 0.5);
    border-color: rgba(255, 255, 255, 0.3);
}

.btn-danger:active {
    transform: translateY(0) scale(0.98);
}

.toggle-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.toggle-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
}

.toggle-text {
    color: var(--text-secondary);
}

.slider-control {
    margin-bottom: var(--spacing-md);
}

.slider-control label {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--spacing-xs);
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.slider-value {
    color: var(--accent-primary);
    font-weight: 600;
}

input[type="range"] {
    width: 100%;
    height: 4px;
    background: var(--bg-tertiary);
    border-radius: 2px;
    outline: none;
}

.visualization-column {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    flex: 1;
    min-height: 0;
}

.canvas-container {
    background: var(--canvas-bg);
    border-radius: var(--radius-lg);
    position: relative;
    overflow: hidden;
    border: 1px solid var(--border-color);
    flex: 1;
    display: flex;
    flex-direction: column;
}

canvas {
    display: block;
    width: 100%;
    height: 100%;
    min-height: 0;
}

.loading-indicator {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: var(--bg-secondary);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    font-weight: 600;
    color: var(--text-primary);
}

.canvas-info {
    background: var(--bg-secondary);
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 1rem;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9rem;
    color: var(--text-secondary);
    flex-shrink: 0;
}

.info-label {
    color: var(--text-muted);
    font-weight: 600;
}

.info-value {
    color: var(--accent-primary);
    font-weight: 500;
}

.info-divider {
    color: var(--border-color);
    margin: 0 0.5rem;
}

.info-panel {
    background: var(--bg-tertiary);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-top: var(--spacing-lg);
}

.info-text {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.segmented-control {
    display: flex;
    background: var(--bg-tertiary);
    padding: 4px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    gap: 4px;
}

.segment-btn {
    flex: 1;
    padding: 6px 12px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: 0.85rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.2s ease;
}

.segment-btn:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
}

.segment-btn.active {
    background: var(--accent-primary);
    color: white;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
}