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

:root {
    --bg-dark: #0a0a0a;
    --bg-medium: #1a1a1a;
    --bg-light: #2a2a2a;
    --neon-green: #00ff88;
    --neon-cyan: #00ddff;
    --amber: #ffaa00;
    --metal: #3a3a3a;
    --text-primary: #ffffff;
    --text-secondary: #aaaaaa;
}

body {
    font-family: 'Roboto Mono', monospace;
    background: var(--bg-dark);
    color: var(--text-primary);
    overflow-x: hidden;
}

/* Header */
.header {
    background: linear-gradient(180deg, var(--bg-medium) 0%, var(--bg-dark) 100%);
    padding: 1.5rem 2rem;
    border-bottom: 2px solid var(--neon-green);
    position: relative;
    box-shadow: 0 0 20px rgba(0, 255, 136, 0.3);
}

.header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: repeating-linear-gradient(
        0deg,
        transparent,
        transparent 2px,
        rgba(0, 255, 136, 0.03) 2px,
        rgba(0, 255, 136, 0.03) 4px
    );
    pointer-events: none;
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.title {
    font-family: 'Orbitron', sans-serif;
    font-size: 2.5rem;
    color: var(--neon-green);
    text-shadow: 0 0 10px var(--neon-green), 0 0 20px var(--neon-green);
    letter-spacing: 3px;
    margin-bottom: 0.5rem;
}

.subtitle {
    font-size: 0.9rem;
    color: var(--neon-cyan);
    letter-spacing: 2px;
    opacity: 0.8;
}

.berrry-bot {
    position: absolute;
    top: 1rem;
    right: 2rem;
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
}

.bot-avatar {
    font-size: 2rem;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.speech-bubble {
    background: var(--bg-light);
    border: 2px solid var(--neon-green);
    border-radius: 10px;
    padding: 0.75rem 1rem;
    max-width: 300px;
    font-size: 0.85rem;
    position: relative;
    box-shadow: 0 0 10px rgba(0, 255, 136, 0.2);
}

.speech-bubble::before {
    content: '';
    position: absolute;
    left: -10px;
    top: 15px;
    width: 0;
    height: 0;
    border-top: 10px solid transparent;
    border-bottom: 10px solid transparent;
    border-right: 10px solid var(--neon-green);
}

/* Menu Bar */
.menu-bar {
    background: var(--bg-light);
    padding: 0.75rem 2rem;
    display: flex;
    gap: 1rem;
    border-bottom: 1px solid var(--metal);
}

.menu-btn {
    background: var(--bg-medium);
    border: 1px solid var(--neon-green);
    color: var(--neon-green);
    padding: 0.5rem 1rem;
    font-family: 'Roboto Mono', monospace;
    cursor: pointer;
    transition: all 0.3s;
    border-radius: 3px;
}

.menu-btn:hover {
    background: var(--neon-green);
    color: var(--bg-dark);
    box-shadow: 0 0 10px var(--neon-green);
}

.menu-btn.active {
    background: var(--neon-green);
    color: var(--bg-dark);
}

/* Main Container */
.main-container {
    display: grid;
    grid-template-columns: 250px 1fr 200px;
    gap: 1rem;
    padding: 1rem;
    min-height: 70vh;
}

/* Control Panel */
.control-panel {
    background: var(--bg-medium);
    border: 1px solid var(--metal);
    border-radius: 5px;
    padding: 1rem;
    overflow-y: auto;
    max-height: 70vh;
}

.panel-title {
    font-family: 'Audiowide', sans-serif;
    color: var(--neon-cyan);
    font-size: 1.1rem;
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.light-selector {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.radio-option {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem;
    background: var(--bg-dark);
    border: 2px solid transparent;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.3s;
}

.radio-option:hover {
    border-color: var(--neon-green);
}

.radio-option input[type="radio"] {
    margin-right: 0.5rem;
}

.radio-option input[type="radio"]:checked + .icon {
    filter: drop-shadow(0 0 5px var(--neon-green));
}

.radio-option .icon {
    font-size: 1.5rem;
}

.radio-option small {
    display: block;
    color: var(--text-secondary);
    font-size: 0.75rem;
}

.light-controls {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.light-controls label {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    font-size: 0.85rem;
}

.light-controls input[type="range"] {
    width: 100%;
    accent-color: var(--neon-green);
}

.wavelength-preview {
    height: 20px;
    border-radius: 3px;
    border: 1px solid var(--metal);
    margin-top: 0.25rem;
}

.energy-pump {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--metal);
}

.energy-pump h4 {
    color: var(--amber);
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

.flash-btn {
    width: 100%;
    padding: 0.75rem;
    background: linear-gradient(135deg, var(--amber) 0%, #ff6600 100%);
    border: none;
    color: var(--bg-dark);
    font-weight: bold;
    cursor: pointer;
    border-radius: 5px;
    margin-top: 1rem;
    font-family: 'Roboto Mono', monospace;
    transition: all 0.3s;
}

.flash-btn:hover {
    box-shadow: 0 0 20px var(--amber);
    transform: scale(1.05);
}

.population-bar {
    margin-top: 1rem;
}

.bar-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.bar-container {
    background: var(--bg-dark);
    height: 20px;
    border-radius: 10px;
    overflow: hidden;
    border: 1px solid var(--metal);
}

.bar-fill {
    height: 100%;
    background: linear-gradient(90deg, #ff0000 0%, var(--neon-green) 100%);
    width: 0%;
    transition: width 0.5s;
}

/* Canvas Container */
.canvas-container {
    position: relative;
    background: var(--bg-dark);
    border: 2px solid var(--neon-green);
    border-radius: 5px;
    overflow: hidden;
    box-shadow: inset 0 0 30px rgba(0, 255, 136, 0.1);
}

#mainCanvas {
    display: block;
    width: 100%;
    height: 100%;
}

.canvas-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
}

/* Toolbox */
.toolbox {
    background: var(--bg-medium);
    border: 1px solid var(--metal);
    border-radius: 5px;
    padding: 1rem;
    overflow-y: auto;
    max-height: 70vh;
}

.tool-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.75rem;
}

.tool-item {
    background: var(--bg-dark);
    border: 2px solid var(--metal);
    border-radius: 5px;
    padding: 0.75rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    cursor: grab;
    transition: all 0.3s;
}

.tool-item:hover {
    border-color: var(--neon-cyan);
    box-shadow: 0 0 10px rgba(0, 221, 255, 0.3);
    transform: scale(1.05);
}

.tool-item:active {
    cursor: grabbing;
}

.tool-icon {
    font-size: 2rem;
}

.tool-name {
    font-size: 0.75rem;
    text-align: center;
    color: var(--text-secondary);
}

/* Info Panel */
.info-panel {
    background: var(--bg-medium);
    border-top: 1px solid var(--metal);
    padding: 1rem 2rem;
}

.info-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1400px;
    margin: 0 auto;
}

.physics-readout {
    display: flex;
    gap: 2rem;
    font-size: 0.85rem;
}

.physics-readout span {
    color: var(--text-secondary);
}

.physics-readout strong {
    color: var(--neon-green);
    margin-left: 0.25rem;
}

.info-toggle {
    background: var(--bg-dark);
    border: 1px solid var(--neon-cyan);
    color: var(--neon-cyan);
    padding: 0.5rem 1rem;
    cursor: pointer;
    border-radius: 3px;
    font-family: 'Roboto Mono', monospace;
}

.scientific-facts {
    margin-top: 1rem;
    padding: 1rem;
    background: var(--bg-dark);
    border: 1px solid var(--neon-cyan);
    border-radius: 5px;
}

.scientific-facts p {
    font-size: 0.9rem;
    line-height: 1.6;
    color: var(--neon-cyan);
}

/* App Footer */
.app-footer {
    background: var(--bg-medium);
    border-top: 1px solid var(--metal);
    padding: 1.5rem 2rem;
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.app-footer p {
    margin: 0.5rem 0;
}

.app-footer a {
    color: var(--neon-green);
    text-decoration: none;
    transition: color 0.3s;
}

.app-footer a:hover {
    color: var(--neon-cyan);
    text-shadow: 0 0 5px var(--neon-cyan);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
}

.modal-content {
    background: var(--bg-medium);
    margin: 5% auto;
    padding: 2rem;
    border: 2px solid var(--neon-green);
    border-radius: 10px;
    width: 80%;
    max-width: 600px;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: 0 0 30px rgba(0, 255, 136, 0.5);
}

.close {
    color: var(--text-secondary);
    float: right;
    font-size: 2rem;
    font-weight: bold;
    cursor: pointer;
    transition: color 0.3s;
}

.close:hover {
    color: var(--neon-green);
}

.tutorial-steps {
    margin-top: 1.5rem;
}

.step {
    margin-bottom: 1.5rem;
    padding: 1rem;
    background: var(--bg-dark);
    border-left: 3px solid var(--neon-cyan);
    border-radius: 5px;
}

.step h3 {
    color: var(--neon-cyan);
    margin-bottom: 0.75rem;
}

.step p, .step ul {
    color: var(--text-secondary);
    line-height: 1.6;
}

.step ul {
    margin-left: 1.5rem;
    margin-top: 0.5rem;
}

.step li {
    margin: 0.5rem 0;
}

/* Responsive */
@media (max-width: 1024px) {
    .main-container {
        grid-template-columns: 1fr;
    }
    
    .control-panel, .toolbox {
        max-height: none;
    }
    
    .berrry-bot {
        position: static;
        margin-top: 1rem;
    }
}

@media (max-width: 768px) {
    .title {
        font-size: 1.5rem;
    }
    
    .subtitle {
        font-size: 0.7rem;
    }
    
    .menu-bar {
        flex-wrap: wrap;
        gap: 0.5rem;
    }
    
    .physics-readout {
        flex-wrap: wrap;
        gap: 1rem;
    }
}