:root {
    /* Colors */
    --bg-primary: #1a1a2e;
    --bg-secondary: #16213e;
    --bg-terminal: #0f0f1a;
    --text-primary: #eaeaea;
    --text-secondary: #a0a0a0;
    --accent-primary: #00d4aa;
    --accent-secondary: #e94560;
    --accent-warning: #f9a825;
    --border-color: #2a2a4a;
    
    /* Typography */
    --font-mono: 'Courier New', 'Consolas', 'Monaco', monospace;
    --font-sans: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    
    /* Border radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
}

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

html {
    font-size: 16px;
    height: 100%;
}

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    line-height: 1.6;
}

/* Header */
.game-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-xl);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}

.game-title {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    color: var(--accent-primary);
    text-shadow: 0 0 10px rgba(0, 212, 170, 0.3);
}

.language-selector {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.language-selector label {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.language-selector select {
    background: var(--bg-primary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.875rem;
    cursor: pointer;
    transition: border-color var(--transition-fast);
}

.language-selector select:hover,
.language-selector select:focus {
    border-color: var(--accent-primary);
    outline: none;
}

/* Main Container */
.game-container {
    flex: 1;
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-lg);
    padding: var(--spacing-lg);
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
    height: calc(100vh - 140px); /* Account for header and footer */
    min-height: 0; /* Important for flex child scrolling */
    overflow: hidden;
}

/* Visual Panel */
.visual-panel {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.scene-display {
    flex: 1;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 300px;
    padding: var(--spacing-lg);
    text-align: center;
    overflow-y: auto;
}

.scene-placeholder {
    color: var(--text-secondary);
    font-size: 1.25rem;
}

.scene-content {
    max-width: 100%;
}

.scene-title {
    color: var(--accent-primary);
    font-family: var(--font-mono);
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
    text-shadow: 0 0 10px rgba(0, 212, 170, 0.3);
}

.scene-description {
    color: var(--text-primary);
    font-size: 1rem;
    line-height: 1.6;
}

.scene-image {
    max-width: 100%;
    max-height: 100%;
    border-radius: var(--radius-sm);
}

.location-info {
    background: var(--bg-secondary);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    font-family: var(--font-mono);
}

.location-info span:first-child {
    color: var(--text-secondary);
}

#current-room {
    color: var(--accent-primary);
    font-weight: bold;
}

/* Terminal Panel */
.terminal-panel {
    display: flex;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
}

.terminal {
    flex: 1;
    background: var(--bg-terminal);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    font-family: var(--font-mono);
    height: 100%;
    max-height: 100%;
}

.terminal-output {
    flex: 1;
    padding: var(--spacing-md);
    overflow-y: auto;
    font-size: 0.9375rem;
    line-height: 1.5;
}

.terminal-line {
    margin-bottom: var(--spacing-sm);
    white-space: pre-wrap;
    word-break: break-word;
}

.terminal-line.output {
    color: var(--text-primary);
}

.terminal-line.error {
    color: var(--accent-secondary);
}

.terminal-line.success {
    color: var(--accent-primary);
}

.terminal-line.system {
    color: var(--accent-warning);
}

.terminal-input-line {
    display: flex;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(0, 0, 0, 0.3);
    border-top: 1px solid var(--border-color);
}

.prompt {
    color: var(--accent-primary);
    margin-right: var(--spacing-sm);
    font-weight: bold;
    user-select: none;
}

.terminal-input {
    flex: 1;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.9375rem;
    outline: none;
}

.terminal-input::placeholder {
    color: var(--text-secondary);
}

/* Scrollbar */
.terminal-output::-webkit-scrollbar {
    width: 8px;
}

.terminal-output::-webkit-scrollbar-track {
    background: var(--bg-terminal);
}

.terminal-output::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: var(--radius-sm);
}

.terminal-output::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

/* Footer */
.game-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) var(--spacing-xl);
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
}

.commands-hint {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.game-controls {
    display: flex;
    gap: var(--spacing-sm);
}

/* Buttons */
.btn {
    padding: var(--spacing-xs) var(--spacing-md);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 0.875rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn:hover {
    border-color: var(--accent-primary);
    background: rgba(0, 212, 170, 0.1);
}

.btn:focus {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}

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

.btn-secondary:hover {
    color: var(--text-primary);
}

/* Responsive */
@media (max-width: 900px) {
    .game-container {
        grid-template-columns: 1fr;
        grid-template-rows: auto 1fr;
    }
    
    .scene-display {
        min-height: 200px;
    }
    
    .game-header,
    .game-footer {
        padding: var(--spacing-md);
    }
}

@media (max-width: 600px) {
    .game-header {
        flex-direction: column;
        gap: var(--spacing-sm);
        text-align: center;
    }
    
    .game-footer {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
    
    .terminal-output {
        font-size: 0.875rem;
    }
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.terminal-line {
    animation: fadeIn var(--transition-fast);
}

/* Focus styles for accessibility */
*:focus-visible {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --bg-primary: #000;
        --bg-secondary: #111;
        --text-primary: #fff;
        --accent-primary: #0f0;
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}