/**
 * Neon Pulse Runner - Styles
 * Synthwave-inspired visual design with neon accents
 */

/* CSS Variables for theming */
:root {
    --color-bg: #0a0a1a;
    --color-bg-secondary: #151528;
    --color-grid: #00d4ff;
    --color-grid-dim: rgba(0, 212, 255, 0.3);
    --color-primary: #ff00a0;
    --color-primary-glow: rgba(255, 0, 160, 0.5);
    --color-secondary: #00d4ff;
    --color-secondary-glow: rgba(0, 212, 255, 0.5);
    --color-accent: #00ff88;
    --color-warning: #ffaa00;
    --color-danger: #ff3333;
    --color-text: #ffffff;
    --color-text-muted: #8888aa;
    --color-text-dark: #1a1a3e;
    
    --font-display: 'Orbitron', sans-serif;
    --font-body: 'Rajdhani', sans-serif;
    
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-xxl: 3rem;
    
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-full: 9999px;
    
    --transition-fast: 150ms ease;
    --transition-normal: 300ms ease;
    --transition-slow: 500ms ease;
    
    --shadow-glow: 0 0 20px var(--color-primary-glow);
    --shadow-glow-secondary: 0 0 20px var(--color-secondary-glow);
    --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.5);
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    touch-action: manipulation;
}

body {
    font-family: var(--font-body);
    background: var(--color-bg);
    color: var(--color-text);
    min-height: 100vh;
    overflow: hidden;
    user-select: none;
    -webkit-user-select: none;
    -webkit-tap-highlight-color: transparent;
}

/* Game Container */
#game-container {
    position: fixed;
    inset: 0;
    display: flex;
    flex-direction: column;
    background: radial-gradient(ellipse at center, var(--color-bg-secondary) 0%, var(--color-bg) 70%);
}

/* Screen Management */
.screen {
    position: absolute;
    inset: 0;
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
    opacity: 0;
    transform: translateY(20px);
    transition: opacity var(--transition-normal), transform var(--transition-normal);
}

.screen.active {
    display: flex;
    opacity: 1;
    transform: translateY(0);
}

/* Loading Screen */
#screen-loading {
    z-index: 100;
    background: var(--color-bg);
}

.loading-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-lg);
    text-align: center;
}

.logo-pulse {
    width: 120px;
    height: 120px;
    position: relative;
}

.sphere-preview {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background: radial-gradient(circle at 30% 30%, #ff69b4, var(--color-primary));
    box-shadow: 
        0 0 40px var(--color-primary-glow),
        inset -10px -10px 30px rgba(0,0,0,0.3);
    animation: pulse-glow 2s ease-in-out infinite;
}

@keyframes pulse-glow {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.05); opacity: 0.9; }
}

.game-title {
    font-family: var(--font-display);
    font-size: clamp(1.5rem, 5vw, 3rem);
    font-weight: 900;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    background: linear-gradient(135deg, var(--color-text) 0%, var(--color-secondary) 50%, var(--color-primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 0 30px var(--color-primary-glow);
}

.loading-bar-container {
    width: min(300px, 80vw);
    height: 8px;
    background: var(--color-bg-secondary);
    border-radius: var(--radius-full);
    overflow: hidden;
    border: 1px solid var(--color-grid-dim);
}

.loading-bar {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--color-secondary), var(--color-primary));
    border-radius: var(--radius-full);
    transition: width var(--transition-slow);
    box-shadow: 0 0 10px var(--color-secondary-glow);
}

.loading-text {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    letter-spacing: 0.1em;
}

.version-text {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    opacity: 0.6;
}

/* Main Menu */
#screen-menu {
    z-index: 90;
}

.menu-background {
    position: absolute;
    inset: 0;
    z-index: -1;
}

#menu-canvas {
    width: 100%;
    height: 100%;
    opacity: 0.4;
}

.menu-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xl);
    text-align: center;
    z-index: 1;
}

.menu-title {
    margin-bottom: var(--spacing-sm);
}

.tagline {
    font-size: 1.1rem;
    color: var(--color-text-muted);
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-lg);
}

.menu-buttons {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    width: min(280px, 80vw);
}

/* Buttons */
.btn {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    font-family: var(--font-display);
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--color-text);
    background: transparent;
    border: 2px solid var(--color-grid);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--color-secondary), transparent);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.btn:hover:not(:disabled),
.btn:focus-visible:not(:disabled) {
    border-color: var(--color-secondary);
    box-shadow: var(--shadow-glow-secondary);
    transform: translateY(-2px);
}

.btn:hover:not(:disabled)::before,
.btn:focus-visible:not(:disabled)::before {
    opacity: 0.2;
}

.btn:active:not(:disabled) {
    transform: translateY(0);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary), #cc0080);
    border-color: var(--color-primary);
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover:not(:disabled),
.btn-primary:focus-visible:not(:disabled) {
    box-shadow: 0 0 30px var(--color-primary-glow);
}

.btn-secondary {
    background: rgba(0, 212, 255, 0.1);
}

.btn-large {
    padding: var(--spacing-lg) var(--spacing-xxl);
    font-size: 1.1rem;
}

.btn-icon {
    font-size: 1.2em;
}

.btn-text {
    background: none;
    border: none;
    color: var(--color-secondary);
    text-decoration: underline;
    text-underline-offset: 3px;
    padding: var(--spacing-sm);
}

.btn-text:hover:not(:disabled) {
    color: var(--color-text);
}

.btn-back {
    margin-top: auto;
}

/* Mute Button */
.btn-mute {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: 2px solid var(--color-grid-dim);
    background: rgba(0, 212, 255, 0.1);
    color: var(--color-text);
    font-size: 1.2rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-mute:hover,
.btn-mute:focus-visible {
    border-color: var(--color-secondary);
    box-shadow: var(--shadow-glow-secondary);
}

.btn-mute[aria-pressed="true"] {
    opacity: 0.5;
}

/* Start Screen */
#screen-start {
    z-index: 80;
}

.start-content {
    width: min(500px, 90vw);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.screen-title {
    font-family: var(--font-display);
    font-size: 1.8rem;
    font-weight: 700;
    text-align: center;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-secondary);
    text-shadow: 0 0 20px var(--color-secondary-glow);
}

.start-preview {
    display: flex;
    gap: var(--spacing-lg);
    align-items: center;
    background: rgba(0, 212, 255, 0.05);
    border: 1px solid var(--color-grid-dim);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
}

.selected-orb-container {
    flex-shrink: 0;
}

.selected-orb {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: radial-gradient(circle at 30% 30%, #ff69b4, var(--color-primary));
    box-shadow: 0 0 30px var(--color-primary-glow);
}

.level-info {
    flex: 1;
}

.level-name {
    font-family: var(--font-display);
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.level-difficulty {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-sm);
}

.level-objectives h4 {
    font-size: 0.8rem;
    text-transform: uppercase;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-xs);
}

.level-objectives ul {
    list-style: none;
    font-size: 0.9rem;
}

.level-objectives li {
    padding: var(--spacing-xs) 0;
    padding-left: 1.2em;
    position: relative;
}

.level-objectives li::before {
    content: '◆';
    position: absolute;
    left: 0;
    color: var(--color-secondary);
    font-size: 0.6em;
    top: 50%;
    transform: translateY(-50%);
}

.stats-row {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
}

.stat-box {
    flex: 1;
    text-align: center;
    padding: var(--spacing-md);
    background: rgba(0, 0, 0, 0.3);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-grid-dim);
}

.stat-label {
    display: block;
    font-size: 0.75rem;
    text-transform: uppercase;
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-xs);
}

.stat-value {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-secondary);
}

.start-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
}

/* Game Screen */
#screen-game {
    z-index: 70;
    padding: 0;
}

#game-canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
}

.game-hud {
    position: absolute;
    inset: 0;
    pointer-events: none;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: var(--spacing-md);
}

.hud-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    pointer-events: auto;
}

.hud-left, .hud-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.hud-center {
    text-align: center;
}

.hud-stat {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.hud-label {
    font-size: 0.65rem;
    text-transform: uppercase;
    color: var(--color-text-muted);
    letter-spacing: 0.1em;
}

.hud-value {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
    text-shadow: 0 0 10px var(--color-secondary-glow);
}

.hud-btn {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 2px solid var(--color-grid);
    background: rgba(0, 0, 0, 0.5);
    color: var(--color-text);
    font-size: 1.2rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    pointer-events: auto;
}

.hud-btn:hover,
.hud-btn:focus-visible {
    border-color: var(--color-secondary);
    box-shadow: var(--shadow-glow-secondary);
}

.hud-bottom {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    pointer-events: auto;
}

.progress-container {
    flex: 1;
    height: 6px;
    background: rgba(0, 0, 0, 0.5);
    border-radius: var(--radius-full);
    overflow: hidden;
    border: 1px solid var(--color-grid-dim);
}

.progress-bar {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--color-secondary), var(--color-primary));
    border-radius: var(--radius-full);
    transition: width 0.1s linear;
    box-shadow: 0 0 10px var(--color-secondary-glow);
}

.btn-hint {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    border: 2px solid var(--color-warning);
    background: rgba(255, 170, 0, 0.1);
    color: var(--color-warning);
    font-family: var(--font-display);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    pointer-events: auto;
}

.btn-hint:hover,
.btn-hint:focus-visible {
    background: rgba(255, 170, 0, 0.2);
    box-shadow: 0 0 15px rgba(255, 170, 0, 0.3);
}

.hint-icon {
    font-size: 1.1em;
}

.hint-count {
    min-width: 1.5em;
    text-align: center;
}

/* Touch Controls */
.touch-controls {
    position: absolute;
    bottom: 100px;
    left: 0;
    right: 0;
    display: none;
    justify-content: space-between;
    padding: 0 var(--spacing-xl);
    pointer-events: auto;
}

.touch-btn {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    border: 3px solid var(--color-grid-dim);
    background: rgba(0, 212, 255, 0.1);
    color: var(--color-text);
    font-size: 2rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    user-select: none;
}

.touch-btn:active {
    background: rgba(0, 212, 255, 0.3);
    border-color: var(--color-secondary);
    transform: scale(0.95);
}

@media (hover: none) and (pointer: coarse) {
    .touch-controls {
        display: flex;
    }
}

/* Overlays */
.overlay {
    position: absolute;
    inset: 0;
    background: rgba(10, 10, 26, 0.9);
    backdrop-filter: blur(5px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 100;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.overlay.active {
    display: flex;
    opacity: 1;
}

.overlay-content {
    text-align: center;
    padding: var(--spacing-xl);
}

.overlay-title {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: var(--spacing-xl);
    text-transform: uppercase;
}

.overlay-buttons {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    width: min(280px, 80vw);
    margin: 0 auto;
}

.overlay-screen {
    z-index: 100;
    background: rgba(10, 10, 26, 0.95);
}

.success-title {
    color: var(--color-accent);
    text-shadow: 0 0 30px rgba(0, 255, 136, 0.5);
}

.failure-title {
    color: var(--color-danger);
    text-shadow: 0 0 30px rgba(255, 51, 51, 0.5);
}

.failure-reason {
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-xl);
}

.score-breakdown {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--color-grid-dim);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    text-align: left;
}

.score-row {
    display: flex;
    justify-content: space-between;
    padding: var(--spacing-xs) 0;
    color: var(--color-text-muted);
}

.score-row.total {
    border-top: 1px solid var(--color-grid-dim);
    margin-top: var(--spacing-sm);
    padding-top: var(--spacing-sm);
    color: var(--color-text);
    font-weight: 600;
}

.rewards {
    margin-bottom: var(--spacing-lg);
}

.reward-item {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid var(--color-secondary);
    border-radius: var(--radius-md);
    color: var(--color-secondary);
}

/* Modals */
.modal {
    position: absolute;
    inset: 0;
    background: rgba(10, 10, 26, 0.95);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 200;
    padding: var(--spacing-lg);
}

.modal.active {
    display: flex;
}

.modal-content {
    width: min(400px, 90vw);
    background: var(--color-bg-secondary);
    border: 2px solid var(--color-grid);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    box-shadow: var(--shadow-glow-secondary);
}

.modal-title {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--color-secondary);
}

.modal-text {
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-lg);
    line-height: 1.5;
}

.modal-buttons {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.modal-alt {
    margin-top: var(--spacing-md);
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

/* Garage Screen */
#screen-garage {
    z-index: 60;
}

.garage-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    max-width: 600px;
    margin-bottom: var(--spacing-lg);
}

.currency-display {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid var(--color-secondary);
    border-radius: var(--radius-md);
    font-family: var(--font-display);
    font-weight: 600;
    color: var(--color-secondary);
}

.currency-icon {
    font-size: 1.2em;
}

.garage-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-lg);
    width: 100%;
    max-width: 600px;
    overflow-y: auto;
}

.orb-preview {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
}

.orb-large {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: radial-gradient(circle at 30% 30%, #ff69b4, var(--color-primary));
    box-shadow: 0 0 40px var(--color-primary-glow);
    transition: all var(--transition-normal);
}

.orb-stats {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    width: 200px;
}

.orb-stats .stat {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 0.85rem;
}

.orb-stats .stat span {
    width: 60px;
    color: var(--color-text-muted);
}

.stat-bar {
    flex: 1;
    height: 8px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.stat-bar div {
    height: 100%;
    background: linear-gradient(90deg, var(--color-secondary), var(--color-primary));
    border-radius: var(--radius-full);
    transition: width var(--transition-normal);
}

.orb-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: var(--spacing-md);
    width: 100%;
    padding: var(--spacing-md);
}

.orb-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: rgba(0, 0, 0, 0.3);
    border: 2px solid var(--color-grid-dim);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.orb-item:hover,
.orb-item:focus-visible {
    border-color: var(--color-secondary);
    transform: translateY(-2px);
}

.orb-item.selected {
    border-color: var(--color-primary);
    box-shadow: 0 0 20px var(--color-primary-glow);
}

.orb-item.locked {
    opacity: 0.5;
    cursor: not-allowed;
}

.orb-item .orb-thumb {
    width: 60px;
    height: 60px;
    border-radius: 50%;
}

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

.orb-item .orb-cost {
    font-size: 0.7rem;
    color: var(--color-secondary);
}

.garage-footer {
    display: flex;
    gap: var(--spacing-md);
    margin-top: auto;
    padding-top: var(--spacing-lg);
}

/* Level Select */
#screen-levels {
    z-index: 50;
}

.levels-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(70px, 1fr));
    gap: var(--spacing-md);
    width: 100%;
    max-width: 500px;
    max-height: 60vh;
    overflow-y: auto;
    padding: var(--spacing-md);
}

.level-item {
    aspect-ratio: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.3);
    border: 2px solid var(--color-grid-dim);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.level-item:hover,
.level-item:focus-visible {
    border-color: var(--color-secondary);
    transform: scale(1.05);
}

.level-item.locked {
    opacity: 0.4;
    cursor: not-allowed;
}

.level-item.completed {
    border-color: var(--color-accent);
}

.level-item.current {
    border-color: var(--color-primary);
    box-shadow: 0 0 15px var(--color-primary-glow);
}

.level-number {
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 700;
}

.level-stars {
    font-size: 0.7rem;
    color: var(--color-warning);
}

/* Settings */
#screen-settings {
    z-index: 40;
}

.settings-content {
    width: min(400px, 90vw);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.setting-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    background: rgba(0, 0, 0, 0.2);
    border-radius: var(--radius-md);
}

.setting-row label {
    font-weight: 500;
}

/* Toggle Switch */
.toggle {
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
}

.toggle-track {
    display: block;
    width: 50px;
    height: 26px;
    background: rgba(0, 0, 0, 0.3);
    border: 2px solid var(--color-grid-dim);
    border-radius: var(--radius-full);
    position: relative;
    transition: all var(--transition-fast);
}

.toggle[aria-pressed="true"] .toggle-track {
    background: rgba(0, 212, 255, 0.2);
    border-color: var(--color-secondary);
}

.toggle-thumb {
    display: block;
    width: 18px;
    height: 18px;
    background: var(--color-text-muted);
    border-radius: 50%;
    position: absolute;
    top: 2px;
    left: 2px;
    transition: all var(--transition-fast);
}

.toggle[aria-pressed="true"] .toggle-thumb {
    left: 26px;
    background: var(--color-secondary);
    box-shadow: 0 0 10px var(--color-secondary-glow);
}

.setting-info {
    text-align: center;
    padding: var(--spacing-lg);
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

/* Help Screen */
#screen-help {
    z-index: 30;
}

.help-content {
    width: min(500px, 90vw);
    max-height: 60vh;
    overflow-y: auto;
    padding: var(--spacing-md);
}

.help-section {
    margin-bottom: var(--spacing-lg);
}

.help-section h3 {
    font-family: var(--font-display);
    font-size: 1.1rem;
    color: var(--color-secondary);
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
}

.help-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-sm) 0;
}

.help-key {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 60px;
    padding: var(--spacing-xs) var(--spacing-sm);
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--color-grid-dim);
    border-radius: var(--radius-sm);
    font-family: var(--font-display);
    font-size: 0.85rem;
    font-weight: 600;
}

.help-section p,
.help-section ul {
    color: var(--color-text-muted);
    line-height: 1.6;
}

.help-section ul {
    list-style: none;
    padding-left: 0;
}

.help-section li {
    padding: var(--spacing-xs) 0;
    padding-left: 1.5em;
    position: relative;
}

.help-section li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--color-secondary);
}

/* Accessibility */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    .sphere-preview,
    .orb-large,
    .selected-orb {
        animation: none;
    }
}

/* Focus styles */
:focus-visible {
    outline: 2px solid var(--color-secondary);
    outline-offset: 2px;
}

/* Screen reader only */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* Scrollbar styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--color-grid-dim);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-secondary);
}

/* Landscape orientation warning */
@media screen and (max-height: 500px) and (orientation: landscape) {
    #game-container::before {
        content: 'Rotate device for best experience';
        position: fixed;
        inset: 0;
        background: var(--color-bg);
        display: flex;
        align-items: center;
        justify-content: center;
        font-family: var(--font-display);
        font-size: 1.2rem;
        z-index: 1000;
        text-align: center;
        padding: var(--spacing-lg);
    }
}