/* Animated background gradient */
@keyframes gradient {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* Floating animation for UI elements */
@keyframes float {
    0% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
    100% { transform: translateY(0px); }
}

/* Pulse animation for buttons */
@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

/* CSS variables for consistent theming */
:root {
    --primary-color: #4a90e2;
    --secondary-color: #2ecc71;
    --background-color: #1a1a2e;
    --ui-background: rgba(26, 26, 46, 0.95);
    --text-color: #ffffff;
    --accent-color: #f39c12;
    --gradient-1: #1a1a2e;
    --gradient-2: #16213e;
    --gradient-3: #0f3460;
    
    /* Responsive sizing variables */
    --base-font-size: clamp(12px, 2.5vw, 16px);
    --h2-font-size: clamp(20px, 5vw, 32px);
    --button-font-size: clamp(14px, 3vw, 16px);
    --score-font-size: clamp(12px, 2.5vw, 16px);
    --level-font-size: clamp(10px, 2vw, 14px);
    
    /* Touch accessibility settings */
    --min-touch-size: 44px;
    --button-padding: clamp(8px, 2vw, 12px) clamp(20px, 4vw, 30px);
    
    /* Safe area support for notched devices */
    --safe-area-top: env(safe-area-inset-top, 0px);
    --safe-area-bottom: env(safe-area-inset-bottom, 0px);
    --safe-area-left: env(safe-area-inset-left, 0px);
    --safe-area-right: env(safe-area-inset-right, 0px);
}

/* Respect user's motion preferences */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Reset default styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* Main page styling */
body {
    background: linear-gradient(-45deg, var(--gradient-1), var(--gradient-2), var(--gradient-3));
    background-size: 400% 400%;
    animation: gradient 15s ease infinite;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100dvh; /* Use dynamic viewport height for mobile */
    font-family: 'Poppins', sans-serif;
    color: var(--text-color);
    overflow: hidden;
    margin: 0;
    padding: max(15px, var(--safe-area-top)) max(15px, var(--safe-area-left)) max(15px, var(--safe-area-bottom)) max(15px, var(--safe-area-right));
    font-size: var(--base-font-size);
}

/* Background particle container */
.background-particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

/* Main game container */
.game-container {
    position: relative;
    width: 100%;
    max-width: min(400px, 90vw);
    height: min(700px, 95dvh); /* Increased from 600px to 700px and 90dvh to 95dvh */
    min-height: 450px; /* Increased from 400px to 450px */
    background: var(--ui-background);
    border-radius: clamp(10px, 2vw, 20px);
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    border: 2px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    z-index: 1;
}

#gameCanvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100% !important;
    height: 100% !important;
    display: block; /* Prevent canvas scaling issues */
}

#ui {
    position: absolute;
    top: max(10px, var(--safe-area-top));
    left: 0;
    right: 0;
    padding: 0 clamp(10px, 3vw, 20px);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: clamp(5px, 2vw, 10px);
    z-index: 2;
}

.score-container {
    background: rgba(255, 255, 255, 0.1);
    padding: clamp(6px, 1.5vw, 8px) clamp(12px, 3vw, 16px);
    border-radius: clamp(10px, 2vw, 15px);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
    transform-origin: center;
    flex-shrink: 0;
    min-width: clamp(80px, 20vw, 110px);
    text-align: center;
}

.score-container.left {
    text-align: left;
}

.score-container.right {
    text-align: right;
}

#score, #highScore {
    font-size: var(--score-font-size);
    font-weight: 600;
    letter-spacing: 0.5px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
    white-space: nowrap;
}

.level-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: clamp(3px, 1vw, 5px);
    flex-grow: 1;
    max-width: clamp(120px, 30vw, 200px);
    margin: 0 clamp(5px, 2vw, 10px);
    background: rgba(255, 255, 255, 0.1);
    padding: clamp(6px, 1.5vw, 8px);
    border-radius: clamp(10px, 2vw, 15px);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.level-progress {
    width: 100%;
    height: clamp(6px, 1.5vw, 8px);
    background: rgba(255, 255, 255, 0.1);
    border-radius: clamp(2px, 1vw, 4px);
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.level-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    width: 0%;
    transition: width 0.3s ease;
}

.level-text {
    font-size: var(--level-font-size);
    font-weight: 600;
    color: var(--text-color);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
    margin-top: clamp(1px, 0.5vw, 2px);
}

.score-container.score-updated {
    animation: pulse 0.3s ease-out;
}

.overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    height: 100%;
    background: rgba(26, 26, 46, 0.98);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2;
    backdrop-filter: blur(10px);
    transition: opacity 0.5s ease;
}

.overlay.hidden {
    opacity: 0;
    pointer-events: none;
    visibility: hidden;
}

#gameOver, #instructions {
    background: rgba(255, 255, 255, 0.1);
    padding: clamp(15px, 4vw, 25px);
    border-radius: clamp(10px, 2.5vw, 15px);
    text-align: center;
    width: 90%;
    max-width: min(280px, 75vw);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transform: translateY(0);
    animation: float 6s ease-in-out infinite;
    margin: 0 auto;
}

.content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: clamp(6px, 2vw, 12px);
}

h2 {
    font-size: clamp(16px, 4vw, 24px);
    color: var(--accent-color);
    text-transform: uppercase;
    letter-spacing: clamp(0.5px, 0.3vw, 1px);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
    margin-bottom: clamp(3px, 1.5vw, 8px);
}

p {
    margin: clamp(3px, 1.5vw, 8px) 0;
    font-size: clamp(10px, 2.2vw, 14px);
    line-height: 1.4;
    color: rgba(255, 255, 255, 0.9);
}

button, .touch-button {
    background: linear-gradient(45deg, var(--primary-color), #357abd);
    color: white;
    border: none;
    padding: clamp(6px, 1.5vw, 10px) clamp(15px, 3.5vw, 25px);
    border-radius: clamp(15px, 4vw, 20px);
    font-size: clamp(12px, 2.5vw, 14px);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-top: clamp(6px, 2vw, 15px);
    box-shadow: 0 4px 15px rgba(74, 144, 226, 0.3);
    position: relative;
    overflow: hidden;
    min-height: var(--min-touch-size);
    min-width: var(--min-touch-size);
    display: flex;
    align-items: center;
    justify-content: center;
    
    /* Focus styles for accessibility */
    outline: none;
}

button:focus-visible, .touch-button:focus-visible {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
}

button:before, .touch-button:before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        120deg,
        transparent,
        rgba(255, 255, 255, 0.3),
        transparent
    );
    transition: 0.5s;
}

button:hover, .touch-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(74, 144, 226, 0.4);
}

button:hover:before, .touch-button:hover:before {
    left: 100%;
}

.controls-info {
    display: flex;
    justify-content: center;
    gap: clamp(6px, 2vw, 15px);
    margin: clamp(6px, 2vw, 12px) 0;
    flex-wrap: wrap;
}

.control-key {
    background: rgba(255, 255, 255, 0.1);
    padding: clamp(4px, 1.5vw, 8px) clamp(8px, 2.5vw, 15px);
    border-radius: clamp(6px, 1.5vw, 10px);
    font-size: clamp(8px, 2vw, 12px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
    min-height: var(--min-touch-size);
    display: flex;
    align-items: center;
    justify-content: center;
}

.control-key:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.score-value {
    font-size: clamp(24px, 8vw, 48px);
    font-weight: 700;
    color: var(--accent-color);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
    margin: clamp(5px, 2vw, 10px) 0;
}

.achievement {
    position: absolute;
    top: clamp(60px, 15vw, 80px);
    left: 50%;
    transform: translateX(-50%) translateY(-100%);
    background: rgba(255, 255, 255, 0.1);
    padding: clamp(8px, 2vw, 10px) clamp(15px, 3vw, 20px);
    border-radius: clamp(8px, 2vw, 10px);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    opacity: 0;
    transition: all 0.3s ease;
    font-size: var(--base-font-size);
}

.achievement.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

.platform-guide {
    width: 100%;
}

.platform-types {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(60px, 1fr));
    gap: clamp(4px, 1.5vw, 8px);
    margin-top: clamp(4px, 1.5vw, 8px);
}

.platform-type {
    display: flex;
    align-items: center;
    gap: clamp(3px, 1vw, 6px);
    font-size: clamp(8px, 2vw, 12px);
}

.platform-color {
    width: clamp(10px, 3vw, 15px);
    height: clamp(4px, 1.2vw, 6px);
    border-radius: clamp(1px, 0.5vw, 2px);
}

.platform-color.normal { background: #2ecc71; }
.platform-color.moving { background: #e74c3c; }
.platform-color.breakable { background: #f1c40f; }
.platform-color.boost { background: #9b59b6; }

/* Touch Controls */
.touch-controls {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 100%;
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    padding: 20px;
    pointer-events: none;
    z-index: 10;
}

.touch-controls.hidden {
    display: none;
}

.touch-area {
    width: clamp(80px, 15vw, 120px); /* Increased from 60px to 80px */
    height: clamp(80px, 15vw, 120px); /* Increased from 60px to 80px */
    background: rgba(255, 255, 255, 0.1);
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: auto;
    transition: all 0.2s ease;
    backdrop-filter: blur(10px);
    position: relative;
    min-width: 80px; /* Minimum size */
    min-height: 80px; /* Minimum size */
}

.touch-area:active {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(0.95);
    border-color: rgba(255, 255, 255, 0.6);
}

.left-touch::before {
    content: '←';
    font-size: clamp(24px, 5vw, 32px); /* Increased font size */
    color: white;
    font-weight: bold;
}

.right-touch::before {
    content: '→';
    font-size: clamp(24px, 5vw, 32px); /* Increased font size */
    color: white;
    font-weight: bold;
}

.jump-touch::before {
    content: '↑';
    font-size: clamp(24px, 5vw, 32px); /* Increased font size */
    color: white;
    font-weight: bold;
}

/* Responsive Breakpoints */
@media (max-width: 480px) {
    body {
        padding: 10px;
    }
    
    .game-container {
        height: min(700px, 95dvh);
        min-height: 500px;
    }
    
    #ui {
        padding: 0 clamp(10px, 3vw, 15px);
    }
    
    .score-container {
        min-width: clamp(70px, 18vw, 90px);
    }
    
    #gameOver, #instructions {
        padding: clamp(15px, 4vw, 25px);
    }
    
    .content {
        gap: clamp(10px, 3vw, 15px);
    }
    
    h2 {
        font-size: clamp(18px, 6vw, 24px);
    }
    
    p {
        font-size: clamp(12px, 3.5vw, 14px);
    }
    
    .controls-info {
        gap: clamp(8px, 2vw, 12px);
    }
    
    .control-key {
        font-size: clamp(10px, 2.5vw, 12px);
        padding: clamp(6px, 2vw, 8px) clamp(10px, 3vw, 12px);
    }
    
    .platform-type {
        font-size: clamp(10px, 2.5vw, 12px);
    }
    
    .score-value {
        font-size: clamp(14px, 4vw, 18px);
    }
    
    .stats {
        font-size: clamp(11px, 3vw, 13px);
        gap: clamp(5px, 1.5vw, 8px);
    }
    
    button, .touch-button {
        font-size: clamp(14px, 4vw, 16px);
        padding: clamp(10px, 3vw, 12px) clamp(20px, 5vw, 25px);
    }
    
    .level-container {
        min-width: clamp(80px, 20vw, 100px);
    }
    
    .level-text {
        font-size: clamp(10px, 2.5vw, 12px);
    }
    
    #score, #highScore {
        font-size: clamp(11px, 3vw, 13px);
    }
    
    .touch-controls {
        padding: 15px;
    }
    
    .touch-area {
        width: clamp(90px, 18vw, 130px); /* Even bigger on mobile */
        height: clamp(90px, 18vw, 130px); /* Even bigger on mobile */
        min-width: 90px; /* Bigger minimum on mobile */
        min-height: 90px; /* Bigger minimum on mobile */
    }
    
    .touch-area::before {
        font-size: clamp(28px, 6vw, 36px); /* Bigger arrows on mobile */
    }
}

/* Tablet Landscape */
@media (min-width: 481px) and (max-width: 1024px) and (orientation: landscape) {
    .game-container {
        max-width: min(600px, 80vw);
        height: min(400px, 80dvh);
    }
    
    .touch-controls {
        bottom: max(10px, var(--safe-area-bottom));
    }
}

/* Laptop-specific optimizations */
@media (min-width: 1024px) and (max-width: 1400px) {
    .game-container {
        height: min(650px, 92dvh); /* Optimized for laptop screens */
        min-height: 500px;
        max-width: min(450px, 85vw); /* Slightly wider for laptop screens */
    }
    
    #ui {
        padding: 0 clamp(15px, 2vw, 25px);
    }
    
    .score-container {
        min-width: clamp(90px, 15vw, 120px);
    }
}

/* Large desktop optimizations */
@media (min-width: 1200px) {
    .game-container {
        height: min(700px, 95dvh);
        min-height: 450px;
        max-width: min(500px, 80vw); /* Wider for large screens */
    }
    
    #ui {
        padding: 0 clamp(20px, 2.5vw, 30px);
    }
    
    .score-container {
        min-width: clamp(100px, 12vw, 130px);
    }
    
    h2 {
        font-size: clamp(24px, 4vw, 36px);
    }
    
    button, .touch-button {
        font-size: clamp(16px, 2.5vw, 18px);
        padding: clamp(12px, 2.5vw, 16px) clamp(25px, 4vw, 35px);
    }
}

/* High DPI Support */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    .game-container {
        border-width: 1px;
    }
    
    .touch-area {
        border-width: 1px;
    }
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
    .achievement {
        transition: none;
    }
    
    button, .touch-button {
        transition: none;
    }
    
    .control-key {
        transition: none;
    }
}

.jump-effect {
    position: absolute;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    animation: jumpEffect 1s ease-out;
    pointer-events: none;
}

.jump-effect.power-jump {
    background: rgba(255, 200, 0, 0.4);
    width: 60px;
    height: 60px;
    animation: powerJumpEffect 1s ease-out;
}

@keyframes jumpEffect {
    0% {
        transform: scale(1);
        opacity: 0.8;
    }
    100% {
        transform: scale(2);
        opacity: 0;
    }
}

@keyframes powerJumpEffect {
    0% {
        transform: scale(1);
        opacity: 0.8;
    }
    100% {
        transform: scale(3);
        opacity: 0;
    }
}