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

:root {
    --bg-black: #000000;
    --text-white: #ffffff;
    --text-gray: #999999;
    --accent-red: #ff3333;
    --accent-green: #33ff33;
    --accent-yellow: #ffaa33;
    --accent-blue: #3388ff;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    background: var(--bg-black);
    color: var(--text-white);
    height: 100vh;
    height: 100dvh; /* Use dynamic viewport height for mobile */
    margin: 0;
    padding: 0;
    padding-top: env(safe-area-inset-top);
    padding-bottom: env(safe-area-inset-bottom);
    padding-left: env(safe-area-inset-left);
    padding-right: env(safe-area-inset-right);
    overflow: hidden;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    user-select: none;
    -webkit-user-select: none;
    -webkit-touch-callout: none;
}

/* Animated background circles */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: 
        radial-gradient(circle at 15% 25%, rgba(255, 51, 51, 0.15) 0%, transparent 40%),
        radial-gradient(circle at 85% 25%, rgba(255, 170, 51, 0.15) 0%, transparent 40%),
        radial-gradient(circle at 25% 75%, rgba(51, 255, 51, 0.15) 0%, transparent 40%),
        radial-gradient(circle at 75% 75%, rgba(51, 136, 255, 0.15) 0%, transparent 40%),
        radial-gradient(circle at 50% 50%, rgba(255, 51, 255, 0.08) 0%, transparent 50%);
    animation: float 20s ease-in-out infinite;
    z-index: -1;
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    33% { transform: translateY(-10px) rotate(120deg); }
    66% { transform: translateY(10px) rotate(240deg); }
}

/* Main container */
.game-container {
    position: relative;
    width: 100vw;
    height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    z-index: 1;
}

/* Header */
.header {
    position: absolute;
    top: 8vh;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    z-index: 2;
    width: 100%;
    padding: 0 1rem;
}

.title {
    font-size: clamp(1rem, 3.5vw, 1.4rem);
    font-weight: 400;
    color: var(--text-gray);
    margin-bottom: 0.3rem;
    letter-spacing: 0.02em;
}

.subtitle {
    font-size: clamp(1.8rem, 6vw, 3.2rem);
    font-weight: 700;
    color: var(--text-white);
    margin: 0;
    line-height: 1.1;
}

.highlight {
    background: linear-gradient(45deg, #ff3333, #ffaa33, #33ff33, #3388ff, #ff33ff);
    background-size: 300% 300%;
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: gradient 3s ease infinite;
}

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

/* Game area */
.game-area {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 2;
    margin-top: 10vh;
}

/* Canvas container */
.canvas-container {
    position: relative;
    margin: 0;
}

#drawingCanvas {
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    background: transparent;
    cursor: crosshair;
    transition: all 0.3s ease;
    display: block;
    max-width: 400px;
    max-height: 400px;
    width: min(400px, 70vmin);
    height: min(400px, 70vmin);
}

#drawingCanvas:hover {
    border-color: rgba(255, 255, 255, 0.3);
}

.drawing-active {
    border-color: rgba(255, 255, 255, 0.5) !important;
    box-shadow: 0 0 30px rgba(255, 255, 255, 0.1);
}

/* Canvas overlay */
.canvas-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.9);
    border-radius: 50%;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
    z-index: 3;
}

.canvas-overlay.hidden {
    opacity: 0;
    pointer-events: none;
    backdrop-filter: blur(0px);
}

/* Start button */
.start-btn {
    background: var(--text-white);
    color: var(--bg-black);
    border: none;
    width: min(80px, 15vmin);
    height: min(80px, 15vmin);
    border-radius: 50%;
    font-size: clamp(1.2rem, 3vmin, 1.5rem);
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 4px 20px rgba(255, 255, 255, 0.2);
    z-index: 100;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

.start-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 8px 30px rgba(255, 255, 255, 0.3);
}

.start-btn:active {
    transform: scale(0.95);
}

/* Score section - INITIALLY HIDDEN */
.score-section {
    position: relative;
    text-align: center;
    z-index: 4;
    pointer-events: none;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    margin-top: 1rem;
}

.score-section.show {
    opacity: 1;
    visibility: visible;
}

.score-value {
    font-size: clamp(2.5rem, 8vmin, 5rem);
    font-weight: 700;
    color: var(--accent-red);
    margin-bottom: 0.5rem;
    text-shadow: 0 0 30px currentColor;
    font-family: 'Courier New', monospace;
    line-height: 1;
}

.score-value.good {
    color: var(--accent-yellow);
}

.score-value.excellent {
    color: var(--accent-green);
}

.score-label {
    font-size: clamp(0.9rem, 2.5vmin, 1.2rem);
    color: var(--text-white);
    font-weight: 400;
    margin-bottom: 0.5rem;
}

.score-feedback {
    font-size: clamp(0.8rem, 2vmin, 1rem);
    color: var(--text-gray);
    margin-top: 0.3rem;
}

/* Controls - INITIALLY HIDDEN */
.controls {
    position: fixed;
    bottom: max(12vh, 80px);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 0.8rem;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 5;
}

/* Desktop layout fix - proper spacing for all elements */
@media (min-width: 769px) {
    .header {
        top: 6vh;
    }
    
    .game-area {
        margin-top: 8vh;
    }
    
    .score-section {
        margin-top: 1.5rem;
        margin-bottom: 2rem;
    }
    
    .controls {
        bottom: max(8vh, 60px);
    }
}

.controls.show {
    opacity: 1;
    visibility: visible;
}

.btn {
    padding: 0.6rem 1.2rem;
    border: none;
    border-radius: 25px;
    font-size: clamp(0.8rem, 2vmin, 0.9rem);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    min-width: 70px;
    white-space: nowrap;
}

.btn:hover {
    transform: translateY(-2px);
}

.btn:active {
    transform: translateY(0);
}

.btn-primary {
    background: var(--text-white);
    color: var(--bg-black);
}

.btn-primary:hover {
    background: #f0f0f0;
}

.btn-secondary {
    background: #1DA1F2;
    color: white;
}

.btn-secondary:hover {
    background: #1991DB;
}

.btn-copy {
    background: #8B5CF6;
    color: white;
}

.btn-copy:hover {
    background: #7C3AED;
}

/* Stats panel */
.stats-panel {
    position: fixed;
    top: 3rem;
    right: 1.5rem;
    background: rgba(0, 0, 0, 0.8);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    padding: 0.8rem;
    backdrop-filter: blur(20px);
    font-size: 0.8rem;
    z-index: 10;
    opacity: 0.7;
    transition: opacity 0.3s ease;
}

.stats-panel:hover {
    opacity: 1;
}

.stats-panel h3 {
    color: var(--text-white);
    margin-bottom: 0.6rem;
    font-size: 0.9rem;
    font-weight: 600;
}

.stat-item {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.3rem;
    min-width: 100px;
    gap: 0.5rem;
}

.stat-label {
    color: var(--text-gray);
    white-space: nowrap;
}

.stat-value {
    color: var(--text-white);
    font-weight: 600;
}

/* Sound controls */
.sound-controls {
    position: fixed;
    top: 1.5rem;
    left: 1.5rem;
    z-index: 10;
}

.sound-toggle {
    background: rgba(0, 0, 0, 0.8);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-white);
    width: 44px;
    height: 44px;
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.3s ease;
    backdrop-filter: blur(20px);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
}

.sound-toggle:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.3);
}

/* Keyboard hint */
.keyboard-hint {
    position: fixed;
    bottom: 3rem;
    left: 50%;
    transform: translateX(-50%);
    color: var(--text-gray);
    font-size: 0.7rem;
    opacity: 0.6;
    z-index: 10;
    text-align: center;
}

.keyboard-hint kbd {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 3px;
    padding: 0.15rem 0.3rem;
    font-family: 'Courier New', monospace;
    font-size: 0.65rem;
}

/* Hidden elements */
.instructions {
    display: none;
}

.footer {
    display: none;
}

/* Screen reader only content */
.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;
}

/* Animations */
@keyframes scoreAnimation {
    0% { transform: scale(0.8); opacity: 0; }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); opacity: 1; }
}

.score-animated {
    animation: scoreAnimation 0.6s cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

/* Landscape phone optimizations */
@media (max-width: 768px) and (orientation: landscape) {
    .header {
        top: max(5vh, 30px);
    }
    
    .title {
        font-size: clamp(0.8rem, 3vw, 1rem);
        margin-bottom: 0.1rem;
    }
    
    .subtitle {
        font-size: clamp(1.4rem, 5vw, 1.8rem);
    }
    
    #drawingCanvas {
        width: min(300px, 60vmin);
        height: min(300px, 60vmin);
    }
    
    .score-section {
        margin-top: 1rem;
    }
    
    .controls {
        bottom: 2vh;
        gap: 0.5rem;
    }
    
    .stats-panel {
        top: 0.5rem;
        left: 0.5rem;
        padding: 0.4rem;
        font-size: 0.65rem;
        max-width: 80px;
    }
    
    .sound-controls {
        top: 0.5rem;
        right: 0.5rem;
    }
    
    .sound-toggle {
        width: 32px;
        height: 32px;
    }
    
    .keyboard-hint {
        display: none;
    }
}

/* Mobile optimizations */
@media (max-width: 768px) {
    body {
        padding-top: max(env(safe-area-inset-top), 20px);
    }
    
    .header {
        top: max(8vh, 60px);
        padding: 0 1rem;
    }
    
    .title {
        font-size: clamp(0.9rem, 4vw, 1.1rem);
        margin-bottom: 0.2rem;
    }
    
    .subtitle {
        font-size: clamp(1.6rem, 7vw, 2.2rem);
    }
    
    .game-area {
        margin-top: 1vh;
    }
    
    #drawingCanvas {
        width: min(350px, 75vmin);
        height: min(350px, 75vmin);
    }
    
    .start-btn {
        width: min(70px, 14vmin);
        height: min(70px, 14vmin);
        font-size: clamp(1rem, 2.8vmin, 1.3rem);
    }
    
    .score-section {
        margin-top: 1.5rem;
    }
    
    .score-value {
        font-size: clamp(2.2rem, 7vmin, 3.8rem);
    }
    
    .score-label {
        font-size: clamp(0.8rem, 2.2vmin, 1rem);
    }
    
    .score-feedback {
        font-size: clamp(0.7rem, 1.8vmin, 0.9rem);
    }
    
    .controls {
        bottom: max(4vh, 40px);
        gap: 0.6rem;
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .btn {
        padding: 0.5rem 1rem;
        font-size: clamp(0.75rem, 1.8vmin, 0.85rem);
        min-width: 60px;
    }
    
    .stats-panel {
        top: 1rem;
        left: 1rem;
        right: auto;
        padding: 0.5rem;
        font-size: 0.7rem;
        max-width: 100px;
    }
    
    .stats-panel h3 {
        font-size: 0.75rem;
        margin-bottom: 0.4rem;
    }
    
    .stat-item {
        margin-bottom: 0.2rem;
        min-width: 70px;
        font-size: 0.65rem;
    }
    
    .sound-controls {
        top: 1rem;
        right: 1rem;
        left: auto;
    }
    
    .sound-toggle {
        width: 36px;
        height: 36px;
        font-size: 0.9rem;
    }
    
    .keyboard-hint {
        display: none;
    }
}

@media (max-width: 480px) {
    .header {
        top: max(6vh, 40px);
    }
    
    .title {
        font-size: clamp(0.8rem, 4.5vw, 1rem);
    }
    
    .subtitle {
        font-size: clamp(1.4rem, 8vw, 1.8rem);
    }
    
    #drawingCanvas {
        width: min(280px, 80vmin);
        height: min(280px, 80vmin);
    }
    
    .start-btn {
        width: min(60px, 12vmin);
        height: min(60px, 12vmin);
        font-size: clamp(0.9rem, 2.5vmin, 1.1rem);
    }
    
    .score-section {
        margin-top: 1rem;
    }
    
    .score-value {
        font-size: clamp(2rem, 6vmin, 3rem);
    }
    
    .controls {
        bottom: max(4vh, 40px);
        gap: 0.5rem;
    }
    
    .btn {
        padding: 0.45rem 0.8rem;
        font-size: clamp(0.7rem, 1.6vmin, 0.8rem);
        min-width: 55px;
    }
    
    .stats-panel {
        top: auto;
        bottom: max(8vh, 60px);
        padding: 0.4rem;
        font-size: 0.65rem;
        max-width: 90px;
        background: rgba(0, 0, 0, 0.9);
        border: 1px solid rgba(255, 255, 255, 0.2);
    }
    
    .stats-panel h3 {
        font-size: 0.7rem;
        margin-bottom: 0.3rem;
    }
    
    .stat-item {
        margin-bottom: 0.15rem;
        min-width: 60px;
        font-size: 0.6rem;
    }
    
    .sound-toggle {
        width: 32px;
        height: 32px;
        font-size: 0.8rem;
    }
}

@media (max-height: 600px) {
    .header {
        top: max(4vh, 25px);
    }
    
    .game-area {
        margin-top: 0;
    }
    
    .controls {
        bottom: 2vh;
    }
    
    .stats-panel,
    .sound-controls {
        top: 0.5rem;
    }
    
    .keyboard-hint {
        bottom: 0.5rem;
    }
}

@media (max-height: 500px) {
    .header {
        top: 2vh;
    }
    
    .title {
        margin-bottom: 0.1rem;
    }
    
    #drawingCanvas {
        width: min(250px, 60vmin);
        height: min(250px, 60vmin);
    }
    
    .controls {
        bottom: 1vh;
    }
}

/* Touch improvements */
@media (hover: none) {
    .btn:hover {
        transform: none;
    }
    
    .start-btn:hover {
        transform: none;
    }
    
    .btn:active {
        transform: scale(0.95);
        opacity: 0.8;
    }
    
    .start-btn:active {
        transform: scale(0.9);
    }
}

/* Focus states */
.btn:focus-visible,
.start-btn:focus-visible,
.sound-toggle:focus-visible {
    outline: 2px solid var(--text-white);
    outline-offset: 2px;
}

/* Canvas states */
#drawingCanvas:focus {
    outline: none;
}

/* Performance optimizations */
.canvas-container,
.score-section,
.controls {
    will-change: transform, opacity;
}

/* High DPI displays */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
    #drawingCanvas {
        image-rendering: -webkit-optimize-contrast;
        image-rendering: crisp-edges;
    }
}