/* ===== NEOTETRIS STYLES ===== */

body {
    margin: 0;
    padding: 0;
    background: linear-gradient(135deg, #1a1a2e, #16213e, #0f3460);
    background-size: 400% 400%;
    color: white;
    font-family: 'Courier New', monospace;
    overflow: hidden;
    animation: backgroundPulse 8s ease-in-out infinite;
}

@keyframes backgroundPulse {
    0% { background-position: 0% 50%; }
    25% { background-position: 50% 25%; }
    50% { background-position: 100% 50%; }
    75% { background-position: 50% 75%; }
    100% { background-position: 0% 50%; }
}

/* ===== MENU STYLES ===== */

.menu-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    background: linear-gradient(135deg, #1a1a2e, #16213e);
    z-index: 1000;
    animation: fadeIn 0.5s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: scale(0.95); }
    to { opacity: 1; transform: scale(1); }
}

.menu-container {
    text-align: center;
    max-width: 600px;
    padding: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    border: 2px solid rgba(0, 255, 255, 0.3);
    box-shadow: 0 0 30px rgba(0, 255, 255, 0.2);
    animation: menuGlow 2s ease-in-out infinite alternate;
    backdrop-filter: blur(10px);
}

@keyframes menuGlow {
    0% { 
        box-shadow: 0 0 30px rgba(0, 255, 255, 0.2);
        border-color: rgba(0, 255, 255, 0.3);
    }
    100% { 
        box-shadow: 0 0 50px rgba(0, 255, 255, 0.4), 0 0 100px rgba(255, 0, 255, 0.1);
        border-color: rgba(0, 255, 255, 0.6);
    }
}

.game-title {
    font-size: 4rem;
    margin: 0 0 10px 0;
    text-shadow: 0 0 20px #00ffff, 0 0 40px #ff00ff;
    background: linear-gradient(45deg, #00ffff, #ff00ff, #00ffff);
    background-size: 200% 200%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: titleShimmer 3s ease-in-out infinite;
}

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

.menu-subtitle {
    font-size: 1.2rem;
    color: #aaa;
    margin-bottom: 40px;
    animation: subtitleFloat 2s ease-in-out infinite alternate;
}

@keyframes subtitleFloat {
    0% { transform: translateY(0px); opacity: 0.7; }
    100% { transform: translateY(-5px); opacity: 1; }
}

.menu-buttons {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-bottom: 30px;
}

.menu-btn {
    background: rgba(0, 255, 255, 0.1);
    color: #00ffff;
    border: 2px solid #00ffff;
    padding: 15px 30px;
    border-radius: 10px;
    font-family: 'Courier New', monospace;
    font-size: 1.1rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    position: relative;
    overflow: hidden;
}

.menu-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.menu-btn:hover::before {
    left: 100%;
}

.menu-btn:hover {
    background: rgba(0, 255, 255, 0.2);
    box-shadow: 0 0 20px rgba(0, 255, 255, 0.5), inset 0 0 20px rgba(0, 255, 255, 0.1);
    transform: translateY(-2px) scale(1.02);
    text-shadow: 0 0 10px #00ffff;
}

.menu-btn.primary {
    background: linear-gradient(45deg, #00ffff, #66ffff);
    color: #1a1a2e;
    animation: primaryPulse 2s ease-in-out infinite;
}

@keyframes primaryPulse {
    0% { box-shadow: 0 0 10px rgba(0, 255, 255, 0.5); }
    50% { box-shadow: 0 0 20px rgba(0, 255, 255, 0.8), 0 0 30px rgba(0, 255, 255, 0.3); }
    100% { box-shadow: 0 0 10px rgba(0, 255, 255, 0.5); }
}

.menu-btn.primary:hover {
    background: linear-gradient(45deg, #66ffff, #99ffff);
    transform: translateY(-3px) scale(1.05);
}

.menu-btn.secondary {
    border-color: #ff0066;
    color: #ff0066;
}

.menu-btn.secondary:hover {
    background: rgba(255, 0, 102, 0.2);
    box-shadow: 0 0 20px rgba(255, 0, 102, 0.5);
    text-shadow: 0 0 10px #ff0066;
}

.menu-footer {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid rgba(0, 255, 255, 0.3);
    animation: footerGlow 3s ease-in-out infinite alternate;
}

@keyframes footerGlow {
    0% { border-color: rgba(0, 255, 255, 0.3); }
    100% { border-color: rgba(255, 0, 255, 0.3); }
}

.version {
    color: #666;
    font-size: 0.9rem;
}

.credits {
    color: #888;
    font-size: 0.8rem;
    margin-top: 5px;
}

/* ===== INSTRUCTIONS STYLES ===== */

.instructions-content {
    text-align: left;
    margin: 30px 0;
}

.controls-section,
.rules-section {
    margin-bottom: 30px;
}

.controls-section h3,
.rules-section h3 {
    color: #00ffff;
    margin-bottom: 15px;
    text-align: center;
    text-shadow: 0 0 10px #00ffff;
}

.control-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-bottom: 20px;
}

.control-item {
    display: flex;
    align-items: center;
    gap: 10px;
    animation: controlItemFloat 3s ease-in-out infinite;
}

.control-item:nth-child(odd) {
    animation-delay: 0.5s;
}

@keyframes controlItemFloat {
    0%, 100% { transform: translateX(0px); }
    50% { transform: translateX(3px); }
}

.key {
    background: linear-gradient(45deg, rgba(0, 255, 255, 0.2), rgba(0, 255, 255, 0.1));
    border: 1px solid #00ffff;
    padding: 5px 10px;
    border-radius: 5px;
    font-weight: bold;
    min-width: 60px;
    text-align: center;
    box-shadow: 0 0 10px rgba(0, 255, 255, 0.3);
    animation: keyGlow 2s ease-in-out infinite alternate;
}

@keyframes keyGlow {
    0% { box-shadow: 0 0 5px rgba(0, 255, 255, 0.3); }
    100% { box-shadow: 0 0 15px rgba(0, 255, 255, 0.6); }
}

.rules-section ul {
    margin: 0;
    padding-left: 20px;
}

.rules-section li {
    margin-bottom: 8px;
    line-height: 1.4;
}

/* ===== ABOUT STYLES ===== */

.about-content {
    text-align: left;
    margin: 30px 0;
}

.about-content h3 {
    color: #00ffff;
    margin: 20px 0 10px 0;
    text-shadow: 0 0 10px #00ffff;
}

.about-content p,
.about-content ul {
    line-height: 1.6;
    margin-bottom: 15px;
}

.about-content ul {
    padding-left: 20px;
}

.about-content li {
    margin-bottom: 8px;
}

/* ===== GAME CONTAINER STYLES ===== */

.game-container {
    display: flex;
    gap: 20px;
    align-items: flex-start;
    justify-content: center;
    min-height: 100vh;
    padding: 20px;
    box-sizing: border-box;
    animation: gameSlideIn 0.8s ease-out;
}

@keyframes gameSlideIn {
    from { 
        opacity: 0;
        transform: translateY(30px);
    }
    to { 
        opacity: 1;
        transform: translateY(0);
    }
}

canvas {
    border: 3px solid #00ffff;
    border-radius: 10px;
    box-shadow: 0 0 20px rgba(0, 255, 255, 0.5);
    animation: canvasGlow 3s ease-in-out infinite alternate;
}

@keyframes canvasGlow {
    0% { 
        box-shadow: 0 0 20px rgba(0, 255, 255, 0.5);
        border-color: #00ffff;
    }
    100% { 
        box-shadow: 0 0 30px rgba(0, 255, 255, 0.8), 0 0 50px rgba(255, 0, 255, 0.3);
        border-color: #66ffff;
    }
}

.sidebar,
.left-sidebar {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.info-panel {
    background: rgba(255, 255, 255, 0.1);
    padding: 15px;
    border-radius: 10px;
    border: 2px solid rgba(0, 255, 255, 0.3);
    min-width: 150px;
    backdrop-filter: blur(5px);
    animation: panelFloat 4s ease-in-out infinite alternate;
}

@keyframes panelFloat {
    0% { transform: translateY(0px); }
    100% { transform: translateY(-3px); }
}

.piece-preview {
    width: 100px;
    height: 80px;
    border: 2px solid rgba(0, 255, 255, 0.3);
    border-radius: 5px;
    margin-top: 10px;
    animation: previewGlow 2s ease-in-out infinite alternate;
}

@keyframes previewGlow {
    0% { border-color: rgba(0, 255, 255, 0.3); }
    100% { border-color: rgba(0, 255, 255, 0.7); }
}

.hold-instruction {
    font-size: 11px;
    text-align: center;
    margin-top: 5px;
    color: #aaa;
}

.controls {
    font-size: 12px;
    line-height: 1.4;
}

.game-actions {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.action-btn {
    background: rgba(0, 255, 255, 0.1);
    color: #00ffff;
    border: 1px solid rgba(0, 255, 255, 0.5);
    padding: 8px 12px;
    border-radius: 5px;
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.action-btn::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: radial-gradient(circle, rgba(0, 255, 255, 0.3) 0%, transparent 70%);
    transition: all 0.3s ease;
    transform: translate(-50%, -50%);
}

.action-btn:hover::after {
    width: 100px;
    height: 100px;
}

.action-btn:hover {
    background: rgba(0, 255, 255, 0.2);
    border-color: #00ffff;
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(0, 255, 255, 0.3);
}

.action-btn.secondary {
    border-color: rgba(255, 0, 102, 0.5);
    color: #ff0066;
}

.action-btn.secondary:hover {
    background: rgba(255, 0, 102, 0.2);
    border-color: #ff0066;
    box-shadow: 0 4px 8px rgba(255, 0, 102, 0.3);
}

h1 {
    text-align: center;
    margin-bottom: 10px;
    text-shadow: 0 0 10px #00ffff;
    animation: titlePulse 2s ease-in-out infinite alternate;
}

@keyframes titlePulse {
    0% { text-shadow: 0 0 10px #00ffff; }
    100% { text-shadow: 0 0 20px #00ffff, 0 0 30px #ff00ff; }
}

h3 {
    margin: 0 0 10px 0;
    text-align: center;
    color: #00ffff;
    text-shadow: 0 0 5px #00ffff;
}

/* ===== OVERLAY MENUS ===== */

.menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2000;
    animation: overlayFadeIn 0.3s ease-out;
}

@keyframes overlayFadeIn {
    from { 
        opacity: 0;
        backdrop-filter: blur(0px);
    }
    to { 
        opacity: 1;
        backdrop-filter: blur(5px);
    }
}

.pause-container,
.game-over-container {
    text-align: center;
    padding: 40px;
    background: rgba(26, 26, 46, 0.95);
    border-radius: 20px;
    border: 3px solid #00ffff;
    box-shadow: 0 0 30px rgba(0, 255, 255, 0.5);
    min-width: 300px;
    animation: containerBounceIn 0.5s ease-out;
    backdrop-filter: blur(10px);
}

@keyframes containerBounceIn {
    0% { 
        transform: scale(0.8) translateY(-50px);
        opacity: 0;
    }
    50% { 
        transform: scale(1.05) translateY(10px);
        opacity: 0.8;
    }
    100% { 
        transform: scale(1) translateY(0);
        opacity: 1;
    }
}

.pause-container h2,
.game-over-container h2 {
    margin-top: 0;
    text-shadow: 0 0 10px #00ffff;
    animation: headerGlow 2s ease-in-out infinite alternate;
}

@keyframes headerGlow {
    0% { text-shadow: 0 0 10px #00ffff; }
    100% { text-shadow: 0 0 20px #00ffff, 0 0 30px #ff00ff; }
}

.final-stats {
    margin: 30px 0;
    text-align: left;
}

.stat-item {
    margin: 10px 0;
    font-size: 1.1rem;
    display: flex;
    justify-content: space-between;
    animation: statSlideIn 0.5s ease-out forwards;
    opacity: 0;
    transform: translateX(-20px);
}

.stat-item:nth-child(1) { animation-delay: 0.1s; }
.stat-item:nth-child(2) { animation-delay: 0.2s; }
.stat-item:nth-child(3) { animation-delay: 0.3s; }

@keyframes statSlideIn {
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.stat-item span {
    color: #00ffff;
    font-weight: bold;
    text-shadow: 0 0 5px #00ffff;
}


.hold-used {
    opacity: 0.5;
    animation: holdUsedPulse 1s ease-in-out infinite alternate;
}

@keyframes holdUsedPulse {
    0% { opacity: 0.5; }
    100% { opacity: 0.3; }
}

.hold-used .piece-preview {
    border-color: rgba(255, 255, 255, 0.3) !important;
}

/* ===== LINE CLEAR EFFECT ===== */
.line-clear-effect {
    position: absolute;
    width: 100%;
    height: 30px;
    background: linear-gradient(90deg, 
        transparent 0%, 
        rgba(255, 255, 255, 0.8) 20%, 
        rgba(0, 255, 255, 0.6) 50%, 
        rgba(255, 255, 255, 0.8) 80%, 
        transparent 100%);
    animation: lineClearFlash 0.5s ease-out;
    pointer-events: none;
    z-index: 10;
}

@keyframes lineClearFlash {
    0% { 
        opacity: 0;
        transform: scaleX(0);
    }
    30% { 
        opacity: 1;
        transform: scaleX(1.2);
    }
    100% { 
        opacity: 0;
        transform: scaleX(1);
    }
}

/* ===== RESPONSIVE DESIGN ===== */

@media (max-width: 768px) {
    .game-container {
        flex-direction: column;
        align-items: center;
        padding: 10px;
    }
    
    .left-sidebar,
    .sidebar {
        flex-direction: row;
        width: 100%;
        justify-content: space-around;
    }
    
    .info-panel {
        min-width: auto;
        flex: 1;
        margin: 0 5px;
    }
    
    .game-title {
        font-size: 2.5rem;
    }
    
    .menu-container {
        margin: 20px;
        padding: 20px;
    }
    
    .control-list {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .game-title {
        font-size: 2rem;
    }
    
    .menu-btn {
        padding: 12px 20px;
        font-size: 1rem;
    }
}