/* CSS for the game interface, including styles for dark and light modes, animations, and responsive design */
@import url('https://fonts.googleapis.com/css2?family=Exo+2:wght@400;600&family=Orbitron&display=swap');

:root {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --text-primary: #f8fafc;
    --text-secondary: #cbd5e1;
    --accent-blue: #3b82f6;
    --accent-red: #ef4444;
    --accent-purple: #8b5cf6;
    --accent-green: #10b981;
    --accent-yellow: #f59e0b;
    --grid-color: #334155;
}

.light-mode {
    --bg-primary: #f1f5f9;
    --bg-secondary: #e2e8f0;
    --text-primary: #0f172a;
    --text-secondary: #334155;
    --grid-color: #cbd5e1;
}

body {
    font-family: 'Exo 2', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    overflow-x: hidden;
    margin: 0;
    padding: 0;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.game-title {
    font-family: 'Orbitron', sans-serif;
}

.game-container {
    position: relative;
    background-color: var(--bg-secondary);
    border-radius: 1rem;
    overflow: hidden;
    box-shadow: 0 0 40px rgba(99, 102, 241, 0.4);
    transition: background-color 0.3s ease;
}

.game-area {
    position: relative;
    background-color: var(--bg-primary);
    transition: background-color 0.3s ease;
}

.game-grid {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: linear-gradient(to right, var(--grid-color) 1px, transparent 1px),
                      linear-gradient(to bottom, var(--grid-color) 1px, transparent 1px);
    background-size: 50px 50px;
    opacity: 0.2;
}

.spaceship {
    position: absolute;
    transition: transform 0.1s ease;
    will-change: transform;
}

.spaceship-1 {
    filter: drop-shadow(0 0 8px rgba(59, 130, 246, 0.8));
}

.spaceship-2 {
    filter: drop-shadow(0 0 8px rgba(239, 68, 68, 0.8));
}

.bullet {
    position: absolute;
    border-radius: 50%;
    transform: translate(-50%, -50%);
    will-change: transform;
}

.bullet-1 {
    background-color: var(--accent-blue);
    box-shadow: 0 0 10px 2px rgba(59, 130, 246, 0.8);
}

.bullet-2 {
    background-color: var(--accent-red);
    box-shadow: 0 0 10px 2px rgba(239, 68, 68, 0.8);
}

.explosion {
    position: absolute;
    width: 40px;
    height: 40px;
    transform: translate(-50%, -50%);
    background: radial-gradient(circle, rgba(255,215,0,1) 0%, rgba(255,140,0,1) 50%, rgba(255,69,0,0) 100%);
    border-radius: 50%;
    opacity: 1;
    animation: explode 0.5s forwards;
}

@keyframes explode {
    0% {
        transform: translate(-50%, -50%) scale(0.5);
        opacity: 1;
    }
    100% {
        transform: translate(-50%, -50%) scale(2);
        opacity: 0;
    }
}

.health-bar {
    height: 10px;
    border-radius: 5px;
    background-color: var(--bg-primary);
    overflow: hidden;
    transition: background-color 0.3s ease;
}

.health-fill-1 {
    height: 100%;
    background: linear-gradient(90deg, #2563eb, #3b82f6);
    transition: width 0.3s ease;
}

.health-fill-2 {
    height: 100%;
    background: linear-gradient(90deg, #dc2626, #ef4444);
    transition: width 0.3s ease;
}

.shield {
    position: absolute;
    border-radius: 50%;
    border: 2px solid;
    opacity: 0.7;
    animation: shield-pulse 1.5s infinite;
}

.shield-1 {
    border-color: rgba(59, 130, 246, 0.8);
    box-shadow: 0 0 15px rgba(59, 130, 246, 0.4);
}

.shield-2 {
    border-color: rgba(239, 68, 68, 0.8);
    box-shadow: 0 0 15px rgba(239, 68, 68, 0.4);
}

@keyframes shield-pulse {
    0% { transform: translate(-50%, -50%) scale(1); opacity: 0.7; }
    50% { transform: translate(-50%, -50%) scale(1.1); opacity: 0.5; }
    100% { transform: translate(-50%, -50%) scale(1); opacity: 0.7; }
}

.power-up {
    position: absolute;
    width: 30px;
    height: 30px;
    transform: translate(-50%, -50%);
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0% { transform: translate(-50%, -50%) translateY(0px); }
    50% { transform: translate(-50%, -50%) translateY(-10px); }
    100% { transform: translate(-50%, -50%) translateY(0px); }
}

.star {
    position: absolute;
    background-color: white;
    border-radius: 50%;
    opacity: 0.8;
}

.controls-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(15, 23, 42, 0.9);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 100;
}

.light-mode .controls-overlay {
    background-color: rgba(241, 245, 249, 0.9);
}

.btn {
    transition: all 0.3s ease;
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

.btn:active {
    transform: translateY(-1px);
}

.game-over-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(15, 23, 42, 0.9);
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 100;
    transition: background-color 0.3s ease;
}

.light-mode .game-over-overlay {
    background-color: rgba(241, 245, 249, 0.9);
}

.winner-text {
    font-family: 'Orbitron', sans-serif;
    text-transform: uppercase;
    letter-spacing: 2px;
    text-shadow: 0 0 10px currentColor;
}

.player-controls {
    border: 2px solid;
    border-radius: 0.5rem;
    transition: border-color 0.3s ease, background-color 0.3s ease;
}

.player1-controls {
    border-color: rgba(59, 130, 246, 0.5);
}

.player2-controls {
    border-color: rgba(239, 68, 68, 0.5);
}

.key {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
    background-color: var(--bg-secondary);
    font-family: monospace;
    font-weight: bold;
    margin: 0 0.25rem;
    transition: background-color 0.3s ease;
}

.theme-toggle {
    position: fixed;
    top: 1rem;
    right: 1rem;
    z-index: 101;
    display: flex;
    align-items: center;
}

.toggle-switch {
    position: relative;
    display: inline-block;
    width: 60px;
    height: 30px;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #334155;
    transition: .4s;
    border-radius: 34px;
}

.toggle-slider:before {
    position: absolute;
    content: "";
    height: 22px;
    width: 22px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: .4s;
    border-radius: 50%;
}

input:checked + .toggle-slider {
    background-color: #4F46E5;
}

input:checked + .toggle-slider:before {
    transform: translateX(30px);
}

.toggle-icon {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    font-size: 14px;
}

.sun-icon {
    right: 8px;
}

.moon-icon {
    left: 8px;
    color: #f8fafc;
}

/* Skin selection styles */
.skin-selection-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(15, 23, 42, 0.95);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 100;
    transition: background-color 0.3s ease;
}

.light-mode .skin-selection-overlay {
    background-color: rgba(241, 245, 249, 0.95);
}

.skin-selection-container {
    width: 100%;
    max-width: 1000px;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.player-skin-selection {
    background-color: var(--bg-secondary);
    border-radius: 1rem;
    padding: 1.5rem;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1);
    transition: background-color 0.3s ease;
}

.skin-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

.skin-option {
    position: relative;
    aspect-ratio: 1/1;
    border-radius: 0.5rem;
    cursor: pointer;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.skin-option:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.2);
}

.skin-option.selected {
    box-shadow: 0 0 0 3px currentColor, 0 10px 15px -3px rgba(0, 0, 0, 0.2);
}

.skin-option svg {
    width: 100%;
    height: 100%;
    padding: 15%;
}

.skin-name {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: rgba(0, 0, 0, 0.7);
    color: white;
    text-align: center;
    padding: 0.25rem;
    font-size: 0.75rem;
    font-weight: 500;
}

.player-ready {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    background-color: var(--accent-green);
    color: white;
    border-radius: 9999px;
    width: 1.5rem;
    height: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.player-ready.active {
    opacity: 1;
}

.ready-btn {
    margin-top: 1rem;
    width: 100%;
    padding: 0.75rem;
    border-radius: 0.5rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: all 0.3s ease;
}

.ready-btn:hover {
    transform: translateY(-3px);
}

.ready-btn:active {
    transform: translateY(-1px);
}

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

.ready-btn.disabled:hover {
    transform: none;
}

.player1-ready-btn {
    background-color: var(--accent-blue);
    color: white;
}

.player2-ready-btn {
    background-color: var(--accent-red);
    color: white;
}

.start-game-btn {
    margin-top: 2rem;
    padding: 1rem 3rem;
    border-radius: 9999px;
    background: linear-gradient(135deg, #4f46e5, #8b5cf6);
    color: white;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 2px;
    box-shadow: 0 10px 25px -5px rgba(79, 70, 229, 0.5);
    transition: all 0.3s ease;
    opacity: 0;
    transform: translateY(20px);
    pointer-events: none;
}

.start-game-btn.active {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.start-game-btn:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px -5px rgba(79, 70, 229, 0.6);
}

.start-game-btn:active {
    transform: translateY(-2px);
}

/* Skin preview animation */
.skin-preview {
    position: relative;
    width: 100px;
    height: 100px;
    margin: 0 auto;
}

.skin-preview svg {
    width: 100%;
    height: 100%;
    filter: drop-shadow(0 0 10px currentColor);
    animation: hover-preview 3s ease-in-out infinite;
}

@keyframes hover-preview {
    0% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-10px) rotate(5deg); }
    100% { transform: translateY(0) rotate(0deg); }
}

/* Skin selection animation */
@keyframes select-skin {
    0% { transform: scale(1); }
    50% { transform: scale(1.2); }
    100% { transform: scale(1); }
}

.skin-option.just-selected svg {
    animation: select-skin 0.5s ease-out;
}

/* Responsive styles for mobile */
@media (max-width: 768px) {
    .theme-toggle {
        top: 0.75rem;
        right: 0.75rem;
    }
    
    .toggle-switch {
        width: 50px;
        height: 26px;
    }
    
    .toggle-slider:before {
        height: 18px;
        width: 18px;
        left: 4px;
        bottom: 4px;
    }
    
    input:checked + .toggle-slider:before {
        transform: translateX(24px);
    }
    
    .skin-selection-container {
        padding: 0 1rem;
    }
    
    .skin-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: 0.5rem;
    }
    
    .skin-name {
        font-size: 0.6rem;
    }
}