:root {
    --bg-primary: #0a0a0a;
    --bg-secondary: #1a1a1a;
    --bg-tertiary: #2a2a2a;
    --accent: #00ff88;
    --accent-secondary: #ff0080;
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --border: #333;
    --glass: rgba(255, 255, 255, 0.1);
    --glass-border: rgba(255, 255, 255, 0.2);
    --halloween-orange: #ff6a00;
    --halloween-purple: #6a0dad;
    --halloween-green: #00ff41;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', sans-serif;
    background: var(--bg-primary);
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(0, 255, 136, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 0, 128, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 20%, rgba(0, 255, 136, 0.05) 0%, transparent 50%);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
}

.app-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

.header {
    text-align: center;
    margin-bottom: 3rem;
}

.title {
    font-family: 'Orbitron', monospace;
    font-size: 3rem;
    font-weight: 900;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.title-glitch {
    display: inline-block;
    position: relative;
    color: var(--accent);
    animation: glitch 2s infinite;
}

@keyframes glitch {
    0%, 100% { transform: translate(0); }
    20% { transform: translate(-2px, 2px); }
    40% { transform: translate(-2px, -2px); }
    60% { transform: translate(2px, 2px); }
    80% { transform: translate(2px, -2px); }
}

.title-glitch {
    animation: glitch-halloween 2s infinite;
}

@keyframes glitch-halloween {
    0%, 100% { 
        transform: translate(0);
        color: var(--halloween-orange);
        text-shadow: 0 0 20px rgba(255, 106, 0, 0.8);
    }
    20% { 
        transform: translate(-2px, 2px);
        color: var(--halloween-purple);
    }
    40% { 
        transform: translate(-2px, -2px);
        color: var(--halloween-green);
    }
    60% { 
        transform: translate(2px, 2px);
        color: var(--halloween-orange);
    }
    80% { 
        transform: translate(2px, -2px);
        color: var(--halloween-purple);
    }
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1.2rem;
    font-weight: 300;
}

.upload-zone {
    border: 2px dashed var(--border);
    border-radius: 1rem;
    padding: 4rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: var(--bg-secondary);
    backdrop-filter: blur(10px);
    position: relative;
    overflow: hidden;
}

.upload-zone:hover {
    border-color: var(--halloween-orange);
    transform: translateY(-2px);
    box-shadow: 0 10px 40px rgba(255, 106, 0, 0.3);
}

.upload-zone.dragover {
    border-color: var(--accent);
    background: var(--bg-tertiary);
}

.upload-icon {
    color: var(--halloween-orange);
    margin-bottom: 1rem;
}

.upload-text {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.upload-hint {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.controls-panel {
    margin: 2rem 0;
    padding: 2rem;
    background: var(--bg-secondary);
    border-radius: 1rem;
    border: 1px solid var(--border);
}

.controls-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.control-label {
    font-size: 0.9rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.slider {
    -webkit-appearance: none;
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: var(--bg-tertiary);
    outline: none;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
    box-shadow: 0 0 10px rgba(0, 255, 136, 0.5);
}

.slider::-webkit-slider-thumb {
    background: var(--halloween-orange);
    box-shadow: 0 0 10px rgba(255, 106, 0, 0.5);
}

.select {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    padding: 0.75rem;
    color: var(--text-primary);
    font-size: 1rem;
}

.control-value {
    font-family: 'Orbitron', monospace;
    color: var(--accent);
    font-weight: 600;
}

.action-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.btn {
    padding: 1rem 2rem;
    border: none;
    border-radius: 0.5rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: linear-gradient(135deg, var(--halloween-orange), #ff9500);
    color: var(--bg-primary);
}

.btn-primary:hover {
    box-shadow: 0 5px 20px rgba(255, 106, 0, 0.4);
}

.btn-secondary {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(0, 255, 136, 0.3);
}

.canvas-container {
    margin: 2rem 0;
    position: relative;
    display: flex;
    justify-content: center;
}

#canvas {
    max-width: 100%;
    height: auto;
    border-radius: 1rem;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
}

.loading-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 1rem;
}

.loading-content {
    text-align: center;
}

.pixel-spinner {
    width: 40px;
    height: 40px;
    margin: 0 auto 1rem;
    background: var(--accent);
    box-shadow: 
        15px 15px 0 -5px var(--accent),
        -15px 15px 0 -5px var(--accent),
        15px -15px 0 -5px var(--accent),
        -15px -15px 0 -5px var(--accent);
    animation: pixel-spin 1s infinite;
}

@keyframes pixel-spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@media (max-width: 768px) {
    .title {
        font-size: 2rem;
    }
    
    .upload-zone {
        padding: 2rem;
    }
    
    .controls-grid {
        grid-template-columns: 1fr;
    }
}

.halloween-bats {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 10;
}

.bat {
    position: absolute;
    font-size: 2rem;
    animation: fly 15s infinite ease-in-out;
    filter: drop-shadow(0 0 10px rgba(255, 106, 0, 0.8));
}

.bat-1 {
    top: 20%;
    left: -50px;
    animation-delay: 0s;
}

.bat-2 {
    top: 50%;
    left: -50px;
    animation-delay: 5s;
    animation-duration: 18s;
}

.bat-3 {
    top: 70%;
    left: -50px;
    animation-delay: 10s;
    animation-duration: 12s;
}

@keyframes fly {
    0% {
        transform: translateX(0) translateY(0);
    }
    25% {
        transform: translateX(25vw) translateY(-20px);
    }
    50% {
        transform: translateX(50vw) translateY(20px);
    }
    75% {
        transform: translateX(75vw) translateY(-10px);
    }
    100% {
        transform: translateX(calc(100vw + 100px)) translateY(0);
    }
}

.halloween-pumpkins {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 10;
    pointer-events: none;
}

.pumpkin {
    font-size: 3rem;
    animation: glow 2s infinite alternate, float 3s infinite ease-in-out;
    filter: drop-shadow(0 0 20px rgba(255, 106, 0, 0.6));
}

.pumpkin-1 {
    animation-delay: 0s;
}

.pumpkin-2 {
    animation-delay: 1s;
    margin-left: 20px;
}

.pumpkin-3 {
    animation-delay: 2s;
    margin-left: 10px;
}

@keyframes glow {
    from {
        filter: drop-shadow(0 0 10px rgba(255, 106, 0, 0.6));
    }
    to {
        filter: drop-shadow(0 0 30px rgba(255, 106, 0, 1));
    }
}

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

.spider-web {
    position: fixed;
    top: 0;
    right: 0;
    width: 200px;
    height: 200px;
    pointer-events: none;
    z-index: 10;
}

.web {
    width: 100%;
    height: 100%;
    background: 
        linear-gradient(45deg, transparent 40%, rgba(255, 255, 255, 0.1) 50%, transparent 60%),
        linear-gradient(-45deg, transparent 40%, rgba(255, 255, 255, 0.1) 50%, transparent 60%),
        linear-gradient(90deg, transparent 40%, rgba(255, 255, 255, 0.1) 50%, transparent 60%),
        linear-gradient(0deg, transparent 40%, rgba(255, 255, 255, 0.1) 50%, transparent 60%);
    animation: web-shimmer 4s infinite;
}

@keyframes web-shimmer {
    0%, 100% {
        opacity: 0.3;
    }
    50% {
        opacity: 0.7;
    }
}

.floating-ghosts {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 5;
}

.ghost {
    position: absolute;
    font-size: 2.5rem;
    animation: haunt 20s infinite ease-in-out;
    filter: drop-shadow(0 0 15px rgba(255, 255, 255, 0.8));
}

.ghost-1 {
    top: 30%;
    left: 10%;
    animation-delay: 0s;
}

.ghost-2 {
    top: 60%;
    right: 15%;
    animation-delay: 8s;
    animation-duration: 25s;
}

@keyframes haunt {
    0%, 100% {
        transform: translateX(0) translateY(0) scale(1);
        opacity: 0.3;
    }
    25% {
        transform: translateX(50px) translateY(-30px) scale(1.1);
        opacity: 0.8;
    }
    50% {
        transform: translateX(-30px) translateY(20px) scale(0.9);
        opacity: 0.5;
    }
    75% {
        transform: translateX(20px) translateY(-10px) scale(1.05);
        opacity: 0.7;
    }
}