:root {
    --bg-primary: #0a0e27;
    --bg-secondary: #151b3b;
    --bg-tertiary: #1a2147;
    --accent-cyan: #00fff5;
    --accent-magenta: #ff006e;
    --accent-yellow: #ffbe0b;
    --text-primary: #e0e6ff;
    --text-secondary: #8892b8;
    --border-color: #2a3454;
    --success: #00ff88;
    --grid-color: rgba(0, 255, 245, 0.05);
}

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

body {
    font-family: 'JetBrains Mono', monospace;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

/* Animated grid background */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(var(--grid-color) 1px, transparent 1px),
        linear-gradient(90deg, var(--grid-color) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: gridScroll 20s linear infinite;
    pointer-events: none;
    z-index: 0;
}

@keyframes gridScroll {
    0% { transform: translate(0, 0); }
    100% { transform: translate(50px, 50px); }
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 40px 20px;
    position: relative;
    z-index: 1;
}

header {
    text-align: center;
    margin-bottom: 60px;
    animation: slideDown 0.6s ease-out;
}

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

h1 {
    font-family: 'Archivo Black', sans-serif;
    font-size: clamp(2.5rem, 6vw, 5rem);
    font-weight: 900;
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-magenta), var(--accent-yellow));
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -2px;
    margin-bottom: 10px;
    text-transform: uppercase;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 0.9rem;
    letter-spacing: 2px;
    text-transform: uppercase;
}

.main-section {
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 16px;
    padding: 40px;
    margin-bottom: 30px;
    position: relative;
    overflow: hidden;
    animation: fadeIn 0.8s ease-out 0.2s both;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.main-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-cyan), var(--accent-magenta), var(--accent-yellow));
}

.version-tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

.tab-btn {
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    padding: 12px 24px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    border-radius: 8px;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.tab-btn:hover {
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
    transform: translateY(-2px);
}

.tab-btn.active {
    background: var(--accent-cyan);
    color: var(--bg-primary);
    border-color: var(--accent-cyan);
    box-shadow: 0 0 20px rgba(0, 255, 245, 0.3);
}

.uuid-display {
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    padding: 30px;
    margin-bottom: 20px;
    position: relative;
    transition: all 0.3s ease;
}

.uuid-display:hover {
    border-color: var(--accent-cyan);
    box-shadow: 0 0 30px rgba(0, 255, 245, 0.1);
}

.uuid-text {
    font-size: clamp(1rem, 2.5vw, 1.5rem);
    color: var(--accent-cyan);
    text-align: center;
    word-break: break-all;
    font-weight: 600;
    letter-spacing: 1px;
    user-select: all;
    padding: 10px;
}

.uuid-text.copied {
    animation: pulse 0.5s ease;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.action-buttons {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 15px;
    margin-bottom: 30px;
}

.btn {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
    padding: 16px 24px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    border-radius: 10px;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
    transition: left 0.5s ease;
}

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

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 20px rgba(0, 255, 245, 0.2);
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-magenta));
    border-color: var(--accent-cyan);
    color: var(--bg-primary);
}

.btn-primary:hover {
    box-shadow: 0 5px 30px rgba(0, 255, 245, 0.4);
}

.bulk-section {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 15px;
    align-items: center;
    margin-bottom: 20px;
}

input[type="number"] {
    background: var(--bg-primary);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
    padding: 16px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 1rem;
    border-radius: 10px;
    width: 100%;
    transition: all 0.3s ease;
}

input[type="number"]:focus {
    outline: none;
    border-color: var(--accent-cyan);
    box-shadow: 0 0 20px rgba(0, 255, 245, 0.2);
}

.bulk-output {
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
    max-height: 300px;
    overflow-y: auto;
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.8;
    display: none;
    margin-top: 20px;
}

.bulk-output.show {
    display: block;
    animation: slideUp 0.4s ease;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.bulk-output::-webkit-scrollbar {
    width: 8px;
}

.bulk-output::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
    border-radius: 4px;
}

.bulk-output::-webkit-scrollbar-thumb {
    background: var(--accent-cyan);
    border-radius: 4px;
}

.info-section {
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 16px;
    padding: 30px;
    animation: fadeIn 0.8s ease-out 0.4s both;
}

.info-section h2 {
    font-family: 'Archivo Black', sans-serif;
    color: var(--accent-yellow);
    margin-bottom: 15px;
    font-size: 1.5rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.info-section p {
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 15px;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.info-card {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 20px;
    transition: all 0.3s ease;
}

.info-card:hover {
    border-color: var(--accent-cyan);
    transform: translateY(-5px);
}

.info-card h3 {
    color: var(--accent-cyan);
    margin-bottom: 10px;
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.info-card p {
    font-size: 0.85rem;
    margin-bottom: 0;
}

.toast {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: var(--success);
    color: var(--bg-primary);
    padding: 16px 24px;
    border-radius: 10px;
    font-weight: 600;
    font-size: 0.9rem;
    box-shadow: 0 5px 30px rgba(0, 255, 136, 0.4);
    transform: translateX(400px);
    transition: transform 0.3s ease;
    z-index: 1000;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.toast.show {
    transform: translateX(0);
}

footer {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

@media (max-width: 768px) {
    .main-section {
        padding: 20px;
    }

    .bulk-section {
        grid-template-columns: 1fr;
    }

    .action-buttons {
        grid-template-columns: 1fr;
    }
}