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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 50%, #cbd5e1 100%);
    color: #1e293b;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.hero {
    text-align: center;
    padding: 60px 0;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    border-radius: 24px;
    margin: 2rem 0;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 20%, rgba(59, 130, 246, 0.15) 0%, transparent 25%),
        radial-gradient(circle at 80% 80%, rgba(139, 92, 246, 0.15) 0%, transparent 25%),
        radial-gradient(circle at 40% 60%, rgba(245, 158, 11, 0.1) 0%, transparent 30%),
        radial-gradient(circle at 60% 40%, rgba(59, 130, 246, 0.08) 0%, transparent 35%),
        radial-gradient(circle at 90% 20%, rgba(139, 92, 246, 0.08) 0%, transparent 30%);
    pointer-events: none;
}

.hero::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        url("data:image/svg+xml,%3Csvg width='100' height='100' viewBox='0 0 100 100' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%233b82f6' fill-opacity='0.03'%3E%3Cpath d='M11 18c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm48 25c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm-43-7c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm63 31c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM34 90c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm56-76c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM12 86c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm28-65c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm23 11c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm6 21c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm-41 5c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4zm30 0c2.21 0 4-1.79 4-4s-1.79-4-4-4-4 1.79-4 4 1.79 4 4 4z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E"),
        url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%238b5cf6' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    background-size: 100px 100px, 60px 60px;
    background-position: 0 0, 30px 30px;
    pointer-events: none;
    animation: float 20s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-10px) rotate(1deg); }
}

.logo {
    font-size: 4rem;
    font-weight: 800;
    background: linear-gradient(45deg, #22d3ee, #8b5cf6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1rem;
    position: relative;
    z-index: 1;
}

.subtitle {
    font-size: 1.2rem;
    color: #64748b;
    margin-bottom: 1rem;
    position: relative;
    z-index: 1;
}

.description {
    font-size: 0.9rem;
    color: #94a3b8;
    margin-bottom: 2rem;
    position: relative;
    z-index: 1;
}

.btn-group {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 2rem;
    position: relative;
    z-index: 1;
}

.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-primary {
    background: linear-gradient(45deg, #3b82f6, #1d4ed8);
    color: white;
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.8);
    color: #475569;
    border: 1px solid rgba(148, 163, 184, 0.3);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.btn-primary:hover {
    box-shadow: 0 8px 20px rgba(59, 130, 246, 0.4);
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    margin: 3rem 0;
}

.card {
    background: rgba(255, 255, 255, 0.7);
    border: 1px solid rgba(148, 163, 184, 0.2);
    border-radius: 16px;
    padding: 1.5rem;
    backdrop-filter: none;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 1rem;
}

.icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(45deg, #3b82f6, #8b5cf6);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: white;
}

.card-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: #1e293b;
}

.card-content {
    color: #64748b;
}

.demo-section {
    background: rgba(255, 255, 255, 0.8);
    border: 1px solid rgba(148, 163, 184, 0.2);
    border-radius: 16px;
    padding: 2rem;
    margin: 3rem 0;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.demo-title {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 2rem;
    color: #1e293b;
}

.demo-grid {
    display: grid;
    grid-template-columns: 400px 1fr;
    gap: 2rem;
}

@media (max-width: 1024px) {
    .feature-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    @media (max-width: 768px) {
        .feature-grid {
            grid-template-columns: 1fr;
        }
    }    .demo-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

.controls {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.control-label {
    font-size: 0.9rem;
    color: #475569;
    font-weight: 500;
}

.control-input {
    background: rgba(255, 255, 255, 0.9);
    border: 1px solid rgba(148, 163, 184, 0.3);
    border-radius: 8px;
    padding: 8px 12px;
    color: #1e293b;
    font-size: 0.9rem;
}

.control-input:focus {
    outline: none;
    border-color: #3b82f6;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: rgba(148, 163, 184, 0.3);
    outline: none;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: linear-gradient(45deg, #3b82f6, #8b5cf6);
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(59, 130, 246, 0.3);
}

.slider::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: linear-gradient(45deg, #3b82f6, #8b5cf6);
    cursor: pointer;
    border: none;
    box-shadow: 0 2px 8px rgba(59, 130, 246, 0.3);
}

.brain-container {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.brain-image-container {
    flex: 1;
    background: rgba(248, 250, 252, 0.8);
    border-radius: 16px;
    border: 1px solid rgba(148, 163, 184, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 400px;
    position: relative;
    overflow: hidden;
    box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.05);
}

.brain-placeholder {
    text-align: center;
    color: #94a3b8;
}

.brain-placeholder .icon {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.6;
}

.brain-image {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: 16px;
}

.brain-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(45deg, 
        rgba(59, 130, 246, 0.1) 0%, 
        rgba(139, 92, 246, 0.1) 50%, 
        rgba(245, 158, 11, 0.1) 100%);
    border-radius: 16px;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.brain-image-container.loading .brain-overlay {
    opacity: 1;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0.1; }
    50% { opacity: 0.3; }
}

.play-controls {
    display: flex;
    gap: 12px;
    margin-top: 1rem;
}

.correlation-display {
    background: linear-gradient(45deg, rgba(59, 130, 246, 0.1), rgba(139, 92, 246, 0.1));
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: 8px;
    padding: 12px;
    margin-top: 1rem;
    color: #1e293b;
}

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

.explainer-card {
    background: rgba(248, 250, 252, 0.8);
    border: 1px solid rgba(148, 163, 184, 0.2);
    border-radius: 16px;
    padding: 1rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.explainer-title {
    font-weight: 600;
    margin-bottom: 8px;
    color: #3b82f6;
}

.datasets-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.dataset-item, .finding-item {
    background: rgba(248, 250, 252, 0.8);
    border: 1px solid rgba(148, 163, 184, 0.2);
    border-radius: 8px;
    padding: 1rem;
    margin-bottom: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    color: #475569;
}

.footer {
    text-align: center;
    padding: 3rem 0;
    color: #94a3b8;
    border-top: 1px solid rgba(148, 163, 184, 0.2);
    margin-top: 4rem;
}

.value-display {
    font-size: 0.8rem;
    color: #64748b;
    margin-top: 4px;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid rgba(148, 163, 184, 0.2);
    border-top: 3px solid #3b82f6;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto;
}

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