:root {
    --primary: #4361ee;
    --primary-dark: #3a0ca3;
    --secondary: #f72585;
    --success: #4cc9f0;
    --warning: #f8961e;
    --danger: #ef233c;
    --light: #f8f9fa;
    --dark: #212529;
    --gray: #6c757d;
    --light-gray: #e9ecef;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: #f8fafc;
    color: var(--dark);
    line-height: 1.6;
    overflow-x: hidden;
}

.vdp-container {
    position: relative;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Background Shapes */
.bg-shapes {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

.shape-1, .shape-2, .shape-3 {
    position: absolute;
    border-radius: 50%;
    filter: blur(60px);
    opacity: 0.15;
}

.shape-1 {
    width: 600px;
    height: 600px;
    background: var(--primary);
    top: -200px;
    left: -200px;
}

.shape-2 {
    width: 400px;
    height: 400px;
    background: var(--secondary);
    bottom: -100px;
    right: -100px;
}

.shape-3 {
    width: 300px;
    height: 300px;
    background: var(--success);
    top: 50%;
    right: 10%;
}

/* Hero Section */
.vdp-hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 80px 0;
    position: relative;
}

.logo-container {
    margin-bottom: 40px;
    opacity: 0;
}

.logo {
    height: 80px;
    width: auto;
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.1));
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 20px;
    background: linear-gradient(90deg, var(--primary), var(--primary-dark));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    opacity: 0;
    transform: translateY(20px);
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--gray);
    margin-bottom: 40px;
    max-width: 700px;
    opacity: 0;
    transform: translateY(20px);
}

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    opacity: 0;
}

.mouse {
    width: 25px;
    height: 40px;
    border: 2px solid var(--primary);
    border-radius: 15px;
    position: relative;
}

.mouse::before {
    content: '';
    position: absolute;
    top: 5px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: var(--primary);
    border-radius: 2px;
    animation: scroll 2s infinite;
}

@keyframes scroll {
    0% { top: 5px; opacity: 1; }
    100% { top: 20px; opacity: 0; }
}

/* Section Styles */
section {
    padding: 80px 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
    opacity: 0;
    transform: translateY(20px);
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--primary-dark);
}

.section-header p {
    font-size: 1.1rem;
    color: var(--gray);
    max-width: 700px;
    margin: 0 auto;
}

/* Scope Cards */
.scope-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 30px;
    margin-bottom: 60px;
}

.scope-card {
    background: white;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    opacity: 0;
    transform: translateY(20px);
}

.scope-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
}

.card-header {
    padding: 25px;
    display: flex;
    align-items: center;
    gap: 15px;
    color: white;
}

.card-header i {
    font-size: 1.8rem;
}

.card-header h3 {
    font-size: 1.5rem;
    font-weight: 600;
}

.in-scope .card-header {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
}

.out-scope .card-header {
    background: linear-gradient(135deg, var(--secondary), #b5179e);
}

.scope-list {
    list-style: none;
    padding: 0;
}

.scope-list li {
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 20px;
    border-bottom: 1px solid var(--light-gray);
    transition: background 0.3s ease;
}

.scope-list li:last-child {
    border-bottom: none;
}

.scope-list li:hover {
    background: rgba(0, 0, 0, 0.02);
}

.scope-list i {
    font-size: 1.5rem;
    color: var(--primary);
    width: 40px;
    height: 40px;
    background: rgba(67, 97, 238, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.out-scope .scope-list i {
    color: var(--secondary);
    background: rgba(248, 37, 133, 0.1);
}

.scope-list h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 5px;
    color: var(--dark);
}

.scope-list p {
    color: var(--gray);
    font-size: 0.95rem;
}

/* Process Steps */
.process-steps {
    max-width: 800px;
    margin: 0 auto;
    display: grid;
    gap: 30px;
}

.process-step {
    display: flex;
    gap: 25px;
    align-items: flex-start;
    opacity: 0;
    transform: translateX(-20px);
}

.process-step:nth-child(even) {
    transform: translateX(20px);
}

.step-number {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--success), #4895ef);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    font-weight: 700;
    flex-shrink: 0;
}

.step-content {
    padding-top: 5px;
}

.step-content h3 {
    font-size: 1.3rem;
    font-weight: 600;
    margin-bottom: 10px;
    color: var(--primary-dark);
}

.step-content p {
    color: var(--gray);
    font-size: 1rem;
}

.highlight-email {
    color: var(--primary);
    font-weight: 600;
    cursor: pointer;
    position: relative;
}

.highlight-email::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width 0.3s ease;
}

.highlight-email:hover::after {
    width: 100%;
}

/* Hall of Fame */
.researchers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.researcher-card {
    background: white;
    border-radius: 12px;
    padding: 25px;
    display: flex;
    gap: 20px;
    align-items: center;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    opacity: 0;
    transform: translateY(20px);
}

.researcher-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.researcher-avatar {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    overflow: hidden;
    border: 3px solid var(--light-gray);
    transition: border-color 0.3s ease;
}

.researcher-card:hover .researcher-avatar {
    border-color: var(--primary);
}

.researcher-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.researcher-details {
    flex: 1;
}

.researcher-details h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 5px;
}

.finding {
    color: var(--gray);
    font-size: 0.95rem;
    margin-bottom: 10px;
}

.meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.date {
    font-size: 0.85rem;
    color: var(--gray);
}

.profile-link {
    color: var(--primary);
    font-size: 1.1rem;
    transition: color 0.3s ease;
}

.profile-link:hover {
    color: var(--primary-dark);
}

/* Footer */
.vdp-footer {
    text-align: center;
    padding: 40px 0;
    color: var(--gray);
    font-size: 0.95rem;
}

.vdp-footer p:first-child {
    margin-bottom: 10px;
    font-weight: 500;
}

/* Responsive */
@media (max-width: 992px) {
    .hero-title {
        font-size: 3rem;
    }
    
    .scope-cards {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.2rem;
    }
    
    .section-header h2 {
        font-size: 2rem;
    }
    
    .process-step {
        flex-direction: column;
        gap: 15px;
    }
    
    .step-number {
        margin-bottom: 5px;
    }
}

@media (max-width: 576px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .logo {
        height: 60px;
    }
    
    .section-header h2 {
        font-size: 1.8rem;
    }
    
    .card-header {
        padding: 20px;
    }
    
    .scope-list li {
        padding: 15px;
        gap: 15px;
    }
    
    .researcher-card {
        flex-direction: column;
        text-align: center;
    }
    
    .meta {
        justify-content: center;
        gap: 15px;
    }
}