:root {
    --brand-navy: #0f1c35;
    --brand-gray-light: #f3f4f6;
    --brand-gray-text: #4b5563;
    --brand-accent: #ffffff;
}

body {
    font-family: 'Inter', sans-serif;
    margin: 0;
    padding: 0;
    color: #333;
}

/* Hero Background Wave Simulation */
.hero-section {
    background: linear-gradient(135deg, #e5e7eb 0%, #ffffff 50%, #e5e7eb 100%);
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('https://www.transparenttextures.com/patterns/cubes.png');
    opacity: 0.05;
}

.nav-link {
    transition: all 0.3s ease;
    position: relative;
}

.nav-link.active::after {
    content: "";
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: white;
}

.evolution-card {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    min-height: 280px;
}

.evolution-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

.leader-card {
    background: #f8f9fa;
    border-radius: 20px;
    border: 1px solid #e5e7eb;
    overflow: hidden;
}

.leader-img-placeholder {
    background: #e5e7eb;
    height: 200px;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.timeline-line {
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 2px;
    background: #d1d5db;
    z-index: 0;
}

footer {
    background-color: var(--brand-navy);
}