:root {
    --brand-dark: #0f051a;
    --brand-deep-purple: #1a103c;
    --brand-purple: #3c1053;
    --brand-accent: #8a2be2;
    --brand-light: #e6e6fa;
    --brand-gray: #a0aec0;
    --font-sans: 'Inter', sans-serif;
}

body {
    background-color: var(--brand-dark);
    background-image: linear-gradient(160deg, var(--brand-deep-purple) 0%, var(--brand-dark) 100%);
    color: var(--brand-light);
}

#main-header {
    background-color: rgba(15, 5, 26, 0.7);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.nav-link.active, .nav-link-mobile.active {
    color: white;
    font-weight: 600;
    position: relative;
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 24px;
    height: 2px;
    background-color: var(--brand-accent);
    border-radius: 1px;
}

.nav-link-mobile {
    color: var(--brand-light);
    transition: background-color 0.3s, color 0.3s;
}

.nav-link-mobile:hover {
    background-color: rgba(255, 255, 255, 0.1);
    color: white;
}

.nav-link-mobile.active {
    background-color: var(--brand-accent);
    color: white;
}

.card {
    background-color: rgba(26, 16, 60, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    border-radius: 1rem;
    transition: transform 0.3s ease-in-out, box-shadow 0.3s ease-in-out;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3), 0 0 20px var(--brand-accent-translucent);
    --brand-accent-translucent: rgba(138, 43, 226, 0.2);
}

.tag {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    margin: 0.25rem;
    font-size: 0.75rem;
    font-weight: 500;
    line-height: 1.25;
    background-color: rgba(138, 43, 226, 0.2);
    color: var(--brand-light);
    border: 1px solid rgba(138, 43, 226, 0.5);
    border-radius: 9999px;
    cursor: default;
}

.page-title {
    font-size: 2.5rem;
    font-weight: 700;
    letter-spacing: -0.025em;
    background: linear-gradient(90deg, var(--brand-light), #c0bdf0);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 2rem;
}

.section-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: white;
    border-left: 3px solid var(--brand-accent);
    padding-left: 1rem;
    margin-bottom: 1.5rem;
}

.content-wrapper {
    will-change: transform, opacity;
}

#main-header.scrolled {
    background-color: var(--brand-dark);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}