main {
    margin-top: 64px;
    margin-right: 0;
    padding: var(--space-2xl) var(--space-lg);
    min-height: calc(100vh - 64px);
    transition: margin-right var(--transition-base);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

section {
    margin-bottom: var(--space-2xl);
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.6s ease-out;
    padding: var(--space-xl) 0;
}

section.visible {
    opacity: 1;
    transform: translateY(0);
}

section:last-child {
    margin-bottom: 0;
}

.section-header {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-bottom: var(--space-xl);
    position: relative;
}

.section-number {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--accent-primary);
    font-weight: 400;
    font-family: 'Courier New', monospace;
}

.section-header .section-title {
    margin-bottom: 0;
    padding-bottom: 0;
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    font-weight: 500;
}

.section-header .section-title::after {
    display: none;
}

.section-title-underline {
    position: absolute;
    bottom: -8px;
    right: 0;
    width: 60px;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-primary), transparent);
    animation: expandLine 0.8s ease-out 0.3s both;
}

@keyframes expandLine {
    from {
        width: 0;
    }
    to {
        width: 60px;
    }
}