.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 0;
}

.grid-2 {
    display: grid;
}

@media (min-width: 768px) {
    .grid-2 {
        grid-template-columns: 1fr 1fr;
    }
}

.grid-3 {
    display: grid;
    gap: 1rem;
}

@media (min-width: 768px) {
    .grid-3 {
        grid-template-columns: repeat(3, 1fr);
    }
}

.section {
    padding: clamp(1.5rem, 2vw, 2rem) 0;
}

.section .container > h2 {
    margin-top: 0;
    margin-bottom: 0.65rem;
}

.section-intro {
    margin-top: 0;
    margin-bottom: 1.25rem;
    max-width: 72ch;
}

body {
    background: var(--color-bg);
    color: var(--color-text);
    transition: background .3s, color .3s;
    font-family: 'Roboto', sans-serif;
    position: relative;
}

.site-content {
    position: relative;
    z-index: 1;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.4rem;
    border-radius: var(--radius-sm);
    font-weight: 600;
    transition: var(--transition);
    cursor: pointer;
    text-decoration: none;
    
}

.btn:focus-visible {
    outline: 2px solid rgba(19, 102, 214, 0.9);
    outline-offset: 2px;
}

.btn-primary {
    background: var(--color-primary);
    color: white;
    padding: 0.75rem 1.4rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 1rem;
    font-weight: 600;
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: var(--surface-1);
    color: var(--color-text);
    border: 1px solid var(--border-color);
    padding: 0.75rem 1.4rem;
}

.btn-secondary:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-1px);
    background: var(--surface-3);
}

/* Cards */
.card {
    background: var(--surface-2);
    color: var(--color-text);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1rem;
    font-size: 1rem;
}

.card:hover {
    transform: none;
    box-shadow: var(--shadow-lg);
}

/* Surfaces */
.surface-1 { background: var(--surface-1); }
.surface-2 { background: var(--surface-2); }
.surface-3 { background: var(--surface-3); }

/* Typography */
.text-secondary {
    color: var(--color-text-secondary);
}

/* Scroll reveal */
.reveal {
    opacity: 0;
    transform: translate3d(0, 28px, 0);
    transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
    will-change: opacity, transform;
}

.reveal.is-visible {
    opacity: 1;
    transform: translate3d(0, 0, 0);
}

.reveal .reveal-child {
    opacity: 0;
    transform: translate3d(0, 16px, 0);
    transition: opacity 0.55s ease, transform 0.55s cubic-bezier(0.22, 1, 0.36, 1);
}

.reveal.is-visible .reveal-child {
    opacity: 1;
    transform: translate3d(0, 0, 0);
    transition-delay: var(--reveal-delay, 0ms);
}

@media (prefers-reduced-motion: reduce) {
    .reveal,
    .reveal.is-visible,
    .reveal .reveal-child,
    .reveal.is-visible .reveal-child {
        opacity: 1;
        transform: none;
        transition: none;
    }
}