/* Container */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-pad);
}

/* Section */
.section {
    padding: var(--space-lg) 0;
}

.section-dark {
    background: var(--color-dark-bg);
    color: var(--color-dark-text);
}

/* Buttons */
.btn {
    display: inline-block;
    font-family: var(--font-body);
    font-weight: 600;
    text-align: center;
    border-radius: var(--radius-pill);
    cursor: pointer;
    transition: background var(--transition), color var(--transition);
    line-height: 1;
}

.btn-primary {
    background: var(--color-primary);
    color: var(--color-secondary);
    padding: 1rem 2.5rem;
    font-size: 1rem;
}

.btn-primary:hover {
    background: var(--color-primary-dark);
    color: var(--color-secondary);
}

.btn-secondary {
    background: transparent;
    color: var(--color-primary);
    padding: 1rem 2.5rem;
    font-size: 1rem;
    border: 1px solid var(--color-primary);
}

.btn-secondary:hover {
    background: var(--color-primary);
    color: var(--color-secondary);
}

.btn-sm {
    padding: 0.75rem 1.5rem;
    font-size: 0.875rem;
}

.btn-lg {
    padding: 1.25rem 3rem;
    font-size: 1.125rem;
}

/* Cards */
.card {
    background: white;
    padding: var(--space-md);
    border-radius: var(--radius-sm);
}

/* Grid */
.grid {
    display: grid;
    gap: var(--space-md);
}

.grid-2 {
    grid-template-columns: 1fr;
}

.grid-3 {
    grid-template-columns: 1fr;
}

.grid-4 {
    grid-template-columns: 1fr;
}

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

    .grid-3 {
        grid-template-columns: repeat(3, 1fr);
    }

    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .grid-4 {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* Flex */
.flex {
    display: flex;
}

.flex-col {
    flex-direction: column;
}

.items-center {
    align-items: center;
}

.justify-between {
    justify-content: space-between;
}

.gap-sm {
    gap: var(--space-sm);
}

.gap-md {
    gap: var(--space-md);
}

/* Text utilities */
.text-center {
    text-align: center;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* Uppercase tracking */
.label {
    display: block;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--color-primary);
    margin-bottom: var(--space-sm);
}

/* Paper grain texture overlay */
body::after {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 9999;
    opacity: 0.025;
    mix-blend-mode: multiply;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
}