/* Container */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* Sections */
.section {
    padding: var(--section-padding);
}

.section--light {
    background-color: var(--color-off-white);
}

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

.section--dark h2,
.section--dark h3,
.section--dark h4 {
    color: var(--color-white);
}

.section--teal {
    background-color: var(--color-teal);
    color: var(--color-white);
}

.section--teal h2,
.section--teal h3,
.section--teal h4 {
    color: var(--color-white);
}

.section--navy {
    background-color: var(--color-navy);
    color: var(--color-white);
}

.section--navy h2,
.section--navy h3,
.section--navy h4 {
    color: var(--color-white);
}

/* Section header */
.section__header {
    text-align: center;
    max-width: 720px;
    margin: 0 auto var(--space-12);
}

.section__header h2 {
    margin-bottom: var(--space-4);
}

.section__header p {
    color: var(--color-text-secondary);
    font-size: var(--text-lg);
}

.section--dark .section__header p,
.section--teal .section__header p,
.section--navy .section__header p {
    color: rgba(255, 255, 255, 0.8);
}

/* Grid system */
.grid {
    display: grid;
    gap: var(--space-8);
}

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

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

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

@media (min-width: 640px) {
    .grid--2 {
        grid-template-columns: repeat(2, 1fr);
    }

    .grid--3 {
        grid-template-columns: repeat(2, 1fr);
    }

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

@media (min-width: 1024px) {
    .grid--3 {
        grid-template-columns: repeat(3, 1fr);
    }

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

/* Flexbox utilities */
.flex {
    display: flex;
}

.flex--center {
    align-items: center;
    justify-content: center;
}

.flex--between {
    align-items: center;
    justify-content: space-between;
}

.flex--wrap {
    flex-wrap: wrap;
}

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

.flex--gap-4 {
    gap: var(--space-4);
}

.flex--gap-8 {
    gap: var(--space-8);
}

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

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: 0.875rem 2rem;
    font-family: var(--font-heading);
    font-size: var(--text-base);
    font-weight: 600;
    border-radius: 0.5rem;
    transition: all var(--transition-base);
    white-space: nowrap;
}

.btn--primary {
    background-color: var(--color-teal);
    color: var(--color-white);
}

.btn--primary:hover {
    background-color: var(--color-teal-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(21, 95, 130, 0.4);
}

.btn--secondary {
    background-color: transparent;
    color: var(--color-white);
    border: 2px solid var(--color-white);
}

.btn--secondary:hover {
    background-color: var(--color-white);
    color: var(--color-dark);
    transform: translateY(-2px);
}

.btn--outline {
    background-color: transparent;
    color: var(--color-teal);
    border: 2px solid var(--color-teal);
}

.btn--outline:hover {
    background-color: var(--color-teal);
    color: var(--color-white);
    transform: translateY(-2px);
}

.btn--sm {
    padding: 0.625rem 1.25rem;
    font-size: var(--text-sm);
}

.btn--lg {
    padding: 1rem 2.5rem;
    font-size: var(--text-lg);
}

/* Main content offset for sticky navbar */
main {
    min-height: 100vh;
}

/* Skip to content (accessibility) */
.skip-link {
    position: absolute;
    top: -100%;
    left: 0;
    z-index: 1000;
    padding: var(--space-4);
    background: var(--color-teal);
    color: var(--color-white);
    font-weight: 600;
}

.skip-link:focus {
    top: 0;
}