/**
 * FlexBase - Base Styles
 * Global styles applied to the entire site
 * Mobile-first approach
 */

/* ========================================
   Document Base
   ======================================== */

html {
    font-size: 100%; /* 16px default, respects user preferences */
}

body {
    font-family: var(--font-body);
    font-size: var(--text-base);
    font-weight: var(--font-normal);
    line-height: var(--leading-normal);
    color: var(--text-primary);
    background-color: var(--bg-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Offset for fixed header */
body {
    padding-top: var(--header-height);
}

/* ========================================
   Typography - Headings
   ======================================== */

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    font-weight: var(--font-bold);
    line-height: var(--leading-tight);
    color: var(--text-primary);
    letter-spacing: var(--tracking-tight);
}

/* Mobile sizes */
h1 {
    font-size: var(--text-3xl);
}

h2 {
    font-size: var(--text-2xl);
}

h3 {
    font-size: var(--text-xl);
}

h4 {
    font-size: var(--text-lg);
}

h5 {
    font-size: var(--text-base);
    font-weight: var(--font-semibold);
}

h6 {
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
}

/* Tablet (768px+) */
@media (min-width: 768px) {
    h1 {
        font-size: var(--text-4xl);
    }

    h2 {
        font-size: var(--text-3xl);
    }

    h3 {
        font-size: var(--text-2xl);
    }

    h4 {
        font-size: var(--text-xl);
    }
}

/* Desktop (1024px+) */
@media (min-width: 1024px) {
    h1 {
        font-size: var(--text-5xl);
    }

    h2 {
        font-size: var(--text-4xl);
    }

    h3 {
        font-size: var(--text-3xl);
    }
}

/* Large Desktop (1280px+) */
@media (min-width: 1280px) {
    h1 {
        font-size: var(--text-6xl);
    }
}

/* ========================================
   Typography - Body Text
   ======================================== */

p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-4);
}

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

.lead {
    font-size: var(--text-lg);
    line-height: var(--leading-relaxed);
    color: var(--text-secondary);
}

@media (min-width: 768px) {
    .lead {
        font-size: var(--text-xl);
    }
}

small,
.small {
    font-size: var(--text-sm);
}

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

/* ========================================
   Typography - Rich Text Content
   For content rendered from JSON/CMS
   ======================================== */

.rich-text p {
    margin-bottom: var(--spacing-4);
}

.rich-text strong,
.rich-text b {
    font-weight: var(--font-semibold);
    color: var(--text-primary);
}

.rich-text em,
.rich-text i {
    font-style: italic;
}

.rich-text u {
    text-decoration: underline;
    text-underline-offset: 2px;
}

.rich-text ul,
.rich-text ol {
    margin-bottom: var(--spacing-4);
    padding-left: var(--spacing-6);
}

.rich-text ul {
    list-style-type: disc;
}

.rich-text ol {
    list-style-type: decimal;
}

.rich-text li {
    margin-bottom: var(--spacing-2);
}

.rich-text li:last-child {
    margin-bottom: 0;
}

/* ========================================
   Links
   ======================================== */

a {
    color: var(--color-primary);
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-primary-dark);
}

/* Links within text content */
.rich-text a,
p a {
    text-decoration: underline;
    text-underline-offset: 2px;
}

.rich-text a:hover,
p a:hover {
    text-decoration: none;
}

/* ========================================
   Focus Styles (Accessibility)
   ======================================== */

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible,
[tabindex]:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* Remove focus outline for mouse users */
:focus:not(:focus-visible) {
    outline: none;
}

/* ========================================
   Selection
   ======================================== */

::selection {
    background-color: var(--color-primary);
    color: var(--color-primary-contrast);
}

/* ========================================
   Layout - Container
   ======================================== */

.container {
    width: 100%;
    max-width: var(--container-max);
    margin-left: auto;
    margin-right: auto;
    padding-left: var(--container-padding);
    padding-right: var(--container-padding);
}

.container--narrow {
    max-width: var(--container-3xl);
}

.container--wide {
    max-width: var(--container-7xl);
}

.container--full {
    max-width: none;
}

/* ========================================
   Layout - Sections
   ======================================== */

.section {
    padding-top: var(--section-padding-y);
    padding-bottom: var(--section-padding-y);
}

.section--sm {
    padding-top: var(--spacing-12);
    padding-bottom: var(--spacing-12);
}

@media (min-width: 768px) {
    .section--sm {
        padding-top: var(--spacing-16);
        padding-bottom: var(--spacing-16);
    }
}

.section--no-padding-top {
    padding-top: 0;
}

.section--no-padding-bottom {
    padding-bottom: 0;
}

/* Section backgrounds */
.section--gray {
    background-color: var(--bg-secondary);
}

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

.section--dark h1,
.section--dark h2,
.section--dark h3,
.section--dark h4,
.section--dark h5,
.section--dark h6 {
    color: var(--text-inverse);
}

.section--dark p {
    color: var(--color-gray-300);
}

.section--primary {
    background-color: var(--color-primary);
    color: var(--color-primary-contrast);
}

.section--primary h1,
.section--primary h2,
.section--primary h3,
.section--primary h4,
.section--primary h5,
.section--primary h6,
.section--primary p {
    color: var(--color-primary-contrast);
}

/* ========================================
   Layout - Section Header
   ======================================== */

.section__header {
    text-align: center;
    margin-bottom: var(--spacing-10);
    max-width: var(--container-3xl);
    margin-left: auto;
    margin-right: auto;
}

@media (min-width: 768px) {
    .section__header {
        margin-bottom: var(--spacing-12);
    }
}

@media (min-width: 1024px) {
    .section__header {
        margin-bottom: var(--spacing-16);
    }
}

.section__title {
    margin-bottom: var(--spacing-3);
}

@media (min-width: 768px) {
    .section__title {
        margin-bottom: var(--spacing-4);
    }
}

.section__subtitle {
    font-size: var(--text-base);
    color: var(--text-secondary);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    line-height: var(--leading-relaxed);
}

@media (min-width: 768px) {
    .section__subtitle {
        font-size: var(--text-lg);
    }
}

/* Dark section header */
.section--dark .section__subtitle,
.section--primary .section__subtitle {
    color: rgba(255, 255, 255, 0.8);
}

/* Left-aligned header variant */
.section__header--left {
    text-align: left;
    margin-left: 0;
}

.section__header--left .section__subtitle {
    margin-left: 0;
}

/* ========================================
   Images
   ======================================== */

img {
    max-width: 100%;
    height: auto;
}

img[loading="lazy"] {
    background-color: var(--bg-secondary);
}

.img-cover {
    object-fit: cover;
    width: 100%;
    height: 100%;
}

.img-contain {
    object-fit: contain;
}

/* ========================================
   Utility Classes - Display
   ======================================== */

.hidden {
    display: none !important;
}

.block {
    display: block;
}

.inline-block {
    display: inline-block;
}

.flex {
    display: flex;
}

.inline-flex {
    display: inline-flex;
}

.grid {
    display: grid;
}

/* ========================================
   Utility Classes - Flexbox
   ======================================== */

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

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

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

.items-start {
    align-items: flex-start;
}

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

.items-end {
    align-items: flex-end;
}

.justify-start {
    justify-content: flex-start;
}

.justify-center {
    justify-content: center;
}

.justify-end {
    justify-content: flex-end;
}

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

.gap-2 {
    gap: var(--spacing-2);
}

.gap-4 {
    gap: var(--spacing-4);
}

.gap-6 {
    gap: var(--spacing-6);
}

.gap-8 {
    gap: var(--spacing-8);
}

/* ========================================
   Utility Classes - Text Alignment
   ======================================== */

.text-left {
    text-align: left;
}

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

.text-right {
    text-align: right;
}

/* ========================================
   Utility Classes - Spacing
   ======================================== */

.mx-auto {
    margin-left: auto;
    margin-right: auto;
}

.mt-0 {
    margin-top: 0;
}
.mt-4 {
    margin-top: var(--spacing-4);
}
.mt-6 {
    margin-top: var(--spacing-6);
}
.mt-8 {
    margin-top: var(--spacing-8);
}

.mb-0 {
    margin-bottom: 0;
}
.mb-4 {
    margin-bottom: var(--spacing-4);
}
.mb-6 {
    margin-bottom: var(--spacing-6);
}
.mb-8 {
    margin-bottom: var(--spacing-8);
}

/* ========================================
   Utility Classes - Width
   ======================================== */

.w-full {
    width: 100%;
}

.max-w-none {
    max-width: none;
}

/* ========================================
   Accessibility - Screen Reader Only
   ======================================== */

.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;
}

.sr-only-focusable:focus,
.sr-only-focusable:active {
    position: static;
    width: auto;
    height: auto;
    padding: inherit;
    margin: inherit;
    overflow: visible;
    clip: auto;
    white-space: normal;
}

/* ========================================
   Skip Link (Accessibility)
   ======================================== */

.skip-link {
    position: fixed;
    top: 0;
    left: 0;
    z-index: var(--z-max);
    padding: var(--spacing-3) var(--spacing-4);
    background-color: var(--color-primary);
    color: var(--color-primary-contrast);
    font-weight: var(--font-medium);
    transform: translateY(-100%);
    transition: transform var(--transition-fast);
}

.skip-link:focus {
    transform: translateY(0);
    outline: none;
}