/* ============================================
   A11y Paradise — Base Stylesheet
   Responsive, dark mode, high contrast support
   ============================================ */

/* --- Custom Properties --- */

:root {
    /* Light mode (default) */
    --color-text: #1a1a1a;
    --color-text-secondary: #444;
    --color-bg: #fff;
    --color-bg-header: #1a3a5c;
    --color-header-text: #fff;
    --color-link: #0055a5;
    --color-link-visited: #6b3fa0;
    --color-link-header: #c8ddf0;
    --color-link-header-hover: #fff;
    --color-focus: #0055a5;
    --color-border: #ccc;
    --color-bg-footer: #f5f5f5;
    --color-footer-text: #444;
    --color-footer-link: #0055a5;
    --color-nav-hover-bg: #2a4f7a;
    --color-header-border: #5a86b0;  /* 3.8:1 vs body, 3.0:1 vs header */
}

@media (prefers-color-scheme: dark) {
    :root {
        --color-text: #e0e0e0;
        --color-text-secondary: #b0b0b0;
        --color-bg: #121212;
        --color-bg-header: #0d1b2a;
        --color-header-text: #e0e0e0;
        --color-link: #6cb4f0;
        --color-link-visited: #c0a0e8;
        --color-link-header: #6cb4f0;
        --color-link-header-hover: #fff;
        --color-focus: #6cb4f0;
        --color-border: #444;
        --color-bg-footer: #1a1a1a;
        --color-footer-text: #b0b0b0;
        --color-footer-link: #6cb4f0;
        --color-nav-hover-bg: #1a3050;
        --color-header-border: #4a7aaa;  /* 4.2:1 vs body, 3.9:1 vs header */
    }
}

@media (prefers-contrast: more) {
    :root {
        --color-text: #000;
        --color-text-secondary: #000;
        --color-bg: #fff;
        --color-bg-header: #000;
        --color-header-text: #fff;
        --color-link: #0000cc;
        --color-link-visited: #6600aa;
        --color-link-header: #ffff00;
        --color-link-header-hover: #ffff00;
        --color-focus: #0000cc;
        --color-border: #000;
        --color-bg-footer: #fff;
        --color-footer-text: #000;
        --color-footer-link: #0000cc;
        --color-nav-hover-bg: #333;
        --color-header-border: #000;
    }
}

@media (prefers-contrast: more) and (prefers-color-scheme: dark) {
    :root {
        --color-text: #fff;
        --color-text-secondary: #fff;
        --color-bg: #000;
        --color-bg-header: #000;
        --color-header-text: #fff;
        --color-link: #ffff00;
        --color-link-visited: #ff99ff;
        --color-link-header: #ffff00;
        --color-link-header-hover: #fff;
        --color-focus: #ffff00;
        --color-border: #fff;
        --color-bg-footer: #000;
        --color-footer-text: #fff;
        --color-footer-link: #ffff00;
        --color-nav-hover-bg: #333;
        --color-header-border: #fff;
    }
}

/* --- Reset & Base --- */

*, *::before, *::after {
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, sans-serif;
    font-size: 1rem;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    color: var(--color-text);
    background: var(--color-bg);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* --- Skip Link --- */

.skip-link {
    position: absolute;
    left: -9999px;
    top: 0;
    padding: 0.75rem 1.5rem;
    background: var(--color-focus);
    color: #fff;
    font-weight: bold;
    text-decoration: none;
    z-index: 1000;
}

.skip-link:focus {
    left: 0;
    outline: 3px solid var(--color-focus);
    outline-offset: 2px;
}

@media (prefers-contrast: more) {
    .skip-link {
        background: #000;
        color: #ffff00;
        border: 3px solid #ffff00;
    }
}

/* --- Header --- */

.site-header {
    background: var(--color-bg-header);
    color: var(--color-header-text);
    padding: 1.5rem 2rem 0;
}

.site-header-inner {
    max-width: 60rem;
    margin: 0 auto;
}

.site-title {
    font-size: 1.75rem;
    font-weight: bold;
    margin: 0 0 0.25rem;
}

.site-title a {
    color: var(--color-header-text);
    text-decoration: none;
}

.site-title a:hover,
.site-title a:focus {
    text-decoration: underline;
}

.tagline {
    font-size: 1rem;
    margin: 0 0 1rem;
    color: var(--color-link-header);
}

/* --- Navigation --- */

.site-nav {
    background: var(--color-bg-header);
    border-bottom: 3px solid var(--color-header-border);
}

.site-nav-inner {
    max-width: 60rem;
    margin: 0 auto;
}

.site-nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 0;
}

.site-nav li {
    margin: 0;
}

.site-nav a {
    display: block;
    padding: 0.6rem 1.25rem;
    color: var(--color-link-header);
    text-decoration: none;
    border-bottom: 3px solid transparent;
}

.site-nav a:hover {
    background: var(--color-nav-hover-bg);
    color: var(--color-link-header-hover);
}

.site-nav a:focus {
    outline: 3px solid var(--color-focus);
    outline-offset: -3px;
}

.site-nav a[aria-current="page"] {
    border-bottom-color: var(--color-link-header);
    font-weight: bold;
}

/* --- Main Content --- */

.site-main {
    max-width: 60rem;
    margin: 0 auto;
    padding: 2rem;
    width: 100%;
    flex: 1;
}

/* --- Links --- */

a {
    color: var(--color-link);
}

a:visited {
    color: var(--color-link-visited);
}

a:hover {
    text-decoration-thickness: 2px;
}

a:focus {
    outline: 3px solid var(--color-focus);
    outline-offset: 2px;
}

/* --- Headings --- */

h1, h2, h3, h4 {
    line-height: 1.3;
}

h2 {
    margin-top: 2rem;
    border-bottom: 1px solid var(--color-border);
    padding-bottom: 0.3rem;
}

/* --- Footer --- */

.site-footer {
    background: var(--color-bg-footer);
    color: var(--color-footer-text);
    border-top: 1px solid var(--color-border);
    padding: 1.5rem 2rem;
    margin-top: auto;
}

.site-footer-inner {
    max-width: 60rem;
    margin: 0 auto;
    font-size: 0.875rem;
}

.site-footer a {
    color: var(--color-footer-link);
}

.site-footer p {
    margin: 0.25rem 0;
}

/* --- Responsive --- */

@media (max-width: 40rem) {
    .site-header {
        padding: 1rem 1rem 0;
    }

    .site-title {
        font-size: 1.4rem;
    }

    .site-nav a {
        padding: 0.5rem 0.75rem;
        font-size: 0.95rem;
    }

    .site-main {
        padding: 1.25rem 1rem;
    }

    .site-footer {
        padding: 1rem;
    }

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

    .search-row input[type="search"] {
        min-width: 0;
    }

    .review-details dt,
    .review-details dd {
        padding: 0.4rem 0.75rem;
    }
}

/* --- Visually Hidden (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: 0;
}

/* --- Search Forms --- */

.search-form {
    margin: 1.5rem 0;
    padding: 1.25rem;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    background: var(--color-bg);
}

.search-row {
    display: flex;
    gap: 0.5rem;
}

.search-row input[type="search"] {
    flex: 1;
    min-width: 15rem;
    padding: 0.5rem 0.75rem;
    font-size: 1rem;
    border: 2px solid var(--color-border);
    border-radius: 4px;
    color: var(--color-text);
    background: var(--color-bg);
}

.search-row input[type="search"]:focus {
    outline: 3px solid var(--color-focus);
    outline-offset: 1px;
    border-color: var(--color-focus);
}

.search-row button {
    padding: 0.5rem 1.25rem;
    font-size: 1rem;
    font-weight: bold;
    border: 2px solid var(--color-link);
    border-radius: 4px;
    background: var(--color-link);
    color: #fff;
    cursor: pointer;
}

.search-row button:hover {
    opacity: 0.9;
}

.search-row button:focus {
    outline: 3px solid var(--color-focus);
    outline-offset: 2px;
}

.search-hint {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    margin: 0.4rem 0 0;
}

.filter-row {
    margin-top: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.filter-row select {
    padding: 0.4rem 0.5rem;
    font-size: 0.95rem;
    border: 2px solid var(--color-border);
    border-radius: 4px;
    color: var(--color-text);
    background: var(--color-bg);
}

.filter-row select:focus {
    outline: 3px solid var(--color-focus);
    outline-offset: 1px;
}

.results-count {
    font-weight: bold;
    margin: 1rem 0 0.5rem;
}

/* --- Tag List --- */

.tag-list {
    list-style: none;
    padding: 0;
    margin: 0.5rem 0 0;
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
}

.tag-list li {
    margin: 0;
}

.tag-list a {
    display: inline-block;
    padding: 0.15rem 0.6rem;
    font-size: 0.8rem;
    border: 1px solid var(--color-border);
    border-radius: 3px;
    text-decoration: none;
    color: var(--color-link);
}

.tag-list a:hover {
    background: var(--color-link);
    color: #fff;
    border-color: var(--color-link);
}

.tag-list a:focus {
    outline: 3px solid var(--color-focus);
    outline-offset: 1px;
}

/* --- Breadcrumb --- */

.breadcrumb ol {
    list-style: none;
    padding: 0;
    margin: 0 0 1rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0;
    font-size: 0.9rem;
}

.breadcrumb li:not(:last-child)::after {
    content: " / ";
    margin: 0 0.4rem;
    color: var(--color-text-secondary);
}

/* --- Glossary List --- */

.glossary-list {
    margin: 1.5rem 0;
}

.glossary-entry {
    padding: 1rem 0;
    border-bottom: 1px solid var(--color-border);
}

.glossary-entry dt {
    font-size: 1.1rem;
    font-weight: bold;
}

.glossary-entry .aka {
    font-weight: normal;
    font-size: 0.9rem;
    color: var(--color-text-secondary);
}

.glossary-entry dd {
    margin: 0.3rem 0 0;
}

.aka-line {
    margin-top: 0.25rem;
    color: var(--color-text-secondary);
}

.term-definition {
    margin: 1rem 0;
    line-height: 1.7;
}

.term-meta {
    margin: 1.5rem 0;
}

.term-meta h3 {
    font-size: 1rem;
    margin: 0 0 0.3rem;
}

/* --- Review List --- */

.review-list {
    list-style: none;
    padding: 0;
    margin: 1.5rem 0;
}

.review-card {
    padding: 1rem 0;
    border-bottom: 1px solid var(--color-border);
}

.review-card h3 {
    margin: 0 0 0.3rem;
    font-size: 1.1rem;
}

.review-meta {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    margin: 0 0 0.5rem;
}

/* --- Article Content --- */

.article-content {
    line-height: 1.7;
    max-width: 50rem;
}

.article-content h2 {
    margin: 2rem 0 0.75rem;
    font-size: 1.4rem;
}

.article-content h3 {
    margin: 1.5rem 0 0.5rem;
    font-size: 1.2rem;
}

.article-content p {
    margin: 0 0 1rem;
}

.article-content ul,
.article-content ol {
    margin: 0 0 1rem;
    padding-left: 1.5rem;
}

.article-content li {
    margin: 0 0 0.4rem;
}

.article-content hr {
    margin: 2rem 0;
    border: none;
    border-top: 1px solid var(--color-border);
}

/* --- Review Detail --- */

.review-details {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 0;
    margin: 1rem 0;
    border: 1px solid var(--color-border);
    border-radius: 4px;
}

.review-details dt {
    font-weight: bold;
    padding: 0.5rem 1rem;
    background: var(--color-bg-footer);
    border-bottom: 1px solid var(--color-border);
}

.review-details dd {
    margin: 0;
    padding: 0.5rem 1rem;
    border-bottom: 1px solid var(--color-border);
}

.review-details dt:last-of-type,
.review-details dd:last-of-type {
    border-bottom: none;
}

/* --- Flash Messages --- */

.flash-messages {
    margin: 0 0 1.5rem;
}

.flash {
    padding: 0.75rem 1rem;
    border-radius: 4px;
    border: 2px solid var(--color-border);
    margin: 0 0 0.5rem;
}

.flash-success {
    border-color: #2e7d32;
    background: #e8f5e9;
    color: #1b5e20;
}

.flash-error {
    border-color: #c62828;
    background: #ffebee;
    color: #b71c1c;
}

@media (prefers-color-scheme: dark) {
    .flash-success {
        background: #1b3a1b;
        color: #a5d6a7;
        border-color: #388e3c;
    }
    .flash-error {
        background: #3e1111;
        color: #ef9a9a;
        border-color: #e53935;
    }
}

@media (prefers-contrast: more) {
    .flash-success,
    .flash-error {
        background: var(--color-bg);
        color: var(--color-text);
        border-color: var(--color-text);
        border-width: 3px;
    }
}

@media (prefers-contrast: more) and (prefers-color-scheme: dark) {
    .flash-success,
    .flash-error {
        background: var(--color-bg);
        color: var(--color-text);
        border-color: var(--color-text);
        border-width: 3px;
    }
}

/* --- Admin Nav --- */

.admin-nav {
    margin: 0 0 1.5rem;
    padding: 0.75rem 1rem;
    background: var(--color-bg-footer);
    border: 1px solid var(--color-border);
    border-radius: 4px;
}

.admin-nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem 1rem;
}

.admin-nav a {
    text-decoration: none;
}

.admin-nav a[aria-current="page"] {
    font-weight: bold;
}

/* --- Admin Forms --- */

.admin-form {
    max-width: 40rem;
}

.form-group {
    margin: 0 0 1.25rem;
}

.form-group label {
    display: block;
    font-weight: bold;
    margin: 0 0 0.3rem;
}

.form-group input[type="text"],
.form-group input[type="password"],
.form-group input[type="number"],
.form-group textarea {
    width: 100%;
    padding: 0.5rem 0.75rem;
    font-size: 1rem;
    font-family: inherit;
    border: 2px solid var(--color-border);
    border-radius: 4px;
    color: var(--color-text);
    background: var(--color-bg);
}

.form-group input[type="number"] {
    max-width: 8rem;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: 3px solid var(--color-focus);
    outline-offset: 1px;
    border-color: var(--color-focus);
}

.form-group input[aria-invalid="true"],
.form-group textarea[aria-invalid="true"] {
    border-color: #c62828;
}

.form-hint {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    margin: 0.3rem 0 0;
}

.form-error {
    color: #c62828;
    font-size: 0.9rem;
    margin: 0.3rem 0 0;
}

.form-errors {
    padding: 1rem;
    border: 2px solid #c62828;
    border-radius: 4px;
    margin: 0 0 1.5rem;
    background: #ffebee;
    color: #b71c1c;
}

@media (prefers-color-scheme: dark) {
    .form-errors {
        background: #3e1111;
        color: #ef9a9a;
        border-color: #e53935;
    }
    .form-error {
        color: #ef9a9a;
    }
    .form-group input[aria-invalid="true"],
    .form-group textarea[aria-invalid="true"] {
        border-color: #e53935;
    }
}

@media (prefers-contrast: more) {
    .form-errors {
        background: var(--color-bg);
        color: var(--color-text);
        border: 3px solid var(--color-text);
    }
    .form-error {
        color: var(--color-text);
    }
}

.form-actions {
    display: flex;
    gap: 0.75rem;
    margin: 1.5rem 0;
}

/* --- Buttons --- */

.btn {
    display: inline-block;
    padding: 0.5rem 1.25rem;
    font-size: 1rem;
    font-weight: bold;
    border: 2px solid transparent;
    border-radius: 4px;
    cursor: pointer;
    text-decoration: none;
}

.btn:focus {
    outline: 3px solid var(--color-focus);
    outline-offset: 2px;
}

.btn-primary {
    background: var(--color-link);
    color: #fff;
    border-color: var(--color-link);
}

.btn-secondary {
    background: transparent;
    color: var(--color-link);
    border-color: var(--color-border);
}

.btn-danger {
    background: #c62828;
    color: #fff;
    border-color: #c62828;
}

@media (prefers-color-scheme: dark) {
    .btn-danger {
        background: #e53935;
        border-color: #e53935;
    }
}

@media (prefers-contrast: more) {
    .btn-primary,
    .btn-danger {
        border: 3px solid var(--color-text);
    }
}

/* --- Admin Table --- */

.admin-table {
    width: 100%;
    border-collapse: collapse;
    margin: 1rem 0;
}

.admin-table th,
.admin-table td {
    text-align: left;
    padding: 0.5rem 0.75rem;
    border-bottom: 1px solid var(--color-border);
}

.admin-table th {
    background: var(--color-bg-footer);
    font-weight: bold;
}

.admin-table td a + a {
    margin-left: 0.75rem;
}

/* --- Pagination --- */

.pagination {
    list-style: none;
    padding: 0;
    margin: 2rem 0 1rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem;
    justify-content: center;
}

.pagination li {
    margin: 0;
}

.pagination a,
.pagination-current,
.pagination-disabled {
    display: inline-block;
    padding: 0.4rem 0.75rem;
    font-size: 0.95rem;
    border: 2px solid var(--color-border);
    border-radius: 4px;
    text-decoration: none;
    min-width: 2.5rem;
    text-align: center;
}

.pagination a {
    color: var(--color-link);
    background: var(--color-bg);
}

.pagination a:hover {
    background: var(--color-link);
    color: #fff;
    border-color: var(--color-link);
}

.pagination a:focus {
    outline: 3px solid var(--color-focus);
    outline-offset: 2px;
}

.pagination-current {
    background: var(--color-link);
    color: #fff;
    border-color: var(--color-link);
    font-weight: bold;
}

.pagination-disabled {
    color: var(--color-text-secondary);
    background: var(--color-bg-footer);
    border-color: var(--color-border);
}

.pagination-ellipsis {
    display: inline-block;
    padding: 0.4rem 0.5rem;
    color: var(--color-text-secondary);
}

@media (prefers-contrast: more) {
    .pagination a {
        border-width: 3px;
        border-color: var(--color-text);
    }

    .pagination-current {
        background: var(--color-text);
        color: var(--color-bg);
        border-color: var(--color-text);
    }

    .pagination-disabled {
        border-color: var(--color-text);
        border-width: 3px;
    }
}

@media (max-width: 40rem) {
    .pagination {
        gap: 0.2rem;
    }

    .pagination a,
    .pagination-current,
    .pagination-disabled {
        padding: 0.35rem 0.5rem;
        font-size: 0.9rem;
        min-width: 2rem;
    }
}