/* ==========================================================================
   Tennis Minimal Light - CSS Stylesheet
   A clean, minimalist template for tennis blogs
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Custom Properties (Variables)
   -------------------------------------------------------------------------- */
:root {
    /* Colors */
    --color-bg: #ffffff;
    --color-bg-alt: #fafafa;
    --color-text: #111111;
    --color-text-muted: #6b7280;
    --color-text-light: #9ca3af;
    --color-accent: #16a34a;
    --color-accent-hover: #15803d;
    --color-border: #e5e7eb;
    --color-border-light: #f3f4f6;

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;

    /* Spacing */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    --space-20: 5rem;
    --space-24: 6rem;

    /* Layout */
    --container-max: 1200px;
    --container-narrow: 720px;
    --header-height: 72px;

    /* Effects */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
}

/* --------------------------------------------------------------------------
   Reset & Base Styles
   -------------------------------------------------------------------------- */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-sans);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-fast);
}

button {
    font-family: inherit;
    font-size: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

ul, ol {
    list-style: none;
}

/* 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;
}

/* --------------------------------------------------------------------------
   Layout
   -------------------------------------------------------------------------- */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-6);
}

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

/* --------------------------------------------------------------------------
   Header
   -------------------------------------------------------------------------- */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background-color: var(--color-bg);
    border-bottom: 1px solid var(--color-border-light);
    height: var(--header-height);
}

.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.logo {
    font-size: var(--font-size-xl);
    font-weight: 700;
    letter-spacing: -0.02em;
}

.logo:hover {
    color: var(--color-accent);
}

.main-nav ul {
    display: flex;
    gap: var(--space-8);
}

.main-nav a {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
}

.main-nav a:hover,
.main-nav a.active {
    color: var(--color-text);
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    padding: var(--space-2);
}

.menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: var(--color-text);
    transition: transform var(--transition-base), opacity var(--transition-base);
}

.menu-toggle.active span:first-child {
    transform: rotate(45deg) translate(5px, 5px);
}

.menu-toggle.active span:last-child {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile Navigation */
@media (max-width: 768px) {
    .menu-toggle {
        display: flex;
    }

    .main-nav {
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        bottom: 0;
        background-color: var(--color-bg);
        padding: var(--space-8);
        transform: translateX(100%);
        transition: transform var(--transition-base);
    }

    .main-nav.active {
        transform: translateX(0);
    }

    .main-nav ul {
        flex-direction: column;
        gap: var(--space-6);
    }

    .main-nav a {
        font-size: var(--font-size-lg);
    }
}

/* --------------------------------------------------------------------------
   Hero / Featured Post
   -------------------------------------------------------------------------- */
.hero {
    padding: var(--space-16) 0;
    background-color: var(--color-bg-alt);
}

.featured-post {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-12);
    align-items: center;
}

.featured-content .label {
    display: inline-block;
    font-size: var(--font-size-xs);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-accent);
    margin-bottom: var(--space-4);
}

.featured-content h1 {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-4);
}

.featured-content h1 a:hover {
    color: var(--color-accent);
}

.featured-content .excerpt {
    font-size: var(--font-size-lg);
    color: var(--color-text-muted);
    margin-bottom: var(--space-6);
}

.featured-content .meta {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    margin-bottom: var(--space-6);
}

.meta .separator {
    color: var(--color-border);
}

.read-more {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-accent);
}

.read-more:hover {
    color: var(--color-accent-hover);
}

.featured-image {
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.featured-image img {
    width: 100%;
    height: 400px;
    object-fit: cover;
}

@media (max-width: 768px) {
    .hero {
        padding: var(--space-10) 0;
    }

    .featured-post {
        grid-template-columns: 1fr;
        gap: var(--space-8);
    }

    .featured-content h1 {
        font-size: var(--font-size-3xl);
    }

    .featured-image img {
        height: 280px;
    }
}

/* --------------------------------------------------------------------------
   Posts Section
   -------------------------------------------------------------------------- */
.posts-section {
    padding: var(--space-16) 0;
}

.section-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-10);
}

.posts-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-10);
}

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

@media (max-width: 992px) {
    .posts-grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .posts-section {
        padding: var(--space-10) 0;
    }

    .posts-grid,
    .posts-grid-3 {
        grid-template-columns: 1fr;
        gap: var(--space-8);
    }
}

/* --------------------------------------------------------------------------
   Post Card
   -------------------------------------------------------------------------- */
.post-card {
    display: flex;
    flex-direction: column;
}

.post-image {
    display: block;
    border-radius: var(--radius-md);
    overflow: hidden;
    margin-bottom: var(--space-4);
}

.post-image img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    transition: transform var(--transition-base);
}

.post-card:hover .post-image img {
    transform: scale(1.02);
}

.post-content h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: var(--space-2);
}

.post-content h3 a:hover {
    color: var(--color-accent);
}

.post-content .excerpt {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin-bottom: var(--space-3);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.post-content .meta {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
}

/* --------------------------------------------------------------------------
   Pagination
   -------------------------------------------------------------------------- */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-6);
    margin-top: var(--space-12);
    padding-top: var(--space-8);
    border-top: 1px solid var(--color-border-light);
}

.pagination-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text);
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-sm);
    transition: color var(--transition-fast), background-color var(--transition-fast);
}

.pagination-link:hover {
    color: var(--color-accent);
    background-color: var(--color-bg-alt);
}

.pagination-info {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
}

/* --------------------------------------------------------------------------
   Article Page
   -------------------------------------------------------------------------- */
.article-header {
    padding: var(--space-16) 0 var(--space-10);
    text-align: center;
}

.category-link {
    display: inline-block;
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-accent);
    margin-bottom: var(--space-4);
}

.category-link:hover {
    color: var(--color-accent-hover);
}

.article-header h1 {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-6);
}

.article-meta {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
}

@media (max-width: 768px) {
    .article-header {
        padding: var(--space-10) 0 var(--space-8);
    }

    .article-header h1 {
        font-size: var(--font-size-3xl);
    }
}

/* Article Cover Image */
.article-cover {
    margin-bottom: var(--space-10);
}

.article-cover img {
    width: 100%;
    max-height: 500px;
    object-fit: cover;
    border-radius: var(--radius-lg);
}

/* Article Content */
.article-content {
    padding-bottom: var(--space-12);
}

.article-content h2 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-top: var(--space-10);
    margin-bottom: var(--space-4);
}

.article-content h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-top: var(--space-8);
    margin-bottom: var(--space-3);
}

.article-content p {
    margin-bottom: var(--space-6);
}

.article-content a {
    color: var(--color-accent);
    text-decoration: underline;
    text-underline-offset: 2px;
}

.article-content a:hover {
    color: var(--color-accent-hover);
}

.article-content ul,
.article-content ol {
    margin-bottom: var(--space-6);
    padding-left: var(--space-6);
}

.article-content ul {
    list-style: disc;
}

.article-content ol {
    list-style: decimal;
}

.article-content li {
    margin-bottom: var(--space-2);
}

.article-content blockquote {
    border-left: 3px solid var(--color-accent);
    padding-left: var(--space-6);
    margin: var(--space-8) 0;
    font-style: italic;
    color: var(--color-text-muted);
}

.article-content pre {
    background-color: var(--color-bg-alt);
    padding: var(--space-6);
    border-radius: var(--radius-md);
    overflow-x: auto;
    margin-bottom: var(--space-6);
}

.article-content code {
    font-family: 'SF Mono', Monaco, 'Courier New', monospace;
    font-size: 0.9em;
}

.article-content img {
    border-radius: var(--radius-md);
    margin: var(--space-8) 0;
}

.article-content figure {
    margin: var(--space-8) 0;
}

.article-content figcaption {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    text-align: center;
    margin-top: var(--space-3);
}

/* Article Footer */
.article-footer {
    padding: var(--space-8) 0;
    border-top: 1px solid var(--color-border-light);
}

.tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    margin-bottom: var(--space-6);
}

.tag {
    display: inline-block;
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    padding: var(--space-1) var(--space-3);
    background-color: var(--color-bg-alt);
    border-radius: var(--radius-sm);
    transition: color var(--transition-fast), background-color var(--transition-fast);
}

.tag:hover {
    color: var(--color-accent);
    background-color: var(--color-border-light);
}

/* Share Buttons */
.share-buttons {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.share-label {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-muted);
}

.share-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    color: var(--color-text-muted);
    background-color: var(--color-bg-alt);
    border-radius: var(--radius-sm);
    transition: color var(--transition-fast), background-color var(--transition-fast);
}

.share-button:hover {
    color: var(--color-accent);
    background-color: var(--color-border-light);
}

/* Related Posts */
.related-posts {
    padding: var(--space-16) 0;
    background-color: var(--color-bg-alt);
}

/* --------------------------------------------------------------------------
   Archive Page
   -------------------------------------------------------------------------- */
.page-header {
    padding: var(--space-16) 0 var(--space-10);
    text-align: center;
    background-color: var(--color-bg-alt);
}

.page-header h1 {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-3);
}

.page-description {
    font-size: var(--font-size-lg);
    color: var(--color-text-muted);
}

/* Archive Filters */
.archive-filters {
    padding: var(--space-6) 0;
    border-bottom: 1px solid var(--color-border-light);
}

.archive-filters .container {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: var(--space-4);
}

.filter-group {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.filter-group label {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-muted);
}

.filter-select {
    font-family: var(--font-sans);
    font-size: var(--font-size-sm);
    padding: var(--space-2) var(--space-3);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background-color: var(--color-bg);
    cursor: pointer;
}

.filter-select:focus {
    outline: none;
    border-color: var(--color-accent);
}

.search-group {
    margin-left: auto;
}

.search-input {
    font-family: var(--font-sans);
    font-size: var(--font-size-sm);
    padding: var(--space-2) var(--space-4);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background-color: var(--color-bg);
    width: 240px;
}

.search-input:focus {
    outline: none;
    border-color: var(--color-accent);
}

.search-input::placeholder {
    color: var(--color-text-light);
}

@media (max-width: 768px) {
    .archive-filters .container {
        flex-direction: column;
        align-items: stretch;
    }

    .filter-group {
        width: 100%;
    }

    .filter-select,
    .search-input {
        flex: 1;
        width: 100%;
    }

    .search-group {
        margin-left: 0;
    }
}

/* Archive Content */
.archive-content {
    padding: var(--space-10) 0 var(--space-16);
}

.archive-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-8);
}

.archive-item {
    display: grid;
    grid-template-columns: 120px 1fr 160px;
    gap: var(--space-6);
    align-items: start;
    padding-bottom: var(--space-8);
    border-bottom: 1px solid var(--color-border-light);
}

.archive-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.archive-date {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    padding-top: var(--space-1);
}

.archive-info h2 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: var(--space-2);
}

.archive-info h2 a:hover {
    color: var(--color-accent);
}

.archive-info .excerpt {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin-bottom: var(--space-3);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.archive-meta {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
}

.category-badge {
    font-weight: 500;
    color: var(--color-accent);
}

.category-badge:hover {
    color: var(--color-accent-hover);
}

.archive-image {
    border-radius: var(--radius-md);
    overflow: hidden;
}

.archive-image img {
    width: 160px;
    height: 100px;
    object-fit: cover;
}

@media (max-width: 768px) {
    .archive-item {
        grid-template-columns: 1fr;
        gap: var(--space-3);
    }

    .archive-date {
        order: 2;
    }

    .archive-info {
        order: 1;
    }

    .archive-image {
        display: none;
    }
}

/* No Results */
.no-results {
    text-align: center;
    padding: var(--space-16) 0;
    color: var(--color-text-muted);
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.site-footer {
    background-color: var(--color-bg-alt);
    padding: var(--space-16) 0 var(--space-8);
    margin-top: auto;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--space-12);
    padding-bottom: var(--space-10);
    border-bottom: 1px solid var(--color-border-light);
}

.footer-brand .logo {
    font-size: var(--font-size-xl);
    font-weight: 700;
    display: inline-block;
    margin-bottom: var(--space-3);
}

.footer-brand p {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    max-width: 300px;
}

.footer-nav h4,
.footer-categories h4 {
    font-size: var(--font-size-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-4);
}

.footer-nav ul,
.footer-categories ul {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.footer-nav a,
.footer-categories a {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.footer-nav a:hover,
.footer-categories a:hover {
    color: var(--color-accent);
}

.footer-bottom {
    padding-top: var(--space-8);
    text-align: center;
}

.footer-bottom p {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
}

@media (max-width: 768px) {
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--space-8);
    }

    .footer-brand p {
        max-width: none;
    }
}

/* --------------------------------------------------------------------------
   Utilities
   -------------------------------------------------------------------------- */
[hidden] {
    display: none !important;
}

.fade-in {
    animation: fadeIn 0.3s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Focus styles for accessibility */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

/* Selection */
::selection {
    background-color: var(--color-accent);
    color: var(--color-bg);
}

/* Print styles */
@media print {
    .site-header,
    .site-footer,
    .share-buttons,
    .pagination,
    .related-posts {
        display: none;
    }

    .article-content {
        max-width: 100%;
    }
}