/* ===================================
   CSS Variables & Root Styles
   =================================== */
:root {
    /* Colors */
    --color-primary: #e74c3c;
    --color-primary-dark: #c0392b;
    --color-secondary: #2c3e50;
    --color-text: #333;
    --color-text-light: #666;
    --color-bg: #fff;
    --color-bg-alt: #f8f9fa;
    --color-border: #e1e4e8;
    --color-shadow: rgba(0, 0, 0, 0.1);

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 4rem;

    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-size-base: 16px;
    --line-height-base: 1.6;

    /* Container widths */
    --container-width: 1200px;
    --container-padding: 1.5rem;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
}

/* Dark mode support */
@media (prefers-color-scheme: dark) {
    :root {
        --color-text: #e1e4e8;
        --color-text-light: #b1b5b9;
        --color-bg: #0d1117;
        --color-bg-alt: #161b22;
        --color-border: #30363d;
        --color-shadow: rgba(0, 0, 0, 0.4);
    }
}

/* ===================================
   Base & Reset
   =================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: var(--font-size-base);
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    line-height: var(--line-height-base);
    color: var(--color-text);
    background-color: var(--color-bg);
    overflow-x: hidden;
}

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

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

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

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

main {
    min-height: calc(100vh - 200px);
}

/* ===================================
   Header & Navigation
   =================================== */
.site-header {
    background-color: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 4px var(--color-shadow);
}

.navbar {
    padding: var(--spacing-sm) 0;
}

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

.site-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
    text-decoration: none;
}

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

.navbar-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.nav-item {
    color: var(--color-text);
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: 4px;
    transition: background-color var(--transition-fast);
}

.nav-item:hover {
    background-color: var(--color-bg-alt);
}

.social-links {
    display: flex;
    gap: var(--spacing-sm);
    margin-left: var(--spacing-sm);
    padding-left: var(--spacing-sm);
    border-left: 1px solid var(--color-border);
}

.social-icon {
    color: var(--color-text-light);
    transition: color var(--transition-fast);
}

.social-icon:hover {
    color: var(--color-primary);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
    gap: 4px;
}

.hamburger {
    width: 25px;
    height: 2px;
    background-color: var(--color-text);
    transition: all var(--transition-fast);
}

/* ===================================
   Hero Section
   =================================== */
.hero {
    text-align: center;
    padding: var(--spacing-xxl) 0 var(--spacing-xl);
    background: linear-gradient(135deg, var(--color-bg-alt) 0%, var(--color-bg) 100%);
}

.hero-title {
    font-size: 3rem;
    font-weight: 800;
    color: var(--color-secondary);
    margin-bottom: var(--spacing-sm);
}

.hero-description {
    font-size: 1.25rem;
    color: var(--color-text-light);
    max-width: 600px;
    margin: 0 auto;
}

/* ===================================
   Recipe Grid (Homepage)
   =================================== */
.recipe-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    padding: var(--spacing-xl) 0;
}

.recipe-card {
    background-color: var(--color-bg);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 6px var(--color-shadow);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.recipe-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 12px var(--color-shadow);
}

.recipe-link {
    color: inherit;
    text-decoration: none;
    display: block;
}

.recipe-image-wrapper {
    width: 100%;
    aspect-ratio: 4 / 3;
    overflow: hidden;
    background-color: var(--color-bg-alt);
}

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

.recipe-card:hover .recipe-image {
    transform: scale(1.05);
}

.recipe-content {
    padding: var(--spacing-md);
}

.recipe-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-secondary);
    margin-bottom: var(--spacing-sm);
    line-height: 1.3;
}

.recipe-description {
    color: var(--color-text-light);
    margin-bottom: var(--spacing-sm);
    line-height: 1.5;
}

.recipe-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-text-light);
    font-size: 0.9rem;
}

.recipe-date {
    display: flex;
    align-items: center;
}

/* ===================================
   Single Recipe Page
   =================================== */
.recipe-single {
    padding: var(--spacing-xl) 0;
}

.recipe-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.recipe-single-title {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--color-secondary);
    margin-bottom: var(--spacing-sm);
    line-height: 1.2;
}

.recipe-meta-bar {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    color: var(--color-text-light);
    font-size: 0.95rem;
}

.recipe-hero-image {
    margin-bottom: var(--spacing-xl);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 8px 16px var(--color-shadow);
}

.recipe-hero-image img {
    width: 100%;
    height: auto;
}

.recipe-body {
    max-width: 800px;
    margin: 0 auto var(--spacing-xl);
}

.recipe-body h2 {
    font-size: 2rem;
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
    color: var(--color-secondary);
}

.recipe-body h3 {
    font-size: 1.5rem;
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
    color: var(--color-secondary);
}

.recipe-body h4 {
    font-size: 1.25rem;
    margin-top: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.recipe-body p {
    margin-bottom: var(--spacing-md);
}

.recipe-body ul,
.recipe-body ol {
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-lg);
}

.recipe-body li {
    margin-bottom: var(--spacing-xs);
}

.recipe-body table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: var(--spacing-lg);
    overflow-x: auto;
    display: block;
}

.recipe-body thead {
    background-color: var(--color-bg-alt);
}

.recipe-body th,
.recipe-body td {
    padding: var(--spacing-sm);
    text-align: left;
    border: 1px solid var(--color-border);
}

.recipe-body th {
    font-weight: 600;
    color: var(--color-secondary);
}

.recipe-body blockquote {
    border-left: 4px solid var(--color-primary);
    padding-left: var(--spacing-md);
    margin: var(--spacing-lg) 0;
    font-style: italic;
    color: var(--color-text-light);
}

.recipe-body hr {
    border: none;
    border-top: 2px solid var(--color-border);
    margin: var(--spacing-xl) 0;
}

/* Recipe Gallery */
.recipe-gallery {
    margin: var(--spacing-xxl) 0;
}

.recipe-gallery h2 {
    font-size: 2rem;
    margin-bottom: var(--spacing-lg);
    color: var(--color-secondary);
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: var(--spacing-md);
}

.gallery-item {
    aspect-ratio: 1;
    overflow: hidden;
    border-radius: 8px;
    box-shadow: 0 4px 6px var(--color-shadow);
    transition: transform var(--transition-base);
}

.gallery-item:hover {
    transform: scale(1.02);
}

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

/* Recipe Navigation */
.recipe-navigation {
    display: flex;
    justify-content: space-between;
    gap: var(--spacing-md);
    margin-top: var(--spacing-xxl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--color-border);
}

.nav-link {
    display: flex;
    flex-direction: column;
    padding: var(--spacing-md);
    background-color: var(--color-bg-alt);
    border-radius: 8px;
    transition: background-color var(--transition-fast);
    flex: 1;
}

.nav-link:hover {
    background-color: var(--color-border);
}

.nav-label {
    font-size: 0.875rem;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-xs);
}

.nav-title {
    font-weight: 600;
    color: var(--color-text);
}

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

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

/* ===================================
   Footer
   =================================== */
.site-footer {
    background-color: var(--color-secondary);
    color: #fff;
    padding: var(--spacing-xxl) 0 var(--spacing-lg);
    margin-top: var(--spacing-xxl);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-section h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-md);
}

.footer-section p {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.6;
}

.footer-social,
.footer-nav {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-link {
    color: rgba(255, 255, 255, 0.8);
    transition: color var(--transition-fast);
}

.footer-link:hover {
    color: #fff;
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
}

.footer-bottom a {
    color: rgba(255, 255, 255, 0.8);
}

/* ===================================
   Responsive Design - Tablet
   =================================== */
@media (max-width: 1024px) {
    :root {
        --spacing-xl: 2.5rem;
        --spacing-xxl: 3rem;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .recipe-grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
        gap: var(--spacing-md);
    }

    .recipe-single-title {
        font-size: 2rem;
    }

    .gallery-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    }
}

/* ===================================
   Responsive Design - Mobile
   =================================== */
@media (max-width: 768px) {
    :root {
        --font-size-base: 15px;
        --container-padding: 1rem;
        --spacing-xl: 2rem;
        --spacing-xxl: 2.5rem;
    }

    /* Header Navigation */
    .navbar-content {
        position: relative;
    }

    .mobile-menu-toggle {
        display: flex;
        z-index: 1001;
    }

    .navbar-menu {
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        background-color: var(--color-bg);
        flex-direction: column;
        align-items: stretch;
        padding: var(--spacing-md);
        box-shadow: 0 4px 8px var(--color-shadow);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: transform var(--transition-base), opacity var(--transition-base), visibility var(--transition-base);
    }

    .navbar-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-item {
        width: 100%;
        padding: var(--spacing-sm);
    }

    .social-links {
        border-left: none;
        border-top: 1px solid var(--color-border);
        padding-top: var(--spacing-md);
        padding-left: 0;
        margin-left: 0;
        margin-top: var(--spacing-sm);
        justify-content: center;
    }

    /* Hero */
    .hero {
        padding: var(--spacing-xl) 0 var(--spacing-lg);
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-description {
        font-size: 1rem;
    }

    /* Recipe Grid */
    .recipe-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
        padding: var(--spacing-lg) 0;
    }

    .recipe-card {
        max-width: 100%;
    }

    /* Single Recipe */
    .recipe-single {
        padding: var(--spacing-lg) 0;
    }

    .recipe-single-title {
        font-size: 1.75rem;
    }

    .recipe-body h2 {
        font-size: 1.5rem;
    }

    .recipe-body h3 {
        font-size: 1.25rem;
    }

    .recipe-body table {
        font-size: 0.875rem;
    }

    .recipe-body th,
    .recipe-body td {
        padding: var(--spacing-xs);
    }

    /* Gallery */
    .gallery-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
        gap: var(--spacing-sm);
    }

    /* Recipe Navigation */
    .recipe-navigation {
        flex-direction: column;
    }

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

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

    /* Footer */
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .site-footer {
        padding: var(--spacing-xl) 0 var(--spacing-md);
    }
}

/* ===================================
   Small Mobile Optimization
   =================================== */
@media (max-width: 480px) {
    :root {
        --font-size-base: 14px;
        --container-padding: 0.75rem;
    }

    .hero-title {
        font-size: 1.5rem;
    }

    .recipe-single-title {
        font-size: 1.5rem;
    }

    .recipe-content {
        padding: var(--spacing-sm);
    }

    .recipe-title {
        font-size: 1.25rem;
    }

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

/* ===================================
   Print Styles
   =================================== */
@media print {
    .site-header,
    .site-footer,
    .recipe-navigation,
    .social-links {
        display: none;
    }

    .recipe-single {
        padding: 0;
    }

    body {
        font-size: 12pt;
    }
}

/* ===================================
   Accessibility
   =================================== */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus styles for keyboard navigation */
a:focus,
button:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* Screen reader only content */
.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;
}