/* Variables */
:root {
    --color-background: #121212;
    --color-surface: #1e1e1e;
    --color-surface-variant: #252525;
    --color-primary: #bb86fc;
    --color-secondary: #03dac6;
    --color-on-background: #e1e1e1;
    --color-on-surface: #f5f5f5;
    --color-on-primary: #000000;
    --color-on-secondary: #000000;
    --color-error: #cf6679;
    --color-success: #03dac6;
    
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-xxl: 3rem;
    
    --font-heading: 'Playfair Display', serif;
    --font-body: 'Source Sans 3', sans-serif;
    
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    --border-radius-sm: 4px;
    --border-radius-md: 8px;
    --border-radius-lg: 16px;
}

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

/* Base Styles */
body {
    background-color: var(--color-background);
    color: var(--color-on-background);
    font-family: var(--font-body);
    line-height: 1.6;
    font-size: 16px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-md);
}

main {
    flex: 1;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--color-on-surface);
    line-height: 1.3;
}

h1 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-lg);
}

h2 {
    font-size: 2rem;
    margin-top: var(--spacing-xxl);
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--color-primary);
    display: inline-block;
}

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

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

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

a:hover {
    color: var(--color-secondary);
}

/* Layout Components */
header {
    padding: var(--spacing-xl) 0;
    text-align: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    background-color: var(--color-surface);
}

.search-container {
    background-color: var(--color-surface-variant);
    padding: var(--spacing-md) 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.search-wrapper {
    display: flex;
    max-width: 600px;
    margin: 0 auto;
}

.year-section {
    margin-bottom: var(--spacing-xxl);
    animation: fadeIn var(--transition-normal);
}

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

.info-box {
    background-color: var(--color-surface-variant);
    border-radius: var(--border-radius-md);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    border-left: 4px solid var(--color-primary);
}

.articles-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.archive-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

/* Cards */
.article-card {
    background-color: var(--color-surface);
    border-radius: var(--border-radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
    height: 100%;
    display: flex;
    flex-direction: column;
    position: relative;
}

.article-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.article-card__content {
    padding: var(--spacing-lg);
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    position: relative;
}

.article-card__month {
    background-color: var(--color-primary);
    color: var(--color-on-primary);
    padding: var(--spacing-xs) var(--spacing-md);
    font-weight: 600;
    font-size: 0.85rem;
    display: inline-block;
    border-radius: var(--border-radius-sm);
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
}

.article-card__title {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    margin-bottom: var(--spacing-md);
    line-height: 1.4;
    padding-right: 70px; /* Space for month tag */
}

.article-card__title a {
    color: var(--color-on-surface);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.article-card__title a:hover {
    color: var(--color-primary);
}

.article-card__excerpt {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.95rem;
    line-height: 1.5;
    margin-bottom: var(--spacing-md);
    flex-grow: 1;
}

.article-card__footer {
    margin-top: auto;
}

.archive-card {
    background-color: var(--color-surface);
    border-radius: var(--border-radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
    height: 100%;
    display: flex;
    flex-direction: column;
}

.archive-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    background-color: var(--color-surface-variant);
}

.archive-card__content {
    padding: var(--spacing-lg);
    text-align: center;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.archive-card__title {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
    color: var(--color-on-surface);
}

.archive-card__footer {
    margin-top: auto;
}

/* Buttons */
button {
    cursor: pointer;
    font-family: var(--font-body);
}

.article-card__btn, 
.archive-btn,
.show-more-btn,
.show-less-btn,
.back-btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: transparent;
    color: var(--color-primary);
    border: 1px solid var(--color-primary);
    border-radius: var(--border-radius-sm);
    text-decoration: none;
    font-weight: 600;
    font-size: 0.85rem;
    transition: all var(--transition-fast);
    cursor: pointer;
}

.article-card__btn:hover, 
.archive-btn:hover,
.show-more-btn:hover,
.show-less-btn:hover,
.back-btn:hover {
    background-color: var(--color-primary);
    color: var(--color-on-primary);
}

.show-more-container,
.back-to-archive {
    text-align: center;
    margin-top: var(--spacing-xl);
}

.show-more-btn,
.show-less-btn,
.back-btn {
    padding: var(--spacing-md) var(--spacing-lg);
}

/* Search */
#search-input {
    flex: 1;
    padding: var(--spacing-md);
    border: none;
    border-radius: var(--border-radius-sm) 0 0 var(--border-radius-sm);
    font-size: 1rem;
    background-color: var(--color-surface);
    color: var(--color-on-surface);
}

#search-input::placeholder {
    color: rgba(255, 255, 255, 0.5);
}

#search-input:focus {
    outline: none;
    box-shadow: 0 0 0 2px var(--color-primary);
}

#search-button {
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: var(--color-primary);
    color: var(--color-on-primary);
    border: none;
    border-radius: 0 var(--border-radius-sm) var(--border-radius-sm) 0;
    font-weight: 600;
    cursor: pointer;
    transition: background-color var(--transition-fast);
}

#search-button:hover {
    background-color: var(--color-secondary);
}

.no-results {
    grid-column: 1 / -1;
    text-align: center;
    padding: var(--spacing-xl);
    background-color: var(--color-surface-variant);
    border-radius: var(--border-radius-md);
}

.results-count {
    margin-bottom: var(--spacing-lg);
    font-style: italic;
    color: rgba(255, 255, 255, 0.7);
}

.search-results-year {
    font-size: 1.5rem;
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
    color: var(--color-secondary);
    border-bottom: 1px solid var(--color-secondary);
    display: inline-block;
    padding-bottom: var(--spacing-xs);
}

/* Footer */
footer {
    margin-top: var(--spacing-xxl);
    padding: var(--spacing-xl) 0;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.875rem;
    background-color: var(--color-surface);
}

/* Responsive */
@media (max-width: 768px) {
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.75rem;
    }
    
    .articles-container,
    .archive-grid {
        grid-template-columns: 1fr;
    }
    
    .search-wrapper {
        flex-direction: column;
    }
    
    #search-input {
        border-radius: var(--border-radius-sm) var(--border-radius-sm) 0 0;
    }
    
    #search-button {
        border-radius: 0 0 var(--border-radius-sm) var(--border-radius-sm);
    }
}

/* Animation classes */
.fade-in {
    animation: fadeIn var(--transition-normal);
}

.slide-in {
    animation: slideIn var(--transition-normal);
}

@keyframes slideIn {
    from { transform: translateY(30px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}