:root {
    --bg: hsl(0, 0%, 5%);
    --card-bg: hsl(0, 0%, 10%);
    --bg-dark: hsl(0, 0%, 0%);
    --border: hsl(217, 33%, 17%);
    --text-main: hsl(0, 0%, 95%);
    --text-dim: hsl(0, 0%, 70%);
    --accent: hsl(199, 95%, 61%);
    --nav-gap: 2rem;
}

[data-theme="light"] {
    --bg: hsl(0, 0%, 100%);
    --card-bg: hsl(210, 40%, 98%);
    --border: hsl(214, 32%, 91%);
    --text-main: hsl(222, 47%, 11%);
    --text-dim: hsl(215, 16%, 47%);
    --accent: hsl(199, 89%, 48%);
}

body {
    background-color: var(--bg);
    color: var(--text-main);
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    margin: 0;
    transition: background 0.3s ease, color 0.3s ease;
}

.grid-container {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    max-width: 850px;
    margin: 0 auto;
    padding: 3rem 1.5rem;
    gap: 1.5rem;
}

.top-bar {
    grid-column: span 12;
    display: flex;
    justify-content: space-between; 
    align-items: center;          
    width: 100%;
}

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

.main-nav a {
    color: var(--text-dim);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
}

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

.theme-toggle-btn {
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
    display: flex;
    align-items: center; 
    justify-content: center;
    color: var(--text-main);
    font-size: 1.2rem;
    transition: transform 0.2s ease;
}

.theme-toggle-btn .moon-icon {
    display: none;
}

.theme-toggle-btn .sun-icon {
    display: block;
}

[data-theme="light"] .theme-toggle-btn .sun-icon {
    display: none;
}

[data-theme="light"] .theme-toggle-btn .moon-icon {
    display: block;
    color: var(--text-main);
}

.theme-toggle-btn:hover {
    transform: scale(1.1);
}

.search-section {
    grid-column: span 12; 
    width: 100%;
    margin-top: 1rem;
    margin-bottom: 0.5rem;
}

.search-container {
    display: flex;
    gap: 12px;
    align-items: center;
    width: 100%;
}

.search-input {
    flex: 1; 
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 10px 16px; 
    color: var(--text-main);
    font-size: 0.95rem;
    outline: none;
    width: 100%; 
}

.search-filters {
    grid-column: span 12;
    display: flex;
    justify-content: flex-end; 
    align-items: center;
    margin-top: 1rem;
    color: var(--text-dim);
    font-size: 0.85rem;
    width: 100%;
}

.filter-right {
    display: flex;
    align-items: center;
    gap: 1rem; 
}

.search-input:focus {
    border-color: var(--accent);
}

.search-input::placeholder {
    color: var(--text-dim);
    opacity: 0.6;
}

.clear-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--card-bg);
    border: 1px solid transparent; 
    border-radius: 6px;
    padding: 10px 16px;
    color: var(--text-dim);
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.clear-btn:hover {
    background: var(--border);
    color: var(--text-main);
}

.clear-btn svg {
    width: 16px;
    height: 16px;
}

.clear-txt {
    font-size: 1rem;
    font-weight: 500;
}

#sort {
    background: transparent;
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 0;
    cursor: default;
}

#sort:hover {
    background: transparent; 
}

.sort-select {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 0.2rem;
    color: var(--text);
    font-weight: 500;
    cursor: pointer;
    font-size: 1rem;
    outline: none;
    appearance: none;
    padding: 4px 20px 4px 4px; 
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    min-width: 7.2rem;
}

[data-theme="light"] .sort-select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='black' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 9 6 6 6-6'/%3E%3C/svg%3E");
}

.sort-select option {
    background-color: var(--card-bg);
    color: var(--text-main);
}

.posts-list {
    grid-column: span 12;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-top: 2rem;
}

.post-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.5rem;
    display: flex;
    justify-content: space-between;
    gap: 2rem;
    transition: transform 0.2s ease, border-color 0.2s ease;
}

.post-card:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
}

.post-content-left {
    flex: 1;
}

.post-title {
    text-decoration: none;
    color: var(--text-main);
}

.post-title h3 {
    margin: 0 0 0.75rem 0;
    font-size: 1.4rem;
    font-weight: 700;
}

.post-preview {
    color: var(--text-dim);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 1.25rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.post-tags {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.tag {
    background: hsla(0, 0%, 100%, 0.05);
    border: 1px solid var(--border);
    color: var(--text-dim);
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 500;
}

.post-metadata-right {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    min-width: 140px;
    align-items: flex-end; 
    padding-top: 0.25rem;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-dim);
    font-size: 0.85rem;
    white-space: nowrap;
}

.meta-item svg {
    opacity: 0.7;
}

.no-results {
    color: #8b949e;
    text-align: center;
    margin-top: 3rem;
    font-style: italic;
}

.contact-footer {
    grid-column: span 12;
    margin-top: 6rem;
    padding-top: 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-dim);
    font-size: 0.9rem;
    border-top: 1px solid var(--border); 
}

.footer-socials {
    display: flex;
    gap: 1.5rem;
}

.footer-socials a {
    color: var(--text-dim);
    transition: color 0.2s;
}

.footer-socials a:hover {
    color: var(--text-main);
}

@media (max-width: 600px) {
    .grid-container {
        padding: 1.5rem 1rem;
    }
    
    .post-card {
        padding: 1.25rem;
    }

    .post-metadata-right {
        gap: 1rem;
        flex-wrap: wrap; 
    }
}

@media (max-width: 400px) {
    .main-nav { gap: 1rem;}
}