:root {
    --bg: #fafafa;
    --surface: #fff;
    --border: #e5e5e5;
    --text: #333;
    --text-secondary: #666;
    --accent: #22c55e;
    --accent2: #0ea5e9;
    --shadow: 0 2px 8px rgba(0,0,0,0.08);
    --radius: 12px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: color 0.2s;
}

a:hover {
    color: #16a34a;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.site-header {
    background: var(--surface);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 0;
}

.logo {
    font-size: 20px;
    font-weight: 700;
    color: var(--accent);
}

.main-nav {
    display: flex;
    gap: 24px;
}

.main-nav a {
    color: var(--text);
    font-weight: 500;
    padding: 8px 0;
    position: relative;
}

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

.main-nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: width 0.2s;
}

.main-nav a:hover::after,
.main-nav a.active::after {
    width: 100%;
}

.admin-link {
    color: var(--text-secondary) !important;
    font-size: 14px;
}

.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
}

/* Content Layout */
.main-content {
    padding: 40px 0;
}

.content-wrapper {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 40px;
}

.main-area {
    min-width: 0;
}

.sidebar-area {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

/* Post Card */
.post-card {
    background: var(--surface);
    padding: 24px;
    border-radius: var(--radius);
    margin-bottom: 20px;
    box-shadow: var(--shadow);
    transition: transform 0.2s, box-shadow 0.2s;
}

.post-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(0,0,0,0.12);
}

.post-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
    font-size: 14px;
    color: var(--text-secondary);
}

.category-tag {
    background: var(--accent);
    color: #fff;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
}

.category-tag:hover {
    background: #16a34a;
    color: #fff;
}

.post-title {
    font-size: 20px;
    margin-bottom: 12px;
}

.post-title a {
    color: var(--text);
}

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

.post-excerpt {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* Sidebar Widgets */
.sidebar-widget {
    background: var(--surface);
    padding: 20px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.sidebar-widget h3 {
    font-size: 16px;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--accent);
}

.category-list,
.recent-list {
    list-style: none;
}

.category-list li a,
.recent-list li a {
    display: flex;
    justify-content: space-between;
    padding: 10px 0;
    color: var(--text);
    border-bottom: 1px solid var(--border);
}

.category-list li:last-child a,
.recent-list li:last-child a {
    border-bottom: none;
}

.category-list li a:hover,
.recent-list li a:hover {
    color: var(--accent);
}

.cat-count {
    background: var(--bg);
    padding: 2px 8px;
    border-radius: 10px;
    font-size: 12px;
    color: var(--text-secondary);
}

/* Single Post */
.post-single {
    background: var(--surface);
    padding: 40px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.post-header {
    margin-bottom: 32px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border);
}

.post-header .post-meta {
    margin-bottom: 16px;
}

.post-header .post-title {
    font-size: 32px;
    margin-bottom: 0;
}

.post-content {
    line-height: 1.8;
    font-size: 16px;
}

.post-content p {
    margin-bottom: 16px;
}

/* Comments */
.comments-section {
    margin-top: 40px;
}

.comments-section h3 {
    font-size: 20px;
    margin-bottom: 24px;
}

.comment-list {
    margin-bottom: 40px;
}

.comment-item {
    background: var(--surface);
    padding: 20px;
    border-radius: var(--radius);
    margin-bottom: 16px;
    border: 1px solid var(--border);
}

.comment-author {
    font-weight: 600;
    color: var(--accent);
}

.comment-date {
    font-size: 12px;
    color: var(--text-secondary);
    margin: 4px 0 12px;
}

.comment-form {
    background: var(--surface);
    padding: 24px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.comment-form h4 {
    margin-bottom: 16px;
}

.comment-form .form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.comment-form input,
.comment-form textarea {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
    margin-bottom: 16px;
    transition: border-color 0.2s;
    font-family: inherit;
}

.comment-form input:focus,
.comment-form textarea:focus {
    outline: none;
    border-color: var(--accent);
}

.btn-submit {
    background: var(--accent);
    color: #fff;
    border: none;
    padding: 12px 32px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
}

.btn-submit:hover {
    background: #16a34a;
}

.comment-success {
    background: #dcfce7;
    color: #16a34a;
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 16px;
}

.comment-error {
    background: #fee2e2;
    color: #dc2626;
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 16px;
}

.no-comments {
    color: var(--text-secondary);
    text-align: center;
    padding: 40px 0;
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    margin-top: 32px;
}

.pagination a {
    display: inline-block;
    padding: 8px 16px;
    background: var(--surface);
    border-radius: 8px;
    color: var(--text);
    box-shadow: var(--shadow);
    transition: all 0.2s;
}

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

.pagination a.active {
    background: var(--accent);
    color: #fff;
}

/* Archive */
.archive-header {
    margin-bottom: 32px;
}

.archive-stats {
    color: var(--text-secondary);
    margin-top: 8px;
}

.archive-year {
    margin-bottom: 32px;
}

.year-title {
    font-size: 28px;
    color: var(--accent);
    margin-bottom: 16px;
}

.archive-month {
    margin-bottom: 24px;
    padding-left: 20px;
}

.month-title {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.archive-list {
    list-style: none;
}

.archive-list li {
    display: flex;
    align-items: center;
    padding: 8px 0;
    border-bottom: 1px solid var(--border);
}

.archive-date {
    color: var(--text-secondary);
    font-size: 14px;
    width: 60px;
    flex-shrink: 0;
}

.archive-title {
    color: var(--text);
}

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

/* Category Header */
.category-header {
    background: var(--surface);
    padding: 32px;
    border-radius: var(--radius);
    margin-bottom: 24px;
    box-shadow: var(--shadow);
}

.category-desc {
    color: var(--text-secondary);
    margin-top: 12px;
}

/* Empty State */
.empty-state {
    background: var(--surface);
    padding: 60px 20px;
    text-align: center;
    border-radius: var(--radius);
    color: var(--text-secondary);
}

/* Footer */
.site-footer {
    background: var(--surface);
    padding: 24px 0;
    text-align: center;
    color: var(--text-secondary);
    margin-top: 60px;
    border-top: 1px solid var(--border);
}

/* Responsive */
@media (max-width: 900px) {
    .content-wrapper {
        grid-template-columns: 1fr;
    }
    
    .sidebar-area {
        order: 2;
    }
    
    .main-area {
        order: 1;
    }
}

@media (max-width: 600px) {
    .main-nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--surface);
        flex-direction: column;
        padding: 16px;
        gap: 12px;
        box-shadow: var(--shadow);
    }
    
    .main-nav.show {
        display: flex;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .header-inner {
        position: relative;
    }
    
    .post-header .post-title {
        font-size: 24px;
    }
    
    .post-single {
        padding: 24px;
    }
    
    .comment-form .form-row {
        grid-template-columns: 1fr;
    }
}