:root {
    --color-bg: #ffffff;
    --color-text: #1a1a1a;
    --color-text-light: #555555;
    --color-accent: #0056b3;
    --color-accent-hover: #004494;
    --color-border: #e1e1e1;
    --color-meta: #767676;
    --color-bg-secondary: #f9f9f9;
    --color-error: #d32f2f;
    --font-main: 'Open Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --container-width: 800px;
    --container-width-wide: 1200px;
    --header-height: 70px;
    --transition: 0.3s ease;
}

[data-theme="dark"] {
    --color-bg: #121212;
    --color-text: #e0e0e0;
    --color-text-light: #b0b0b0;
    --color-accent: #4dabf7;
    --color-accent-hover: #74c0fc;
    --color-border: #333333;
    --color-meta: #a0a0a0;
    --color-bg-secondary: #1e1e1e;
}

/* Reset & Base */
*, *::before, *::after { box-sizing: border-box; }
body {
    background-color: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-main);
    line-height: 1.6;
    margin: 0;
    transition: background-color var(--transition), color var(--transition);
}

a { color: var(--color-accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-accent-hover); text-decoration: underline; }
img { max-width: 100%; height: auto; display: block; }

/* Accessibility */
.screen-reader-text {
    border: 0; clip: rect(1px, 1px, 1px, 1px); clip-path: inset(50%);
    height: 1px; margin: -1px; overflow: hidden; padding: 0;
    position: absolute; width: 1px; word-wrap: normal !important;
}
.skip-link {
    position: absolute; top: -9999px; left: 0; background: var(--color-accent);
    color: #fff; padding: 1rem; z-index: 9999;
}
.skip-link:focus { top: 0; }

/* Layout */
.container { width: 90%; max-width: var(--container-width); margin: 0 auto; }
.container-wide { width: 90%; max-width: var(--container-width-wide); margin: 0 auto; }

/* Header */
.site-header {
    background: var(--color-bg); border-bottom: 1px solid var(--color-border);
    position: sticky; top: 0; z-index: 100; height: var(--header-height);
    display: flex; align-items: center;
}
.header-inner { display: flex; justify-content: space-between; align-items: center; width: 100%; }
.site-branding { font-weight: 700; font-size: 1.5rem; }
.site-branding a { color: var(--color-text); text-decoration: none; }

.main-navigation ul { display: flex; list-style: none; margin: 0; padding: 0; gap: var(--spacing-md); }
.main-navigation a { color: var(--color-text); font-weight: 600; }

.header-actions { display: flex; gap: 1rem; align-items: center; }
.theme-toggle { background: none; border: 1px solid var(--color-border); cursor: pointer; padding: 0.5rem; border-radius: 4px; color: var(--color-text); }

/* Progress Bar */
.reading-progress { position: fixed; top: var(--header-height); left: 0; width: 0%; height: 3px; background: var(--color-accent); z-index: 99; transition: width 0.1s; }

/* Hero */
.hero-section { padding: var(--spacing-lg) 0; text-align: center; background: var(--color-bg-secondary); margin-bottom: var(--spacing-lg); }
.hero-title { font-size: 3rem; margin-bottom: var(--spacing-sm); line-height: 1.2; }
.hero-meta { color: var(--color-meta); font-size: 0.9rem; }

/* Breaking News */
.breaking-news { background: var(--color-accent); color: white; padding: 0.5rem 0; font-size: 0.9rem; }
.breaking-label { font-weight: bold; margin-right: 1rem; text-transform: uppercase; }
.breaking-link { color: white; }

/* Posts Grid */
.posts-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: var(--spacing-md); margin-bottom: var(--spacing-lg); }
.post-card { display: flex; flex-direction: column; }
.post-thumbnail { margin-bottom: 1rem; border-radius: 8px; overflow: hidden; aspect-ratio: 16/9; background: var(--color-bg-secondary); }
.post-thumbnail img { width: 100%; height: 100%; object-fit: cover; transition: transform var(--transition); }
.post-card:hover .post-thumbnail img { transform: scale(1.05); }
.entry-title { font-size: 1.5rem; margin: 0.5rem 0; line-height: 1.3; }
.entry-title a { color: var(--color-text); text-decoration: none; }
.entry-title a:hover { color: var(--color-accent); }
.entry-meta { color: var(--color-meta); font-size: 0.85rem; margin-bottom: 0.5rem; }

/* Single Post */
.single-content { font-size: 1.25rem; line-height: 1.8; color: var(--color-text-light); }
.single-content p { margin-bottom: 1.5em; }
.single-content h2, .single-content h3 { color: var(--color-text); margin-top: 2em; margin-bottom: 0.5em; }
.single-content blockquote { border-left: 4px solid var(--color-accent); margin: 2em 0; padding-left: 1.5em; font-style: italic; color: var(--color-text); }
.drop-cap::first-letter { font-size: 3.5em; float: left; margin-top: 0.15em; margin-right: 0.1em; line-height: 0.7; color: var(--color-accent); }
.article-header { text-align: center; margin-bottom: var(--spacing-lg); }
.article-title { font-size: 3.5rem; line-height: 1.1; margin-bottom: 1rem; }

/* Comments */
.comments-area { margin-top: var(--spacing-lg); padding-top: var(--spacing-md); border-top: 1px solid var(--color-border); }
.comment-list { list-style: none; padding: 0; }
.comment-body { margin-bottom: var(--spacing-md); padding-bottom: var(--spacing-md); border-bottom: 1px solid var(--color-border); }
.comment-meta { margin-bottom: 0.5rem; font-size: 0.9rem; color: var(--color-meta); }
.comment-form textarea { width: 100%; padding: 1rem; border: 1px solid var(--color-border); background: var(--color-bg); color: var(--color-text); }

/* Footer */
.site-footer { background: var(--color-bg-secondary); padding: var(--spacing-lg) 0; margin-top: var(--spacing-lg); border-top: 1px solid var(--color-border); }
.footer-inner { display: flex; flex-direction: column; align-items: center; gap: 1rem; text-align: center; }

/* Mobile */
@media (max-width: 768px) {
    .header-inner { flex-wrap: wrap; }
    .main-navigation { width: 100%; display: none; margin-top: 1rem; }
    .main-navigation.active { display: block; }
    .main-navigation ul { flex-direction: column; gap: 0.5rem; text-align: center; }
    .menu-toggle { display: block; }
    .article-title { font-size: 2.5rem; }
    .hero-title { font-size: 2rem; }
}
@media (min-width: 769px) {
    .menu-toggle { display: none; }
}

/* Utilities */
.btn { display: inline-block; padding: 0.8rem 1.5rem; background: var(--color-accent); color: white; border-radius: 4px; font-weight: 600; border: none; cursor: pointer; }
.btn:hover { background: var(--color-accent-hover); text-decoration: none; color: white; }
.text-center { text-align: center; }
.mb-4 { margin-bottom: 2rem; }