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

/* Variabile pentru teme - Light Mode (default) */
:root {
    --bg-color: #ffffff;
    --text-color: #333333;
    --text-secondary: #666666;
    --border-color: #e0e0e0;
    --link-color: #d4a5a5;
    --link-hover: #b88b8b;
    --code-bg: #f5f5f5;
    --header-bg: #fafafa;
}

/* Dark Mode - prin clasă pe HTML */
html.theme-dark {
    --bg-color: #1a1a1a;
    --text-color: #e0e0e0;
    --text-secondary: #a0a0a0;
    --border-color: #333333;
    --link-color: #d4a5a5;
    --link-hover: #e8c4c4;
    --code-bg: #2a2a2a;
    --header-bg: #0f0f0f;
}

/* Dark Mode - prin preferință OS (dacă nu e setată tema explicit) */
@media (prefers-color-scheme: dark) {
    html:not(.theme-light) {
        --bg-color: #1a1a1a;
        --text-color: #e0e0e0;
        --text-secondary: #a0a0a0;
        --border-color: #333333;
        --link-color: #d4a5a5;
        --link-hover: #e8c4c4;
        --code-bg: #2a2a2a;
        --header-bg: #0f0f0f;
    }
}

/* Bază */
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, "Noto Sans", sans-serif;
    font-size: 15px;
    line-height: 1.65;
    color: var(--text-color);
    background-color: var(--bg-color);
    transition: background-color 0.3s ease, color 0.3s ease;
    font-weight: 400;
    letter-spacing: 0.01em;
}

/* Container */
.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.header {
    background-color: var(--bg-color);
    border-bottom: 1px solid var(--border-color);
    padding: 25px 0;
    transition: background-color 0.3s ease, border-color 0.3s ease;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
    background-color: rgba(255, 255, 255, 0.95);
}

html.theme-dark .header {
    background-color: rgba(26, 26, 26, 0.95);
}

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

.logo-link {
    text-decoration: none;
    display: block;
    transition: opacity 0.2s ease;
}

.logo-link:hover {
    opacity: 0.8;
}

/* Logo switching - doar cu CSS */
.logo {
    height: 45px;
    width: auto;
    display: none;
}

/* Light mode: arată logo-light */
html.theme-light .logo-light,
html:not(.theme-dark):not(.theme-light) .logo-light {
    display: block;
}

/* Dark mode explicit: arată logo-dark */
html.theme-dark .logo-dark {
    display: block;
}

/* Dark mode prin preferință OS (dacă nu e setată tema explicit) */
@media (prefers-color-scheme: dark) {
    html:not(.theme-light) .logo-light {
        display: none;
    }
    html:not(.theme-light) .logo-dark {
        display: block;
    }
}

/* Navigație */
.nav {
    display: flex;
    align-items: center;
    gap: 15px;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: color 0.2s ease;
}

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

.nav-link.active {
    color: var(--link-color);
    font-weight: 600;
}

.nav-separator {
    color: var(--border-color);
}

.theme-toggle {
    text-decoration: none;
    font-size: 20px;
    line-height: 1;
    color: var(--text-secondary);
    cursor: pointer;
    transition: color 0.2s ease, transform 0.2s ease;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
}

.theme-toggle:hover {
    color: var(--text-color);
    transform: scale(1.1);
}

/* Main */
.main {
    padding: 60px 0;
    min-height: calc(100vh - 200px);
}

/* Page header */
.page-header {
    margin-bottom: 40px;
}

.page-header h1 {
    font-size: 36px;
    font-weight: 500;
    color: var(--text-color);
    letter-spacing: -0.02em;
}

/* Articles list */
.articles-list {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.article-preview {
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 30px;
    transition: border-color 0.3s ease;
}

.article-preview:last-child {
    border-bottom: none;
}

.article-meta {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 10px;
    font-weight: 500;
    letter-spacing: 0.02em;
    text-transform: uppercase;
}

.article-title {
    font-size: 26px;
    font-weight: 500;
    margin-bottom: 12px;
    letter-spacing: -0.01em;
    line-height: 1.3;
}

.article-title a {
    color: var(--text-color);
    text-decoration: none;
    transition: color 0.2s ease;
}

.article-title a:hover {
    color: var(--link-color);
}

.article-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 12px;
}

.tag {
    display: inline-block;
    padding: 5px 14px;
    background-color: var(--code-bg);
    color: var(--text-secondary);
    font-size: 11px;
    border-radius: 14px;
    font-weight: 500;
    letter-spacing: 0.03em;
    text-transform: uppercase;
    transition: background-color 0.2s ease, color 0.2s ease;
}

.article-description {
    color: var(--text-secondary);
    margin-bottom: 14px;
    line-height: 1.65;
    font-size: 15px;
}

.read-more {
    color: var(--link-color);
    text-decoration: none;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.02em;
    text-transform: uppercase;
    transition: color 0.2s ease;
}

.read-more:hover {
    color: var(--link-hover);
}

.no-articles {
    color: var(--text-secondary);
    font-style: italic;
}

/* Article full */
.article-full {
    max-width: 700px;
}

.article-header {
    margin-bottom: 40px;
}

.back-link {
    color: var(--link-color);
    text-decoration: none;
    font-size: 14px;
    margin-bottom: 20px;
    display: inline-block;
    transition: color 0.2s ease;
}

.back-link:hover {
    color: var(--link-hover);
}

.article-title-main {
    font-size: 42px;
    font-weight: 500;
    margin: 20px 0 15px 0;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

/* Article content */
.article-content {
    font-size: 16px;
    line-height: 1.75;
}

.article-content h1,
.article-content h2,
.article-content h3,
.article-content h4,
.article-content h5,
.article-content h6 {
    margin-top: 36px;
    margin-bottom: 18px;
    font-weight: 500;
    line-height: 1.3;
    letter-spacing: -0.01em;
}

.article-content h1 { font-size: 32px; }
.article-content h2 { font-size: 28px; }
.article-content h3 { font-size: 22px; }
.article-content h4 { font-size: 19px; }
.article-content h5 { font-size: 17px; }
.article-content h6 { font-size: 16px; }

.article-content p {
    margin-bottom: 20px;
}

.article-content a {
    color: var(--link-color);
    text-decoration: underline;
    transition: color 0.2s ease;
}

.article-content a:hover {
    color: var(--link-hover);
}

.article-content ul,
.article-content ol {
    margin-bottom: 20px;
    padding-left: 30px;
}

.article-content li {
    margin-bottom: 8px;
}

.article-content img {
    max-width: 100%;
    height: auto;
    border-radius: 4px;
    margin: 20px 0;
}

.article-content code {
    background-color: var(--code-bg);
    padding: 2px 6px;
    border-radius: 3px;
    font-family: "Monaco", "Courier New", monospace;
    font-size: 14px;
}

.article-content pre {
    background-color: var(--code-bg);
    padding: 16px;
    border-radius: 6px;
    overflow-x: auto;
    margin: 20px 0;
}

.article-content pre code {
    background-color: transparent;
    padding: 0;
    font-size: 14px;
}

.article-content blockquote {
    border-left: 3px solid var(--link-color);
    padding-left: 20px;
    margin: 20px 0;
    color: var(--text-secondary);
    font-style: italic;
}

/* Footer */
.footer {
    border-top: 1px solid var(--border-color);
    padding: 40px 0 25px 0;
    margin-top: 60px;
    transition: border-color 0.3s ease;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    margin-bottom: 30px;
}

.footer-logo-section {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-logo-link {
    display: inline-block;
    transition: opacity 0.2s ease;
}

.footer-logo-link:hover {
    opacity: 0.8;
}

.footer-logo {
    height: 40px;
    width: auto;
    display: none;
}

/* Light mode: arată footer-logo-light */
html.theme-light .footer-logo-light,
html:not(.theme-dark):not(.theme-light) .footer-logo-light {
    display: block;
}

/* Dark mode explicit: arată footer-logo-dark */
html.theme-dark .footer-logo-dark {
    display: block;
}

/* Dark mode prin preferință OS */
@media (prefers-color-scheme: dark) {
    html:not(.theme-light) .footer-logo-light {
        display: none;
    }
    html:not(.theme-light) .footer-logo-dark {
        display: block;
    }
}

.footer-tagline {
    color: var(--text-secondary);
    font-size: 13px;
    line-height: 1.5;
}

.footer-section h4 {
    font-size: 14px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 15px;
    color: var(--text-color);
}

.footer-section p {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.6;
}

.footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-links li {
    margin-bottom: 10px;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    transition: color 0.2s ease;
}

.footer-links a:hover {
    color: var(--link-color);
}

.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding-top: 20px;
    text-align: center;
}

.footer-bottom p {
    color: var(--text-secondary);
    font-size: 13px;
    letter-spacing: 0.02em;
}

/* Responsive */
@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }

    .header-content {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }

    .main {
        padding: 40px 0;
    }

    .page-header h1 {
        font-size: 28px;
    }

    .article-title {
        font-size: 20px;
    }

    .article-title-main {
        font-size: 28px;
    }

    .article-content {
        font-size: 16px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
        text-align: center;
    }

    .footer-links {
        text-align: center;
    }
}