:root {
    --bg-color: #121212;
    --surface-color: #1e1e1e;
    --text-color: #e0e0e0;
    --accent-color: #5c9c95;
    --accent-hover-color: #4a7d77;
    --border-color: #333;
    --navbar-bg: rgba(18, 18, 18, 0.95);
    --hero-text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.7);
    --transition-base: 0.3s ease;
    --border-radius: 8px;
    --catalog-bg: rgba(30, 30, 30, 0.8);
}

[data-theme="light"] {
    --bg-color: #f4f4f4;
    --surface-color: #ffffff;
    --text-color: #212121;
    --border-color: #ddd;
    --navbar-bg: rgba(255, 255, 255, 0.95);
    --hero-text-shadow: 2px 2px 8px rgba(255, 255, 255, 0.7);
    --catalog-bg: rgba(255, 255, 255, 0.8);
}

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

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    font-family: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: background-color var(--transition-base), color var(--transition-base);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
}

.navbar {
    background-color: var(--navbar-bg);
    backdrop-filter: blur(10px);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
    transition: background-color var(--transition-base), border-color var(--transition-base);

    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    width: 100%;
}

.logo img {
    height: 40px;
    display: block;
}

.nav-controls {
    display: flex;
    align-items: center;
    gap: 0.7rem;
}

.burger-icon,
.theme-switch-label {
    cursor: pointer;
    padding: 5px 10px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    transition: transform var(--transition-base), background-color var(--transition-base), border-color var(--transition-base);
}

.burger-icon {
    font-size: 1.5rem;
    color: var(--text-color);
}

.burger-icon:hover {
    transform: scale(1.05);
    border-color: var(--accent-color);
}

.menu {
    position: fixed;
    top: 0;
    right: -250px;
    width: 250px;
    height: 100vh;
    background-color: var(--surface-color);
    padding: 1rem 1rem 7rem 1rem;
    box-shadow: -2px 0 10px rgba(0, 0, 0, 0.2);
    transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 999;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    overflow-y: auto;
    outline: none;
}

.menu.open {
    right: 0;
}

.menu-close-btn {
    align-self: flex-end;
    background: none;
    border: none;
    color: var(--text-color);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0;
    margin-bottom: 1rem;
}

.menu-close-btn:hover {
    color: var(--accent-color);
}

.menu a {
    color: var(--text-color);
    text-decoration: none;
    font-size: 1rem;
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border-color);
    transition: color var(--transition-base);
}

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

.theme-switch-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.2rem;
    color: var(--text-color);
    padding: 0.5rem;
}

.theme-switch-label:hover {
    border-color: var(--accent-color);
}

.theme-switch-label .fa-sun,
.theme-switch-label .fa-moon {
    transition: opacity var(--transition-base);
}

.hero {
    flex-grow: 1;
    background-color: var(--bg-color);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    padding: 4rem 2rem;
    transition: background-color var(--transition-base);
}

.hero h1 {
    font-size: clamp(3rem, 8vw, 6rem);
    margin-bottom: 1rem;
    text-shadow: var(--hero-text-shadow);
}

.hero p {
    font-size: clamp(1.2rem, 3vw, 1.8rem);
    text-shadow: var(--hero-text-shadow);
    margin-bottom: 3rem;
}

.catalog {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    padding-bottom: 50px;
    width: 100%;
    max-width: 900px;
    margin-top: 2rem;
}

.catalog-item {
    background-color: var(--catalog-bg);
    border-radius: var(--border-radius);
    padding: 2rem 1rem;
    text-align: center;
    transition: transform var(--transition-base), background-color var(--transition-base);
    border: 1px solid var(--border-color);
    aspect-ratio: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-decoration: none;
    color: var(--accent-color);
}

.catalog-item:hover {
    transform: translateY(-5px);
    background-color: var(--accent-color);
    color: white;
}

.catalog-item i {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.catalog-item span {
    font-size: 1.2rem;
    font-weight: bold;
    color: var(--text-color);
}

.footer {
    background-color: var(--surface-color);
    color: var(--text-color);
    padding: 3rem 2rem;
    border-top: 1px solid var(--border-color);
    margin-top: auto;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    text-align: left;
}

.footer-column h3 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: var(--accent-color);
}

.footer-column p {
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}

.footer-column ul {
    list-style: none;
}

.footer-column ul li {
    margin-bottom: 0.75rem;
}

.footer-column ul li a {
    color: var(--text-color);
    text-decoration: none;
    transition: color var(--transition-base);
}

.footer-column ul li a:hover {
    color: var(--accent-color);
    text-decoration: underline;
}

.footer-column .site-name {
    font-size: 1.1rem;
    font-weight: bold;
    margin-bottom: 0.5rem;
}

.footer-column .copyright {
    font-size: 0.9rem;
    opacity: 0.7;
}


.menu-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 998;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, visibility 0.3s;
}

.menu-overlay.active {
    opacity: 1;
    visibility: visible;
}


.menu::-webkit-scrollbar {
    width: 6px;
}

.menu::-webkit-scrollbar-track {
    background: var(--surface-color);
}

.menu::-webkit-scrollbar-thumb {
    background: var(--accent-color);
    border-radius: 3px;
}

.menu::-webkit-scrollbar-thumb:hover {
    background: var(--accent-hover-color);
}

@media (max-width: 768px) {
    .navbar {
        padding: 0.6rem;
    }

    .nav-controls {
        gap: 0.4rem;
    }

    .burger-icon {
        font-size: 1.2rem;
        padding: 3px 8px;
    }

    .theme-switch-label {
        font-size: 1rem;
        padding: 0.4rem;
    }

    .hero {
        padding: 2rem 1rem;
    }

    .catalog {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }

    .catalog-item {
        padding: 1.5rem 0.5rem;
    }

    .catalog-item span {
        font-size: 1rem;
    }

    .footer-container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .logo img {
        height: 30px;
    }
}

/* ==================== NEW STYLES FOR POST PAGE ==================== */

.post-page {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    width: 100%;
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem 1rem 4rem 1rem;
    transition: padding-top 0.3s ease;
}

.content-container {
    background-color: var(--surface-color);
    border-radius: var(--border-radius);
    padding: 2rem 2.5rem;
    border: 1px solid var(--border-color);
    line-height: 1.7;
}

.content-container h1 {
    font-size: 1.5rem;
    color: var(--accent-color);
    margin-bottom: 1rem;
    border-bottom: 2px solid var(--accent-color);
    padding-bottom: 0.5rem;
}

.content-container h2 {
    font-size: 1.2rem;
    color: var(--text-color);
    margin-top: 2rem;
    margin-bottom: 1rem;
}

.content-container h3 {
    font-size: 1.1rem;
    color: var(--text-color);
    margin-top: 1.5rem;
    margin-bottom: 0.8rem;
}

.content-container p {
    margin-bottom: 1.2rem;
    font-size: 1rem;
}

.content-container ul,
.content-container ol {
    margin: 1.5rem 0;
    padding-left: 2rem;
}

.content-container li {
    margin-bottom: 0.5rem;
}

.content-container blockquote {
    margin: 1.5rem 0;
    padding: 1rem 1.5rem;
    background-color: var(--bg-color);
    border-left: 5px solid var(--accent-color);
    font-style: italic;
    color: var(--text-color);
}

.content-container a {
    color: var(--accent-color);
    text-decoration: none;
    transition: color var(--transition-base), text-decoration var(--transition-base);
}

.content-container a:hover {
    color: var(--accent-hover-color);
    text-decoration: underline;
}

.content-container strong {
    color: var(--accent-color);
    font-weight: bold;
}

.related-links {
    margin-top: 2rem;
    padding: 1.5rem 2rem;
    background-color: var(--surface-color);
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
}

.related-links h3 {
    color: var(--accent-color);
    margin-bottom: 1rem;
    font-size: 1.2rem;
}

.related-links ul {
    list-style-type: '› ';
    padding-left: 1.5rem;
}

.related-links li {
    margin-bottom: 0.7rem;
}

.related-links a {
    color: var(--text-color);
    text-decoration: none;
    transition: color var(--transition-base);
}

.related-links a:hover {
    color: var(--accent-color);
    text-decoration: underline;
}

@media (max-width: 768px) {
    .post-page {
        padding: 1rem 0.5rem 3rem 0.5rem;
    }

    .content-container {
        padding: 1.5rem 1rem;
    }

    .content-container h1 {
        font-size: 1.5rem;
    }

    .content-container h2 {
        font-size: 1.2rem;
    }

    .content-container h3 {
        font-size: 1.1rem;
    }

    .content-container p {
        font-size: 1rem;
    }

    .related-links {
        padding: 1rem 1.5rem;
    }
}