/* Quantanian Static Site Styles */

:root {
    --primary-dark: #1f2937;
    --secondary-gray: #4b5563;
    --accent-blue: #2563eb;
    --accent-red: #dc2626;
    --text-dark: #111827;
    --text-light: #6b7280;
    --text-muted: #9ca3af;
    --bg-light: #f9fafb;
    --bg-white: #ffffff;
    --border-color: #e5e7eb;
    --hover-bg: #f3f4f6;
}

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

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

/* Header */
header {
    background: var(--primary-dark);
    color: white;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.header-top {
    padding: 1rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 1.3rem;
    font-weight: 700;
}

.logo-image {
    width: 40px;
    height: 40px;
    flex-shrink: 0;
}

.logo-image svg {
    width: 100%;
    height: 100%;
}

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.logo-main {
    font-size: 1.4rem;
    font-weight: 700;
    color: white;
}

.logo-tagline {
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.8);
    font-weight: 400;
}

/* Navigation */
nav {
    padding: 0.8rem 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

.nav-menu {
    display: flex !important;
    list-style: none !important;
    gap: 0.5rem;
    margin: 0 !important;
    padding: 0 !important;
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
    flex-direction: row !important;
    align-items: center;
}

.nav-menu::-webkit-scrollbar {
    display: none;
}

.nav-item {
    white-space: nowrap;
    margin: 0 !important;
    padding: 0 !important;
    display: inline-block !important;
}

.nav-link {
    display: flex !important;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1.2rem;
    text-decoration: none !important;
    color: rgba(255, 255, 255, 0.8) !important;
    border-radius: 4px;
    transition: all 0.3s ease;
    font-size: 0.9rem;
    font-weight: 500;
    border: none;
    background: none;
    white-space: nowrap;
}

.nav-link:hover {
    background: rgba(255, 255, 255, 0.1) !important;
    color: white !important;
    text-decoration: none !important;
}

.nav-link.active {
    background: var(--accent-blue) !important;
    color: white !important;
}

.nav-link i {
    font-size: 1rem;
    width: 16px;
    text-align: center;
    margin-right: 0.25rem;
}

/* Main Content */
.main-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1rem;
    min-height: calc(100vh - 200px);
}

.page-header {
    text-align: center;
    margin-bottom: 2rem;
}

.page-title {
    font-size: 2rem;
    color: var(--primary-dark);
    margin-bottom: 0.5rem;
}

.page-subtitle {
    color: var(--text-light);
    font-size: 1.1rem;
}

/* Topic List */
.topic-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.topic-item {
    background: var(--bg-white);
    border-radius: 0.1rem;
    overflow: hidden;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    border: 1px solid var(--border-color);
    transition: all 0.3s ease;
    width: 85%;
    max-width: 100%;
    margin: 0 auto;
}

.topic-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 2px rgba(0, 0, 0, 0.15);
}

/* Article Container */
.article-container {
    max-width: 800px;
    margin: 0 auto;
    background: var(--bg-white);
    border-radius: 0.5rem;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.article-header {
    background: var(--primary-dark);
    color: white;
    padding: 2rem;
    text-align: center;
}

.article-title {
    font-size: 2.2rem;
    margin-bottom: 0.5rem;
}

.article-meta {
    display: flex;
    justify-content: center;
    gap: 2rem;
    font-size: 0.9rem;
    flex-wrap: wrap;
}

.article-content {
    padding: 2rem;
    line-height: 1.8;
}

.back-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.8rem 1.5rem;
    background: var(--secondary-gray);
    color: white;
    text-decoration: none;
    border-radius: 0.5rem;
    font-weight: 600;
    margin-bottom: 2rem;
    transition: all 0.3s ease;
}

.back-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    color: white;
    text-decoration: none;
}

.category-badge {
    background: var(--accent-blue);
    color: white;
    padding: 0.2rem 0.6rem;
    border-radius: 0.25rem;
    font-size: 0.75rem;
    margin-right: 0.25rem;
    font-weight: 600;
}

.category-badge.research {
    background: var(--accent-red);
}

.category-badge.news {
    background: var(--secondary-gray);
}

.category-badge.superposition {
    background: var(--accent-blue);
}

/* Footer */
footer {
    background: var(--primary-dark);
    color: white;
    padding: 2rem 0;
    text-align: center;
    margin-top: 3rem;
}

/* Hide footer on article and page views */
.article-page footer,
.page-view footer {
    display: none;
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 1rem;
    }

    .logo {
        font-size: 1.2rem;
    }

    .logo-image {
        width: 30px;
        height: 30px;
    }

    .nav-menu {
        gap: 0.3rem !important;
        padding-bottom: 0.3rem;
        justify-content: center;
    }

    .nav-link {
        padding: 0.5rem 1rem !important;
        font-size: 0.85rem !important;
    }

    .main-container {
        padding: 1rem 0.5rem;
    }

    .page-title {
        font-size: 1.6rem;
    }

    .topic-item {
        width: 95%;
    }

    .article-header {
        padding: 1.5rem;
    }

    .article-title {
        font-size: 1.8rem;
    }

    .article-meta {
        flex-direction: column;
        gap: 0.5rem;
    }

    .article-content {
        padding: 1.5rem;
    }
}

@media (max-width: 480px) {
    .main-container {
        padding: 1rem 0.5rem;
    }

    .topic-item {
        width: 98%;
    }

    .article-content {
        padding: 1rem;
    }
}