/* 
 * Scinquiry Theme - Professional Scientific Publishing Platform
 * Main Stylesheet - Completely Redesigned
 */

/* ========================================
   CSS VARIABLES
   ======================================== */
:root {
    /* Beige Color Palette - From Scinquiry Logo (#cc8f25) */
    --color-primary: #cc8f25;
    --color-primary-light: #d9a747;
    --color-primary-dark: #b37a1f;
    --color-primary-lighter: #e6bf69;
    --color-primary-darker: #996619;
    --color-secondary: #10b981;
    --color-accent: #cc8f25;
    
    /* Neutrals */
    --color-gray-50: #f9fafb;
    --color-gray-100: #f3f4f6;
    --color-gray-200: #e5e7eb;
    --color-gray-300: #d1d5db;
    --color-gray-400: #9ca3af;
    --color-gray-500: #6b7280;
    --color-gray-600: #4b5563;
    --color-gray-700: #374151;
    --color-gray-800: #1f2937;
    --color-gray-900: #111827;
    
    /* Typography */
    --font-heading: 'Quicksand', -apple-system, sans-serif;
    --font-body: 'Quicksand', -apple-system, sans-serif;
    
    /* Spacing */
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --spacing-4xl: 6rem;
    
    /* Others */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-full: 9999px;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --transition: 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ========================================
   RESET
   ======================================== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-gray-900);
    background-color: #ffffff;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
    color: var(--color-gray-900);
}

h1 { font-size: 2.25rem; }
h2 { font-size: 1.875rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

p {
    margin-bottom: var(--spacing-md);
    color: var(--color-gray-700);
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition);
}

a:hover {
    color: var(--color-primary-dark);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* ========================================
   LAYOUT
   ======================================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* ========================================
   BUTTONS
   ======================================== */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    font-family: var(--font-body);
    text-align: center;
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
    line-height: 1;
}

.btn-primary {
    background-color: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

.btn-primary:hover {
    background-color: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background-color: var(--color-secondary);
    color: white;
}

.btn-outline {
    background-color: transparent;
    border: 2px solid var(--color-primary);
    color: var(--color-primary);
}

.btn-outline:hover {
    background-color: var(--color-primary);
    color: white;
}

.btn-text {
    background-color: transparent;
    padding: 0;
    color: var(--color-primary);
    font-weight: 600;
    border: none;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

.btn-block {
    display: block;
    width: 100%;
}

/* ========================================
   HEADER
   ======================================== */
.site-header {
    background-color: white;
    border-bottom: 1px solid var(--color-gray-200);
    padding: 1.25rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
}

.header-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-xl);
}

.site-branding {
    flex-shrink: 0;
}

.site-title {
    margin: 0;
    font-size: 1.5rem;
    font-weight: 900;
}

.site-title a {
    color: var(--color-primary);
}

.main-navigation {
    flex-grow: 1;
    display: flex;
    justify-content: center;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
    margin: 0;
    padding: 0;
}

.nav-item a {
    color: var(--color-gray-700);
    font-weight: 500;
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius-sm);
    transition: all var(--transition);
}

.nav-item a:hover {
    color: var(--color-primary);
    background-color: var(--color-gray-100);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.auth-links {
    display: flex;
    gap: var(--spacing-sm);
}

.mobile-menu-toggle {
    display: none;
}

/* ========================================
   HERO SECTION
   ======================================== */
.hero-section {
    background: linear-gradient(135deg, #faf7f0 0%, #f5eee0 100%);
    padding: 80px 0;
    text-align: center;
    position: relative;
}

.hero-content {
    max-width: 1000px;
    margin: 0 auto;
}

.hero-title {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    color: var(--color-gray-900);
    font-weight: 900;
    line-height: 1.1;
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 3rem;
    color: var(--color-gray-700);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.hero-search {
    max-width: 700px;
    margin: 0 auto 2rem;
}

.search-form-large {
    display: flex;
    gap: 0.5rem;
    background: white;
    padding: 0.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
}

.search-field-large {
    flex: 1;
    padding: 1rem 1.5rem;
    border: none;
    font-size: 1.125rem;
    outline: none;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* ========================================
   CONTENT CATEGORIES
   ======================================== */
.content-categories {
    padding: var(--spacing-4xl) 0;
    background-color: #f8f9fa;
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

.category-card {
    background: white;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transition: all var(--transition);
    display: flex;
    flex-direction: column;
}

.category-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.15);
}

.category-header {
    padding: var(--spacing-xl);
    color: white;
    min-height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.category-header h3 {
    font-size: 1.5rem;
    margin: 0;
    color: white;
    font-weight: 700;
}

.category-body {
    padding: var(--spacing-xl);
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.category-body p {
    color: var(--color-gray-700);
    margin-bottom: var(--spacing-lg);
    line-height: 1.7;
    flex-grow: 1;
    font-size: 0.95rem;
}

.category-link {
    color: var(--color-primary);
    font-weight: 600;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: all var(--transition);
}

.category-link:hover {
    gap: 0.75rem;
    color: var(--color-primary-dark);
}

.category-link i {
    transition: transform var(--transition);
}

.category-link:hover i {
    transform: translateX(4px);
}

/* Card Color Variants - All using beige shades from logo (#cc8f25) */
.card-teal .category-header {
    background: linear-gradient(135deg, #d9a747 0%, #cc8f25 100%);
}

.card-coral .category-header {
    background: linear-gradient(135deg, #cc8f25 0%, #b37a1f 100%);
}

.card-lime .category-header {
    background: linear-gradient(135deg, #e6bf69 0%, #d9a747 100%);
}

.card-purple .category-header {
    background: linear-gradient(135deg, #b37a1f 0%, #996619 100%);
}

.card-dark-teal .category-header {
    background: linear-gradient(135deg, #cc8f25 0%, #996619 100%);
}

/* ========================================
   LATEST CONTENT SECTIONS
   ======================================== */
.latest-content-section {
    padding: var(--spacing-4xl) 0;
    background-color: white;
}

.latest-content-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
    gap: var(--spacing-2xl);
}

.latest-content-box {
    border: 2px solid var(--color-primary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-2xl);
    background-color: white;
}

.content-box-title {
    color: var(--color-primary);
    font-size: 1.5rem;
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--color-primary);
}

.content-list-item {
    padding: var(--spacing-lg) 0;
    border-bottom: 1px solid var(--color-gray-200);
}

.content-list-item:last-child {
    border-bottom: none;
}

.content-date {
    display: block;
    font-size: 0.875rem;
    color: var(--color-gray-500);
    margin-bottom: 0.5rem;
}

.content-item-title {
    font-size: 1rem;
    margin-bottom: 0.5rem;
    line-height: 1.5;
}

.content-item-title a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition);
}

.content-item-title a:hover {
    color: var(--color-primary-dark);
    text-decoration: underline;
}

.content-authors {
    font-size: 0.875rem;
    color: var(--color-gray-600);
    margin: 0;
}

/* ========================================
   SECTIONS
   ======================================== */
.featured-research,
.browse-subjects,
.latest-news,
.statistics-section,
.cta-section {
    padding: var(--spacing-4xl) 0;
}

.featured-research,
.latest-news {
    background-color: var(--color-gray-50);
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-2xl);
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.section-title {
    font-size: 1.875rem;
    margin: 0;
}

/* ========================================
   ARTICLES GRID
   ======================================== */
.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--spacing-xl);
}

.article-card {
    background: white;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition);
    display: flex;
    flex-direction: column;
}

.article-card:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-4px);
}

.article-thumbnail {
    height: 200px;
    overflow: hidden;
}

.article-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.article-content {
    padding: var(--spacing-lg);
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.article-subject {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background-color: var(--color-primary);
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    margin-bottom: var(--spacing-md);
    text-transform: uppercase;
}

.article-title {
    font-size: 1.125rem;
    margin-bottom: 0.5rem;
    line-height: 1.4;
}

.article-title a {
    color: var(--color-gray-900);
}

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

.article-authors {
    font-size: 0.875rem;
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-md);
}

.article-excerpt {
    color: var(--color-gray-600);
    font-size: 0.875rem;
    line-height: 1.6;
    margin-bottom: var(--spacing-lg);
    flex-grow: 1;
}

.article-meta {
    display: flex;
    gap: var(--spacing-md);
    font-size: 0.75rem;
    color: var(--color-gray-500);
    margin-bottom: var(--spacing-md);
}

/* ========================================
   STATISTICS
   ======================================== */
.statistics-section {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: white;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-2xl);
    text-align: center;
}

.stat-number {
    font-size: 3rem;
    font-weight: 900;
    margin-bottom: 0.5rem;
    color: white;
}

.stat-label {
    font-size: 1.125rem;
    color: rgba(255, 255, 255, 0.9);
}

/* ========================================
   SUBJECTS & NEWS
   ======================================== */
.subjects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

.subject-card {
    padding: var(--spacing-lg);
    background: white;
    border: 2px solid var(--color-gray-200);
    border-radius: var(--radius-md);
    text-align: center;
    transition: all var(--transition);
}

.subject-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-xl);
}

.news-card {
    background: white;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition);
}

.news-card:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-4px);
}

.news-thumbnail {
    height: 200px;
    overflow: hidden;
}

.news-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.news-content {
    padding: var(--spacing-lg);
}

.news-meta {
    font-size: 0.875rem;
    color: var(--color-gray-500);
    margin-bottom: 0.5rem;
}

.news-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-md);
}

.news-title a {
    color: var(--color-gray-900);
}

.news-excerpt {
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-lg);
}

/* ========================================
   CTA SECTION
   ======================================== */
.cta-section {
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    text-align: center;
}

.cta-content h2 {
    font-size: 2.25rem;
    margin-bottom: var(--spacing-md);
}

.cta-content p {
    font-size: 1.125rem;
    color: var(--color-gray-600);
    margin-bottom: var(--spacing-2xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* ========================================
   FOOTER
   ======================================== */
.site-footer {
    background-color: var(--color-gray-900);
    color: var(--color-gray-300);
    padding: var(--spacing-4xl) 0 var(--spacing-lg);
    margin-top: var(--spacing-4xl);
}

.footer-widgets-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-3xl);
}

.footer-widget-area h3,
.footer-widget-area h4 {
    color: white;
    margin-bottom: var(--spacing-md);
}

.footer-bottom {
    border-top: 1px solid var(--color-gray-700);
    padding-top: var(--spacing-lg);
}

.footer-bottom-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.copyright {
    color: var(--color-gray-400);
    font-size: 0.875rem;
}

.footer-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
    margin: 0;
    padding: 0;
}

.social-links {
    display: flex;
    gap: var(--spacing-md);
}

.social-link {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-gray-800);
    border-radius: var(--radius-full);
    color: var(--color-gray-300);
    transition: all var(--transition);
}

.social-link:hover {
    background-color: var(--color-primary);
    color: white;
}

/* ========================================
   BACK TO TOP
   ======================================== */
#back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    background-color: var(--color-primary);
    color: white;
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    display: none;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    z-index: 999;
}

#back-to-top:hover {
    background-color: var(--color-primary-dark);
}

/* ========================================
   ACCESSIBILITY
   ======================================== */
.skip-to-content {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--color-primary);
    color: white;
    padding: 8px;
    text-decoration: none;
    z-index: 100;
}

.skip-to-content:focus {
    top: 0;
}

/* ========================================
   RESPONSIVE
   ======================================== */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 2.5rem;
    }
}

@media (max-width: 768px) {
    .main-navigation {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: flex;
        flex-direction: column;
        gap: 4px;
        background: none;
        border: none;
        cursor: pointer;
        padding: 0.5rem;
    }
    
    .mobile-menu-toggle span {
        display: block;
        width: 24px;
        height: 2px;
        background-color: var(--color-gray-700);
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .categories-grid {
        grid-template-columns: 1fr;
    }
}

/* ========================================
   UTILITIES
   ======================================== */
.text-center { text-align: center; }
.hidden { display: none; }