/* ==========================================================================
   PollsCafe Main Stylesheet
   YouGov-inspired design with clean, professional aesthetics
   ========================================================================== */

/* ==========================================================================
   CSS Custom Properties (Variables)
   ========================================================================== */
:root {
    /* Primary Colors - YouGov-inspired blue palette */
    --primary-color: #0066CC;
    --primary-dark: #004C99;
    --primary-light: #3385D6;
    
    /* Secondary Colors */
    --secondary-color: #28A745;
    --secondary-dark: #1E7E34;
    
    /* Neutral Colors */
    --text-dark: #212529;
    --text-muted: #6C757D;
    --text-light: #ADB5BD;
    --bg-light: #F8F9FA;
    --bg-white: #FFFFFF;
    --border-color: #DEE2E6;
    
    /* Accent Colors */
    --accent-political: #0066CC;
    --accent-cultural: #28A745;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 8px 25px rgba(0, 102, 204, 0.15);
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s ease;
    --transition-slow: 0.35s ease;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
}

/* ==========================================================================
   Base Styles
   ========================================================================== */
body {
    font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    color: var(--text-dark);
    background-color: var(--bg-light);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

/* ==========================================================================
   Navigation Bar - Modern White Style (Compact)
   ========================================================================== */
.navbar {
    background-color: var(--bg-white) !important;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
    padding: var(--spacing-sm) 0;
    position: sticky;
    top: 0;
    z-index: 1030;
    transition: padding var(--transition-normal), box-shadow var(--transition-normal);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

/* Shrunk navbar state when scrolling */
.navbar.navbar-shrunk {
    padding: 0.15rem 0;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.navbar.navbar-shrunk .navbar-logo {
    height: 18px;
}

.navbar.navbar-shrunk .nav-link {
    padding-top: 0.2rem;
    padding-bottom: 0.2rem;
    font-size: 0.8rem;
}

/* Navbar logo styling */
.navbar-logo {
    height: 24px;
    width: auto;
    transition: height var(--transition-normal);
}

.navbar-brand {
    padding: 0;
    transition: opacity var(--transition-fast);
}

.navbar-brand:hover {
    opacity: 0.8;
}

/* Navigation links - modern dark text on white (compact) */
.navbar .nav-link {
    color: var(--text-dark) !important;
    font-weight: 500;
    font-size: 0.85rem;
    padding: 0.3rem 0.75rem;
    border-radius: var(--radius-sm);
    transition: color var(--transition-fast), background-color var(--transition-fast);
    position: relative;
}

.navbar .nav-link:hover {
    color: var(--primary-color) !important;
    background-color: rgba(0, 102, 204, 0.05);
}

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

.navbar .nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 16px;
    height: 2px;
    background-color: var(--primary-color);
    border-radius: 1px;
}

/* Dropdown styling */
.navbar .dropdown-toggle::after {
    margin-left: 0.3rem;
    vertical-align: 0.1em;
}

.navbar .dropdown-menu {
    border: none;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    border-radius: var(--radius-md);
    padding: 0.5rem 0;
    margin-top: 0.5rem;
}

.navbar .dropdown-item {
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
    color: var(--text-dark);
    transition: background-color var(--transition-fast);
}

.navbar .dropdown-item:hover {
    background-color: rgba(0, 102, 204, 0.05);
    color: var(--primary-color);
}

/* Mobile navbar toggler */
.navbar-toggler {
    border: 1px solid rgba(0, 0, 0, 0.1);
    padding: 0.4rem 0.6rem;
}

.navbar-toggler:focus {
    box-shadow: none;
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

.navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%2833, 37, 41, 0.75%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

/* Mobile menu styling */
@media (max-width: 991.98px) {
    .navbar-collapse {
        background-color: var(--bg-white);
        padding: var(--spacing-md);
        margin-top: var(--spacing-sm);
        border-radius: var(--radius-md);
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    }
    
    .navbar .nav-link {
        padding: 0.75rem 1rem;
    }
    
    .navbar .nav-link.active::after {
        display: none;
    }
}

/* Search Form in Navbar */
.navbar .form-control {
    background-color: var(--bg-light);
    border: 1px solid var(--border-color);
    color: var(--text-dark);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm) var(--spacing-md);
    transition: all var(--transition-fast);
}

.navbar .form-control::placeholder {
    color: rgba(255, 255, 255, 0.7);
}

.navbar .form-control:focus {
    background-color: rgba(255, 255, 255, 0.25);
    border-color: rgba(255, 255, 255, 0.4);
    box-shadow: 0 0 0 0.2rem rgba(255, 255, 255, 0.15);
    color: var(--bg-white);
}

.navbar .btn-outline-light {
    border-width: 2px;
    font-weight: 500;
    transition: all var(--transition-fast);
}

.navbar .btn-outline-light:hover {
    background-color: var(--bg-white);
    color: var(--primary-color);
    transform: translateY(-1px);
}

/* Navbar Toggler (Hamburger Menu) */
.navbar-toggler {
    border: 2px solid rgba(255, 255, 255, 0.5);
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.navbar-toggler:focus {
    box-shadow: 0 0 0 0.2rem rgba(255, 255, 255, 0.25);
}

.navbar-toggler:hover {
    border-color: rgba(255, 255, 255, 0.8);
}

.navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba%28255, 255, 255, 0.9%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

/* ==========================================================================
   Featured Article
   ========================================================================== */
.featured-article {
    background: var(--bg-white);
    border: none;
    border-left: 5px solid var(--primary-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-normal);
    overflow: hidden;
}

.featured-article:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
    border-left-color: var(--primary-dark);
}

.featured-article .card-body {
    padding: var(--spacing-xl);
}

.featured-article .card-title {
    line-height: 1.3;
    margin-bottom: var(--spacing-md);
}

.featured-article .card-title a {
    color: var(--text-dark);
    transition: color var(--transition-fast);
}

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

.featured-article .card-text {
    color: var(--text-muted);
    font-size: 1.1rem;
    line-height: 1.7;
}

.featured-article .badge {
    font-size: 0.85rem;
    font-weight: 600;
    padding: var(--spacing-sm) var(--spacing-md);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.featured-article .btn-primary {
    padding: var(--spacing-sm) var(--spacing-lg);
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.featured-article .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* ==========================================================================
   Article Cards
   ========================================================================== */
.article-card {
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    transition: all var(--transition-normal);
    overflow: hidden;
}

.article-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
    border-color: var(--primary-light);
}

.article-card .card-body {
    padding: var(--spacing-lg);
}

.article-card .card-title {
    font-size: 1.15rem;
    font-weight: 600;
    line-height: 1.4;
    margin-bottom: var(--spacing-sm);
}

.article-card .card-title a {
    color: var(--text-dark);
    transition: color var(--transition-fast);
}

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

.article-card .card-text {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
}

.article-card .badge {
    font-size: 0.75rem;
    font-weight: 600;
    padding: var(--spacing-xs) var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.article-card .btn-outline-primary {
    font-weight: 500;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.article-card .btn-outline-primary:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

/* ==========================================================================
   Category Badges
   ========================================================================== */
.badge.bg-primary {
    background-color: var(--accent-political) !important;
}

.badge.bg-success {
    background-color: var(--accent-cultural) !important;
}

/* ==========================================================================
   Page Headers
   ========================================================================== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    color: var(--text-dark);
}

.page-header {
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--border-color);
}

/* ==========================================================================
   Flash Messages
   ========================================================================== */
.alert {
    border: none;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    animation: slideIn 0.3s ease-out;
}

.alert-success {
    background-color: #D4EDDA;
    color: #155724;
    border-left: 4px solid var(--secondary-color);
}

.alert-danger {
    background-color: #F8D7DA;
    color: #721C24;
    border-left: 4px solid #DC3545;
}

.alert-info {
    background-color: #D1ECF1;
    color: #0C5460;
    border-left: 4px solid #17A2B8;
}

.alert-warning {
    background-color: #FFF3CD;
    color: #856404;
    border-left: 4px solid #FFC107;
}

@keyframes slideIn {
    from {
        transform: translateY(-20px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
    font-weight: 500;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

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

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

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

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

/* ==========================================================================
   Footer
   ========================================================================== */
footer {
    background-color: var(--bg-white);
    border-top: 1px solid var(--border-color);
}

footer p {
    margin-bottom: 0;
    color: var(--text-muted);
}

/* ==========================================================================
   Search Results Page
   ========================================================================== */
.search-results-header {
    background-color: var(--bg-white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--shadow-sm);
}

.search-query {
    color: var(--primary-color);
    font-weight: 600;
}

/* ==========================================================================
   Article Detail Page
   ========================================================================== */
.article-content {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-dark);
}

.article-content p {
    margin-bottom: var(--spacing-lg);
}

.breadcrumb {
    background-color: transparent;
    padding: 0;
    margin-bottom: var(--spacing-lg);
}

.breadcrumb-item a {
    color: var(--primary-color);
}

.breadcrumb-item.active {
    color: var(--text-muted);
}

/* Poll Data Display */
.poll-results {
    background-color: var(--bg-light);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    font-family: 'Monaco', 'Consolas', monospace;
    font-size: 0.9rem;
    overflow-x: auto;
}

/* ==========================================================================
   Responsive Design - Tablet (768px and below)
   ========================================================================== */
@media (max-width: 991.98px) {
    .navbar .d-flex {
        margin-top: var(--spacing-md);
        width: 100%;
    }
    
    .navbar .form-control {
        flex: 1;
    }
}

@media (max-width: 768px) {
    /* Featured Article - Tablet */
    .featured-article .display-5 {
        font-size: 1.75rem;
    }
    
    .featured-article .card-body {
        padding: var(--spacing-lg);
    }
    
    .featured-article .card-text {
        font-size: 1rem;
    }
    
    /* Article Cards - Stack vertically */
    .article-card .card-body {
        padding: var(--spacing-md);
    }
    
    .article-card .card-title {
        font-size: 1.1rem;
    }
    
    /* Page headers */
    h1 {
        font-size: 1.75rem;
    }
    
    h3 {
        font-size: 1.25rem;
    }
}

/* ==========================================================================
   Responsive Design - Mobile (576px and below)
   ========================================================================== */
@media (max-width: 576px) {
    /* Navigation - Mobile */
    .navbar {
        padding: var(--spacing-sm);
    }
    
    .navbar-logo {
        height: 32px;
    }
    
    .navbar .d-flex {
        flex-direction: column;
        gap: var(--spacing-sm);
        margin-top: var(--spacing-md);
        padding-top: var(--spacing-md);
        border-top: 1px solid rgba(255, 255, 255, 0.2);
    }
    
    .navbar .form-control {
        width: 100%;
    }
    
    .navbar .btn-outline-light {
        width: 100%;
    }
    
    .navbar .btn-outline-light.ms-2 {
        margin-left: 0 !important;
        margin-top: var(--spacing-sm);
    }
    
    /* Featured Article - Mobile */
    .featured-article {
        border-left-width: 4px;
    }
    
    .featured-article .display-5 {
        font-size: 1.5rem;
    }
    
    .featured-article .card-body {
        padding: var(--spacing-md);
    }
    
    .featured-article .card-text {
        font-size: 0.95rem;
    }
    
    .featured-article .btn-primary {
        width: 100%;
        padding: var(--spacing-md);
    }
    
    /* Article Cards - Mobile */
    .article-card {
        margin-bottom: var(--spacing-md);
    }
    
    .article-card .card-body {
        padding: var(--spacing-md);
    }
    
    .article-card .card-title {
        font-size: 1rem;
    }
    
    .article-card .card-text {
        font-size: 0.9rem;
    }
    
    .article-card .btn-outline-primary {
        width: 100%;
        padding: var(--spacing-sm) var(--spacing-md);
    }
    
    /* Page headers - Mobile */
    h1 {
        font-size: 1.5rem;
    }
    
    h3 {
        font-size: 1.15rem;
    }
    
    /* Main container padding */
    main.container {
        padding-left: var(--spacing-md);
        padding-right: var(--spacing-md);
    }
    
    /* Footer - Mobile */
    footer {
        padding: var(--spacing-lg) var(--spacing-md);
    }
    
    footer p {
        font-size: 0.9rem;
    }
    
    /* Article detail - Mobile */
    .article-content {
        font-size: 1rem;
        line-height: 1.7;
    }
    
    /* Alerts - Mobile */
    .alert {
        font-size: 0.9rem;
        padding: var(--spacing-md);
    }
}

/* ==========================================================================
   Print Styles
   ========================================================================== */
@media print {
    .navbar,
    footer,
    .btn,
    .alert {
        display: none !important;
    }
    
    body {
        background: white;
        color: black;
    }
    
    .article-content {
        font-size: 12pt;
    }
}

/* ==========================================================================
   Accessibility Enhancements
   ========================================================================== */
/* Focus states for keyboard navigation */
a:focus,
button:focus,
input:focus,
.btn:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* Skip link for screen readers */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--primary-color);
    color: white;
    padding: var(--spacing-sm) var(--spacing-md);
    z-index: 9999;
    transition: top var(--transition-fast);
}

.skip-link:focus {
    top: 0;
}

/* Reduced motion preference */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --primary-color: #0052A3;
        --border-color: #000000;
    }
    
    .article-card,
    .featured-article {
        border-width: 2px;
    }
}


/* ==========================================================================
   Article Rich Content - Hero Images and Content Blocks
   ========================================================================== */

/* Hero Image Container */
.hero-image-container {
    width: 100%;
    max-width: 1220px;
    margin: 0 auto var(--spacing-xl);
    overflow: hidden;
    border-radius: var(--radius-lg);
}

.hero-image {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
}

/* Responsive hero image - scales proportionally below 1220px */
@media (max-width: 1220px) {
    .hero-image-container {
        max-width: 100%;
        border-radius: var(--radius-md);
    }
}

@media (max-width: 768px) {
    .hero-image-container {
        margin-bottom: var(--spacing-lg);
        border-radius: var(--radius-sm);
    }
}

/* Article Paragraph Blocks */
.article-paragraph {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--text-dark);
    margin-bottom: var(--spacing-lg);
}

@media (max-width: 576px) {
    .article-paragraph {
        font-size: 1rem;
        line-height: 1.7;
    }
}

/* Article Section Header Blocks */
.article-section-header {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--primary-color);
}

@media (max-width: 768px) {
    .article-section-header {
        font-size: 1.35rem;
    }
}

@media (max-width: 576px) {
    .article-section-header {
        font-size: 1.25rem;
        margin-top: var(--spacing-lg);
    }
}

/* Article Image Blocks */
.article-image {
    margin: var(--spacing-xl) 0;
    text-align: center;
}

.article-image img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
}

.article-image figcaption {
    margin-top: var(--spacing-sm);
    font-size: 0.9rem;
    color: var(--text-muted);
    font-style: italic;
    text-align: center;
}

@media (max-width: 576px) {
    .article-image {
        margin: var(--spacing-lg) 0;
    }
    
    .article-image figcaption {
        font-size: 0.85rem;
    }
}

/* Article Iframe/Embed Blocks */
.article-iframe-container {
    margin: var(--spacing-xl) 0;
    width: 100%;
    position: relative;
}

.article-iframe {
    display: block;
    width: 100%;
    border: none;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    background-color: #fff;
}

@media (max-width: 576px) {
    .article-iframe-container {
        margin: var(--spacing-lg) 0;
    }
}