/* Prism - News Bias Analysis */

/* Accessibility: skip link */
.visually-hidden-focusable {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}
.visually-hidden-focusable:focus {
    position: fixed;
    top: 0;
    left: 0;
    width: auto;
    height: auto;
    padding: 0.75rem 1.5rem;
    margin: 0;
    overflow: visible;
    clip: auto;
    white-space: normal;
    background: var(--color-primary);
    color: #fff;
    z-index: 9999;
    font-size: 1rem;
}

:root {
    --color-bg: #0f0f0f;
    --color-surface: #1a1a1a;
    --color-surface-hover: #252525;
    --color-border: #333;
    --color-text: #e5e5e5;
    --color-text-muted: #888;
    --color-primary: #6366f1;
    --color-primary-hover: #818cf8;
    --color-left: #3b82f6;
    --color-center: #8b5cf6;
    --color-right: #ef4444;
    --radius: 8px;
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.3);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
}

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

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

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

/* Navigation */
.navbar {
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.navbar-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
}

.navbar-nav {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.navbar-nav a {
    color: var(--color-text-muted);
    transition: color 0.2s;
}

.navbar-nav a:hover,
.navbar-nav a.active {
    color: var(--color-text);
}

.navbar-auth {
    margin-left: auto;
    gap: 1rem;
    align-items: center;
}
.nav-user {
    color: var(--color-text-muted);
    font-size: 0.85rem;
}
.btn-register {
    padding: 0.35rem 0.85rem;
    border: 1px solid var(--color-primary);
    border-radius: 6px;
    font-size: 0.85rem;
}
.btn-register:hover {
    background: var(--color-primary);
    color: #fff !important;
}

/* Auth Forms */
.auth-container {
    max-width: 400px;
    margin: 4rem auto;
    padding: 2rem;
}
.auth-container h1 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    text-align: center;
}
.auth-form .form-group {
    margin-bottom: 1rem;
}
.auth-form label {
    display: block;
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin-bottom: 0.35rem;
}
.auth-form input[type="text"],
.auth-form input[type="password"] {
    width: 100%;
    padding: 0.6rem 0.75rem;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: 6px;
    color: var(--color-text);
    font-size: 0.9rem;
}
.auth-form input:focus {
    outline: none;
    border-color: var(--color-primary);
}
.auth-form .btn-submit {
    width: 100%;
    padding: 0.65rem;
    background: var(--color-primary);
    color: #fff;
    border: none;
    border-radius: 6px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    margin-top: 0.5rem;
}
.auth-form .btn-submit:hover {
    opacity: 0.9;
}
.auth-form .form-footer {
    text-align: center;
    margin-top: 1rem;
    font-size: 0.85rem;
    color: var(--color-text-muted);
}
.auth-form .form-footer a {
    color: var(--color-primary);
}
.auth-form .errorlist {
    list-style: none;
    padding: 0;
    margin: 0.25rem 0 0;
    font-size: 0.8rem;
    color: #ef4444;
}
.auth-form .helptext {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    margin-top: 0.25rem;
    display: block;
}
.auth-form .helptext ul {
    padding-left: 1rem;
    margin: 0.25rem 0 0;
}

/* Hero Section */
.hero {
    min-height: 60vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 4rem 1rem;
}

.hero-content {
    max-width: 700px;
}

.hero h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-hover));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p {
    font-size: 1.25rem;
    color: var(--color-text-muted);
    margin-bottom: 2rem;
}

/* Search */
.search-container {
    position: relative;
    max-width: 600px;
    margin: 0 auto;
}

.search-input {
    width: 100%;
    padding: 1rem 1.5rem;
    font-size: 1.125rem;
    background: var(--color-surface);
    border: 2px solid var(--color-border);
    border-radius: var(--radius);
    color: var(--color-text);
    transition: border-color 0.2s;
}

.search-input:focus {
    outline: none;
    border-color: var(--color-primary);
}

.search-input::placeholder {
    color: var(--color-text-muted);
}

.search-results {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    margin-top: 0.5rem;
    box-shadow: var(--shadow);
    display: none;
}

.search-results:not(:empty) {
    display: block;
}

.search-result-item {
    display: block;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--color-border);
    cursor: pointer;
    transition: background 0.2s;
    text-decoration: none;
    color: var(--color-text);
    text-align: left;
}

.search-result-item:hover {
    color: var(--color-text);
}

.search-result-item strong {
    display: block;
    margin-bottom: 0.15rem;
    color: var(--color-primary);
}

.search-result-item p {
    margin: 0;
    font-size: 0.8rem;
}

.search-result-item:last-child {
    border-bottom: none;
}

.search-result-item:hover {
    background: var(--color-surface-hover);
}

/* Topic Grid */
.section-title {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--color-text);
}

.topic-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
    padding: 2rem 0;
}

.topic-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1.5rem;
    transition: transform 0.2s, box-shadow 0.2s;
    display: block;
    color: var(--color-text);
}

.topic-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow);
    color: var(--color-text);
}

.topic-card h3 {
    font-size: 1.125rem;
    margin-bottom: 0.75rem;
    line-height: 1.4;
}

.topic-meta {
    display: flex;
    gap: 1rem;
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

/* Article List */
.article-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.article-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1.25rem;
    display: flex;
    gap: 1rem;
    transition: background 0.2s;
}

.article-card:hover {
    background: var(--color-surface-hover);
}

.article-source {
    flex-shrink: 0;
    width: 80px;
    text-align: center;
}

.article-source-badge {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.bias-left { background: var(--color-left); color: white; }
.bias-center { background: var(--color-center); color: white; }
.bias-right { background: var(--color-right); color: white; }

.article-content {
    flex: 1;
}

.article-content h4 {
    font-size: 1rem;
    margin-bottom: 0.5rem;
}

.article-content p {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-meta {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    margin-top: 0.5rem;
}

/* Topic Detail */
.topic-header {
    padding: 3rem 0 2rem;
    border-bottom: 1px solid var(--color-border);
    margin-bottom: 2rem;
}

.topic-header h1 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.topic-stats {
    display: flex;
    gap: 2rem;
    margin-top: 1rem;
}

.stat-item {
    text-align: center;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
}

.stat-label {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
}

/* Source Grouping */
.source-group {
    margin-bottom: 2rem;
}

.source-group-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--color-border);
}

.source-group-header h3 {
    font-size: 1.125rem;
}

/* Loading */
.htmx-indicator {
    display: none;
}

.htmx-request .htmx-indicator {
    display: inline-block;
}

.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Footer */
.footer {
    padding: 2rem 0;
    margin-top: 4rem;
    border-top: 1px solid var(--color-border);
    text-align: center;
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

/* Utilities */
.text-muted { color: var(--color-text-muted); }
.text-center { text-align: center; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-4 { margin-top: 2rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-4 { margin-bottom: 2rem; }

/* Empty State */
.empty-state {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--color-text-muted);
}

.empty-state h3 {
    margin-bottom: 0.5rem;
    color: var(--color-text);
}

/* Hamburger menu toggle (hidden on desktop) */
.navbar-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--color-text);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.25rem;
    line-height: 1;
}

/* Responsive: Tablet and below */
@media (max-width: 768px) {
    .hero { min-height: 40vh; padding: 2rem 1rem; }
    .hero h1 { font-size: 1.75rem; }
    .hero p { font-size: 1rem; margin-bottom: 1.5rem; }
    .topic-grid { grid-template-columns: 1fr; }
    .topic-stats { flex-wrap: wrap; gap: 1rem; }
    .topic-header { padding: 2rem 0 1rem; }
    .topic-header h1 { font-size: 1.5rem; }
    .article-card { flex-direction: column; }
    .article-source { width: auto; text-align: left; }
    .section-title { font-size: 1.25rem; }
    .footer { margin-top: 2rem; }

    /* Mobile nav */
    .navbar-toggle { display: block; }
    .navbar-nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--color-surface);
        border-bottom: 1px solid var(--color-border);
        flex-direction: column;
        gap: 0;
        padding: 0.5rem 0;
    }
    .navbar-nav.open { display: flex; }
    .navbar-nav li a {
        display: block;
        padding: 0.75rem 1.5rem;
    }
    .navbar { position: relative; }
}

/* Responsive: Small phones */
@media (max-width: 480px) {
    .container { padding: 0 0.75rem; }
    .hero h1 { font-size: 1.5rem; }
    .search-input { font-size: 1rem; padding: 0.75rem 1rem; }
    .topic-card { padding: 1rem; }
    .stat-value { font-size: 1.25rem; }
}

/* Search result focus state for keyboard navigation */
.search-result-item.focused {
    background: var(--color-surface-hover);
    outline: 2px solid var(--color-primary);
    outline-offset: -2px;
}