/* ==========================================================================
   DIRA Articles & Insights - UI Architecture & Style Specification
   ========================================================================== */

:root {
    /* Design Tokens */
    --color-primary-accent: #2F80ED;
    --color-primary-hover: #1A62BF;
    --color-badge-bg: #FEF08A;
    --color-badge-text: #713F12;
    --color-page-bg: #FFFFFF;
    --color-section-bg: #F9F9FC;
    --color-card-bg: #FFFFFF;
    --color-text-primary: #111827;
    --color-text-secondary: #6B7280;
    --color-text-muted: #9CA3AF;
    --color-border-subtle: #E5E7EB;
    --color-border-hover: #CBD5E1;
    --color-error: #EF4444;
    --color-success: #10B981;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

body {
    background-color: var(--color-page-bg);
    color: var(--color-text-primary);
    font-family: var(--font-sans);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.articles-page-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px 24px 80px;
}

/* ==========================================================================
   Section 1: Hero Header & Capsule Newsletter Capture
   ========================================================================== */

.articles-hero-section {
    text-align: center;
    max-width: 760px;
    margin: 40px auto 48px;
    padding: 0 16px;
}

/* Eyebrow Badge */
.eyebrow-badge {
    display: inline-block;
    background-color: var(--color-badge-bg);
    color: var(--color-badge-text);
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.5px;
    padding: 5px 16px;
    border-radius: 9999px;
    margin-bottom: 16px;
    text-transform: uppercase;
}

/* Main Headline */
.articles-hero-title {
    font-size: clamp(32px, 4vw, 46px);
    font-weight: 800;
    color: var(--color-text-primary);
    letter-spacing: -0.025em;
    line-height: 1.15;
    margin-bottom: 12px;
}

/* Subtitle */
.articles-hero-subtitle {
    font-size: 15px;
    color: var(--color-text-secondary);
    line-height: 1.65;
    max-width: 580px;
    margin: 0 auto 32px;
}

/* Enclosed Capsule Form */
.hero-capsule-form {
    display: flex;
    align-items: center;
    max-width: 460px;
    margin: 0 auto;
    padding: 5px 6px 5px 18px;
    border-radius: 9999px;
    border: 1px solid var(--color-border-subtle);
    background-color: #FFFFFF;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.04);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.hero-capsule-form:focus-within {
    border-color: var(--color-primary-accent);
    box-shadow: 0 0 0 3px rgba(47, 128, 237, 0.15);
}

.capsule-input {
    flex: 1;
    min-width: 0;
    padding: 8px 4px;
    font-size: 14px;
    font-family: inherit;
    background: transparent;
    border: none;
    outline: none;
    color: var(--color-text-primary);
}

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

.capsule-button {
    padding: 10px 24px;
    border-radius: 9999px;
    background-color: var(--color-primary-accent);
    color: #FFFFFF;
    font-size: 14px;
    font-weight: 600;
    border: none;
    cursor: pointer;
    white-space: nowrap;
    transition: background-color 0.2s ease, transform 0.1s ease;
}

.capsule-button:hover {
    background-color: var(--color-primary-hover);
}

.capsule-button:active {
    transform: scale(0.98);
}

.hero-newsletter-status {
    margin-top: 14px;
    font-size: 13.5px;
    font-weight: 500;
    display: none;
}

.hero-newsletter-status.show {
    display: block;
}

.hero-newsletter-status.success {
    color: var(--color-success);
}

.hero-newsletter-status.error {
    color: var(--color-error);
}

/* ==========================================================================
   Section 2: Filter Navigation / Segmented Tabs & Search
   ========================================================================== */

.articles-nav-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 20px;
    padding: 8px 0 20px;
    border-bottom: 1px solid var(--color-border-subtle);
    margin-bottom: 40px;
}

.articles-nav-tabs {
    max-width: 100%;
    min-width: 0;
    display: flex;
    align-items: center;
    gap: 28px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    padding-bottom: 4px;
}

.articles-nav-tabs::-webkit-scrollbar {
    display: none;
}

.category-filter-tab {
    background: none;
    border: none;
    font-size: 14.5px;
    font-weight: 500;
    color: var(--color-text-secondary);
    padding: 8px 0;
    cursor: pointer;
    position: relative;
    white-space: nowrap;
    transition: color 0.2s ease;
    font-family: inherit;
}

.category-filter-tab:hover {
    color: var(--color-text-primary);
}

.category-filter-tab.active {
    color: var(--color-primary-accent);
    font-weight: 600;
}

.category-filter-tab.active::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    right: 0;
    height: 2.5px;
    background-color: var(--color-primary-accent);
    border-radius: 2px;
}

/* Search Box */
.articles-search-capsule {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 7px 16px;
    border: 1px solid var(--color-border-subtle);
    border-radius: 9999px;
    background-color: #FFFFFF;
    color: var(--color-text-secondary);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
    min-width: 220px;
}

.articles-search-capsule:focus-within {
    border-color: var(--color-primary-accent);
    box-shadow: 0 0 0 3px rgba(47, 128, 237, 0.12);
}

.articles-search-capsule svg {
    color: var(--color-text-muted);
    flex-shrink: 0;
}

.articles-search-capsule input {
    width: 100%;
    border: none;
    outline: none;
    font-size: 13.5px;
    color: var(--color-text-primary);
    background: transparent;
    font-family: inherit;
}

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

/* ==========================================================================
   Section 3: Content Grid & Article Cards
   ========================================================================== */

.articles-grid {
    display: grid;
    grid-template-columns: repeat(1, minmax(0, 1fr));
    gap: 32px;
    margin-bottom: 70px;
}

.article-card {
    display: flex;
    flex-direction: row;
    align-items: center;
    background-color: var(--color-card-bg);
    border: 1px solid var(--color-border-subtle);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.03);
    transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.article-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.06);
    border-color: var(--color-border-hover);
}

.article-img-wrap {
    position: relative;
    width: 35%;
    aspect-ratio: 16 / 10;
    overflow: hidden;
    background-color: #F3F4F6;
}

.article-img-wrap img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.article-card:hover .article-img-wrap img {
    transform: scale(1.04);
}

.article-card-badge {
    position: absolute;
    top: 12px;
    left: 12px;
    background-color: var(--color-badge-bg);
    color: var(--color-badge-text);
    font-size: 11px;
    font-weight: 700;
    padding: 4px 10px;
    border-radius: 9999px;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.08);
    letter-spacing: 0.3px;
    text-transform: uppercase;
}

.article-card-body {
    padding: 22px 24px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
    width: 65%
}

.article-card-meta {
    font-size: 12.5px;
    color: var(--color-text-muted);
    display: flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 10px;
    font-weight: 500;
}

.article-card-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--color-text-primary);
    line-height: 1.35;
    margin-bottom: 10px;
    letter-spacing: -0.01em;
}

.article-card-title a {
    color: var(--color-text-primary);
    text-decoration: none;
    transition: color 0.2s ease;
}

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

.article-card-excerpt {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: 18px;
    flex-grow: 1;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-card-footer {
    margin-top: auto;
    padding-top: 12px;
}

.article-action-link {
    color: var(--color-primary-accent);
    font-size: 14px;
    font-weight: 600;
    text-decoration: underline;
    text-underline-offset: 4px;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    transition: color 0.2s ease, gap 0.2s ease;
}

.article-action-link:hover {
    color: var(--color-primary-hover);
    gap: 8px;
}

.article-not-found {
    grid-column: 1 / -1;
    text-align: center;
    padding: 60px 20px;
    background-color: var(--color-section-bg);
    border: 1px dashed var(--color-border-subtle);
    border-radius: 16px;
    color: var(--color-text-secondary);
    font-size: 15px;
}

/* ==========================================================================
   Section 4: Reader Page (article.html) Modern Styles
   ========================================================================== */

.article-reader-page {
    max-width: 860px;
    margin: 0 auto;
    padding: 40px 20px 80px;
}

.article-back-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--color-primary-accent);
    font-weight: 600;
    font-size: 14px;
    text-decoration: none;
    margin-bottom: 25px;
    transition: color 0.2s ease, transform 0.2s ease;
}

.article-back-link:hover {
    color: var(--color-primary-hover);
    transform: translateX(-3px);
}

.article-reader {
    background-color: #FFFFFF;
    border: 1px solid var(--color-border-subtle);
    border-radius: 16px;
    padding: 45px 50px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
}

.reader-header {
    margin-bottom: 25px;
}

.reader-badge {
    display: inline-block;
    background-color: var(--color-badge-bg);
    color: var(--color-badge-text);
    font-size: 12px;
    font-weight: 700;
    padding: 5px 14px;
    border-radius: 9999px;
    margin-bottom: 15px;
    text-transform: uppercase;
}

.reader-header h1 {
    font-size: clamp(28px, 3.5vw, 38px);
    font-weight: 800;
    color: var(--color-text-primary);
    line-height: 1.25;
    margin-bottom: 14px;
    letter-spacing: -0.02em;
}

.reader-meta {
    font-size: 13.5px;
    color: var(--color-text-muted);
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--color-border-subtle);
    margin-bottom: 30px;
}

.reader-featured-img {
    width: 100%;
    max-height: 420px;
    border-radius: 12px;
    overflow: hidden;
    margin-bottom: 35px;
    background-color: #F3F4F6;
}

.reader-featured-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.reader-prose {
    font-size: 16.5px;
    line-height: 1.8;
    color: #374151;
}

.reader-prose p {
    margin-bottom: 22px;
}

.reader-prose h2, .reader-prose h3 {
    color: var(--color-text-primary);
    font-weight: 700;
    margin: 35px 0 16px;
    line-height: 1.3;
}

.reader-prose h2 { font-size: 24px; }
.reader-prose h3 { font-size: 20px; }

.reader-prose ul, .reader-prose ol {
    margin: 15px 0 25px 25px;
    line-height: 1.75;
}

.reader-prose li {
    margin-bottom: 8px;
}

.reader-prose blockquote {
    border-left: 3px solid var(--color-primary-accent);
    padding-left: 18px;
    margin: 24px 0;
    font-style: italic;
    color: #4B5563;
}

.reader-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 40px 0 30px;
    padding-top: 20px;
    border-top: 1px solid var(--color-border-subtle);
}

.reader-tag {
    background-color: var(--color-section-bg);
    border: 1px solid var(--color-border-subtle);
    color: var(--color-text-secondary);
    font-size: 12.5px;
    font-weight: 500;
    padding: 4px 12px;
    border-radius: 9999px;
}

.article-loading {
    text-align: center;
    padding: 60px 20px;
    color: var(--color-text-muted);
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */

@media (max-width: 992px) {
    .articles-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 24px;
    }
}

@media (max-width: 640px) {
    .articles-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    
    .articles-nav-wrapper {
        flex-direction: column;
        align-items: stretch;
    }

    .articles-nav-tabs {
        gap: 20px;
    }

    .articles-search-capsule {
        width: 100%;
    }

    .hero-capsule-form {
        flex-direction: column;
        border-radius: 16px;
        padding: 8px;
        gap: 8px;
    }

    .capsule-input {
        width: 100%;
        padding: 10px 12px;
    }

    .capsule-button {
        width: 100%;
        padding: 12px;
    }

    .article-reader {
        padding: 28px 20px;
    }
}