/* ===== BLOG INDEX STYLES ===== */
/* Extends common.css - only blog index-specific styles here */

/* Additional color variables for blog themes */
:root {
    --color-blue: #00b4d8;
    --color-purple: #a855f7;
    --color-orange: #ff6b35;
    --color-laravel: #ff2d20;
    --color-filament: #fdae4b;
    --color-django: #44b78b;
}

/* ===== MAIN ===== */
main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 5rem 2rem;
}

/* ===== PAGE HEADER ===== */
.page-header {
    margin-bottom: 4rem;
    position: relative;
}

.page-header::after {
    content: '';
    position: absolute;
    bottom: -2rem;
    left: 0;
    width: 150px;
    height: 2px;
    background: linear-gradient(90deg, var(--color-accent), transparent);
}

.page-label {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--color-accent);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    opacity: 0;
    animation: label-reveal 0.6s ease forwards;
    animation-delay: 0.2s;
}

@keyframes label-reveal {
    from { opacity: 0; transform: translateX(-20px); }
    to { opacity: 1; transform: translateX(0); }
}

.page-label::before { content: '#'; color: var(--color-text-muted); }

.page-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 1.25rem;
    letter-spacing: -0.03em;
    opacity: 0;
    animation: title-reveal 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
    animation-delay: 0.3s;
}

@keyframes title-reveal {
    from { opacity: 0; transform: translateY(40px); filter: blur(10px); }
    to { opacity: 1; transform: translateY(0); filter: blur(0); }
}

.page-title .accent {
    color: var(--color-accent);
    position: relative;
}

.page-description {
    font-size: 1.15rem;
    color: var(--color-text-secondary);
    max-width: 600px;
    line-height: 1.8;
    opacity: 0;
    animation: desc-reveal 0.8s ease forwards;
    animation-delay: 0.5s;
}

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

/* ===== CATEGORY FILTERS ===== */
.category-filters {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 2.5rem;
    flex-wrap: wrap;
    opacity: 0;
    animation: filters-reveal 0.6s ease forwards;
    animation-delay: 0.6s;
}

@keyframes filters-reveal {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.filter-tab {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    padding: 0.5rem 1rem;
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
}

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

.filter-tab.active {
    border-color: var(--color-accent);
    color: var(--color-accent);
    background: var(--color-accent-subtle);
}

.filter-tab::before {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--color-accent);
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

.filter-tab.active::before {
    width: 100%;
    left: 0;
    transform: translateX(0);
}

.filter-count {
    font-size: 0.65rem;
    margin-left: 0.4rem;
    opacity: 0.6;
}

/* ===== FILTER ANIMATIONS ===== */
.article-card {
    transition:
        opacity 0.4s cubic-bezier(0.16, 1, 0.3, 1),
        transform 0.4s cubic-bezier(0.16, 1, 0.3, 1),
        filter 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.article-card.filtering-out {
    opacity: 0;
    transform: scale(0.92) translateY(-10px);
    filter: blur(8px);
    pointer-events: none;
}

.article-card.filtering-in {
    animation: card-load 0.5s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes card-load {
    0% {
        opacity: 0;
        transform: scale(0.95) translateY(20px);
        filter: blur(6px);
    }
    40% { filter: blur(0) brightness(1.2); }
    100% {
        opacity: 1;
        transform: scale(1) translateY(0);
        filter: blur(0) brightness(1);
    }
}

.article-card.hidden { display: none; }

.articles-grid.filtering::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, var(--color-accent-glow) 0%, transparent 100%);
    opacity: 0;
    animation: grid-flash 0.3s ease-out;
    pointer-events: none;
    z-index: 10;
}

@keyframes grid-flash {
    0% { opacity: 0.6; }
    100% { opacity: 0; }
}

.articles-grid { position: relative; }

.empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: 4rem 2rem;
    color: var(--color-text-secondary);
    font-family: var(--font-mono);
}

.empty-state::before {
    content: '// ';
    color: var(--color-text-muted);
}

/* ===== ARTICLES GRID ===== */
.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 1.5rem;
    margin-bottom: 4rem;
}

.article-card {
    display: flex;
    flex-direction: column;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 16px;
    padding: 2rem;
    text-decoration: none;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    position: relative;
    overflow: hidden;
    opacity: 0;
    transform: translateY(40px);
}

.article-card.visible {
    opacity: 1;
    transform: translateY(0);
}

.article-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--card-accent, var(--color-accent));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.article-card::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at top left, var(--color-accent-subtle), transparent 60%);
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.article-card:hover {
    border-color: var(--color-border-hover);
    transform: translateY(-8px);
    box-shadow: 0 20px 40px var(--shadow-color), 0 0 30px var(--color-accent-subtle);
}

.article-card:hover::before { transform: scaleX(1); }
.article-card:hover::after { opacity: 1; }

/* Card number */
.article-number {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--color-text-muted);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.article-number::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--color-border);
}

/* Card content */
.article-card h2 {
    font-family: var(--font-display);
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--color-text);
    line-height: 1.4;
    transition: color 0.3s ease;
}

.article-card:hover h2 { color: var(--color-accent); }

.article-card p {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
    line-height: 1.7;
    flex: 1;
}

/* Card meta */
.article-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: auto;
    padding-top: 1.25rem;
    border-top: 1px solid var(--color-border);
}

.article-tag {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    padding: 0.3rem 0.6rem;
    background: var(--tag-bg, var(--color-bg));
    border: 1px solid var(--tag-border, var(--color-border));
    border-radius: 4px;
    color: var(--tag-color, var(--color-text-secondary));
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.article-card:hover .article-tag {
    border-color: var(--card-accent, var(--color-accent));
    color: var(--card-accent, var(--color-accent));
}

.article-time {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--color-text-muted);
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

/* Card arrow */
.article-arrow {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    color: var(--color-text-muted);
    opacity: 0;
    transform: translate(-8px, 8px);
    transition: all 0.3s ease;
}

.article-arrow svg {
    width: 20px;
    height: 20px;
}

.article-card:hover .article-arrow {
    opacity: 1;
    transform: translate(0, 0);
    color: var(--card-accent, var(--color-accent));
}

/* Card theme variants */
.article-card[data-theme="laravel"] { --card-accent: var(--color-laravel); }
.article-card[data-theme="filament"] { --card-accent: var(--color-filament); }
.article-card[data-theme="strategy"] { --card-accent: var(--color-blue); }
.article-card[data-theme="errors"] { --card-accent: var(--color-orange); }
.article-card[data-theme="organization"] { --card-accent: var(--color-purple); }
.article-card[data-theme="django"] { --card-accent: var(--color-django); }

/* ===== CTA SECTION (BLOG INDEX OVERRIDE) ===== */
.cta-section {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 20px;
    padding: 4rem;
    text-align: center;
    position: relative;
    overflow: hidden;
    opacity: 0;
    transform: translateY(40px);
    transition: all 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.cta-section.visible {
    opacity: 1;
    transform: translateY(0);
}

.cta-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--color-accent), var(--color-blue), transparent);
}

.cta-section::after {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 400px;
    height: 200px;
    background: radial-gradient(ellipse, var(--color-accent-glow), transparent 70%);
    pointer-events: none;
}

.cta-section h2 {
    font-family: var(--font-display);
    font-size: 1.75rem;
    margin-bottom: 1rem;
    position: relative;
    z-index: 1;
}

.cta-section p {
    color: var(--color-text-secondary);
    margin-bottom: 2rem;
    font-size: 1.05rem;
    position: relative;
    z-index: 1;
}

.cta-section .btn {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 2rem;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: 8px;
    transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    background: var(--color-accent);
    color: var(--color-bg);
    position: relative;
    z-index: 1;
}

.cta-section .btn:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 30px var(--color-accent-glow);
}

.cta-section .btn svg { transition: transform 0.3s ease; }
.cta-section .btn:hover svg { transform: translateX(4px); }

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    main { padding: 3rem 1.5rem; }
    .articles-grid { grid-template-columns: 1fr; }
    .page-title { font-size: 2rem; }
    .cta-section { padding: 2.5rem 2rem; }
}

/* ===== SELECTION ===== */
::selection {
    background: var(--color-accent);
    color: var(--color-bg);
}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--color-bg); }
::-webkit-scrollbar-thumb { background: var(--color-border); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--color-border-hover); }