/* ===== Blog Index — Theme Variables ===== */
.blog-index {
    --bi-surface: #ffffff;
    --bi-surface-soft: #f8f9fa;
    --bi-border: #e2e8f0;
    --bi-border-subtle: rgba(100, 116, 139, 0.12);
    --bi-text: #1e293b;
    --bi-text-muted: #64748b;
    --bi-text-soft: rgba(100, 116, 139, 0.6);
    --bi-accent: #667eea;
    --bi-accent-soft: rgba(102, 126, 234, 0.10);
    --bi-accent-border: rgba(102, 126, 234, 0.20);
    --bi-accent-text: #667eea;
    --bi-accent-text-strong: #4f46e5;
    --bi-accent-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --bi-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
    --bi-shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.10);
    --bi-hero-bg: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #4f46e5 100%);
    --bi-hero-glow: radial-gradient(circle, rgba(255, 255, 255, 0.15) 0%, transparent 70%);
    --bi-hero-title-gradient: linear-gradient(90deg, #fff, #e0e7ff, #c7d2fe);
    --bi-hero-subtitle: rgba(255, 255, 255, 0.85);
    --bi-hero-pill-bg: rgba(255, 255, 255, 0.15);
    --bi-hero-pill-border: rgba(255, 255, 255, 0.20);
    --bi-hero-pill-text: #fff;
    --bi-card-bg: var(--bi-surface);
    --bi-card-border: var(--bi-border);
    --bi-tag-bg: var(--bi-surface-soft);
    --bi-tag-border: var(--bi-border-subtle);
    --bi-tag-text: var(--bi-text-muted);
    --bi-btn-bg: linear-gradient(135deg, #667eea 0%, #6366f1 100%);
    --bi-btn-hover: linear-gradient(135deg, #7c8cf5 0%, #818cf8 100%);
    --bi-btn-shadow: rgba(102, 126, 234, 0.25);
    color: var(--bi-text);
}

.theme-dark .blog-index {
    --bi-surface: #1e293b;
    --bi-surface-soft: #0f172a;
    --bi-border: #334155;
    --bi-border-subtle: rgba(129, 140, 248, 0.10);
    --bi-text: #e2e8f0;
    --bi-text-muted: #94a3b8;
    --bi-text-soft: rgba(148, 163, 184, 0.6);
    --bi-accent: #818cf8;
    --bi-accent-soft: rgba(129, 140, 248, 0.14);
    --bi-accent-border: rgba(129, 140, 248, 0.35);
    --bi-accent-text: #818cf8;
    --bi-accent-text-strong: #c4b5fd;
    --bi-accent-gradient: linear-gradient(135deg, #818cf8 0%, #a78bfa 100%);
    --bi-shadow: 0 1px 3px rgba(0, 0, 0, 0.30);
    --bi-shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.45);
    --bi-hero-bg: linear-gradient(135deg, #0f0c29 0%, #1a1046 40%, #302b63 70%, #24243e 100%);
    --bi-hero-glow: radial-gradient(circle, rgba(129, 140, 248, 0.30) 0%, rgba(167, 139, 250, 0.12) 40%, transparent 70%);
    --bi-hero-title-gradient: linear-gradient(90deg, #c084fc, #818cf8, #67e8f9);
    --bi-hero-subtitle: rgba(226, 232, 240, 0.85);
    --bi-hero-pill-bg: rgba(255, 255, 255, 0.08);
    --bi-hero-pill-border: rgba(255, 255, 255, 0.12);
    --bi-hero-pill-text: #e2e8f0;
    --bi-card-bg: linear-gradient(160deg, #161230 0%, #1c1740 100%);
    --bi-card-border: rgba(129, 140, 248, 0.10);
    --bi-tag-bg: rgba(15, 12, 41, 0.5);
    --bi-tag-border: rgba(129, 140, 248, 0.12);
    --bi-tag-text: rgba(226, 232, 240, 0.5);
    --bi-btn-bg: linear-gradient(135deg, #7c3aed 0%, #6366f1 100%);
    --bi-btn-hover: linear-gradient(135deg, #8b5cf6 0%, #818cf8 100%);
    --bi-btn-shadow: rgba(124, 58, 237, 0.25);
}

/* ===== Breadcrumb ===== */
.blog-index .breadcrumb {
    background: none;
    padding: 0;
    margin: 0;
    font-size: 0.875rem;
}

.blog-index .breadcrumb-item.active {
    color: var(--bi-text-muted);
    font-size: 0.875rem;
}

.blog-index .breadcrumb-item a {
    color: var(--bi-accent-text);
    text-decoration: none;
}

.blog-index .breadcrumb-item a:hover {
    text-decoration: underline;
}

/* ===== Hero ===== */
.bi-hero {
    position: relative;
    overflow: hidden;
    padding: 3rem 2rem 2.5rem;
    border-radius: 1rem;
    background: var(--bi-hero-bg);
    color: #fff;
    text-align: center;
}

.bi-hero-glow {
    position: absolute;
    top: -40%;
    left: 50%;
    transform: translateX(-50%);
    width: 420px;
    height: 420px;
    border-radius: 50%;
    background: var(--bi-hero-glow);
    pointer-events: none;
    z-index: 0;
}

.bi-hero-content {
    position: relative;
    z-index: 1;
}

.bi-hero h1 {
    font-size: 2.25rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 0.5rem;
    background: var(--bi-hero-title-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.bi-hero-subtitle {
    font-size: 1.05rem;
    line-height: 1.6;
    color: var(--bi-hero-subtitle);
    margin: 0 0 1.5rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Hero Pills */
.bi-hero-pills {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.bi-hero-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    padding: 0.45rem 1rem;
    border-radius: 2rem;
    font-size: 0.82rem;
    font-weight: 600;
    background: var(--bi-hero-pill-bg);
    border: 1px solid var(--bi-hero-pill-border);
    color: var(--bi-hero-pill-text);
    backdrop-filter: blur(6px);
}

.bi-hero-pill i {
    font-size: 0.85rem;
    opacity: 0.8;
}

/* ===== Blog Grid ===== */
.bi-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.25rem;
}

/* ===== Blog Card ===== */
.bi-card {
    position: relative;
    border-radius: 0.85rem;
    background: var(--bi-card-bg);
    border: 1px solid var(--bi-card-border);
    box-shadow: var(--bi-shadow);
    overflow: hidden;
    transition: all 0.25s ease;
    display: flex;
    flex-direction: column;
}

.bi-card:hover {
    box-shadow: var(--bi-shadow-hover);
    border-color: var(--bi-accent-border);
    transform: translateY(-2px);
}

/* Card Icon Header */
.bi-card-icon-header {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem 1.5rem 1rem;
    font-size: 2.5rem;
    color: var(--bi-accent-text);
    opacity: 0.6;
}

.bi-card:hover .bi-card-icon-header {
    opacity: 1;
}

/* Card Body */
.bi-card-body {
    padding: 0 1.25rem 1.25rem;
    flex: 1;
    display: flex;
    flex-direction: column;
}

/* Card Category Tag */
.bi-card-category {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.2rem 0.6rem;
    border-radius: 2rem;
    font-size: 0.68rem;
    font-weight: 600;
    background: var(--bi-tag-bg);
    border: 1px solid var(--bi-tag-border);
    color: var(--bi-tag-text);
    margin-bottom: 0.6rem;
    width: fit-content;
}

.bi-card-category i {
    font-size: 0.62rem;
}

/* Card Title */
.bi-card-title {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--bi-text);
    margin: 0 0 0.5rem;
    line-height: 1.4;
}

/* Card Description */
.bi-card-desc {
    font-size: 0.85rem;
    line-height: 1.65;
    color: var(--bi-text-muted);
    margin: 0 0 1rem;
    flex: 1;
}

/* Card Tags */
.bi-card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.3rem;
    margin-bottom: 1rem;
}

.bi-card-tag {
    padding: 0.15rem 0.5rem;
    border-radius: 2rem;
    font-size: 0.64rem;
    font-weight: 600;
    background: var(--bi-accent-soft);
    border: 1px solid var(--bi-accent-border);
    color: var(--bi-accent-text);
}

/* Card Action */
.bi-card-action {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.55rem 1.1rem;
    border-radius: 0.55rem;
    font-size: 0.8rem;
    font-weight: 600;
    color: #fff;
    background: var(--bi-btn-bg);
    border: none;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 2px 8px var(--bi-btn-shadow);
    width: fit-content;
}

.bi-card-action:hover {
    background: var(--bi-btn-hover);
    box-shadow: 0 4px 12px var(--bi-btn-shadow);
    color: #fff;
    text-decoration: none;
}

.bi-card-action i {
    font-size: 0.72rem;
    transition: transform 0.2s ease;
}

.bi-card-action:hover i {
    transform: translateX(3px);
}

/* ===== Responsive ===== */
@media (max-width: 767.98px) {
    .bi-hero {
        padding: 2rem 1.25rem 1.75rem;
    }

    .bi-hero h1 {
        font-size: 1.6rem;
    }

    .bi-hero-subtitle {
        font-size: 0.92rem;
    }

    .bi-hero-pills {
        flex-direction: column;
        align-items: center;
        gap: 0.5rem;
    }

    .bi-hero-pill {
        width: 100%;
        max-width: 240px;
        justify-content: center;
    }

    .bi-grid {
        grid-template-columns: 1fr;
    }
}