/* ========================================
   BLOG - MAIN STYLES
   ======================================== */

/* ===== Tool Navigation (Breadcrumb) ===== */
.tool-nav {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: 12px 0;
    position: sticky;
    top: 60px;
    z-index: 40;
    backdrop-filter: blur(12px);
    background: rgba(255, 255, 255, 0.85);
}

.tool-nav .container {
    display: flex;
    align-items: center;
    gap: 20px;
}

.tool-nav-back {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: var(--transition);
}

.tool-nav-back:hover {
    color: var(--primary);
}

.tool-nav-title {
    font-weight: 600;
    color: var(--text);
    font-size: 0.9rem;
}

/* ===== Blog Header ===== */
.blog-header {
    padding: 40px 0 20px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 32px;
}

.blog-header h1 {
    font-size: 2rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 4px;
    color: var(--text);
}

.blog-header p {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* ===== Blog Grid ===== */
.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 24px;
    margin-bottom: 48px;
}

/* ===== Blog Card Link ===== */
.blog-card-link {
    text-decoration: none;
    color: inherit;
    display: block;
    transition: var(--transition);
}

.blog-card-link:hover {
    transform: translateY(-4px);
}

.blog-card-link:hover .blog-card {
    border-color: var(--primary);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.08);
}

/* ===== Blog Card ===== */
.blog-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px 22px 24px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    height: 100%;
    cursor: pointer;
}

.blog-card .badge {
    display: inline-block;
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--primary);
    background: var(--primary-light);
    padding: 2px 10px;
    border-radius: 20px;
    margin-bottom: 10px;
    align-self: flex-start;
}

.blog-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 6px;
    color: var(--text);
    line-height: 1.3;
}

.blog-card .meta {
    font-size: 0.8rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 10px;
}

.blog-card .excerpt {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
    flex: 1;
}

.blog-card .read-more {
    margin-top: 14px;
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 4px;
}

.blog-card .read-more svg {
    transition: transform 0.2s;
}

.blog-card-link:hover .read-more svg {
    transform: translateX(4px);
}

/* ===== Loading & Error States ===== */
.loading-spinner {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-muted);
    font-size: 1rem;
    grid-column: 1 / -1;
}

.error-message {
    text-align: center;
    padding: 60px 20px;
    color: #ef4444;
    grid-column: 1 / -1;
}

.empty-message {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-muted);
    grid-column: 1 / -1;
}