/* ============================================================
   Smart Posts Grid — Public Styles
   ============================================================ */

/* CSS Custom Properties set inline via shortcode */
.spg-wrapper {
    --spg-bg: #1a56db;
    --spg-text: #ffffff;
    --spg-accent: #ffffff;
    --spg-card-bg: #1e40af;
    --spg-radius: 12px;
    --spg-img-h: 220px;
    --spg-columns: 3;
    --spg-gap: 1.5rem;
    --spg-transition: 0.3s cubic-bezier(0.4,0,0.2,1);

    background: var(--spg-bg);
    color: var(--spg-text);
    padding: 3rem 1.5rem;
    border-radius: var(--spg-radius);
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    box-sizing: border-box;
}

.spg-wrapper *,
.spg-wrapper *::before,
.spg-wrapper *::after {
    box-sizing: inherit;
}

/* Section Title */
.spg-section-title {
    color: var(--spg-text);
    font-size: clamp(1.4rem, 3vw, 2.2rem);
    font-weight: 700;
    margin: 0 0 2rem 0;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

/* ============================================================
   GRID LAYOUT
   ============================================================ */
.spg-layout-grid .spg-grid {
    display: grid;
    grid-template-columns: repeat(var(--spg-columns), 1fr);
    gap: var(--spg-gap);
}

@media (max-width: 1023px) and (min-width: 600px) {
    .spg-layout-grid .spg-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 599px) {
    .spg-layout-grid .spg-grid {
        grid-template-columns: 1fr;
    }
}

/* ============================================================
   LIST LAYOUT
   ============================================================ */
.spg-layout-list .spg-grid {
    display: flex;
    flex-direction: column;
    gap: var(--spg-gap);
}

.spg-layout-list .spg-card-list {
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
}

.spg-layout-list .spg-card-list .spg-card-image-wrap {
    flex: 0 0 280px;
    max-width: 280px;
}

.spg-layout-list .spg-card-list .spg-card-body {
    flex: 1;
    padding: 0.5rem 0;
}

@media (max-width: 599px) {
    .spg-layout-list .spg-card-list {
        flex-direction: column;
    }
    .spg-layout-list .spg-card-list .spg-card-image-wrap {
        flex: none;
        max-width: 100%;
        width: 100%;
    }
}

/* ============================================================
   MASONRY LAYOUT
   ============================================================ */
.spg-layout-masonry .spg-grid {
    columns: var(--spg-columns);
    column-gap: var(--spg-gap);
}

.spg-layout-masonry .spg-card {
    break-inside: avoid;
    margin-bottom: var(--spg-gap);
}

@media (max-width: 1023px) and (min-width: 600px) {
    .spg-layout-masonry .spg-grid {
        columns: 2;
    }
}

@media (max-width: 599px) {
    .spg-layout-masonry .spg-grid {
        columns: 1;
    }
}

/* ============================================================
   CARD BASE
   ============================================================ */
.spg-card {
    background: var(--spg-card-bg);
    border-radius: var(--spg-radius);
    overflow: hidden;
    transition: transform var(--spg-transition), box-shadow var(--spg-transition);
    position: relative;
}

.spg-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.25);
}

/* Image */
.spg-card-image-wrap {
    display: block;
    position: relative;
    overflow: hidden;
    text-decoration: none;
}

.spg-card-image {
    width: 100%;
    height: var(--spg-img-h);
    background-size: cover;
    background-position: center;
    transition: transform 0.5s cubic-bezier(0.4,0,0.2,1);
}

.spg-card:hover .spg-card-image {
    transform: scale(1.05);
}

.spg-image-placeholder {
    background: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0.05) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
}

.spg-image-placeholder::after {
    content: '📷';
    font-size: 2rem;
    opacity: 0.3;
}

.spg-card-image-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.35) 0%, transparent 50%);
    transition: opacity var(--spg-transition);
}

/* Card Body */
.spg-card-body {
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

/* Category Badge */
.spg-cat-badge {
    display: inline-block;
    background: var(--spg-accent);
    color: var(--spg-bg);
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    padding: 0.2em 0.65em;
    border-radius: 4px;
    text-decoration: none;
    transition: opacity var(--spg-transition);
    align-self: flex-start;
}

.spg-cat-badge:hover {
    opacity: 0.8;
    color: var(--spg-bg);
}

/* Title */
.spg-card-title {
    margin: 0;
    font-size: clamp(0.95rem, 2vw, 1.15rem);
    font-weight: 700;
    line-height: 1.35;
    letter-spacing: -0.01em;
}

.spg-card-title a {
    color: var(--spg-text);
    text-decoration: none;
    transition: opacity var(--spg-transition);
}

.spg-card-title a:hover {
    opacity: 0.85;
    text-decoration: underline;
}

/* Excerpt */
.spg-card-excerpt {
    margin: 0;
    font-size: 0.875rem;
    line-height: 1.6;
    color: var(--spg-text);
    opacity: 0.8;
}

/* Meta */
.spg-card-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    font-size: 0.78rem;
    opacity: 0.7;
}

.spg-meta-item {
    display: flex;
    align-items: center;
    gap: 0.3em;
}

/* Read More */
.spg-read-more {
    display: inline-flex;
    align-items: center;
    gap: 0.35em;
    color: var(--spg-accent);
    font-size: 0.82rem;
    font-weight: 600;
    text-decoration: none;
    letter-spacing: 0.02em;
    transition: gap var(--spg-transition), opacity var(--spg-transition);
    align-self: flex-start;
    margin-top: auto;
}

.spg-read-more:hover {
    gap: 0.55em;
    color: var(--spg-accent);
    opacity: 0.85;
}

/* ============================================================
   LOAD MORE
   ============================================================ */
.spg-load-more-wrap {
    display: flex;
    justify-content: center;
    margin-top: 2.5rem;
}

.spg-load-more {
    position: relative;
    background: transparent;
    border: 2px solid var(--spg-accent);
    color: var(--spg-accent);
    font-size: 0.9rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    padding: 0.75em 2.5em;
    border-radius: 50px;
    cursor: pointer;
    transition: background var(--spg-transition), color var(--spg-transition), transform var(--spg-transition);
    display: inline-flex;
    align-items: center;
    gap: 0.5em;
    font-family: inherit;
    overflow: hidden;
}

.spg-load-more:hover:not(:disabled) {
    background: var(--spg-accent);
    color: var(--spg-bg);
    transform: scale(1.03);
}

.spg-load-more:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.spg-load-more.spg-loading .spg-btn-text {
    opacity: 0;
}

.spg-load-more.spg-loading .spg-btn-spinner {
    display: block;
}

.spg-btn-spinner {
    display: none;
    position: absolute;
    width: 18px;
    height: 18px;
    border: 2px solid transparent;
    border-top-color: currentColor;
    border-radius: 50%;
    animation: spg-spin 0.7s linear infinite;
}

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

/* ============================================================
   ANIMATIONS
   ============================================================ */
.spg-anim-fade .spg-card {
    animation: spg-fadeIn 0.5s ease both;
}

.spg-anim-slide .spg-card {
    animation: spg-slideUp 0.5s ease both;
}

@keyframes spg-fadeIn {
    from { opacity: 0; }
    to   { opacity: 1; }
}

@keyframes spg-slideUp {
    from { opacity: 0; transform: translateY(24px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* Stagger delay for grid children */
.spg-card:nth-child(1) { animation-delay: 0.05s; }
.spg-card:nth-child(2) { animation-delay: 0.10s; }
.spg-card:nth-child(3) { animation-delay: 0.15s; }
.spg-card:nth-child(4) { animation-delay: 0.20s; }
.spg-card:nth-child(5) { animation-delay: 0.25s; }
.spg-card:nth-child(6) { animation-delay: 0.30s; }

/* No posts */
.spg-no-posts {
    grid-column: 1 / -1;
    text-align: center;
    opacity: 0.7;
    padding: 3rem;
    font-size: 1.1rem;
}

/* ============================================================
   RESPONSIVE UTILITIES
   ============================================================ */
@media (max-width: 599px) {
    .spg-wrapper {
        padding: 2rem 1rem;
    }
    .spg-card-body {
        padding: 1rem;
    }
}