/* ==========================================================================
   /posts — Editorial dark-mode index
   Style language aligned with post-detail.blade.php (.pd-wrap)
   Mobile-first · A11y · Reduced-motion aware · Lazy media
   ========================================================================== */

/* ====== Page tokens (shared vocabulary with .pd-wrap) ====== */
.pi-wrap {
    --pi-radius: 14px;
    --pi-radius-sm: 10px;
    --pi-bg-page: #0a0e1a;
    --pi-bg-surface: #131826;
    --pi-bg-surface-2: #1a2032;
    --pi-bg-elevated: #1f2638;
    --pi-line: rgba(255, 255, 255, 0.08);
    --pi-line-strong: rgba(255, 255, 255, 0.14);
    --pi-ink: #f1f5f9;
    --pi-ink-soft: #cbd5e1;
    --pi-ink-mute: #94a3b8;
    --pi-ink-faint: #64748b;
    --pi-accent: #3b82f6;
    --pi-accent-hover: #60a5fa;
    --pi-accent-glow: rgba(59, 130, 246, 0.35);
    --pi-amber: #fbbf24;
    --pi-grad-cta: linear-gradient(135deg, #1e3a8a 0%, #312e81 50%, #4c1d95 100%);
    --pi-grad-hero: linear-gradient(180deg, rgba(10, 14, 26, 0) 30%, rgba(10, 14, 26, 0.96) 100%);
    --pi-grad-card: linear-gradient(180deg, #1a2032 0%, #131826 100%);
    --pi-grad-pill: linear-gradient(135deg, rgba(59, 130, 246, 0.15) 0%, rgba(139, 92, 246, 0.15) 100%);
    background: var(--pi-bg-page);
    color: var(--pi-ink);
    min-height: 100vh;
}

/* ===== Skip link ===== */
.pi-skip {
    position: absolute;
    left: -9999px;
    top: 8px;
    background: var(--pi-accent);
    color: #fff;
    padding: 10px 16px;
    border-radius: var(--pi-radius-sm);
    font-weight: 600;
    z-index: 1000;
}
.pi-skip:focus { left: 8px; outline: 3px solid var(--pi-accent-hover); outline-offset: 2px; }

/* ===== 1. Breadcrumb ===== */
.pi-wrap .pi-breadcrumb {
    background: var(--pi-bg-surface);
    border-bottom: 1px solid var(--pi-line);
}
.pi-wrap .pi-breadcrumb .breadcrumb {
    margin: 0;
    background: transparent;
    padding: 16px 0;
    font-size: 14px;
}
.pi-wrap .pi-breadcrumb .breadcrumb-item + .breadcrumb-item::before {
    content: "\f105";
    font-family: "Font Awesome 5 Free";
    font-weight: 900;
    color: var(--pi-ink-faint);
    font-size: 12px;
    padding-right: 4px;
}
.pi-wrap .pi-breadcrumb .breadcrumb-item a {
    color: var(--pi-ink-mute);
    text-decoration: none;
    transition: color 0.2s;
}
.pi-wrap .pi-breadcrumb .breadcrumb-item a:hover { color: var(--pi-accent-hover); }
.pi-wrap .pi-breadcrumb .breadcrumb-item.active {
    color: var(--pi-ink);
    font-weight: 500;
}

/* ===== 2. Masthead ===== */
.pi-masthead {
    padding: 64px 0 40px;
    background:
        radial-gradient(1200px 400px at 50% -10%, rgba(59, 130, 246, 0.18), transparent 70%),
        var(--pi-bg-page);
}
.pi-masthead__eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--pi-grad-pill);
    border: 1px solid var(--pi-line-strong);
    color: var(--pi-accent-hover);
    padding: 6px 14px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}
.pi-masthead__eyebrow .fa { font-size: 11px; }
.pi-masthead h1 {
    margin: 18px 0 12px;
    font-size: clamp(2rem, 5vw, 3.4rem);
    font-weight: 700;
    line-height: 1.05;
    letter-spacing: -0.02em;
    color: var(--pi-ink);
}
.pi-masthead h1 em {
    font-style: normal;
    background: linear-gradient(135deg, #60a5fa 0%, #a78bfa 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}
.pi-masthead__lede {
    max-width: 64ch;
    color: var(--pi-ink-soft);
    font-size: 17px;
    line-height: 1.6;
}
.pi-masthead__stats {
    display: flex;
    flex-wrap: wrap;
    gap: 28px;
    margin-top: 28px;
    color: var(--pi-ink-mute);
    font-size: 14px;
}
.pi-masthead__stats b {
    color: var(--pi-ink);
    font-weight: 600;
    margin-right: 6px;
}

/* ===== 3. Category filter pills ===== */
.pi-filters {
    border-top: 1px solid var(--pi-line);
    border-bottom: 1px solid var(--pi-line);
    background: rgba(19, 24, 38, 0.6);
    backdrop-filter: blur(8px);
    position: sticky;
    top: 0;
    z-index: 20;
}
.pi-filters__inner {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px 0;
    overflow-x: auto;
    scrollbar-width: thin;
}
.pi-filters__inner::-webkit-scrollbar { height: 4px; }
.pi-filters__inner::-webkit-scrollbar-thumb { background: var(--pi-line-strong); border-radius: 2px; }
.pi-filters__label {
    color: var(--pi-ink-faint);
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    white-space: nowrap;
    margin-right: 4px;
}
.pi-pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: 999px;
    border: 1px solid var(--pi-line-strong);
    background: var(--pi-bg-surface-2);
    color: var(--pi-ink-soft);
    font-size: 13px;
    font-weight: 500;
    text-decoration: none;
    white-space: nowrap;
    transition: all 0.2s ease-out;
    min-height: 36px;
}
.pi-pill:hover {
    color: var(--pi-ink);
    border-color: var(--pi-accent);
    background: rgba(59, 130, 246, 0.08);
}
.pi-pill:focus-visible {
    outline: 2px solid var(--pi-accent-hover);
    outline-offset: 2px;
}
.pi-pill[aria-pressed="true"] {
    background: var(--pi-grad-cta);
    color: #fff;
    border-color: transparent;
    box-shadow: 0 4px 14px var(--pi-accent-glow);
}
.pi-pill__count {
    background: rgba(255, 255, 255, 0.08);
    color: inherit;
    padding: 1px 7px;
    border-radius: 999px;
    font-size: 11px;
    font-weight: 600;
}
.pi-pill[aria-pressed="true"] .pi-pill__count { background: rgba(255, 255, 255, 0.2); }

/* ===== 4. Editorial grid ===== */
.pi-grid {
    padding: 48px 0 96px;
}
.pi-grid__heading {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 28px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--pi-line);
}
.pi-grid__heading h2 {
    margin: 0;
    font-size: clamp(1.25rem, 2.4vw, 1.6rem);
    font-weight: 600;
    color: var(--pi-ink);
    letter-spacing: -0.01em;
}
.pi-grid__heading .pi-grid__count {
    color: var(--pi-ink-faint);
    font-size: 13px;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    white-space: nowrap;
}

/* Featured (hero) post — first card spans full row */
.pi-feature {
    position: relative;
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: 0;
    margin-bottom: 32px;
    background: var(--pi-grad-card);
    border: 1px solid var(--pi-line);
    border-radius: var(--pi-radius);
    overflow: hidden;
    transition: transform 0.25s ease-out, border-color 0.25s ease-out, box-shadow 0.25s ease-out;
}
@media (max-width: 767.98px) {
    .pi-feature { grid-template-columns: 1fr; }
}
.pi-feature:hover {
    transform: translateY(-3px);
    border-color: var(--pi-line-strong);
    box-shadow: 0 18px 48px rgba(0, 0, 0, 0.45);
}
.pi-feature:focus-within {
    outline: 2px solid var(--pi-accent-hover);
    outline-offset: 3px;
}
.pi-feature__media {
    position: relative;
    aspect-ratio: 16 / 10;
    overflow: hidden;
    background: var(--pi-bg-elevated);
}
.pi-feature__media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.5s ease-out;
}
.pi-feature:hover .pi-feature__media img { transform: scale(1.04); }
.pi-feature__media::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(10, 14, 26, 0.1) 50%, rgba(10, 14, 26, 0.6) 100%);
    pointer-events: none;
}
.pi-feature__chip {
    position: absolute;
    top: 20px;
    left: 20px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--pi-amber);
    color: #0a0e1a;
    padding: 5px 12px;
    border-radius: 999px;
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    z-index: 1;
}
.pi-feature__body {
    padding: 40px 36px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}
@media (max-width: 767.98px) {
    .pi-feature__body { padding: 24px; }
}
.pi-feature__meta {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    color: var(--pi-ink-mute);
    font-size: 13px;
    margin-bottom: 16px;
}
.pi-feature__meta .pi-badge-cat {
    color: var(--pi-accent-hover);
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    font-size: 12px;
}
.pi-feature__title {
    margin: 0 0 16px;
    font-size: clamp(1.5rem, 2.6vw, 2rem);
    font-weight: 700;
    line-height: 1.2;
    color: var(--pi-ink);
    letter-spacing: -0.015em;
}
.pi-feature__title a {
    color: inherit;
    text-decoration: none;
    transition: color 0.2s;
}
.pi-feature__title a:hover { color: var(--pi-accent-hover); }
.pi-feature__desc {
    color: var(--pi-ink-soft);
    font-size: 15px;
    line-height: 1.65;
    margin: 0 0 24px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.pi-feature__cta {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--pi-accent-hover);
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    letter-spacing: 0.04em;
    align-self: flex-start;
}
.pi-feature__cta .fa { transition: transform 0.2s ease-out; }
.pi-feature__cta:hover .fa { transform: translateX(4px); }
.pi-feature__cta:focus-visible {
    outline: 2px solid var(--pi-accent-hover);
    outline-offset: 4px;
    border-radius: 4px;
}

/* Standard cards */
.pi-cards {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 28px;
}
@media (max-width: 991.98px) {
    .pi-cards { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 575.98px) {
    .pi-cards { grid-template-columns: 1fr; gap: 22px; }
}

.pi-card {
    background: var(--pi-grad-card);
    border: 1px solid var(--pi-line);
    border-radius: var(--pi-radius);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: transform 0.25s ease-out, border-color 0.25s ease-out, box-shadow 0.25s ease-out;
}
.pi-card:hover {
    transform: translateY(-4px);
    border-color: var(--pi-line-strong);
    box-shadow: 0 14px 36px rgba(0, 0, 0, 0.4);
}
.pi-card:focus-within {
    outline: 2px solid var(--pi-accent-hover);
    outline-offset: 3px;
}
.pi-card__media {
    position: relative;
    aspect-ratio: 16 / 10;
    overflow: hidden;
    background: var(--pi-bg-elevated);
}
.pi-card__media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.45s ease-out;
}
.pi-card:hover .pi-card__media img { transform: scale(1.06); }
.pi-card__chip {
    position: absolute;
    top: 14px;
    left: 14px;
    background: rgba(59, 130, 246, 0.95);
    color: #fff;
    padding: 4px 10px;
    border-radius: 999px;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    backdrop-filter: blur(4px);
}
.pi-card__body { padding: 22px; flex: 1; display: flex; flex-direction: column; }
.pi-card__meta {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--pi-ink-faint);
    font-size: 12px;
    margin-bottom: 12px;
}
.pi-card__meta time { display: inline-flex; align-items: center; gap: 6px; }
.pi-card__meta .pi-dot { width: 3px; height: 3px; background: currentColor; border-radius: 50%; opacity: 0.6; }
.pi-card__meta .pi-cat {
    color: var(--pi-accent-hover);
    font-weight: 600;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}
.pi-card__title {
    margin: 0 0 10px;
    font-size: 17px;
    font-weight: 600;
    line-height: 1.35;
    color: var(--pi-ink);
    letter-spacing: -0.01em;
}
.pi-card__title a {
    color: inherit;
    text-decoration: none;
    transition: color 0.2s;
}
.pi-card__title a:hover { color: var(--pi-accent-hover); }
.pi-card__desc {
    color: var(--pi-ink-soft);
    font-size: 14px;
    line-height: 1.6;
    margin: 0 0 16px;
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.pi-card__read {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--pi-ink-mute);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-decoration: none;
    margin-top: auto;
    transition: color 0.2s;
    align-self: flex-start;
}
.pi-card__read .fa { font-size: 11px; transition: transform 0.2s ease-out; }
.pi-card__read:hover { color: var(--pi-accent-hover); }
.pi-card__read:hover .fa { transform: translateX(3px); }
.pi-card__read:focus-visible {
    outline: 2px solid var(--pi-accent-hover);
    outline-offset: 4px;
    border-radius: 4px;
}

/* ===== 5. Empty state ===== */
.pi-empty {
    text-align: center;
    padding: 80px 24px;
    background: var(--pi-bg-surface);
    border: 1px dashed var(--pi-line-strong);
    border-radius: var(--pi-radius);
    margin: 0 auto;
    max-width: 520px;
}
.pi-empty .fa {
    font-size: 40px;
    color: var(--pi-ink-faint);
    margin-bottom: 16px;
}
.pi-empty h2 {
    margin: 0 0 8px;
    font-size: 20px;
    font-weight: 600;
    color: var(--pi-ink);
}
.pi-empty p {
    margin: 0;
    color: var(--pi-ink-mute);
    font-size: 15px;
}

/* ===== 6. Loading shimmer (fallback) ===== */
.pi-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 320px;
    color: var(--pi-ink-faint);
    gap: 12px;
}
.pi-loading .pi-spinner {
    width: 20px;
    height: 20px;
    border: 2px solid var(--pi-line-strong);
    border-top-color: var(--pi-accent);
    border-radius: 50%;
    animation: pi-spin 0.8s linear infinite;
}
@keyframes pi-spin { to { transform: rotate(360deg); } }

/* ===== 7. Entrance animation (reduced-motion safe) ===== */
.pi-anim {
    opacity: 0;
    transform: translateY(12px);
    animation: pi-rise 0.55s ease-out forwards;
}
.pi-anim:nth-child(1) { animation-delay: 0.05s; }
.pi-anim:nth-child(2) { animation-delay: 0.1s; }
.pi-anim:nth-child(3) { animation-delay: 0.15s; }
.pi-anim:nth-child(4) { animation-delay: 0.2s; }
.pi-anim:nth-child(5) { animation-delay: 0.25s; }
.pi-anim:nth-child(6) { animation-delay: 0.3s; }
@keyframes pi-rise {
    to { opacity: 1; transform: translateY(0); }
}
@media (prefers-reduced-motion: reduce) {
    .pi-anim, .pi-feature, .pi-card, .pi-card__media img, .pi-feature__media img,
    .pi-feature__cta .fa, .pi-card__read .fa, .pi-loading .pi-spinner {
        animation: none !important;
        transition: none !important;
        transform: none !important;
    }
    .pi-anim { opacity: 1; }
}

/* ===== 8. Mobile-only refinements ===== */
@media (max-width: 575.98px) {
    .pi-masthead { padding: 40px 0 28px; }
    .pi-masthead__stats { gap: 18px; }
    .pi-grid { padding: 32px 0 64px; }
}