/* ==========================================================================
   ESGRI Research Blogs — Refined Academic Editorial
   ========================================================================== */

:root {
    --esgri-font-display: inherit;
    --esgri-font-body: inherit;
    --esgri-color-ink: #1a1a2e;
    --esgri-color-ink-light: #4a4a5a;
    --esgri-color-ink-muted: #7a7a8a;
    --esgri-color-surface: #f6f6f8;
    --esgri-color-card: #ffffff;
    --esgri-color-accent: #193b65;
    --esgri-color-accent-hover: #122d4f;
    --esgri-color-dark: #2b2b2b;
    --esgri-color-dark-surface: #363636;
    --esgri-radius: 0;
    --esgri-shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
    --esgri-shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
    --esgri-shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.1);
}

/* --- Page Layout --- */
.esgri-rb-page {
    max-width: 1140px;
    margin: 0 auto;
    padding: 0 0 80px;
    font-family: var(--esgri-font-body);
    color: var(--esgri-color-ink);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ==========================================================================
   Hero / Page Title
   ========================================================================== */
.esgri-rb-hero {
    padding: 48px 0 0;
    margin-bottom: 48px;
}

.esgri-rb-hero__inner {
    position: relative;
}

.esgri-rb-page-title {
    font-family: var(--esgri-font-display);
    font-size: 2rem;
    font-weight: 700;
    color: var(--esgri-color-ink);
    margin: 0;
    padding-bottom: 16px;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    letter-spacing: -0.01em;
}

.esgri-rb-page-title__icon {
    font-size: 1.4rem;
    opacity: 0.7;
}

.esgri-rb-hero__line {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--esgri-color-ink);
}

/* ==========================================================================
   Sections
   ========================================================================== */
.esgri-rb-section {
    margin-bottom: 64px;
    padding-left: 24px;
    padding-right: 24px;
}

.esgri-rb-latest,
.esgri-rb-section:last-child {
    padding-left: 0;
    padding-right: 0;
}

.esgri-rb-section-title {
    font-family: var(--esgri-font-display);
    font-size: 1.6rem;
    font-weight: 700;
    color: #193b65;
    margin: 0 0 28px;
    letter-spacing: -0.01em;
}


/* ==========================================================================
   Grid
   ========================================================================== */
.esgri-rb-grid {
    display: grid;
    gap: 28px;
}

.esgri-rb-grid--2col {
    grid-template-columns: repeat(2, 1fr);
}

.esgri-rb-grid--3col {
    grid-template-columns: repeat(3, 1fr);
}

/* ==========================================================================
   Blog Card — Popular & Recent Posts
   ========================================================================== */
.esgri-rb-card {
    background: var(--esgri-color-card);
    border-radius: var(--esgri-radius);
    overflow: hidden;
    box-shadow: var(--esgri-shadow-sm);
    transition: transform 0.35s cubic-bezier(0.2, 0.9, 0.3, 1),
                box-shadow 0.35s cubic-bezier(0.2, 0.9, 0.3, 1);
    opacity: 0;
    transform: translateY(20px);
    animation: esgri-fade-up 0.5s cubic-bezier(0.2, 0.9, 0.3, 1) forwards;
}

.esgri-rb-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--esgri-shadow-lg);
}

.esgri-rb-card__thumb-link {
    display: block;
    overflow: hidden;
}

.esgri-rb-card__thumb {
    width: 100%;
    aspect-ratio: 3618 / 2161;
    object-fit: cover;
    display: block;
    transition: transform 0.5s cubic-bezier(0.2, 0.9, 0.3, 1);
}

.esgri-rb-card:hover .esgri-rb-card__thumb {
    transform: scale(1.04);
}

.esgri-rb-card__body {
    padding: 22px 24px 26px;
}

.esgri-rb-card__title {
    font-family: var(--esgri-font-display);
    font-size: 1.1rem;
    font-weight: 700;
    line-height: 1.4;
    margin: 0 0 10px;
    letter-spacing: -0.01em;
}

.esgri-rb-card__title a {
    color: var(--esgri-color-ink);
    text-decoration: none;
    transition: color 0.2s ease;
}

.esgri-rb-card__title a:hover {
    color: var(--esgri-color-accent);
}

.esgri-rb-card__meta {
    font-size: 0.82rem;
    color: var(--esgri-color-ink-muted);
    margin: 0 0 14px;
    font-weight: 400;
    line-height: 1.5;
}

.esgri-rb-card__excerpt {
    font-size: 0.9rem;
    color: var(--esgri-color-ink-light);
    line-height: 1.65;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.esgri-rb-card__excerpt p {
    margin: 0;
}

.esgri-rb-card__authors {
    display: flex;
    gap: 12px;
    margin-top: 20px;
}

.esgri-rb-card__authors--many {
    justify-content: center;
    margin-left: 0;
    margin-right: 0;
    padding-left: 0;
    padding-right: 0;
}

.esgri-rb-card__avatar {
    width: 55px;
    height: 55px;
    border-radius: 50% !important;
    object-fit: cover;
    border: 2px solid #fff;
    box-shadow: 0 2px 6px rgba(0,0,0,0.15);
}

/* ==========================================================================
   Featured / Latest Blog — Full-width Green Divider + Dark Banner
   ========================================================================== */
.esgri-rb-popular .esgri-rb-section-title {
    color: #fff;
    margin-bottom: 24px !important;
}

.esgri-rb-popular {
    /* Break out of parent container to full viewport width */
    width: 100vw;
    position: relative;
    left: 50%;
    right: 50%;
    margin-left: -50vw;
    margin-right: -50vw;
    /* Blue band background */
    background: #193b65;
    padding: 48px 24px 56px;
    border-radius: 0;
    overflow: hidden;
}

/* === EP + Popular Layout === */
.esgri-rb-popular-inner {
    max-width: 1140px;
    margin: 0 auto;
    display: flex;
    gap: 32px;
}

.esgri-rb-ep {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.esgri-rb-ep__card-wrap {
    flex: 1;
    display: flex;
}

.esgri-rb-ep .esgri-rb-card {
    flex: 1;
    padding: 12px;
}

.esgri-rb-ep .esgri-rb-card__thumb,
.esgri-rb-pop .esgri-rb-card__thumb {
    width: 340px;
    height: 300px;
    object-fit: cover;
    display: block;
}

.esgri-rb-pop {
    flex: 2;
    display: flex;
    flex-direction: column;
}

.esgri-rb-pop .esgri-rb-grid--2col {
    flex: 1;
    grid-template-columns: 1fr;
    grid-template-rows: 1fr 1fr;
    gap: 16px;
}

.esgri-rb-pop .esgri-rb-card {
    display: flex;
    padding: 12px;
}

.esgri-rb-pop .esgri-rb-card__thumb-link {
    flex: 0 0 auto;
}

.esgri-rb-pop .esgri-rb-card__body {
    flex: 1;
}


.esgri-rb-featured-wrapper {
    max-width: 1280px;
    margin: 0 auto;
}

.esgri-rb-featured {
    display: flex;
    text-decoration: none;
    color: inherit;
    overflow: hidden;
    transition: box-shadow 0.3s ease;
    padding: 32px;
    background: var(--esgri-color-card);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.12) !important;
}

.esgri-rb-featured:hover {
    opacity: 0.95;
}

.esgri-rb-featured__image {
    flex: 0 0 48%;
    aspect-ratio: 3618 / 2161;
    background-size: cover;
    background-position: center;
    border-radius: 0;
    position: relative;
}

.esgri-rb-featured__content {
    flex: 1;
    padding: 16px 0 16px 40px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.esgri-rb-featured__title-row {
    display: flex;
    align-items: flex-start;
}

.esgri-rb-featured__title-row .esgri-rb-featured__title {
    flex: 1;
}

.esgri-rb-featured__logo {
    width: 56px;
    height: auto;
    flex-shrink: 0;
}

.esgri-rb-podcast-trigger {
    cursor: pointer;
    transition: transform 0.2s ease, opacity 0.2s ease;
}

.esgri-rb-podcast-trigger:hover {
    transform: scale(1.1);
    opacity: 0.8;
}

/* === Podcast Popup === */
.esgri-rb-podcast-popup {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 380px;
    background: #193b65;
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.18);
    z-index: 99999;
    overflow: hidden;
    animation: esgri-popup-in 0.3s ease;
}

.esgri-rb-podcast-popup__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    background: #193b65;
    color: #fff;
}

.esgri-rb-podcast-popup__title {
    font-size: 0.9rem;
    font-weight: 600;
}

.esgri-rb-podcast-popup__close {
    background: none;
    border: none;
    color: #fff;
    font-size: 1.4rem;
    cursor: pointer;
    line-height: 1;
    padding: 0 4px;
    opacity: 0.7;
    transition: opacity 0.2s ease;
}

.esgri-rb-podcast-popup__close:hover {
    opacity: 1;
}

@keyframes esgri-popup-in {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.esgri-rb-featured__title {
    font-family: var(--esgri-font-display);
    font-size: 2rem;
    font-weight: 700;
    color: var(--esgri-color-ink);
    margin: 0 0 16px;
    line-height: 1.25;
    letter-spacing: -0.02em;
}

.esgri-rb-featured__meta {
    font-size: 0.85rem;
    color: var(--esgri-color-ink-muted);
    margin: 0 0 18px;
    font-weight: 400;
    line-height: 1.5;
}

.esgri-rb-featured__excerpt {
    font-size: 0.9rem;
    color: var(--esgri-color-ink-light);
    line-height: 1.65;
    max-width: 480px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.esgri-rb-featured__excerpt p {
    margin: 0;
}

/* ==========================================================================
   Load More Button
   ========================================================================== */
.esgri-rb-load-more {
    display: flex;
    justify-content: center;
    margin-top: 40px;
}

.esgri-rb-load-more-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 36px;
    font-family: var(--esgri-font-body);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--esgri-color-ink);
    background: transparent;
    border: 1.5px solid var(--esgri-color-ink);
    border-radius: 100px;
    cursor: pointer;
    transition: all 0.25s ease;
    letter-spacing: 0.02em;
}

.esgri-rb-load-more-btn:hover {
    background: var(--esgri-color-ink);
    color: #fff;
}

.esgri-rb-load-more-btn:disabled {
    border-color: var(--esgri-color-ink-muted);
    color: var(--esgri-color-ink-muted);
    cursor: not-allowed;
    background: transparent;
}

.esgri-rb-load-more-btn__arrow {
    transition: transform 0.25s ease;
}

.esgri-rb-load-more-btn:hover .esgri-rb-load-more-btn__arrow {
    transform: translateY(2px);
}

/* ==========================================================================
   Skeleton Loading
   ========================================================================== */
.esgri-rb-skeleton {
    border-radius: var(--esgri-radius);
    background: linear-gradient(90deg, #eee 25%, #e0e0e0 50%, #eee 75%);
    background-size: 200% 100%;
    animation: esgri-shimmer 1.5s infinite ease-in-out;
}

.esgri-rb-skeleton--card {
    aspect-ratio: 3618 / 2161;
}

.esgri-rb-skeleton--featured {
    height: 300px;
    border-radius: 0;
    background: linear-gradient(90deg, rgba(255,255,255,0.15) 25%, rgba(255,255,255,0.25) 50%, rgba(255,255,255,0.15) 75%);
    background-size: 200% 100%;
}

/* ==========================================================================
   Research Pillar Cards — 3-top + 2-bottom grid
   ========================================================================== */
.esgri-rb-pillars {
    max-width: 1280px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 4px;
}

.esgri-rb-pillar {
    grid-column: span 2;
    display: flex;
    flex-direction: column;
    text-decoration: none;
    color: var(--esgri-color-ink);
    background: var(--esgri-color-card);
    box-shadow: var(--esgri-shadow-sm);
    transition: box-shadow 0.3s ease;
}

.esgri-rb-pillar:hover {
    box-shadow: var(--esgri-shadow-md);
}

/* Image wrapper — overflow:hidden here (not on the card) prevents Chrome compositing bug */
.esgri-rb-pillar__img-wrap {
    flex-shrink: 0;
    height: 220px;
    overflow: hidden;
}

/* Image area */
.esgri-rb-pillar__img {
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    transition: transform 0.5s cubic-bezier(0.2, 0.9, 0.3, 1);
}

.esgri-rb-pillar:hover .esgri-rb-pillar__img {
    transform: scale(1.05);
}

/* Title bar */
.esgri-rb-pillar__label {
    background: var(--esgri-color-card);
    padding: 16px 20px 10px;
}

.esgri-rb-pillar__title {
    font-family: var(--esgri-font-display);
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--esgri-color-accent);
    margin: 0;
    line-height: 1.3;
}

/* Subtopic list */
.esgri-rb-pillar__topics {
    list-style: none;
    margin: 0;
    padding: 14px 20px 18px;
    display: flex;
    flex-direction: column;
    gap: 0;
    background: var(--esgri-color-card);
    flex: 1;
}

.esgri-rb-pillar__topics li {
    font-family: var(--esgri-font-body);
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--esgri-color-ink-light);
    line-height: 1.4;
    display: flex;
    align-items: baseline;
    gap: 6px;
}

.esgri-rb-pillar__topics li::before {
    content: '＞';
    color: var(--esgri-color-accent);
    font-size: 1.1rem;
    font-weight: 900;
    -webkit-text-stroke: 1px var(--esgri-color-accent);
    flex-shrink: 0;
    line-height: 1;
}

/* ==========================================================================
   Pillar Page Hero
   ========================================================================== */
.esgri-rp-hero {
    width: 100vw;
    position: relative;
    left: 50%;
    margin-left: -50vw;
    height: 380px;
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: flex-end;
    margin-bottom: 56px;
}

.esgri-rp-hero::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.72) 0%, rgba(0,0,0,0.25) 55%, transparent 100%);
}

.esgri-rp-hero__inner {
    position: relative;
    z-index: 1;
    max-width: 1140px;
    width: 100%;
    margin: 0 auto;
    padding: 0 24px 40px;
}

.esgri-rp-hero__eyebrow {
    font-size: 0.78rem;
    font-weight: 600;
    color: rgba(255,255,255,0.65);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin: 0 0 10px;
}

.esgri-rp-hero__title {
    font-family: var(--esgri-font-display);
    font-size: 2.2rem;
    font-weight: 700;
    color: #fff;
    margin: 0 0 20px;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.esgri-rp-topics {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    list-style: none;
    margin: 0;
    padding: 0;
}

.esgri-rp-topics li {
    background: rgba(255,255,255,0.18);
    color: #fff;
    padding: 5px 14px;
    font-size: 0.8rem;
    font-weight: 600;
    border-radius: 100px;
    letter-spacing: 0.01em;
}

@media (max-width: 768px) {
    .esgri-rp-hero {
        height: 280px;
        margin-bottom: 40px;
    }
    .esgri-rp-hero__title {
        font-size: 1.6rem;
    }
}

/* Pillar filter buttons */
.esgri-rp-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 32px;
}

.esgri-rp-filter {
    padding: 7px 18px;
    font-size: 0.83rem;
    font-weight: 600;
    border: 1.5px solid var(--esgri-color-ink-muted);
    border-radius: 100px;
    background: transparent;
    color: var(--esgri-color-ink-light);
    cursor: pointer;
    transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
    font-family: var(--esgri-font-body);
}

.esgri-rp-filter:hover,
.esgri-rp-filter.active {
    background: var(--esgri-color-accent);
    border-color: var(--esgri-color-accent);
    color: #fff;
}

/* Subtopic labels on card */
.esgri-rb-card__topics {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-top: 12px;
}

.esgri-rb-card__topic {
    display: inline-block;
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--esgri-color-accent);
    border: 1.5px solid var(--esgri-color-accent);
    border-radius: 100px;
    padding: 3px 10px;
    letter-spacing: 0.02em;
}

/* ==========================================================================
   Animations
   ========================================================================== */
@keyframes esgri-fade-up {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes esgri-shimmer {
    0%   { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 992px) {
    .esgri-rb-grid--3col {
        grid-template-columns: repeat(2, 1fr);
    }

    .esgri-rb-featured__title {
        font-size: 1.6rem;
    }

    .esgri-rb-pillar {
        grid-column: span 3;
    }
}

@media (max-width: 600px) {
    .esgri-rb-pillar {
        grid-column: span 6;
    }
}

@media (max-width: 768px) {
    .esgri-rb-page {
        padding: 0 16px 60px;
    }

    .esgri-rb-grid--2col,
    .esgri-rb-grid--3col {
        grid-template-columns: 1fr;
    }

    .esgri-rb-popular {
        padding: 36px 16px 40px;
    }

    .esgri-rb-popular-inner {
        flex-direction: column;
    }

    .esgri-rb-ep,
    .esgri-rb-pop {
        flex: none;
        width: 100%;
    }

    .esgri-rb-popular .esgri-rb-section-title {
        padding-left: 20px;
    }

    .esgri-rb-featured {
        flex-direction: column;
        min-height: auto;
        padding: 20px;
    }

    .esgri-rb-featured__image {
        flex: none;
        aspect-ratio: 3618 / 2161;
        border-radius: 0;
    }

    .esgri-rb-featured__content {
        padding: 24px 0 0;
    }

    .esgri-rb-featured__title {
        font-size: 1.4rem;
    }

    .esgri-rb-page-title {
        font-size: 1.65rem;
    }
}