/* =========================================================
   SIDHARTHA RESEARCH
   research.css
   ========================================================= */

/* =========================================================
   01. HEADER / GLOBAL NAVIGATION
   ========================================================= */

.nav a {
    display: inline-flex;
    align-items: center;
    padding: 8px 14px;
    color: #0F2C52;
    text-decoration: none;
    border-radius: 4px;
    transition:
        background-color 0.2s ease,
        color 0.2s ease;
}

.nav a:hover {
    color: #1656A6;
}

.nav a.active {
    background-color: #1656A6;
    color: #FFFFFF;
}


/* =========================================================
   02. RESEARCH LAYOUT
   ========================================================= */

.reader {
    width: min(calc(100% - 48px), 1500px);
    margin: auto;
    display: grid;
    grid-template-columns: 290px minmax(0, 1fr);
}

.sidebar {
    position: sticky;
    top: 76px;
    height: calc(100vh - 76px);
    overflow: auto;
    padding: 28px 18px 30px 0;
    border-right: 1px solid var(--line);
    background: #fff;
}

.content {
    min-width: 0;
    padding: 42px clamp(34px, 5vw, 92px) 70px;
}

.content-inner {
    max-width: 1110px;
    margin: auto;
}

.breadcrumb {
    font-size: 11px;
    color: #667085;
    margin-bottom: 25px;
}

.breadcrumb strong {
    color: var(--blue);
}

.section {
    scroll-margin-top: 98px;
    padding-bottom: 60px;
    margin-bottom: 60px;
    border-bottom: 1px solid var(--line);
}


/* =========================================================
   03. TABLE OF CONTENTS
   ========================================================= */

.toc-title {
    font-size: 13px;
    font-weight: 700;
    margin: 0 0 14px;
    color: #12396b;
}

.toc {
    display: grid;
    gap: 1px;
}

.toc a {
    display: grid;
    grid-template-columns: 28px 1fr 12px;
    gap: 7px;
    padding: 9px;
    border-left: 2px solid transparent;
    color: #3d5575;
}

.toc a:hover,
.toc a.active {
    border-left-color: var(--blue);
    background: #eef5fc;
    color: #0d3263;
}

.toc .num {
    font-size: 10px;
    font-weight: 800;
}

.toc .label {
    font-size: 12px;
    line-height: 1.3;
}

.toc .en {
    display: none;
    margin-top: 2px;
    color: #8190a3;
    font-size: 9px;
}

.toc .arrow {
    font-size: 15px;
}

.icon {
    width: 18px;
    height: 18px;
    display: block;
    stroke: currentColor;
    fill: none;
    stroke-width: 1.7;
}


/* =========================================================
   04. TYPOGRAPHY
   ========================================================= */

.eyebrow,
.section-eyebrow {
    margin: 0 0 11px;
    color: var(--blue);
    font-size: 10px;
    font-weight: 800;
    letter-spacing: .17em;
    text-transform: uppercase;
}

.section-subtitle,
.subtitle-en {
    display: block;
    margin: 7px 0 26px;
    color: #7488a6;
    font-family: var(--display);
    font-size: clamp(20px, 2vw, 28px);
    line-height: 1.25;
}

h1,
h2,
h3 {
    font-family: var(--display);
    font-weight: 400;
    line-height: 1.08;
    margin: 0;
}

h1 {
    font-size: clamp(40px, 4vw, 58px);
}

h2 {
    font-size: clamp(31px, 3vw, 45px);
}

h3 {
    font-size: 24px;
    margin: 30px 0 15px;
}

.research-copy {
    font-family: var(--display);
    color: #3f5878;
    font-size: 18px;
    line-height: 1.62;
}

.research-copy p {
    margin: 0 0 19px;
}

.research-copy ul {
    margin: 0 0 22px 22px;
    padding: 0;
}

.research-copy li {
    margin: 0 0 8px;
}

.research-copy pre {
    white-space: pre-wrap;
    background: #f5f8fb;
    border-left: 3px solid var(--blue);
    padding: 14px 16px;
    font: 13px/1.55 ui-monospace, SFMono-Regular, Menlo, monospace;
    color: #24446d;
    overflow: auto;
}

.source-caption {
    margin: 14px 0;
    color: #587195;
    font-size: 11px;
    font-weight: 700;
}

.research-copy > p,
.research-copy article p {
    text-align: justify;
    hyphens: auto;
}

.research-question {
    text-align: center !important;
    font-style: italic;
    font-size: 1.05em;
    margin: 2rem 0;
}


/* =========================================================
   05. LANGUAGE
   ========================================================= */

.lang .active {
    background: var(--blue);
    color: #fff;
}

[data-language="en"] .toc .en {
    display: block;
}

[data-language="en"] .copy-es {
    display: none;
}

[data-language="en"] .copy-en {
    display: block;
}

[data-language="en"] .toc .label-es {
    display: none;
}

[data-language="en"] .toc .label-en {
    display: block;
}

[data-language="es"] .label-en,
[data-language="es"] .copy-en {
    display: none;
}

.copy-en {
    display: none;
}

[data-language="es"] .subtitle-en {
    display: none;
}

[data-language="en"] .subtitle-en {
    display: block;
}

.lang-note {
    padding: 14px;
    background: #f5f8fb;
    border: 1px solid var(--line);
    color: #667085;
    font: 13px/1.5 var(--body);
}


/* =========================================================
   06. CALLOUTS
   ========================================================= */

.callout {
    margin: 28px 0;
    padding: 20px 23px;
    border-left: 3px solid var(--blue);
    background: #eef5fc;
}

.callout-label {
    font-size: 10px;
    font-weight: 800;
    letter-spacing: .12em;
    color: var(--blue);
    text-transform: uppercase;
    margin-bottom: 7px;
}

.callout p {
    margin: 0;
    font-family: var(--display);
    font-size: 19px;
    line-height: 1.45;
}

.research-callout {
    margin: 28px 0;
    padding: 20px 23px;
    border-left: 3px solid var(--blue);
    background: #eef5fc;
}

.research-callout p {
    margin: 0 0 12px;
    font-family: var(--display);
    color: var(--ink);
    font-size: 19px;
    line-height: 1.45;
}

.research-callout p:last-child {
    margin-bottom: 0;
}


/* =========================================================
   07. HOSPITAL — STRUCTURED CONTENT
   ========================================================= */

.observation-reasons {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
    margin: 24px 0 34px;
}

.observation-reason {
    padding: 20px 22px;
    border: 1px solid var(--line);
    background: #f8fbfe;
}

.observation-reason h4 {
    margin: 0 0 9px;
    color: var(--blue);
    font-family: var(--body);
    font-size: 13px;
    font-weight: 800;
}

.observation-reason p {
    margin: 0;
    font-family: var(--display);
    font-size: 16px;
    line-height: 1.5;
    color: #3f5878;
}


/* =========================================================
   08. TABLES
   ========================================================= */

.table-wrapper {
    width: 100%;
    overflow-x: auto;
    margin: 22px 0 8px;
}

.research-table {
    width: max-content;
    max-width: 100%;
    border-collapse: collapse;
    background: #fff;
    font-family: var(--body);
    font-size: 14px;
}

.research-table th {
    padding: 13px 15px;
    background: #eef5fc;
    border: 1px solid #cfdbe8;
    color: #12396b;
    text-align: center;
    font-weight: 800;
}

.research-table td {
    padding: 14px 15px;
    border: 1px solid var(--line);
    color: #435d7c;
    line-height: 1.45;
    vertical-align: top;
}

.research-table tbody tr:nth-child(even) {
    background: #fafcfe;
}

.research-table td:first-child {
    color: #12396b;
    font-weight: 700;
    white-space: nowrap;
}

.research-table--center-234 td:nth-child(2),
.research-table--center-234 td:nth-child(3),
.research-table--center-234 td:nth-child(4) {
    text-align: center;
}

.research-table--center--2 td:nth-child(2) {
    text-align: center;
}

/* =========================================================
   09. ESI LEVELS
   ========================================================= */

.esi-levels {
    display: grid;
    gap: 10px;
    margin: 22px 0 28px;
}

.esi-level {
    display: grid;
    grid-template-columns: 90px 1fr;
    align-items: center;
    gap: 18px;
    padding: 15px 18px;
    border: 1px solid var(--line);
    background: #f8fbfe;
}

.esi-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 38px;
    padding: 0 10px;
    background: #e8f2fc;
    color: var(--blue);
    font-family: var(--body);
    font-size: 12px;
    font-weight: 800;
    letter-spacing: .04em;
}

.esi-level h4 {
    margin: 0 0 3px;
    color: #12396b;
    font-family: var(--body);
    font-size: 13px;
    font-weight: 800;
}

.esi-level p {
    margin: 0;
    color: #526b8a;
    font-family: var(--display);
    font-size: 15px;
    line-height: 1.4;
}


/* =========================================================
   10. FIGURES
   ========================================================= */

.figure,
.research-figure {
    margin: 30px 0 38px;
    padding: 14px;
    border: 1px solid var(--line);
    background: #f7fafd;
}

.figure img,
.research-figure img {
    display: block;
    width: 100%;
    height: auto;
    object-fit: contain;
}

.figure figcaption,
.research-figure figcaption {
    padding: 11px 4px 2px;
    color: #587195;
    font-family: var(--body);
    font-size: 11px;
    font-weight: 700;
    line-height: 1.4;
}


/* =========================================================
   11. RESEARCH SUBSECTIONS
   ========================================================= */

.research-subsection-block {
    margin: 38px 0 48px;
}

.research-subsection-block h3 {
    margin: 0 0 16px;
    font-family: var(--display);
    font-size: 24px;
    font-weight: 400;
    line-height: 1.15;
    color: var(--ink);
}

.research-subsection-block p {
    margin: 0 0 19px;
    font-family: var(--display);
    color: #3f5878;
    font-size: 17px;
    line-height: 1.62;
}

.research-subsection-block ul {
    margin: 0 0 22px 22px;
    padding: 0;
    color: #3f5878;
    font-family: var(--display);
    font-size: 17px;
    line-height: 1.62;
}

.research-subsection-block li {
    margin: 0 0 8px;
}


/* =========================================================
   12. RESEARCH FLOW
   ========================================================= */

.research-flow {
    display: flex;
    flex-direction: column;
    gap: 14px;
    margin: 28px 0 36px;
}

.flow-step {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 18px;
    border: 1px solid var(--line);
    border-radius: 6px;
    background: #f7fafd;
}

.flow-letter {
    display: flex;
    align-items: center;
    justify-content: center;
    flex: 0 0 42px;
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: var(--blue);
    color: #ffffff;
    font-family: var(--body);
    font-size: 15px;
    font-weight: 700;
}

.flow-content {
    min-width: 0;
}

.flow-content h3 {
    margin: 0 0 4px;
    color: var(--ink);
    font-family: var(--display);
    font-size: 18px;
    line-height: 1.25;
}

.flow-content p {
    margin: 0;
    color: #587195;
    font-family: var(--body);
    font-size: 14px;
    line-height: 1.5;
}


/* =========================================================
   13. METHODOLOGY SUBMENU
   ========================================================= */

.toc-parent {
    position: relative;
}

.toc-subitems {
    display: block;
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    margin-left: 28px;
    padding-left: 18px;
    border-left: 2px solid #1d5fbf;
    transition:
        max-height 0.25s ease,
        opacity 0.2s ease;
}

.toc-parent:hover .toc-subitems {
    max-height: 500px;
    opacity: 1;
}

.toc-subitems a {
    display: block;
    padding: 10px 12px;
    font-size: 0.88rem;
    line-height: 1.35;
    text-decoration: none;
}

.toc-subitems .label-es,
.toc-subitems .label-en {
    white-space: nowrap;
}


/* =========================================================
   14. SEARCH
   ========================================================= */

.search-panel {
    position: fixed;
    inset: 76px 0 auto 0;
    z-index: 40;
    display: none;
    padding: 13px;
    background: #fff;
    border-bottom: 1px solid var(--line);
    box-shadow: 0 8px 24px rgba(7, 19, 33, .06);
}

.search-panel.open {
    display: block;
}

.search-inner {
    width: min(calc(100% - 28px), 820px);
    margin: auto;
}

.search-input {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--line);
    background: #f7fafd;
    outline: 0;
}

.search-input:focus {
    border-color: var(--blue);
}

.search-results {
    max-height: 260px;
    overflow: auto;
}

.search-result {
    display: block;
    padding: 10px;
    border-bottom: 1px solid var(--line);
    font-size: 12px;
}

.search-result strong {
    color: var(--blue);
}


/* =========================================================
   15. CHAPTER NAVIGATION
   ========================================================= */

.chapter-nav {
    display: flex;
    justify-content: space-between;
    gap: 15px;
    margin-top: 42px;
}

.chapter-nav a {
    padding: 12px 15px;
    border: 1px solid var(--line);
    font-size: 11px;
    color: #48617f;
}

.chapter-nav a:last-child {
    background: var(--blue);
    border-color: var(--blue);
    color: #fff;
}


/* =========================================================
   16. IMAGE VIEWER
   ========================================================= */

.research-image-button {
    position: relative;
    display: block;
    width: 100%;
    margin: 0;
    padding: 0;
    border: 0;
    background: transparent;
    cursor: zoom-in;
}

.research-image-button img {
    display: block;
    width: auto;
    max-width: 100%;
    max-height: 70vh;
    height: auto;
    margin: 0 auto;
    object-fit: contain;
}

.research-image-zoom {
    position: absolute;
    right: 14px;
    bottom: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: rgba(7, 19, 33, 0.78);
    color: #ffffff;
    font-family: Arial, sans-serif;
    font-size: 21px;
    opacity: 0;
    transition:
        opacity 0.2s ease,
        transform 0.2s ease;
}

.research-image-button:hover .research-image-zoom,
.research-image-button:focus-visible .research-image-zoom {
    opacity: 1;
}

.research-image-button:hover .research-image-zoom {
    transform: scale(1.05);
}

.research-image-viewer {
    position: fixed;
    inset: 0;
    z-index: 10000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 40px;
    background: rgba(7, 19, 33, 0.94);
}

.research-image-viewer.is-visible {
    display: flex;
}

.research-image-viewer-content {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
    height: 100%;
    max-width: 1600px;
    max-height: 100%;
}

.research-image-viewer-content img {
    display: block;
    max-width: 96%;
    max-height: 88vh;
    width: auto;
    height: auto;
    object-fit: contain;
    background: #ffffff;
    box-shadow:
        0 20px 60px rgba(0, 0, 0, 0.35);
}

.research-image-viewer-content p {
    margin: 14px 0 0;
    color: #ffffff;
    font-family: var(--body);
    font-size: 13px;
    text-align: center;
}

.research-image-viewer-close {
    position: fixed;
    top: 22px;
    right: 28px;
    z-index: 10001;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    padding: 0;
    border: 1px solid rgba(255, 255, 255, 0.55);
    border-radius: 50%;
    background: rgba(7, 19, 33, 0.75);
    color: #ffffff;
    font-family: Arial, sans-serif;
    font-size: 30px;
    line-height: 1;
    cursor: pointer;
}

.research-image-viewer-close:hover {
    background: rgba(255, 255, 255, 0.15);
}


/* =========================================================
   17. REFERENCES
   ========================================================= */

.references-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-top: 2rem;
}

.reference-item {
    display: grid;
    grid-template-columns: 48px minmax(0, 1fr);
    gap: 1rem;
    padding: 1.25rem 1.5rem;
    border: 1px solid var(--line);
    border-radius: 12px;
    background: var(--white);
    scroll-margin-top: 100px;
}

.reference-number {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding-top: 0.15rem;
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--blue);
}

.reference-content {
    display: contents;
}

.reference-text {
    grid-column: 2;
    margin: 0;
    line-height: 1.75;
}

.reference-actions {
    grid-column: 1 / -1;
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    margin-top: 0.75rem;
    padding-top: 0.9rem;
    border-top: 1px solid var(--line);
}

.reference-actions a {
    white-space: nowrap;
}

.reference-link,
.reference-return {
    font-size: 0.9rem;
    font-weight: 600;
    text-decoration: none;
}

.reference-link {
    color: var(--blue);
    overflow-wrap: anywhere;
}

.reference-return {
    color: var(--muted);
}

.reference-link:hover,
.reference-return:hover {
    text-decoration: underline;
}


/* =========================================================
   18. CITATIONS / REFERENCE USAGE
   ========================================================= */

.citation {
    color: var(--blue);
    font-size: 0.82em;
    font-weight: 500;
    line-height: 1.4;
    text-decoration: none;
    text-decoration-thickness: 1px;
    text-underline-offset: 2px;
    white-space: nowrap;
}

.citation:hover {
    text-decoration: underline;
}

.citation-external::after {
    font-size: 0.8em;
}

.reference-usage {
    grid-column: 2;
    margin-top: 1rem;
}

.reference-usage-title {
    margin: 0 0 0.5rem;
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--muted);
}

.reference-usage-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem 1.5rem;
}

.reference-usage-link {
    color: var(--blue);
    font-size: 0.9rem;
    font-weight: 600;
    text-decoration: none;
}

.reference-usage-link:hover {
    text-decoration: underline;
}


/* =========================================================
   19. RESPONSIVE — TABLET
   ========================================================= */

@media (max-width: 900px) {
    .reader {
        width: calc(100% - 32px);
        grid-template-columns: 1fr;
    }

    .sidebar {
        position: sticky;
        height: auto;
        max-height: 280px;
        top: 76px;
        padding: 15px 0;
        border-right: 0;
        border-bottom: 1px solid var(--line);
    }

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

    .content {
        padding: 38px 0 60px;
    }
}

@media (max-width: 760px) {
    .observation-reasons {
        grid-template-columns: 1fr;
    }

    .esi-level {
        grid-template-columns: 72px 1fr;
        gap: 12px;
    }

    .research-table {
        min-width: 680px;
    }

    .research-image-viewer {
        padding: 20px;
    }

    .research-image-viewer-content img {
        max-width: 100%;
        max-height: 84vh;
    }

    .research-image-viewer-close {
        top: 12px;
        right: 12px;
        width: 40px;
        height: 40px;
        font-size: 27px;
    }
}


/* =========================================================
   20. RESPONSIVE — MOBILE
   ========================================================= */

@media (max-width: 768px) {
    .reference-item {
        grid-template-columns: 36px minmax(0, 1fr);
        padding: 1rem;
        gap: 0.75rem;
    }

    .reference-text {
        grid-column: 2;
    }

    .reference-actions {
        grid-column: 1 / -1;
        align-items: flex-start;
        flex-direction: column;
        justify-content: flex-start;
        gap: 0.6rem;
    }

    .reference-actions a {
        white-space: normal;
    }
}

@media (max-width: 600px) {
    .reader {
        width: calc(100% - 28px);
    }

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

    .content {
        padding-top: 28px;
    }

    .chapter-nav {
        flex-direction: column;
    }

    .chapter-nav a {
        width: 100%;
    }
}