@font-face {
    font-family: 'Fira Sans';
    src: url('../fonts/papers/FiraSans-Regular.ttf') format('truetype');
    font-weight: 400;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'Fira Sans';
    src: url('../fonts/papers/FiraSans-SemiBold.ttf') format('truetype');
    font-weight: 600;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'Fira Sans';
    src: url('../fonts/papers/FiraSans-Bold.ttf') format('truetype');
    font-weight: 700;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'Metropolis';
    src: url('../fonts/papers/Metropolis-Regular.otf') format('opentype');
    font-weight: 400;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'Metropolis';
    src: url('../fonts/papers/Metropolis-SemiBold.otf') format('opentype');
    font-weight: 600;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'Metropolis';
    src: url('../fonts/papers/Metropolis-Bold.otf') format('opentype');
    font-weight: 700;
    font-style: normal;
    font-display: swap;
}

:root {
    --papers-ink: #2C3852;
    --papers-navy: #2C3852;
    --papers-sky: #B6CBD8;
    --papers-blue: #97AACB;
    --papers-pale: #D9E3F3;
    --papers-cream: #EDF5F9;
    --papers-sand: #D5B895;
    --papers-gold: #C19770;
    --papers-line: #D9E3F3;
    --papers-muted: rgba(44, 56, 82, .72);
}

.papers-page {
    background: #fff;
    color: var(--papers-ink);
    font-family: 'Fira Sans', sans-serif;
}

.papers-main,
.paper-reader-main {
    width: 100%;
    padding-top: 0px;
}

.paper-reader-main {
    background: #fff;
}

.papers-shell {
    width: min(1180px, calc(100% - 40px));
    margin-inline: auto;
}

.papers-hero {
    padding: 92px 0 88px;
    background: var(--papers-navy);
    color: #fff;
}

.papers-eyebrow {
    display: inline-block;
    margin-bottom: 14px;
    color: var(--papers-gold);
    font-size: .76rem;
    font-weight: 800;
    letter-spacing: .14em;
    text-transform: uppercase;
}

.papers-hero h1 {
    max-width: 780px;
    margin: 0;
    color: #fff;
    font: 600 clamp(1.8rem, 5vw, 4rem)/1.02 'Metropolis', sans-serif;
    letter-spacing: -.035em;
}

.papers-hero p {
    max-width: 600px;
    margin: 24px 0 0;
    color: #D9E3F3;
    font-size: 1rem;
}

.papers-library {
    padding: 74px 0 88px;
}

.papers-heading-row {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 20px;
}

.papers-heading-row h2 {
    margin: 0;
    font: 600 clamp(2rem, 3.5vw, 3rem)/1.1 'Metropolis', sans-serif;
}

.papers-count {
    color: var(--papers-muted);
}

.papers-filters {
    display: grid;
    grid-template-columns: minmax(220px, 1fr) 260px auto auto;
    align-items: end;
    gap: 14px;
    margin: 36px 0 44px;
    padding: 22px;
    background: var(--papers-cream);
    border: 1px solid var(--papers-line);
}

.papers-filters label {
    display: grid;
    gap: 7px;
    color: var(--papers-muted);
    font-size: .75rem;
    font-weight: 700;
    letter-spacing: .08em;
    text-transform: uppercase;
}

.papers-filters input,
.papers-filters select {
    width: 100%;
    height: 46px;
    padding: 0 13px;
    border: 1px solid var(--papers-sky);
    border-radius: 2px;
    background: #fff;
    color: var(--papers-ink);
    font: inherit;
    text-transform: none;
    letter-spacing: 0;
}

.papers-filters button,
.paper-download {
    min-height: 46px;
    padding: 12px 22px;
    border: 1px solid var(--papers-navy);
    border-radius: 2px;
    background: var(--papers-navy);
    color: #fff;
    font-weight: 700;
    text-decoration: none;
}

.papers-clear {
    min-height: 46px;
    display: inline-flex;
    align-items: center;
    color: var(--papers-navy);
    font-weight: 600;
}

.papers-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    border-top: 1px solid var(--papers-line);
    border-left: 1px solid var(--papers-line);
}

.paper-card {
    position: relative;
    min-height: 390px;
    border-right: 1px solid var(--papers-line);
    border-bottom: 1px solid var(--papers-line);
    background: #fff;
    transition: background .2s ease, transform .2s ease;
}

.paper-card:hover {
    z-index: 1;
    background: var(--papers-cream);
    transform: translateY(-3px);
}

.paper-card-link {
    display: flex;
    height: 100%;
    padding: 30px;
    flex-direction: column;
    color: inherit;
    text-decoration: none;
}

.paper-card-topline {
    display: flex;
    justify-content: space-between;
    gap: 14px;
    color: var(--papers-muted);
    font-size: .73rem;
    font-weight: 700;
    letter-spacing: .07em;
    text-transform: uppercase;
}

.paper-card h3 {
    margin: 34px 0 10px;
    color: var(--papers-ink);
    font: 600 1.85rem/1.12 'Metropolis', sans-serif;
}

.paper-subtitle {
    margin: 0 0 16px;
    color: var(--papers-navy);
    font-weight: 600;
}

.paper-summary {
    display: -webkit-box;
    overflow: hidden;
    margin: 0;
    color: var(--papers-muted);
    line-height: 1.65;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 4;
}

.paper-card-footer {
    display: flex;
    align-items: end;
    justify-content: space-between;
    gap: 16px;
    margin-top: auto;
    padding-top: 28px;
    color: var(--papers-muted);
    font-size: .86rem;
}

.paper-card-footer strong {
    flex: 0 0 auto;
    color: var(--papers-navy);
}

.paper-formats {
    position: absolute;
    top: 66px;
    right: 29px;
    display: flex;
    gap: 5px;
}

.paper-formats span {
    padding: 3px 6px;
    border: 1px solid var(--papers-sky);
    color: var(--papers-muted);
    font-size: .64rem;
    font-weight: 800;
}

.papers-empty {
    padding: 70px 20px;
    border: 1px solid var(--papers-line);
    text-align: center;
}

.papers-empty h3 {
    font: 600 1.8rem 'Metropolis', sans-serif;
}

.papers-pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 40px;
}

.papers-pagination a {
    display: grid;
    width: 42px;
    height: 42px;
    place-items: center;
    border: 1px solid var(--papers-line);
    color: var(--papers-ink);
    text-decoration: none;
}

.papers-pagination a[aria-current="page"] {
    border-color: var(--papers-navy);
    background: var(--papers-navy);
    color: #fff;
}

.paper-reader-header {
    padding: 58px 0 44px;
    border-bottom: 1px solid var(--papers-line);
    background: var(--papers-cream);
}

.paper-back {
    display: block;
    margin-bottom: 36px;
    color: var(--papers-navy);
    font-weight: 700;
    text-decoration: none;
}

.paper-reader-header h1 {
    max-width: 850px;
    margin: 0;
    color: var(--papers-ink);
    font: 600 clamp(2.3rem, 5vw, 4.2rem)/1.04 'Metropolis', sans-serif;
    letter-spacing: -.025em;
}

.paper-reader-subtitle {
    margin: 14px 0 0;
    color: var(--papers-navy);
    font: 400 1.35rem/1.4 'Metropolis', sans-serif;
}

.paper-reader-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 24px;
    margin: 28px 0;
    color: var(--papers-muted);
}

.paper-reader-meta span+time::before,
.paper-reader-meta time+span::before {
    content: '•';
    margin-right: 24px;
    color: var(--papers-gold);
}

.paper-download {
    display: inline-flex;
    align-items: center;
}

.paper-reader-layout {
    display: grid;
    grid-template-columns: 250px minmax(0, 1fr);
    align-items: start;
    gap: 38px;
    padding-top: 40px;
    padding-bottom: 70px;
}

.paper-reader-layout-html {
    width: min(1396px, calc(100% - 40px));
    grid-template-columns: minmax(0, 250px) minmax(0, 820px) minmax(0, 250px);
    justify-content: center;
}

.paper-reader-layout-html .paper-toc {
    grid-column: 1;
}

.paper-html-content {
    grid-column: 2;
    justify-self: center;
    width: 100%;
    max-width: 820px;
    min-width: 0;
    padding: 0 0 40px;
    background: #fff;
}

.paper-toc {
    position: sticky;
    top: 96px;
    max-height: calc(100vh - 120px);
    overflow: auto;
    border-left: 2px solid var(--papers-line);
}

.paper-toc-nav {
    display: grid;
    gap: 2px;
}

.paper-toc-nav strong {
    padding: 8px 18px 14px;
    color: var(--papers-muted);
    font-size: .72rem;
    letter-spacing: .1em;
    text-transform: uppercase;
}

.paper-toc-nav a {
    padding: 9px 18px;
    border-left: 2px solid transparent;
    color: var(--papers-muted);
    line-height: 1.35;
    text-decoration: none;
    transform: translateX(-2px);
}

.paper-toc-nav a:hover,
.paper-toc-nav a.is-active {
    border-left-color: var(--papers-gold);
    color: var(--papers-ink);
}

.paper-toc-nav .toc-level-2 {
    padding-left: 30px;
    font-size: .9rem;
}

.paper-toc-nav .toc-level-3 {
    padding-left: 42px;
    font-size: .84rem;
}

.paper-toc-toggle {
    display: none;
}

.paper-pdf-only {
    padding-top: 38px;
    padding-bottom: 70px;
}

.paper-pdf-notice {
    margin-bottom: 18px;
    padding: 13px 16px;
    border-left: 4px solid var(--papers-gold);
    background: var(--papers-cream);
}

.paper-pdf-only iframe {
    width: 100%;
    height: 82vh;
    border: 1px solid var(--papers-line);
}

.paper-pdf-only p {
    color: var(--papers-muted);
}

@media (max-width: 980px) {
    .paper-reader-layout-html {
        width: min(100% - 40px, 820px);
    }

    .paper-reader-layout-html .paper-toc,
    .paper-html-content {
        grid-column: 1;
    }

    .papers-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .papers-filters {
        grid-template-columns: 1fr 1fr;
    }

    .paper-reader-layout {
        grid-template-columns: 1fr;
        gap: 18px;
    }

    .paper-toc {
        position: static;
        max-height: none;
        border: 1px solid var(--papers-line);
    }

    .paper-toc-toggle {
        display: flex;
        width: 100%;
        padding: 14px 16px;
        align-items: center;
        justify-content: space-between;
        border: 0;
        background: var(--papers-cream);
        color: var(--papers-ink);
        font-weight: 600;
    }

    .paper-toc-nav {
        display: none;
        padding: 8px 0 14px;
    }

    .paper-toc-nav.is-open {
        display: grid;
    }
}

@media (max-width: 640px) {

    .papers-main,
    .paper-reader-main {
        padding-top: 0px;
    }

    .papers-shell {
        width: min(100% - 28px, 1180px);
    }

    .papers-hero {
        padding: 60px 0;
    }

    .papers-library {
        padding: 50px 0 64px;
    }

    .papers-heading-row {
        display: block;
    }

    .papers-count {
        display: block;
        margin-top: 12px;
    }

    .papers-filters {
        grid-template-columns: 1fr;
        padding: 16px;
    }

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

    .paper-card {
        min-height: 350px;
    }

    .paper-card-link {
        padding: 24px;
    }

    .paper-card h3 {
        font-size: 1.6rem;
    }

    .paper-reader-header {
        padding: 38px 0 34px;
    }

    .paper-reader-meta {
        display: grid;
        gap: 7px;
    }

    .paper-reader-meta span+time::before,
    .paper-reader-meta time+span::before {
        content: none;
    }

    .paper-reader-layout {
        width: 100%;
        padding-top: 14px;
    }

    .paper-toc {
        margin-inline: 14px;
    }
}