:root {
    --bg: #f6f2ea;
    --bg-alt: #ebe5da;
    --surface: rgba(255, 255, 252, 0.88);
    --surface-muted: rgba(247, 243, 236, 0.92);
    --text: #202631;
    --muted: #5c6472;
    --accent: #1f6f60;
    --accent-strong: #155247;
    --border: rgba(32, 38, 49, 0.1);
    --border-strong: rgba(31, 111, 96, 0.28);
    --shadow: 0 14px 32px rgba(32, 38, 49, 0.08);
    --radius-xl: 24px;
    --radius-lg: 18px;
    --radius-md: 14px;
    --max-width: 1240px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    min-height: 100vh;
    color: var(--text);
    font-family: "Newsreader", Georgia, serif;
    background: linear-gradient(180deg, var(--bg) 0%, var(--bg-alt) 100%);
}

button,
input,
a {
    font: inherit;
}

img {
    max-width: 100%;
}

.page-shell {
    width: min(calc(100% - 32px), var(--max-width));
    margin: 0 auto;
    padding: 28px 0 44px;
}

.panel-shell {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow);
}

.topbar,
.library-panel,
.viewer-panel,
.page-footer,
.noscript-note {
    padding: 28px;
}

.topbar {
    display: grid;
    grid-template-columns: minmax(0, 1.5fr) minmax(300px, 0.95fr);
    gap: 28px;
    margin-bottom: 20px;
}

.topbar-side {
    display: grid;
    gap: 18px;
    align-content: start;
}

.eyebrow,
.section-kicker,
.summary-label,
.meta-pill,
.filter-pill,
.doc-topline,
.doc-file,
.quick-link,
.viewer-actions a,
.doc-group-count {
    font-family: "Space Grotesk", "Trebuchet MS", sans-serif;
}

.eyebrow,
.section-kicker {
    margin: 0;
    color: var(--accent);
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

h1,
h2,
h3,
h4 {
    margin: 0;
    font-family: "Space Grotesk", "Trebuchet MS", sans-serif;
    line-height: 1.08;
}

h1 {
    max-width: 12ch;
    margin-top: 14px;
    font-size: clamp(2.7rem, 6vw, 4.3rem);
    letter-spacing: -0.05em;
}

.lead,
.library-copy,
.library-status,
.viewer-summary,
.page-footer p,
.noscript-note,
.loading-state,
.empty-state,
.file-protocol-note,
.doc-button p,
.markdown-body p,
.markdown-body li,
.markdown-body blockquote {
    color: var(--muted);
    font-size: 1rem;
    line-height: 1.65;
}

.lead {
    max-width: 58ch;
    margin: 20px 0 0;
    font-size: 1.14rem;
}

.summary-strip {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
}

.summary-item {
    padding: 16px 18px;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--surface-muted);
}

.summary-label {
    display: block;
    margin-bottom: 10px;
    color: var(--muted);
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.summary-item strong {
    font-family: "Space Grotesk", "Trebuchet MS", sans-serif;
    font-size: 1.15rem;
}

.quick-access {
    display: grid;
    gap: 12px;
}

.quick-link-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.quick-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: var(--surface-muted);
    color: var(--text);
    text-decoration: none;
    transition: background 160ms ease, border-color 160ms ease;
}

.quick-link:hover,
.quick-link:focus-visible {
    background: rgba(31, 111, 96, 0.08);
    border-color: var(--border-strong);
}

.workspace-grid {
    display: grid;
    grid-template-columns: minmax(300px, 340px) minmax(0, 1fr);
    gap: 20px;
    align-items: start;
}

.library-panel {
    position: sticky;
    top: 20px;
}

.library-header {
    display: grid;
    gap: 8px;
    margin-bottom: 18px;
}

.library-header h2,
.viewer-header h2 {
    font-size: clamp(1.8rem, 3vw, 2.5rem);
    letter-spacing: -0.04em;
}

.library-copy,
.library-status {
    margin: 0;
}

.library-status {
    font-size: 0.92rem;
}

.search-field {
    display: block;
    margin-bottom: 12px;
}

.search-field input {
    width: 100%;
    padding: 13px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: #fffdf8;
    color: var(--text);
}

.search-field input:focus {
    outline: 2px solid rgba(31, 111, 96, 0.14);
    border-color: var(--border-strong);
}

.filter-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 18px;
    padding-bottom: 18px;
    border-bottom: 1px solid var(--border);
}

.filter-pill {
    padding: 9px 12px;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: transparent;
    color: var(--text);
    cursor: pointer;
    transition: background 160ms ease, border-color 160ms ease, color 160ms ease;
}

.filter-pill:hover,
.filter-pill:focus-visible {
    background: rgba(31, 111, 96, 0.06);
    border-color: var(--border-strong);
}

.filter-pill.is-active {
    background: var(--accent);
    border-color: var(--accent);
    color: #fffdf8;
}

.doc-list {
    display: grid;
    gap: 18px;
}

.doc-group {
    display: grid;
    gap: 10px;
}

.doc-group-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}

.doc-group-title {
    font-size: 1rem;
    letter-spacing: -0.02em;
}

.doc-group-count {
    color: var(--muted);
    font-size: 0.84rem;
}

.doc-button {
    width: 100%;
    padding: 14px 16px;
    text-align: left;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    background: #fffdf8;
    cursor: pointer;
    transition: border-color 160ms ease, background 160ms ease, box-shadow 160ms ease;
}

.doc-button:hover,
.doc-button:focus-visible {
    border-color: var(--border-strong);
    background: #ffffff;
    box-shadow: 0 8px 18px rgba(32, 38, 49, 0.06);
}

.doc-button.is-active {
    border-color: var(--accent);
    background: rgba(31, 111, 96, 0.08);
    box-shadow: inset 0 0 0 1px rgba(31, 111, 96, 0.12);
}

.doc-topline {
    display: flex;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 8px;
    color: var(--muted);
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}

.doc-button strong {
    display: block;
    font-family: "Space Grotesk", "Trebuchet MS", sans-serif;
    font-size: 1rem;
    line-height: 1.3;
}

.doc-button p {
    margin: 8px 0 10px;
    font-size: 0.94rem;
}

.doc-file {
    display: inline-flex;
    color: var(--muted);
    font-size: 0.8rem;
}

.viewer-panel {
    min-height: 820px;
}

.file-protocol-note {
    margin-bottom: 18px;
    padding: 13px 14px;
    border-radius: var(--radius-md);
    border: 1px solid rgba(173, 103, 61, 0.24);
    background: rgba(255, 243, 232, 0.88);
}

.viewer-header {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 20px;
    align-items: start;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border);
}

.viewer-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 14px;
}

.meta-pill {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 7px 11px;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: var(--surface-muted);
    color: var(--accent-strong);
    font-size: 0.8rem;
    font-weight: 700;
}

.meta-pill.subtle {
    color: var(--muted);
}

.viewer-summary {
    margin: 10px 0 0;
    max-width: 68ch;
}

.viewer-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.viewer-actions a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: 999px;
    background: #fffdf8;
    color: var(--text);
    text-decoration: none;
    transition: background 160ms ease, border-color 160ms ease;
}

.viewer-actions a:hover,
.viewer-actions a:focus-visible {
    background: rgba(31, 111, 96, 0.06);
    border-color: var(--border-strong);
}

.markdown-body {
    max-width: 860px;
    padding-top: 24px;
}

.document-cover {
    margin: 0 0 24px;
    overflow: hidden;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    background: #fffdf8;
}

.document-cover img {
    display: block;
    width: 100%;
    max-height: 360px;
    object-fit: cover;
}

.document-cover figcaption {
    padding: 10px 14px;
    color: var(--muted);
    font-size: 0.92rem;
}

.markdown-body h1,
.markdown-body h2,
.markdown-body h3,
.markdown-body h4 {
    margin: 1.15em 0 0.5em;
    line-height: 1.12;
    letter-spacing: -0.03em;
}

.markdown-body h1 {
    max-width: none;
    font-size: clamp(2rem, 4vw, 2.9rem);
}

.markdown-body h2 {
    font-size: clamp(1.55rem, 3vw, 2.1rem);
}

.markdown-body h3 {
    font-size: 1.28rem;
}

.markdown-body h4 {
    font-size: 1.12rem;
}

.markdown-body > :first-child {
    margin-top: 0;
}

.markdown-body p,
.markdown-body ul,
.markdown-body ol,
.markdown-body blockquote,
.markdown-body pre,
.markdown-body hr,
.markdown-body figure {
    margin: 0 0 1.05em;
}

.markdown-body ul,
.markdown-body ol {
    padding-left: 1.35em;
}

.markdown-body li + li {
    margin-top: 0.32em;
}

.markdown-body blockquote {
    padding: 16px 18px;
    border-left: 3px solid var(--accent);
    border-radius: 0 14px 14px 0;
    background: rgba(31, 111, 96, 0.08);
}

.markdown-body hr {
    border: 0;
    border-top: 1px solid var(--border);
}

.markdown-body a {
    color: var(--accent-strong);
}

.markdown-body img {
    display: block;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    background: #fffdf8;
}

.markdown-body code {
    padding: 0.1em 0.32em;
    border-radius: 6px;
    background: rgba(32, 38, 49, 0.08);
    font-family: Consolas, "Courier New", monospace;
    font-size: 0.92em;
}

.loading-state,
.empty-state,
.page-footer p,
.noscript-note {
    margin: 0;
}

.page-footer {
    margin-top: 20px;
}

.noscript-note {
    margin-top: 16px;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

@media (max-width: 1040px) {
    .topbar,
    .workspace-grid {
        grid-template-columns: 1fr;
    }

    .library-panel {
        position: static;
    }

    .viewer-panel {
        min-height: auto;
    }
}

@media (max-width: 760px) {
    .page-shell {
        width: min(calc(100% - 20px), var(--max-width));
        padding: 20px 0 32px;
    }

    .topbar,
    .library-panel,
    .viewer-panel,
    .page-footer,
    .noscript-note {
        padding: 22px;
    }

    .summary-strip {
        grid-template-columns: 1fr;
    }

    .viewer-header {
        grid-template-columns: 1fr;
    }

    .viewer-actions a {
        flex: 1 1 150px;
    }

    .doc-topline {
        flex-direction: column;
        align-items: flex-start;
    }
}