/* IR0 Journal — editorial atlas theme */

:root {
    --paper: #f4efe4;
    --paper-dark: #ebe4d6;
    --ink: #2c2825;
    --ink-muted: #5c564e;
    --rule: #c9bfb0;
    --accent: #3d5a45;
    --accent-flow: #c45c26;
    --code-bg: #eae6dc;
    --panel-bg: #faf8f3;
    --panel-active: rgba(196, 92, 38, 0.12);
    --btn-fg: #f4efe4;
    --btn-bg: #2c2825;
    --serif: "Source Serif 4", "Times New Roman", Times, serif;
    --mono: "IBM Plex Mono", "Courier New", monospace;
    --sans: "Source Sans 3", system-ui, sans-serif;
}

html.theme-dark {
    --paper: #12100e;
    --paper-dark: #1c1916;
    --ink: #f6f1e8;
    --ink-muted: #d2c8b8;
    --rule: #5a5248;
    --accent: #9cc6a4;
    --accent-flow: #f0a06a;
    --code-bg: #1f1b17;
    --panel-bg: #2e2924;
    --panel-active: rgba(240, 160, 106, 0.2);
    --btn-fg: #12100e;
    --btn-bg: #f6f1e8;
    color-scheme: dark;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

html.theme-dark body::before {
    opacity: 0.025;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    color-scheme: light;
    font-synthesis: none;
}

button,
select {
    color: var(--ink);
    background-color: var(--panel-bg);
    border: 1px solid var(--rule);
}

input,
textarea {
    color: var(--ink);
    background-color: var(--paper);
}

body {
    font-family: var(--serif);
    font-size: 18px;
    line-height: 1.65;
    color: var(--ink);
    background: var(--paper);
    min-height: 100vh;
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    opacity: 0.04;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
    z-index: 9999;
}

a {
    color: var(--accent);
    text-decoration-thickness: 1px;
    text-underline-offset: 3px;
}

a:hover {
    color: var(--accent-flow);
}

.masthead {
    border-bottom: 1px solid var(--rule);
    padding: 1.25rem 2rem;
    background: var(--panel-bg);
    position: sticky;
    top: 0;
    z-index: 100;
}

.masthead-inner {
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 0.75rem 1rem;
}

.masthead-inner > div:first-child {
    flex: 0 1 auto;
}

.masthead-inner .nav-links {
    flex: 1 1 auto;
    justify-content: flex-end;
}

.journal-title {
    font-family: var(--sans);
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    text-transform: uppercase;
}

.journal-sub {
    font-family: var(--sans);
    font-size: 0.75rem;
    color: var(--ink-muted);
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.nav-links {
    display: flex;
    flex-wrap: wrap;
    gap: 1.25rem;
    list-style: none;
    font-family: var(--mono);
    font-size: 0.8rem;
}

.nav-links a {
    color: var(--ink-muted);
    text-decoration: none;
    text-transform: lowercase;
}

.nav-links a.active,
.nav-links a:hover {
    color: var(--ink);
    text-decoration: underline;
}

.masthead-tools {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    margin-left: auto;
}

.tool-btn {
    font-family: var(--mono);
    font-size: 0.85rem;
    line-height: 1;
    width: 2rem;
    height: 2rem;
    padding: 0;
    border: 1px solid var(--rule);
    background: var(--panel-bg);
    color: var(--ink);
    cursor: pointer;
    border-radius: 2px;
}

.tool-btn:hover {
    border-color: var(--accent-flow);
    color: var(--accent-flow);
}

.tool-btn-lang {
    width: auto;
    min-width: 2rem;
    padding: 0 0.45rem;
    font-size: 0.65rem;
    letter-spacing: 0.04em;
}

@media (max-width: 700px) {
    .masthead-inner {
        flex-direction: column;
        align-items: flex-start;
    }

    .masthead-tools {
        margin-left: 0;
        order: 3;
    }

    .nav-links {
        order: 2;
    }
}

.edition-bar {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0.5rem 2rem;
    font-family: var(--mono);
    font-size: 0.7rem;
    color: var(--ink-muted);
    border-bottom: 1px solid var(--rule);
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    align-items: center;
}

.edition-bar select {
    font-family: var(--mono);
    font-size: 0.7rem;
    color: var(--ink);
    background: var(--paper);
    border: 1px solid var(--rule);
    padding: 0.15rem 0.4rem;
}

.page {
    max-width: 1100px;
    margin: 0 auto;
    padding: 2.5rem 2rem 4rem;
}

.cover-hero {
    text-align: center;
    padding: 3rem 0 2rem;
    border-bottom: 3px double var(--rule);
    margin-bottom: 2.5rem;
}

.cover-hero h1 {
    font-family: var(--sans);
    font-size: 3rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    margin-bottom: 0.5rem;
}

.cover-hero .tagline {
    font-style: italic;
    color: var(--ink-muted);
    margin-bottom: 1.5rem;
}

.cover-edition {
    font-family: var(--mono);
    font-size: 0.85rem;
    color: var(--ink-muted);
}

.two-col {
    display: grid;
    grid-template-columns: 1fr 280px;
    gap: 2.5rem;
    align-items: start;
}

@media (max-width: 800px) {
    .two-col {
        grid-template-columns: 1fr;
    }
}

.section-head {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 2rem 0 1rem;
    padding-bottom: 0.35rem;
    border-bottom: 1px solid var(--rule);
}

.story-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
    margin: 1.5rem 0;
}

.story-card {
    border: 1px solid var(--rule);
    background: var(--panel-bg);
    padding: 1.25rem;
    transition: border-color 0.15s;
}

.story-card:hover {
    border-color: var(--accent);
}

.story-card h3 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.story-card p {
    font-size: 0.95rem;
    color: var(--ink-muted);
    margin-bottom: 0.75rem;
}

.story-card code {
    font-family: var(--mono);
    font-size: 0.8rem;
    background: var(--code-bg);
    padding: 0.15rem 0.35rem;
}

.story-card a.btn {
    font-family: var(--mono);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

aside.marginalia {
    font-size: 0.85rem;
    color: var(--ink-muted);
    border-left: 2px solid var(--rule);
    padding-left: 1rem;
}

aside.marginalia h4 {
    font-family: var(--mono);
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 0.5rem;
    color: var(--ink);
}

.story-header {
    margin-bottom: 2rem;
}

.story-header h1 {
    font-size: 2rem;
    margin-bottom: 0.35rem;
}

.story-header .cmd,
.cmd {
    font-family: var(--mono);
    font-size: 0.95rem;
    color: var(--ink);
    background: var(--code-bg);
    padding: 0.75rem 1rem;
    border-left: 3px solid var(--accent);
    margin: 1rem 0;
}

.timeline {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem;
    margin: 1.5rem 0;
    font-family: var(--mono);
    font-size: 0.65rem;
    align-items: center;
}

.timeline .step-node {
    padding: 0.25rem 0.5rem;
    border: 1px solid var(--rule);
    background: var(--panel-bg);
    color: var(--ink-muted);
    transition: all 0.2s;
}

.timeline .step-node {
    max-width: 8rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.timeline .step-node.active {
    background: var(--accent-flow);
    color: var(--btn-fg);
    border-color: var(--accent-flow);
}

.timeline .arrow {
    color: var(--rule);
}

.player-controls {
    display: flex;
    gap: 0.75rem;
    align-items: center;
    margin: 1rem 0 1.5rem;
    font-family: var(--mono);
    font-size: 0.8rem;
}

.player-controls button {
    font-family: var(--mono);
    font-size: 0.75rem;
    padding: 0.4rem 0.9rem;
    background: var(--btn-bg);
    color: var(--btn-fg);
    border: none;
    cursor: pointer;
}

.player-controls button:hover {
    background: var(--accent);
    color: var(--btn-fg);
}

.player-controls button.secondary {
    background: var(--panel-bg);
    color: var(--ink);
    border: 1px solid var(--rule);
}

.player-controls input[type="range"] {
    flex: 1;
    max-width: 280px;
}

.panel-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
    margin-bottom: 2rem;
}

@media (max-width: 700px) {
    .panel-grid {
        grid-template-columns: 1fr;
    }
}

.panel {
    border: 1px solid var(--rule);
    background: var(--panel-bg);
    min-height: 160px;
}

.panel-head {
    font-family: var(--mono);
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    padding: 0.5rem 0.75rem;
    border-bottom: 1px solid var(--rule);
    background: var(--paper-dark);
}

.panel-body {
    padding: 0.75rem;
    font-family: var(--mono);
    font-size: 0.8rem;
    line-height: 1.5;
    white-space: pre-wrap;
}

.panel-body.concept {
    font-family: var(--serif);
    font-size: 0.95rem;
}

.panel.active-panel {
    border-color: var(--accent-flow);
    box-shadow: 0 0 0 1px var(--accent-flow);
}

.step-detail {
    border: 1px solid var(--rule);
    padding: 1.25rem;
    background: var(--panel-bg);
    margin-bottom: 2rem;
}

.step-detail dl {
    display: grid;
    grid-template-columns: 120px 1fr;
    gap: 0.35rem 1rem;
    font-size: 0.9rem;
}

.step-detail dt {
    font-family: var(--mono);
    font-size: 0.75rem;
    color: var(--ink-muted);
}

.step-detail dd code {
    font-family: var(--mono);
    font-size: 0.8rem;
}

.compare-box {
    border: 1px solid var(--rule);
    padding: 1rem;
    margin-top: 2rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.compare-box h4 {
    font-family: var(--mono);
    font-size: 0.75rem;
    margin-bottom: 0.5rem;
    grid-column: 1 / -1;
}

@media (max-width: 600px) {
    .compare-box {
        grid-template-columns: 1fr;
    }
}

.atlas-wrap {
    border: 1px solid var(--rule);
    background: var(--panel-bg);
    overflow: auto;
    min-height: 320px;
    max-height: 70vh;
}

.atlas-catalog {
    padding: 0.75rem;
}

.atlas-layer-band {
    border: 1px solid var(--rule);
    margin-bottom: 0.75rem;
    background: var(--paper);
    border-left-width: 5px;
}

.atlas-layer-band[data-layer="userspace"] { border-left-color: var(--accent-flow); }
.atlas-layer-band[data-layer="boundary"] { border-left-color: var(--accent); }
.atlas-layer-band[data-layer="kernel"] { border-left-color: var(--ink); }
.atlas-layer-band[data-layer="arch"] { border-left-color: var(--ink-muted); }
.atlas-layer-band[data-layer="hardware"] { border-left-color: var(--rule); }

.atlas-layer-head {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.5rem 0.75rem;
    border-bottom: 1px solid var(--rule);
    background: var(--paper-dark);
}

.atlas-layer-head h3 {
    font-family: var(--mono);
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin: 0;
}

.atlas-layer-count {
    font-family: var(--mono);
    font-size: 0.65rem;
    color: var(--ink-muted);
}

.atlas-node-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(210px, 1fr));
    gap: 0.5rem;
    padding: 0.75rem;
}

.atlas-node-card {
    text-align: left;
    border: 1px solid var(--rule);
    background: var(--panel-bg);
    color: var(--ink);
    padding: 0.55rem 0.65rem;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    min-width: 0;
    min-height: 4.25rem;
    overflow: hidden;
}

.atlas-node-card:hover {
    border-color: var(--accent-flow);
}

.atlas-node-card.active {
    border-color: var(--accent-flow);
    box-shadow: 0 0 0 1px var(--accent-flow);
    background: var(--panel-active);
}

.atlas-node-label {
    font-size: 0.85rem;
    font-weight: 600;
    line-height: 1.3;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.atlas-node-id {
    font-family: var(--mono);
    font-size: 0.6rem;
    color: var(--ink-muted);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    margin-top: auto;
}

.atlas-relations {
    font-size: 0.85rem;
    padding: 0.5rem 0;
    border-top: 1px dashed var(--rule);
    margin-top: 0.5rem;
}

.atlas-path-strip {
    display: flex;
    flex-wrap: nowrap;
    align-items: center;
    gap: 0.35rem;
    padding: 0.75rem;
    font-family: var(--mono);
    font-size: 0.72rem;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
}

.atlas-path-node {
    border: 1px solid var(--rule);
    background: var(--panel-bg);
    color: var(--ink);
    padding: 0.35rem 0.55rem;
    cursor: pointer;
    flex-shrink: 0;
    max-width: 11rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.atlas-path-node.active {
    border-color: var(--accent-flow);
    background: var(--panel-active);
    font-weight: 600;
}

.atlas-path-arrow {
    color: var(--ink-muted);
}

.atlas-path-empty {
    padding: 1rem;
    font-size: 0.85rem;
    color: var(--ink-muted);
}

.layer-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
    font-family: var(--mono);
    font-size: 0.75rem;
}

.layer-tabs button {
    padding: 0.35rem 0.75rem;
    border: 1px solid var(--rule);
    background: var(--panel-bg);
    color: var(--ink);
    cursor: pointer;
}

.layer-tabs button.active {
    background: var(--ink);
    color: var(--paper);
    border-color: var(--ink);
}

.atlas-sidebar {
    margin-top: 1rem;
    padding: 1rem;
    border: 1px solid var(--rule);
    background: var(--panel-bg);
    font-size: 0.9rem;
}

.atlas-sidebar h3 {
    font-size: 1rem;
    margin-bottom: 0.5rem;
}

.lab-list {
    list-style: none;
    font-family: var(--mono);
    font-size: 0.85rem;
}

.lab-list li {
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--rule);
    cursor: pointer;
}

.lab-list li:hover {
    color: var(--accent);
}

.article-body h1 { font-size: 1.75rem; margin: 1.5rem 0 0.75rem; }
.article-body h2 { font-size: 1.25rem; margin: 1.25rem 0 0.5rem; }
.article-body p { margin-bottom: 1rem; }
.article-body table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
    margin: 1rem 0;
}
.article-body th, .article-body td {
    border: 1px solid var(--rule);
    padding: 0.5rem;
    text-align: left;
}
.article-body code {
    font-family: var(--mono);
    font-size: 0.85em;
    background: var(--code-bg);
    padding: 0.1rem 0.3rem;
}

.footer-note {
    margin-top: 3rem;
    padding-top: 1rem;
    border-top: 1px solid var(--rule);
    font-family: var(--mono);
    font-size: 0.7rem;
    color: var(--ink-muted);
    text-align: center;
}

html.theme-dark .highlight-line {
    background: rgba(224, 122, 66, 0.2);
}

html.theme-dark .layer-tabs button.active,
html.theme-dark .view-toggle button.active {
    background: var(--accent-flow);
    color: var(--btn-fg);
    border-color: var(--accent-flow);
}

.highlight-line {
    background: rgba(196, 92, 38, 0.15);
    display: block;
    margin: 0 -0.75rem;
    padding: 0 0.75rem;
}

.code-marker {
    color: var(--accent-flow);
    font-size: 0.75em;
}

.term-cursor {
    animation: term-blink 1s step-end infinite;
    color: var(--accent-flow);
}

@keyframes term-blink {
    50% { opacity: 0; }
}

.kernel-highlight {
    color: var(--accent-flow);
    font-weight: 500;
}

.kernel-dim {
    color: var(--ink-muted);
    font-style: italic;
}

.panel-dim {
    opacity: 0.72;
}

.panel-dim.active-panel {
    opacity: 1;
}

.panel-hidden {
    opacity: 0.35;
}

.panel.active-panel {
    border-color: var(--accent-flow);
    box-shadow: 0 0 0 1px rgba(196, 92, 38, 0.35);
}

.panel-body {
    min-height: 140px;
    max-height: 220px;
    overflow-y: auto;
}

.atlas-mini-wrap {
    border: 1px solid var(--rule);
    margin: 1.5rem 0;
    min-height: 200px;
}

.trace-evidence {
    font-family: var(--mono);
    font-size: 0.75rem;
    color: var(--ink-muted);
    padding: 0.5rem 0;
}

.normative-banner {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0.65rem 2rem;
    font-family: var(--sans);
    font-size: 0.82rem;
    background: var(--paper-dark);
    border-bottom: 1px solid var(--rule);
    color: var(--ink-muted);
}

.normative-banner strong {
    color: var(--ink);
}

.mission-lede {
    font-size: 1.05rem;
    max-width: 42rem;
    margin: 0 auto 2rem;
    text-align: center;
    color: var(--ink-muted);
}

.intro-block {
    max-width: 40rem;
    margin: 0 auto 2.5rem;
}

.intro-block p {
    margin-bottom: 0.85rem;
}

.cover-logo {
    display: block;
    width: 160px;
    height: 160px;
    margin: 0 auto 1.25rem;
    object-fit: contain;
}

html.theme-dark .cover-logo {
    mix-blend-mode: screen;
}

.action-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.action-card {
    border: 1px solid var(--rule);
    background: var(--panel-bg);
    padding: 1.1rem 1.2rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.action-card h3 {
    font-size: 1.05rem;
    margin: 0;
}

.action-card h3 a {
    color: inherit;
    text-decoration: none;
}

.action-card h3 a:hover {
    color: var(--accent-flow);
}

.action-card p {
    font-size: 0.88rem;
    color: var(--ink-muted);
    flex: 1;
}

.action-card a.btn {
    font-family: var(--mono);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--accent-flow);
    text-decoration: none;
}

.meta-links {
    list-style: none;
    line-height: 2;
    font-family: var(--mono);
    font-size: 0.85rem;
}

.section-note {
    font-size: 0.92rem;
    color: var(--ink-muted);
    margin-bottom: 1rem;
}

.journey-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 2rem;
    align-items: start;
}

@media (max-width: 800px) {
    .journey-layout {
        grid-template-columns: 1fr;
    }
}

.journey-flow {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0.25rem;
}

.flow-node {
    font-family: var(--mono);
    font-size: 0.78rem;
    text-align: left;
    padding: 0.55rem 0.75rem;
    border: 1px solid var(--rule);
    background: var(--panel-bg);
    color: var(--ink);
    cursor: pointer;
    transition: border-color 0.15s, background 0.15s;
}

.flow-node.active {
    border-color: var(--accent-flow);
    background: var(--panel-active);
}

.flow-node .flow-label {
    display: block;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.flow-arrow {
    text-align: center;
    color: var(--rule);
    font-size: 0.75rem;
    line-height: 1;
}

.detail-kicker {
    font-family: var(--mono);
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--ink-muted);
    margin: 1rem 0 0.35rem;
}

.see-box {
    font-family: var(--mono);
    font-size: 0.82rem;
    background: var(--code-bg);
    padding: 0.75rem 1rem;
    border-left: 3px solid var(--accent);
    white-space: pre-wrap;
    margin-bottom: 0.5rem;
}

.journey-links {
    font-family: var(--mono);
    font-size: 0.78rem;
    margin-top: 1rem;
}

.view-toggle {
    display: flex;
    gap: 0.5rem;
    margin: 1rem 0;
}

.view-toggle button {
    font-family: var(--mono);
    font-size: 0.72rem;
    padding: 0.35rem 0.75rem;
    border: 1px solid var(--rule);
    background: var(--panel-bg);
    color: var(--ink);
    cursor: pointer;
}

.view-toggle button.active {
    background: var(--ink);
    color: var(--paper);
    border-color: var(--ink);
}

.dual-panel {
    font-family: var(--mono);
    font-size: 0.8rem;
    background: var(--code-bg);
    padding: 1rem;
    border: 1px solid var(--rule);
    white-space: pre-wrap;
    margin-bottom: 1.5rem;
}

.timeline-track {
    max-width: 640px;
    margin: 2rem auto;
}

.timeline-milestone {
    border: 1px solid var(--rule);
    background: var(--panel-bg);
    padding: 1.25rem;
}

.timeline-milestone h3 {
    font-size: 1.15rem;
    margin-bottom: 0.75rem;
}

.timeline-milestone img {
    width: 100%;
    border: 1px solid var(--rule);
    margin-bottom: 0.75rem;
}

.timeline-placeholder {
    font-family: var(--mono);
    font-size: 0.75rem;
    color: var(--ink-muted);
    border: 1px dashed var(--rule);
    padding: 1rem;
    margin-bottom: 0.75rem;
    font-style: italic;
}

.timeline-connector {
    text-align: center;
    color: var(--accent);
    font-size: 1.25rem;
    padding: 0.35rem 0;
}

.milestone-req {
    margin-top: 0.75rem;
    margin-left: 1.25rem;
    font-size: 0.85rem;
    color: var(--ink-muted);
}

.break-screenshot {
    max-width: 100%;
    border: 1px solid var(--rule);
    margin: 1rem 0;
}

.break-compare {
    margin-top: 1rem;
}

.lab-list li.active {
    color: var(--accent-flow);
    font-weight: bold;
}

.arch-hero {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.arch-stack {
    display: flex;
    flex-direction: column;
    gap: 0;
    margin-bottom: 2rem;
    max-width: 52rem;
}

.arch-stack-band {
    border: 1px solid var(--rule);
    background: var(--panel-bg);
    border-left-width: 5px;
}

.arch-stack-band[data-layer="userspace"] { border-left-color: var(--accent-flow); }
.arch-stack-band[data-layer="isd"] { border-left-color: var(--accent); }
.arch-stack-band[data-layer="ir0-kernel"] { border-left-color: var(--ink); }
.arch-stack-band[data-layer="hardware"] { border-left-color: var(--rule); }

.arch-layer-role {
    margin: 0.25rem 0 0;
    font-family: var(--sans);
    font-size: 0.82rem;
    color: var(--ink-muted);
    text-transform: none;
    letter-spacing: 0;
}

.arch-stack-head {
    padding: 0.55rem 0.85rem;
    border-bottom: 1px solid var(--rule);
    background: var(--paper-dark);
}

.arch-stack-head h3 {
    font-family: var(--mono);
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin: 0;
}

.arch-stack-items {
    display: flex;
    flex-wrap: wrap;
    gap: 0.45rem;
    padding: 0.85rem;
}

.arch-chip {
    font-family: var(--mono);
    font-size: 0.72rem;
    border: 1px solid var(--rule);
    background: var(--paper);
    padding: 0.25rem 0.5rem;
}

.arch-stack-arrow,
.contract-connector {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.15rem;
    padding: 0.35rem 0;
    font-family: var(--mono);
    font-size: 0.62rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--ink-muted);
    background: var(--paper);
    border-left: 1px solid var(--rule);
    border-right: 1px solid var(--rule);
}

.arch-arrow-glyph {
    font-size: 1rem;
    line-height: 1;
    color: var(--accent-flow);
}

.contracts-flow {
    display: flex;
    flex-direction: column;
    gap: 0;
    max-width: 52rem;
    margin-bottom: 1rem;
}

.contract-step {
    border: 1px solid var(--rule);
    background: var(--panel-bg);
    padding: 1rem 1.1rem;
}

.contract-step h3 {
    font-size: 1rem;
    margin-bottom: 0.35rem;
}

.contract-detail {
    font-size: 0.88rem;
    color: var(--ink-muted);
    margin-bottom: 0.5rem;
}

.contract-items {
    margin-left: 1.1rem;
    font-size: 0.9rem;
}

.arch-contract-role {
    font-family: var(--mono);
    font-size: 0.72rem;
    color: var(--ink-muted);
}

.article-body blockquote {
    border-left: 3px solid var(--accent);
    padding-left: 1rem;
    margin: 1rem 0;
    color: var(--ink-muted);
    font-style: italic;
}

.break-themes {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin: 1rem 0 2rem;
}

.break-theme {
    font-family: var(--sans);
    font-size: 0.95rem;
    padding: 0.55rem 0.9rem;
    border: 1px solid var(--rule);
    background: var(--panel-bg);
    color: var(--ink);
    cursor: pointer;
}

.break-theme.active {
    border-color: var(--accent-flow);
    background: var(--panel-active);
    color: var(--ink);
}

.break-stage {
    max-width: 40rem;
}

.break-sequence {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    margin: 1rem 0;
}

.break-step {
    text-align: left;
    font-family: var(--sans);
    font-size: 0.95rem;
    padding: 0.7rem 0.9rem;
    border: 1px solid var(--rule);
    background: var(--panel-bg);
    color: var(--ink);
    cursor: pointer;
}

.break-step.active {
    border-color: var(--accent-flow);
    background: var(--panel-active);
}

.break-step-kicker {
    display: block;
    font-family: var(--mono);
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--ink-muted);
    margin-bottom: 0.2rem;
}

.break-step-detail {
    border: 1px solid var(--rule);
    background: var(--panel-bg);
    color: var(--ink);
    padding: 1.1rem 1.2rem;
    margin-top: 1rem;
}

.misc-section {
    scroll-margin-top: 6rem;
    margin-bottom: 2.5rem;
}

.misc-chip {
    font-family: var(--sans);
    font-size: 0.95rem;
    padding: 0.55rem 0.9rem;
    border: 1px solid var(--rule);
    background: var(--panel-bg);
    color: var(--ink);
    cursor: pointer;
}

a.misc-chip {
    text-decoration: none;
    display: inline-block;
}

.journey-replay {
    margin: 1rem 0 0.35rem;
}

.journey-replay .btn {
    display: inline-block;
    font-family: var(--mono);
    font-size: 0.8rem;
    text-decoration: none;
    background: var(--btn-bg);
    color: var(--btn-fg);
    padding: 0.4rem 0.85rem;
    border: 1px solid var(--btn-bg);
}

.journey-maps {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1.25rem;
    font-size: 0.9rem;
    margin-top: 0.4rem;
}

.journey-diagram {
    margin-top: 1.25rem;
    border: 1px solid var(--rule);
    background: var(--panel-bg);
    padding: 1rem 1.1rem;
}

.fork-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    min-height: 4.2rem;
}

.fork-proc {
    font-family: var(--mono);
    font-size: 0.85rem;
    border: 1px solid var(--rule);
    padding: 0.7rem 1.1rem;
    min-width: 5.5rem;
    text-align: center;
}

.fork-arrow {
    font-family: var(--mono);
    font-size: 0.7rem;
    color: var(--ink-muted);
}

.fork-caption {
    text-align: center;
    font-size: 0.85rem;
    color: var(--ink-muted);
    margin: 0.6rem 0 0;
}

.journey-diagram[data-phase="parent"] .fork-child,
.journey-diagram[data-phase="parent"] .fork-arrow {
    opacity: 0.22;
}

.journey-diagram[data-phase="split"] .fork-parent,
.journey-diagram[data-phase="split"] .fork-child {
    border-color: var(--accent-flow);
}

.journey-diagram[data-phase="exec"] .fork-child {
    border-color: var(--accent-flow);
}

.journey-diagram[data-phase="exec"] .fork-parent {
    opacity: 0.45;
}

.journey-diagram[data-phase="wait"] .fork-parent {
    border-color: var(--accent-flow);
}

.journey-diagram[data-phase="wait"] .fork-child {
    opacity: 0.35;
    text-decoration: line-through;
}

.misc-journal-list {
    list-style: none;
    line-height: 1.9;
}

.break-hook {
    border: 1px solid var(--rule);
    background: var(--panel-bg);
    padding: 1.1rem 1.2rem;
    margin: 1rem 0;
}

.break-hook-prompt {
    font-family: var(--sans);
    margin-bottom: 0.85rem;
}

.break-choices {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.break-choice {
    text-align: left;
    font-family: var(--sans);
    font-size: 0.95rem;
    padding: 0.65rem 0.85rem;
    color: var(--ink);
    background: var(--paper);
}

.break-choice:disabled {
    opacity: 0.55;
}

.break-step.is-locked {
    opacity: 0.45;
    cursor: default;
}