/* === Subtexture — public stack page ===
   Shares the house type and palette from style.css. Everything specific to
   this section is namespaced under .subtexture / .st-* so the section can be
   lifted onto its own domain without untangling it from git-lex.com. */

.subtexture {
    --ink: #000;
    --ink-soft: #555;
    --ink-faint: #999;
    --rule: #ddd;
    --rule-strong: #000;
    --paper: #fff;
    --wash: rgba(0, 0, 0, 0.025);
}

.st-page {
    position: relative;
    z-index: 1;
    max-width: 940px;
    margin: 0 auto;
    padding: 5rem 2rem 6rem;
}

/* --- Masthead --- */

.st-masthead {
    text-align: center;
    margin-bottom: 5rem;
}

.st-masthead h1 {
    font-size: 4.5rem;
    font-weight: normal;
    letter-spacing: 0.16em;
    border-bottom: none;
    margin: 0 0 0.75rem;
    padding: 0;
    line-height: 1.1;
}

.st-tagline {
    font-size: 0.8rem;
    letter-spacing: 0.32em;
    text-transform: uppercase;
    color: var(--ink-faint);
    margin-bottom: 2.5rem;
}

.st-lede {
    max-width: 640px;
    margin: 0 auto;
    font-size: 1.15rem;
    line-height: 1.85;
    color: #333;
}

.st-lede + .st-lede {
    margin-top: 1.25rem;
}

.st-lede strong {
    color: var(--ink);
}

.st-define {
    display: block;
    max-width: 640px;
    margin: 2.5rem auto 0;
    padding: 1.25rem 1.5rem;
    border-left: 2px solid var(--rule-strong);
    text-align: left;
    font-size: 0.95rem;
    line-height: 1.75;
    color: var(--ink-soft);
    background: rgba(255, 255, 255, 0.75);
}

.st-define b {
    color: var(--ink);
    font-weight: normal;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    font-size: 0.8rem;
    display: block;
    margin-bottom: 0.35rem;
}

/* --- Section headings --- */

.st-rule {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin: 5rem 0 2rem;
}

.st-rule h2 {
    font-size: 0.8rem;
    font-weight: normal;
    text-transform: uppercase;
    letter-spacing: 0.24em;
    color: var(--ink-soft);
    margin: 0;
    white-space: nowrap;
}

.st-rule::after {
    content: "";
    flex: 1;
    height: 1px;
    background: var(--rule);
}

/* --- The diagram --- */

.st-diagram {
    background: rgba(255, 255, 255, 0.82);
    border: 1px solid var(--rule);
    padding: 1.5rem 1rem;
}

.st-diagram svg {
    display: block;
    width: 100%;
    height: auto;
}

.st-node rect {
    fill: #fff;
    stroke: var(--rule-strong);
    stroke-width: 1;
}

.st-node .st-node-name {
    font-family: 'American Typewriter', 'Courier New', monospace;
    font-size: 16px;
    fill: var(--ink);
}

.st-node .st-node-role {
    font-family: 'Courier New', monospace;
    font-size: 10.5px;
    letter-spacing: 0.06em;
    fill: var(--ink-soft);
}

.st-node.is-loose rect {
    stroke: var(--ink);
    stroke-dasharray: 4 3;
    fill: none;
}

.st-node.is-faint rect {
    stroke: var(--ink-faint);
}

.st-node.is-faint .st-node-name,
.st-node.is-faint .st-node-role {
    fill: var(--ink-faint);
}

.st-edge {
    fill: none;
    stroke: #aaa;
    stroke-width: 1;
}

.st-arrow {
    fill: #aaa;
}

/* Focus: dim everything that is not the hovered component or its links.
   The interaction answers one question — what talks to what — and is the
   only motion on the page. */

.st-node,
.st-edge,
.st-arrow {
    transition: opacity 0.18s ease, stroke 0.18s ease, fill 0.18s ease;
}

.st-diagram[data-focus] .st-node,
.st-diagram[data-focus] .st-edge,
.st-diagram[data-focus] .st-arrow {
    opacity: 0.15;
}

.st-diagram[data-focus] .st-node.is-lit,
.st-diagram[data-focus] .st-edge.is-lit,
.st-diagram[data-focus] .st-arrow.is-lit {
    opacity: 1;
}

.st-diagram[data-focus] .st-edge.is-lit {
    stroke: var(--ink);
    stroke-width: 1.5;
}

.st-diagram[data-focus] .st-arrow.is-lit {
    fill: var(--ink);
}

.st-node {
    cursor: pointer;
}

.st-diagram-note {
    margin: 1.25rem 0 0.25rem;
    font-size: 0.78rem;
    letter-spacing: 0.04em;
    color: var(--ink-faint);
    text-align: center;
}

.st-diagram-key {
    display: block;
    margin-top: 0.3rem;
    font-family: 'Courier New', monospace;
    font-size: 0.7rem;
    letter-spacing: 0.06em;
}

.st-edge.is-loose {
    stroke-dasharray: 4 3;
}

/* --- Component cards --- */

.st-layer {
    margin-bottom: 3rem;
}

.st-layer-lead {
    font-size: 0.95rem;
    color: var(--ink-soft);
    margin: 0 0 1.75rem;
}

.st-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.st-card {
    border: 1px solid var(--rule);
    background: rgba(255, 255, 255, 0.85);
    padding: 1.5rem;
    transition: border-color 0.2s, background 0.2s;
}

.st-card:hover,
.st-card.is-lit {
    border-color: var(--ink-soft);
    background: rgba(255, 255, 255, 0.97);
}

.st-card-wide {
    grid-column: 1 / -1;
}

.st-card-head {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 0.35rem;
}

.st-card h4 {
    font-size: 1.35rem;
    font-weight: normal;
    margin: 0;
    letter-spacing: 0.02em;
}

.st-status {
    font-family: 'Courier New', monospace;
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.16em;
    color: var(--ink-soft);
    border: 1px solid var(--rule);
    padding: 0.15rem 0.5rem;
    white-space: nowrap;
}

.st-status[data-state="running"] {
    color: var(--ink);
    border-color: var(--ink);
}

.st-role {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.16em;
    color: var(--ink-faint);
    margin: 0 0 1rem;
}

.st-card p {
    font-size: 0.95rem;
    line-height: 1.7;
    color: #444;
    margin: 0 0 0.9rem;
}

.st-card p:last-child {
    margin-bottom: 0;
}

.st-card .st-aside {
    font-size: 0.85rem;
    color: var(--ink-soft);
    border-top: 1px solid var(--rule);
    padding-top: 0.8rem;
    margin-top: 1.1rem;
}

.st-card .st-aside b {
    font-weight: normal;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    font-size: 0.7rem;
    color: var(--ink-faint);
    display: block;
    margin-bottom: 0.3rem;
}

/* --- Closing panels --- */

.st-panels {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 2.5rem;
}

.st-panel h3 {
    font-size: 0.8rem;
    font-weight: normal;
    text-transform: uppercase;
    letter-spacing: 0.18em;
    color: var(--ink-soft);
    margin: 0 0 0.9rem;
}

.st-panel p {
    font-size: 0.95rem;
    line-height: 1.7;
    color: #444;
    margin: 0 0 0.9rem;
}

.st-footer {
    margin-top: 5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--rule);
    text-align: center;
    font-size: 0.85rem;
    color: var(--ink-faint);
}

.st-footer a {
    color: var(--ink-soft);
}

/* --- Responsive --- */

@media (max-width: 768px) {
    .st-page { padding: 3rem 1.25rem 4rem; }
    .st-masthead h1 { font-size: 2.6rem; letter-spacing: 0.1em; }
    .st-tagline { letter-spacing: 0.2em; font-size: 0.7rem; }
    .st-lede { font-size: 1rem; }
    .st-cards { grid-template-columns: 1fr; }
    .st-diagram { padding: 1rem 0.5rem; overflow-x: auto; }
    /* Below this width the diagram would shrink to illegible. Hold it at a
       readable size and let the frame scroll instead. */
    .st-diagram svg { min-width: 620px; }
    .st-diagram-note { text-align: left; padding: 0 0.5rem; }
}