/* =============================================================================
   Foldnine — section composition
   ========================================================================== */

.visually-hidden {
  position: absolute; inline-size: 1px; block-size: 1px;
  margin: -1px; padding: 0; overflow: hidden;
  clip-path: inset(50%); white-space: nowrap; border: 0;
}

code {
  font-family: var(--mono); font-size: .88em;
  color: var(--ink); background: var(--surface-2);
  padding: .1em .35em; border-radius: 3px;
}

/* --- shared -------------------------------------------------------------- */

.section-head { max-width: 46rem; margin-block-end: clamp(2.5rem, 6vw, 4.5rem); }
.section-head .label { margin-block-end: 1.25rem; }
.section-head .display { margin-block-end: 1.5rem; }
.section-lede { color: var(--prose); }

.chip {
  display: inline-flex; align-items: center; gap: .4rem;
  font-family: var(--mono); font-size: var(--step--2);
  letter-spacing: .1em; text-transform: uppercase;
  padding: .28rem .6rem; border-radius: 999px;
  border: 1px solid var(--rule-firm); color: var(--muted);
  white-space: nowrap; margin: 0;
}
.chip-live    { color: var(--accent); border-color: var(--rule-accent); background: var(--accent-wash); }
.chip-spec    { color: var(--pending); border-color: #4a3c1d; background: var(--pending-wash); }
.chip-gate    { color: var(--ink); border-color: var(--rule-firm); }
.chip-hot     { color: var(--accent); border-color: var(--rule-accent); background: var(--accent-wash); }
.chip-pending { color: var(--pending); border-color: #4a3c1d; background: var(--pending-wash); }
.chip-demo    { color: var(--muted); }

.card {
  background: var(--surface-1);
  border: 1px solid var(--rule);
  border-radius: 6px;
  padding: clamp(1.25rem, 2.6vw, 1.75rem);
}

.kv { display: grid; gap: .6rem; }
.kv li { display: flex; justify-content: space-between; gap: 1rem; align-items: baseline;
         border-block-end: 1px solid var(--rule); padding-block-end: .6rem; }
.kv li:last-child { border-block-end: 0; padding-block-end: 0; }
.kv li > span:first-child { color: var(--muted); font-size: var(--step--1); }
.kv li > span:last-child  { color: var(--ink); font-size: var(--step--1); text-align: end; }
.kv-wide li { font-size: var(--step--1); }

/* --- masthead ------------------------------------------------------------ */

.masthead {
  position: sticky; inset-block-start: 0; z-index: 50;
  border-block-end: 1px solid transparent;
  transition: background var(--t-move) var(--ease), border-color var(--t-move) var(--ease);
}
.masthead.is-stuck {
  background: color-mix(in oklab, var(--bg) 82%, transparent);
  backdrop-filter: blur(12px);
  border-block-end-color: var(--rule);
}
.masthead-inner { display: flex; align-items: center; gap: 1.5rem; padding-block: 1rem; }
.wordmark {
  display: inline-flex; align-items: center; gap: .6rem;
  font-size: 1.125rem; letter-spacing: -.01em; color: var(--ink);
  text-decoration: none; flex: none;
}
.wordmark .mark { inline-size: 1.35rem; block-size: 1.35rem; color: var(--ink); }
.masthead-nav { display: flex; gap: 1.5rem; margin-inline-start: auto; }
.masthead-nav a {
  font-family: var(--mono); font-size: var(--step--1);
  letter-spacing: .06em; color: var(--muted); text-decoration: none;
  /* 24px minimum target, WCAG 2.2 2.5.8. The text is 19px; the padding is what
     makes it hittable rather than merely readable. */
  display: inline-flex; align-items: center; min-block-size: 1.5rem;
  padding-block: .15rem;
}
.masthead-nav a:hover { color: var(--accent); }
.btn-sm { padding: .6rem 1rem; }
@media (max-width: 62rem) { .masthead-nav { display: none; } .btn-sm { margin-inline-start: auto; } }

/* --- hero ---------------------------------------------------------------- */

.hero {
  position: relative; border-block-start: 0;
  min-block-size: min(92svh, 60rem);
  display: flex; align-items: center;
  padding-block: clamp(3rem, 9vh, 7rem);
  overflow: hidden;
}
.hero-field { position: absolute; inset: 0; display: block; }
.hero-field canvas { display: block; inline-size: 100%; block-size: 100%; }
.hero-veil {
  position: absolute; inset: 0;
  background:
    radial-gradient(120% 90% at 18% 42%, color-mix(in oklab, var(--bg) 88%, transparent) 0%, transparent 62%),
    linear-gradient(to bottom, transparent 55%, var(--bg) 100%);
}
.hero-inner {
  position: relative;
  display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
  gap: clamp(2rem, 5vw, 4.5rem); align-items: center; inline-size: 100%;
}
.hero-eyebrow { display: flex; align-items: center; gap: .6rem; margin-block-end: 1.75rem; }
.hero-title {
  font-size: var(--step-5); line-height: .98; letter-spacing: var(--track-hero);
  margin-block-end: 1.75rem;
}
.hero-title em { font-style: italic; color: var(--accent); }
.hero-lede { margin-block-end: 2.25rem; }
.hero-actions { display: flex; flex-wrap: wrap; gap: .75rem; }

/* --- hero panel ---------------------------------------------------------- */

.panel {
  background: color-mix(in oklab, var(--surface-1) 88%, transparent);
  backdrop-filter: blur(10px);
  border: 1px solid var(--rule-firm); border-radius: 8px;
  padding: 1.25rem;
}
.panel-head { display: flex; align-items: center; justify-content: space-between; gap: 1rem;
              padding-block-end: .9rem; border-block-end: 1px solid var(--rule); }
.panel-rows { display: grid; gap: .1rem; padding-block: .5rem; }
.panel-row {
  display: grid; grid-template-columns: 4.2rem 1fr auto 4rem;
  gap: .75rem; align-items: baseline;
  padding-block: .62rem; border-block-end: 1px solid var(--rule);
  font-size: var(--step--1);
}
.panel-row:last-child { border-block-end: 0; }
.panel-id    { color: var(--muted); font-size: var(--step--2); }
.panel-name  { color: var(--prose); }
.panel-count { color: var(--ink); text-align: end; font-variant-numeric: tabular-nums; }
.panel-state { font-family: var(--mono); font-size: var(--step--2);
               text-transform: uppercase; letter-spacing: .08em; text-align: end; }
.panel-state.is-live { color: var(--accent); }
.panel-state.is-spec { color: var(--pending); }
.panel-row.is-spec .panel-name, .panel-row.is-spec .panel-count { color: var(--muted); }
.panel-foot { display: flex; align-items: center; gap: .55rem; flex-wrap: wrap;
              padding-block-start: .9rem; border-block-start: 1px solid var(--rule);
              text-transform: uppercase; letter-spacing: .1em; }
.panel-foot-note { margin-inline-start: auto; color: var(--muted); text-transform: none; letter-spacing: .04em; }

@media (max-width: 58rem) {
  .hero { min-block-size: auto; }
  .hero-inner { grid-template-columns: 1fr; gap: 2.5rem; }
  .hero-title { font-size: clamp(2.75rem, 13vw, 4.5rem); }
  /* Two lines instead of three: the workflow id, its state and the count sit on
     one row, the stage name takes the next. Dropping the state on a phone would
     have removed the one thing the panel is honest about. */
  .panel-row {
    grid-template-columns: auto auto 1fr;
    gap: .2rem .7rem;
    padding-block: .8rem;
  }
  .panel-id    { grid-area: 1 / 1; }
  .panel-state { grid-area: 1 / 2; text-align: start; }
  .panel-count { grid-area: 1 / 3; }
  .panel-name  { grid-area: 2 / 1 / 2 / -1; }
}

/* --- premise ------------------------------------------------------------- */

.premise-title { margin-block-end: 2.5rem; }
.premise-title br { display: block; }
.premise-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(17rem, 1fr));
                gap: clamp(1.5rem, 4vw, 3rem); }
.premise-lead { font-size: var(--step-1); line-height: 1.45; color: var(--ink); }
.premise-note { color: var(--muted); }

/* --- pipeline ------------------------------------------------------------ */

.stages { display: grid; gap: 0; }
.stage {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 20rem);
  /* auto/1fr, not auto/auto: the metadata spans both rows, and without a fixed
     first row the browser hands it part of row 1, which pushes the prose away
     from its own heading. */
  grid-template-rows: auto 1fr;
  gap: .9rem clamp(1.25rem, 4vw, 3.5rem);
  align-items: start;
  padding: clamp(1.75rem, 3.5vw, 2.5rem) 0 clamp(1.75rem, 3.5vw, 2.5rem) clamp(1.25rem, 3vw, 2.5rem);
  border-block-start: 1px solid var(--rule);
}
.stage:last-child { border-block-end: 1px solid var(--rule); }
.stage-bar {
  position: absolute; inset-block: 0; inset-inline-start: 0; inline-size: 2px;
  background: linear-gradient(to bottom, transparent, var(--rule-accent) 18%, var(--rule-accent) 82%, transparent);
}
.stage-gate .stage-bar { background: linear-gradient(to bottom, transparent, var(--rule-firm) 18%, var(--rule-firm) 82%, transparent); }
.stage:has(.chip-spec) .stage-bar { background: linear-gradient(to bottom, transparent, #4a3c1d 18%, #4a3c1d 82%, transparent); }

/* Explicit placement. Three children into a two-column grid auto-place as
   head/copy/meta across two rows, which reads as a bug: the title sits alone
   beside its own prose. The metadata owns the right column for both rows. */
.stage-head { grid-column: 1; grid-row: 1; display: flex; align-items: center; gap: 1rem; flex-wrap: wrap; margin-block-end: .9rem; }
.stage-no { color: var(--muted); font-size: var(--step--1); letter-spacing: .1em; }
.stage-name { margin: 0; }
.stage-copy { grid-column: 1; grid-row: 2; color: var(--prose); max-width: 40rem; }
.stage-meta { grid-column: 2; grid-row: 1 / 3; display: grid; gap: .55rem; margin: 0; align-content: start; }
.stage-meta div { display: grid; grid-template-columns: 7rem 1fr; gap: .75rem;
                  padding-block-end: .5rem; border-block-end: 1px solid var(--rule); }
.stage-meta div:last-child { border-block-end: 0; }
.stage-meta dt { font-family: var(--mono); font-size: var(--step--2); text-transform: uppercase;
                 letter-spacing: .1em; color: var(--muted); }
.stage-meta dd { margin: 0; font-size: var(--step--2); color: var(--ink); overflow-wrap: anywhere; }

@media (max-width: 54rem) {
  .stage { grid-template-columns: 1fr; gap: 1.25rem; }
  .stage-head, .stage-copy, .stage-meta { grid-column: 1; grid-row: auto; }
  .stage-meta div { grid-template-columns: 6.5rem 1fr; }
}

/* --- walkthrough --------------------------------------------------------- */

.walk-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr)); gap: 1rem; }
.walk-card .label { margin-block-end: .9rem; }
.walk-h { margin-block-end: 1rem; }
.walk-note { display: block; margin-block-start: .9rem; color: var(--muted); }
.walk-draft { grid-column: 1 / -1; }

.signal-list { display: grid; gap: .65rem; }
.signal-list li { display: flex; gap: .7rem; align-items: baseline; font-size: var(--step--1); color: var(--prose); }

.score { display: flex; align-items: baseline; gap: 1rem; margin-block-end: 1.25rem; }
.score-value { font-size: 3rem; line-height: 1; color: var(--accent); letter-spacing: -.03em; }
.score-max { font-size: 1rem; color: var(--muted); }
.bars { display: grid; gap: .5rem; }
.bars li { display: grid; grid-template-columns: 7.5rem 1fr 3rem; gap: .7rem; align-items: center;
           font-size: var(--step--2); color: var(--muted); }
.bars li > span:last-child { text-align: end; color: var(--ink); }
.bar { block-size: 3px; background: var(--surface-3); border-radius: 2px; overflow: hidden; }
.bar i { display: block; block-size: 100%; background: var(--accent-deep); }
.bar i[data-v="70"] { inline-size: 70%; }
.bar i[data-v="85"] { inline-size: 85%; }
.bar i[data-v="90"] { inline-size: 90%; }
.bar i[data-v="95"] { inline-size: 95%; }

.scroll-sentinel { position: absolute; inset-block-start: 0; block-size: 1px; inline-size: 1px; }

.draft-head { display: flex; align-items: center; justify-content: space-between; gap: 1rem; margin-block-end: 1rem; }
.draft { margin: 0 0 1.25rem; padding-inline-start: 1.1rem; border-inline-start: 2px solid var(--rule-accent); }
.draft p { margin-block-end: .8rem; color: var(--prose); }
.draft p:last-child { margin-block-end: 0; }
.checks { display: flex; flex-wrap: wrap; gap: .5rem .9rem; }
.checks li { display: flex; align-items: center; gap: .4rem;
             font-family: var(--mono); font-size: var(--step--2); color: var(--muted); }
.tick { color: var(--accent); }

/* --- architecture -------------------------------------------------------- */

.graph { display: block; margin-block-end: clamp(2rem, 5vw, 3.5rem); }
.graph svg { inline-size: 100%; block-size: auto; overflow: visible; }
.graph .edge { fill: none; stroke: var(--rule-firm); stroke-width: 1; }
.graph .edge-live { stroke: var(--rule-accent); }
.graph .edge-spec { stroke: #4a3c1d; stroke-dasharray: 3 5; }
.graph .pulse { fill: var(--accent); opacity: .9; }
.graph:not(.is-animated) .pulse { display: none; }
.graph .node-halo { fill: var(--surface-1); stroke: var(--rule-firm); }
.graph .node-dot  { fill: var(--accent); }
.graph .node-spec .node-dot { fill: var(--pending); }
.graph .node-spec .node-halo { stroke: #4a3c1d; }
.graph .node-name { fill: var(--ink); font-family: var(--mono); font-size: 13px;
                    letter-spacing: .08em; text-anchor: middle; text-transform: uppercase; }
.graph .node-run  { fill: var(--muted); font-family: var(--mono); font-size: 11px; text-anchor: middle; }
@media (max-width: 48rem) { .graph { overflow-x: auto; } .graph svg { min-inline-size: 34rem; } }

.arch-stack { display: grid; grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr)); gap: clamp(1.5rem, 4vw, 3rem); }
.arch-col .label { margin-block-end: 1.1rem; }

/* --- activity feed ------------------------------------------------------- */

.activity-note { margin-block-start: .75rem; max-width: 16rem; }
.activity-title { margin-block-end: 2rem; max-width: 24ch; }
.feed { display: block; border: 1px solid var(--rule); border-radius: 6px;
        background: var(--surface-1); overflow: hidden; }
.feed-list { display: grid; }
.feed-row {
  display: grid; grid-template-columns: 5.5rem 4.2rem 7rem minmax(0, 1fr);
  gap: 1rem; align-items: baseline;
  padding: .85rem clamp(.9rem, 2.5vw, 1.4rem);
  border-block-end: 1px solid var(--rule);
  font-size: var(--step--1);
  opacity: .28;
  transition: opacity var(--t-move) var(--ease), background var(--t-move) var(--ease);
}
.feed-row:last-child { border-block-end: 0; }
.feed-row.is-on { opacity: 1; }
.feed-row.is-new { background: var(--accent-wash); }
.feed-time  { color: var(--muted); font-size: var(--step--2); }
.feed-wf    { color: var(--accent); font-size: var(--step--2); }
.feed-stage { font-family: var(--mono); font-size: var(--step--2); text-transform: uppercase;
              letter-spacing: .1em; color: var(--ink); }
.feed-text  { color: var(--prose); }
@media (max-width: 52rem) {
  .feed-row { grid-template-columns: 5rem 1fr; gap: .3rem .8rem; }
  .feed-wf { text-align: end; }
  .feed-stage { grid-column: 1 / -1; }
  .feed-text { grid-column: 1 / -1; }
}

/* --- not a lead database ------------------------------------------------- */

.notdb-title { margin-block-end: 1.5rem; }
.notdb-lede { margin-block-end: clamp(2.5rem, 6vw, 4rem); }
.terms { display: grid; grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
         gap: 0; border-block-start: 1px solid var(--rule); }
.terms li {
  display: flex; align-items: baseline; gap: 1rem;
  padding-block: 1.1rem; border-block-end: 1px solid var(--rule);
  font-size: var(--step-2); letter-spacing: var(--track-sub); color: var(--ink);
  padding-inline-end: 1.5rem;
}
.terms-no { font-size: var(--step--2); color: var(--accent); letter-spacing: .1em; }
.notdb-out { margin-block-start: clamp(2.5rem, 6vw, 4rem); max-width: 36rem; color: var(--prose); }
.notdb-out em { font-style: italic; color: var(--accent); }

/* --- versus -------------------------------------------------------------- */

.versus-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(17rem, 1fr));
               gap: clamp(1.5rem, 5vw, 4rem); }
.versus-col .label { margin-block-end: 1.75rem; }
.versus-list { display: grid; gap: .55rem; }
.versus-list li { font-size: var(--step-2); letter-spacing: var(--track-sub); color: var(--muted); }
.versus-old .versus-repeat { color: var(--pending); font-style: italic; }
.versus-flow li { color: var(--ink); position: relative; padding-inline-start: 1.6rem; }
.versus-flow li::before { content: "→"; position: absolute; inset-inline-start: 0;
                          color: var(--accent); font-family: var(--mono); font-size: .8em; }
.versus-flow li:first-child::before { content: "●"; font-size: .55em; }
.versus-note { display: block; margin-block-start: 1.75rem; }

/* --- controls ------------------------------------------------------------ */

.controls-list { display: grid; gap: 0; margin-block-start: 2.5rem; counter-reset: c; }
.controls-list li { counter-increment: c; padding-block: 1.6rem; border-block-start: 1px solid var(--rule); }
.controls-list li:first-child { border-block-start: 0; padding-block-start: 0; }
.controls-list h3 { position: relative; margin-block-end: .6rem; padding-inline-start: 2.6rem; }
.controls-list h3::before {
  content: counter(c, decimal-leading-zero);
  position: absolute; inset-inline-start: 0; inset-block-start: .25em;
  font-family: var(--mono); font-size: var(--step--2); color: var(--accent); letter-spacing: .1em;
}
.controls-list p { padding-inline-start: 2.6rem; color: var(--prose); max-width: 42rem; }
@media (max-width: 40rem) {
  .controls-list h3, .controls-list p { padding-inline-start: 0; }
  .controls-list h3::before { position: static; display: block; margin-block-end: .4rem; }
}

/* --- status -------------------------------------------------------------- */

.status-grid { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
               gap: clamp(2rem, 5vw, 4rem); align-items: start; }
.wf-table { inline-size: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; }
.wf-table th {
  text-align: start; font-family: var(--mono); font-size: var(--step--2);
  text-transform: uppercase; letter-spacing: .1em; color: var(--muted);
  font-weight: 500; padding-block: .6rem; border-block-end: 1px solid var(--rule-firm);
}
.wf-table td { padding-block: .7rem; border-block-end: 1px solid var(--rule);
               font-size: var(--step--1); color: var(--ink); vertical-align: baseline; }
.wf-table td:first-child { color: var(--muted); inline-size: 5rem; }
.wf-table td:last-child { text-align: end; }
.wf-table tr.is-spec td:nth-child(2) { color: var(--muted); }

.status-aside .label { margin-block-end: 1.25rem; }
.pull { font-size: var(--step-2); line-height: 1.25; letter-spacing: var(--track-sub);
        color: var(--ink); margin-block-end: 1.5rem; }
.status-note { color: var(--muted); }
@media (max-width: 54rem) { .status-grid { grid-template-columns: 1fr; } }

/* --- final cta ----------------------------------------------------------- */

.cta { border-block-end: 1px solid var(--rule); }
.cta-inner { text-align: center; }
.cta-title { font-size: var(--step-4); line-height: 1.02; letter-spacing: var(--track-disp);
             margin-block-end: 2.5rem; }
.cta-title em { font-style: italic; color: var(--accent); }
.cta-actions { justify-content: center; }
.cta-note { display: block; margin-block-start: 2rem; color: var(--muted); }

/* --- footer -------------------------------------------------------------- */

.foot { padding-block: clamp(3rem, 7vw, 5rem); }
.foot-inner { display: grid; grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr));
              gap: clamp(1.75rem, 4vw, 3rem); align-items: start; }
.foot .label { margin-block-end: .9rem; }
.foot p { font-size: var(--step--1); }
.foot-brand .meta { max-width: 22rem; }