/* Avid Field Lab styles. Builds on /styles.css variables. */
.header { background: rgba(255,255,255,0.96) !important; box-shadow: 0 1px 0 rgba(0,0,0,0.08) !important; backdrop-filter: blur(12px); }
.nav-links a { color: var(--dark) !important; }
.nav-links a:hover, .nav-links a.active { color: var(--primary) !important; }
.mobile-menu-toggle { color: var(--dark) !important; }

.fl-page { padding-top: 76px; background: var(--gray-50); min-height: 100vh; }
.fl-eyebrow { display: inline-flex; align-items: center; gap: .5rem; background: #f0f4ff; border: 1px solid #c7d7f5; color: #1e40af; padding: .4rem 1rem; font-size: .78rem; font-weight: 700; letter-spacing: .8px; text-transform: uppercase; }

/* ---------- Hub ---------- */
.fl-hero { padding: 4.5rem 0 3rem; background: #fff; border-bottom: 1px solid var(--gray-200); }
.fl-hero-grid { display: grid; grid-template-columns: 1.05fr 1fr; gap: 3rem; align-items: center; }
.fl-hero h1 { font-size: clamp(2.3rem, 4.6vw, 3.5rem); font-weight: 800; line-height: 1.08; color: var(--dark); margin: 1.25rem 0 1rem; letter-spacing: -.5px; }
.fl-hero h1 span { color: var(--primary); }
.fl-hero p.lead { font-size: 1.15rem; color: var(--text-light); max-width: 34rem; margin-bottom: 2rem; }
.fl-hero-actions { display: flex; gap: .75rem; flex-wrap: wrap; }
.btn-ghost { background: #fff; color: var(--dark); border-color: var(--gray-300); }
.btn-ghost:hover { border-color: var(--primary); color: var(--primary); }
.fl-hero-art { position: relative; aspect-ratio: 4 / 3; background: var(--dark); border: 1px solid var(--gray-200); overflow: hidden; }
.fl-hero-art img { width: 100%; height: 100%; object-fit: cover; display: block; }
.fl-hero-art figcaption { position: absolute; left: 0; bottom: 0; right: 0; padding: .75rem 1rem; background: linear-gradient(transparent, rgba(11,24,39,.85)); color: #fff; font-size: .85rem; font-weight: 600; }

.fl-filter { display: flex; gap: .5rem; flex-wrap: wrap; margin: 0 0 2rem; }
.fl-chip { border: 1px solid var(--gray-300); background: #fff; padding: .45rem .95rem; font: inherit; font-size: .88rem; font-weight: 600; color: var(--text); cursor: pointer; }
.fl-chip[aria-pressed="true"] { background: var(--dark); color: #fff; border-color: var(--dark); }
.fl-chip .n { opacity: .6; margin-left: .3rem; font-weight: 500; }

.fl-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 1.5rem; }
.fl-card { background: #fff; border: 1px solid var(--gray-200); display: flex; flex-direction: column; transition: var(--transition); }
.fl-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-xl); border-color: #c7d7f5; }
.fl-card .thumb { aspect-ratio: 16 / 10; background: #e9eef5; overflow: hidden; border-bottom: 1px solid var(--gray-200); position: relative; }
.fl-card .thumb img { width: 100%; height: 100%; object-fit: cover; display: block; }
.fl-card .kind { position: absolute; top: .75rem; left: .75rem; background: rgba(11,24,39,.85); color: #fff; font-size: .7rem; font-weight: 700; letter-spacing: .8px; text-transform: uppercase; padding: .3rem .6rem; }
.fl-card .body { padding: 1.25rem 1.35rem 1.4rem; display: flex; flex-direction: column; gap: .55rem; flex: 1; }
.fl-card .meta { display: flex; gap: .75rem; font-size: .78rem; font-weight: 700; color: var(--secondary); text-transform: uppercase; letter-spacing: .6px; }
.fl-card .meta span + span { color: var(--text-muted); }
.fl-card h3 { font-size: 1.2rem; font-weight: 800; color: var(--dark); line-height: 1.25; }
.fl-card p { color: var(--text-light); font-size: .95rem; flex: 1; }
.fl-card .go { font-weight: 700; color: var(--primary); font-size: .92rem; margin-top: .3rem; }
.fl-card.ibm .meta { color: var(--primary); }

.fl-how { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; border: 1px solid var(--gray-200); background: #fff; }
.fl-how > div { padding: 2rem 1.75rem; border-right: 1px solid var(--gray-200); }
.fl-how > div:last-child { border-right: none; }
.fl-how .num { font-size: .8rem; font-weight: 800; color: var(--primary); letter-spacing: 1px; }
.fl-how h3 { font-size: 1.15rem; font-weight: 800; color: var(--dark); margin: .5rem 0 .4rem; }
.fl-how p { color: var(--text-light); font-size: .95rem; }

.fl-staff { background: var(--dark); color: #fff; padding: 3rem; display: grid; grid-template-columns: 1fr 1fr; gap: 2.5rem; }
.fl-staff h2 { font-size: 1.75rem; font-weight: 800; margin: .75rem 0; }
.fl-staff p, .fl-staff li { color: rgba(255,255,255,.78); }
.fl-staff ol { list-style: decimal; padding-left: 1.25rem; display: grid; gap: .6rem; }
.fl-staff code { background: rgba(255,255,255,.1); padding: .1rem .35rem; font-size: .88em; }
.fl-staff .fl-eyebrow { background: rgba(96,165,250,.12); border-color: rgba(96,165,250,.35); color: #93c5fd; }

/* ---------- Explainer page ---------- */
.fl-crumbs { font-size: .85rem; color: var(--text-muted); padding: 1.25rem 0 .75rem; }
.fl-crumbs a { color: var(--primary); font-weight: 600; }
.fl-lab { display: grid; grid-template-columns: minmax(0, 1fr) 380px; gap: 0; background: #fff; border: 1px solid var(--gray-200); }
.fl-stage { position: relative; min-height: 620px; height: calc(100vh - 170px); max-height: 820px; background: #eef2f7; overflow: hidden; touch-action: none; }
.fl-stage canvas { display: block; outline: none; }
.fl-stage .hint { position: absolute; left: 1rem; bottom: 1rem; background: rgba(255,255,255,.92); border: 1px solid var(--gray-200); padding: .45rem .75rem; font-size: .78rem; color: var(--text-light); pointer-events: none; }
.fl-stage .readouts { position: absolute; top: 1rem; left: 1rem; display: flex; gap: .5rem; flex-wrap: wrap; pointer-events: none; max-width: calc(100% - 2rem); }
.fl-stage .readout { background: rgba(11,24,39,.88); color: #fff; padding: .55rem .8rem; min-width: 7.5rem; }
.fl-stage .readout small { display: block; font-size: .66rem; letter-spacing: .7px; text-transform: uppercase; color: rgba(255,255,255,.65); font-weight: 700; }
.fl-stage .readout b { font-size: 1.15rem; font-weight: 800; font-variant-numeric: tabular-nums; }
.lab-labels { position: absolute; inset: 0; pointer-events: none; }
.lab-label { position: absolute; left: 0; top: 0; background: #fff; color: var(--dark); border: 1px solid var(--gray-300); padding: .2rem .5rem; font-size: .74rem; font-weight: 700; white-space: nowrap; box-shadow: var(--shadow); margin-top: -6px; }

.fl-panel { border-left: 1px solid var(--gray-200); display: flex; flex-direction: column; max-height: calc(100vh - 170px); min-height: 620px; overflow: auto; }
.fl-panel section { padding: 1.25rem 1.4rem; border-bottom: 1px solid var(--gray-200); }
.fl-panel h1 { font-size: 1.55rem; font-weight: 800; line-height: 1.2; color: var(--dark); margin: .6rem 0 .5rem; }
.fl-panel .answer { color: var(--text); font-size: .98rem; }
.fl-panel h2 { font-size: .74rem; letter-spacing: 1px; text-transform: uppercase; color: var(--text-muted); font-weight: 800; margin-bottom: .75rem; }
.lab-steps { list-style: none; counter-reset: s; display: grid; gap: .4rem; }
.lab-steps li { counter-increment: s; border: 1px solid var(--gray-200); padding: .65rem .8rem .65rem 2.6rem; position: relative; cursor: pointer; font-size: .9rem; color: var(--text-light); transition: var(--transition); }
.lab-steps li::before { content: counter(s); position: absolute; left: .75rem; top: .62rem; width: 1.35rem; height: 1.35rem; background: var(--gray-100); color: var(--dark); font-weight: 800; font-size: .75rem; display: grid; place-items: center; }
.lab-steps li strong { display: block; color: var(--dark); font-size: .93rem; }
.lab-steps li:hover, .lab-steps li:focus-visible { border-color: #c7d7f5; outline: none; }
.lab-steps li.active { border-color: var(--primary); background: #f5f8ff; }
.lab-steps li.active::before { background: var(--primary); color: #fff; }

.fl-controls { display: grid; gap: 1rem; }
.fl-row { display: flex; gap: .5rem; flex-wrap: wrap; align-items: center; }
.fl-btn { border: 1px solid var(--gray-300); background: #fff; padding: .5rem .85rem; font: inherit; font-size: .86rem; font-weight: 700; color: var(--dark); cursor: pointer; display: inline-flex; gap: .45rem; align-items: center; }
.fl-btn:hover { border-color: var(--primary); color: var(--primary); }
.fl-btn.primary { background: var(--primary); color: #fff; border-color: var(--primary); }
.fl-field label { display: flex; justify-content: space-between; font-size: .84rem; font-weight: 700; color: var(--dark); margin-bottom: .35rem; }
.fl-field label output { color: var(--primary); font-variant-numeric: tabular-nums; }
.fl-field input[type=range] { width: 100%; accent-color: var(--primary); }
.fl-field .note { font-size: .78rem; color: var(--text-muted); margin-top: .25rem; }
.fl-check { display: flex; align-items: center; gap: .5rem; font-size: .88rem; font-weight: 600; color: var(--text); cursor: pointer; }
.fl-check input { accent-color: var(--primary); width: 1rem; height: 1rem; }
.fl-seg { display: inline-flex; border: 1px solid var(--gray-300); }
.fl-seg label { cursor: pointer; }
.fl-seg input { position: absolute; opacity: 0; pointer-events: none; }
.fl-seg span { display: block; padding: .45rem .85rem; font-size: .85rem; font-weight: 700; color: var(--text-light); }
.fl-seg input:checked + span { background: var(--dark); color: #fff; }
.fl-seg input:focus-visible + span { outline: 2px solid var(--primary); outline-offset: -2px; }

.fl-deep { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 3rem; padding: 3.5rem 0 4.5rem; }
.fl-deep article h2 { font-size: 1.6rem; font-weight: 800; color: var(--dark); margin: 2rem 0 .75rem; line-height: 1.25; }
.fl-deep article h2:first-child { margin-top: 0; }
.fl-deep article p { color: var(--text); font-size: 1.02rem; margin-bottom: 1rem; max-width: 44rem; }
.fl-deep article .callout { border-left: 3px solid var(--secondary); background: #fff; padding: 1rem 1.25rem; margin: 1.5rem 0; max-width: 44rem; }
.fl-deep article .callout strong { color: var(--secondary-dark); }
.fl-aside { display: grid; gap: 1.25rem; align-content: start; }
.fl-aside .box { background: #fff; border: 1px solid var(--gray-200); padding: 1.25rem 1.35rem; }
.fl-aside h3 { font-size: .74rem; letter-spacing: 1px; text-transform: uppercase; color: var(--text-muted); font-weight: 800; margin-bottom: .75rem; }
.fl-aside ul { display: grid; gap: .6rem; }
.fl-aside li { font-size: .9rem; }
.fl-aside li a { color: var(--primary); font-weight: 600; }
.fl-aside li small { display: block; color: var(--text-muted); }
.fl-aside .avid { background: #f5f8ff; border-color: #c7d7f5; }
.fl-aside .avid p { font-size: .92rem; color: var(--text); }

.fl-next { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 1rem; margin-top: 1rem; }
.fl-next a { background: #fff; border: 1px solid var(--gray-200); padding: 1rem 1.15rem; font-weight: 700; color: var(--dark); }
.fl-next a small { display: block; font-size: .72rem; color: var(--secondary); letter-spacing: .6px; text-transform: uppercase; margin-bottom: .2rem; }
.fl-next a:hover { border-color: var(--primary); color: var(--primary); }

/* ---------- Reference page ---------- */
.ref-search { width: 100%; padding: .85rem 1rem; border: 1px solid var(--gray-300); font: inherit; font-size: 1rem; background: #fff; }
.ref-search:focus { outline: 2px solid var(--primary); outline-offset: -1px; }
.ref-layer { margin-top: 2.5rem; }
.ref-layer > h2 { font-size: 1.35rem; font-weight: 800; color: var(--dark); display: flex; align-items: center; gap: .6rem; margin-bottom: 1rem; }
.ref-layer > h2 i { color: var(--primary); }
.ref-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)); gap: 1.25rem; }
.ref-card { background: #fff; border: 1px solid var(--gray-200); padding: 1.35rem 1.4rem; display: flex; flex-direction: column; gap: .65rem; }
.ref-card h3 { font-size: 1.15rem; font-weight: 800; color: var(--dark); }
.ref-card .what { color: var(--text); font-size: .95rem; }
.ref-card dl { display: grid; gap: .55rem; font-size: .9rem; }
.ref-card dt { font-weight: 800; color: var(--dark); font-size: .74rem; letter-spacing: .7px; text-transform: uppercase; }
.ref-card dd { color: var(--text-light); }
.ref-card .tags { display: flex; gap: .35rem; flex-wrap: wrap; }
.ref-card .tags span { font-size: .74rem; font-weight: 700; background: var(--gray-100); color: var(--text-light); padding: .2rem .5rem; }
.ref-card .links { margin-top: auto; padding-top: .5rem; display: flex; gap: 1rem; flex-wrap: wrap; font-size: .88rem; font-weight: 700; }
.ref-card .links a { color: var(--primary); }
.ref-empty { padding: 2rem; text-align: center; color: var(--text-muted); display: none; }

@media (max-width: 1024px) {
  .fl-hero-grid, .fl-staff { grid-template-columns: 1fr; }
  .fl-lab { grid-template-columns: 1fr; }
  .fl-stage { height: 62vh; min-height: 420px; }
  .fl-panel { border-left: none; border-top: 1px solid var(--gray-200); max-height: none; min-height: 0; }
  .fl-deep { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
  .fl-how { grid-template-columns: 1fr; }
  .fl-how > div { border-right: none; border-bottom: 1px solid var(--gray-200); }
  .fl-staff { padding: 2rem 1.25rem; }
  .fl-hero { padding: 3rem 0 2rem; }
  .fl-grid, .ref-grid { grid-template-columns: 1fr; }
  .fl-stage { height: 56vh; min-height: 360px; }
  .fl-stage .readout { min-width: 0; padding: .4rem .6rem; }
  .fl-stage .readout b { font-size: .95rem; }
  .fl-stage .hint { display: none; }
}

/* ---------- Library results, RAG chunks, stack info ---------- */
.lib-results { list-style: none; display: grid; gap: .6rem; }
.lib-results li { background: #fff; border: 1px solid var(--gray-200); padding: .85rem 1.1rem; }
.lib-results a { font-weight: 700; color: var(--primary); }
.lib-results .prod { margin-left: .6rem; font-size: .72rem; font-weight: 700; color: var(--text-light); background: var(--gray-100); padding: .15rem .45rem; white-space: nowrap; }
.lib-results p { color: var(--text-light); font-size: .88rem; margin-top: .25rem; }
.rag-chunks { display: grid; gap: .45rem; }
.rag-chunks .chunk { border: 1px solid var(--gray-200); border-left: 3px solid var(--c, var(--primary)); padding: .5rem .65rem; font-size: .82rem; color: var(--text); }
.rag-chunks .chunk b { display: flex; justify-content: space-between; gap: .5rem; font-size: .72rem; text-transform: uppercase; letter-spacing: .5px; color: var(--text-light); margin-bottom: .15rem; }
.rag-chunks .answerbox { background: #f5f8ff; border: 1px solid #c7d7f5; padding: .75rem .85rem; font-size: .88rem; }
.rag-chunks .answerbox strong { display: block; font-size: .72rem; letter-spacing: .6px; text-transform: uppercase; color: var(--primary); margin-bottom: .25rem; }
.stack-info { border: 1px solid var(--gray-200); padding: .85rem 1rem; background: var(--gray-50); }
.stack-info h3 { font-size: 1.05rem; font-weight: 800; color: var(--dark); margin-bottom: .2rem; }
.stack-info .layer { font-size: .72rem; font-weight: 800; letter-spacing: .6px; text-transform: uppercase; color: var(--secondary); }
.stack-info p { font-size: .88rem; color: var(--text); margin-top: .35rem; }
.stack-info a { color: var(--primary); font-weight: 700; font-size: .86rem; }
.stack-info .note, .fl-panel .note { font-size: .82rem; color: var(--text-muted); }

@media (max-width: 720px) {
  .fl-stage .readouts { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: .35rem; top: .6rem; left: .6rem; right: .6rem; max-width: none; }
  .fl-stage .readout small { font-size: .56rem; letter-spacing: .4px; }
  .fl-stage .readout b { font-size: .85rem; }
  .lab-label { font-size: .62rem; padding: .12rem .35rem; }
}