:root {
  --bg: #07111f;
  --bg-soft: #0c1b2d;
  --surface: rgba(16, 35, 56, 0.88);
  --surface-solid: #102338;
  --surface-light: #142c46;
  --text: #f4f8fb;
  --muted: #aab9c8;
  --cyan: #3ad8ff;
  --blue: #377dff;
  --lime: #a8ff3e;
  --orange: #ffad42;
  --red: #ff6673;
  --line: rgba(255,255,255,0.12);
  --shadow: 0 24px 60px rgba(0,0,0,0.28);
  --radius: 24px;
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 10% 10%, rgba(55,125,255,.16), transparent 30%),
    radial-gradient(circle at 90% 20%, rgba(58,216,255,.12), transparent 28%),
    var(--bg);
  line-height: 1.65;
}
body.menu-open { overflow: hidden; }

a { color: inherit; }
button, input { font: inherit; }
button { color: inherit; }
img, svg, canvas { max-width: 100%; }
canvas { display: block; }

.container { width: min(calc(100% - 40px), var(--max)); margin-inline: auto; }
.section { padding: 110px 0; position: relative; }
.section-alt { background: linear-gradient(180deg, rgba(255,255,255,.025), rgba(255,255,255,.01)); }
.section-grid {
  background-image:
    linear-gradient(rgba(255,255,255,.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.025) 1px, transparent 1px);
  background-size: 44px 44px;
}

.skip-link {
  position: fixed; left: 16px; top: -80px; z-index: 1000;
  background: white; color: #111; padding: 12px 16px; border-radius: 8px;
}
.skip-link:focus { top: 16px; }

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

.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  background: rgba(7,17,31,.78); backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--line);
}
.nav-wrap { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { text-decoration: none; display: flex; align-items: center; gap: 12px; }
.brand-mark {
  width: 44px; height: 44px; border-radius: 14px; display: grid; place-items: center;
  color: #04101c; font-weight: 900; background: linear-gradient(135deg, var(--cyan), var(--lime));
  box-shadow: 0 0 30px rgba(58,216,255,.24);
}
.brand strong, .brand small { display: block; }
.brand strong { font-size: .95rem; }
.brand small { color: var(--muted); font-size: .72rem; }
.site-nav { display: flex; align-items: center; gap: 22px; }
.site-nav a { text-decoration: none; color: var(--muted); font-size: .9rem; font-weight: 700; }
.site-nav a:hover, .site-nav a.active { color: var(--cyan); }
.site-nav .nav-cta {
  color: var(--text); border: 1px solid var(--line); border-radius: 999px; padding: 9px 14px;
  background: rgba(255,255,255,.04);
}
.nav-toggle { display: none; border: 0; background: transparent; padding: 8px; }
.nav-toggle span:not(.sr-only) { display: block; width: 26px; height: 2px; background: white; margin: 5px 0; }

.hero { min-height: 100vh; padding: 150px 0 90px; position: relative; overflow: hidden; display: grid; align-items: center; }
.hero-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: 70px; align-items: center; position: relative; z-index: 2; }
.hero-glow { position: absolute; border-radius: 50%; filter: blur(80px); opacity: .45; }
.hero-glow-one { width: 420px; height: 420px; background: rgba(55,125,255,.35); top: 10%; left: -120px; }
.hero-glow-two { width: 320px; height: 320px; background: rgba(168,255,62,.14); right: -60px; bottom: 5%; }

.eyebrow, .phase-kicker, .card-kicker {
  margin: 0 0 14px; color: var(--cyan); text-transform: uppercase; letter-spacing: .15em; font-size: .76rem; font-weight: 850;
}
.hero h1 {
  font-size: clamp(3.1rem, 7vw, 6.4rem); line-height: .96; letter-spacing: -.055em; margin: 0;
  max-width: 900px;
}
.hero h1 span { display: block; color: transparent; background: linear-gradient(90deg, var(--cyan), var(--lime)); -webkit-background-clip: text; background-clip: text; }
.hero-lead { font-size: 1.12rem; color: var(--muted); max-width: 710px; margin: 26px 0 0; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin: 34px 0 36px; }
.button {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 50px;
  padding: 0 22px; border-radius: 999px; font-weight: 850; text-decoration: none; transition: .25s ease;
}
.button-primary { color: #03111c; background: linear-gradient(135deg, var(--cyan), var(--lime)); box-shadow: 0 12px 30px rgba(58,216,255,.2); }
.button-secondary { border: 1px solid var(--line); background: rgba(255,255,255,.045); }
.button:hover { transform: translateY(-2px); }

.hero-meta { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.hero-meta div { padding: 14px 0; border-top: 1px solid var(--line); }
.hero-meta strong, .hero-meta span { display: block; }
.hero-meta strong { font-size: .8rem; color: var(--muted); }
.hero-meta span { font-weight: 800; margin-top: 3px; }

.hero-panel {
  background: linear-gradient(180deg, rgba(20,44,70,.95), rgba(10,27,45,.96));
  border: 1px solid rgba(58,216,255,.22); border-radius: 30px; padding: 28px;
  box-shadow: var(--shadow), inset 0 1px rgba(255,255,255,.08);
}
.panel-label { color: var(--muted); font-weight: 800; text-align: center; letter-spacing: .08em; text-transform: uppercase; font-size: .78rem; }
.gauge-wrap { width: min(100%, 310px); margin: 20px auto; position: relative; }
.gauge { transform: rotate(-90deg); }
.gauge-track, .gauge-progress { fill: none; stroke-width: 16; }
.gauge-track { stroke: rgba(255,255,255,.08); }
.gauge-progress {
  stroke: url(#gaugeGradient); stroke: var(--cyan); stroke-linecap: round;
  stroke-dasharray: 553; stroke-dashoffset: 553; transition: stroke-dashoffset 1.8s cubic-bezier(.2,.7,.2,1);
  filter: drop-shadow(0 0 8px rgba(58,216,255,.6));
}
.gauge-center { position: absolute; inset: 0; display: grid; place-content: center; text-align: center; }
.gauge-center span { font-size: 3.6rem; font-weight: 900; letter-spacing: -.05em; }
.gauge-center small { color: var(--muted); }
.before-after-mini { display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 12px; }
.before-after-mini div:not(.arrow) { background: rgba(255,255,255,.04); border: 1px solid var(--line); border-radius: 16px; padding: 14px; text-align: center; }
.before-after-mini span, .before-after-mini strong { display: block; }
.before-after-mini span { color: var(--muted); font-size: .78rem; }
.before-after-mini strong { font-size: 1.4rem; }
.before-after-mini .arrow { color: var(--lime); font-size: 1.5rem; }
.panel-note { color: var(--muted); font-size: .87rem; margin: 18px 0 0; }

.metrics-strip { border-block: 1px solid var(--line); background: rgba(255,255,255,.025); }
.metrics-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.metric-card { padding: 28px 24px; text-align: center; border-right: 1px solid var(--line); }
.metric-card:last-child { border-right: 0; }
.metric-icon { display: inline-grid; place-items: center; width: 34px; height: 34px; border-radius: 11px; background: rgba(58,216,255,.1); color: var(--cyan); margin-bottom: 8px; }
.metric-card strong { display: block; font-size: 2rem; letter-spacing: -.04em; }
.metric-card p { margin: 4px 0 0; color: var(--muted); font-size: .9rem; }

.section-heading { max-width: 820px; margin-bottom: 44px; }
.section-heading h2, .phase-heading h2, .cta-section h2 {
  margin: 0; font-size: clamp(2.3rem, 4vw, 4rem); line-height: 1.08; letter-spacing: -.045em;
}
.section-heading > p:last-child { color: var(--muted); font-size: 1.05rem; }
.phase-heading { margin-bottom: 44px; }
.phase-kicker { display: inline-flex; border: 1px solid rgba(58,216,255,.25); background: rgba(58,216,255,.07); border-radius: 999px; padding: 8px 13px; }

.summary-tabs { display: flex; gap: 10px; flex-wrap: wrap; }
.summary-tab {
  border: 1px solid var(--line); background: rgba(255,255,255,.025); border-radius: 999px; padding: 11px 16px; cursor: pointer; font-weight: 750;
}
.summary-tab.active { color: #05111b; background: var(--cyan); border-color: var(--cyan); }
.summary-panel {
  margin-top: 16px; min-height: 210px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 34px; box-shadow: var(--shadow);
}
.summary-content { display: none; grid-template-columns: 180px 1fr; gap: 30px; align-items: center; }
.summary-content.active { display: grid; }
.summary-number { font-size: 4.5rem; font-weight: 950; color: transparent; background: linear-gradient(135deg, var(--cyan), var(--lime)); background-clip: text; -webkit-background-clip: text; }
.summary-content h3 { margin: 0 0 8px; font-size: 1.65rem; }
.summary-content p { color: var(--muted); margin: 0; }

.dmaic-roadmap { display: grid; grid-template-columns: repeat(5, 1fr); margin-top: 28px; gap: 12px; }
.phase {
  min-height: 170px; padding: 20px; background: linear-gradient(180deg, rgba(255,255,255,.055), rgba(255,255,255,.025));
  border: 1px solid var(--line); border-radius: 20px; text-decoration: none; transition: .25s ease;
}
.phase:hover { transform: translateY(-5px); border-color: rgba(58,216,255,.5); }
.phase span, .phase strong, .phase small { display: block; }
.phase span { color: var(--cyan); font-size: .78rem; font-weight: 850; }
.phase strong { margin-top: 38px; font-size: 1.25rem; }
.phase small { color: var(--muted); margin-top: 5px; }

.two-column { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.content-card, .scope-card, .data-card, .control-card {
  background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px;
}
.content-card h3, .scope-card h3 { margin: 0 0 10px; font-size: 1.55rem; }
.content-card p:last-child, .scope-card p { color: var(--muted); margin-bottom: 0; }

.scope-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 22px; margin-top: 22px; }
.check-list, .x-list { list-style: none; padding: 0; margin: 0; }
.check-list li, .x-list li { position: relative; padding: 9px 0 9px 30px; color: var(--muted); border-bottom: 1px solid var(--line); }
.check-list li:last-child, .x-list li:last-child { border-bottom: 0; }
.check-list li::before, .x-list li::before { position: absolute; left: 0; font-weight: 900; }
.check-list li::before { content: "✓"; color: var(--lime); }
.x-list li::before { content: "×"; color: var(--red); }
.timeline-row { display: flex; justify-content: space-between; padding: 10px 0; border-bottom: 1px solid var(--line); }
.timeline-row span { color: var(--muted); }

.interactive-process { margin-top: 22px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; }
.process-header { display: grid; grid-template-columns: 1fr 1fr; align-items: end; gap: 30px; }
.process-header h3 { margin: 0; }
.process-description { margin: 0; color: var(--muted); text-align: right; }
.sipoc-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; margin-top: 24px; }
.sipoc-grid button {
  min-height: 150px; border: 1px solid var(--line); background: rgba(255,255,255,.03); border-radius: 18px; cursor: pointer; padding: 18px; text-align: left; transition: .2s ease;
}
.sipoc-grid button:hover, .sipoc-grid button:focus { transform: translateY(-4px); border-color: var(--cyan); background: rgba(58,216,255,.07); outline: none; }
.sipoc-grid span, .sipoc-grid strong, .sipoc-grid small { display: block; }
.sipoc-grid span { color: var(--cyan); font-size: 2rem; font-weight: 950; }
.sipoc-grid strong { margin-top: 24px; }
.sipoc-grid small { color: var(--muted); }

.chart-toolbar { display: flex; justify-content: space-between; align-items: end; gap: 20px; margin-bottom: 16px; }
.chart-toolbar h3 { margin: 0; font-size: 1.6rem; }
.segmented-control { display: flex; gap: 6px; background: rgba(255,255,255,.04); border: 1px solid var(--line); border-radius: 999px; padding: 5px; }
.segmented-control button { border: 0; background: transparent; border-radius: 999px; padding: 9px 13px; cursor: pointer; color: var(--muted); }
.segmented-control button.active { color: #05111b; background: var(--cyan); font-weight: 850; }

.chart-card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; box-shadow: var(--shadow); }
.chart-legend { display: flex; justify-content: center; gap: 24px; color: var(--muted); font-size: .85rem; margin-top: 10px; }
.chart-legend i { width: 14px; height: 4px; display: inline-block; margin-right: 7px; vertical-align: middle; border-radius: 999px; }
.legend-before { background: var(--orange); }
.legend-after { background: var(--lime); }
.measure-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; margin-top: 22px; }
.data-card span, .data-card strong { display: block; }
.data-label { color: var(--cyan); font-size: .78rem; font-weight: 850; text-transform: uppercase; letter-spacing: .12em; }
.data-card strong { font-size: 1.75rem; margin-top: 12px; }
.data-card p { color: var(--muted); margin-bottom: 0; }
.lead-time-card { display: grid; grid-template-columns: .85fr 1.15fr; gap: 34px; align-items: center; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 30px; margin-top: 22px; }
.lead-copy h3 { margin: 0; font-size: 1.8rem; }
.lead-copy > p:last-of-type { color: var(--muted); }
.lead-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; margin-top: 24px; }
.lead-stats div { padding: 12px; border-radius: 14px; background: rgba(255,255,255,.035); border: 1px solid var(--line); }
.lead-stats strong, .lead-stats span { display: block; }
.lead-stats strong { font-size: 1.5rem; }
.lead-stats span { color: var(--muted); font-size: .72rem; }

.fishbone-card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 30px; overflow: hidden; }
.fishbone-intro { max-width: 700px; }
.fishbone-intro h3 { margin: 0; font-size: 1.6rem; }
#fishbone-detail { color: var(--muted); min-height: 52px; }
.fishbone { position: relative; height: 460px; margin-top: 16px; }
.fishbone-spine { position: absolute; left: 12%; right: 15%; top: 50%; height: 6px; background: linear-gradient(90deg, var(--cyan), var(--lime)); border-radius: 999px; }
.fishbone-head {
  position: absolute; right: 0; top: calc(50% - 46px); width: 170px; min-height: 96px; display: grid; place-items: center; text-align: center;
  padding: 15px; border-radius: 50% 18px 18px 50%; background: linear-gradient(135deg, var(--blue), #6e39ff); font-weight: 900;
}
.bone {
  position: absolute; border: 1px solid var(--line); border-radius: 14px; background: rgba(255,255,255,.05); padding: 12px 16px; cursor: pointer; min-width: 130px; font-weight: 800;
}
.bone::after { content: ""; position: absolute; width: 150px; height: 3px; background: rgba(58,216,255,.5); }
.bone:hover, .bone.active { background: var(--cyan); color: #05111b; }
.bone-1 { left: 4%; top: 12%; } .bone-1::after { left: 85%; top: 110%; transform: rotate(32deg); transform-origin: left; }
.bone-2 { left: 32%; top: 7%; } .bone-2::after { left: 72%; top: 115%; transform: rotate(47deg); transform-origin: left; }
.bone-3 { left: 58%; top: 14%; } .bone-3::after { left: 48%; top: 110%; transform: rotate(64deg); transform-origin: left; }
.bone-4 { left: 4%; bottom: 10%; } .bone-4::after { left: 85%; bottom: 110%; transform: rotate(-32deg); transform-origin: left; }
.bone-5 { left: 32%; bottom: 5%; } .bone-5::after { left: 72%; bottom: 115%; transform: rotate(-47deg); transform-origin: left; }
.bone-6 { left: 58%; bottom: 12%; } .bone-6::after { left: 48%; bottom: 110%; transform: rotate(-64deg); transform-origin: left; }

.hypothesis-section { margin-top: 22px; }
.section-subheading h3 { margin: 0 0 18px; font-size: 1.55rem; }
.hypothesis-table { display: grid; gap: 8px; }
.hypothesis-row { display: grid; grid-template-columns: 1fr auto; width: 100%; border: 1px solid var(--line); background: var(--surface); border-radius: 15px; padding: 16px 18px; text-align: left; cursor: pointer; }
.hypothesis-row strong { color: var(--muted); }
.hypothesis-row.verified:hover, .hypothesis-row.verified.active { border-color: var(--lime); }
.hypothesis-row.rejected:hover, .hypothesis-row.rejected.active { border-color: var(--red); }
.hypothesis-row.verified strong { color: var(--lime); }
.hypothesis-row.rejected strong { color: var(--red); }
.evidence-box { margin-top: 10px; border-left: 4px solid var(--cyan); background: rgba(58,216,255,.06); padding: 16px 18px; border-radius: 0 14px 14px 0; color: var(--muted); }

.value-analysis { margin-top: 22px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; }
.value-analysis h3 { margin: 0; }
.stacked-bar { display: flex; height: 60px; border-radius: 14px; overflow: hidden; margin: 24px 0 12px; }
.stacked-bar > div { display: grid; place-items: center; padding: 8px; font-size: .75rem; font-weight: 850; text-align: center; }
.bar-va { background: var(--lime); color: #07111f; }
.bar-nva { background: var(--orange); color: #07111f; }
.bar-wait { background: var(--blue); }
.value-analysis > p { color: var(--muted); margin-bottom: 0; }

.solution-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.solution-card { min-height: 250px; border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; background: linear-gradient(180deg, rgba(255,255,255,.05), rgba(255,255,255,.02)); }
.solution-card span { color: var(--cyan); font-weight: 900; }
.solution-card h3 { margin: 55px 0 10px; }
.solution-card p { color: var(--muted); }

.process-comparison { margin-top: 22px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; }
.comparison-header { display: flex; justify-content: space-between; gap: 24px; align-items: end; }
.comparison-header h3 { margin: 0; }
.comparison-stats { display: flex; gap: 12px; flex-wrap: wrap; }
.comparison-stats span { padding: 9px 12px; border: 1px solid var(--line); border-radius: 999px; color: var(--muted); font-size: .83rem; }
.comparison-stats strong { color: var(--lime); }
.comparison-stage { height: 320px; position: relative; overflow: hidden; border-radius: 18px; margin-top: 24px; border: 1px solid var(--line); background: #091728; }
.process-map { position: absolute; inset: 0; display: flex; flex-wrap: wrap; align-content: center; justify-content: center; gap: 9px; padding: 38px; }
.before-map { background: linear-gradient(135deg, rgba(255,173,66,.08), rgba(255,102,115,.08)); }
.after-map { background: linear-gradient(135deg, rgba(58,216,255,.08), rgba(168,255,62,.08)); clip-path: inset(0 0 0 50%); }
.map-label { position: absolute; top: 16px; left: 20px; font-weight: 950; text-transform: uppercase; letter-spacing: .12em; color: var(--muted); }
.after-map .map-label { left: auto; right: 20px; }
.flow-node { border: 1px solid var(--line); border-radius: 12px; padding: 12px 14px; background: rgba(255,255,255,.06); font-weight: 780; }
.flow-arrow { display: grid; place-items: center; color: var(--cyan); }
.comparison-divider { position: absolute; top: 0; bottom: 0; left: 50%; width: 3px; background: white; transform: translateX(-50%); box-shadow: 0 0 18px rgba(255,255,255,.6); }
.comparison-divider span { position: absolute; top: 50%; left: 50%; transform: translate(-50%,-50%); width: 42px; height: 42px; border-radius: 50%; display: grid; place-items: center; background: white; color: #07111f; font-weight: 950; }
.comparison-slider { width: 100%; margin-top: 18px; accent-color: var(--cyan); }

.selection-matrix { margin-top: 22px; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; }
.matrix-row { display: grid; grid-template-columns: minmax(200px, .9fr) 2fr 60px; gap: 14px; align-items: center; padding: 11px 0; border-bottom: 1px solid var(--line); }
.matrix-row:last-child { border-bottom: 0; }
.matrix-row > div { height: 12px; border-radius: 999px; background: rgba(255,255,255,.06); overflow: hidden; }
.matrix-row i { display: block; height: 100%; background: linear-gradient(90deg, var(--cyan), var(--lime)); border-radius: inherit; }
.matrix-row.not-selected i { background: linear-gradient(90deg, var(--orange), var(--red)); }

.control-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.control-card { min-height: 220px; }
.control-icon { width: 44px; height: 44px; display: grid; place-items: center; border-radius: 14px; color: #06111b; background: linear-gradient(135deg, var(--cyan), var(--lime)); font-weight: 950; }
.control-card h3 { margin: 38px 0 8px; }
.control-card p { color: var(--muted); margin: 0; }

.results-dashboard { display: grid; grid-template-columns: .9fr 1.1fr; gap: 50px; align-items: center; margin-top: 22px; padding: 34px; border-radius: var(--radius); border: 1px solid rgba(58,216,255,.25); background: linear-gradient(135deg, rgba(55,125,255,.14), rgba(58,216,255,.06)); }
.results-copy h3 { margin: 0; font-size: 2rem; }
.results-copy p { color: var(--muted); }
.result-row { margin-bottom: 22px; }
.result-row > div:first-child { display: flex; justify-content: space-between; gap: 15px; margin-bottom: 8px; }
.result-row span { color: var(--muted); }
.progress-track { height: 12px; border-radius: 999px; background: rgba(255,255,255,.08); overflow: hidden; }
.progress-track i { display: block; height: 100%; width: 0; border-radius: inherit; background: linear-gradient(90deg, var(--cyan), var(--lime)); transition: width 1.4s ease; }

.lessons { margin-top: 40px; }
.lesson-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 18px; }
.lesson-grid blockquote { margin: 0; min-height: 180px; padding: 24px; border-radius: 18px; border: 1px solid var(--line); background: rgba(255,255,255,.025); color: var(--muted); }

.cta-section { padding: 80px 0; background: linear-gradient(135deg, rgba(55,125,255,.28), rgba(58,216,255,.08)); border-block: 1px solid var(--line); }
.cta-grid { display: flex; justify-content: space-between; gap: 40px; align-items: center; }
.cta-grid p:last-child { color: var(--muted); }
.cta-actions { display: flex; gap: 12px; flex-wrap: wrap; justify-content: flex-end; }

.site-footer { padding: 35px 0; }
.footer-grid { display: flex; justify-content: space-between; gap: 30px; color: var(--muted); }
.footer-grid strong { color: var(--text); }
.footer-grid p { margin: 3px 0; }

.chart-tooltip {
  position: fixed; pointer-events: none; z-index: 500; opacity: 0; transform: translate(-50%, -120%);
  background: #07111f; border: 1px solid var(--line); border-radius: 10px; padding: 9px 11px;
  box-shadow: var(--shadow); font-size: .82rem; transition: opacity .12s ease;
}
.chart-tooltip.visible { opacity: 1; }

.reveal { opacity: 0; transform: translateY(24px); transition: opacity .8s ease, transform .8s ease; }
.reveal.visible { opacity: 1; transform: none; }

@media (max-width: 980px) {
  .site-nav {
    position: fixed; inset: 76px 0 0 0; background: rgba(7,17,31,.98); display: none;
    flex-direction: column; align-items: stretch; padding: 30px 22px;
  }
  .site-nav.open { display: flex; }
  .site-nav a { padding: 10px; font-size: 1.05rem; }
  .nav-toggle { display: block; }
  .hero-grid, .lead-time-card, .results-dashboard { grid-template-columns: 1fr; }
  .hero { min-height: auto; }
  .hero-panel { max-width: 620px; }
  .metrics-grid { grid-template-columns: repeat(2,1fr); }
  .metric-card:nth-child(2) { border-right: 0; }
  .metric-card:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .dmaic-roadmap { grid-template-columns: repeat(2,1fr); }
  .scope-grid, .measure-grid { grid-template-columns: 1fr; }
  .sipoc-grid { grid-template-columns: repeat(2,1fr); }
  .solution-grid, .control-grid { grid-template-columns: repeat(2,1fr); }
  .lesson-grid { grid-template-columns: 1fr; }
}

@media (max-width: 700px) {
  .container { width: min(calc(100% - 28px), var(--max)); }
  .section { padding: 78px 0; }
  .hero { padding-top: 120px; }
  .hero h1 { font-size: clamp(2.8rem, 14vw, 4.5rem); }
  .hero-meta, .two-column, .summary-content, .process-header { grid-template-columns: 1fr; }
  .hero-meta div { padding: 10px 0; }
  .metrics-grid { grid-template-columns: 1fr; }
  .metric-card { border-right: 0; border-bottom: 1px solid var(--line); }
  .metric-card:last-child { border-bottom: 0; }
  .dmaic-roadmap, .sipoc-grid, .solution-grid, .control-grid { grid-template-columns: 1fr; }
  .phase { min-height: 130px; }
  .process-description { text-align: left; }
  .chart-toolbar, .comparison-header, .cta-grid, .footer-grid { flex-direction: column; align-items: flex-start; }
  .segmented-control { width: 100%; justify-content: space-between; }
  .segmented-control button { flex: 1; }
  .fishbone { height: auto; display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
  .fishbone-spine, .fishbone-head, .bone::after { display: none; }
  .bone { position: static; min-width: 0; }
  .matrix-row { grid-template-columns: 1fr; }
  .comparison-stage { height: 520px; }
  .process-map { flex-direction: column; flex-wrap: nowrap; align-items: stretch; padding: 55px 22px 25px; }
  .flow-arrow { transform: rotate(90deg); }
  .cta-actions { justify-content: flex-start; }
}