/* ============================================================
   CHARGE LOOKUP — case study page (NLU era)
   Class-based CSS. Fonts: Poppins + Mulish + Spline Sans Mono.
   Page-specific components: sticky-note research board, hybrid
   router trace, roadmap swimlane, DA-era green chat mocks.
   ============================================================ */

:root {
  --violet:  oklch(0.52 0.20 300);
  --ink:     oklch(0.20 0.02 300);
  --ink-2:   oklch(0.30 0.02 300);
  --body:    oklch(0.40 0.015 300);
  --muted:   oklch(0.50 0.02 300);
  --line:    oklch(0.92 0.008 300);
  --line-2:  oklch(0.90 0.010 300);
  --paper:   oklch(0.985 0.006 300);
  --tint:    oklch(0.97 0.02 300);
  --green:   oklch(0.50 0.12 150);
  --qbo:     oklch(0.52 0.14 145);   /* DA-era assistant green */
  --amber:   oklch(0.50 0.12 40);
  --sticky:  oklch(0.95 0.06 95);    /* sticky-note yellow */
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body { background: var(--paper); font-family: 'Mulish', system-ui, sans-serif; color: var(--ink-2); }
a { color: var(--violet); text-decoration: none; }
a:hover { text-decoration: underline; }
.mono { font-family: 'Spline Sans Mono', monospace; }

.wrap { max-width: 1180px; margin: 0 auto; padding-left: 40px; padding-right: 40px; }

/* nav */
.nav { position: sticky; top: 0; z-index: 30; background: color-mix(in oklab, var(--paper) 90%, transparent); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.nav__inner { display: flex; align-items: center; justify-content: space-between; padding: 20px 40px; }
.wordmark { font-family: 'Poppins', sans-serif; font-weight: 700; font-size: 20px; color: var(--violet); text-decoration: none; }
.nav__links { display: flex; gap: 34px; font-family: 'Spline Sans Mono', monospace; font-weight: 500; font-size: 12.5px; letter-spacing: 0.1em; color: var(--body); }
.nav__links a { color: inherit; text-decoration: none; transition: color .2s; }
.nav__links a:hover { color: var(--violet); text-decoration: none; }

/* hero */
.hero { padding: 64px 40px 40px; }
.kicker { font-family: 'Spline Sans Mono', monospace; font-size: 12.5px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--violet); margin-bottom: 22px; }
.hero h1 { font-family: 'Poppins', sans-serif; font-weight: 700; font-size: 60px; line-height: 1.03; letter-spacing: -0.025em; color: var(--ink); margin: 0 0 28px; max-width: 18ch; }
.hero h1 em { font-style: normal; color: var(--violet); }
.hero__lede { font-size: 21px; line-height: 1.5; color: var(--body); margin: 0; max-width: 60ch; }

/* verdict row */
.verdict { padding: 0 40px 64px; }
.verdict__grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line-2); border: 1px solid var(--line-2); border-radius: 14px; overflow: hidden; max-width: 1100px; margin: 0 auto; }
.verdict__cell { background: #fff; padding: 22px 22px 26px; }
.verdict__k, .eyebrow { font-family: 'Spline Sans Mono', monospace; font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--violet); margin-bottom: 10px; }
.verdict__cell p { font-size: 14.5px; line-height: 1.45; color: var(--ink-2); margin: 0; }

/* body layout — rail + content */
.body { padding: 0 40px 40px; display: grid; grid-template-columns: 190px 1fr; gap: 56px; align-items: start; }

/* rail */
.rail { position: sticky; top: 96px; display: flex; flex-direction: column; gap: 2px; }
.rail-link { display: flex; align-items: center; gap: 12px; padding: 9px 0; cursor: pointer; }
.rail-link__n { flex: none; width: 26px; height: 26px; border-radius: 50%; border: 1px solid oklch(0.86 0.015 300); display: flex; align-items: center; justify-content: center; font-family: 'Spline Sans Mono', monospace; font-size: 11px; color: oklch(0.5 0.05 300); transition: .2s; }
.rail-link__t { font-size: 13.5px; line-height: 1.3; color: var(--muted); transition: .2s; }
.rail-link.is-active .rail-link__n { background: var(--violet); color: #fff; border-color: var(--violet); }
.rail-link.is-active .rail-link__t { color: var(--ink); font-weight: 600; }
@media (max-width: 860px) { .body { grid-template-columns: 1fr; gap: 0; } .rail { display: none; } }

/* content + sections */
.content { min-width: 0; max-width: 760px; }
.section { scroll-margin-top: 96px; padding-bottom: 64px; }
.section + .section { border-top: 1px solid var(--line); padding-top: 48px; }
.section h2 { font-family: 'Poppins', sans-serif; font-weight: 700; font-size: 34px; line-height: 1.1; color: var(--ink); margin: 0 0 18px; }
.section p { font-size: 17px; line-height: 1.6; color: var(--body); margin: 0 0 28px; }
.section p.note { font-size: 15px; color: oklch(0.45 0.015 300); margin: 20px 0 0; }
.section strong { color: var(--ink-2); }

/* artifact frame */
.art { border: 1px solid var(--line-2); border-radius: 12px; overflow: hidden; background: #fff; }
.art__cap { padding: 12px 18px; border-bottom: 1px solid var(--line); display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; }
.art__cap .mono { font-size: 11px; letter-spacing: 0.04em; color: var(--muted); }
.art__foot { padding: 12px 18px; border-top: 1px solid var(--line); font-size: 13px; color: oklch(0.5 0.015 300); }
.tag { font-family: 'Spline Sans Mono', monospace; font-size: 10px; letter-spacing: 0.06em; text-transform: uppercase; padding: 3px 8px; border-radius: 100px; white-space: nowrap; }
.tag--neutral { color: var(--muted); background: oklch(0.94 0.01 300); }
.tag--green { color: var(--green); background: oklch(0.96 0.03 150); }

/* journey lane */
.lane { border: 1px solid var(--line-2); border-radius: 12px; overflow: hidden; background: #fff; display: grid; grid-template-columns: repeat(4, 1fr); }
@media (max-width: 720px) { .lane { grid-template-columns: 1fr 1fr; } }
.lane > div { padding: 18px 16px; border-left: 1px solid oklch(0.94 0.006 300); }
.lane b { display: block; font-family: 'Poppins', sans-serif; font-weight: 600; font-size: 14px; color: var(--ink); margin-bottom: 6px; }
.lane span { font-size: 12px; line-height: 1.45; color: var(--body); }
.lane .dead b { color: var(--amber); }

/* sticky-note research board */
.board { background: oklch(0.965 0.01 300); border: 1px solid var(--line-2); border-radius: 12px; padding: 22px; }
.board__title { font-family: 'Spline Sans Mono', monospace; font-size: 10.5px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--muted); margin-bottom: 16px; display: flex; justify-content: space-between; gap: 10px; flex-wrap: wrap; }
.stickies { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
@media (max-width: 560px) { .stickies { grid-template-columns: 1fr; } }
.sticky { background: var(--sticky); padding: 14px 15px; box-shadow: 0 2px 6px oklch(0.2 0.02 300 / 0.12); font-size: 12.5px; line-height: 1.5; color: oklch(0.32 0.03 95); }
.sticky b { display: block; font-family: 'Poppins', sans-serif; font-weight: 600; font-size: 13.5px; margin-bottom: 4px; color: oklch(0.25 0.03 95); }
.sticky:nth-child(1) { transform: rotate(-1.2deg); }
.sticky:nth-child(2) { transform: rotate(0.8deg); }
.sticky:nth-child(3) { transform: rotate(0.9deg); }
.sticky:nth-child(4) { transform: rotate(-0.7deg); }

/* question-type chips */
.chips { display: flex; gap: 10px; flex-wrap: wrap; }
.chips span { font-family: 'Spline Sans Mono', monospace; font-size: 12px; color: var(--violet); border: 1px solid oklch(0.85 0.05 300); background: #fff; padding: 7px 13px; border-radius: 100px; }

/* hybrid router trace */
.router { padding: 6px 0; }
.router__row { display: grid; grid-template-columns: 44px 1fr; gap: 14px; padding: 13px 18px; border-bottom: 1px solid oklch(0.95 0.006 300); align-items: baseline; }
.router__row:last-child { border-bottom: none; }
.router__n { font-family: 'Spline Sans Mono', monospace; font-size: 11px; color: oklch(0.62 0.12 300); }
.router__t { font-size: 14.5px; line-height: 1.5; color: var(--ink-2); }
.router__t code { font-family: 'Spline Sans Mono', monospace; font-size: 13px; color: var(--violet); }

/* roadmap swimlane */
.swim { border: 1px solid var(--line-2); border-radius: 12px; overflow: hidden; background: #fff; display: grid; grid-template-columns: repeat(4, 1fr); }
@media (max-width: 720px) { .swim { grid-template-columns: 1fr 1fr; } }
.swim > div { padding: 18px 16px; border-left: 1px solid oklch(0.94 0.006 300); }
.swim .ph { font-family: 'Spline Sans Mono', monospace; font-size: 10.5px; letter-spacing: 0.08em; text-transform: uppercase; color: var(--violet); display: block; margin-bottom: 8px; }
.swim b { display: block; font-family: 'Poppins', sans-serif; font-weight: 600; font-size: 14px; color: var(--ink); margin-bottom: 6px; }
.swim p { font-size: 12px !important; line-height: 1.45 !important; color: var(--body); margin: 0 !important; }
.swim .shipped { background: var(--tint); }

/* DA-era chat mock (green) */
.chat { padding: 20px; display: flex; flex-direction: column; gap: 14px; max-width: 560px; margin: 0 auto; }
.chat__user { align-self: flex-end; max-width: 82%; background: var(--qbo); color: #fff; padding: 11px 15px; border-radius: 14px 14px 4px 14px; font-size: 13.5px; line-height: 1.5; }
.chat__agent { align-self: flex-start; max-width: 92%; background: oklch(0.975 0.006 300); border: 1px solid var(--line); padding: 13px 16px; border-radius: 14px 14px 14px 4px; font-size: 13.5px; line-height: 1.55; color: var(--ink-2); }
.chat__agent p { font-size: 13.5px !important; line-height: 1.55 !important; margin: 0 0 10px !important; }
.chat__agent p:last-child { margin-bottom: 0 !important; }
.offer { border: 1px solid var(--line-2); border-radius: 10px; padding: 13px 14px; background: #fff; margin-top: 10px; }
.offer b { display: block; font-family: 'Poppins', sans-serif; font-weight: 600; font-size: 13.5px; color: var(--ink); margin-bottom: 4px; }
.offer p { font-size: 12.5px !important; color: var(--body) !important; margin: 0 0 10px !important; }
.offer__btns { display: flex; gap: 8px; flex-wrap: wrap; }
.offer__btns span { font-family: 'Spline Sans Mono', monospace; font-size: 11.5px; padding: 6px 12px; border-radius: 100px; }
.offer__btns .pri { background: var(--qbo); color: #fff; }
.offer__btns .gho { border: 1px solid var(--line-2); color: var(--muted); }

/* target-state prototype (static run) */
.work { border: 1px solid var(--line-2); border-radius: 10px; background: #fff; padding: 12px 14px; margin-bottom: 10px; }
.work__lab { font-family: 'Spline Sans Mono', monospace; font-size: 10px; letter-spacing: 0.06em; text-transform: uppercase; color: oklch(0.55 0.05 300); margin-bottom: 8px; }
.work__step { display: flex; gap: 9px; align-items: baseline; font-size: 12px; line-height: 1.55; color: var(--body); }
.work__step::before { content: ""; flex: none; width: 6px; height: 6px; border-radius: 50%; background: var(--green); position: relative; top: -1px; }
.work__step .res { color: var(--muted); }
.rows { border: 1px solid var(--line); border-radius: 10px; overflow: hidden; background: #fff; margin: 10px 0; }
.row { display: flex; justify-content: space-between; gap: 10px; padding: 9px 13px; border-bottom: 1px solid oklch(0.95 0.006 300); font-size: 12.5px; color: var(--ink-2); }
.row:last-child { border-bottom: none; }
.row .sub { display: block; font-size: 11px; color: var(--muted); }
.row .amt { font-family: 'Spline Sans Mono', monospace; white-space: nowrap; }
.row--total { background: var(--tint); font-weight: 700; }
.row--delta .amt { color: var(--green); }

/* landing + settled */
.landing { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; background: var(--line-2); border: 1px solid var(--line-2); border-radius: 14px; overflow: hidden; }
@media (max-width: 620px){ .landing { grid-template-columns: 1fr; } }
.landing__cell { background: #fff; padding: 22px; }
.landing__cell .verdict__k { margin-bottom: 10px; }
.landing__cell p { font-size: 14.5px; line-height: 1.5; color: var(--ink-2); margin: 0; }
.landing__v { font-family: 'Poppins', sans-serif; font-weight: 700; font-size: 26px; line-height: 1; color: var(--violet); margin-bottom: 8px; }
.settled { margin-top: 28px; padding: 22px 24px; background: var(--tint); border-radius: 12px; }
.settled p { font-size: 16px; line-height: 1.55; color: var(--ink-2); margin: 0; }

/* footer */
.footer { border-top: 1px solid var(--line); background: oklch(0.98 0.006 300); }
.footer__inner { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px; padding: 32px 40px; font-family: 'Spline Sans Mono', monospace; font-size: 12px; letter-spacing: 0.04em; color: var(--muted); }
.footer__inner a { color: inherit; text-decoration: none; }
.footer__inner a:hover { color: var(--violet); }