/* BRAND-02 refined: hero illustration, top-rail walkthrough, mobile stage strip.
   Loaded after sample.css (unchanged from r2). Semantic tokens only. */
.stage { margin: 28px 0 0; background: var(--stage); border: 1px solid var(--border); border-radius: var(--r-xl); overflow: hidden; }

/* top rail: context, steps and controls — visible before any motion */
.rail { display: grid; grid-template-columns: minmax(0, 1fr) auto auto; gap: 8px 20px; align-items: center; padding: 12px 16px 10px 20px; border-bottom: 1px solid var(--border); background: var(--surface); }
.rail-k { margin: 0; font-size: 13.5px; color: var(--text-2); display: flex; align-items: center; gap: 8px; }
.rail-k .short { display: none; }
.rail-k .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--status-warning-icon); flex: none; }
.beats { display: flex; gap: 2px; padding: 3px; border-radius: 999px; background: var(--surface-2); box-shadow: inset 0 0 0 1px var(--border); }
.beat { border: 0; background: none; border-radius: 999px; padding: 6px 12px 6px 7px; display: inline-flex; align-items: center; gap: 7px; font: 500 13.5px/1 var(--sans); color: var(--text-2); cursor: pointer; transition: background-color calc(160ms * var(--dur)) var(--ease), color calc(160ms * var(--dur)) var(--ease); }
.beat:hover { color: var(--text); }
.beat .bn { width: 20px; height: 20px; border-radius: 50%; display: grid; place-items: center; font: 500 11px/1 var(--mono); box-shadow: inset 0 0 0 1.5px var(--border-strong); color: var(--text-2); }
.beat.done .bn { background: var(--selected-bg); box-shadow: none; color: var(--selected-text); }
.beat[aria-pressed="true"] { background: var(--surface); color: var(--text); box-shadow: 0 0 0 1px var(--border-strong); }
.beat[aria-pressed="true"] .bn { background: var(--selected-indicator); color: #fff; box-shadow: none; }
.ctl { display: flex; gap: 8px; }
.ctl .btn { min-width: 92px; }
.cap { grid-column: 1 / -1; margin: 0; font-size: 14px; line-height: 1.45; color: var(--text-2); }
.cap:empty { display: none; }
.cap b { color: var(--text); font-weight: 600; }

/* scene: work → review → evidence → decision (one composition) */
.scene { display: grid; grid-template-columns: minmax(0, 4fr) minmax(0, 2.3fr) minmax(0, 5.7fr); align-items: center; padding: 44px 44px 40px; }
.kk { margin: 0 0 10px; font: 500 12px/1.3 var(--mono); letter-spacing: .06em; text-transform: uppercase; color: var(--text-muted); }
.s-work .msg { padding: 16px 18px; box-shadow: 0 12px 28px -20px rgba(18,23,34,.35); }
.s-work .msg p { font-size: 18px; line-height: 1.45; margin: 0; }
.right { margin: 12px 0 0; font-size: 14px; color: var(--text-2); display: flex; align-items: center; gap: 8px; }
.s-review { padding: 0 18px; text-align: center; }
.wire { display: block; position: relative; height: 2px; margin: 0 8px 0 0; background: var(--selected-indicator); border-radius: 1px; transform-origin: left; transition: transform calc(520ms * var(--dur)) var(--ease); }
.wire::after { content: ""; position: absolute; right: -2px; top: -5px; border: 6px solid transparent; border-left: 8px solid var(--selected-indicator); border-right: 0; }
.s-review p { margin: 12px 0 0; font-size: 13.5px; line-height: 1.45; color: var(--text-2); }
.s-review b { color: var(--text); font-weight: 600; }
.s-result { background: var(--surface); border: 1px solid var(--border); border-radius: 16px; overflow: hidden; box-shadow: 0 24px 48px -28px rgba(18,23,34,.35); }
.s-result > .kk { padding: 20px 24px 0; }
.vs { white-space: nowrap; text-transform: none; letter-spacing: 0; font-family: var(--sans); font-size: 13px; color: var(--text-muted); margin-left: 6px; }
.stats { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; padding: 6px 24px 0; align-items: end; }
.stat .lbl { display: block; font-size: 14px; color: var(--text-2); margin-bottom: 8px; }
.num { display: flex; align-items: baseline; gap: 8px; font-feature-settings: "tnum" 1; }
.num .from { font-size: 22px; color: var(--text-muted); }
.num .arr { font-size: 18px; color: var(--text-muted); }
.num .to { font-size: 54px; font-weight: 500; letter-spacing: -0.035em; line-height: 1; color: var(--text); }
.num .of { font-size: 16px; color: var(--text-2); }
.trade { display: flex; align-items: center; flex-wrap: wrap; gap: 6px; margin: 20px 24px 0; padding: 14px 0 18px; border-top: 1px solid var(--border); font-size: 14px; color: var(--text-2); }
.trade .w { color: var(--status-warning-icon); } .trade .u { color: var(--status-unknown-text); }
.sep { color: var(--text-muted); margin: 0 4px; }
.ti { display: inline-flex; align-items: center; gap: 6px; white-space: nowrap; }
.decision { display: grid; grid-template-columns: minmax(0, 1fr) auto; gap: 2px 12px; align-items: center; padding: 16px 24px 18px; background: var(--decision-bg); color: var(--decision-text); }
.dk { font: 500 11.5px/1.3 var(--mono); letter-spacing: .07em; text-transform: uppercase; color: var(--decision-muted); }
.dv { font: 500 24px/1.15 var(--sans); letter-spacing: -0.015em; grid-column: 1; }
.dn { grid-column: 2; grid-row: 1 / span 2; font-size: 13px; color: var(--decision-text); padding: 5px 10px; border-radius: 999px; box-shadow: inset 0 0 0 1px rgba(255,255,255,.35); white-space: nowrap; }
.prov { margin: 0; padding: 12px 20px 14px; border-top: 1px solid var(--border); font-size: 13.5px; color: var(--text-muted); background: var(--surface); }

/* step states. data-beat="0" is the full sample (first and final frame).
   Text is never dimmed: every phase keeps full-contrast text and caveats.
   Emphasis = outline/background on the active part; inactive parts only lose decorative shadow.
   The candidate value (v3) is revealed at step 3; before that only the real v1 value is shown. */
.s-work .msg, .s-result, .decision, .s-review { transition: box-shadow calc(320ms * var(--dur)) var(--ease), background-color calc(320ms * var(--dur)) var(--ease), transform calc(420ms * var(--dur)) var(--ease); }
.s-work { transition: transform calc(420ms * var(--dur)) var(--ease); }
.s-review { border-radius: 12px; }
/* inactive: decorative shadow off (surfaces only) */
.stage:not([data-beat="0"]) .s-work .msg, .stage:not([data-beat="0"]) .s-result { box-shadow: none; }
/* active emphasis */
.stage[data-beat="1"] .s-work { transform: translateY(-4px); }
.stage[data-beat="1"] .s-work .msg { box-shadow: 0 0 0 2px var(--stage), 0 0 0 4px var(--selected-indicator), 0 16px 30px -20px rgba(18,23,34,.45); }
.stage[data-beat="2"] .s-review { background: var(--surface); box-shadow: 0 0 0 1px var(--border); }
.stage[data-beat="3"] .s-result { box-shadow: 0 0 0 2px var(--stage), 0 0 0 4px var(--selected-indicator), 0 24px 48px -28px rgba(18,23,34,.35); }
.stage[data-beat="4"] .s-result { box-shadow: 0 24px 48px -28px rgba(18,23,34,.35); }
.stage[data-beat="4"] .decision { box-shadow: inset 6px 0 0 var(--decision-marker); }
/* purposeful motion kept: wire draws in step 2, v3 value slides in at step 3 */
.stage[data-beat="1"] .wire { transform: scaleX(0); }
.stage[data-beat="1"] .num .arr, .stage[data-beat="1"] .num .to,
.stage[data-beat="2"] .num .arr, .stage[data-beat="2"] .num .to { display: none; }   /* only the real v1 value shows; no gap */
.stage[data-beat="3"] .num .arr { animation: reveal calc(380ms * var(--dur)) var(--ease) calc(300ms * var(--dur)) both; }
.stage[data-beat="3"] .num .to { animation: reveal calc(380ms * var(--dur)) var(--ease) calc(500ms * var(--dur)) both; }
@keyframes reveal { from { opacity: 0; transform: translateX(-8px); } to { opacity: 1; transform: none; } }

/* mobile stage strip: compact selected label + row that reveals the selection */
.stage-now { display: none; margin: 0; padding: 12px 18px 0; font-size: 14px; color: var(--text-2); }
.stage-now span { font: 500 12px/1 var(--mono); text-transform: uppercase; letter-spacing: .05em; color: var(--text-muted); margin-right: 6px; }
.stage-now b { color: var(--selected-text); }
.stages { position: relative; }

@media (max-width: 960px) {
  .stage-now { display: block; }
  .rail { grid-template-columns: minmax(0, 1fr) auto; }
  .beats { grid-column: 1 / -1; grid-row: 2; justify-content: stretch; }
  .beat { flex: 1; justify-content: center; }
  .scene { grid-template-columns: minmax(0, 1fr); gap: 0; padding: 20px 16px 20px; }
  .s-review { display: grid; grid-template-columns: 26px 1fr; align-items: center; gap: 12px; text-align: left; padding: 14px 4px 14px 10px; }
  .s-review .wire { display: none; }
  .s-review::before { content: ""; width: 2px; height: 46px; background: var(--selected-indicator); margin-left: 12px; border-radius: 1px; }
  .s-review p { margin: 0; }
}
@media (max-width: 720px) {
  .rail { padding: 10px 12px; gap: 8px 10px; }
  .rail-k .long, .s-review .long, .s-work .kk { display: none; }
  .rail-k .short { display: inline; }
  .scene { padding-top: 16px; }
  .s-work .msg { padding: 12px 14px; }
  .right { margin-top: 8px; }
  .s-review { padding: 10px 4px 10px 10px; }
  .s-review::before { height: 30px; }
  .rail-k { font-size: 12.5px; }
  .ctl .btn { min-width: 0; padding: 0 12px; }
  .beat { padding: 6px 6px; gap: 5px; font-size: 12.5px; }
  .beat .bn { width: 18px; height: 18px; }
  .cap { font-size: 13.5px; }
  .s-work .msg p { font-size: 16px; }
  .stats { gap: 14px; padding: 6px 16px 0; }
  .s-result > .kk { padding: 16px 16px 0; }
  .vs { display: block; margin: 4px 0 0; }
  .num { gap: 5px; flex-wrap: wrap; }
  .num .to { font-size: 40px; }
  .num .from { font-size: 18px; }
  .trade { margin: 16px 16px 0; }
  .decision { padding: 14px 16px 16px; }
  .dv { font-size: 21px; }
  .prov { padding: 10px 12px 12px; }
}
@media (max-width: 360px) {
  .beat { font-size: 0; gap: 0; padding: 6px; }       /* 320px: numbered pills; full names stay in aria + caption */
  .beat .bn { font-size: 11px; }
  .stats { grid-template-columns: minmax(0, 1fr); }
}

/* polish: compact mobile so the two key numbers land inside 390x844 without shrinking body type */
@media (max-width: 720px) {
  .hero { padding-top: 22px; }
  h1 { margin-bottom: 10px; }
  .hero-top { gap: 16px; }
  .stage { margin-top: 20px; }
  .rail { padding: 8px 10px 8px 12px; gap: 6px 10px; }
  .scene { padding: 12px 12px 14px; }
  .s-work .msg { padding: 10px 12px; }
  .s-work .msg .who { margin-bottom: 2px; font-size: 12.5px; }
  .s-work .msg p { font-size: 16px; line-height: 1.4; }
  .right { margin-top: 6px; font-size: 13.5px; }
  .right .call { padding: 2px 8px; }
  .s-review { padding: 6px 4px 8px 10px; gap: 10px; }
  .s-review::before { height: 22px; }
  .s-review p { font-size: 13.5px; }
  .s-result > .kk { padding: 12px 14px 0; margin-bottom: 6px; }
  .vs { display: inline; margin-left: 4px; }
  .stats { padding: 0 14px; gap: 12px; }
  .stat .lbl { margin-bottom: 2px; }
  .trade { margin: 12px 14px 0; padding: 10px 0 12px; gap: 4px 14px; }
  .trade .sep { display: none; }
}