/* KR Methodology Explainer · opened-tile component. Navy, champagne gold, ivory. */
.krm {
  --k-bg: #0B1626; --k-panel: #101F32; --k-edge: #21354C; --k-ink: #F6F2EA; --k-ink2: #C7CED8; --k-mute: #8C97A6;
  --k-gold: #C9A469; --k-hi: #E2C891; --k-faint: rgba(199,206,216,.22); --k-faint2: rgba(199,206,216,.10);
  --k-serif: 'Source Serif 4', Georgia, 'Times New Roman', serif;
  --k-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--k-panel); color: var(--k-ink); font-family: var(--k-sans); font-size: 15px; line-height: 1.55;
  display: grid; grid-template-columns: minmax(0, 1.65fr) minmax(0, 1fr); gap: 0; border: 1px solid var(--k-edge); border-radius: 6px; overflow: hidden;
  color-scheme: dark;
}
.krm * { box-sizing: border-box; }
@media (max-width: 900px) { .krm { grid-template-columns: minmax(0, 1fr); } }

/* left: stage */
.krm-stage { min-width: 0; background: var(--k-bg); display: grid; grid-template-rows: auto 1fr auto; }
.krm-dia-wrap { align-self: center; }
.krm-head { padding: 22px 26px 4px; display: grid; gap: 4px; }
.krm-eyebrow { margin: 0; font-size: 11px; letter-spacing: .22em; text-transform: uppercase; color: var(--k-gold); font-weight: 600; font-variant-numeric: tabular-nums; }
.krm-title { margin: 0; font-family: var(--k-serif); font-weight: 600; font-size: clamp(26px, 3.2vw, 36px); line-height: 1.05; text-wrap: balance; }
.krm-concept { margin: 0; font-family: var(--k-serif); font-style: italic; font-size: 20px; color: var(--k-hi); }
.krm-tag { margin: 4px 0 0; font-size: 11px; letter-spacing: .14em; text-transform: uppercase; color: var(--k-mute); font-weight: 600; }
.krm-note { font-size: 13.5px; color: var(--k-ink2) !important; font-style: italic; }
.krm-e.tap { cursor: pointer; outline: none; }
.krm-e.tap:focus-visible .halo { opacity: 1; stroke-width: 2.5; animation: none; }
.krm-e.tap:hover .ink { stroke: var(--k-hi); }
.krm-dia-wrap { position: relative; padding: 6px 10px 0; }
.krm-dia { display: block; width: 100%; height: auto; max-width: 100%; aspect-ratio: 16 / 9; overflow: visible; }
.krm-cap { padding: 12px 26px 20px; min-height: 124px; display: grid; gap: 6px; align-content: start; border-top: 1px solid var(--k-edge); }
.krm-cap-k { margin: 0; font-size: 11px; letter-spacing: .2em; text-transform: uppercase; color: var(--k-gold); font-weight: 600; font-variant-numeric: tabular-nums; }
.krm-cap-h { margin: 0; font-family: var(--k-serif); font-size: 24px; font-weight: 600; line-height: 1.1; }
.krm-cap-p { margin: 0; color: var(--k-ink2); max-width: 70ch; }
.krm-cap-p b { color: var(--k-ink); font-weight: 600; }

/* stepper */
.krm-steps { display: flex; align-items: center; gap: 8px; padding: 0 26px 18px; flex-wrap: wrap; }
.krm-steps ol { list-style: none; margin: 0; padding: 0; display: flex; gap: 6px; flex-wrap: wrap; }
.krm-step { width: 34px; height: 34px; border-radius: 50%; border: 1px solid var(--k-edge); background: transparent; color: var(--k-ink2);
  font: 600 13px/1 var(--k-sans); font-variant-numeric: tabular-nums; cursor: pointer; transition: background .3s, color .3s, border-color .3s; }
.krm-step[aria-current="step"] { background: var(--k-hi); color: #101F32; border-color: var(--k-hi); }
.krm-step.done { border-color: var(--k-gold); color: var(--k-hi); }
.krm-btn { font: 600 13px/1 var(--k-sans); color: var(--k-ink); background: transparent; border: 1px solid var(--k-edge); border-radius: 0; padding: 10px 16px; cursor: pointer; }
.krm-btn:hover { border-color: var(--k-gold); }
.krm-btn.primary { background: var(--k-hi); color: #101F32; border-color: var(--k-hi); }
.krm-steps .sp { flex: 1; }
.krm-step:focus-visible, .krm-btn:focus-visible, .krm-opt:focus-visible { outline: 2px solid var(--k-hi); outline-offset: 2px; }

/* right: side */
.krm-side { min-width: 0; padding: 24px 26px 26px; display: grid; gap: 22px; align-content: start; border-left: 1px solid var(--k-edge); }
@media (max-width: 900px) { .krm-side { border-left: 0; border-top: 1px solid var(--k-edge); } }
.krm-sec { display: grid; gap: 8px; }
.krm-sec h4 { margin: 0; font-size: 11px; letter-spacing: .22em; text-transform: uppercase; color: var(--k-gold); font-weight: 600; }
.krm-sec p { margin: 0; color: var(--k-ink2); }
.krm-thesis { font-family: var(--k-serif); font-size: 21px !important; line-height: 1.3; color: var(--k-ink) !important; }
.krm-q { color: var(--k-ink) !important; font-weight: 600; }
.krm-opts { display: grid; gap: 8px; }
.krm-opt { text-align: left; display: grid; grid-template-columns: 26px minmax(0, 1fr); gap: 10px; align-items: start; width: 100%;
  background: transparent; color: var(--k-ink); border: 1px solid var(--k-edge); border-radius: 4px; padding: 11px 12px; cursor: pointer; font: 500 14px/1.4 var(--k-sans); transition: border-color .3s, background .3s; }
.krm-opt:hover { border-color: var(--k-gold); }
.krm-opt .key { width: 24px; height: 24px; border-radius: 50%; border: 1px solid var(--k-gold); color: var(--k-hi); display: grid; place-items: center; font-weight: 600; font-size: 12px; }
.krm-opt small { display: block; color: var(--k-ink2); font-weight: 400; font-size: 13px; margin-top: 2px; }
.krm-opt[aria-pressed="true"] { border-color: var(--k-hi); background: rgba(226,200,145,.08); }
.krm-opt[aria-pressed="true"] .key { background: var(--k-hi); color: #101F32; }
.krm-limit { border-left: 2px solid var(--k-gold); padding-left: 12px; }
.krm-limit p + p { margin-top: 6px; }
.krm-runs { font-size: 13px; color: var(--k-mute) !important; }
.krm-runs b { color: var(--k-ink2); font-weight: 600; }

/* diagram elements */
.krm-dia text { font-family: var(--k-sans); }
.krm-e .base { stroke: var(--k-faint); stroke-width: 1.5; fill: none; }
.krm-e .ink { stroke: var(--k-gold); stroke-width: 2.25; fill: none; stroke-dasharray: 1 2; stroke-dashoffset: 1.02;
  transition: stroke-dashoffset 1.1s cubic-bezier(.45,0,.25,1), stroke .5s, stroke-width .5s; }
.krm-e.is-seen .ink { stroke-dashoffset: 0; }
.krm-e.is-now .ink { stroke: var(--k-hi); stroke-width: 3; }
.krm-e .fillink { fill: var(--k-gold); opacity: 0; transition: opacity .6s, fill .5s; }
.krm-e.is-seen .fillink { opacity: 1; }
.krm-e.is-now .fillink { fill: var(--k-hi); }
.krm-e .bg { fill: var(--k-bg); }
.krm-e .lbl { paint-order: stroke; stroke: var(--k-bg); stroke-width: 5px; stroke-linejoin: round; fill: var(--k-ink2); font-size: 15px; font-weight: 500; opacity: 0; transition: opacity .6s, fill .5s; }
.krm-e .lbl.sub { font-size: 12.5px; fill: var(--k-mute); letter-spacing: .02em; }
.krm-e.is-seen .lbl { opacity: .9; }
.krm-e.is-now .lbl { opacity: 1; fill: var(--k-hi); font-weight: 600; }
.krm-e.is-now .lbl.sub { fill: var(--k-ink2); font-weight: 500; }
.krm-e.always .lbl { opacity: .55; }
.krm-e .halo { fill: none; stroke: var(--k-hi); stroke-width: 1.5; opacity: 0; transform-box: fill-box; transform-origin: center; }
.krm-e.is-now .halo { animation: krm-halo 2.6s cubic-bezier(.2,.6,.3,1) infinite; }
@keyframes krm-halo { 0% { opacity: .9; transform: scale(1); } 70%, 100% { opacity: 0; transform: scale(2.4); } }
.krm-e .pulse { fill: var(--k-hi); opacity: 0; }
.krm-e.is-now .pulse { opacity: 1; }
.krm-e.is-dim { opacity: .28; transition: opacity .6s; }
.krm-e { transition: opacity .6s; }
.krm-e.is-off { opacity: 0; pointer-events: none; }
.krm-e .zone { stroke: var(--k-faint); stroke-dasharray: 3 5; fill: var(--k-faint2); }
.krm-e.is-seen .zone { stroke: rgba(201,164,105,.45); }
.krm-e .gate-a .ink, .krm-e .gate-b .ink { stroke-width: 3.5; }
.krm-e .gate-a, .krm-e .gate-b { transition: transform .9s cubic-bezier(.45,0,.25,1); }
.krm-e.is-seen .gate-a { transform: translateY(-9px); }
.krm-e.is-seen .gate-b { transform: translateY(9px); }
.krm-e .grow { transform-box: fill-box; transform-origin: 50% 100%; transform: scaleY(0); transition: transform 1s cubic-bezier(.45,0,.25,1); }
.krm-e.is-seen .grow { transform: scaleY(1); }
.krm-e .slide { transition: transform 1s cubic-bezier(.45,0,.25,1), opacity .8s; opacity: 0; }
.krm-e.is-seen .slide { transform: translate(0, 0) !important; opacity: 1; }
.krm-e .sweep { opacity: 0; }
.krm-e.is-now .sweep { animation: krm-sweep 4.5s linear infinite; }
@keyframes krm-sweep { 0% { opacity: 0; transform: translateX(0); } 8% { opacity: 1; } 85% { opacity: 1; } 100% { opacity: 0; transform: translateX(var(--sw, 600px)); } }
.krm.narrow .krm-e .lbl { display: none; }

@media (prefers-reduced-motion: reduce) {
  .krm * { transition: none !important; animation: none !important; }
  .krm-e .pulse { display: none; }
}

/* overlay */
.krm-ov { position: fixed; inset: 0; z-index: 50; background: rgba(5, 11, 20, .74); overflow-y: auto; overscroll-behavior: contain;
  padding: max(16px, env(safe-area-inset-top, 0px)) max(16px, env(safe-area-inset-right, 0px)) max(16px, env(safe-area-inset-bottom, 0px)) max(16px, env(safe-area-inset-left, 0px)); }
.krm-ov-box { position: relative; width: min(1180px, 100%); margin: 20px auto; }
.krm-ov-box .krm-head { padding-right: 64px; }
.krm-ov-x { position: absolute; top: 12px; right: 12px; z-index: 2; width: 40px; height: 40px; border-radius: 50%; border: 1px solid #2c4058;
  background: #101F32; color: #F6F2EA; font: 400 24px/1 "Source Serif 4",Georgia, serif; cursor: pointer; display: grid; place-items: center; }
.krm-ov-x:hover { border-color: #C9A469; }
.krm-ov-x:focus-visible { outline: 2px solid #E2C891; outline-offset: 2px; }
@media (max-width: 600px) { .krm-head { padding: 18px 18px 4px; } .krm-cap, .krm-side { padding-left: 18px; padding-right: 18px; } .krm-steps { padding: 0 18px 16px; } .krm-step { width: 30px; height: 30px; } }

/* ivory band: caption and stage controls, between the dark diagram and the dark side panel */
.krm-band { background: #FAF8F3; color: #101F32; border-top: 1px solid #E6DED0; }
.krm-band .krm-cap { border-top: 0; padding-top: 18px; }
.krm-band .krm-cap-k { color: #8C6A3C; }
.krm-band .krm-cap-h { color: #101F32; }
.krm-band .krm-cap-p { color: #4A5465; }
.krm-band .krm-cap-p b { color: #101F32; }
.krm-band .krm-step { border-color: #D8CDB9; color: #4A5465; background: #FFFFFF; }
.krm-band .krm-step.done { border-color: #B18A58; color: #8C6A3C; }
.krm-band .krm-step[aria-current="step"] { background: #101F32; border-color: #101F32; color: #F6F2EA; }
.krm-band .krm-btn { color: #101F32; border-color: #CFC3AE; background: transparent; }
.krm-band .krm-btn:hover { border-color: #8C6A3C; }
.krm-band .krm-btn.primary { background: #101F32; border-color: #101F32; color: #F6F2EA; }
.krm-band .krm-btn:disabled { opacity: .4; cursor: default; }
.krm-band .krm-step:focus-visible, .krm-band .krm-btn:focus-visible { outline-color: #8C6A3C; }
.krm-nav { display: flex; gap: 8px; }
.krm-chips { display: none; list-style: none; margin: 4px 0 0; padding: 0; flex-wrap: wrap; gap: 6px; }
.krm.narrow .krm-chips:not([hidden]) { display: flex; }
.krm-chips li { font-size: 14px; font-weight: 600; color: #101F32; background: #FFFFFF; border: 1px solid #D8CDB9; border-radius: 0; padding: 4px 10px 4px 9px; display: inline-flex; align-items: center; gap: 6px; }
.krm-chips li::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: #B18A58; }
@media (max-width: 600px) {
  .krm-steps ol { width: 100%; justify-content: space-between; }
  .krm-steps .sp { display: none; }
  .krm-nav { width: 100%; }
  .krm-nav .krm-btn { flex: 1; }
}

/* evidence boundary (case studies) */
.krm-bound ul { margin: 0; padding: 0; list-style: none; display: grid; gap: 6px; }
.krm-bound li { color: var(--k-ink2); padding-left: 18px; position: relative; font-size: 14px; }
.krm-bound li::before { content: ""; position: absolute; left: 2px; top: .62em; width: 8px; height: 8px; border-radius: 50%; background: var(--k-gold); }
.krm-bound ul.no li::before { background: transparent; border: 1px solid var(--k-mute); }
.krm-bk { margin: 6px 0 0 !important; font-size: 11px; letter-spacing: .16em; text-transform: uppercase; color: var(--k-ink) !important; font-weight: 600; }

.krm-foot { grid-column: 1 / -1; background: var(--k-panel); border-top: 1px solid var(--k-edge); padding: 20px 26px 24px; display: grid; gap: 12px; }
.krm-foot h4 { margin: 0; font-size: 11px; letter-spacing: .22em; text-transform: uppercase; color: var(--k-gold); font-weight: 600; }
.krm-foot-cols { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 10px 32px; }
.krm-foot .krm-bk { margin: 0 0 6px !important; }
@media (max-width: 700px) { .krm-foot-cols { grid-template-columns: minmax(0, 1fr); } .krm-foot { padding: 18px; } }