/* Casals philosophy slides — adapted from Casals/docs/philosophy for the landing page. */
:root {
      --gray-50: #fafafa;
      --gray-100: #f0f0f0;
      --gray-200: #e5e5e5;
      --gray-300: #d4d4d4;
      --gray-400: #a3a3a3;
      --gray-500: #737373;
      --gray-600: #525252;
      --gray-700: #404040;
      --gray-800: #262626;
      --gray-900: #171717;
      --text: var(--gray-900);
      --muted: var(--gray-600);
      --border: var(--gray-200);
      --panel: #ffffff;
    }

    /* Full-viewport stacked slides (landing page, not overlay deck) */
    .slide {
      min-height: 100vh;
      min-height: 100dvh;
      height: 100vh;
      height: 100dvh;
      padding: 1.25rem 2.5rem 1rem;
      display: flex;
      align-items: center;
      justify-content: center;
      background: var(--panel);
      scroll-snap-align: start;
      scroll-snap-stop: always;
      box-sizing: border-box;
    }

    .slide-arrows {
      position: fixed;
      inset: 0;
      z-index: 20;
      pointer-events: none;
      opacity: 0;
      visibility: hidden;
      transition: opacity 0.25s ease, visibility 0.25s;
    }

    .slide-arrows.is-on {
      opacity: 1;
      visibility: visible;
    }

    .slide-arrow {
      pointer-events: auto;
      position: absolute;
      top: 50%;
      transform: translateY(-50%);
      width: 2.6rem;
      height: 2.6rem;
      border: 1px solid var(--gray-300);
      border-radius: 999px;
      background: rgba(255, 255, 255, 0.92);
      color: var(--gray-800);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      padding: 0;
      box-shadow: 0 1px 2px rgba(0, 0, 0, 0.06);
    }

    .slide-arrow:hover,
    .slide-arrow:focus-visible {
      border-color: var(--gray-800);
      outline: none;
    }

    .slide-arrow:disabled {
      opacity: 0.28;
      cursor: default;
    }

    .slide-arrow.prev { left: 1rem; }
    .slide-arrow.next { right: 1rem; }

    .slide-arrow svg {
      width: 1.15rem;
      height: 1.15rem;
      display: block;
    }

    @media (max-width: 900px) {
      .slide-arrows {
        top: auto;
        bottom: 1rem;
        inset: auto 0 1rem;
        height: auto;
        display: flex;
        justify-content: center;
        gap: 1.25rem;
      }

      .slide-arrow {
        position: static;
        transform: none;
      }
    }











    .arch-box {
      width: 100%;
      height: 100%;
      border: 2px solid var(--gray-800);
      border-radius: 8px;
      padding: 2rem 2.2rem;
      display: flex;
      flex-direction: column;
      gap: 1.25rem;
    }

    .box-header {
      border-bottom: 2px solid var(--gray-900);
      padding-bottom: 0.75rem;
      flex-shrink: 0;
    }

    .box-header h2 {
      font-size: 2rem;
      font-weight: 700;
      letter-spacing: -0.02em;
    }

    .box-header p {
      font-size: 0.95rem;
      color: var(--muted);
      margin-top: 0.25rem;
    }

    .box-body {
      flex: 1;
      display: flex;
      align-items: center;
    }

    .box-body ul {
      list-style: none;
      font-size: 1.05rem;
      line-height: 1.7;
      color: var(--gray-700);
      width: 100%;
    }

    .box-body li { padding-left: 1rem; position: relative; margin-bottom: 0.2rem; }
    .box-body li strong { color: var(--text); font-weight: 650; }
    .box-body li em { color: var(--gray-500); font-style: normal; font-size: 0.9em; }
    .box-body code {
      font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
      font-size: 0.92em;
      background: var(--gray-100);
      padding: 0.08em 0.32em;
      border-radius: 3px;
    }





    .arch-box.casals-box-slide {
      position: relative;
      width: min(64rem, 58%);
      height: auto;
      flex: none;
      padding: 2.7rem 3rem;
      gap: 1.8rem;
    }

    .slide:has(.casals-box-slide):not(:has(.title-slide)):not(:has(.section-divider-slide)):not(:has(.wide-slide)) {
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .arch-box.casals-box-slide .box-body ul.bullets-hollow > li {
      padding-left: 2rem;
      margin-bottom: 0.65rem;
    }

    .arch-box.casals-box-slide .box-body ul.bullets-hollow > li::before {
      content: "";
      position: absolute;
      left: 0.35rem;
      top: 0.68em;
      width: 0.45rem;
      height: 0.45rem;
      border: 1.5px solid var(--gray-600);
      border-radius: 50%;
      background: transparent;
    }

    /* Title */
    .arch-box.title-slide {
      width: min(92%, 48rem);
      height: auto;
      padding: 3rem 2.75rem;
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
      gap: 0;
    }

    .slide:has(.title-slide) {
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .title-slide .title-main {
      font-size: 2.75rem;
      font-weight: 700;
      letter-spacing: -0.02em;
      line-height: 1.15;
      margin-bottom: 0.55rem;
    }

    .title-slide .title-sub {
      font-size: 1.2rem;
      color: var(--gray-500);
      line-height: 1.5;
      max-width: 38rem;
      margin: 0.25rem 0 0;
    }

    .title-slide .title-sub strong { color: var(--gray-800); font-weight: 650; }

    .num-badge {
      flex-shrink: 0;
      width: 1.45rem;
      height: 1.45rem;
      border-radius: 50%;
      border: 1.5px solid var(--gray-500);
      font-size: 0.72rem;
      font-weight: 700;
      color: var(--gray-700);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      transform: translateY(0.18rem);
      background: #fff;
    }

    /* Section divider */
    .arch-box.section-divider-slide {
      width: min(92%, 46rem);
      height: auto;
      padding: 3rem 2.75rem;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      text-align: center;
    }

    .slide:has(.section-divider-slide) {
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .section-divider-slide .box-header { border-bottom: none; padding-bottom: 0; }

    .section-divider-slide .box-header h2 {
      font-size: 2.75rem;
      font-weight: 700;
      letter-spacing: -0.02em;
    }

    .section-divider-slide .box-header p {
      margin-top: 0.55rem;
      font-size: 1.15rem;
      color: var(--gray-500);
    }

    .arch-box.wide-slide {
      width: min(78rem, 94%);
      flex: 1 1 auto;
      min-height: 0;
      max-height: 100%;
    }

    .slide:has(.rationale-slide),
    .slide:has(.authority-slide) {
      display: flex;
      align-items: stretch;
      justify-content: center;
    }

    .arch-box.rationale-slide,
    .arch-box.authority-slide {
      width: 100%;
      height: 100%;
      padding: 1.25rem 1.6rem 1.1rem;
      gap: 0.7rem;
    }

    .arch-box.rationale-slide .box-header,
    .arch-box.authority-slide .box-header {
      padding-bottom: 0.55rem;
    }

    .arch-box.rationale-slide .box-header h2,
    .arch-box.authority-slide .box-header h2 {
      font-size: 1.55rem;
    }

    /* Progress rail */
    .step-rail {
      position: relative;
      display: flex;
      align-items: flex-start;
      margin-top: 0.7rem;
      padding: 0 0.5rem;
    }

    .step-rail::before {
      content: "";
      position: absolute;
      left: calc(100% / 16);
      right: calc(100% / 16);
      top: 0.78rem;
      height: 1px;
      background: var(--gray-300);
    }

    .rail-step {
      flex: 1;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 0.28rem;
      position: relative;
    }

    .rail-num {
      width: 1.6rem;
      height: 1.6rem;
      border-radius: 50%;
      border: 1.5px solid var(--gray-400);
      background: #fff;
      color: var(--gray-500);
      font-size: 0.72rem;
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: center;
      transition: background 0.3s, color 0.3s, border-color 0.3s;
    }

    .rail-label {
      font-size: 0.6rem;
      font-weight: 650;
      letter-spacing: 0.06em;
      text-transform: uppercase;
      color: var(--gray-400);
      text-align: center;
      line-height: 1.2;
      transition: color 0.3s;
    }

    .rail-step.is-done .rail-num {
      background: var(--gray-200);
      border-color: var(--gray-400);
      color: var(--gray-700);
    }

    .rail-step.is-current .rail-num {
      background: var(--gray-900);
      border-color: var(--gray-900);
      color: #fff;
    }

    .rail-step.is-current .rail-label { color: var(--gray-900); font-weight: 700; }

    /* Split body: diagram left, explanation right */
    .rationale-split {
      flex: 1;
      min-height: 0;
      display: grid;
      grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
      gap: 1.25rem;
    }

    .rationale {
      min-height: 0;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 0.45rem;
      padding: 0.5rem 0;
    }

    .step-panel {
      min-height: 0;
      border-left: 1px solid var(--gray-200);
      padding: 0.35rem 0 0.35rem 1.4rem;
      display: flex;
      flex-direction: column;
      justify-content: center;
    }

    .step-detail {
      display: none;
      flex-direction: column;
      gap: 0.75rem;
    }

    .step-kicker {
      font-size: 0.72rem;
      font-weight: 700;
      letter-spacing: 0.12em;
      text-transform: uppercase;
      color: var(--gray-500);
    }

    .step-kicker .step-big {
      display: block;
      font-size: 2.6rem;
      font-weight: 700;
      letter-spacing: -0.03em;
      line-height: 1;
      color: var(--gray-300);
      margin-bottom: 0.3rem;
    }

    .step-title {
      font-size: 1.45rem;
      font-weight: 700;
      letter-spacing: -0.01em;
      line-height: 1.25;
      color: var(--gray-900);
    }

    .step-points {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 0.5rem;
    }

    .step-points li {
      position: relative;
      padding-left: 1.35rem;
      font-size: 0.98rem;
      line-height: 1.5;
      color: var(--gray-700);
    }

    .step-points li::before {
      content: "";
      position: absolute;
      left: 0.1rem;
      top: 0.55em;
      width: 0.45rem;
      height: 0.45rem;
      border: 1.5px solid var(--gray-600);
      border-radius: 50%;
    }

    .step-points strong { color: var(--gray-900); font-weight: 650; }

    .step-therefore {
      border-top: 1px solid var(--gray-300);
      padding-top: 0.65rem;
      display: flex;
      flex-direction: column;
      gap: 0.25rem;
    }

    .step-therefore-label {
      font-size: 0.64rem;
      font-weight: 700;
      letter-spacing: 0.12em;
      text-transform: uppercase;
      color: var(--gray-500);
    }

    .step-therefore-text {
      font-size: 1.02rem;
      font-weight: 650;
      color: var(--gray-900);
      line-height: 1.4;
    }

    /* Diagram pieces — hidden until their phase */
    .choice-row,
    .multisig-pill,
    .casals-row,
    .arrow-down,
    .axis-x,
    .axis-y,
    .sec-label,
    .stand-label,
    .can.extra,
    .can.baton,
    .section[data-sec="users"],
    .stand[data-stand="shared"],
    .can.more-can,
    .commanders,
    .orch-label,
    .ms-note,
    .approver,
    .shared-note {
      display: none;
    }

    .rationale-slide[data-phase] .stand-label.app-label { display: none; }

    .shared-note {
      font-weight: 600;
      color: var(--gray-500);
      font-size: 0.64rem;
    }

    .choice-row { gap: 0.75rem; align-items: stretch; }

    .choice {
      border: 1.5px solid var(--gray-400);
      border-radius: 6px;
      padding: 0.55rem 1.1rem;
      min-width: 11rem;
      text-align: center;
      background: #fff;
    }

    .choice-name { font-size: 0.92rem; font-weight: 700; color: var(--gray-800); }

    .choice-note {
      margin-top: 0.2rem;
      font-size: 0.68rem;
      font-weight: 600;
      color: var(--gray-500);
      line-height: 1.3;
    }

    .choice.faded { opacity: 0.4; border-style: dashed; }
    .choice.pick { border-color: var(--gray-900); background: var(--gray-100); }

    .multisig-pill {
      border: 1.5px solid var(--gray-700);
      border-radius: 999px;
      padding: 0.45rem 1.25rem;
      font-size: 0.95rem;
      font-weight: 650;
      background: var(--gray-100);
      text-align: center;
      min-width: 13rem;
    }

    .ms-note {
      font-size: 0.68rem;
      font-weight: 600;
      color: var(--gray-500);
      margin-top: 0.1rem;
    }

    .arrow-down {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--gray-800);
      line-height: 1;
      user-select: none;
    }

    .arrow-label {
      display: block;
      font-size: 0.58rem;
      font-weight: 700;
      letter-spacing: 0.06em;
      text-transform: uppercase;
      color: var(--gray-500);
      margin-top: 0.15rem;
    }

    .casals-row { align-items: center; gap: 0.65rem; }

    .casals-box {
      border: 1.5px solid var(--gray-800);
      border-radius: 6px;
      padding: 0.45rem 0.95rem;
      background: #fff;
      text-align: center;
    }

    .casals-box-name { font-size: 0.95rem; font-weight: 700; }

    .casals-box-note {
      font-size: 0.62rem;
      font-weight: 600;
      color: var(--gray-500);
      margin-top: 0.08rem;
    }

    .commanders { flex-direction: column; align-items: center; gap: 0.2rem; }

    .commanders-label {
      font-size: 0.58rem;
      font-weight: 700;
      letter-spacing: 0.05em;
      text-transform: uppercase;
      color: var(--gray-500);
    }

    .commanders-dots { display: flex; gap: 0.28rem; }

    .commander {
      width: 0.78rem;
      height: 0.78rem;
      border-radius: 50%;
      border: 1.5px solid var(--gray-700);
    }

    .commander.c1 { background: var(--gray-800); }
    .commander.c2 { background: var(--gray-500); }
    .commander.c3 { background: var(--gray-200); }

    .orchestra {
      width: auto;
      max-width: 100%;
      border: 1.5px dashed transparent;
      border-radius: 6px;
      padding: 0.15rem;
      display: flex;
      flex-direction: column;
      align-items: stretch;
      gap: 0.55rem;
      background: transparent;
    }

    .orch-label {
      font-size: 0.68rem;
      font-weight: 700;
      letter-spacing: 0.06em;
      text-transform: uppercase;
      color: var(--gray-600);
      text-align: center;
    }

    .sections {
      display: flex;
      gap: 0.7rem;
      align-items: flex-start;
      justify-content: center;
    }

    .section {
      border: 1.5px solid transparent;
      border-radius: 6px;
      padding: 0.15rem;
      display: flex;
      flex-direction: column;
      gap: 0.35rem;
    }

    .sec-label {
      font-size: 0.74rem;
      font-weight: 700;
      letter-spacing: 0.06em;
      text-transform: uppercase;
      color: var(--gray-600);
      padding-bottom: 0.2rem;
      border-bottom: 1px solid var(--gray-200);
    }

    .stand {
      border: 1px solid var(--gray-300);
      border-radius: 4px;
      padding: 0.4rem 0.5rem;
      background: #fff;
    }

    .stand-label {
      font-size: 0.8rem;
      font-weight: 650;
      color: var(--text);
      margin-bottom: 0.18rem;
    }

    .approver {
      font-weight: 600;
      color: var(--gray-500);
      font-size: 0.64rem;
    }

    .cans { display: flex; flex-wrap: wrap; gap: 0.22rem; }

    .can {
      font-size: 0.76rem;
      font-weight: 600;
      color: var(--gray-700);
      border: 1px solid var(--gray-300);
      border-radius: 999px;
      padding: 0.18rem 0.5rem;
      background: var(--gray-50);
      line-height: 1.2;
    }

    .can.baton {
      border-color: var(--gray-900);
      border-width: 1.5px;
      background: #fff;
      font-weight: 700;
      color: var(--text);
    }

    .axis-x, .axis-y {
      font-size: 0.62rem;
      font-weight: 700;
      letter-spacing: 0.06em;
      text-transform: uppercase;
      color: var(--gray-500);
    }

    .axis-x { text-align: center; }
    .axis-y { writing-mode: vertical-rl; transform: rotate(180deg); align-self: center; }

    .grow-wrap {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 0.45rem;
      max-width: 100%;
    }

    /* Phases 1–3 (app, control, grow-x): a single application, boxed with a dashed frame */
    .rationale-slide[data-phase="app"] .stand[data-stand="app"],
    .rationale-slide[data-phase="control"] .stand[data-stand="app"],
    .rationale-slide[data-phase="grow-x"] .stand[data-stand="app"] {
      border: 1.5px dashed var(--gray-400);
      background: transparent;
      padding: 0.55rem 0.8rem 0.65rem;
    }
    .rationale-slide[data-phase="app"] .stand-label.app-label,
    .rationale-slide[data-phase="control"] .stand-label.app-label,
    .rationale-slide[data-phase="grow-x"] .stand-label.app-label {
      display: block;
      text-align: center;
      font-size: 0.66rem;
      font-weight: 700;
      letter-spacing: 0.06em;
      text-transform: uppercase;
      color: var(--gray-500);
      margin-bottom: 0.35rem;
    }
    .rationale-slide[data-phase="app"] .can { border-color: var(--gray-800); }

    /* Phase 2 — control: SNS vs multisig */
    .rationale-slide[data-phase="control"] .choice-row { display: flex; }
    .rationale-slide[data-phase="control"] .arrow-down.choice-arrow { display: block; }

    /* Phase 3 — grow-x: multisig pill appears, app gains canisters */
    .rationale-slide[data-phase="grow-x"] .multisig-pill { display: block; }
    .rationale-slide[data-phase="grow-x"] .arrow-down.ms-arrow { display: block; }
    .rationale-slide[data-phase="grow-x"] .can.extra { display: inline-block; border-color: var(--gray-800); }
    .rationale-slide[data-phase="grow-x"] .axis-x { display: block; }
    .rationale-slide[data-phase="grow-x"] .stand[data-stand="app"] { border-color: var(--gray-900); }

    /* Phase 4 — grow-y: only user instances, no shared canisters yet */
    .rationale-slide[data-phase="grow-y"] .multisig-pill { display: block; }
    .rationale-slide[data-phase="grow-y"] .arrow-down.ms-arrow { display: block; }
    .rationale-slide[data-phase="grow-y"] .section[data-sec="infra"] { display: none; }
    .rationale-slide[data-phase="grow-y"] .section[data-sec="users"] { display: flex; }
    .rationale-slide[data-phase="grow-y"] .can.more-can { display: inline-block; }
    .rationale-slide[data-phase="grow-y"] .axis-x,
    .rationale-slide[data-phase="grow-y"] .axis-y { display: block; }
    .rationale-slide[data-phase="grow-y"] .stand-label { display: block; color: var(--gray-500); font-weight: 600; }
    .rationale-slide[data-phase="grow-y"] .section[data-sec="users"] .stand:not([data-stand="more"]) { border-color: var(--gray-900); }

    /* Phases 5–7: shared infrastructure beside the users; the single-app stand is gone */
    .rationale-slide[data-phase="shared"] .multisig-pill,
    .rationale-slide[data-phase="conductor"] .multisig-pill,
    .rationale-slide[data-phase="services"] .multisig-pill { display: block; }
    .rationale-slide[data-phase="baton"] .multisig-pill { display: block; }
    .rationale-slide[data-phase="shared"] .arrow-down.ms-arrow,
    .rationale-slide[data-phase="conductor"] .arrow-down.ms-arrow,
    .rationale-slide[data-phase="services"] .arrow-down.ms-arrow { display: block; }
    .rationale-slide[data-phase="baton"] .arrow-down.ms-arrow { display: block; }
    .rationale-slide[data-phase="shared"] .section[data-sec="users"],
    .rationale-slide[data-phase="conductor"] .section[data-sec="users"],
    .rationale-slide[data-phase="services"] .section[data-sec="users"] { display: flex; }
    .rationale-slide[data-phase="baton"] .section[data-sec="users"] { display: flex; }
    .rationale-slide[data-phase="shared"] .stand[data-stand="app"],
    .rationale-slide[data-phase="conductor"] .stand[data-stand="app"],
    .rationale-slide[data-phase="services"] .stand[data-stand="app"] { display: none; }
    .rationale-slide[data-phase="baton"] .stand[data-stand="app"] { display: none; }
    .rationale-slide[data-phase="shared"] .stand[data-stand="shared"],
    .rationale-slide[data-phase="conductor"] .stand[data-stand="shared"],
    .rationale-slide[data-phase="services"] .stand[data-stand="shared"] { display: block; }
    .rationale-slide[data-phase="baton"] .stand[data-stand="shared"] { display: block; }
    .rationale-slide[data-phase="shared"] .can.more-can,
    .rationale-slide[data-phase="conductor"] .can.more-can,
    .rationale-slide[data-phase="services"] .can.more-can { display: inline-block; }
    .rationale-slide[data-phase="baton"] .can.more-can { display: inline-block; }
    .rationale-slide[data-phase="shared"] .stand-label,
    .rationale-slide[data-phase="conductor"] .stand-label,
    .rationale-slide[data-phase="services"] .stand-label { display: block; }
    .rationale-slide[data-phase="baton"] .stand-label { display: block; }
    .rationale-slide[data-phase="shared"] .sections,
    .rationale-slide[data-phase="conductor"] .sections,
    .rationale-slide[data-phase="services"] .sections { align-items: stretch; }
    .rationale-slide[data-phase="baton"] .sections { align-items: stretch; }
    .rationale-slide[data-phase="shared"] .section { min-width: 12.5rem; }

    /* Phase 5 — shared: the new thing is the shared stand */
    .rationale-slide[data-phase="shared"] .stand[data-stand="shared"] { border-color: var(--gray-900); }
    .rationale-slide[data-phase="shared"] .shared-note { display: inline; }
    .rationale-slide[data-phase="shared"] .axis-x,
    .rationale-slide[data-phase="shared"] .axis-y { display: block; }

    /* Phases 6–7: framed orchestra with section labels */
    .rationale-slide[data-phase="conductor"] .sec-label,
    .rationale-slide[data-phase="conductor"] .orch-label,
    .rationale-slide[data-phase="services"] .sec-label,
    .rationale-slide[data-phase="baton"] .sec-label,
    .rationale-slide[data-phase="services"] .orch-label { display: block; }
    .rationale-slide[data-phase="baton"] .orch-label { display: block; }
    .rationale-slide[data-phase="conductor"] .section,
    .rationale-slide[data-phase="services"] .section,
    .rationale-slide[data-phase="baton"] .section {
      border-color: var(--gray-700);
      padding: 0.5rem 0.6rem;
      min-width: 12.5rem;
    }
    .rationale-slide[data-phase="conductor"] .orchestra,
    .rationale-slide[data-phase="services"] .orchestra,
    .rationale-slide[data-phase="baton"] .orchestra {
      border-color: var(--gray-400);
      background: var(--gray-50);
      padding: 0.65rem 0.75rem;
      min-width: 30rem;
    }

    
    /* Phase 6 — conductor: frame, labels and casals-backend appear together */
    .rationale-slide[data-phase="conductor"] .arrow-down.ca-arrow,
    .rationale-slide[data-phase="services"] .arrow-down.ca-arrow { display: block; }
    .rationale-slide[data-phase="baton"] .arrow-down.ca-arrow { display: block; }
    .rationale-slide[data-phase="conductor"] .casals-row,
    .rationale-slide[data-phase="conductor"] .commanders,
    .rationale-slide[data-phase="services"] .casals-row,
    .rationale-slide[data-phase="baton"] .casals-row,
    .rationale-slide[data-phase="services"] .commanders { display: flex; }
    .rationale-slide[data-phase="baton"] .commanders { display: flex; }
    .rationale-slide[data-phase="conductor"] .casals-box { border-width: 2px; border-color: var(--gray-900); }
    .casals-box.casals-fe { border-style: dashed; border-color: var(--gray-500); background: var(--gray-50); }
    .rationale-slide[data-phase="conductor"] .casals-box.casals-fe { border-color: var(--gray-700); }
    .rationale-slide[data-phase="conductor"] .arrow-label { display: block; }

    /* Phase 7 — baton */
    .rationale-slide[data-phase="services"] .can.baton { display: inline-block; }
    .rationale-slide[data-phase="baton"] .can.baton { display: inline-block; }
    .rationale-slide[data-phase="services"] .approver { display: inline; }
    .rationale-slide[data-phase="baton"] .approver { display: inline; }
    .rationale-slide[data-phase="baton"] .stand[data-stand="u1"],
    .rationale-slide[data-phase="baton"] .stand[data-stand="u2"] { border-color: var(--gray-900); }

    /* Phase 8 — services: WASM registry and cycles treasury */
    .casals-box.casals-wasms, .cycles-tag { display: none; }
    .rationale-slide[data-phase="services"] .casals-box.casals-wasms { display: block; border-width: 2px; border-color: var(--gray-900); }
    .rationale-slide[data-phase="services"] .casals-row { gap: 0.5rem; }
    .rationale-slide[data-phase="services"] .casals-box { padding: 0.4rem 0.7rem; }
    .rationale-slide[data-phase="services"] .casals-box-name { font-size: 0.86rem; white-space: nowrap; }
    .rationale-slide[data-phase="services"] .casals-box-note { font-size: 0.56rem; white-space: nowrap; }
    .rationale-slide[data-phase="services"] .commanders-label { white-space: nowrap; }
    .rationale-slide[data-phase="services"] .casals-box.casals-fe .casals-box-note { display: none; }
    .rationale-slide[data-phase="services"] .cycles-tag { display: inline-block; }
    .cycles-tag {
      margin-top: 0.3rem;
      font-size: 0.6rem;
      font-weight: 700;
      letter-spacing: 0.05em;
      text-transform: uppercase;
      color: var(--gray-900);
      border: 1.5px solid var(--gray-900);
      border-radius: 999px;
      padding: 0.1rem 0.5rem;
    }
    .rationale-slide[data-phase="services"] .ms-note[data-for="services"] { display: block; }

    /* Authority slide */
    .gov-diagram {
      flex: 1;
      min-height: 0;
      display: flex;
      flex-direction: column;
      justify-content: center;
      gap: 0.4rem;
      width: min(100%, 38rem);
      margin: 0 auto;
    }

    .gov-tier {
      border: 2px solid var(--gray-700);
      border-radius: 6px;
      padding: 0.7rem 2.6rem;
      background: #fff;
      text-align: center;
      position: relative;
    }

    .gov-tier .num-badge {
      position: absolute;
      left: 0.7rem;
      top: 50%;
      transform: translateY(-50%);
    }

    .gov-tier.gov-multisig { background: var(--gray-100); border-radius: 999px; }
    .gov-tier.gov-baton { background: var(--gray-50); border-color: var(--gray-800); }
    .gov-tier.gov-apps { border-style: dashed; border-color: var(--gray-500); background: var(--gray-50); }

    .gov-tier-label {
      font-size: 0.98rem;
      font-weight: 700;
      letter-spacing: 0.02em;
      color: var(--gray-800);
    }

    .gov-tier-note {
      margin-top: 0.22rem;
      font-size: 0.74rem;
      font-weight: 600;
      line-height: 1.35;
      color: var(--gray-600);
    }

    .gov-arrow {
      text-align: center;
      font-size: 1.05rem;
      line-height: 1;
      color: var(--gray-700);
      flex-shrink: 0;
    }

    .gov-footnote {
      margin-top: 0.35rem;
      text-align: center;
      font-size: 0.78rem;
      color: var(--gray-500);
      font-style: italic;
    }

    /* Examples slides */
    .slide:has(.examples-slide) {
      display: flex;
      align-items: stretch;
      justify-content: center;
    }

    .arch-box.examples-slide {
      width: 100%;
      height: 100%;
      padding: 1.25rem 1.6rem 1.1rem;
      gap: 0.7rem;
    }

    .arch-box.examples-slide .box-header { padding-bottom: 0.55rem; }
    .arch-box.examples-slide .box-header h2 { font-size: 1.55rem; }

    .ex-body {
      flex: 1;
      min-height: 0;
      display: flex;
      flex-direction: column;
      justify-content: center;
      gap: 0.6rem;
      width: min(100%, 70rem);
      margin: 0 auto;
    }

    .ex-label {
      font-size: 0.72rem;
      font-weight: 700;
      letter-spacing: 0.12em;
      text-transform: uppercase;
      color: var(--gray-500);
      margin-top: 0.4rem;
    }

    .ex-grid { display: grid; gap: 1.25rem; }
    .ex-grid-2 { grid-template-columns: 1fr 1fr; }

    .ex-card {
      border: 1.5px solid var(--gray-300);
      border-radius: 6px;
      background: #fff;
      padding: 1.35rem 1.5rem;
    }

    .ex-card.ex-today { border-color: var(--gray-800); background: var(--gray-50); }

    .ex-head { display: flex; align-items: baseline; gap: 0.7rem; margin-bottom: 0.55rem; flex-wrap: wrap; }

    .ex-name { font-size: 1.25rem; font-weight: 700; color: var(--gray-900); }

    .ex-pattern .ex-name { margin-bottom: 0.4rem; }

    .ex-tag {
      font-size: 0.74rem;
      font-weight: 700;
      letter-spacing: 0.05em;
      text-transform: uppercase;
      color: var(--gray-500);
    }

    .ex-text { font-size: 1.02rem; line-height: 1.55; color: var(--gray-700); }
    .ex-text strong { color: var(--gray-900); font-weight: 650; }


    /* Today slide: text + mini orchestra */
    .today-split {
      flex: 1;
      min-height: 0;
      display: grid;
      grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
      gap: 2rem;
      align-items: center;
    }

    .today-text { display: flex; flex-direction: column; gap: 1.05rem; }

    .today-h {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--gray-900);
      margin-bottom: 0.3rem;
    }

    .today-block p,
    .today-block li { font-size: 0.95rem; line-height: 1.5; color: var(--gray-700); }
    .today-block strong { color: var(--gray-900); font-weight: 650; }

    .today-block ul.bullets-hollow { list-style: none; padding: 0; margin: 0; }
    .today-block ul.bullets-hollow > li { position: relative; padding-left: 1.1rem; margin-bottom: 0.35rem; }
    .today-block ul.bullets-hollow > li::before {
      content: "";
      position: absolute;
      left: 0;
      top: 0.5em;
      width: 0.42rem;
      height: 0.42rem;
      border-radius: 50%;
      border: 1.5px solid var(--gray-500);
    }

    .today-diagram {
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 0.3rem;
    }

    .today-diagram .multisig-pill,
    .today-diagram .arrow-down,
    .today-diagram .casals-row,
    .today-diagram .casals-box.casals-wasms,
    .today-diagram .orch-label,
    .today-diagram .sec-label,
    .today-diagram .stand-label { display: block; }
    .today-diagram .casals-row { display: flex; }
    .today-diagram .can.baton { display: inline-block; }
    .today-diagram .casals-box.casals-wasms { border-style: solid; border-color: var(--gray-700); background: #fff; }
    .today-diagram .stand-label em { font-style: normal; font-weight: 700; color: var(--gray-900); }
    .today-diagram .sections { align-items: stretch; }
    .today-diagram .section {
      border-color: var(--gray-700);
      padding: 0.5rem 0.6rem;
      min-width: 11rem;
    }
    .today-diagram .orchestra {
      border-color: var(--gray-400);
      background: var(--gray-50);
      padding: 0.65rem 0.75rem;
    }
    .today-diagram .stand-more { border-style: dashed; }

    @media (max-width: 900px) {
      .slide { padding: 0.75rem 0.85rem 0.65rem; }
      .arch-box.casals-box-slide,
      .arch-box.title-slide,
      .arch-box.section-divider-slide { width: 100%; padding: 1.4rem 1.1rem; }
      .title-slide .title-main,
      .section-divider-slide .box-header h2 { font-size: 1.85rem; }
      .rationale-split { grid-template-columns: 1fr; }
      .step-panel { border-left: none; border-top: 1px solid var(--gray-200); padding: 0.75rem 0 0; }
      .sections { flex-direction: column; }
      .axis-y { display: none !important; }
      .rail-label { display: none; }
    }

    /* generated per-phase rules */
    .rationale-slide[data-phase="app"] .step-detail[data-for="app"] { display: flex; }
    .rationale-slide[data-phase="app"] .ms-note[data-for="app"] { display: block; }
    .rationale-slide[data-phase="control"] .step-detail[data-for="control"] { display: flex; }
    .rationale-slide[data-phase="control"] .ms-note[data-for="control"] { display: block; }
    .rationale-slide[data-phase="grow-x"] .step-detail[data-for="grow-x"] { display: flex; }
    .rationale-slide[data-phase="grow-x"] .ms-note[data-for="grow-x"] { display: block; }
    .rationale-slide[data-phase="grow-y"] .step-detail[data-for="grow-y"] { display: flex; }
    .rationale-slide[data-phase="grow-y"] .ms-note[data-for="grow-y"] { display: block; }
    .rationale-slide[data-phase="shared"] .step-detail[data-for="shared"] { display: flex; }
    .rationale-slide[data-phase="shared"] .ms-note[data-for="shared"] { display: block; }
    .rationale-slide[data-phase="conductor"] .step-detail[data-for="conductor"] { display: flex; }
    .rationale-slide[data-phase="conductor"] .ms-note[data-for="conductor"] { display: block; }
    .rationale-slide[data-phase="baton"] .step-detail[data-for="baton"] { display: flex; }
    .rationale-slide[data-phase="baton"] .ms-note[data-for="baton"] { display: block; }
    .rationale-slide[data-phase="services"] .step-detail[data-for="services"] { display: flex; }
    .rationale-slide[data-phase="services"] .ms-note[data-for="services"] { display: block; }