/* THROWAWAY: three study path hierarchies; rendered only outside production. */
@layer app {
  .path-prototype { padding: 12px 0 100px; color: #202522; }
  .path-prototype p { color: inherit; }
  .pp-breadcrumb { display: flex; align-items: center; gap: 18px; margin-bottom: 38px; font-size: 12px; color: #686e68; }
  .pp-breadcrumb > span { padding-left: 18px; border-left: 1px solid #ccc; font-size: 10px; letter-spacing: .12em; }
  .pp-breadcrumb > a:last-child { margin-left: auto; }
  .path-prototype .pp-kicker { font-size: 10px; letter-spacing: .13em; font-weight: 800; margin-bottom: 15px; }
  .pp-heading { display: flex; justify-content: space-between; align-items: center; margin-bottom: 32px; gap: 24px; }
  .path-prototype h1 { font-size: clamp(32px, 3.4vw, 52px); line-height: 1.08; letter-spacing: -.055em; }
  .pp-progress { width: 190px; }
  .pp-progress > strong { font-size: 40px; letter-spacing: -.05em; }
  .pp-progress strong span { font-size: 22px; color: #969b95; }
  .pp-progress p { font-size: 11px; margin: 5px 0 12px; }
  .pp-progress progress { width: 100%; height: 5px; accent-color: #236449; }
  .pp-progress progress::-webkit-progress-bar { background: #dce2d8; border-radius: 9px; }
  .pp-progress progress::-webkit-progress-value { background: #236449; border-radius: 9px; }
  .pp-desk { display: grid; grid-template-columns: minmax(0, 1fr) 235px; gap: 30px; }
  .pp-feature { background: #184bcb; border-radius: 20px; color: white; padding: 32px 32px 0; position: relative; overflow: hidden; }
  .pp-feature-copy { position: relative; z-index: 1; width: 73%; }
  .pp-feature .pp-kicker { color: #e1ffab; }
  .pp-feature h2 { font-size: clamp(24px, 2.25vw, 35px); line-height: 1.2; letter-spacing: -.04em; max-width: 560px; }
  .pp-feature-copy > p:not(.pp-kicker) { font-size: 12px; margin: 15px 0 22px; color: #d8e5ff; }
  .pp-mascot { position: absolute; right: -14px; top: 48px; width: 200px; transform: rotate(8deg); pointer-events: none; }
  .pp-button { display: inline-flex; justify-content: space-between; align-items: center; gap: 28px; background: #202522; color: white; border: 0; border-radius: 9px; padding: 14px 20px; font: inherit; font-size: 12px; font-weight: 800; cursor: pointer; min-height: 44px; }
  .pp-feature .pp-button { background: #e1ffab; color: #192721; }
  .pp-feature-foot { display: flex; justify-content: space-between; gap: 10px; border-top: 1px solid #ffffff35; padding: 17px 0; margin-top: 27px; font-size: 10px; color: #e4eaff; position: relative; }
  .pp-note { background: #e5eddb; border-radius: 16px; padding: 24px; }
  .pp-note-icon { display: block; font-size: 36px; margin-bottom: 28px; }
  .pp-note h2 { font-size: 20px; line-height: 1.25; letter-spacing: -.03em; }
  .pp-note p:not(.pp-kicker), .pp-quiet p { font-size: 12px; line-height: 1.7; color: #5a6355; margin: 12px 0; }
  .pp-note a, .pp-adjust { font-size: 11px; font-weight: 800; }
  .pp-note a { display: block; margin-top: 25px; }
  .pp-quiet { padding: 26px 10px; border-bottom: 1px solid #d9ddd5; }
  .pp-quiet h3 { font-size: 18px; }
  .pp-adjust { display: block; padding: 22px 10px; }
  .pp-section-title { display: flex; align-items: baseline; justify-content: space-between; gap: 16px; margin: 30px 0 15px; }
  .pp-section-title h2 { font-size: 19px; letter-spacing: -.035em; }
  .pp-section-title > span { font-size: 11px; color: #6c716b; }
  .pp-session-list { list-style: none; padding: 0; margin: 0; }
  .pp-session { border-top: 1px solid #dce0d8; }
  .pp-session summary { list-style: none; display: flex; align-items: center; gap: 18px; padding: 18px 8px; cursor: pointer; }
  .pp-session summary::-webkit-details-marker { display: none; }
  .pp-number { font-size: 12px; color: #7a8375; min-width: 24px; }
  .pp-topic { flex: 1; min-width: 0; }
  .pp-topic small { display: block; font-size: 9px; letter-spacing: .08em; color: #747c70; margin-bottom: 6px; }
  .pp-topic strong { display: block; font-size: 13px; line-height: 1.45; font-weight: 700; }
  .pp-date { font-size: 10px; white-space: nowrap; color: #737b6e; }
  .pp-expand { font-size: 20px; font-weight: 500; }
  .pp-is-next .pp-topic small { color: #174fbd; font-weight: 800; }
  .pp-is-next .pp-number { color: #184bcb; }
  .pp-session details[open] .pp-expand { transform: rotate(45deg); }
  .pp-session summary:hover { background: #e9ede450; }
  .pp-session-detail { padding: 8px 36px 24px 50px; font-size: 12px; line-height: 1.8; }
  .pp-session-detail .pp-kicker { margin: 16px 0 5px; }
  .pp-session-detail ul { padding-left: 16px; }
  .pp-text-button { font: inherit; font-size: 11px; font-weight: 800; border: 0; background: transparent; padding: 12px 0; min-height: 44px; cursor: pointer; color: inherit; }
  .path-prototype :is(button, a, summary):focus-visible { outline: 3px solid #467dce; outline-offset: 4px; }
  .pp-preview { max-width: min(440px, calc(100vw - 32px)); padding: 32px; border: 0; border-radius: 18px; color: #202522; background: #fff; }
  .pp-preview::backdrop { background: #15222270; }
  .pp-preview h2 { font-size: 25px; letter-spacing: -.04em; }
  .pp-preview > p:not(.pp-kicker) { font-size: 13px; line-height: 1.7; margin: 15px 0 22px; }
  /* B: a typographic notebook, with the course as margin notes. */
  .pp-notebook { background: #faf7ee; border: 1px solid #ded8c8; padding: 38px 46px; }
  .pp-notebook-heading { border-bottom: 2px solid #26392b; padding-bottom: 22px; }
  .pp-B h1 { font-family: Georgia, serif; font-weight: 400; font-size: clamp(42px, 4.8vw, 72px); letter-spacing: -.055em; color: #26392b; }
  .pp-notebook-heading .pp-kicker { color: #776944; }
  .pp-notebook-meta { display: flex; gap: 32px; font-size: 11px; margin-top: 25px; }
  .pp-notebook-body { display: grid; grid-template-columns: 230px minmax(0, 1fr); gap: 50px; }
  .pp-margin { padding-top: 32px; }
  .pp-margin h2 { font-family: Georgia, serif; font-size: 25px; line-height: 1.2; font-weight: 400; margin-top: 10px; }
  .pp-margin > p { font-size: 12px; line-height: 1.7; margin-top: 16px; color: #78725f; }
  .pp-margin-next { border-left: 2px solid #94773f; padding-left: 18px; margin: 32px 0; }
  .pp-margin-next h3 { font-size: 14px; line-height: 1.6; margin-bottom: 16px; }
  .pp-margin .pp-button { background: #26392b; padding: 12px; font-size: 10px; }
  .pp-margin > a { display: block; font-size: 11px; margin: 18px 0; }
  .pp-B .pp-session { border-color: #ddd7c7; }
  .pp-B .pp-topic strong { font-family: Georgia, serif; font-size: 19px; font-weight: 400; }
  .pp-B .pp-is-next { background: #efe9d9; }
  .pp-B .pp-session summary { padding: 21px 12px; }
  .pp-B .pp-is-next :is(.pp-number, .pp-topic small) { color: #795b20; }
  /* C: schedule-first board, actual dates and actual minutes, no invented chapters. */
  .pp-board-heading { display: flex; align-items: center; justify-content: space-between; gap: 25px; }
  .pp-board-heading h1 { font-size: clamp(32px, 3.5vw, 52px); }
  .pp-board-heading > div > p:last-child { font-size: 13px; margin: 15px 0 25px; color: #626b64; }
  .pp-board-heading .pp-button { background: #224c3a; }
  .pp-board-summary { border-block: 1px solid #d5dbd2; padding: 18px 0; display: flex; align-items: center; gap: 30px; font-size: 11px; }
  .pp-board-summary strong { font-size: 16px; margin-right: 6px; }
  .pp-board-summary a { margin-left: auto; }
  .pp-days { display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); gap: 12px; align-items: start; }
  .pp-day { background: #eeeee9; border-radius: 13px; padding: 12px; min-width: 0; }
  .pp-day > header { display: flex; align-items: baseline; gap: 7px; padding: 0 3px 13px; }
  .pp-day > header > span { font-size: 10px; text-transform: uppercase; }
  .pp-day > header > strong { font-size: 24px; letter-spacing: -.06em; }
  .pp-day > header > small { margin-left: auto; font-size: 9px; color: #677361; }
  .pp-C .pp-session { border: 0; background: white; border-radius: 8px; margin-bottom: 9px; }
  .pp-C .pp-session:last-child { margin: 0; }
  .pp-C .pp-is-next { background: #dfff9d; }
  .pp-C .pp-session summary { flex-wrap: wrap; gap: 6px; padding: 15px 12px; align-items: start; }
  .pp-C .pp-number { display: none; }
  .pp-C .pp-topic { flex: auto; width: 100%; }
  .pp-C .pp-topic strong { font-size: 12px; min-height: 72px; }
  .pp-C .pp-date { display: none; }
  .pp-C .pp-expand { margin-left: auto; margin-top: 6px; }
  .pp-C .pp-is-next .pp-topic small { color: #315627; }
  .pp-C .pp-session-detail { padding: 0 12px 14px; font-size: 11px; }
  .pp-C .pp-session-detail .pp-kicker { font-size: 8px; }
  .pp-board-footer { display: flex; flex-wrap: wrap; align-items: center; gap: 22px; border-top: 1px solid #d5dbd2; margin-top: 35px; padding-top: 18px; font-size: 11px; }
  @media (max-width: 1050px) { .pp-desk { grid-template-columns: minmax(0, 1fr) 195px; gap: 20px; } .pp-mascot { width: 150px; top: 70px; } .pp-days { grid-template-columns: repeat(3, minmax(0, 1fr)); } .pp-notebook { padding: 28px; } .pp-notebook-body { grid-template-columns: 180px minmax(0, 1fr); gap: 25px; } }
  @media (max-width: 700px) {
    .pp-breadcrumb { gap: 10px; font-size: 10px; margin-bottom: 28px; } .pp-breadcrumb > span { display: none; } .pp-heading { align-items: start; } .pp-progress { width: 110px; flex-shrink: 0; } .pp-progress > strong { font-size: 30px; } .pp-desk { grid-template-columns: 1fr; } .pp-desk-aside { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; } .pp-adjust { grid-column: 1 / -1; } .pp-feature { padding: 24px 20px 0; } .pp-feature-copy { width: 84%; } .pp-mascot { width: 110px; opacity: .4; right: -20px; top: 90px; } .pp-feature-foot { font-size: 9px; } .pp-date { display: none; } .pp-session summary { gap: 10px; } .pp-section-title > span { font-size: 9px; } .pp-note { padding: 18px; } .pp-note h2 { font-size: 17px; } .pp-notebook { padding: 22px 18px; } .pp-notebook-body { grid-template-columns: 1fr; gap: 0; } .pp-margin { padding-top: 22px; } .pp-margin > p, .pp-margin > a { display: none; } .pp-margin-next { margin: 20px 0 0; } .pp-notebook-meta { gap: 12px; flex-wrap: wrap; } .pp-B .pp-topic strong { font-size: 17px; } .pp-board-heading { align-items: start; flex-direction: column; gap: 0; } .pp-board-heading .pp-button { margin-bottom: 24px; } .pp-board-summary { gap: 15px; flex-wrap: wrap; } .pp-board-summary a { margin-left: 0; } .pp-days { grid-template-columns: repeat(2, minmax(0, 1fr)); } .pp-C .pp-topic strong { min-height: 0; } .pp-session-detail { padding-left: 20px; } .pp-section-title h2 { font-size: 16px; }
  }
}

/* Round 2: C's tactile cards and lime marker, organized by course sequence. */
@layer app {
  .pp-round-two { --pp-green: #244a38; --pp-lime: #ddfa9b; }
  .pp2-heading { display: flex; justify-content: space-between; gap: 24px; align-items: center; margin: 0 0 24px; }
  .pp2-heading h1 { font-size: clamp(30px, 3.2vw, 46px); }
  .pp2-title-dot { color: #719a46; }
  .pp2-heading .pp-kicker { color: #697363; margin-bottom: 12px; }
  .pp2-heading > div > p:last-child { font-size: 12px; color: #697163; margin-top: 12px; }
  .pp2-count > strong { font-size: 32px; letter-spacing: -.05em; }
  .pp2-count strong > span { color: #92998c; font-size: 19px; }
  .pp2-count small { display: block; font-size: 10px; color: #697163; margin-top: 5px; }
  .pp2-progress-segments { display: flex; gap: 5px; height: 5px; margin-bottom: 28px; }
  .pp2-progress-segments > span { flex: 1; border-radius: 3px; background: #dfe3da; }
  .pp2-progress-segments > .done { background: var(--pp-green); }
  .pp2-progress-segments > .next { background: #91b85e; }
  .pp-round-two .pp-button { background: var(--pp-green); }
  .pp2-toolbar { display: flex; align-items: center; gap: 22px; margin-bottom: 24px; font-size: 11px; color: #697163; }
  .pp2-toolbar strong { color: #2c392a; }
  .pp2-toolbar .pp-button { margin-left: auto; }
  .pp2-collection { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 16px; align-items: start; }
  .pp-D .pp-session { background: white; border: 1px solid #e5e8df; border-radius: 16px; overflow: hidden; }
  .pp-D .pp-is-next { background: var(--pp-lime); border-color: #cbe595; }
  .pp-D .pp-session summary { padding: 22px; flex-wrap: wrap; gap: 0; }
  .pp-D .pp-number { width: 100%; font-size: 27px; letter-spacing: -.05em; margin-bottom: 26px; color: #9ca594; }
  .pp-D .pp-is-next .pp-number { color: #486632; }
  .pp-D .pp-topic { flex: auto; width: 100%; min-height: 103px; }
  .pp-D .pp-topic strong { font-size: 15px; line-height: 1.45; }
  .pp-round-two .pp-is-next .pp-topic small { color: #476730; }
  .pp-D .pp-date { margin-top: 20px; font-size: 10px; }
  .pp-D .pp-expand { margin: 16px 0 0 auto; }
  .pp-D .pp-session-detail { padding: 0 22px 22px; font-size: 11px; }
  .pp2-tools { display: flex; align-items: center; flex-wrap: wrap; gap: 24px; font-size: 10px; color: #646e60; border-top: 1px solid #dce0d6; margin-top: 32px; padding: 16px 0; }
  .pp2-tools > span { margin-right: auto; }
  /* E: selectable sequence + one generous preview; no repeating detail cards. */
  .pp2-explorer { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); background: #eeefe9; border-radius: 20px; padding: 12px; gap: 18px; align-items: start; }
  .pp2-explorer-list { padding: 8px; }
  .pp2-list-heading { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 10px 0 20px; font-size: 12px; }
  .pp2-list-heading > span { font-size: 10px; color: #74806b; }
  .pp2-explorer-list ol { list-style: none; padding: 0; margin: 0; display: grid; gap: 7px; }
  .pp2-select { display: flex; align-items: center; gap: 14px; padding: 16px 12px; border-radius: 10px; color: #343d30; }
  .pp2-select:hover { background: #e3e7dc; }
  .pp2-select.selected { background: var(--pp-lime); }
  .pp2-select-number { font-size: 11px; color: #7b876e; }
  .pp2-select > span:nth-child(2) { flex: 1; }
  .pp2-select strong { display: block; font-size: 12px; line-height: 1.5; }
  .pp2-select small { display: block; font-size: 9px; margin-top: 6px; color: #697c59; }
  .pp2-select > span:last-child { font-size: 17px; }
  .pp2-inspector { position: sticky; top: 30px; background: white; border-radius: 13px; padding: 30px; }
  .pp2-inspector-top { display: flex; justify-content: space-between; gap: 15px; font-size: 9px; font-weight: 800; color: #6c7a60; letter-spacing: .08em; }
  .pp2-inspector h2 { font-size: clamp(22px, 2.2vw, 33px); line-height: 1.2; letter-spacing: -.045em; margin: 30px 0 15px; }
  .pp2-inspector .pp2-inspector-date { font-size: 10px; color: #7b8373; margin-bottom: 24px; }
  .pp2-inspector > .pp-button { width: 100%; }
  .pp2-inspector-reason { border-top: 1px solid #e1e5da; padding-top: 24px; margin-top: 28px; }
  .pp2-inspector-reason > p:last-child { font-size: 12px; line-height: 1.9; color: #59624f; }
  .pp2-inspector-sources { background: #f3f5ef; border-radius: 10px; padding: 18px; margin-top: 25px; }
  .pp2-inspector-sources > p:not(.pp-kicker) { font-size: 10px; line-height: 1.7; overflow-wrap: anywhere; margin-top: 10px; }
  .pp2-inspector footer { display: flex; justify-content: space-between; border-top: 1px solid #e1e5da; margin-top: 25px; padding-top: 20px; font-size: 10px; }
  /* F: a connected vertical trail with the next step as its fixed compass. */
  .pp2-path-layout { display: grid; grid-template-columns: 290px minmax(0, 1fr); gap: 50px; align-items: start; }
  .pp2-path-compass { background: var(--pp-green); color: white; padding: 26px; border-radius: 18px; position: sticky; top: 30px; }
  .pp2-compass-top { display: flex; align-items: start; justify-content: space-between; color: var(--pp-lime); margin-bottom: 18px; }
  .pp2-compass-arrow { font-size: 33px; line-height: 1; }
  .pp2-path-compass h2 { font-size: 24px; line-height: 1.25; letter-spacing: -.04em; }
  .pp2-path-compass > p { font-size: 11px; color: #d4e1cd; margin: 18px 0 24px; line-height: 1.7; }
  .pp2-path-compass .pp-button { background: var(--pp-lime); color: #244a38; width: 100%; }
  .pp2-compass-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; border-top: 1px solid #ffffff30; margin-top: 28px; padding-top: 24px; }
  .pp2-compass-stats span { font-size: 9px; color: #d4e1cd; }
  .pp2-compass-stats strong { display: block; font-size: 26px; color: white; margin-bottom: 5px; }
  .pp2-compass-note { border-top: 1px solid #ffffff30; padding-top: 22px; margin-top: 24px; }
  .pp2-compass-note .pp-kicker { color: #c0d2b5; font-size: 8px; }
  .pp2-compass-note > p:last-child { color: #c0d2b5; font-size: 10px; line-height: 1.8; }
  .pp2-trail .pp-session-list { position: relative; }
  .pp2-trail .pp-session-list::before { content: ""; position: absolute; left: 18px; top: 35px; bottom: 35px; width: 1px; background: #cbd4c1; }
  .pp-F .pp-session { border: 0; margin-bottom: 14px; padding-left: 58px; position: relative; }
  .pp-F .pp-session details { background: white; border: 1px solid #e2e6da; border-radius: 13px; }
  .pp-F .pp-is-next details { background: var(--pp-lime); border-color: #c9df9f; }
  .pp-F .pp-session summary { padding: 20px; gap: 14px; }
  .pp-F .pp-number { position: absolute; left: 0; width: 37px; height: 37px; border-radius: 50%; background: #f5f5f3; border: 1px solid #cbd4c1; display: grid; place-items: center; color: #617350; font-size: 10px; }
  .pp-F .pp-is-next .pp-number { background: var(--pp-green); color: white; border-color: var(--pp-green); }
  .pp-F .pp-topic strong { font-size: 14px; }
  .pp-F .pp-session-detail { padding: 0 20px 22px; }
  .pp2-trail-end { display: flex; flex-direction: column; align-items: center; gap: 9px; margin: 30px 0; text-align: center; }
  .pp2-trail-end > span { font-size: 26px; color: #799358; }
  .pp2-trail-end strong { font-size: 13px; }
  .pp2-trail-end small { font-size: 9px; color: #6c7862; }
  @media (max-width: 1000px) { .pp2-collection { grid-template-columns: repeat(2, minmax(0, 1fr)); } .pp2-path-layout { grid-template-columns: 225px minmax(0, 1fr); gap: 24px; } .pp2-path-compass { padding: 22px; } .pp2-inspector { padding: 24px; } }
  @media (max-width: 700px) { .pp2-heading { align-items: start; gap: 15px; } .pp2-heading h1 { font-size: 30px; } .pp2-count { flex-shrink: 0; } .pp2-count strong { font-size: 25px; } .pp2-count small { max-width: 75px; font-size: 9px; } .pp2-heading .pp-kicker { font-size: 8px; } .pp2-toolbar { flex-wrap: wrap; gap: 14px; } .pp2-toolbar .pp-button { margin-left: 0; } .pp2-collection { gap: 10px; } .pp-D .pp-session summary { padding: 16px; } .pp-D .pp-topic { min-height: 116px; } .pp-D .pp-topic strong { font-size: 12px; } .pp-D .pp-number { margin-bottom: 18px; font-size: 24px; } .pp-D .pp-topic small { font-size: 8px; } .pp-D .pp-session-detail { padding: 0 16px 16px; } .pp2-explorer { grid-template-columns: 1fr; } .pp2-explorer-list ol { max-height: 310px; overflow: auto; } .pp2-inspector { position: static; } .pp2-path-layout { grid-template-columns: 1fr; gap: 20px; } .pp2-path-compass { position: static; } .pp2-compass-note { display: none; } .pp2-compass-stats { display: flex; gap: 30px; margin-top: 20px; padding-top: 16px; } .pp2-compass-stats strong { display: inline; font-size: 19px; margin-right: 5px; } .pp2-tools { gap: 12px 20px; } .pp2-tools > span { flex-basis: 100%; } .pp-F .pp-session { padding-left: 45px; } .pp-F .pp-session summary { padding: 17px; } }
}