/* ============================================================
   Write it Right — casebook modal, tabs, redactions, practice
   ============================================================ */

.casebook-overlay {
  position: fixed;
  inset: 0;
  z-index: 500;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px 16px;
  background: var(--navy-overlay);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}
.casebook-overlay.open { opacity: 1; pointer-events: auto; }

/* the book wrapper provides 3D perspective for the cover flip */
.casebook {
  width: 660px;
  max-width: 100%;
  max-height: 88vh;
  position: relative;
  perspective: 1600px;
  transform: translateY(120%) scale(0.9);
  transition: transform var(--d-medium) var(--ease-page);
}
.casebook-overlay.open .casebook { transform: translateY(0) scale(1); }

/* hardcover that flips open along the spine */
.casebook-cover {
  position: absolute;
  inset: 0;
  z-index: 10;
  background:
    linear-gradient(135deg, rgba(0, 51, 102, 0.55) 0%, rgba(0, 28, 63, 0.4) 50%, rgba(0, 16, 42, 0.6) 100%),
    url("../images/textures/navy-linen.webp");
  background-size: cover;
  border-radius: 8px 3px 3px 8px;
  transform-origin: left center;
  transform: rotateY(0deg);
  box-shadow: var(--sh-modal), var(--sh-emboss-on-cover);
  backface-visibility: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  pointer-events: none;
}
.casebook-cover::before {
  content: "";
  position: absolute;
  inset: 14px;
  border: 1.5px solid rgba(201, 169, 97, 0.55);
  border-radius: 4px;
}
.casebook-cover .cover-emboss { margin-bottom: 14px; }
.casebook-cover .cover-case-no {
  font-family: var(--font-serif);
  font-size: 34px;
  font-weight: 500;
  color: var(--gold-light);
  text-shadow: 2px 2px 0 rgba(0, 0, 0, 0.7);
  margin: 0;
}
.casebook.opening .casebook-cover { animation: cb-cover-flip var(--d-page) var(--ease-page) forwards 0.25s; }
.casebook.open-done .casebook-cover { transform: rotateY(-165deg); opacity: 0; visibility: hidden; }
.casebook.closing .casebook-cover { animation: cb-cover-shut 0.4s var(--ease-page) forwards; }
@keyframes cb-cover-flip { from { transform: rotateY(0); } to { transform: rotateY(-165deg); } }
@keyframes cb-cover-shut { from { transform: rotateY(-165deg); } to { transform: rotateY(0); } }

/* the paper page */
.casebook-page {
  background: var(--paper-cream);
  background-image:
    url("../images/textures/paper-aged.webp"),
    linear-gradient(90deg, transparent 59px, rgba(201, 169, 97, 0.45) 59px 60px, transparent 60px),
    repeating-linear-gradient(transparent 0 25px, var(--ruled-blue) 25px 26px);
  background-blend-mode: multiply, normal, normal;
  background-size: 600px, auto, auto;
  border-radius: 0;
  box-shadow: var(--sh-modal), inset 4px 0 12px rgba(0, 28, 63, 0.15);
  max-height: 88vh;
  overflow-y: auto;
  overscroll-behavior: contain;
  position: relative;
  padding: 30px 36px 30px 76px;
}
@media (max-width: 719px) {
  .casebook { max-height: 94vh; }
  .casebook-page { padding: 24px 18px 24px 44px; max-height: 94vh; }
}

/* manila folder tab peeking from the top of the book */
.case-folder-tab {
  position: absolute;
  top: 1px; left: 70px;
  z-index: 1;
  transform: translateY(-100%);
  background: #E8D9B0;
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--brown-ink);
  padding: 5px 16px 3px;
  border-radius: 6px 6px 0 0;
  box-shadow: 0 -2px 6px rgba(0, 0, 0, 0.25);
}

/* close button */
.casebook-close {
  position: sticky;
  top: 0;
  float: right;
  margin: -12px -18px 0 12px;
  z-index: 30;
  width: 34px; height: 34px;
  border-radius: 50%;
  border: 1.5px solid var(--navy-deep);
  background: var(--paper-cream);
  color: var(--navy-deep);
  font-size: 16px;
  line-height: 1;
  cursor: pointer;
  transition: transform var(--d-fast) ease, background var(--d-fast) ease;
}
.casebook-close:hover { transform: rotate(90deg); background: var(--gold-thread-bg); }
.casebook-close:focus-visible { outline: 2px solid var(--gold-emboss); outline-offset: 2px; }

/* prev / next character nav */
.case-nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 510;
  width: 42px; height: 42px;
  border-radius: 50%;
  border: 1.5px solid var(--gold-foil);
  background: rgba(0, 16, 42, 0.85);
  color: var(--gold-foil);
  font-size: 17px;
  cursor: pointer;
  transition: background var(--d-fast) ease, color var(--d-fast) ease, transform var(--d-fast) ease;
}
.case-nav:hover { background: var(--gold-foil); color: var(--navy-deep); transform: translateY(-50%) scale(1.08); }
/* nav lives inside the .casebook dialog (660px) so screen readers reach it
   within the modal; offset just outside each edge of the book */
.case-nav.prev { left: -64px; }
.case-nav.next { right: -64px; }
@media (max-width: 860px) { .case-nav { display: none; } }

/* ---------- page header ---------- */
.case-header { position: relative; margin-bottom: 6px; padding-right: 92px; }
.case-eyebrow {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--gold-emboss);
  margin: 0 0 8px;
}
.case-title-row { display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; }
.case-title {
  font-family: var(--font-serif);
  font-size: 30px;
  font-weight: 500;
  color: var(--navy-deep);
  margin: 0;
}
.case-age {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--brown-ink);
  text-transform: uppercase;
}
.case-tagline {
  font-family: var(--font-serif);
  font-style: italic;
  font-size: 16px;
  color: var(--brown-ink);
  margin: 4px 0 0;
}
.case-stamp {
  position: absolute;
  top: -4px; right: 6px;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  padding: 4px 11px;
  border-radius: var(--r-soft);
  transform: rotate(-6deg);
  opacity: 0;
}
.casebook.open-done .case-stamp,
.casebook.swap-done .case-stamp { animation: stamp-thump var(--d-stamp) var(--ease-stamp) forwards; }
.case-stamp.core { color: var(--navy-deep); border: 2px solid var(--navy-deep); background: rgba(232, 238, 248, 0.85); }
.case-stamp.bonus { color: var(--gold-emboss); border: 2px solid var(--gold-foil); background: rgba(252, 244, 220, 0.9); }
.case-stamp.urgent { color: var(--urgent-red); border: 2px solid var(--urgent-red); background: var(--urgent-bg); }
.case-stamp.practice { color: var(--gold-emboss); border: 2px double var(--gold-foil); background: rgba(252, 248, 236, 0.95); }

/* ---------- tabs ---------- */
.case-tabs {
  display: flex;
  gap: 4px;
  margin: 18px 0 0;
  border-bottom: 1px solid rgba(0, 28, 63, 0.18);
  position: relative;
}
.case-tabs[hidden] { display: none; }
.case-tab {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--navy-deep);
  opacity: 0.5;
  background: none;
  border: none;
  padding: 11px 16px 12px;
  cursor: pointer;
  position: relative;
  transition: opacity var(--d-fast) var(--ease-tab);
}
.case-tab:hover { opacity: 0.85; }
.case-tab[aria-selected="true"] { opacity: 1; }
.case-tab:focus-visible { outline: 2px solid var(--gold-emboss); outline-offset: -2px; }
/* gold bookmark ribbon hanging from the tab strip over the active tab */
.case-tab-underline {
  position: absolute;
  top: 100%;
  margin-top: -1px;
  height: 24px;
  background: linear-gradient(180deg, var(--gold-bright) 0%, var(--gold-foil) 70%, var(--gold-emboss) 100%);
  clip-path: polygon(0 0, 100% 0, 100% 100%, 50% 68%, 0 100%);
  box-shadow: 0 3px 7px rgba(0, 28, 63, 0.3);
  opacity: 0.95;
  pointer-events: none;
  transition: left var(--d-quick) var(--ease-tab), width var(--d-quick) var(--ease-tab);
}

/* ---------- body / content swap ---------- */
/* top room so the gold bookmark ribbon (hangs ~24px below the active tab)
   clears the photo row + its washi tape instead of being covered by it */
.case-body { padding-top: 38px; position: relative; }
/* page flip sheen: a lifted-page gradient sweeps corner to corner on tab switch */
.case-body::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0;
  background: linear-gradient(125deg, transparent 32%, rgba(0, 28, 63, 0.07) 44%, rgba(255, 253, 244, 0.95) 50%, #EFE6CE 54%, rgba(0, 28, 63, 0.12) 57%, transparent 70%);
  background-size: 300% 300%;
  background-position: 125% 125%;
  background-repeat: no-repeat;
}
.case-body.curling::after { animation: page-curl 0.55s var(--ease-page); }
@keyframes page-curl {
  0% { background-position: 125% 125%; opacity: 0; }
  30% { opacity: 1; }
  100% { background-position: -25% -25%; opacity: 0; }
}
.case-body.fading-out { opacity: 0; transition: opacity 0.2s ease; }
.case-body.fading-in { opacity: 1; transition: opacity 0.3s ease; }

/* photo + margin notes row */
.case-photo-row {
  display: flex;
  gap: 18px;
  align-items: flex-start;
  margin-bottom: 18px;
}
.case-polaroid {
  flex: none;
  width: 132px;
  background: var(--paper-cream);
  padding: 7px 7px 12px;
  box-shadow: var(--sh-polaroid);
  transform: rotate(-3deg);
  position: relative;
}
.case-polaroid .case-photo-img { display: block; width: 100%; height: auto; aspect-ratio: 1; object-fit: cover; }
.case-polaroid .case-polaroid-tape {
  position: absolute;
  top: -8px; left: 50%;
  width: 64px;
  height: auto;
  transform: translateX(-50%) rotate(-4deg);
  opacity: 0.92;
}
.case-margin-notes { flex: 1; min-width: 0; padding-top: 6px; }
.case-margin-note {
  font-family: var(--font-hand);
  font-size: 21px;
  line-height: 1.3;
  color: var(--gold-emboss);
  margin: 0 0 12px;
  opacity: 0;
  transform: rotate(-2deg) translateY(6px);
}
.case-margin-note:nth-child(2) { transform: rotate(1.5deg) translateY(6px); color: var(--brown-ink); }
.casebook.open-done .case-margin-note,
.casebook.swap-done .case-margin-note { animation: note-in 0.6s ease forwards; }
.casebook.open-done .case-margin-note:nth-child(2),
.casebook.swap-done .case-margin-note:nth-child(2) { animation-delay: 0.15s; }
@keyframes note-in { to { opacity: 0.92; transform: rotate(var(--note-rot, -2deg)) translateY(0); } }

/* ---------- chart ---------- */
.chart-label {
  font-family: var(--font-serif);
  font-size: 13.5px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  font-weight: 500;
  color: var(--gold-emboss);
  margin: 0 0 10px;
}
.chart-label::after { content: ""; display: block; width: 26px; height: 1px; background: var(--gold-foil); margin-top: 5px; }
.chart-excerpt {
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.85;
  color: var(--warm-text);
}
.chart-excerpt p { margin: 0 0 14px; }
/* ledger drop cap on the opening paragraph (JS marks .lead-para) */
.chart-excerpt p.lead-para::first-letter {
  font-family: var(--font-serif);
  font-size: 3.3em;
  font-weight: 500;
  float: left;
  line-height: 0.8;
  padding: 5px 8px 0 0;
  color: var(--navy-deep);
  -webkit-text-stroke: 1px var(--gold-foil);
}
.chart-excerpt strong { font-weight: 700; color: var(--navy-deep); letter-spacing: 0.01em; }

/* gold-thread highlight (passive) */
.gold-thread {
  background: var(--gold-thread-bg);
  padding: 1px 3px;
  border-bottom: 1px dashed var(--gold-foil);
}

/* ---------- redactions ---------- */
.redact {
  display: inline;
  border: none;
  font: inherit;
  line-height: inherit;
  text-align: inherit;
  padding: 1px 5px;
  background: var(--warm-text);
  background-image: repeating-linear-gradient(45deg, transparent 0 3px, rgba(245, 239, 224, 0.07) 3px 4px);
  color: transparent;
  cursor: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='26' height='26'%3E%3Ccircle cx='10' cy='10' r='6.5' fill='rgba(245,239,224,0.3)' stroke='%23C9A961' stroke-width='2'/%3E%3Cline x1='15.5' y1='15.5' x2='22' y2='22' stroke='%23C9A961' stroke-width='3.5' stroke-linecap='round'/%3E%3C/svg%3E") 10 10, pointer;
  user-select: none;
  position: relative;
  border-radius: 1px;
  /* keep the bar continuous when the phrase wraps across lines */
  -webkit-box-decoration-break: clone;
  box-decoration-break: clone;
  transition: box-shadow 0.25s ease;
}
.redact:hover:not(.revealed),
.redact:focus-visible:not(.revealed) {
  box-shadow: 0 0 0 1.5px var(--gold-foil), 0 2px 8px rgba(201, 169, 97, 0.4);
}
.redact:focus-visible { outline: none; }
/* touch devices have no magnifier cursor or hover, so signal that the bars
   are tappable with a persistent gold ring */
@media (hover: none) {
  .redact:not(.revealed) { box-shadow: 0 0 0 1.5px var(--gold-foil); }
}
.redact.revealing { opacity: 0.75; }
/* revealed: read as ordinary text with a gold-thread highlight, no box */
.redact.revealed {
  background: var(--gold-thread-bg);
  background-image: none;
  color: var(--navy-text-on-light);
  padding: 1px 2px;
  box-shadow: none;
  border-bottom: 1px dashed var(--gold-foil);
  cursor: default;
  animation: redact-dissolve 0.4s var(--ease-reveal);
}
.redact.revealed:hover,
.redact.revealed:focus-visible {
  background: rgba(201, 169, 97, 0.5);
}
@keyframes redact-dissolve {
  from { opacity: 0.2; }
  to { opacity: 1; }
}

/* tooltip with the teaching tip */
.redact-tip {
  position: absolute;
  bottom: calc(100% + 9px);
  left: 50%;
  transform: translateX(-50%) translateY(4px);
  width: 270px;
  background: var(--navy-deep);
  color: var(--gold-light);
  border: 0.5px solid var(--gold-foil);
  border-radius: 3px;
  padding: 11px 14px;
  font-family: var(--font-body);
  font-size: 13.5px;
  line-height: 1.6;
  text-align: center;
  white-space: normal;
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.5);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease 0.15s, transform 0.3s ease 0.15s;
  z-index: 25;
}
.redact-tip::after {
  content: "";
  position: absolute;
  top: 100%; left: 50%;
  transform: translateX(-50%);
  border: 6px solid transparent;
  border-top-color: var(--navy-deep);
}
.redact.revealed:hover .redact-tip,
.redact.revealed:focus .redact-tip,
.redact.just-revealed .redact-tip {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
  pointer-events: auto;
}

/* ---------- counter ---------- */
.reveal-counter {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 18px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold-emboss);
}
.reveal-counter .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--navy-deep); border: 1px solid var(--navy-deep); flex: none; }
.reveal-counter.ticked { animation: counter-tick var(--d-fast) ease; }
@keyframes counter-tick { 50% { transform: scale(1.06); color: var(--gold-foil); } }

/* ---------- wax seal sigil ---------- */
.case-sigil {
  display: none;
  align-items: center;
  gap: 16px;
  margin: 20px 0 0;
  padding: 16px 18px;
  background: rgba(250, 245, 232, 0.9);
  border-left: 3px solid var(--gold-foil);
}
.case-sigil.shown { display: flex; }
.case-sigil img {
  width: 64px;
  flex: none;
  animation: seal-emboss 0.7s var(--ease-stamp);
}
@keyframes seal-emboss {
  0% { transform: scale(2) rotate(-18deg); opacity: 0; }
  70% { transform: scale(0.95) rotate(2deg); opacity: 1; }
  100% { transform: scale(1) rotate(0); opacity: 1; }
}
.case-sigil p {
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.65;
  color: var(--navy-deep);
  margin: 0;
}

/* ---------- footer: course pitch + CTAs ---------- */
.case-footer {
  margin-top: 24px;
  padding-top: 18px;
  border-top: 1.5px dashed rgba(201, 169, 97, 0.55);
}
.case-pitch-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gold-emboss);
  margin: 0 0 10px;
}
.case-pitch-list {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
}
.case-pitch-list li {
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.65;
  color: var(--warm-text);
  padding-left: 18px;
  position: relative;
  margin-bottom: 7px;
}
.case-pitch-list li::before {
  content: "·";
  position: absolute;
  left: 4px;
  color: var(--gold-emboss);
  font-weight: 700;
}
.case-cta-row { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; }

/* ---------- practice variant ---------- */
.practice-setup {
  font-family: var(--font-body);
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--warm-text);
  margin: 0 0 16px;
}
.practice-prompt {
  font-family: var(--font-body);
  font-size: 15.5px;
  font-weight: 700;
  line-height: 1.65;
  color: var(--navy-deep);
  background: rgba(250, 245, 232, 0.85);
  border-left: 3px solid var(--gold-foil);
  padding: 12px 16px;
  margin: 0 0 16px;
}
.practice-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gold-emboss);
  margin-bottom: 6px;
}
.practice-textarea {
  width: 100%;
  min-height: 110px;
  resize: vertical;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.75;
  color: var(--warm-text);
  background: rgba(255, 253, 246, 0.85);
  background-image: repeating-linear-gradient(transparent 0 26px, var(--ruled-blue) 26px 27px);
  border: 1px solid rgba(0, 28, 63, 0.25);
  border-radius: 2px;
  padding: 10px 12px;
}
.practice-textarea:focus { outline: 2px solid var(--gold-foil); outline-offset: 1px; }
.practice-charcount {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.15em;
  color: var(--brown-ink);
  text-align: right;
  margin: 4px 0 14px;
}
.practice-reveal-btn { margin-bottom: 14px; }
.practice-answer { display: none; }
.practice-answer.shown { display: block; animation: hero-show 0.4s ease; }
.practice-answer .chart-label { margin-top: 4px; }
.practice-tips { margin: 14px 0 0; }
.practice-tip {
  display: flex;
  gap: 10px;
  font-family: var(--font-body);
  font-size: 14px;
  line-height: 1.65;
  color: var(--warm-text);
  margin-bottom: 10px;
}
.practice-tip::before { content: "✎"; color: var(--gold-emboss); flex: none; }

/* ============================================================
   Mobile: full-screen casebook, stacked layout, bottom-sheet tips
   ============================================================ */
@media (max-width: 719px) {
  .casebook-overlay { padding: 0; align-items: stretch; }
  .casebook { width: 100%; max-height: none; }
  .casebook-page {
    max-height: none;
    height: 100dvh;
    padding: 20px 18px 28px 40px;
    box-shadow: none;
  }
  .case-folder-tab { display: none; }

  .casebook-close {
    width: 44px; height: 44px;
    font-size: 20px;
    margin: -6px -8px 0 12px;
    box-shadow: 0 2px 8px rgba(0, 28, 63, 0.25);
  }

  .case-header { padding-right: 64px; }
  .case-stamp { top: 40px; right: 2px; font-size: 9px; padding: 3px 8px; }
  .case-title { font-size: 26px; }

  /* photo and margin notes stack */
  .case-photo-row { flex-direction: column; align-items: center; gap: 10px; }
  .case-polaroid { width: 150px; }
  .case-margin-notes { padding-top: 0; text-align: center; width: 100%; }
  .case-margin-note { font-size: 19px; margin-bottom: 8px; }

  /* teaching tip becomes a card pinned to the bottom of the casebook */
  .redact-tip {
    position: fixed;
    left: 12px; right: 12px; bottom: 12px;
    top: auto;
    width: auto;
    transform: translateY(8px);
    font-size: 15px;
    padding: 13px 16px;
    box-shadow: 0 -4px 24px rgba(0, 0, 0, 0.45);
    z-index: 40;
  }
  .redact-tip::after { display: none; }
  .redact.revealed:hover .redact-tip,
  .redact.revealed:focus .redact-tip,
  .redact.just-revealed .redact-tip { transform: translateY(0); }

  /* full-width actions */
  .case-cta-row { flex-direction: column; align-items: stretch; gap: 12px; }
  .case-cta-row .cta-btn { width: 100%; }
  .case-cta-row .cta-link { text-align: center; }
  .practice-reveal-btn { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  .casebook { transition: opacity 0.2s ease; transform: none; opacity: 0; }
  .casebook-overlay.open .casebook { transform: none; opacity: 1; }
  .casebook-cover { display: none; }
  .casebook.open-done .case-stamp, .casebook.swap-done .case-stamp { animation: none; opacity: 1; }
  .casebook.open-done .case-margin-note, .casebook.swap-done .case-margin-note { animation: none; opacity: 0.92; transform: none; }
  .redact.revealed { animation: none; }
  .case-body.curling::after { animation: none; }
  .case-sigil img { animation: none; }
}