/* AP CSP Vocabulary, Spring 2027 */

@font-face {
  font-family: "Bodoni Moda";
  src: url("fonts/bodoni-moda-latin-opsz.woff2") format("woff2-variations"),
       url("fonts/bodoni-moda-latin-opsz.woff2") format("woff2");
  font-weight: 400 900;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Atkinson Hyperlegible";
  src: url("fonts/atkinson-hyperlegible-latin-400-normal.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "Atkinson Hyperlegible";
  src: url("fonts/atkinson-hyperlegible-latin-700-normal.woff2") format("woff2");
  font-weight: 700;
  font-style: normal;
  font-display: swap;
}

:root {
  --color-black: #000000;
  --color-tan: #86745c;
  --color-light-tan: #c2baab;
  --color-dark-tan: #6a5c48;
  --color-white: #ffffff;
  --color-black-63: rgba(0, 0, 0, 0.63);
  --color-black-80: rgba(0, 0, 0, 0.8);
  --color-black-88: rgba(0, 0, 0, 0.88);
  --color-gold: #b19977;
  --color-accent: #b19977;
  --color-accent-light: #c2baab;

  /* Supporting tokens built only from the palette above */
  --rule: var(--color-dark-tan);
  --gold-wash: rgba(177, 153, 119, 0.14);
  --tan-wash: rgba(106, 92, 72, 0.35);

  --font-display: "Bodoni Moda", "Bodoni 72", "Didot", "Times New Roman", serif;
  --font-body: "Atkinson Hyperlegible", "Segoe UI", system-ui, -apple-system, Roboto, sans-serif;

  --radius: 3px;
  --measure: 66ch;
  --gutter: clamp(1rem, 4vw, 2.5rem);
  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
}

*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--color-black);
  color: var(--color-light-tan);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, p { margin: 0; }
button, input, select { font: inherit; color: inherit; }
[hidden] { display: none !important; }

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0);
  white-space: nowrap; border: 0;
}

.skip-link {
  position: absolute;
  left: 1rem; top: -4rem;
  z-index: 10;
  padding: 0.6rem 1rem;
  background: var(--color-gold);
  color: var(--color-black);
  font-weight: 700;
  border-radius: var(--radius);
  text-decoration: none;
}
.skip-link:focus { top: 1rem; }

:focus-visible {
  outline: 3px solid var(--color-white);
  outline-offset: 3px;
}
main:focus { outline: none; }

.wrap {
  max-width: 76rem;
  margin: 0 auto;
  padding: clamp(1.5rem, 4vw, 3rem) var(--gutter) 2rem;
}

/* ---------------- Masthead ---------------- */

.masthead {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem 2rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--rule);
}

h1 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(2.25rem, 6vw, 4.25rem);
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--color-white);
}

.semester {
  margin-top: 0.5rem;
  color: var(--color-gold);
  font-size: 1.0625rem;
}

.overall {
  color: var(--color-light-tan);
  text-align: right;
}
.overall-num {
  font-family: var(--font-display);
  font-size: 2.25rem;
  font-weight: 500;
  line-height: 1;
  color: var(--color-gold);
  font-variant-numeric: lining-nums tabular-nums;
}

/* ---------------- Pacing strip (the signature element) ---------------- */

.pacing { margin-top: 1.75rem; }

.pacing-hint {
  font-size: 0.9375rem;
  color: var(--color-light-tan);
  margin-bottom: 0.75rem;
}

.pacing-scroll {
  overflow-x: auto;
  overscroll-behavior-x: contain;
  scrollbar-width: thin;
  scrollbar-color: var(--color-dark-tan) transparent;
  /* room for focus outlines */
  padding: 4px 4px 6px;
  margin: -4px -4px 0;
}

.pacing-strip {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1.5fr repeat(16, minmax(2.75rem, 1fr));
  gap: 0.375rem;
  min-width: 46rem;
}

.pacing-cell.is-all { padding-right: 0.5rem; border-right: 1px solid var(--rule); }
.pacing-cell.is-review { padding-left: 0.5rem; border-left: 1px solid var(--rule); }

.week-btn {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 0.45rem;
  width: 100%;
  padding: 0;
  background: none;
  border: 0;
  cursor: pointer;
  text-align: center;
}

.week-bar {
  position: relative;
  display: block;
  height: clamp(4.5rem, 9vw, 6.5rem);
  background: var(--tan-wash);
  border-radius: 2px;
  overflow: hidden;
}

.week-fill {
  position: absolute;
  inset: 0;
  background: var(--color-gold);
  transform-origin: bottom;
  transform: scaleY(var(--fill, 0));
  transition: transform 0.5s var(--ease);
}

.week-num {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 500;
  line-height: 1.1;
  color: var(--color-light-tan);
  font-variant-numeric: lining-nums;
}
.is-all .week-num { font-family: var(--font-body); font-size: 1rem; font-weight: 700; }

.week-now {
  font-size: 0.8125rem;
  color: var(--color-gold);
  line-height: 1;
}

.week-btn:hover .week-bar { background: rgba(134, 116, 92, 0.45); }
.week-btn:hover .week-num { color: var(--color-white); }

.week-btn[aria-pressed="true"] .week-bar {
  box-shadow: inset 0 0 0 2px var(--color-white);
}
.week-btn[aria-pressed="true"] .week-num { color: var(--color-white); font-weight: 700; }
.week-btn.is-complete .week-num { color: var(--color-gold); }
.week-btn.is-complete[aria-pressed="true"] .week-num { color: var(--color-white); }

/* ---------------- Week introduction ---------------- */

.week-intro {
  padding: clamp(1.75rem, 4vw, 2.75rem) 0 1.5rem;
  max-width: var(--measure);
}

.week-kicker { color: var(--color-gold); font-size: 1rem; }

.week-title {
  margin-top: 0.35rem;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(1.9rem, 4.6vw, 3.25rem);
  line-height: 1.08;
  color: var(--color-white);
  text-wrap: balance;
}

.week-unit { margin-top: 0.6rem; }
.week-stats { margin-top: 0.15rem; color: var(--color-white); }

/* ---------------- Toolbar, tabs, fields ---------------- */

.toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1rem 2rem;
  border-bottom: 1px solid var(--rule);
}

.tabs { display: flex; flex-wrap: wrap; gap: 0 1.75rem; }

.tabs [role="tab"] {
  position: relative;
  padding: 0.6rem 0 0.85rem;
  background: none;
  border: 0;
  color: var(--color-light-tan);
  font-size: 1.0625rem;
  cursor: pointer;
}
.tabs [role="tab"]:hover { color: var(--color-white); }
.tabs [role="tab"][aria-selected="true"] { color: var(--color-white); font-weight: 700; }
.tabs [role="tab"][aria-selected="true"]::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -1px;
  height: 3px;
  background: var(--color-gold);
}

.field { display: flex; flex-direction: column; gap: 0.3rem; }
.field label, legend { font-size: 0.9375rem; color: var(--color-light-tan); }

.category-field { padding-bottom: 0.75rem; min-width: min(20rem, 100%); }

select, input[type="search"] {
  width: 100%;
  min-height: 2.75rem;
  padding: 0.5rem 0.75rem;
  background: var(--color-black);
  color: var(--color-white);
  border: 1px solid var(--color-tan);
  border-radius: var(--radius);
}
select {
  appearance: none;
  padding-right: 2.25rem;
  background-image: linear-gradient(45deg, transparent 50%, var(--color-gold) 50%),
                    linear-gradient(135deg, var(--color-gold) 50%, transparent 50%);
  background-position: right 1.05rem center, right 0.7rem center;
  background-size: 0.35rem 0.35rem;
  background-repeat: no-repeat;
}
select option { background: var(--color-black); color: var(--color-white); }
input[type="search"]::-webkit-search-cancel-button { filter: invert(0.8); }
select:hover, input[type="search"]:hover { border-color: var(--color-gold); }

fieldset { margin: 0; padding: 0; border: 0; min-width: 0; }
legend { padding: 0; margin-bottom: 0.3rem; }

.segmented > label {
  display: inline-flex;
  margin: 0 0.35rem 0.35rem 0;
  cursor: pointer;
}
.segmented input {
  position: absolute;
  opacity: 0;
  width: 1px; height: 1px;
}
.segmented span {
  display: inline-flex;
  align-items: center;
  min-height: 2.75rem;
  padding: 0.45rem 0.9rem;
  border: 1px solid var(--color-tan);
  border-radius: var(--radius);
  color: var(--color-light-tan);
}
.segmented label:hover span { border-color: var(--color-gold); color: var(--color-white); }
.segmented input:checked + span {
  background: var(--color-gold);
  border-color: var(--color-gold);
  color: var(--color-black);
  font-weight: 700;
}
.segmented input:focus-visible + span { outline: 3px solid var(--color-white); outline-offset: 2px; }

.check {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  min-height: 2.75rem;
  cursor: pointer;
}
.check input {
  width: 1.25rem; height: 1.25rem;
  margin: 0;
  accent-color: var(--color-gold);
  cursor: pointer;
}

/* ---------------- Buttons ---------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.75rem;
  padding: 0.5rem 1.15rem;
  border-radius: var(--radius);
  border: 1px solid transparent;
  font-weight: 700;
  cursor: pointer;
  text-align: center;
}
.btn:disabled { cursor: not-allowed; opacity: 0.5; }
.btn-primary { background: var(--color-gold); color: var(--color-black); }
.btn-primary:not(:disabled):hover { background: var(--color-light-tan); }
.btn-secondary { background: transparent; border-color: var(--color-gold); color: var(--color-white); }
.btn-secondary:not(:disabled):hover { background: var(--gold-wash); }
.btn-quiet { background: transparent; border-color: var(--color-tan); color: var(--color-light-tan); font-weight: 400; }
.btn-quiet:not(:disabled):hover { border-color: var(--color-light-tan); color: var(--color-white); }
.btn-large { min-height: 3.25rem; padding: 0.75rem 1.75rem; font-size: 1.125rem; }
.btn-small { min-height: 2.25rem; padding: 0.3rem 0.8rem; font-size: 0.9375rem; }

kbd {
  display: inline-block;
  padding: 0 0.4em;
  border: 1px solid var(--color-tan);
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-size: 0.875em;
  color: var(--color-white);
}

/* ---------------- Panels ---------------- */

main { display: block; min-height: 24rem; }
.panel { padding-top: 1.75rem; }

.panel-controls {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  gap: 1rem 1.5rem;
  margin-bottom: 1.25rem;
}
.search-field { flex: 1 1 18rem; max-width: 28rem; }

.panel-heading {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.75rem;
  line-height: 1.15;
  color: var(--color-white);
  margin-bottom: 0.75rem;
}
.panel-heading:focus { outline: none; }
.subheading { font-size: 1.125rem; color: var(--color-white); margin: 2rem 0 0.75rem; }

.result-count { font-size: 0.9375rem; margin-bottom: 0.25rem; }

.empty, .notice {
  max-width: var(--measure);
  padding: 2rem 0;
  color: var(--color-white);
}
.empty p { margin-bottom: 1rem; }
.empty-inline { color: var(--color-light-tan); }

/* ---------------- Term list ---------------- */

.term-list { list-style: none; margin: 0; padding: 0; }

.entry {
  display: grid;
  grid-template-columns: minmax(10rem, 17rem) minmax(0, 1fr) auto;
  gap: 0.35rem 2rem;
  align-items: baseline;
  padding: 1.15rem 0;
  border-bottom: 1px solid var(--rule);
}

.entry-term {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 1.5rem;
  line-height: 1.15;
  color: var(--color-white);
  overflow-wrap: anywhere;
}
.entry.is-mastered .entry-term { color: var(--color-gold); }

.entry-def { color: var(--color-white); max-width: var(--measure); }
.entry-meta { margin-top: 0.2rem; font-size: 0.9375rem; color: var(--color-light-tan); }
.entry-check { align-self: center; font-size: 0.9375rem; }

/* ---------------- Flashcards ---------------- */

.deck { max-width: 48rem; }
.deck-position { margin-bottom: 0.75rem; color: var(--color-light-tan); }

.card {
  display: block;
  width: 100%;
  padding: 0;
  border: 0;
  background: none;
  cursor: pointer;
  perspective: 1600px;
  text-align: center;
}

.card-inner {
  position: relative;
  display: block;
  min-height: clamp(16rem, 42vw, 22rem);
  transform-style: preserve-3d;
  transition: transform 0.55s var(--ease);
}
.card.is-flipped .card-inner { transform: rotateY(180deg); }

.card-face {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  padding: 3rem clamp(1.25rem, 5vw, 3.5rem);
  background: var(--color-black);
  border: 1px solid var(--color-tan);
  border-radius: var(--radius);
  outline: 1px solid var(--rule);
  outline-offset: -10px;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
}
.card-back { transform: rotateY(180deg); }
.card:hover .card-face { border-color: var(--color-gold); }
.card.is-mastered .card-face { border-color: var(--color-gold); }

.card-meta {
  position: absolute;
  top: 1.35rem; left: 1.5rem; right: 1.5rem;
  font-size: 0.875rem;
  color: var(--color-light-tan);
}
.card-cue {
  position: absolute;
  bottom: 1.25rem; left: 0; right: 0;
  font-size: 0.875rem;
  color: var(--color-light-tan);
}

.card-text { color: var(--color-white); max-width: 34ch; text-wrap: balance; }
.card-face.is-term .card-text {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(2.25rem, 7vw, 4.5rem);
  line-height: 1.05;
  overflow-wrap: anywhere;
}
.card-face.is-def .card-text {
  font-size: clamp(1.25rem, 3vw, 1.6rem);
  line-height: 1.45;
}

.deck-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 1.25rem;
}
.deck-actions #next-btn { margin-left: auto; }
#mastered-btn[aria-pressed="true"] { box-shadow: inset 0 0 0 2px var(--color-black); }

.shortcuts { margin-top: 1rem; font-size: 0.875rem; color: var(--color-light-tan); }

/* ---------------- Practice test ---------------- */

.test-setup { max-width: var(--measure); display: grid; gap: 1.5rem; justify-items: start; }
.test-scope { color: var(--color-white); }
.best-score { color: var(--color-gold); }
.best-score:empty { display: none; }

.test-run { max-width: 52rem; }
.test-progress { display: flex; align-items: center; gap: 1rem; margin-bottom: 1.25rem; }
.test-progress p { flex: none; color: var(--color-light-tan); }
.test-progress .meter { flex: 1; }

.meter {
  position: relative;
  height: 6px;
  background: var(--tan-wash);
  border-radius: 3px;
  overflow: hidden;
}
.meter-fill {
  position: absolute;
  inset: 0;
  background: var(--color-gold);
  transform-origin: left;
  transform: scaleX(var(--fill, 0));
  transition: transform 0.4s var(--ease);
}

.question-prompt { font-size: 1.0625rem; font-weight: 400; color: var(--color-light-tan); }
.question-prompt:focus { outline: none; }

.question-subject {
  margin: 0.5rem 0 1.5rem;
  color: var(--color-white);
  max-width: var(--measure);
}
.question-subject.is-def { font-size: clamp(1.3rem, 3vw, 1.65rem); line-height: 1.4; }
.question-subject.is-term {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(2rem, 6vw, 3.25rem);
  line-height: 1.08;
}

.options { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.6rem; }

.option {
  display: grid;
  grid-template-columns: 2rem 1fr;
  gap: 0.25rem 0.75rem;
  align-items: baseline;
  width: 100%;
  min-height: 3.25rem;
  padding: 0.8rem 1rem;
  background: transparent;
  border: 1px solid var(--color-tan);
  border-radius: var(--radius);
  color: var(--color-white);
  text-align: left;
  cursor: pointer;
}
.option:not(:disabled):hover { border-color: var(--color-gold); background: var(--gold-wash); }
.option:disabled { cursor: default; }
.option-key {
  font-family: var(--font-display);
  font-size: 1.15rem;
  color: var(--color-gold);
}
.option.is-term .option-text { font-family: var(--font-display); font-weight: 500; font-size: 1.35rem; line-height: 1.2; }
.option-tag { grid-column: 2; font-size: 0.9375rem; font-weight: 700; }

.option:disabled:not(.is-correct):not(.is-wrong) { opacity: 0.55; }
.option.is-correct { border: 2px solid var(--color-gold); background: var(--gold-wash); }
.option.is-correct .option-tag { color: var(--color-gold); }
.option.is-wrong { border: 2px dashed var(--color-light-tan); }
.option.is-wrong .option-tag { color: var(--color-light-tan); }

.feedback { margin-top: 1.25rem; max-width: var(--measure); color: var(--color-white); min-height: 1.5em; }
.feedback.is-right::before { content: "\2713  "; color: var(--color-gold); }
.feedback.is-wrong::before { content: "\2717  "; color: var(--color-light-tan); }

.test-actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 1.25rem; justify-content: space-between; }

.test-results { max-width: var(--measure); }
.score {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(2.25rem, 7vw, 4rem);
  line-height: 1.05;
  color: var(--color-gold);
  font-variant-numeric: lining-nums;
}
.score-pct {
  font-family: var(--font-body);
  font-size: 0.45em;
  font-weight: 700;
  vertical-align: 0.35em;
  color: var(--color-light-tan);
}
.score-note { margin-top: 0.5rem; color: var(--color-white); }
.results-actions { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-top: 1.5rem; }

.review-list { list-style: none; margin: 0; padding: 0; }
.review-list li { padding: 0.85rem 0; border-bottom: 1px solid var(--rule); }
.review-term { font-family: var(--font-display); font-weight: 500; font-size: 1.35rem; color: var(--color-white); }
.review-def { color: var(--color-light-tan); }

/* ---------------- Progress ---------------- */

.progress-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  gap: 2.5rem 4rem;
}
.progress-grid > section > .panel-heading:not(:first-child) { margin-top: 2.5rem; }

.progress-rows { list-style: none; margin: 0 0 0.5rem; padding: 0; }
.progress-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(4rem, 7rem) 3.75rem auto;
  align-items: center;
  gap: 0.75rem;
  padding: 0.55rem 0;
  border-bottom: 1px solid var(--rule);
}
.progress-label { display: flex; flex-direction: column; min-width: 0; }
.progress-name { color: var(--color-white); }
.progress-sub { font-size: 0.875rem; color: var(--color-light-tan); }
.progress-count { text-align: right; font-variant-numeric: tabular-nums; font-size: 0.9375rem; }

.table-scroll { overflow-x: auto; }
.history { width: 100%; border-collapse: collapse; font-size: 0.9375rem; }
.history th, .history td { padding: 0.55rem 0.5rem 0.55rem 0; text-align: left; border-bottom: 1px solid var(--rule); vertical-align: top; }
.history th { font-weight: 700; color: var(--color-white); }
.history td.num { white-space: nowrap; font-variant-numeric: tabular-nums; }

.reset-note { margin-bottom: 0.75rem; font-size: 0.9375rem; }
.reset-actions { display: flex; flex-wrap: wrap; gap: 0.75rem; }

/* ---------------- Footer ---------------- */

.footer {
  margin-top: 4rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--rule);
  font-size: 0.875rem;
}
.footer .warn { color: var(--color-white); }

/* ---------------- Responsive ---------------- */

@media (max-width: 60rem) {
  .progress-grid { grid-template-columns: 1fr; }
}

@media (max-width: 46rem) {
  .overall { text-align: left; }
  .entry { grid-template-columns: 1fr; gap: 0.35rem; }
  .entry-check { justify-self: start; }
  .tabs { flex-wrap: nowrap; gap: 0 1rem; width: 100%; overflow-x: auto; scrollbar-width: none; }
  .tabs::-webkit-scrollbar { display: none; }
  .tabs [role="tab"] { flex: none; font-size: 1rem; white-space: nowrap; }
  .category-field { width: 100%; }
  .deck-actions .btn { flex: 1 1 calc(50% - 0.6rem); }
  .deck-actions #next-btn { margin-left: 0; }
  .shortcuts { display: none; }
  .progress-row { grid-template-columns: minmax(0, 1fr) 3.5rem auto; }
  .progress-row .meter { grid-column: 1 / -1; grid-row: 2; }
  .results-actions .btn, .test-setup .btn-large { width: 100%; }
}

@media (hover: none) {
  .shortcuts { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
  /* Swap the 3D flip for a plain swap of faces */
  .card-inner, .card.is-flipped .card-inner { transform: none; }
  .card-back { transform: none; visibility: hidden; }
  .card.is-flipped .card-back { visibility: visible; }
  .card.is-flipped .card-front { visibility: hidden; }
}

@media (forced-colors: active) {
  .week-fill, .meter-fill { background: Highlight; }
  .week-btn[aria-pressed="true"] .week-bar { outline: 2px solid ButtonText; }
}