:root {
  --ink: #122033;
  --muted: #5b6b7c;
  --line: #d9e0e8;
  --paper: #f7f4ee;
  --card: #fffdf8;
  --navy: #16324f;
  --navy-deep: #0e2238;
  --red: #b42318;
  --green: #1f7a4d;
  --gold: #c9a227;
  --shadow: 0 16px 40px rgba(16, 32, 51, 0.08);
  --radius: 18px;
}

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  font-family: "Iowan Old Style", "Palatino Linotype", Palatino, "Times New Roman", serif;
  background:
    radial-gradient(1200px 500px at 10% -10%, rgba(201, 162, 39, 0.12), transparent 50%),
    linear-gradient(180deg, #f3efe6 0%, var(--paper) 40%, #eef3f7 100%);
  color: var(--ink);
}

button, input, select, textarea {
  font: inherit;
}

a { color: var(--navy); }

.app {
  max-width: 920px;
  margin: 0 auto;
  padding: 24px 16px 80px;
}

.top {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: flex-start;
  margin-bottom: 20px;
}

.brand h1 {
  margin: 0;
  font-size: 1.7rem;
  letter-spacing: 0.01em;
}

.brand p {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.version-switch {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.version-switch button {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--ink);
  padding: 7px 14px;
  border-radius: 999px;
  cursor: pointer;
  font-size: 0.92rem;
}

.version-switch button.active {
  background: var(--navy);
  color: #fff;
  border-color: var(--navy);
}

.focus-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 3px rgba(201, 162, 39, 0.28);
  flex: 0 0 auto;
}

.version-switch button.active .focus-dot {
  background: #f4d56a;
  box-shadow: 0 0 0 3px rgba(244, 213, 106, 0.35);
}

.focus-note {
  margin: 0 0 14px;
  padding: 10px 12px;
  border-radius: 12px;
  background: #f8f1dc;
  border: 1px solid #ead9a4;
}

.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.nav button, .ghost, .primary, .danger {
  border: 1px solid var(--line);
  background: var(--card);
  color: var(--ink);
  padding: 8px 14px;
  border-radius: 999px;
  cursor: pointer;
}

.nav button.active, .primary {
  background: var(--navy);
  color: #fff;
  border-color: var(--navy);
}

.danger { color: var(--red); }

.panel, .card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.panel { padding: 20px; margin-bottom: 16px; }

.rules {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px;
}

.rule {
  padding: 12px 14px;
  border-radius: 12px;
  background: #f3f7fb;
}

.rule strong { display: block; font-size: 1.05rem; }
.rule span { color: var(--muted); font-size: 0.9rem; }

.structure h2 { margin: 0 0 8px; font-size: 1.35rem; }
.structure-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 12px;
  margin: 16px 0;
}
.structure-block {
  padding: 14px 16px;
  border-radius: 12px;
  background: #f3f7fb;
}
.structure-block h3 { margin: 0 0 8px; font-size: 1.05rem; }
.structure-block ul { margin: 0; padding-left: 18px; }
.structure-block li { margin: 6px 0; }
.meta-line { color: var(--muted); font-size: 0.92rem; }

.toolbar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 16px;
}

.card {
  padding: 28px 24px;
  min-height: 280px;
}

.need-banner {
  display: inline-block;
  margin: 0 0 14px;
  padding: 8px 14px;
  border-radius: 999px;
  background: #16324f;
  color: #fff;
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.need-multi {
  background: #b42318;
}

.meta {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  color: var(--muted);
  font-size: 0.88rem;
  margin-bottom: 12px;
}

.star { color: var(--gold); font-weight: 700; }

.prompt-row {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin: 0 0 20px;
}

.prompt {
  font-size: 1.55rem;
  line-height: 1.35;
  margin: 0;
  flex: 1;
}

.info-btn {
  flex: 0 0 auto;
  width: 32px;
  height: 32px;
  margin-top: 4px;
  border: 1.5px solid var(--navy);
  border-radius: 50%;
  background: #fff;
  color: var(--navy);
  font-family: Georgia, "Iowan Old Style", serif;
  font-size: 1.05rem;
  font-style: italic;
  font-weight: 700;
  line-height: 1;
  cursor: pointer;
  padding: 0;
}

.info-btn:hover,
.info-btn:focus-visible {
  background: var(--navy);
  color: #fff;
  outline: none;
}

.modal {
  position: fixed;
  inset: 0;
  z-index: 40;
  display: grid;
  place-items: center;
  padding: 20px;
}

.modal.hidden {
  display: none;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(14, 34, 56, 0.45);
}

.modal-card {
  position: relative;
  z-index: 1;
  width: min(520px, 100%);
  max-height: min(80vh, 640px);
  overflow: auto;
  padding: 28px 28px 26px;
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: 0 24px 60px rgba(14, 34, 56, 0.28);
  border: 1px solid var(--line);
}

.modal-kicker {
  margin: 0 0 6px;
  color: var(--gold);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.modal-card h2 {
  margin: 0 0 12px;
  font-size: 1.2rem;
  line-height: 1.35;
}

.modal-card p#context-body {
  margin: 0;
  color: var(--ink);
  line-height: 1.5;
}

.modal-close {
  position: absolute;
  top: 10px;
  right: 12px;
  width: 36px;
  height: 36px;
  border: 0;
  background: transparent;
  color: var(--muted);
  font-size: 1.6rem;
  line-height: 1;
  cursor: pointer;
  border-radius: 8px;
}

.modal-close:hover {
  color: var(--ink);
  background: #f3f7fb;
}

.answers { margin: 0; padding-left: 20px; }
.answers li { margin: 8px 0; }

.accepted {
  padding: 14px 16px;
  border-radius: 12px;
  background: #edf8f1;
  border: 1px solid #c8e4d2;
}

.accepted-label {
  margin: 0 0 8px;
  color: var(--green);
  font-size: 0.92rem;
}

.choices { display: grid; gap: 10px; }

.choice {
  text-align: left;
  width: 100%;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: #fff;
  cursor: pointer;
}

.choice.selected { border-color: var(--navy); box-shadow: inset 0 0 0 1px var(--navy); }
.choice.correct { border-color: var(--green); background: #edf8f1; }
.choice.wrong { border-color: var(--red); background: #fdeeee; }

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 20px;
}

.pager {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 22px;
}

.pager:has(> :only-child) {
  grid-template-columns: 1fr;
}

.pager-btn {
  width: 100%;
  padding: 16px 18px;
  border: 0;
  border-radius: 16px;
  background: var(--navy);
  color: #fff;
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  cursor: pointer;
  box-shadow: 0 10px 0 var(--navy-deep), 0 16px 24px rgba(14, 34, 56, 0.28);
  transform: translateY(-2px);
}

.pager-btn:hover:not(:disabled) {
  background: #1c4064;
  transform: translateY(-4px);
}

.pager-btn:active:not(:disabled) {
  transform: translateY(6px);
  box-shadow: 0 2px 0 var(--navy-deep);
}

.pager-next {
  background: #b42318;
  box-shadow: 0 10px 0 #7d1610, 0 16px 24px rgba(180, 35, 24, 0.28);
}

.pager-next:hover:not(:disabled) {
  background: #c52b1f;
}

.pager-next:active:not(:disabled) {
  box-shadow: 0 2px 0 #7d1610;
}

.pager-btn:disabled {
  opacity: 0.35;
  cursor: default;
  transform: none;
  box-shadow: 0 4px 0 var(--navy-deep);
}

.progress-bar {
  height: 8px;
  background: #e6ebf0;
  border-radius: 99px;
  overflow: hidden;
  margin: 8px 0 16px;
}

.progress-bar > span {
  display: block;
  height: 100%;
  background: var(--navy);
}

.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 10px;
}

.stat {
  padding: 14px;
  border-radius: 12px;
  background: #f3f7fb;
}

.stat b { display: block; font-size: 1.4rem; }

.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 12px;
}

label { display: block; font-size: 0.92rem; color: var(--muted); }
input, select {
  width: 100%;
  margin-top: 4px;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: #fff;
}

.result {
  text-align: center;
  padding: 28px 12px;
}

.result h2 { margin: 0 0 8px; font-size: 2rem; }
.pass { color: var(--green); }
.fail { color: var(--red); }

.hidden { display: none; }

body.modal-open { overflow: hidden; }

.list {
  display: grid;
  gap: 8px;
}

.list button {
  text-align: left;
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: #fff;
  cursor: pointer;
}

@media (max-width: 680px) {
  .top { flex-direction: column; }
  .prompt { font-size: 1.28rem; }
  .card { padding: 20px 16px; }
}