:root {
  --ink: #0e1a14;
  --ink-soft: #2a3d32;
  --paper: #f3f6f2;
  --paper-elevated: #fafcf9;
  --green: #0d6b45;
  --green-deep: #084830;
  --green-bright: #1a9a62;
  --mint: #c8e6d5;
  --amber: #c4781a;
  --line: rgba(14, 26, 20, 0.12);
  --shadow: 0 18px 50px rgba(8, 40, 28, 0.14);
  --radius: 14px;
  --nav-h: 4.25rem;
  --mobile-nav-h: 4.25rem;
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --page-pad-x: clamp(0.85rem, 3vw, 1.5rem);
  /* 中文：使用微軟黑體（JhengHei）；英文/拉丁字：使用 Noto Sans */
  --font-sans-zh: "Microsoft JhengHei", "STHeiti", "Heiti TC", "SimHei",
    "PingFang TC", sans-serif;
  --font-sans-en: "Noto Sans", "Helvetica Neue", Arial, sans-serif;
  --font-sans: var(--font-sans-zh);
  --font-serif: var(--font-sans-zh);
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  min-height: 100dvh;
  font-family: var(--font-sans);
  color: var(--ink);
  background:
    radial-gradient(1200px 600px at 10% -10%, rgba(26, 154, 98, 0.18), transparent 55%),
    radial-gradient(900px 500px at 100% 0%, rgba(196, 120, 26, 0.1), transparent 50%),
    linear-gradient(165deg, #e8f0ea 0%, var(--paper) 42%, #e4ebe6 100%);
  line-height: 1.65;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

.latin {
  font-family: var(--font-sans-en);
  font-weight: inherit;
}

img,
video {
  max-width: 100%;
  display: block;
}

a {
  color: var(--green);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--green-deep);
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -3rem;
  z-index: 100;
  padding: 0.5rem 0.85rem;
  background: var(--ink);
  color: #fff;
  border-radius: 8px;
  transition: top 0.2s var(--ease);
}

.skip-link:focus {
  top: 0.75rem;
}

/* —— Site header —— */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  min-height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding:
    calc(0.55rem + var(--safe-top))
    clamp(1rem, 3vw, 2.5rem)
    0.55rem;
  background: rgba(243, 246, 242, 0.9);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: inherit;
  text-decoration: none;
  min-width: 0;
}

.brand-mark {
  width: 2.35rem;
  height: 2.35rem;
  border-radius: 50%;
  background:
    radial-gradient(circle at 35% 30%, #2ecf84, var(--green-deep) 70%);
  box-shadow: inset 0 0 0 2px rgba(255, 255, 255, 0.35);
  flex-shrink: 0;
  position: relative;
}

.brand-mark::after {
  content: "+";
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  color: #fff;
  font-weight: 700;
  font-size: 1.25rem;
  line-height: 1;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
  min-width: 0;
}

.brand-text strong {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.brand-text span {
  font-size: 0.72rem;
  color: var(--ink-soft);
  opacity: 0.85;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
  justify-content: flex-end;
}

.site-nav button {
  appearance: none;
  border: 0;
  background: transparent;
  font: inherit;
  font-size: 0.9rem;
  color: var(--ink-soft);
  padding: 0.55rem 0.85rem;
  min-height: 2.5rem;
  border-radius: 999px;
  cursor: pointer;
  transition: background 0.2s var(--ease), color 0.2s var(--ease);
}

.site-nav button:hover {
  background: rgba(13, 107, 69, 0.08);
  color: var(--green-deep);
}

.site-nav button[aria-current="page"] {
  background: var(--green);
  color: #fff;
  font-weight: 600;
}

/* Mobile bottom nav — hidden on desktop */
.mobile-nav {
  display: none;
}

/* —— Layout —— */
.page {
  width: min(1100px, calc(100% - (var(--page-pad-x) * 2)));
  margin: 0 auto;
  padding: 1.75rem 0 4.5rem;
}

.section {
  display: none;
  animation: rise 0.45s var(--ease);
}

.section.is-active {
  display: block;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.section-head {
  margin-bottom: 1.75rem;
}

.section-head .eyebrow {
  display: inline-block;
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--green);
  font-weight: 700;
  margin-bottom: 0.4rem;
}

.section-head h1 {
  margin: 0 0 0.5rem;
  font-family: var(--font-serif);
  font-size: clamp(1.85rem, 4vw, 2.55rem);
  font-weight: 700;
  letter-spacing: 0.01em;
  line-height: 1.25;
}

.section-head p {
  margin: 0;
  max-width: 40rem;
  color: var(--ink-soft);
  font-size: 1.02rem;
}

/* —— Intro panel (home-like first section cue) —— */
.hero-strip {
  display: grid;
  gap: 1.25rem;
  margin-bottom: 2rem;
  padding: 1.5rem 1.6rem;
  border-radius: var(--radius);
  background:
    linear-gradient(135deg, rgba(8, 72, 48, 0.94), rgba(13, 107, 69, 0.88)),
    var(--green-deep);
  color: #f4faf6;
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
}

.hero-strip::before {
  content: "";
  position: absolute;
  right: -8%;
  top: -40%;
  width: 280px;
  height: 280px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.16), transparent 68%);
  pointer-events: none;
}

.hero-strip h2 {
  margin: 0;
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 3vw, 2rem);
  position: relative;
}

.hero-strip p {
  margin: 0.4rem 0 0;
  opacity: 0.88;
  max-width: 36rem;
  position: relative;
}

.disclaimer {
  margin-top: 1rem;
  padding: 0.85rem 1rem;
  border-left: 3px solid var(--amber);
  background: rgba(196, 120, 26, 0.08);
  border-radius: 0 10px 10px 0;
  font-size: 0.88rem;
  color: var(--ink-soft);
}

/* —— CPR —— */
.cpr-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.cpr-tabs button {
  appearance: none;
  border: 1px solid var(--line);
  background: var(--paper-elevated);
  font: inherit;
  font-size: 0.92rem;
  padding: 0.55rem 1rem;
  border-radius: 999px;
  cursor: pointer;
  color: var(--ink-soft);
  transition: border-color 0.2s, background 0.2s, color 0.2s;
}

.cpr-tabs button:hover {
  border-color: var(--green-bright);
}

.cpr-tabs button[aria-selected="true"] {
  background: var(--green);
  border-color: var(--green);
  color: #fff;
  font-weight: 600;
}

.media-frame {
  border-radius: calc(var(--radius) + 2px);
  overflow: hidden;
  background: #06140e;
  box-shadow: var(--shadow);
  aspect-ratio: 16 / 9;
}

.media-frame video {
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #000;
}

.media-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-top: 0.85rem;
  font-size: 0.9rem;
  color: var(--ink-soft);
}

.btn-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-weight: 600;
}

/* —— Scenarios —— */
.scenario-layout {
  display: grid;
  grid-template-columns: minmax(0, 280px) minmax(0, 1fr);
  gap: 1.25rem;
  align-items: start;
}

.scenario-sidebar-label {
  display: none;
  margin: 0 0 0.55rem;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--green);
}

.scenario-picker {
  display: none;
  flex-direction: column;
  gap: 0.65rem;
  margin-bottom: 0.85rem;
}

.scenario-select-wrap {
  display: block;
  width: 100%;
}

.scenario-select-wrap select {
  width: 100%;
  appearance: none;
  font: inherit;
  font-size: 1rem;
  font-weight: 600;
  color: var(--ink);
  min-height: 3rem;
  padding: 0.75rem 2.5rem 0.75rem 0.9rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  background:
    #fff
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 16 16'%3E%3Cpath fill='%230d6b45' d='M4.5 6.5L8 10l3.5-3.5'/%3E%3C/svg%3E")
    no-repeat right 0.85rem center;
  box-shadow: 0 6px 18px rgba(8, 40, 28, 0.06);
}

.scenario-select-wrap select:focus {
  outline: 2px solid rgba(13, 107, 69, 0.35);
  border-color: var(--green);
}

.scenario-picker-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.55rem;
}

.scenario-picker-nav .btn {
  width: 100%;
  min-height: 2.75rem;
}

.scenario-picker-nav .btn:disabled {
  opacity: 0.4;
  cursor: default;
}

.scenario-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  max-height: min(70vh, 640px);
  overflow: auto;
  padding-right: 0.25rem;
  -webkit-overflow-scrolling: touch;
}

.scenario-list button {
  width: 100%;
  text-align: left;
  appearance: none;
  border: 1px solid transparent;
  background: rgba(255, 255, 255, 0.55);
  border-radius: 12px;
  padding: 0.75rem 0.9rem;
  font: inherit;
  cursor: pointer;
  transition: border-color 0.2s, background 0.2s, transform 0.2s var(--ease);
  min-height: 3rem;
}

.scenario-list button:hover {
  background: #fff;
  border-color: var(--mint);
}

.scenario-list button[aria-current="true"] {
  background: #fff;
  border-color: var(--green);
  box-shadow: 0 8px 24px rgba(13, 107, 69, 0.1);
}

.scenario-list .sc-id {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--green);
  margin-bottom: 0.15rem;
}

.scenario-list .sc-title {
  display: block;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.35;
}

.scenario-list .sc-summary {
  display: block;
  margin-top: 0.2rem;
  font-size: 0.8rem;
  color: var(--ink-soft);
  line-height: 1.4;
}

.scenario-detail {
  background: var(--paper-elevated);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.35rem 1.4rem 1.5rem;
  box-shadow: 0 10px 30px rgba(8, 40, 28, 0.06);
  min-height: 320px;
}

.scenario-detail .empty-hint {
  color: var(--ink-soft);
  margin: 2rem 0;
  text-align: center;
}

.detail-top {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.detail-top h2 {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 1.45rem;
}

.time-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.3rem 0.7rem;
  border-radius: 999px;
  background: rgba(196, 120, 26, 0.12);
  color: #8a5208;
  font-size: 0.82rem;
  font-weight: 700;
}

.scene-box {
  padding: 1rem 1.1rem;
  background:
    linear-gradient(180deg, rgba(200, 230, 213, 0.35), rgba(200, 230, 213, 0.12));
  border-radius: 12px;
  border: 1px solid rgba(13, 107, 69, 0.12);
  margin-bottom: 1.15rem;
}

.scene-box h3 {
  margin: 0 0 0.45rem;
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--green);
}

.scene-box p {
  margin: 0;
  white-space: pre-wrap;
}

.detail-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-bottom: 1.15rem;
}

.btn {
  appearance: none;
  border: 0;
  font: inherit;
  font-weight: 600;
  font-size: 0.92rem;
  padding: 0.65rem 1.15rem;
  border-radius: 999px;
  cursor: pointer;
  transition: transform 0.15s var(--ease), box-shadow 0.2s, background 0.2s;
}

.btn:active {
  transform: scale(0.98);
}

.btn-primary {
  background: var(--green);
  color: #fff;
  box-shadow: 0 8px 20px rgba(13, 107, 69, 0.25);
}

.btn-primary:hover {
  background: var(--green-deep);
}

.btn-ghost {
  background: transparent;
  color: var(--ink-soft);
  border: 1px solid var(--line);
}

.btn-ghost:hover {
  border-color: var(--green);
  color: var(--green-deep);
}

.answers {
  display: none;
  flex-direction: column;
  gap: 1.1rem;
}

.answers.is-visible {
  display: flex;
  animation: rise 0.4s var(--ease);
}

.answer-card {
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1rem;
  background: #fff;
}

.answer-card h4 {
  margin: 0 0 0.35rem;
  font-size: 1.05rem;
  font-family: var(--font-serif);
}

.priority-badge {
  display: inline-block;
  margin-right: 0.35rem;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  background: rgba(196, 120, 26, 0.12);
  border: 1px solid rgba(196, 120, 26, 0.35);
  color: #8a5208;
  font-size: 0.78rem;
  font-weight: 800;
  vertical-align: middle;
}

.answer-card .technique {
  margin: 0 0 0.5rem;
  font-weight: 700;
  color: var(--green-deep);
}

.answer-card .notes {
  margin: 0 0 0.85rem;
  font-size: 0.92rem;
  color: var(--ink-soft);
}

.answer-card .media-frame {
  aspect-ratio: 16 / 9;
  box-shadow: none;
}

.answer-card .media-meta {
  margin-top: 0.55rem;
}

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

/* —— Quiz —— */
.quiz-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1rem;
  margin-bottom: 1.25rem;
}

.search-field {
  flex: 1 1 16rem;
  max-width: 28rem;
}

.search-field input {
  width: 100%;
  font: inherit;
  font-size: 0.95rem;
  padding: 0.65rem 0.9rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.75);
  color: var(--ink);
}

.search-field input:focus {
  outline: 2px solid rgba(13, 107, 69, 0.35);
  border-color: var(--green);
}

.quiz-stats {
  margin: 0;
  font-size: 0.88rem;
  color: var(--ink-soft);
}

.quiz-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.quiz-item {
  background: var(--paper-elevated);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.1rem 1.15rem;
}

.quiz-item.is-answered.is-correct {
  border-color: rgba(13, 107, 69, 0.45);
  box-shadow: 0 6px 18px rgba(13, 107, 69, 0.08);
}

.quiz-item.is-answered.is-wrong {
  border-color: rgba(180, 60, 40, 0.35);
}

.quiz-item-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem 0.75rem;
  margin-bottom: 0.65rem;
}

.quiz-num {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--green);
}

.quiz-question {
  margin: 0;
  font-size: 1.02rem;
  font-weight: 600;
  line-height: 1.55;
}

.quiz-options {
  display: grid;
  gap: 0.45rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.quiz-options button {
  width: 100%;
  text-align: left;
  appearance: none;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.65);
  border-radius: 10px;
  padding: 0.6rem 0.75rem;
  font: inherit;
  font-size: 0.94rem;
  cursor: pointer;
  color: var(--ink);
  transition: border-color 0.15s, background 0.15s;
}

.quiz-options button:hover:not(:disabled) {
  border-color: var(--green-bright);
  background: #fff;
}

.quiz-options button:disabled {
  cursor: default;
}

.quiz-options button.is-selected {
  font-weight: 700;
}

.quiz-options button.is-correct {
  border-color: var(--green);
  background: rgba(13, 107, 69, 0.12);
  color: var(--green-deep);
}

.quiz-options button.is-wrong {
  border-color: #b43c28;
  background: rgba(180, 60, 40, 0.1);
  color: #8a2415;
}

.quiz-feedback {
  display: none;
  margin-top: 0.75rem;
  padding-top: 0.75rem;
  border-top: 1px dashed var(--line);
  font-size: 0.9rem;
  color: var(--ink-soft);
}

.quiz-feedback.is-visible {
  display: block;
}

.quiz-feedback strong {
  color: var(--green-deep);
}

.quiz-pager {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  margin-top: 1.35rem;
}

.quiz-pager button {
  appearance: none;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.65);
  font: inherit;
  font-size: 0.88rem;
  min-width: 2.25rem;
  padding: 0.45rem 0.65rem;
  border-radius: 8px;
  cursor: pointer;
  color: var(--ink-soft);
}

.quiz-pager button:hover:not(:disabled) {
  border-color: var(--green);
  color: var(--green-deep);
}

.quiz-pager button:disabled {
  opacity: 0.45;
  cursor: default;
}

.quiz-pager button[aria-current="page"] {
  background: var(--green);
  border-color: var(--green);
  color: #fff;
  font-weight: 700;
}

.quiz-pager .pager-gap {
  padding: 0 0.15rem;
  color: var(--ink-soft);
  font-size: 0.85rem;
}

/* —— Mock exam —— */
.exam-intro {
  padding: 1.75rem 1.6rem;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--paper-elevated);
  box-shadow: 0 10px 30px rgba(8, 40, 28, 0.06);
}

.exam-intro h2 {
  margin: 0 0 0.75rem;
  font-size: 1.35rem;
}

.exam-intro ul {
  margin: 0 0 1.25rem;
  padding-left: 1.2rem;
  color: var(--ink-soft);
}

.exam-intro li + li {
  margin-top: 0.35rem;
}

.exam-bar {
  position: sticky;
  top: var(--nav-h);
  z-index: 40;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1rem;
  margin-bottom: 1.25rem;
  padding: 0.85rem 1rem;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid var(--line);
  box-shadow: 0 8px 24px rgba(8, 40, 28, 0.08);
  backdrop-filter: blur(10px);
}

.exam-bar.is-urgent {
  border-color: rgba(180, 60, 40, 0.45);
  background: rgba(255, 248, 245, 0.95);
}

.exam-timer {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--green-deep);
}

.exam-bar.is-urgent .exam-timer {
  color: #b43c28;
}

.exam-timer-label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--ink-soft);
}

.exam-progress-text {
  font-size: 0.88rem;
  color: var(--ink-soft);
}

.exam-progress-track {
  flex: 1 1 100%;
  height: 6px;
  border-radius: 999px;
  background: rgba(13, 107, 69, 0.12);
  overflow: hidden;
}

.exam-progress-fill {
  height: 100%;
  background: var(--green);
  border-radius: inherit;
  transition: width 0.3s var(--ease);
}

.exam-questions {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.exam-question {
  background: var(--paper-elevated);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.1rem 1.15rem;
}

.exam-question.is-unanswered {
  border-left: 3px solid var(--amber);
}

.exam-question-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0.5rem;
  margin-bottom: 0.55rem;
}

.exam-q-num {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--green);
}

.exam-q-text {
  margin: 0 0 0.75rem;
  font-weight: 600;
  line-height: 1.55;
}

.exam-options {
  display: grid;
  gap: 0.4rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.exam-options label {
  display: flex;
  align-items: flex-start;
  gap: 0.55rem;
  padding: 0.55rem 0.7rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.65);
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
}

.exam-options label:hover {
  border-color: var(--green-bright);
  background: #fff;
}

.exam-options input {
  margin-top: 0.2rem;
  accent-color: var(--green);
}

.exam-options label.is-selected {
  border-color: var(--green);
  background: rgba(13, 107, 69, 0.08);
}

.exam-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-top: 1.5rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
}

.exam-results {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.exam-score-card {
  display: grid;
  gap: 1rem;
  padding: 1.5rem 1.6rem;
  border-radius: var(--radius);
  background:
    linear-gradient(135deg, rgba(8, 72, 48, 0.94), rgba(13, 107, 69, 0.88));
  color: #f4faf6;
  box-shadow: var(--shadow);
}

.exam-score-card.is-pass {
  background:
    linear-gradient(135deg, rgba(8, 72, 48, 0.94), rgba(13, 107, 69, 0.88));
}

.exam-score-card.is-fail {
  background:
    linear-gradient(135deg, rgba(100, 45, 20, 0.92), rgba(180, 60, 40, 0.85));
}

.exam-score-main {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.25rem;
}

.exam-score-circle {
  width: 5.5rem;
  height: 5.5rem;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: rgba(255, 255, 255, 0.15);
  border: 3px solid rgba(255, 255, 255, 0.35);
  flex-shrink: 0;
}

.exam-score-circle strong {
  font-size: 1.65rem;
  line-height: 1;
}

.exam-score-circle span {
  font-size: 0.75rem;
  opacity: 0.85;
}

.exam-score-summary h2 {
  margin: 0 0 0.35rem;
  font-size: 1.5rem;
}

.exam-score-summary p {
  margin: 0;
  opacity: 0.9;
  max-width: 28rem;
}

.exam-stats-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  font-size: 0.9rem;
  opacity: 0.92;
}

.exam-panel {
  padding: 1.25rem 1.3rem;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--paper-elevated);
}

.exam-panel h3 {
  margin: 0 0 0.85rem;
  font-size: 1.1rem;
  color: var(--green-deep);
}

.exam-wrong-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.exam-wrong-item {
  padding: 0.85rem 0.95rem;
  border-radius: 10px;
  background: rgba(180, 60, 40, 0.06);
  border: 1px solid rgba(180, 60, 40, 0.15);
}

.exam-wrong-q {
  margin: 0 0 0.65rem;
  font-size: 0.98rem;
  font-weight: 600;
  line-height: 1.55;
}

.exam-review-options {
  list-style: none;
  margin: 0 0 0.75rem;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.exam-review-option {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.4rem 0.75rem;
  padding: 0.5rem 0.7rem;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.7);
  font-size: 0.9rem;
  line-height: 1.45;
}

.exam-review-option.is-correct {
  border-color: var(--green);
  background: rgba(13, 107, 69, 0.1);
}

.exam-review-option.is-wrong {
  border-color: rgba(180, 60, 40, 0.4);
  background: rgba(180, 60, 40, 0.08);
}

.option-tag {
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.15rem 0.5rem;
  border-radius: 999px;
  white-space: nowrap;
}

.option-tag.correct {
  background: rgba(13, 107, 69, 0.15);
  color: var(--green-deep);
}

.option-tag.wrong {
  background: rgba(180, 60, 40, 0.12);
  color: #8a2415;
}

.exam-wrong-summary {
  padding-top: 0.55rem;
  border-top: 1px dashed var(--line);
  font-size: 0.88rem;
  color: var(--ink-soft);
}

.exam-wrong-summary p {
  margin: 0 0 0.25rem;
  line-height: 1.45;
}

.exam-wrong-summary .meta {
  font-size: 0.82rem;
}

/* —— Placeholders —— */
.placeholder-panel {
  padding: 2.5rem 1.75rem;
  border-radius: var(--radius);
  border: 1px dashed rgba(13, 107, 69, 0.35);
  background: rgba(255, 255, 255, 0.45);
  text-align: center;
}

.placeholder-panel h2 {
  margin: 0 0 0.5rem;
  font-family: var(--font-serif);
}

.placeholder-panel p {
  margin: 0 auto;
  max-width: 32rem;
  color: var(--ink-soft);
}

.placeholder-panel ul {
  display: inline-block;
  text-align: left;
  margin: 1.25rem auto 0;
  color: var(--ink-soft);
  padding-left: 1.2rem;
}

.site-footer {
  width: min(1100px, calc(100% - (var(--page-pad-x) * 2)));
  margin: 0 auto 2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  font-size: 0.8rem;
  color: var(--ink-soft);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 0.5rem;
}

/* —— Responsive: tablet & phone (scenarios) —— */
@media (max-width: 900px) {
  .scenario-layout {
    grid-template-columns: 1fr;
  }

  .scenario-sidebar-label {
    display: block;
  }

  .scenario-picker {
    display: flex;
  }

  .scenario-list {
    display: none;
  }

  .scenario-detail {
    min-height: 0;
    padding: 1.1rem 1rem 1.2rem;
  }

  .detail-top h2 {
    font-size: 1.25rem;
  }

  .answer-card .media-frame {
    width: 100%;
  }

  .answer-card .media-meta {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* —— Responsive: phone —— */
@media (max-width: 720px) {
  .site-nav--desktop {
    display: none;
  }

  .brand-text span {
    display: none;
  }

  .brand-text strong {
    font-size: 1.05rem;
  }

  .mobile-nav {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 60;
    min-height: calc(var(--mobile-nav-h) + var(--safe-bottom));
    padding: 0.35rem 0.35rem calc(0.35rem + var(--safe-bottom));
    background: rgba(250, 252, 249, 0.96);
    border-top: 1px solid var(--line);
    backdrop-filter: blur(14px);
    box-shadow: 0 -8px 24px rgba(8, 40, 28, 0.08);
  }

  .mobile-nav button {
    appearance: none;
    border: 0;
    background: transparent;
    font: inherit;
    color: var(--ink-soft);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.15rem;
    padding: 0.35rem 0.25rem;
    border-radius: 12px;
    cursor: pointer;
    min-height: 3.35rem;
  }

  .mobile-nav button[aria-current="page"] {
    color: var(--green-deep);
    background: rgba(13, 107, 69, 0.1);
  }

  .mobile-nav-icon {
    width: 1.55rem;
    height: 1.55rem;
    border-radius: 50%;
    display: grid;
    place-items: center;
    font-size: 0.78rem;
    font-weight: 800;
    background: rgba(13, 107, 69, 0.1);
    color: var(--green-deep);
    line-height: 1;
  }

  .mobile-nav button[aria-current="page"] .mobile-nav-icon {
    background: var(--green);
    color: #fff;
  }

  .mobile-nav-label {
    font-size: 0.72rem;
    font-weight: 700;
    line-height: 1.2;
  }

  .page {
    padding: 1.15rem 0 calc(5.75rem + var(--safe-bottom));
  }

  .section-head {
    margin-bottom: 1.15rem;
  }

  .section-head h1 {
    font-size: clamp(1.55rem, 7vw, 2rem);
  }

  .section-head p {
    font-size: 0.95rem;
  }

  .hero-strip {
    margin-bottom: 1.25rem;
    padding: 1.15rem 1.1rem;
    border-radius: 12px;
  }

  .hero-strip h2 {
    font-size: 1.35rem;
  }

  .hero-strip p {
    font-size: 0.92rem;
  }

  .cpr-tabs {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.4rem;
  }

  .cpr-tabs button {
    width: 100%;
    text-align: center;
    padding: 0.65rem 0.35rem;
    font-size: 0.85rem;
    border-radius: 12px;
  }

  .media-frame {
    border-radius: 12px;
  }

  .media-meta {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.4rem;
  }

  .disclaimer {
    font-size: 0.82rem;
    padding: 0.75rem 0.85rem;
  }

  .btn {
    min-height: 2.75rem;
    padding: 0.7rem 1.1rem;
  }

  .detail-actions {
    flex-direction: column;
  }

  .detail-actions .btn {
    width: 100%;
  }

  .quiz-toolbar {
    flex-direction: column;
    align-items: stretch;
  }

  .search-field {
    max-width: none;
  }

  .search-field input {
    font-size: 1rem;
    min-height: 2.85rem;
    border-radius: 14px;
  }

  .quiz-item,
  .exam-question,
  .exam-intro,
  .exam-panel {
    padding: 0.95rem 0.9rem;
  }

  .quiz-question,
  .exam-q-text {
    font-size: 0.98rem;
  }

  .quiz-options button,
  .exam-options label {
    min-height: 2.85rem;
    padding: 0.7rem 0.75rem;
    font-size: 0.92rem;
  }

  .quiz-pager {
    gap: 0.3rem;
  }

  .quiz-pager button {
    min-height: 2.5rem;
    min-width: 2.5rem;
  }

  .exam-bar {
    top: calc(var(--nav-h) + var(--safe-top) - 0.4rem);
    gap: 0.55rem;
    padding: 0.7rem 0.8rem;
    border-radius: 10px;
  }

  .exam-timer {
    font-size: 1rem;
  }

  .exam-actions {
    flex-direction: column;
  }

  .exam-actions .btn {
    width: 100%;
  }

  .exam-score-card {
    padding: 1.15rem 1.05rem;
  }

  .exam-score-main {
    gap: 0.9rem;
  }

  .exam-score-circle {
    width: 4.75rem;
    height: 4.75rem;
  }

  .exam-score-summary h2 {
    font-size: 1.3rem;
  }

  .exam-stats-row {
    gap: 0.45rem 0.85rem;
    font-size: 0.84rem;
  }

  .exam-review-option {
    align-items: flex-start;
    flex-direction: column;
  }

  .site-footer {
    margin-bottom: calc(5.5rem + var(--safe-bottom));
    flex-direction: column;
    gap: 0.25rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }

  html {
    scroll-behavior: auto;
  }
}