/* ===== Algocare CBT — Design Tokens ===== */
:root {
  --paper: #F7F8F7;
  --card: #FFFFFF;
  --ink: #16232E;
  --ink-soft: #46545F;
  --grey: #8A9199;
  --grey-line: #DDE2E1;
  --scrub: #2F6F62;
  --scrub-soft: #E4EEEC;
  --brick: #B14A3A;
  --brick-soft: #F7E9E6;
  --amber: #C98A2E;
  --amber-soft: #FBF0DE;

  --display: 'Space Grotesk', sans-serif;
  --body: 'IBM Plex Sans', sans-serif;
  --mono: 'IBM Plex Mono', monospace;

  --radius: 6px;
  --shadow: 0 1px 2px rgba(22, 35, 46, 0.06), 0 4px 12px rgba(22, 35, 46, 0.05);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--body);
  font-size: 16px;
  line-height: 1.5;
}

a { color: var(--scrub); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3 {
  font-family: var(--display);
  font-weight: 600;
  margin: 0 0 0.5em 0;
  letter-spacing: -0.01em;
}

button, input {
  font-family: inherit;
  font-size: inherit;
}

:focus-visible {
  outline: 2px solid var(--scrub);
  outline-offset: 2px;
}

.container {
  max-width: 760px;
  margin: 0 auto;
  padding: 24px 20px 64px;
}

/* ===== Top bar ===== */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid var(--grey-line);
  background: var(--card);
}

.brand {
  font-family: var(--display);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--ink);
}

.brand .pulse-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--scrub);
  margin-right: 8px;
  animation: pulse-dot 1.6s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.8); }
}

/* ===== Search / browse (index.html) ===== */
.search-box {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--grey-line);
  border-radius: var(--radius);
  background: var(--card);
  margin-bottom: 24px;
}

.branch-group { margin-bottom: 28px; }

.branch-label {
  font-family: var(--mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--grey);
  margin-bottom: 10px;
}

.topic-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  background: var(--card);
  border: 1px solid var(--grey-line);
  border-radius: var(--radius);
  margin-bottom: 8px;
  transition: border-color 0.15s ease;
}

.topic-card:hover {
  border-color: var(--scrub);
}

.topic-title {
  font-weight: 500;
  color: var(--ink);
}

.topic-meta {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--grey);
}

.topic-actions a {
  font-size: 0.85rem;
  font-weight: 600;
  margin-left: 14px;
}

.empty-state {
  text-align: center;
  padding: 48px 16px;
  color: var(--grey);
}

/* ===== ECG pulse strip (signature element / timer) ===== */
.pulse-strip {
  position: relative;
  height: 48px;
  background: var(--ink);
  overflow: hidden;
}

.pulse-strip svg {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 200%;
  animation: pulse-scroll 3s linear infinite;
}

.pulse-strip.warning svg { stroke: var(--amber); }
.pulse-strip.danger svg { stroke: var(--brick); }
.pulse-strip svg { stroke: var(--scrub); }

@keyframes pulse-scroll {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

.timer-readout {
  position: absolute;
  top: 50%;
  right: 16px;
  transform: translateY(-50%);
  font-family: var(--mono);
  font-size: 1.1rem;
  font-weight: 600;
  color: #fff;
  background: rgba(0,0,0,0.35);
  padding: 4px 10px;
  border-radius: var(--radius);
}

/* ===== Test layout ===== */
.test-layout {
  display: flex;
  gap: 24px;
  align-items: flex-start;
}

.question-nav {
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex-shrink: 0;
}

.nav-tab {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--mono);
  font-size: 0.85rem;
  border: 1px solid var(--grey-line);
  border-radius: var(--radius);
  background: var(--card);
  cursor: pointer;
  color: var(--ink-soft);
}

.nav-tab.current { border-color: var(--ink); color: var(--ink); font-weight: 700; }
.nav-tab.answered-correct { background: var(--scrub-soft); border-color: var(--scrub); color: var(--scrub); }
.nav-tab.answered-incorrect { background: var(--brick-soft); border-color: var(--brick); color: var(--brick); }
.nav-tab.answered { background: var(--ink); border-color: var(--ink); color: #fff; }

.grid-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 20px;
}

.grid-nav .nav-tab {
  width: 32px;
  height: 32px;
  font-size: 0.72rem;
}

.device-banner {
  background: var(--amber-soft);
  color: var(--ink);
  padding: 10px 16px;
  font-size: 0.85rem;
  text-align: center;
  border-bottom: 1px solid var(--amber);
}

.mode-card {
  background: var(--card);
  border: 1px solid var(--grey-line);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 16px;
}

.mode-card h3 { margin-bottom: 6px; }
.mode-card p { color: var(--ink-soft); font-size: 0.9rem; margin: 0 0 14px 0; }

.form-row {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 14px;
}

.form-row label {
  font-family: var(--mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--grey);
}

.form-row select, .form-row input[type="number"] {
  padding: 10px 12px;
  border: 1px solid var(--grey-line);
  border-radius: var(--radius);
  background: var(--card);
}

.score-summary {
  text-align: center;
  padding: 32px 16px;
}

.score-summary .big-score {
  font-family: var(--mono);
  font-size: 3rem;
  font-weight: 700;
  margin: 12px 0;
}

.test-card {
  flex: 1;
  background: var(--card);
  border: 1px solid var(--grey-line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 28px;
  position: relative;
}

.folder-tab {
  position: absolute;
  top: -14px;
  left: 20px;
  background: var(--ink);
  color: #fff;
  font-family: var(--mono);
  font-size: 0.7rem;
  padding: 4px 10px;
  border-radius: 4px 4px 0 0;
}

.question-number {
  font-family: var(--mono);
  color: var(--grey);
  font-size: 0.85rem;
  margin-bottom: 8px;
}

.question-text {
  font-size: 1.15rem;
  font-weight: 500;
  margin-bottom: 20px;
}

.option {
  display: block;
  width: 100%;
  text-align: left;
  padding: 12px 16px;
  margin-bottom: 8px;
  border: 1px solid var(--grey-line);
  border-radius: var(--radius);
  background: var(--card);
  cursor: pointer;
}

.option:hover { border-color: var(--ink-soft); }
.option.selected { border-color: var(--ink); background: var(--paper); }
.option.correct { border-color: var(--scrub); background: var(--scrub-soft); }
.option.incorrect { border-color: var(--brick); background: var(--brick-soft); }

.action-row {
  display: flex;
  gap: 10px;
  margin-top: 20px;
}

.btn {
  padding: 10px 18px;
  border-radius: var(--radius);
  border: 1px solid var(--ink);
  background: var(--ink);
  color: #fff;
  font-weight: 600;
  cursor: pointer;
}

.btn.secondary {
  background: var(--card);
  color: var(--ink);
}

.btn:disabled { opacity: 0.4; cursor: not-allowed; }

.explanation-box {
  margin-top: 18px;
  padding: 16px;
  background: var(--paper);
  border-left: 3px solid var(--scrub);
  border-radius: var(--radius);
  font-size: 0.95rem;
  color: var(--ink-soft);
}

.explanation-box a { font-weight: 600; }

/* ===== Article layout ===== */
.breadcrumb {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--grey);
  margin-bottom: 16px;
}

.article-heading {
  scroll-margin-top: 24px;
  padding: 20px 0;
  border-bottom: 1px solid var(--grey-line);
}

.article-heading h2 {
  font-size: 1.15rem;
}

.article-heading:target {
  background: var(--amber-soft);
  margin: 0 -20px;
  padding: 20px;
}

.test-yourself-link {
  display: inline-block;
  margin-top: 24px;
  padding: 10px 18px;
  background: var(--scrub);
  color: #fff;
  border-radius: var(--radius);
  font-weight: 600;
}

.test-yourself-link:hover { text-decoration: none; opacity: 0.9; }

/* ===== Responsive ===== */
@media (max-width: 640px) {
  .test-layout { flex-direction: column; }
  .question-nav { flex-direction: row; flex-wrap: wrap; }
}

@media (prefers-reduced-motion: reduce) {
  .pulse-strip svg { animation: none; }
  .brand .pulse-dot { animation: none; }
}



/* ===== Star review widget ===== */
.review-widget {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--grey-line);
  text-align: left;
}

.review-prompt {
  font-weight: 600;
  margin-bottom: 8px;
}

.star-row {
  display: flex;
  gap: 4px;
  margin-bottom: 12px;
}

.star-btn {
  background: none;
  border: none;
  font-size: 1.8rem;
  line-height: 1;
  cursor: pointer;
  color: var(--grey-line);
  padding: 0;
}

.star-btn.filled {
  color: var(--amber);
}

.review-widget textarea {
  width: 100%;
  padding: 10px;
  border: 1px solid var(--grey-line);
  border-radius: var(--radius);
  font-family: inherit;
  margin-bottom: 10px;
  resize: vertical;
}