/* ═══════════════════════════════════════════════
   Dosage Calculator Practice — Stylesheet
   Nurses Compass — Sidebar layout
   ═══════════════════════════════════════════════ */

:root {
  --dcp-primary: #03629c;
  --dcp-primary-light: #038ADD;
  --dcp-primary-dark: #024B78;
  --dcp-accent: #9C0362;
  --dcp-accent-light: #C8047D;
  --dcp-correct: #0d7a3e;
  --dcp-correct-bg: #e6f9ed;
  --dcp-incorrect: #c0392b;
  --dcp-incorrect-bg: #fde8e6;
  --dcp-bg: #f5f7fa;
  --dcp-card-bg: #ffffff;
  --dcp-text: #2c3e50;
  --dcp-muted: #6c7a89;
  --dcp-border: #dce1e8;
  --dcp-radius: 12px;
}

/* ── Page Layout ── */
.dcp-main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px 3rem;
}

.dcp-hero {
  text-align: center;
  padding: 2rem 0 1.5rem;
}

.dcp-hero h1 {
  font-size: 2.2rem;
  color: var(--dcp-primary-dark);
  margin: 0 0 0.4rem;
}

.dcp-subtitle {
  font-size: 1.1rem;
  color: var(--dcp-muted);
  margin: 0;
}

/* ── Sidebar + Content Grid ── */
.dcp-grid {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 30px;
}

/* ── LEFT SIDEBAR ── */
.dcp-sidebar {
  background: #f8f9fa;
  border-radius: 12px;
  padding: 20px;
  height: fit-content;
  position: sticky;
  top: 20px;
  border-left: 4px solid var(--dcp-primary);
}

.dcp-sidebar-nav {
  background: white;
  border-radius: 8px;
  padding: 16px;
  margin-bottom: 16px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.dcp-sidebar-section {
  background: white;
  border-radius: 8px;
  padding: 16px;
  margin-bottom: 16px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.dcp-sidebar-section:last-child {
  margin-bottom: 0;
}

.dcp-sidebar h3 {
  color: var(--dcp-primary-dark);
  margin: 0 0 12px;
  font-size: 0.95rem;
}

/* ── Category Buttons (vertical in sidebar) ── */
.dcp-cat-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.dcp-cat-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  background: transparent;
  border: 2px solid transparent;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--dcp-text);
  text-align: left;
}

.dcp-cat-btn:hover {
  background: #e9f1f9;
  border-color: var(--dcp-primary-light);
}

.dcp-cat-btn.active {
  background: #dceaf5;
  border-color: var(--dcp-primary);
  color: var(--dcp-primary-dark);
}

.dcp-cat-icon {
  font-size: 1.1rem;
  flex-shrink: 0;
  width: 1.4rem;
  text-align: center;
}

.dcp-cat-label {
  line-height: 1.2;
}

/* ── Difficulty Buttons ── */
.dcp-diff-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.dcp-diff-btn {
  padding: 5px 14px;
  border: 1.5px solid var(--dcp-border);
  border-radius: 20px;
  background: var(--dcp-card-bg);
  cursor: pointer;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--dcp-text);
  transition: all 0.2s;
}

.dcp-diff-btn:hover {
  border-color: var(--dcp-primary-light);
}

.dcp-diff-btn.active {
  background: var(--dcp-primary);
  color: #fff;
  border-color: var(--dcp-primary);
}

/* ── Score (in sidebar) ── */
.dcp-score-grid {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 10px;
}

.dcp-score-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.dcp-score-label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--dcp-muted);
}

.dcp-score-value {
  font-size: 1rem;
  font-weight: 700;
  color: var(--dcp-primary-dark);
}

.dcp-reset-btn {
  width: 100%;
  padding: 6px;
  background: none;
  border: 1.5px solid var(--dcp-border);
  border-radius: 6px;
  cursor: pointer;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--dcp-muted);
  transition: all 0.2s;
}

.dcp-reset-btn:hover {
  color: var(--dcp-incorrect);
  border-color: var(--dcp-incorrect);
}

/* ── MAIN CONTENT (right side) ── */
.dcp-content {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  min-width: 0;
}

/* ── Problem Card ── */
.dcp-problem-card {
  background: var(--dcp-card-bg);
  border: 2px solid var(--dcp-border);
  border-radius: var(--dcp-radius);
  padding: 1.5rem;
  transition: border-color 0.3s;
}

.dcp-problem-card.dcp-correct {
  border-color: var(--dcp-correct);
}

.dcp-problem-card.dcp-incorrect {
  border-color: var(--dcp-incorrect);
}

.dcp-problem-badge {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  background: var(--dcp-bg);
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--dcp-primary-dark);
  margin-bottom: 1rem;
}

.dcp-problem-text {
  font-size: 1.1rem;
  line-height: 1.65;
  color: var(--dcp-text);
  margin-bottom: 1.5rem;
}

/* ── Answer Area ── */
.dcp-answer-area {
  margin-bottom: 0.5rem;
}

.dcp-input-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.dcp-answer-input {
  flex: 1;
  max-width: 220px;
  padding: 0.75rem 1rem;
  font-size: 1.2rem;
  font-weight: 600;
  border: 2px solid var(--dcp-border);
  border-radius: 8px;
  outline: none;
  transition: border-color 0.2s;
  -moz-appearance: textfield;
}

.dcp-answer-input::-webkit-inner-spin-button,
.dcp-answer-input::-webkit-outer-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.dcp-answer-input:focus {
  border-color: var(--dcp-primary);
}

.dcp-answer-input.correct {
  border-color: var(--dcp-correct);
  background: var(--dcp-correct-bg);
}

.dcp-answer-input.incorrect {
  border-color: var(--dcp-incorrect);
  background: var(--dcp-incorrect-bg);
}

.dcp-answer-unit {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--dcp-muted);
}

.dcp-btn-row {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.dcp-btn {
  padding: 0.7rem 1.6rem;
  border: none;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s;
}

.dcp-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.dcp-btn-check {
  background: var(--dcp-primary);
  color: #fff;
}

.dcp-btn-check:hover:not(:disabled) {
  background: var(--dcp-primary-dark);
}

.dcp-btn-next {
  background: var(--dcp-accent);
  color: #fff;
}

.dcp-btn-next:hover {
  background: var(--dcp-accent-light);
}

/* ── Feedback ── */
.dcp-feedback {
  margin-top: 1.25rem;
  padding: 1rem 1.25rem;
  border-radius: 8px;
  background: var(--dcp-bg);
}

.dcp-feedback-header {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.3rem;
}

.dcp-correct-header {
  color: var(--dcp-correct);
}

.dcp-incorrect-header {
  color: var(--dcp-incorrect);
}

.dcp-feedback-body {
  font-size: 0.95rem;
  color: var(--dcp-text);
  line-height: 1.5;
}

/* ── Solution Steps ── */
.dcp-solution {
  margin-top: 1.25rem;
  padding: 1.25rem;
  background: #f0f4ff;
  border: 1px solid #c5d4f0;
  border-radius: 8px;
}

.dcp-solution h3 {
  font-size: 1rem;
  color: var(--dcp-primary-dark);
  margin: 0 0 1rem;
}

.dcp-step {
  padding: 0.5rem 0;
  font-size: 0.95rem;
  line-height: 1.6;
  border-bottom: 1px solid rgba(0,0,0,0.06);
  color: var(--dcp-text);
}

.dcp-step:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

/* ── Quick Reference ── */
.dcp-reference {
  background: var(--dcp-card-bg);
  border: 1px solid var(--dcp-border);
  border-radius: var(--dcp-radius);
  overflow: hidden;
}

.dcp-reference summary {
  padding: 1rem 1.25rem;
  font-weight: 700;
  font-size: 1rem;
  cursor: pointer;
  color: var(--dcp-primary-dark);
  user-select: none;
}

.dcp-reference summary:hover {
  background: var(--dcp-bg);
}

.dcp-reference-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 0.75rem;
  padding: 0 1.25rem 1.25rem;
}

.dcp-ref-card {
  background: var(--dcp-bg);
  border-radius: 8px;
  padding: 1rem;
}

.dcp-ref-card h4 {
  font-size: 0.85rem;
  color: var(--dcp-primary-dark);
  margin: 0 0 0.4rem;
}

.dcp-formula {
  font-family: 'Courier New', Courier, monospace;
  font-size: 0.82rem;
  color: var(--dcp-text);
  background: #fff;
  padding: 0.4rem 0.6rem;
  border-radius: 4px;
  margin: 0 0 0.4rem;
  line-height: 1.4;
}

.dcp-example {
  font-size: 0.78rem;
  color: var(--dcp-muted);
  margin: 0;
  font-style: italic;
}

/* ── Content Section ── */
.dcp-content-section {
  background: var(--dcp-card-bg);
  border: 1px solid var(--dcp-border);
  border-radius: var(--dcp-radius);
  padding: 1.5rem;
  line-height: 1.7;
  color: var(--dcp-text);
}

.dcp-content-section h2 {
  font-size: 1.4rem;
  color: var(--dcp-primary-dark);
  margin: 0 0 0.75rem;
}

.dcp-content-section h3 {
  font-size: 1.1rem;
  color: var(--dcp-primary-dark);
  margin: 1.25rem 0 0.5rem;
}

.dcp-content-section ul {
  padding-left: 1.4rem;
}

.dcp-content-section li {
  margin-bottom: 0.4rem;
}

.dcp-content-section a {
  color: var(--dcp-accent);
  text-decoration: underline;
}

.dcp-disclaimer {
  margin-top: 1.5rem;
  padding: 1rem;
  background: #fff8e1;
  border: 1px solid #ffe082;
  border-radius: 6px;
  font-size: 0.85rem;
  color: #5d4037;
}

.dcp-author {
  text-align: center;
  font-size: 0.85rem;
  color: var(--dcp-muted);
  margin-top: 2rem;
}

/* ── Shake Animation ── */
@keyframes dcp-shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-6px); }
  50% { transform: translateX(6px); }
  75% { transform: translateX(-4px); }
}

.shake {
  animation: dcp-shake 0.35s ease-in-out;
}

/* ── XP Toast ── */
.dcp-xp-toast {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background: linear-gradient(135deg, #ff6b35, #f7971e);
  color: #fff;
  font-weight: 700;
  font-size: 1rem;
  padding: 10px 22px;
  border-radius: 24px;
  box-shadow: 0 4px 14px rgba(255,107,53,0.4);
  z-index: 9999;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.3s, transform 0.3s;
  pointer-events: none;
}

.dcp-xp-toast-show {
  opacity: 1;
  transform: translateY(0);
}

/* ── Mobile: sidebar collapses above content ── */
@media (max-width: 768px) {
  .dcp-grid {
    display: flex;
    flex-direction: column;
    gap: 15px;
  }

  .dcp-hero h1 {
    font-size: 1.6rem;
  }

  .dcp-sidebar {
    position: relative;
    top: 0;
    border-left: none;
    border-top: 4px solid var(--dcp-primary);
    padding: 15px;
  }

  .dcp-cat-list {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 6px;
  }

  .dcp-cat-btn {
    padding: 6px 10px;
    font-size: 0.72rem;
    flex-direction: row;
    gap: 4px;
  }

  .dcp-cat-icon {
    font-size: 0.95rem;
    width: auto;
  }

  .dcp-diff-list {
    gap: 4px;
  }

  .dcp-score-grid {
    flex-direction: row;
    justify-content: space-around;
  }

  .dcp-score-item {
    flex-direction: column;
    align-items: center;
  }

  .dcp-reset-btn {
    width: auto;
    margin-top: 6px;
  }

  .dcp-input-row {
    flex-direction: column;
    align-items: stretch;
  }

  .dcp-answer-input {
    max-width: 100%;
  }

  .dcp-btn-row {
    flex-direction: column;
  }

  .dcp-btn {
    width: 100%;
    text-align: center;
  }

  .dcp-reference-grid {
    grid-template-columns: 1fr;
  }
}