/* ===== Design tokens (from calculator.html) ===== */
:root {
  --ocean-dark: #1a3a5c;
  --ocean: #2563a0;
  --ocean-light: #4a90c4;
  --ocean-pale: #d6e8f7;
  --sauna-warm: #c87533;
  --sauna-light: #f0dcc0;
  --sauna-pale: #faf3ea;
  --green: #2e7d32;
  --green-light: #e8f5e9;
  --red: #c62828;
  --gray-50: #fafafa;
  --gray-100: #f5f5f5;
  --gray-200: #eeeeee;
  --gray-400: #bdbdbd;
  --gray-600: #757575;
  --gray-800: #424242;
  --shadow: 0 2px 8px rgba(0,0,0,0.10);
  --shadow-lg: 0 4px 16px rgba(0,0,0,0.12);
  --radius: 12px;
  --sidebar-width: 280px;
}

/* ===== Reset ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, sans-serif;
  background: var(--gray-100);
  min-height: 100vh;
  color: var(--gray-800);
  line-height: 1.5;
}

/* ===== Header ===== */
header {
  background: linear-gradient(135deg, var(--ocean-dark) 0%, var(--ocean) 100%);
  color: white;
  padding: 1.25rem 1.5rem;
  position: sticky;
  top: 0;
  z-index: 100;
}
header h1 { font-size: 1.4rem; font-weight: 700; }
header p { opacity: 0.85; font-size: 0.85rem; margin-top: 0.15rem; }

/* ===== Hamburger menu toggle ===== */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  width: 28px;
  height: 22px;
  flex-direction: column;
  justify-content: space-between;
}
.menu-toggle span {
  display: block;
  width: 100%;
  height: 3px;
  background: white;
  border-radius: 2px;
  transition: transform 0.2s, opacity 0.2s;
}

/* ===== Layout ===== */
.layout {
  display: flex;
  min-height: calc(100vh - 70px);
}

/* ===== Sidebar ===== */
.sidebar {
  width: var(--sidebar-width);
  min-width: var(--sidebar-width);
  background: white;
  border-right: 1px solid var(--gray-200);
  padding: 1.25rem 0;
  overflow-y: auto;
  position: sticky;
  top: 70px;
  height: calc(100vh - 70px);
}

.nav-group {
  margin-bottom: 1.25rem;
}
.nav-heading {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--gray-600);
  padding: 0.4rem 1.25rem;
}
.nav-item {
  display: block;
  padding: 0.5rem 1.25rem 0.5rem 1.5rem;
  color: var(--gray-800);
  text-decoration: none;
  font-size: 0.88rem;
  border-left: 3px solid transparent;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}
.nav-item:hover {
  background: var(--ocean-pale);
  color: var(--ocean-dark);
}
.nav-item.active {
  background: var(--ocean-pale);
  border-left-color: var(--ocean);
  color: var(--ocean-dark);
  font-weight: 600;
}

/* ===== Content area ===== */
.content {
  flex: 1;
  padding: 2rem;
  max-width: 960px;
  min-width: 0;
}

/* ===== PDF viewer ===== */
#pdf-viewer {
  width: 100%;
  height: calc(100vh - 120px);
  border: none;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  background: white;
}

/* ===== Markdown rendered content ===== */
#markdown-content {
  background: white;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 2rem 2.5rem;
}
#markdown-content:empty {
  display: none;
}

#markdown-content h1 {
  font-size: 1.75rem;
  color: var(--ocean-dark);
  margin-bottom: 0.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--ocean-pale);
}
#markdown-content h2 {
  font-size: 1.35rem;
  color: var(--ocean-dark);
  margin-top: 1.75rem;
  margin-bottom: 0.5rem;
  padding-bottom: 0.35rem;
  border-bottom: 1px solid var(--gray-200);
}
#markdown-content h3 {
  font-size: 1.1rem;
  color: var(--ocean);
  margin-top: 1.5rem;
  margin-bottom: 0.4rem;
}
#markdown-content h4 {
  font-size: 0.95rem;
  color: var(--gray-800);
  margin-top: 1.25rem;
  margin-bottom: 0.3rem;
}
#markdown-content p {
  margin-bottom: 0.75rem;
}
#markdown-content a {
  color: var(--ocean);
  text-decoration: underline;
}
#markdown-content a:hover {
  color: var(--ocean-dark);
}
#markdown-content ul, #markdown-content ol {
  margin-bottom: 0.75rem;
  padding-left: 1.5rem;
}
#markdown-content li {
  margin-bottom: 0.3rem;
}
#markdown-content li > ul, #markdown-content li > ol {
  margin-top: 0.3rem;
  margin-bottom: 0;
}

/* Checkbox lists */
#markdown-content ul.contains-task-list {
  list-style: none;
  padding-left: 0;
}
#markdown-content .task-list-item {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
}
#markdown-content .task-list-item input[type="checkbox"] {
  margin-top: 0.3rem;
  accent-color: var(--ocean);
}

/* Tables */
#markdown-content table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 1rem;
  font-size: 0.9rem;
}
#markdown-content th, #markdown-content td {
  padding: 0.5rem 0.75rem;
  text-align: left;
  border: 1px solid var(--gray-200);
}
#markdown-content th {
  background: var(--ocean-pale);
  font-weight: 600;
  color: var(--ocean-dark);
  font-size: 0.85rem;
}
#markdown-content tr:nth-child(even) {
  background: var(--gray-50);
}

/* Blockquotes */
#markdown-content blockquote {
  border-left: 4px solid var(--ocean-light);
  background: var(--ocean-pale);
  padding: 0.75rem 1rem;
  margin: 0.75rem 0;
  border-radius: 0 8px 8px 0;
  color: var(--ocean-dark);
}
#markdown-content blockquote p:last-child {
  margin-bottom: 0;
}

/* Code */
#markdown-content code {
  background: var(--gray-100);
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  font-size: 0.88em;
}
#markdown-content pre {
  background: var(--gray-800);
  color: var(--gray-100);
  padding: 1rem;
  border-radius: 8px;
  overflow-x: auto;
  margin-bottom: 0.75rem;
}
#markdown-content pre code {
  background: none;
  padding: 0;
  color: inherit;
}

/* Horizontal rule */
#markdown-content hr {
  border: none;
  border-top: 1px solid var(--gray-200);
  margin: 1.5rem 0;
}

/* Strong / emphasis */
#markdown-content strong {
  font-weight: 700;
}

/* ===== Calculator styles (ported from calculator.html) ===== */
#calculator-page {
  max-width: 860px;
}
#calculator-page .card {
  background: white;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}
#calculator-page .card h2 {
  font-size: 1.1rem;
  color: var(--ocean-dark);
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--ocean-pale);
}

/* Form controls */
#calculator-page .field { margin-bottom: 1.25rem; }
#calculator-page .field:last-child { margin-bottom: 0; }
#calculator-page .field label {
  display: block;
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 0.35rem;
  color: var(--gray-800);
}
#calculator-page .field .hint {
  font-size: 0.8rem;
  color: var(--gray-600);
  margin-bottom: 0.35rem;
}

#calculator-page select,
#calculator-page input[type="number"] {
  width: 100%;
  padding: 0.6rem 0.75rem;
  border: 1.5px solid var(--gray-400);
  border-radius: 8px;
  font-size: 0.95rem;
  background: white;
  color: var(--gray-800);
  transition: border-color 0.15s;
}
#calculator-page select:focus,
#calculator-page input[type="number"]:focus {
  outline: none;
  border-color: var(--ocean-light);
  box-shadow: 0 0 0 3px rgba(74,144,196,0.2);
}

#calculator-page .range-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}
#calculator-page .range-row input[type="range"] { flex: 1; accent-color: var(--ocean); }
#calculator-page .range-row .range-value {
  min-width: 60px;
  text-align: center;
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--ocean);
}

#calculator-page .inline-group {
  display: flex;
  gap: 0.75rem;
}
#calculator-page .inline-group > * { flex: 1; }

/* Toggle */
#calculator-page .toggle-row {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}
#calculator-page .toggle {
  position: relative;
  width: 48px; height: 26px;
  flex-shrink: 0;
}
#calculator-page .toggle input { opacity: 0; width: 0; height: 0; }
#calculator-page .toggle .slider {
  position: absolute; inset: 0;
  background: var(--gray-400);
  border-radius: 13px;
  cursor: pointer;
  transition: background 0.2s;
}
#calculator-page .toggle .slider::before {
  content: '';
  position: absolute;
  width: 20px; height: 20px;
  left: 3px; bottom: 3px;
  background: white;
  border-radius: 50%;
  transition: transform 0.2s;
}
#calculator-page .toggle input:checked + .slider { background: var(--green); }
#calculator-page .toggle input:checked + .slider::before { transform: translateX(22px); }
#calculator-page .toggle-label { font-size: 0.9rem; }

/* Results table */
#calculator-page .results-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}
#calculator-page .results-table th,
#calculator-page .results-table td {
  padding: 0.6rem 0.5rem;
  text-align: left;
  border-bottom: 1px solid var(--gray-200);
}
#calculator-page .results-table th {
  font-weight: 600;
  color: var(--gray-600);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}
#calculator-page .results-table td:last-child { text-align: right; font-variant-numeric: tabular-nums; }
#calculator-page .results-table th:last-child { text-align: right; }
#calculator-page .results-table .ref { color: var(--gray-600); font-size: 0.8rem; }
#calculator-page .results-table tr.total td {
  border-top: 2px solid var(--ocean);
  border-bottom: none;
  font-weight: 700;
  font-size: 1rem;
  color: var(--ocean-dark);
  padding-top: 0.75rem;
}
#calculator-page .results-table tr.total-exempt td {
  border-bottom: none;
  font-weight: 700;
  font-size: 1rem;
  color: var(--green);
  padding-top: 0.3rem;
}
#calculator-page .results-table .variable { color: var(--gray-600); font-style: italic; }

/* Notices */
#calculator-page .exemption-notice {
  margin-top: 1rem;
  padding: 0.75rem 1rem;
  background: var(--green-light);
  border-left: 4px solid var(--green);
  border-radius: 0 8px 8px 0;
  font-size: 0.85rem;
  color: var(--green);
}
#calculator-page .exemption-notice strong { display: block; margin-bottom: 0.15rem; }

#calculator-page .season-note {
  margin-top: 1rem;
  padding: 0.75rem 1rem;
  background: var(--sauna-pale);
  border-left: 4px solid var(--sauna-warm);
  border-radius: 0 8px 8px 0;
  font-size: 0.85rem;
  color: var(--sauna-warm);
}

.calc-footer {
  text-align: center;
  padding: 0.5rem 0;
  font-size: 0.8rem;
  color: var(--gray-600);
}

/* ===== Name Suggestions page ===== */
#names-page { max-width: 860px; }
#names-page .card {
  background: white;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}
#names-page .card h2 {
  font-size: 1.1rem;
  color: var(--ocean-dark);
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--ocean-pale);
}
#names-page .field { margin-bottom: 1rem; }
#names-page .field label {
  display: block;
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 0.35rem;
  color: var(--gray-800);
}
#names-page input[type="text"],
#names-page textarea {
  width: 100%;
  padding: 0.6rem 0.75rem;
  border: 1.5px solid var(--gray-400);
  border-radius: 8px;
  font-size: 0.95rem;
  font-family: inherit;
  background: white;
  color: var(--gray-800);
  transition: border-color 0.15s;
  resize: vertical;
}
#names-page input[type="text"]:focus,
#names-page textarea:focus {
  outline: none;
  border-color: var(--ocean-light);
  box-shadow: 0 0 0 3px rgba(74,144,196,0.2);
}
.btn-submit {
  background: var(--ocean);
  color: white;
  border: none;
  padding: 0.6rem 1.5rem;
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s;
}
.btn-submit:hover { background: var(--ocean-dark); }

.names-ul {
  list-style: disc;
  padding-left: 1.5rem;
  margin: 0;
}
.names-ul li {
  padding: 0.35rem 0;
  font-size: 0.95rem;
  color: var(--gray-800);
}
.names-ul li strong {
  color: var(--ocean-dark);
}
.empty-state {
  text-align: center;
  padding: 2rem;
  color: var(--gray-600);
  font-size: 0.95rem;
}

/* ===== Loading state ===== */
.loading {
  text-align: center;
  padding: 3rem;
  color: var(--gray-600);
  font-size: 0.95rem;
}

/* ===== Mobile responsive ===== */
@media (max-width: 768px) {
  .menu-toggle {
    display: flex;
  }
  header {
    padding-left: 3.5rem;
  }
  header h1 { font-size: 1.2rem; }

  .sidebar {
    position: fixed;
    top: 70px;
    left: 0;
    height: calc(100vh - 70px);
    z-index: 99;
    transform: translateX(-100%);
    transition: transform 0.25s ease;
    box-shadow: var(--shadow-lg);
  }
  .sidebar.open {
    transform: translateX(0);
  }

  /* Overlay behind sidebar */
  .sidebar-overlay {
    display: none;
    position: fixed;
    inset: 0;
    top: 70px;
    background: rgba(0,0,0,0.3);
    z-index: 98;
  }
  .sidebar-overlay.open {
    display: block;
  }

  .content {
    padding: 1rem;
  }
  #markdown-content {
    padding: 1.25rem 1rem;
  }
  #calculator-page .inline-group {
    flex-direction: column;
    gap: 0.5rem;
  }
}