:root {
  /* family theme (default) — Toca Boca / PBS Kids / Sago Mini inspired: candy-bright, chunky, sticker-cut shapes */
  --font-heading: 'Fredoka', 'Zen Maru Gothic', 'Noto Sans TC', sans-serif;
  --font-body: 'Zen Maru Gothic', 'Noto Sans TC', system-ui, sans-serif;
  --font-mono: 'Noto Sans TC', system-ui, sans-serif;

  --ink: #2b2118;
  --accent: #ff5fa2;
  --accent-2: #ffcb3d;
  --accent-dark: #e8449a;
  --bg-a: #fffaf0;
  --card-bg: #ffffff;
  --card-alt-bg: #fff4d6;
  --text: #3a2c22;
  --text-muted: #8a7867;
  --border: var(--ink);
  --warn: #ef5b3d;
  --radius: 28px;
  --radius-sm: 16px;
  --shadow: 4px 4px 0 var(--ink);

  --chip-1-bg: #fff1a8; --chip-1-bd: #2b2118;
  --chip-2-bg: #baf3d8; --chip-2-bd: #2b2118;
  --chip-3-bg: #bfe4ff; --chip-3-bd: #2b2118;
  --chip-4-bg: #ffd1ec; --chip-4-bd: #2b2118;
}

:root[data-theme="pro"] {
  /* professional theme — flat dashboard, white cards on cool grey, sidebar nav */
  --font-heading: 'Poppins', 'Noto Sans TC', sans-serif;
  --font-body: 'Noto Sans TC', 'Poppins', system-ui, sans-serif;
  --font-mono: 'Poppins', 'Noto Sans TC', monospace;

  --accent: #2199c9;
  --accent-2: #1b7ea3;
  --accent-dark: #16667f;
  --bg-a: #eef1f5;
  --card-bg: #ffffff;
  --card-alt-bg: #f3f6f9;
  --text: #263341;
  --text-muted: #6b7a89;
  --border: #e3e8ee;
  --warn: #e8604c;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 4px 18px rgba(23, 43, 66, 0.07);

  --data-1: #f2a93b; /* gold */
  --data-2: #e8604c; /* coral */
  --data-3: #2bab8e; /* teal */
  --data-4: #7c8fe0; /* periwinkle */
  --data-5: #b06fd1; /* orchid */
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font-body);
  background: var(--bg-a);
  color: var(--text);
  line-height: 1.65;
}

h1, h2, h3 { font-family: var(--font-heading); }

/* ================= FAMILY THEME ================= */

:root:not([data-theme="pro"]) body {
  position: relative;
  overflow-x: hidden;
}
:root:not([data-theme="pro"]) body::before,
:root:not([data-theme="pro"]) body::after {
  content: "";
  position: fixed;
  border-radius: 50%;
  z-index: -1;
  opacity: 0.55;
}
:root:not([data-theme="pro"]) body::before {
  width: 320px; height: 320px;
  background: #ffe792;
  top: -130px; left: -110px;
}
:root:not([data-theme="pro"]) body::after {
  width: 280px; height: 280px;
  background: #bdf3e2;
  bottom: -120px; right: -100px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  background: var(--accent);
  color: #fff;
  padding: 1.1rem 1rem;
  position: relative;
  border-bottom: 4px solid var(--ink);
}

.topbar h1 {
  font-size: 1.15rem;
  margin: 0;
  font-weight: 700;
  letter-spacing: 0.01em;
  text-shadow: 0 2px 0 rgba(0, 0, 0, 0.12);
}

.topbar .switch-link {
  position: absolute;
  right: 1rem;
  top: 50%;
  transform: translateY(-50%);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background: #fff;
  color: var(--ink);
  border: 2.5px solid var(--ink);
  border-radius: 999px;
  padding: 0.4rem 1rem;
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
  box-shadow: 3px 3px 0 var(--ink);
  transition: transform 0.12s ease, box-shadow 0.12s ease;
}
.topbar .switch-link:hover { transform: translateY(-50%) translate(-1px, -1px); box-shadow: 4px 4px 0 var(--ink); }
.topbar .switch-link:active { transform: translateY(-50%); box-shadow: 1px 1px 0 var(--ink); }

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 1.6rem 1rem 3rem;
}

.card {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 3px solid var(--ink);
  padding: 1.5rem 1.5rem 1.7rem;
  margin-bottom: 1.6rem;
}

.card-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.1rem;
}

.avatar {
  width: 68px;
  height: 68px;
  border-radius: 50%;
  background-size: cover;
  background-position: center top;
  border: 3px solid var(--ink);
  box-shadow: 3px 3px 0 var(--ink);
  padding: 0;
  cursor: pointer;
  flex-shrink: 0;
  transition: transform 0.2s ease;
}
.avatar:hover { transform: rotate(-8deg) scale(1.08); }

.card-header h2 { margin: 0; font-size: 1.3rem; }
.card-header p { margin: 0.2rem 0 0; color: var(--text-muted); font-size: 0.92rem; font-weight: 600; }

.field { margin-bottom: 1.2rem; }

.field label {
  display: block;
  font-family: var(--font-heading);
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 0.4rem;
}

.field select,
.field input[type="number"] {
  width: 100%;
  padding: 0.75rem 0.9rem;
  border-radius: var(--radius-sm);
  border: 3px solid var(--ink);
  background: var(--card-alt-bg);
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  appearance: none;
}
.field select:focus, .field input:focus { outline: none; background: #fff8e1; }

/* alternate the sticker colour per field, like a shelf of toy tiles */
.field:nth-of-type(4n+1) select { background: var(--chip-1-bg); }
.field:nth-of-type(4n+2) select { background: var(--chip-3-bg); }
.field:nth-of-type(4n+3) select { background: var(--chip-4-bg); }
.field:nth-of-type(4n+4) select { background: var(--chip-2-bg); }

.field .hint {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-top: 0.3rem;
  font-weight: 600;
}

.field .helper-note {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--ink);
  margin-top: 0.45rem;
  background: var(--chip-1-bg);
  border: 2.5px solid var(--ink);
  border-radius: var(--radius-sm);
  padding: 0.55rem 0.75rem;
  display: none;
}
.field .helper-note.show { display: block; }

.checkbox-group, .radio-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.checkbox-group label, .radio-group label {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: var(--card-alt-bg);
  border: 2.5px solid var(--ink);
  border-radius: 999px;
  padding: 0.5rem 1rem;
  font-family: var(--font-heading);
  font-size: 0.92rem;
  font-weight: 600;
  cursor: pointer;
  color: var(--ink);
  box-shadow: 2.5px 2.5px 0 var(--ink);
  transition: transform 0.12s ease, box-shadow 0.12s ease;
}
.checkbox-group label:hover, .radio-group label:hover { transform: translate(-1px, -1px); box-shadow: 3.5px 3.5px 0 var(--ink); }
.checkbox-group label:active, .radio-group label:active { transform: translate(0, 0); box-shadow: 1px 1px 0 var(--ink); }

.checkbox-group input, .radio-group input { accent-color: var(--accent-dark); width: 16px; height: 16px; }

.checkbox-group label:nth-child(4n+1) { background: var(--chip-1-bg); }
.checkbox-group label:nth-child(4n+2) { background: var(--chip-2-bg); }
.checkbox-group label:nth-child(4n+3) { background: var(--chip-3-bg); }
.checkbox-group label:nth-child(4n+4) { background: var(--chip-4-bg); }

.actions { text-align: center; margin-top: 1.3rem; }

.btn-primary {
  background: var(--accent-2);
  color: var(--ink);
  border: 3px solid var(--ink);
  border-radius: 999px;
  padding: 0.9rem 2.8rem;
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 5px 5px 0 var(--ink);
  transition: transform 0.12s ease, box-shadow 0.12s ease;
}
.btn-primary:hover { transform: translate(-2px, -2px); box-shadow: 7px 7px 0 var(--ink); }
.btn-primary:active { transform: translate(1px, 1px); box-shadow: 2px 2px 0 var(--ink); }
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; transform: none; box-shadow: 5px 5px 0 var(--ink); }

.btn-secondary {
  background: #fff;
  color: var(--ink);
  border: 2.5px solid var(--ink);
  border-radius: 999px;
  padding: 0.6rem 1.4rem;
  font-family: var(--font-heading);
  font-weight: 600;
  cursor: pointer;
  box-shadow: 3px 3px 0 var(--ink);
}
.btn-secondary:hover { transform: translate(-1px, -1px); box-shadow: 4px 4px 0 var(--ink); }

.chart-wrapper { position: relative; height: 320px; }

[hidden] { display: none !important; }

details.refs summary {
  font-family: var(--font-heading);
  font-weight: 700;
  cursor: pointer;
  margin-bottom: 0.5rem;
}
details.refs p { font-size: 0.85rem; color: var(--text-muted); margin: 0.5rem 0; }
details.refs hr { border: none; border-top: 2px dashed var(--border); margin: 0.5rem 0; }

dialog {
  border: none;
  border-radius: var(--radius);
  padding: 0;
  width: min(92vw, 480px);
  max-height: min(85vh, 640px);
  overflow-y: auto;
  overscroll-behavior: contain;
  box-shadow: 6px 6px 0 var(--ink);
  border: 3px solid var(--ink);
}
dialog::backdrop { background: rgba(58, 44, 34, 0.5); }

.dialog-inner { position: relative; padding: 1.3rem 1.5rem 1.5rem; }
.dialog-inner h2 { margin: 0 0 0.7rem; padding-right: 1.6rem; font-size: 1.15rem; }

.dialog-close-x {
  position: absolute;
  top: 0.7rem;
  right: 0.7rem;
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: #fff;
  border: 2.5px solid var(--ink);
  color: var(--ink);
  font-size: 0.9rem;
  line-height: 1;
  cursor: pointer;
  padding: 0;
}
.dialog-close-x:hover { background: var(--card-alt-bg); }

.dialog-inner .dialog-avatar {
  display: block;
  width: 130px;
  height: 130px;
  margin: 0 auto 0.9rem;
  object-fit: cover;
  object-position: center top;
  border-radius: 50%;
  border: 3px solid var(--ink);
  box-shadow: 3px 3px 0 var(--ink);
}
.dialog-inner p { font-size: 0.95rem; color: var(--text); margin: 0 0 0.4rem; font-weight: 500; }
.dialog-actions { text-align: right; margin-top: 1rem; }
.dialog-actions.center { text-align: center; }

.sponsor-group summary { font-family: var(--font-heading); font-weight: 700; padding: 0.4rem 0; cursor: pointer; }
.sponsor-group ul { margin: 0.3rem 0 0.8rem; padding-left: 1.2rem; font-size: 0.88rem; }

footer.disclaimer {
  max-width: 720px;
  margin: 0 auto 2rem;
  padding: 0 1rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  text-align: center;
}

/* ================= PROFESSIONAL THEME (dashboard) ================= */

.pro-shell { display: flex; align-items: stretch; min-height: 100vh; }

.pro-sidebar {
  width: 76px;
  flex-shrink: 0;
  background: var(--accent);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.9rem;
  padding: 1.6rem 0;
  position: sticky;
  top: 0;
  height: 100vh;
}
.pro-sidebar a {
  color: #fff;
  opacity: 0.72;
  display: flex;
  transition: opacity 0.15s ease;
}
.pro-sidebar a:hover { opacity: 1; }
.pro-sidebar a svg { width: 23px; height: 23px; }
.pro-sidebar .pro-sidebar-exit { margin-top: auto; opacity: 0.85; }

.pro-main { flex: 1; min-width: 0; }
.pro-main-inner { max-width: 780px; margin: 0 auto; padding: 1.8rem 1.5rem 3rem; }

.pro-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.3rem;
}
.pro-header h1 {
  font-size: 1.15rem;
  font-weight: 600;
  margin: 0;
  color: var(--text);
}
.pro-header .switch-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  background: #fff;
  color: var(--accent-dark);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.45rem 0.95rem;
  font-size: 0.85rem;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
  box-shadow: var(--shadow);
}
.pro-header .switch-link:hover { background: var(--card-alt-bg); }

[data-theme="pro"] main { max-width: none; margin: 0; padding: 0; }

[data-theme="pro"] .card {
  border: none;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1.35rem 1.5rem 1.55rem;
}

[data-theme="pro"] .card-header { border-bottom: 1px solid var(--border); padding-bottom: 0.8rem; margin-bottom: 1.1rem; }
[data-theme="pro"] .card-header h2 { font-size: 1.05rem; font-weight: 700; }

[data-theme="pro"] .field label {
  font-size: 0.76rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}

[data-theme="pro"] .field select,
[data-theme="pro"] .field input[type="number"] {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--card-alt-bg);
  font-weight: 500;
}
[data-theme="pro"] .field select:focus,
[data-theme="pro"] .field input:focus { background: #fff; border-color: var(--accent); }

[data-theme="pro"] .checkbox-group label,
[data-theme="pro"] .radio-group label {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  box-shadow: none;
  font-weight: 500;
  background: var(--card-alt-bg);
}
[data-theme="pro"] .checkbox-group label:hover,
[data-theme="pro"] .radio-group label:hover { transform: none; border-color: var(--accent); }
[data-theme="pro"] .checkbox-group label:active,
[data-theme="pro"] .radio-group label:active { transform: none; }

[data-theme="pro"] .field .helper-note {
  background: var(--card-alt-bg);
  border: none;
  border-left: 3px solid var(--accent);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-weight: 400;
}

[data-theme="pro"] .btn-primary {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  padding: 0.75rem 1.7rem;
  font-size: 0.92rem;
  box-shadow: none;
}
[data-theme="pro"] .btn-primary:hover { transform: none; background: var(--accent-dark); box-shadow: none; }
[data-theme="pro"] .btn-primary:active { transform: none; }

[data-theme="pro"] .btn-secondary {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  box-shadow: none;
  font-weight: 600;
}
[data-theme="pro"] .btn-secondary:hover { transform: none; background: var(--card-alt-bg); }

[data-theme="pro"] dialog { border-radius: var(--radius); box-shadow: 0 12px 40px rgba(15, 30, 45, 0.25); border: none; }
[data-theme="pro"] .dialog-close-x { border: 1px solid var(--border); box-shadow: none; }
[data-theme="pro"] .dialog-close-x:hover { background: var(--card-alt-bg); }

[data-theme="pro"] details.refs p { font-family: var(--font-mono); font-size: 0.8rem; }
[data-theme="pro"] details.refs hr { border-top: 1px solid var(--border); }

.pro-banner {
  background: var(--card-alt-bg);
  border: none;
  border-left: 4px solid var(--accent);
  border-radius: var(--radius-sm);
  padding: 0.85rem 1.05rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 1.4rem;
}

table.result-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 0.85rem;
  margin-top: 0.9rem;
}
table.result-table th, table.result-table td {
  border: 1px solid var(--border);
  padding: 0.5rem 0.6rem;
  text-align: center;
}
table.result-table th { background: var(--card-alt-bg); font-family: var(--font-heading); font-weight: 700; }
table.result-table td:first-child, table.result-table th:first-child { text-align: left; font-family: var(--font-heading); }

[data-theme="pro"] footer.disclaimer { font-size: 0.78rem; }

@media (max-width: 640px) {
  .pro-sidebar { width: 56px; gap: 1.4rem; }
  .pro-sidebar a svg { width: 20px; height: 20px; }
  .pro-main-inner { padding: 1.2rem 0.9rem 2.5rem; }
}

@media (max-width: 480px) {
  main, .pro-main-inner { padding-left: 0.75rem; padding-right: 0.75rem; }
  .card { padding: 1.1rem 1.1rem 1.3rem; }
  .chart-wrapper { height: 240px; }
  .btn-primary { padding: 0.8rem 1.8rem; }
}

@media (max-height: 420px) {
  .chart-wrapper { height: 180px; }
}

@media print {
  .topbar, .card.intro, .actions, footer.disclaimer, .no-print, .pro-sidebar { display: none !important; }
  .pro-shell { display: block; }
  .pro-main-inner { max-width: none; padding: 0; margin: 0; }
  main { max-width: none; padding: 0; }
  .card { box-shadow: none; border: 1px solid #ccc; }
}