/* ===== SimDive Styles ===== */
#simdive-app {
  --sd-primary: #4361ee;
  --sd-primary-dark: #3250d6;
  --sd-accent: #f72585;
  --sd-bg: #f8f9fb;
  --sd-card: #ffffff;
  --sd-text: #1e293b;
  --sd-muted: #64748b;
  --sd-border: #e2e8f0;
  --sd-radius: 10px;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  color: var(--sd-text);
  line-height: 1.5;
  max-width: 1100px;
  margin: 0 auto;
  padding: 20px 16px 60px;
}

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

.sd-screen { display: none; }
.sd-screen.sd-active { display: block; }

/* Card */
.sd-card {
  background: var(--sd-card);
  border-radius: var(--sd-radius);
  box-shadow: 0 1px 4px rgba(0,0,0,.06), 0 4px 16px rgba(0,0,0,.04);
  padding: 32px;
  margin-bottom: 24px;
}

/* Logo */
.sd-logo {
  font-size: 2.2rem;
  font-weight: 800;
  margin: 0 0 4px;
  letter-spacing: -0.5px;
}
.sd-logo span { color: var(--sd-accent); }
.sd-tagline { color: var(--sd-muted); margin: 0 0 20px; }

/* Info box */
.sd-info-box {
  background: #eef2ff;
  border-left: 4px solid var(--sd-primary);
  padding: 14px 18px;
  border-radius: 6px;
  font-size: .9rem;
  margin-bottom: 20px;
  line-height: 1.55;
}
.sd-info-amber {
  background: #fef3c7;
  border-left-color: #f59e0b;
}

/* Tabs */
#sd-tab-btns {
  display: flex;
  gap: 0;
  margin-bottom: 18px;
  border-bottom: 2px solid var(--sd-border);
}
.sd-tab-btn {
  background: none;
  border: none;
  padding: 10px 22px;
  font-size: .95rem;
  font-weight: 600;
  color: var(--sd-muted);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: .15s;
}
.sd-tab-btn.sd-tab-active {
  color: var(--sd-primary);
  border-bottom-color: var(--sd-primary);
}

/* Forms */
.sd-form { display: flex; flex-direction: column; gap: 12px; }
.sd-form input, .sd-form select {
  padding: 10px 14px;
  border: 1.5px solid var(--sd-border);
  border-radius: 8px;
  font-size: .95rem;
  outline: none;
  transition: border .15s;
}
.sd-form input:focus, .sd-form select:focus { border-color: var(--sd-primary); }
.sd-error { color: #dc2626; font-size: .85rem; min-height: 1.2em; }

.sd-auth-card { max-width: 440px; margin: 40px auto; }

/* Buttons */
.sd-btn {
  background: var(--sd-primary);
  color: #fff;
  border: none;
  padding: 11px 22px;
  border-radius: 8px;
  font-size: .95rem;
  font-weight: 600;
  cursor: pointer;
  transition: background .15s;
}
.sd-btn:hover { background: var(--sd-primary-dark); }
.sd-btn:disabled { opacity: .45; cursor: not-allowed; }
.sd-btn-sm { padding: 7px 16px; font-size: .85rem; }
.sd-btn-outline {
  background: transparent;
  color: var(--sd-primary);
  border: 1.5px solid var(--sd-primary);
}
.sd-btn-outline:hover { background: #eef2ff; }
.sd-btn-ghost {
  background: transparent;
  color: var(--sd-muted);
}
.sd-btn-ghost:hover { color: var(--sd-text); background: #f1f5f9; }

/* Sticky questionnaire top bar */
.sd-q-sticky {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--sd-card);
  margin: -32px -32px 0;
  padding: 20px 32px 0;
  border-radius: var(--sd-radius) var(--sd-radius) 0 0;
  box-shadow: 0 2px 8px rgba(0,0,0,0);
  transition: box-shadow .2s;
}
.sd-q-sticky.sd-stuck {
  box-shadow: 0 4px 16px rgba(0,0,0,.08);
}

/* Questionnaire header */
.sd-q-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 12px;
}
.sd-q-header h2 { margin: 0; }
.sd-q-meta { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
#sd-q-progress {
  font-size: .85rem;
  font-weight: 600;
  color: var(--sd-primary);
  background: #eef2ff;
  padding: 5px 12px;
  border-radius: 20px;
}
.sd-q-info {
  color: var(--sd-muted);
  font-size: .9rem;
  margin-bottom: 14px;
}

/* Likert legend */
.sd-likert-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 16px;
  font-size: .78rem;
  color: var(--sd-muted);
  margin-bottom: 0;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--sd-border);
}

/* Question items */
.sd-q-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 12px 0;
  border-bottom: 1px solid var(--sd-border);
}
.sd-q-item:last-child { border-bottom: none; }
.sd-q-num {
  font-weight: 700;
  color: var(--sd-muted);
  font-size: .82rem;
  min-width: 30px;
}
.sd-q-text {
  flex: 1;
  font-size: .93rem;
}
.sd-q-options {
  display: flex;
  gap: 4px;
  flex-shrink: 0;
}
.sd-q-options label {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  border: 2px solid var(--sd-border);
  font-size: .82rem;
  font-weight: 600;
  cursor: pointer;
  transition: .15s;
  color: var(--sd-muted);
}
.sd-q-options label:hover { border-color: var(--sd-primary); color: var(--sd-primary); }
.sd-q-options input { display: none; }
.sd-q-options input:checked + span {
  /* parent label gets styled via JS class */
}
.sd-q-options label.sd-selected {
  background: var(--sd-primary);
  border-color: var(--sd-primary);
  color: #fff;
}

/* Results */
.sd-r-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 20px;
}
.sd-r-header h2 { margin: 0; }

#sd-network-container {
  margin-bottom: 28px;
}
#sd-network-container h3 {
  margin: 0 0 12px;
  font-size: 1.05rem;
}
#sd-network-svg {
  width: 100%;
  height: 520px;
  background: #fafbfd;
  border-radius: 8px;
  border: 1px solid var(--sd-border);
}

/* Table */
#sd-matches-table-wrap { overflow-x: auto; }
#sd-matches-table {
  width: 100%;
  border-collapse: collapse;
  font-size: .88rem;
}
#sd-matches-table th {
  background: #f1f5f9;
  padding: 10px 12px;
  text-align: left;
  font-weight: 700;
  font-size: .8rem;
  text-transform: uppercase;
  letter-spacing: .4px;
  color: var(--sd-muted);
  white-space: nowrap;
}
#sd-matches-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--sd-border);
}
#sd-matches-table tr:hover td { background: #f8fafc; }
.sd-match-pct {
  font-weight: 700;
  color: var(--sd-primary);
}

/* Responsive */
@media (max-width: 700px) {
  .sd-q-item { flex-direction: column; align-items: flex-start; gap: 8px; }
  .sd-q-options { align-self: flex-end; }
  .sd-q-header { flex-direction: column; align-items: flex-start; }
  .sd-card { padding: 20px 16px; }
  .sd-q-sticky { margin: -20px -16px 0; padding: 14px 16px 0; }
}