:root {
  --scaffold: #0D0F1A;
  --body-bg:  #1A1D29;
  --card:     #2A3040;
  --elevated: #353B4D;
  --accent:   #00D4FF;
  --accent-hover: #33DDFF;
  --text:     #E4E4F0;
  --text-muted: #B0B0C8;
  --text-dim: #ABABAB;
  --border:   rgba(255, 255, 255, 0.08);
  --success:  #00C853;
  --warning:  #FFD600;
  --error:    #D32F2F;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: Inter, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--scaffold);
  color: var(--text);
  line-height: 1.6;
  font-size: 16px;
}

.container {
  max-width: 780px;
  margin: 0 auto;
  padding: 0 24px;
}

/* HEADER */
header {
  background: var(--body-bg);
  border-bottom: 1px solid var(--border);
  padding: 16px 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

/* === Header — compact app-style === */
.tool-header {
  background: #1a1d29;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  padding: 16px 0;
}
.header-inner {
  display: flex;
  align-items: center;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 32px;
  gap: 32px;
}
.logo {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  flex-shrink: 0;
}
.logo-img {
  width: 40px;
  height: 40px;
  display: block;
}
.logo-text {
  color: #00d4ff;
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.01em;
  white-space: nowrap;
}
.tool-nav {
  display: flex;
  align-items: center;
  gap: 24px;
}
.tool-nav a {
  color: #E4E4F0;
  text-decoration: none;
  font-size: 15px;
  font-weight: 500;
  transition: color 0.15s ease;
  white-space: nowrap;
}
.tool-nav a:hover { color: #00d4ff; }
.tool-nav a[aria-current="page"] {
  color: #00d4ff;
  font-weight: 600;
}
.header-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: #00d4ff;
  color: #1a1d29;
  font-weight: 600;
  font-size: 15px;
  padding: 12px 24px;
  border-radius: 10px;
  text-decoration: none;
  white-space: nowrap;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
  flex-shrink: 0;
  margin-left: auto;
}
.header-cta:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(0, 212, 255, 0.3);
}
@media (max-width: 768px) {
  .tool-nav { display: none; }
  .header-inner { padding: 0 20px; gap: 16px; }
  .logo-img { width: 36px; height: 36px; }
  .logo-text { font-size: 16px; }
  .header-cta { padding: 10px 18px; font-size: 14px; }
}

/* HERO + TOOL */
.hero {
  background: var(--body-bg);
  padding: 48px 0 32px;
}

h1 {
  font-size: 40px;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.hero-sub {
  color: var(--text-muted);
  font-size: 18px;
  margin-bottom: 32px;
}

/* TOOL CARD */
.tool-card {
  background: var(--card);
  border-radius: 16px;
  padding: 32px;
  margin-bottom: 16px;
  box-shadow: 0 4px 20px rgba(0, 212, 255, 0.08);
}

.tool-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}

.tool-label label {
  font-weight: 500;
  font-size: 14px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.dont-know {
  font-size: 13px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  user-select: none;
}

.dont-know input[type="checkbox"] {
  accent-color: var(--accent);
  cursor: pointer;
}

.input-wrap {
  position: relative;
}

input[type="number"], input[type="text"], input[type="email"], select {
  width: 100%;
  background: var(--elevated);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 16px;
  color: var(--text);
  font-size: 18px;
  font-family: inherit;
  transition: border-color 0.15s, box-shadow 0.15s;
}

input:focus, select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.15);
}

input:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.input-hint {
  font-size: 13px;
  color: var(--text-dim);
  margin-top: 8px;
}

/* RESULT CARD */
.result-card {
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.08), rgba(0, 212, 255, 0.02));
  border: 1px solid rgba(0, 212, 255, 0.2);
  border-radius: 16px;
  padding: 28px;
  margin-bottom: 16px;
  display: none;
}

.result-card.visible {
  display: block;
  animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.result-label {
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.result-headline {
  font-size: 36px;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 12px;
  line-height: 1.1;
}

.result-context {
  color: var(--text);
  font-size: 16px;
  margin-bottom: 16px;
}

.result-caveat {
  background: rgba(255, 214, 0, 0.08);
  border-left: 3px solid var(--warning);
  padding: 12px 16px;
  border-radius: 6px;
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 20px;
}

.ai-cta {
  background: var(--accent);
  color: var(--body-bg);
  border: none;
  padding: 14px 24px;
  border-radius: 10px;
  font-weight: 700;
  font-size: 16px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: inherit;
  transition: background 0.15s, transform 0.1s;
}

.ai-cta:hover { background: var(--accent-hover); }
.ai-cta:active { transform: translateY(1px); }

.ai-cta .arrow { transition: transform 0.2s; }
.ai-cta:hover .arrow { transform: translateX(4px); }

/* SUPPORTING COPY */
.content-section {
  background: var(--body-bg);
  padding: 48px 0;
}

.content-section h2 {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 20px;
  letter-spacing: -0.01em;
}

.content-section h3 {
  font-size: 20px;
  font-weight: 600;
  margin: 28px 0 12px;
  color: var(--text);
}

.content-section p {
  color: var(--text-muted);
  margin-bottom: 16px;
  font-size: 16px;
  line-height: 1.7;
}

.content-section strong { color: var(--text); }

/* LOOKUP TABLE */
.lookup-table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  background: var(--card);
  border-radius: 12px;
  overflow: hidden;
}

.lookup-table th {
  background: var(--elevated);
  text-align: left;
  padding: 14px 20px;
  font-weight: 600;
  font-size: 14px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.lookup-table td {
  padding: 12px 20px;
  border-top: 1px solid var(--border);
  color: var(--text);
}

.lookup-table td:first-child { font-weight: 500; }
.lookup-table td:last-child { color: var(--accent); font-weight: 600; }

/* FAQ */
.faq-section {
  background: var(--scaffold);
  padding: 48px 0;
}

.faq-item {
  background: var(--card);
  border-radius: 12px;
  margin-bottom: 12px;
  overflow: hidden;
}

.faq-q {
  padding: 20px 24px;
  cursor: pointer;
  font-weight: 600;
  font-size: 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  user-select: none;
}

.faq-q:hover { background: var(--elevated); }

.faq-q .chevron {
  color: var(--accent);
  transition: transform 0.2s;
  font-size: 14px;
}

.faq-item.open .chevron { transform: rotate(180deg); }

.faq-a {
  padding: 0 24px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.25s ease-out, padding 0.25s;
  color: var(--text-muted);
}

.faq-item.open .faq-a {
  padding: 0 24px 20px;
  max-height: 400px;
}

/* RELATED TOOLS */
.related-section {
  background: var(--body-bg);
  padding: 48px 0;
}

.related-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
  margin-top: 20px;
}

@media (max-width: 600px) {
  .related-grid { grid-template-columns: 1fr; }
  h1 { font-size: 32px; }
  .result-headline { font-size: 28px; }
  .tool-card { padding: 24px 20px; }
}

.related-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  text-decoration: none;
  color: var(--text);
  transition: border-color 0.15s, transform 0.15s;
  display: block;
}

.related-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.related-card-title,
h3.related-card-title {
  font-weight: 600;
  font-size: 15px;
  margin: 0 0 4px 0;
}

.related-card-desc {
  font-size: 13px;
  color: var(--text-muted);
}

/* UPGRADE CTA */
.upgrade-section {
  background: linear-gradient(135deg, var(--body-bg) 0%, rgba(0, 212, 255, 0.1) 100%);
  padding: 56px 0;
  text-align: center;
}

.upgrade-section h2 {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 12px;
}

.upgrade-section p {
  color: var(--text-muted);
  margin-bottom: 24px;
  font-size: 17px;
}

.upgrade-cta {
  background: var(--accent);
  color: var(--body-bg);
  padding: 16px 32px;
  border-radius: 12px;
  text-decoration: none;
  font-weight: 700;
  font-size: 16px;
  display: inline-block;
  transition: background 0.15s, transform 0.1s;
}

.upgrade-cta:hover { background: var(--accent-hover); }
.upgrade-cta:active { transform: translateY(1px); }

/* === Standardized footer (Phase 1) === */
.tool-footer {
  padding: 32px 0 48px;
  border-top: 1px solid var(--border);
  margin-top: 64px;
  background: var(--scaffold);
  text-align: center;
}
.footer-links { margin: 0 0 8px; font-size: 0.9rem; }
.footer-links a { color: var(--text-muted); text-decoration: none; }
.footer-links a:hover { color: var(--text); }
.footer-links .sep { color: var(--text-dim); margin: 0 8px; }
.footer-copy { margin: 0; font-size: 0.8rem; color: var(--text-dim); }

/* MODAL */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.75);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 20px;
  overflow-y: auto;
}

.modal-backdrop.visible {
  display: flex;
}

.modal {
  background: var(--body-bg);
  border-radius: 16px;
  max-width: 520px;
  width: 100%;
  padding: 32px;
  position: relative;
  max-height: 90vh;
  overflow-y: auto;
  animation: modalIn 0.2s ease-out;
}

@keyframes modalIn {
  from { opacity: 0; transform: scale(0.96); }
  to { opacity: 1; transform: scale(1); }
}

.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 24px;
  line-height: 1;
  padding: 4px 8px;
}

.modal-close:hover { color: var(--text); }

.modal h2 {
  font-size: 24px;
  margin-bottom: 8px;
}

.modal-sub {
  color: var(--text-muted);
  margin-bottom: 24px;
  font-size: 15px;
}

.field-group {
  margin-bottom: 16px;
}

.field-group label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
  margin-bottom: 8px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.chip-group {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.chip {
  background: var(--elevated);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 16px;
  cursor: pointer;
  font-size: 14px;
  color: var(--text);
  font-family: inherit;
  transition: all 0.15s;
}

.chip:hover { border-color: var(--accent); }

.chip.selected {
  background: rgba(0, 212, 255, 0.12);
  border-color: var(--accent);
  color: var(--accent);
}

.locked-input {
  background: var(--scaffold);
  padding: 12px 16px;
  border-radius: 8px;
  color: var(--text-muted);
  font-size: 14px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.locked-input .value { color: var(--accent); font-weight: 600; }

.newsletter-row {
  background: var(--card);
  padding: 16px;
  border-radius: 10px;
  margin: 20px 0 16px;
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

.newsletter-row input[type="checkbox"] {
  margin-top: 3px;
  accent-color: var(--accent);
  cursor: pointer;
  transform: scale(1.15);
}

.newsletter-row label {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.5;
  cursor: pointer;
}

.newsletter-row label strong { color: var(--text); }

.turnstile-placeholder {
  background: var(--card);
  border: 1px dashed var(--border);
  border-radius: 8px;
  padding: 20px;
  text-align: center;
  color: var(--text-dim);
  font-size: 13px;
  margin-bottom: 16px;
  font-family: monospace;
}

.modal-submit {
  background: var(--accent);
  color: var(--body-bg);
  border: none;
  padding: 14px 24px;
  border-radius: 10px;
  font-weight: 700;
  font-size: 16px;
  cursor: pointer;
  width: 100%;
  font-family: inherit;
  transition: background 0.15s;
}

.modal-submit:hover { background: var(--accent-hover); }
.modal-submit:disabled { opacity: 0.5; cursor: not-allowed; }

.modal-disclosure {
  font-size: 12px;
  color: var(--text-dim);
  text-align: center;
  margin-top: 12px;
  line-height: 1.5;
}

/* CONFIRMATION STATE */
.confirmation {
  text-align: center;
  padding: 20px 0;
}

.confirmation-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: rgba(0, 200, 83, 0.15);
  color: var(--success);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  margin: 0 auto 20px;
}

.confirmation h2 { margin-bottom: 8px; }

.confirmation p {
  color: var(--text-muted);
  margin-bottom: 16px;
}

.confirmation-email {
  background: var(--card);
  padding: 10px 16px;
  border-radius: 8px;
  color: var(--accent);
  font-weight: 500;
  display: inline-block;
  margin: 4px 0 20px;
  font-size: 14px;
}

/* APPENDIX */
.appendix {
  background: var(--scaffold);
  padding: 48px 0;
  border-top: 2px dashed var(--accent);
}

.appendix-banner {
  background: rgba(0, 212, 255, 0.08);
  border: 1px solid rgba(0, 212, 255, 0.2);
  border-radius: 10px;
  padding: 14px 20px;
  margin-bottom: 32px;
  font-size: 14px;
  color: var(--text);
}

.appendix-banner strong { color: var(--accent); }

.tool-variant {
  background: var(--card);
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 16px;
}

.tool-variant h3 {
  color: var(--accent);
  margin-bottom: 12px;
  font-size: 18px;
}

.tool-variant dl {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 10px 20px;
  font-size: 14px;
}

.tool-variant dt {
  color: var(--text-muted);
  font-weight: 500;
}

.tool-variant dd { color: var(--text); }

@media (max-width: 600px) {
  .tool-variant dl { grid-template-columns: 1fr; gap: 4px; }
  .tool-variant dt { margin-top: 8px; }
}

/* Tool 2 result pair */
.result-pair { display: flex; gap: 16px; }
.result-card-half { flex: 1; }
@media (max-width: 768px) { .result-pair { flex-direction: column; } }

/* Crossover handoff */
.crossover-handoff { margin-top: 16px; padding: 16px; background: var(--card); border-radius: 12px; border-left: 3px solid var(--accent); }
.handoff-label { font-size: 13px; font-weight: 600; color: var(--accent); margin-bottom: 8px; text-transform: uppercase; letter-spacing: 0.5px; }
.crossover-handoff p { font-size: 14px; color: var(--text-muted); margin: 8px 0 12px; }

/* Handoff banner */
.handoff-banner { padding: 12px 16px; background: rgba(0,212,255,0.08); border-left: 3px solid var(--accent); border-radius: 8px; margin-bottom: 20px; font-size: 14px; color: var(--text-muted); }
.handoff-banner strong { color: var(--text); }

/* Modal stubs — Week 2 */
.modal-overlay { display: none; position: fixed; inset: 0; z-index: 10000; background: rgba(0,0,0,0.7); align-items: center; justify-content: center; }
.modal-content { background: var(--card); border-radius: 16px; max-width: 480px; width: 90%; padding: 32px; position: relative; }
.modal-close { position: absolute; top: 12px; right: 12px; background: none; border: none; color: var(--text-muted); font-size: 20px; cursor: pointer; }