/* ===== CSS Custom Properties ===== */
:root {
  --color-bg: #faf9f7;
  --color-surface: #ffffff;
  --color-surface-alt: #f0eeea;
  --color-text: #2c2a26;
  --color-text-secondary: #6b6560;
  --color-text-muted: #9a948e;
  --color-primary: #2a7c76;
  --color-primary-hover: #236863;
  --color-primary-light: #e4f2f0;
  --color-accent: #c4784a;
  --color-accent-light: #fdf0e8;
  --color-border: #e0dbd6;
  --color-focus: #2a7c76;
  --color-success: #3a8c5c;
  --color-error: #c44a4a;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 30px rgba(0,0,0,0.1);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-md: 1.125rem;
  --font-size-lg: 1.375rem;
  --font-size-xl: 1.75rem;
  --font-size-2xl: 2.25rem;
  --font-size-3xl: 2.75rem;
  --line-height-tight: 1.2;
  --line-height-normal: 1.6;
  --line-height-relaxed: 1.75;
  --max-width: 720px;
  --max-width-wide: 960px;
  --transition: 0.2s ease;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

img, svg {
  display: block;
  max-width: 100%;
}

a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 2px;
}

a:hover {
  color: var(--color-primary-hover);
}

button {
  font-family: inherit;
  font-size: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

fieldset {
  border: none;
  padding: 0;
  margin: 0;
}

legend {
  padding: 0;
}

/* ===== Accessibility ===== */
.skip-link {
  position: absolute;
  top: -100%;
  left: 16px;
  background: var(--color-primary);
  color: #fff;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  z-index: 1000;
  font-weight: 600;
  text-decoration: none;
}

.skip-link:focus {
  top: 16px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* ===== Focus Styles ===== */
:focus-visible {
  outline: 3px solid var(--color-focus);
  outline-offset: 2px;
  border-radius: 2px;
}

/* ===== Container ===== */
.container {
  width: 100%;
  max-width: var(--max-width-wide);
  margin: 0 auto;
  padding: 0 20px;
}

/* ===== Header ===== */
.site-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
  max-width: var(--max-width-wide);
}

.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: var(--font-size-sm);
  color: var(--color-text);
  text-decoration: none;
  white-space: nowrap;
}

.logo svg {
  color: var(--color-primary);
  flex-shrink: 0;
}

.site-nav {
  display: flex;
  gap: 20px;
}

.site-nav a {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition);
}

.site-nav a:hover {
  color: var(--color-primary);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  padding: 4px;
}

.nav-toggle-bar {
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 1px;
  transition: transform var(--transition), opacity var(--transition);
}

.nav-menu {
  display: none;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 8px 20px;
}

.nav-menu a {
  display: block;
  padding: 10px 0;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  text-decoration: none;
  font-weight: 500;
  border-bottom: 1px solid var(--color-border);
}

.nav-menu a:last-child {
  border-bottom: none;
}

.nav-menu:not([hidden]) {
  display: block;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 20px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: var(--font-size-sm);
  text-decoration: none;
  transition: background var(--transition), color var(--transition), box-shadow var(--transition), border-color var(--transition);
  border: 2px solid transparent;
  line-height: 1.3;
}

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

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

.btn-ghost {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-border);
}

.btn-ghost:hover {
  background: var(--color-primary-light);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.btn-lg {
  padding: 14px 28px;
  font-size: var(--font-size-base);
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

/* ===== Hero ===== */
.hero {
  padding: 64px 0 56px;
  text-align: center;
}

.hero-tag {
  display: inline-block;
  font-size: var(--font-size-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--color-primary);
  background: var(--color-primary-light);
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 16px;
}

.hero h1 {
  font-size: var(--font-size-3xl);
  line-height: var(--line-height-tight);
  margin-bottom: 16px;
  color: var(--color-text);
}

.hero-sub {
  font-size: var(--font-size-md);
  color: var(--color-text-secondary);
  max-width: 560px;
  margin: 0 auto 28px;
  line-height: var(--line-height-relaxed);
}

.hero-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.hero-note {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

/* ===== Quiz Section ===== */
.quiz-section {
  padding: 0 0 64px;
}

.quiz-shell {
  max-width: var(--max-width);
  margin: 0 auto;
}

.quiz-progress {
  position: relative;
  background: var(--color-surface-alt);
  border-radius: var(--radius-md);
  height: 40px;
  margin-bottom: 24px;
  overflow: hidden;
  display: flex;
  align-items: center;
  padding: 0 16px;
}

.quiz-progress-bar {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  background: var(--color-primary-light);
  border-radius: var(--radius-md);
  transition: width 0.3s ease;
  width: 0%;
}

.quiz-progress-text {
  position: relative;
  z-index: 1;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text-secondary);
}

.quiz-card {
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: 40px;
  border: 1px solid var(--color-border);
}

.quiz-start h2 {
  font-size: var(--font-size-xl);
  margin-bottom: 12px;
}

.quiz-start p {
  color: var(--color-text-secondary);
  margin-bottom: 24px;
  line-height: var(--line-height-relaxed);
}

.quiz-presets {
  background: var(--color-surface-alt);
  border-radius: var(--radius-md);
  padding: 20px;
  margin-bottom: 28px;
}

.quiz-presets-label {
  font-weight: 600;
  font-size: var(--font-size-sm);
  margin-bottom: 8px;
  color: var(--color-text);
}

.quiz-prompts {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.quiz-prompts li {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  padding-left: 20px;
  position: relative;
}

.quiz-prompts li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 8px;
  height: 8px;
  background: var(--color-primary);
  border-radius: 50%;
}

.quiz-q-number {
  font-size: var(--font-size-xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.quiz-q-text {
  font-size: var(--font-size-lg);
  line-height: var(--line-height-tight);
  margin-bottom: 24px;
}

.quiz-options {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 28px;
}

.quiz-option {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition);
  background: var(--color-bg);
}

.quiz-option:hover {
  border-color: var(--color-primary);
  background: var(--color-primary-light);
}

.quiz-option.selected {
  border-color: var(--color-primary);
  background: var(--color-primary-light);
}

.quiz-option input[type="radio"] {
  margin-top: 3px;
  accent-color: var(--color-primary);
  flex-shrink: 0;
}

.quiz-option-label {
  font-size: var(--font-size-sm);
  line-height: var(--line-height-normal);
  color: var(--color-text);
}

.quiz-nav-btns {
  display: flex;
  gap: 12px;
  justify-content: flex-end;
}

/* ===== Results ===== */
.quiz-results h2 {
  font-size: var(--font-size-xl);
  text-align: center;
  margin-bottom: 24px;
}

.result-band {
  text-align: center;
  padding: 32px 24px;
  border-radius: var(--radius-lg);
  margin-bottom: 32px;
}

.result-band--listener {
  background: #e4f2f0;
}

.result-band--sharer {
  background: #fdf0e8;
}

.result-band--balanced {
  background: #e8f5e9;
}

.result-band--developing {
  background: #f3e8fd;
}

.result-icon {
  font-size: 48px;
  margin-bottom: 12px;
}

.result-title {
  font-size: var(--font-size-lg);
  margin-bottom: 8px;
}

.result-desc {
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
  max-width: 480px;
  margin: 0 auto;
}

.result-details {
  margin-bottom: 28px;
}

.result-details h4 {
  font-size: var(--font-size-sm);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--color-text-muted);
  margin-bottom: 6px;
  margin-top: 20px;
}

.result-details h4:first-child {
  margin-top: 0;
}

.result-details p {
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
}

.result-breakdown {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.result-breakdown-item {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: var(--font-size-sm);
}

.result-breakdown-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

.result-breakdown-dot--listener { background: #2a7c76; }
.result-breakdown-dot--sharer { background: #c4784a; }
.result-breakdown-dot--balanced { background: #3a8c5c; }
.result-breakdown-dot--developing { background: #8b5cf6; }

.result-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 20px;
}

.result-disclaimer {
  text-align: center;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  line-height: var(--line-height-relaxed);
}

/* ===== Info Sections ===== */
.info-section {
  padding: 64px 0;
}

.info-section--alt {
  background: var(--color-surface);
}

.info-section h2 {
  font-size: var(--font-size-2xl);
  text-align: center;
  margin-bottom: 40px;
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.info-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  text-align: center;
}

.info-num {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-primary-light);
  color: var(--color-primary);
  font-weight: 700;
  font-size: var(--font-size-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
}

.info-card h3 {
  font-size: var(--font-size-md);
  margin-bottom: 8px;
}

.info-card p {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
}

/* ===== About Section ===== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}

.about-text p {
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
  margin-bottom: 16px;
}

.about-tips h3 {
  font-size: var(--font-size-md);
  margin-bottom: 12px;
}

.about-tips ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 24px;
}

.about-tips li {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
  padding-left: 20px;
  position: relative;
}

.about-tips li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 8px;
  width: 8px;
  height: 8px;
  background: var(--color-accent);
  border-radius: 50%;
}

.about-tips li strong {
  color: var(--color-text);
}

.about-tips p {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
}

/* ===== Assumptions Section ===== */
.assumptions-section {
  padding: 64px 0;
  background: var(--color-surface-alt);
}

.assumptions-section h2 {
  font-size: var(--font-size-2xl);
  text-align: center;
  margin-bottom: 40px;
}

.assumptions-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.assumption-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
}

.assumption-card h3 {
  font-size: var(--font-size-md);
  margin-bottom: 8px;
}

.assumption-card p {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
}

/* ===== FAQ Section ===== */
.faq-section {
  padding: 64px 0;
}

.faq-section h2 {
  font-size: var(--font-size-2xl);
  text-align: center;
  margin-bottom: 40px;
}

.faq-list {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0;
}

.faq-item {
  border-bottom: 1px solid var(--color-border);
}

.faq-item:first-child {
  border-top: 1px solid var(--color-border);
}

.faq-q {
  width: 100%;
  text-align: left;
  padding: 18px 0;
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-text);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.faq-q::after {
  content: "+";
  font-size: var(--font-size-lg);
  font-weight: 400;
  color: var(--color-primary);
  flex-shrink: 0;
  transition: transform var(--transition);
}

.faq-q[aria-expanded="true"]::after {
  content: "−";
}

.faq-q:hover {
  color: var(--color-primary);
}

.faq-a {
  padding-bottom: 18px;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
}

/* ===== Footer ===== */
.site-footer {
  margin-top: auto;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: 40px 0 24px;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  gap: 32px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.footer-brand {
  max-width: 320px;
}

.footer-logo {
  font-weight: 700;
  font-size: var(--font-size-md);
  color: var(--color-text);
  display: block;
  margin-bottom: 8px;
}

.footer-brand p {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
}

.footer-links nav {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-links a {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  text-decoration: none;
  font-weight: 500;
}

.footer-links a:hover {
  color: var(--color-primary);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  padding-top: 20px;
  border-top: 1px solid var(--color-border);
}

.footer-bottom p {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.footer-bottom a {
  color: var(--color-text-muted);
  text-decoration: underline;
}

.footer-bottom a:hover {
  color: var(--color-primary);
}

/* ===== Toast ===== */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background: var(--color-text);
  color: #fff;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  z-index: 1000;
  transition: transform 0.3s ease;
  pointer-events: none;
}

.toast.show {
  transform: translateX(-50%) translateY(0);
}

/* ===== Print Styles ===== */
@media print {
  .site-header,
  .site-footer,
  .hero,
  .info-section,
  .assumptions-section,
  .faq-section,
  .result-actions,
  .quiz-progress,
  .quiz-nav-btns,
  .toast {
    display: none !important;
  }

  body {
    background: #fff;
    color: #000;
  }

  .quiz-card {
    box-shadow: none;
    border: none;
    padding: 0;
  }

  .result-band {
    border: 2px solid #ccc;
  }
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .site-nav {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .hero {
    padding: 48px 0 40px;
  }

  .hero h1 {
    font-size: var(--font-size-2xl);
  }

  .hero-sub {
    font-size: var(--font-size-base);
  }

  .quiz-card {
    padding: 24px;
  }

  .info-grid {
    grid-template-columns: 1fr;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .assumptions-grid {
    grid-template-columns: 1fr;
  }

  .result-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .result-actions .btn {
    width: 100%;
  }

  .footer-top {
    flex-direction: column;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: center;
  }

  .hero-actions .btn {
    width: 100%;
    max-width: 280px;
  }

  .quiz-card {
    padding: 20px;
  }

  .quiz-nav-btns {
    flex-direction: column;
  }

  .quiz-nav-btns .btn {
    width: 100%;
  }
}


/* Factory-injected deployment helpers. The AI owns the site design above this block. */
.ad-unit {
  width: min(100%, 720px);
  min-height: 120px;
  margin: 24px auto;
  display: block;
}

.legal-page {
  width: min(900px, calc(100% - 32px));
  margin: 40px auto;
}

.factory-fallback-nav {
  width: min(900px, calc(100% - 32px));
  margin: 24px auto 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  align-items: center;
  font-size: 0.95rem;
}

.factory-fallback-nav a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px solid currentColor;
}