/* CakePortion — Birthday Cake Size & Slice Planner */
:root {
  --color-cream: #FFF8F0;
  --color-warm: #F5DEB3;
  --color-cake: #D4764E;
  --color-cake-dark: #B05A36;
  --color-cherry: #E85D75;
  --color-cherry-dark: #C7455E;
  --color-chocolate: #8B4513;
  --color-text: #2D1B14;
  --color-text-light: #5C4033;
  --color-bg-alt: #FFF0E0;
  --color-white: #FFFFFF;
  --color-border: #E8C9A0;
  --color-success: #4A8C5C;
  --color-error: #C0392B;
  --shadow-sm: 0 1px 3px rgba(45, 27, 20, 0.08);
  --shadow-md: 0 4px 12px rgba(45, 27, 20, 0.12);
  --shadow-lg: 0 8px 24px rgba(45, 27, 20, 0.16);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
  --max-width: 1120px;
  --transition: 0.2s ease;
}

*, *::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);
  color: var(--color-text);
  background-color: var(--color-cream);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

a:hover, a:focus {
  color: var(--color-cherry);
}

img, svg {
  max-width: 100%;
  height: auto;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.25rem;
}

.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  background: var(--color-cake);
  color: var(--color-white);
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  z-index: 1000;
  font-weight: 600;
  text-decoration: none;
}

.skip-link:focus {
  top: 1rem;
}

/* Header */
.site-header {
  background: var(--color-white);
  border-bottom: 2px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-sm);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
  gap: 1rem;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
  color: var(--color-text);
  font-weight: 700;
  font-size: 1.15rem;
  flex-shrink: 0;
}

.logo:hover, .logo:focus {
  color: var(--color-cake-dark);
}

.logo-text {
  letter-spacing: -0.02em;
}

.main-nav {
  display: flex;
  gap: 1.25rem;
  align-items: center;
}

.main-nav a {
  text-decoration: none;
  color: var(--color-text-light);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0.25rem 0;
  border-bottom: 2px solid transparent;
  transition: color var(--transition), border-color var(--transition);
}

.main-nav a:hover, .main-nav a:focus {
  color: var(--color-cake-dark);
  border-bottom-color: var(--color-cake);
}

/* Hero */
.hero {
  background: linear-gradient(135deg, var(--color-bg-alt) 0%, var(--color-cream) 60%, var(--color-warm) 100%);
  padding: 4rem 0 3.5rem;
  text-align: center;
}

.hero h1 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  line-height: 1.15;
  color: var(--color-chocolate);
  margin-bottom: 0.75rem;
  letter-spacing: -0.03em;
}

.hero-sub {
  font-size: clamp(1rem, 2vw, 1.2rem);
  color: var(--color-text-light);
  max-width: 560px;
  margin: 0 auto 1.5rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.6rem 1.25rem;
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  border: 2px solid transparent;
  transition: all var(--transition);
  text-decoration: none;
  line-height: 1.3;
}

.btn-primary {
  background: var(--color-cake);
  color: var(--color-white);
  border-color: var(--color-cake);
}

.btn-primary:hover, .btn-primary:focus {
  background: var(--color-cake-dark);
  border-color: var(--color-cake-dark);
  color: var(--color-white);
}

.btn-secondary {
  background: var(--color-white);
  color: var(--color-text);
  border-color: var(--color-border);
}

.btn-secondary:hover, .btn-secondary:focus {
  background: var(--color-bg-alt);
  border-color: var(--color-cake);
  color: var(--color-cake-dark);
}

.btn-sm {
  padding: 0.35rem 0.75rem;
  font-size: 0.82rem;
}

.btn-lg {
  padding: 0.85rem 2rem;
  font-size: 1.05rem;
}

/* Planner Section */
.planner-section {
  padding: 3rem 0 4rem;
}

.planner-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: start;
}

.planner-inputs h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
  color: var(--color-chocolate);
}

.form-group {
  margin-bottom: 1.1rem;
}

.form-group label {
  display: block;
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 0.3rem;
  color: var(--color-text);
}

.form-group input,
.form-group select {
  width: 100%;
  padding: 0.6rem 0.75rem;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-size: 0.95rem;
  color: var(--color-text);
  background: var(--color-white);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--color-cake);
  box-shadow: 0 0 0 3px rgba(212, 118, 78, 0.2);
}

.form-hint {
  display: block;
  font-size: 0.8rem;
  color: var(--color-text-light);
  margin-top: 0.2rem;
}

.preset-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.form-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.25rem;
}

.save-notice {
  margin-top: 0.75rem;
  font-size: 0.85rem;
  font-weight: 600;
  min-height: 1.4em;
}

.save-notice.success {
  color: var(--color-success);
}

.save-notice.error {
  color: var(--color-error);
}

/* Results */
.planner-results {
  position: sticky;
  top: 80px;
}

.results-card {
  background: var(--color-white);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-md);
}

.results-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-chocolate);
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--color-bg-alt);
}

.result-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--color-bg-alt);
}

.result-row:last-of-type {
  border-bottom: none;
}

.result-label {
  font-size: 0.88rem;
  color: var(--color-text-light);
  font-weight: 500;
}

.result-value {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-text);
}

/* Cutting Guide */
.cutting-guide {
  margin-top: 1.25rem;
  padding-top: 1rem;
  border-top: 2px solid var(--color-bg-alt);
  text-align: center;
}

.cutting-guide h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
  color: var(--color-text);
}

#cutting-svg-container {
  display: flex;
  justify-content: center;
  margin-bottom: 0.5rem;
}

#cutting-svg {
  max-width: 200px;
  width: 100%;
}

.cutting-text {
  font-size: 0.85rem;
  color: var(--color-text-light);
}

.result-actions {
  display: flex;
  gap: 0.5rem;
  margin-top: 1.25rem;
  padding-top: 1rem;
  border-top: 2px solid var(--color-bg-alt);
}

/* Info Sections */
.info-section {
  padding: 3.5rem 0;
}

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

.info-section h2 {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--color-chocolate);
  margin-bottom: 1.5rem;
  text-align: center;
}

.info-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.info-card {
  background: var(--color-white);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  text-align: center;
  box-shadow: var(--shadow-sm);
}

.info-icon {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.info-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 0.5rem;
}

.info-card p {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.55;
}

/* Scenarios */
.scenario-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.scenario-card {
  background: var(--color-white);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.scenario-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-cake-dark);
  margin-bottom: 0.5rem;
}

.scenario-card p {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.55;
  margin-bottom: 0.75rem;
}

.scenario-specs {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.25rem 0.75rem;
  font-size: 0.85rem;
}

.scenario-specs dt {
  font-weight: 600;
  color: var(--color-text);
}

.scenario-specs dd {
  color: var(--color-text-light);
}

/* Tips */
.tips-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2.5rem;
}

.tips-column h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-chocolate);
  margin-bottom: 0.75rem;
}

.tips-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.tips-list li {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.55;
  padding-left: 1.25rem;
  position: relative;
}

.tips-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
}

.tips-list.mistakes li::before {
  background: var(--color-cherry);
}

.tips-list.helpful li::before {
  background: var(--color-success);
}

/* FAQ */
.faq-section {
  margin-top: 2rem;
}

.faq-section h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-chocolate);
  margin-bottom: 0.75rem;
}

.faq-section details {
  background: var(--color-white);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  margin-bottom: 0.5rem;
  overflow: hidden;
}

.faq-section summary {
  padding: 0.75rem 1rem;
  font-weight: 600;
  font-size: 0.92rem;
  cursor: pointer;
  color: var(--color-text);
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.faq-section summary::-webkit-details-marker {
  display: none;
}

.faq-section summary::before {
  content: "+";
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--color-cake);
  flex-shrink: 0;
}

.faq-section details[open] summary::before {
  content: "−";
}

.faq-section details p {
  padding: 0 1rem 0.75rem;
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.55;
}

/* Footer */
.site-footer {
  background: var(--color-chocolate);
  color: var(--color-warm);
  padding: 2rem 0 1.5rem;
  margin-top: auto;
}

.footer-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1rem;
}

.site-footer .logo {
  color: var(--color-warm);
}

.footer-nav {
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
}

.footer-nav a {
  color: var(--color-warm);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 500;
}

.footer-nav a:hover, .footer-nav a:focus {
  color: var(--color-white);
  text-decoration: underline;
}

.footer-note {
  font-size: 0.82rem;
  opacity: 0.8;
  margin-bottom: 0.5rem;
}

.footer-copy {
  font-size: 0.8rem;
  opacity: 0.6;
}

/* Print */
@media print {
  .site-header,
  .site-footer,
  .hero,
  .planner-inputs,
  .result-actions,
  .preset-buttons,
  .form-actions,
  .save-notice {
    display: none !important;
  }

  body {
    background: white;
    color: black;
  }

  .planner-section {
    padding: 0;
  }

  .planner-grid {
    display: block;
  }

  .results-card {
    border: 1px solid #ccc;
    box-shadow: none;
  }

  .planner-results {
    position: static;
  }
}

/* Responsive */
@media (max-width: 900px) {
  .planner-grid {
    grid-template-columns: 1fr;
  }

  .planner-results {
    position: static;
  }

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

  .tips-layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 600px) {
  .site-header .container {
    flex-direction: column;
    height: auto;
    padding: 0.75rem 1rem;
    gap: 0.5rem;
  }

  .main-nav {
    gap: 0.75rem;
    flex-wrap: wrap;
    justify-content: center;
  }

  .hero {
    padding: 2.5rem 0 2rem;
  }

  .preset-buttons {
    flex-direction: column;
  }

  .form-actions {
    flex-direction: column;
  }

  .result-actions {
    flex-direction: column;
  }

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

  .footer-nav {
    justify-content: center;
  }
}

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

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *, *::before, *::after {
    transition-duration: 0.01ms !important;
  }
}



/* 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;
}