/* Small Space Acoustic Setup Sketch - Styles */
:root {
  --color-bg: #faf9f7;
  --color-surface: #ffffff;
  --color-surface-alt: #f0ede8;
  --color-text: #2d2a26;
  --color-text-secondary: #6b6560;
  --color-text-muted: #9e9890;
  --color-primary: #6C5CE7;
  --color-primary-light: #a29bfe;
  --color-primary-dark: #4a3fb5;
  --color-accent: #E17055;
  --color-accent-light: #fab1a0;
  --color-warning: #FDCB6E;
  --color-danger: #E74C3C;
  --color-success: #00b894;
  --color-border: #e0dbd4;
  --color-border-light: #ede9e3;
  --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, Oxygen, Ubuntu, Cantarell, sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', 'Fira Mono', monospace;
  --max-width: 1120px;
  --header-height: 64px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 16px);
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(250, 249, 247, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border-light);
  height: var(--header-height);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--color-text);
  font-weight: 700;
  font-size: 1.1rem;
}

.logo svg {
  flex-shrink: 0;
}

.main-nav {
  display: flex;
  gap: 8px;
}

.main-nav a {
  text-decoration: none;
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  transition: color 0.2s, background 0.2s;
}

.main-nav a:hover,
.main-nav a:focus {
  color: var(--color-primary);
  background: rgba(108, 92, 231, 0.06);
}

/* Hero */
.hero {
  padding: 80px 0 60px;
  text-align: center;
  background: linear-gradient(180deg, var(--color-surface) 0%, var(--color-bg) 100%);
}

.hero h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.02em;
  max-width: 640px;
  margin: 0 auto 16px;
}

.hero-sub {
  font-size: 1.15rem;
  color: var(--color-text-secondary);
  max-width: 560px;
  margin: 0 auto 32px;
  line-height: 1.5;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-size: 0.95rem;
  font-weight: 600;
  font-family: var(--font-sans);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  text-decoration: none;
  transition: all 0.2s;
  line-height: 1.2;
}

.btn-primary {
  background: var(--color-primary);
  color: white;
  box-shadow: 0 2px 8px rgba(108, 92, 231, 0.3);
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  box-shadow: 0 4px 16px rgba(108, 92, 231, 0.4);
  transform: translateY(-1px);
}

.btn-secondary {
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.btn-secondary:hover {
  background: var(--color-surface-alt);
  border-color: var(--color-text-muted);
}

.btn-sm {
  padding: 8px 14px;
  font-size: 0.85rem;
}

/* Sections */
section {
  padding: 60px 0;
}

section h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 12px;
}

.section-intro {
  color: var(--color-text-secondary);
  font-size: 1.05rem;
  max-width: 600px;
  margin-bottom: 36px;
}

/* Planner */
.planner-section {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border-light);
  border-bottom: 1px solid var(--color-border-light);
}

.planner-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}

@media (max-width: 860px) {
  .planner-grid {
    grid-template-columns: 1fr;
  }
}

.planner-controls {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.control-group {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
  background: var(--color-bg);
}

.control-group legend {
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0 8px;
  color: var(--color-text);
}

.field {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.field + .field {
  margin-top: 16px;
}

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

.field small {
  font-size: 0.78rem;
  color: var(--color-text-muted);
}

.field-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

input[type="number"],
input[type="text"],
select {
  padding: 10px 12px;
  font-size: 0.95rem;
  font-family: var(--font-sans);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-text);
  transition: border-color 0.2s, box-shadow 0.2s;
  -webkit-appearance: none;
}

input[type="number"]:focus,
input[type="text"]:focus,
select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(108, 92, 231, 0.15);
}

.input-with-unit {
  display: flex;
  gap: 4px;
}

.input-with-unit input {
  flex: 1;
  min-width: 0;
}

.input-with-unit select {
  width: 52px;
  padding-left: 6px;
  padding-right: 6px;
}

.preset-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.action-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.status-message {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  min-height: 1.4em;
}

.status-message.success {
  color: var(--color-success);
}

/* Sketch */
.planner-output {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.sketch-wrapper h3,
.placement-tips h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 12px;
}

.room-sketch {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--color-surface);
}

.room-sketch svg {
  width: 100%;
  height: auto;
  display: block;
}

.sketch-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  padding: 12px 16px;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-top: none;
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  font-size: 0.8rem;
  color: var(--color-text-secondary);
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.legend-color {
  display: inline-block;
  width: 12px;
  height: 12px;
  border-radius: 3px;
  flex-shrink: 0;
}

.placement-tips {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
}

.placement-tips ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.placement-tips li {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  padding-left: 20px;
  position: relative;
}

.placement-tips li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: 600;
}

/* Presets */
.presets-section {
  background: var(--color-bg);
}

.preset-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 20px;
}

.preset-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: box-shadow 0.2s, transform 0.2s;
}

.preset-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.preset-icon {
  margin-bottom: 16px;
}

.preset-card h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.preset-card p {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
  margin-bottom: 12px;
}

.preset-size {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--color-primary);
  background: rgba(108, 92, 231, 0.08);
  padding: 4px 10px;
  border-radius: 20px;
}

/* Tips */
.tips-section {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border-light);
  border-bottom: 1px solid var(--color-border-light);
}

.tips-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}

.tip-block {
  background: var(--color-bg);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  padding: 24px;
}

.tip-block h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 14px;
  color: var(--color-text);
}

.tip-block ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.tip-block li {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
  padding-left: 16px;
  position: relative;
}

.tip-block li::before {
  content: "•";
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-weight: 700;
}

.tip-block li strong {
  color: var(--color-text);
}

.tip-block p {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

/* FAQ */
.faq-section {
  background: var(--color-bg);
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 720px;
}

.faq-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border-light);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.faq-item summary {
  padding: 16px 20px;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  transition: background 0.2s;
}

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

.faq-item summary::after {
  content: "+";
  font-size: 1.2rem;
  font-weight: 400;
  color: var(--color-text-muted);
  flex-shrink: 0;
  transition: transform 0.2s;
}

.faq-item[open] summary::after {
  content: "−";
}

.faq-item summary:hover {
  background: var(--color-bg);
}

.faq-item p {
  padding: 0 20px 16px;
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* Why section */
.why-section {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border-light);
}

.why-section p {
  font-size: 1rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  max-width: 720px;
}

.last-updated {
  margin-top: 20px;
  font-size: 0.82rem;
  color: var(--color-text-muted);
}

/* Footer */
.site-footer {
  background: var(--color-text);
  color: rgba(255,255,255,0.7);
  padding: 40px 0 24px;
  font-size: 0.88rem;
}

.footer-grid {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 24px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.footer-logo {
  font-weight: 700;
  font-size: 1rem;
  color: white;
  display: block;
  margin-bottom: 4px;
}

.footer-brand p {
  font-size: 0.85rem;
  max-width: 280px;
}

.footer-links {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}

.footer-links a {
  color: rgba(255,255,255,0.7);
  text-decoration: none;
  transition: color 0.2s;
}

.footer-links a:hover {
  color: white;
}

.footer-note {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.4);
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 16px;
}

.footer-note a {
  color: rgba(255,255,255,0.6);
  text-decoration: none;
}

.footer-note a:hover {
  color: white;
}

/* Responsive */
@media (max-width: 640px) {
  .main-nav {
    display: none;
  }
  
  .hero {
    padding: 48px 0 40px;
  }
  
  section {
    padding: 40px 0;
  }
  
  .field-row {
    grid-template-columns: 1fr;
  }
  
  .action-row {
    flex-direction: column;
  }
  
  .action-row .btn {
    width: 100%;
  }
  
  .preset-cards {
    grid-template-columns: 1fr;
  }
  
  .tips-grid {
    grid-template-columns: 1fr;
  }
  
  .sketch-legend {
    flex-direction: column;
    gap: 8px;
  }
}

/* Print */
@media print {
  .site-header,
  .site-footer,
  .planner-controls,
  .action-row,
  .presets-section,
  .tips-section,
  .faq-section,
  .why-section {
    display: none !important;
  }
  
  .planner-section {
    border: none;
    padding: 0;
  }
  
  .planner-grid {
    grid-template-columns: 1fr;
  }
  
  .room-sketch {
    border: 2px solid #333;
  }
}

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

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-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;
}