:root {
  --bg: #ffffff;
  --surface: #f7f6f2;
  --surface-alt: #efede7;
  --ink: #191b1a;
  --ink-muted: #575a56;
  --ink-subtle: #80837e;
  --accent: #1e433d;
  --accent-hover: #15312c;
  --accent-tint: rgba(30, 67, 61, 0.08);
  --border: #e3e1da;
  --border-strong: #c8c5bc;

  --font-display: 'Newsreader', Georgia, serif;
  --font-sans: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, SFMono-Regular, monospace;

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  background: var(--bg);
  color: var(--ink);
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink);
  background: var(--bg);
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

button,
input,
select {
  font: inherit;
  color: inherit;
}

a {
  color: inherit;
  text-decoration: none;
}

.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 clamp(20px, 4vw, 44px);
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 10px;
  white-space: nowrap;
}

.brand-name {
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 500;
  letter-spacing: -0.02em;
}

.brand-city {
  font-size: 13px;
  color: var(--ink-muted);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-links a {
  font-size: 14px;
  color: var(--ink-muted);
  transition: color 0.2s var(--ease);
}

.nav-links a:hover {
  color: var(--ink);
}

.header-right {
  display: flex;
  align-items: center;
  gap: 18px;
}

.phone-link {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ink-muted);
}

.phone-link:hover {
  color: var(--ink);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 22px;
  font-size: 14px;
  font-weight: 500;
  border-radius: 4px;
  border: 1px solid var(--accent);
  cursor: pointer;
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease);
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent);
  color: #ffffff;
}

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

.btn-secondary {
  background: var(--bg);
  color: var(--ink);
  border-color: var(--border-strong);
}

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

.btn-sm {
  padding: 9px 16px;
  font-size: 13.5px;
}

/* Hero */
.hero {
  padding: clamp(44px, 6vw, 80px) 0 clamp(48px, 6vw, 72px);
  border-bottom: 1px solid var(--border);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1.05fr;
  gap: clamp(32px, 5vw, 64px);
  align-items: center;
}

.hero-kicker {
  font-size: 13px;
  font-weight: 500;
  color: var(--accent);
  margin-bottom: 16px;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(40px, 5vw, 64px);
  font-weight: 400;
  line-height: 1.06;
  letter-spacing: -0.025em;
  margin: 0 0 20px;
}

.hero-lead {
  font-size: 17.5px;
  color: var(--ink-muted);
  max-width: 500px;
  margin: 0 0 32px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 36px;
}

.hero-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 28px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  font-size: 13.5px;
  color: var(--ink-muted);
}

.hero-facts strong {
  display: block;
  color: var(--ink);
  font-weight: 600;
}

.photo-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  overflow: hidden;
}

.photo-card img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.photo-caption {
  padding: 12px 16px;
  font-size: 12.5px;
  color: var(--ink-muted);
  display: flex;
  justify-content: space-between;
  gap: 12px;
  border-top: 1px solid var(--border);
}

/* Sections */
.section {
  padding: clamp(56px, 7vw, 96px) 0;
  border-bottom: 1px solid var(--border);
}

.section-tint {
  background: var(--surface);
}

.section-head {
  max-width: 660px;
  margin-bottom: clamp(32px, 4vw, 48px);
}

.section-head h2 {
  font-family: var(--font-display);
  font-size: clamp(32px, 3.8vw, 46px);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin: 0 0 14px;
}

.section-head p {
  margin: 0;
  color: var(--ink-muted);
  font-size: 16.5px;
}

/* Services */
.service-tabs {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 32px;
  padding: 5px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
}

.service-tab {
  background: transparent;
  border: none;
  padding: 10px 18px;
  border-radius: 4px;
  font-size: 14px;
  font-weight: 500;
  color: var(--ink-muted);
  cursor: pointer;
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease);
}

.service-tab:hover {
  color: var(--ink);
}

.service-tab.active {
  background: var(--bg);
  color: var(--ink);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06);
}

.service-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(28px, 4vw, 56px);
  align-items: center;
}

.service-copy h3 {
  font-family: var(--font-display);
  font-size: 32px;
  font-weight: 400;
  line-height: 1.18;
  margin: 0 0 14px;
}

.service-copy p {
  color: var(--ink-muted);
  margin: 0 0 24px;
}

.spec-table {
  width: 100%;
  border-collapse: collapse;
  border-top: 1px solid var(--border);
}

.spec-table td {
  padding: 13px 0;
  border-bottom: 1px solid var(--border);
  font-size: 14.5px;
}

.spec-table td:last-child {
  text-align: right;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ink-muted);
}

/* Light-Mode Sound & Draft Lab */
.lab-shell {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: clamp(24px, 4vw, 48px);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: clamp(24px, 4vw, 40px);
}

.preset-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: 24px;
}

.preset-btn {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 13px 14px;
  text-align: left;
  cursor: pointer;
  transition: border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.preset-btn:hover {
  border-color: var(--border-strong);
}

.preset-btn.active {
  background: var(--accent-tint);
  border-color: var(--accent);
}

.preset-btn .p-sub {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-muted);
  margin-bottom: 4px;
}

.preset-btn .p-title {
  display: block;
  font-size: 14px;
  font-weight: 500;
}

.slider-wrap {
  margin-bottom: 24px;
}

.slider-top {
  display: flex;
  justify-content: space-between;
  font-size: 13.5px;
  font-weight: 500;
  margin-bottom: 10px;
}

.range-slider {
  width: 100%;
  accent-color: var(--accent);
  cursor: pointer;
}

.lab-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  padding: 18px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  margin-bottom: 20px;
}

.lab-metric-val {
  font-family: var(--font-display);
  font-size: 32px;
  line-height: 1.05;
}

.lab-metric-lbl {
  font-size: 12px;
  color: var(--ink-muted);
  margin-top: 4px;
}

.audio-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
}

.diagram-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.diagram-svg {
  width: 100%;
  height: auto;
  max-height: 270px;
}

/* Neighborhoods */
.hood-grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: clamp(24px, 4vw, 52px);
  align-items: start;
}

.hood-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.hood-btn {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 18px 20px;
  text-align: left;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  transition: border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.hood-btn:hover {
  border-color: var(--border-strong);
}

.hood-btn.active {
  background: var(--surface);
  border-color: var(--accent);
}

.hood-name {
  font-family: var(--font-display);
  font-size: 22px;
}

.hood-tag {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--ink-muted);
}

.hood-detail {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: clamp(24px, 4vw, 38px);
}

.hood-detail h3 {
  font-family: var(--font-display);
  font-size: 30px;
  font-weight: 400;
  margin: 0 0 12px;
}

.hood-specs {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}

.hood-specs span {
  display: block;
  font-size: 12px;
  color: var(--ink-muted);
  margin-bottom: 4px;
}

/* Estimator */
.est-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: clamp(28px, 4vw, 56px);
  align-items: start;
}

.field {
  margin-bottom: 20px;
}

.field-label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 8px;
}

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

.choice-btn {
  background: var(--bg);
  border: 1px solid var(--border-strong);
  border-radius: 4px;
  padding: 9px 15px;
  font-size: 13.5px;
  cursor: pointer;
  transition: all 0.2s var(--ease);
}

.choice-btn.active {
  background: var(--accent);
  color: #ffffff;
  border-color: var(--accent);
}

.input-control {
  width: 100%;
  padding: 11px 13px;
  background: var(--bg);
  border: 1px solid var(--border-strong);
  border-radius: 4px;
  font-size: 15px;
}

.input-control:focus {
  outline: 2px solid var(--accent-tint);
  border-color: var(--accent);
}

.quote-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: clamp(24px, 4vw, 36px);
}

.quote-amount {
  font-family: var(--font-display);
  font-size: clamp(36px, 4vw, 50px);
  line-height: 1.05;
  margin: 8px 0 6px;
}

.confirm-box {
  margin-top: 16px;
  padding: 14px 16px;
  border-radius: 4px;
  background: var(--accent-tint);
  border: 1px solid var(--accent);
  font-size: 14px;
  display: none;
}

.confirm-box.visible {
  display: block;
}

/* Footer */
.site-footer {
  padding: 48px 0 36px;
  background: var(--surface);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 28px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--border);
}

.footer-heading {
  font-size: 12px;
  font-weight: 600;
  color: var(--ink-muted);
  margin-bottom: 10px;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 20px;
  font-size: 13px;
  color: var(--ink-muted);
}

@media (max-width: 920px) {
  .nav-links,
  .phone-link {
    display: none;
  }
  .hero-grid,
  .service-layout,
  .lab-shell,
  .hood-grid,
  .est-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .preset-row {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .brand-city {
    display: none;
  }
}