/* Birchhub Analytics — Brass Mechanism theme */
:root {
  --color-gold: #c9a227;
  --color-gold-light: #dbb84a;
  --color-gold-dark: #a08040;
  --color-brass: #8b7355;
  --color-walnut: #3d2e1f;
  --color-walnut-deep: #2a2318;
  --color-steel: #5a5a5a;
  --color-steel-light: #7a7a7a;
  --color-oxidized: #4a6b5a;
  --color-ivory: #f5f0e6;
  --color-ivory-dark: #e8e0d0;
  --color-charcoal: #1a1814;
  --color-tobacco: #6b4c3b;
  --font-display: "EB Garamond", Georgia, serif;
  --font-body: "Source Sans 3", "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", "Courier New", monospace;
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2.5rem;
  --space-2xl: 4rem;
  --radius-sm: 2px;
  --radius-md: 4px;
  --shadow-brass: 0 2px 8px rgba(42, 35, 24, 0.25);
  --border-engraved: 1px solid var(--color-brass);
  --transition-gear: 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--color-charcoal);
  background: var(--color-ivory);
  background-image:
    radial-gradient(circle at 20% 80%, rgba(201, 162, 39, 0.04) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(74, 107, 90, 0.03) 0%, transparent 50%);
}

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

a {
  color: var(--color-tobacco);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

a:hover {
  color: var(--color-gold-dark);
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.25;
  color: var(--color-walnut-deep);
}

h1 { font-size: clamp(2rem, 5vw, 3.25rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.25rem); }
h3 { font-size: 1.35rem; }

p { margin: 0 0 var(--space-md); }

.container {
  width: min(1120px, 92vw);
  margin-inline: auto;
}

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

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md) 0;
  gap: var(--space-md);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  text-decoration: none;
  color: var(--color-ivory);
}

.logo-mark {
  width: 36px;
  height: 36px;
  border: 1px solid var(--color-gold);
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--color-gold);
}

.logo-text {
  font-family: var(--font-display);
  font-size: 1.25rem;
  letter-spacing: 0.02em;
}

.logo-sub {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.6rem;
  color: var(--color-brass);
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--color-gold);
  color: var(--color-gold);
  padding: var(--space-sm) var(--space-md);
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.main-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm) var(--space-lg);
}

.main-nav a {
  color: var(--color-ivory-dark);
  text-decoration: none;
  font-size: 0.9rem;
  letter-spacing: 0.03em;
  transition: color 0.2s;
}

.main-nav a:hover,
.main-nav a[aria-current="page"] {
  color: var(--color-gold);
}

@media (max-width: 768px) {
  .nav-toggle { display: block; }

  .main-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-walnut-deep);
    border-bottom: 2px solid var(--color-gold);
    padding: var(--space-md);
  }

  .main-nav.is-open { display: block; }

  .main-nav ul {
    flex-direction: column;
    gap: var(--space-md);
  }
}

/* Buttons — gear animation */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 0.75rem 1.5rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  text-decoration: none;
  border: 1px solid var(--color-gold);
  background: var(--color-walnut);
  color: var(--color-ivory);
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: background var(--transition-gear), transform var(--transition-gear);
}

.btn::before {
  content: "⚙";
  position: absolute;
  left: -1.5rem;
  opacity: 0;
  transition: left var(--transition-gear), opacity var(--transition-gear);
}

.btn:hover::before,
.btn:focus-visible::before {
  left: 0.5rem;
  opacity: 0.6;
}

.btn:hover,
.btn:focus-visible {
  background: var(--color-walnut-deep);
  padding-left: 2rem;
  outline: none;
}

.btn-primary {
  background: linear-gradient(180deg, var(--color-gold-light) 0%, var(--color-gold-dark) 100%);
  color: var(--color-walnut-deep);
  border-color: var(--color-gold-dark);
}

.btn-primary:hover {
  background: linear-gradient(180deg, var(--color-gold) 0%, var(--color-gold-dark) 100%);
}

.btn-outline {
  background: transparent;
  color: var(--color-walnut-deep);
  border-color: var(--color-brass);
}

/* Footer */
.site-footer {
  background: var(--color-walnut-deep);
  color: var(--color-ivory-dark);
  border-top: 3px solid var(--color-gold);
  padding: var(--space-2xl) 0 var(--space-xl);
  margin-top: var(--space-2xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-xl);
}

.footer-grid h3 {
  color: var(--color-gold);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.footer-grid a {
  color: var(--color-ivory-dark);
  text-decoration: none;
}

.footer-grid a:hover { color: var(--color-gold); }

.footer-grid ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-grid li { margin-bottom: var(--space-sm); }

.footer-bottom {
  margin-top: var(--space-xl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-brass);
  font-size: 0.875rem;
  color: var(--color-brass);
}

/* Hero variants */
.hero {
  padding: var(--space-2xl) 0;
  position: relative;
}

.hero-brass {
  background: linear-gradient(135deg, var(--color-walnut-deep) 0%, var(--color-walnut) 60%, var(--color-tobacco) 100%);
  color: var(--color-ivory);
  border-bottom: 4px solid var(--color-gold);
}

.hero-brass h1 { color: var(--color-ivory); }

.hero-brass .hero-lead { color: var(--color-ivory-dark); }

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xl);
  align-items: center;
}

@media (max-width: 768px) {
  .hero-grid { grid-template-columns: 1fr; }
}

.hero-lead {
  font-size: 1.15rem;
  max-width: 38ch;
}

.hero-meta {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-gold);
  margin-bottom: var(--space-md);
}

.hero-image-wrap {
  border: 2px solid var(--color-gold);
  padding: var(--space-sm);
  background: var(--color-walnut-deep);
  position: relative;
}

.hero-image-wrap::after {
  content: "";
  position: absolute;
  inset: 4px;
  border: 1px solid var(--color-brass);
  pointer-events: none;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  margin-top: var(--space-lg);
}

.hero-dial {
  position: absolute;
  top: -12px;
  right: 24px;
  width: 48px;
  height: 48px;
  border: 2px solid var(--color-gold);
  border-radius: 50%;
  background: var(--color-walnut-deep);
  font-family: var(--font-mono);
  font-size: 0.6rem;
  color: var(--color-gold);
  display: grid;
  place-items: center;
}

/* Sections */
.section {
  padding: var(--space-2xl) 0;
}

.section-alt {
  background: var(--color-ivory-dark);
  border-top: var(--border-engraved);
  border-bottom: var(--border-engraved);
}

.section-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-oxidized);
  margin-bottom: var(--space-sm);
}

/* Cards */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-lg);
}

.card {
  background: var(--color-ivory);
  border: var(--border-engraved);
  box-shadow: var(--shadow-brass);
  transition: transform 0.3s ease;
}

.card:hover {
  transform: translateY(-2px);
}

.card-image {
  aspect-ratio: 16/10;
  object-fit: cover;
  width: 100%;
  border-bottom: var(--border-engraved);
}

.card-body {
  padding: var(--space-lg);
}

.card-meta {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--color-steel);
  margin-bottom: var(--space-sm);
}

.card h3 {
  margin-top: 0;
  font-size: 1.2rem;
}

/* Instrument panel styling */
.instrument-panel {
  background: var(--color-walnut-deep);
  color: var(--color-ivory);
  padding: var(--space-lg);
  border: 2px solid var(--color-gold);
  position: relative;
}

.instrument-panel::before {
  content: attr(data-reading);
  position: absolute;
  top: var(--space-sm);
  right: var(--space-md);
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--color-gold);
  letter-spacing: 0.1em;
}

.stat-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xl);
  margin-top: var(--space-lg);
}

.stat-item {
  font-family: var(--font-mono);
}

.stat-value {
  font-size: 1.75rem;
  color: var(--color-gold);
  display: block;
}

.stat-label {
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-brass);
}

/* Testimonials */
.testimonial {
  border-left: 3px solid var(--color-gold);
  padding-left: var(--space-lg);
  margin-bottom: var(--space-xl);
}

.testimonial cite {
  display: block;
  margin-top: var(--space-md);
  font-style: normal;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--color-steel);
}

/* Forms */
.form-group {
  margin-bottom: var(--space-lg);
}

.form-group label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: var(--space-sm);
  color: var(--color-walnut);
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.75rem;
  border: var(--border-engraved);
  background: var(--color-ivory);
  font-family: var(--font-body);
  font-size: 1rem;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: 2px solid var(--color-gold);
  outline-offset: 2px;
}

.form-group input.is-invalid,
.form-group select.is-invalid,
.form-group textarea.is-invalid {
  border-color: #8b3a3a;
}

.field-error {
  color: #8b3a3a;
  font-size: 0.875rem;
  margin-top: var(--space-xs);
}

.form-status {
  padding: var(--space-md);
  margin-top: var(--space-md);
  display: none;
}

.form-status.is-visible { display: block; }

.form-status.success {
  background: rgba(74, 107, 90, 0.15);
  border: 1px solid var(--color-oxidized);
  color: var(--color-walnut);
}

.form-status.error {
  background: rgba(139, 58, 58, 0.1);
  border: 1px solid #8b3a3a;
  color: #5a2020;
}

/* Cookie banner */
.cookie-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: var(--color-walnut-deep);
  border-top: 2px solid var(--color-gold);
  padding: var(--space-lg);
  z-index: 200;
  transform: translateY(100%);
  transition: transform 0.4s ease;
}

.cookie-banner.is-visible {
  transform: translateY(0);
}

.cookie-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  max-width: 1120px;
  margin: 0 auto;
}

.cookie-banner p {
  color: var(--color-ivory-dark);
  margin: 0;
  flex: 1;
  min-width: 200px;
  font-size: 0.9rem;
}

.cookie-actions {
  display: flex;
  gap: var(--space-sm);
}

.cookie-actions .btn {
  padding: 0.5rem 1rem;
  font-size: 0.7rem;
}

/* Page headers */
.page-header {
  padding: var(--space-xl) 0;
  border-bottom: var(--border-engraved);
  margin-bottom: var(--space-xl);
}

.page-header h1 { margin: 0 0 var(--space-sm); }

/* Legal prose */
.legal-content h2 {
  font-size: 1.35rem;
  margin-top: var(--space-xl);
}

.legal-content h3 {
  font-size: 1.1rem;
  margin-top: var(--space-lg);
}

.cookies-table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-lg) 0;
  font-size: 0.9rem;
}

.cookies-table th,
.cookies-table td {
  border: var(--border-engraved);
  padding: var(--space-sm) var(--space-md);
  text-align: left;
}

.cookies-table th {
  background: var(--color-ivory-dark);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
}

/* Pricing table */
.pricing-block {
  border: var(--border-engraved);
  padding: var(--space-lg);
  margin-bottom: var(--space-lg);
  background: var(--color-ivory);
}

.pricing-block h3 {
  margin-top: 0;
  border-bottom: 1px solid var(--color-brass);
  padding-bottom: var(--space-sm);
}

.price-tag {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  color: var(--color-gold-dark);
  margin: var(--space-md) 0;
}

/* Service detail */
.service-detail-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--space-xl);
}

@media (max-width: 768px) {
  .service-detail-grid { grid-template-columns: 1fr; }
}

.service-sidebar {
  background: var(--color-ivory-dark);
  border: var(--border-engraved);
  padding: var(--space-lg);
}

.service-sidebar dt {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-steel);
  margin-top: var(--space-md);
}

.service-sidebar dd {
  margin: var(--space-xs) 0 0;
}

.check-list {
  list-style: none;
  padding: 0;
}

.check-list li {
  padding-left: 1.5rem;
  position: relative;
  margin-bottom: var(--space-sm);
}

.check-list li::before {
  content: "◆";
  position: absolute;
  left: 0;
  color: var(--color-gold);
  font-size: 0.6rem;
  top: 0.35rem;
}

/* Blog */
.post-meta {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--color-steel);
  margin-bottom: var(--space-lg);
}

.post-body p {
  margin-bottom: var(--space-lg);
}

/* 404 */
.error-page {
  text-align: center;
  padding: var(--space-2xl) 0;
}

.error-code {
  font-family: var(--font-mono);
  font-size: 5rem;
  color: var(--color-gold);
  line-height: 1;
}

/* Sample gallery */
.sample-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--space-lg);
}

.sample-card {
  position: relative;
  overflow: hidden;
}

.sample-card .category-tag {
  position: absolute;
  top: var(--space-md);
  left: var(--space-md);
  background: var(--color-walnut-deep);
  color: var(--color-gold);
  font-family: var(--font-mono);
  font-size: 0.65rem;
  padding: 0.25rem 0.5rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

/* Team */
.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: var(--space-lg);
}

.team-member {
  text-align: center;
}

.team-member img {
  width: 160px;
  height: 160px;
  object-fit: cover;
  border-radius: 50%;
  border: 3px solid var(--color-gold);
  margin: 0 auto var(--space-md);
}

.team-member h3 { margin-bottom: var(--space-xs); }

.team-role {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-oxidized);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* Case study */
.case-study {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--space-xl);
  margin-bottom: var(--space-2xl);
  padding-bottom: var(--space-2xl);
  border-bottom: var(--border-engraved);
}

@media (max-width: 768px) {
  .case-study { grid-template-columns: 1fr; }
}

.case-study:last-child {
  border-bottom: none;
}