:root {
  --bg-canvas: #1e1612;
  --bg-surface: #30231c;
  --bg-surface-hover: #3d2d24;
  --text-primary: #f5ecdf;
  --text-muted: #c8b8a6;
  --accent-primary: #f59e0b;
  --accent-secondary: #d97706;
  --border-subtle: rgba(245, 236, 223, 0.25);
  --border-strong: #f5ecdf;
  --ease-kinetic: cubic-bezier(0.16, 1, 0.3, 1);
}

*, *::before, *::after {
  box-sizing: border-box;
  border-radius: 0 !important;
}

html, body {
  margin: 0;
  padding: 0;
  background-color: var(--bg-canvas);
  color: var(--text-primary);
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  line-height: 1.65;
  font-size: 16px;
  overflow-wrap: anywhere;
  hyphens: auto;
}

h1, h2, h3, h4, .nav-link, .brand-logo, .btn, .label-tag, th {
  font-family: "Arial Narrow", "Helvetica Neue", Arial, sans-serif;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-weight: 700;
  line-height: 1.25;
}

h1 {
  font-size: clamp(1.75rem, 3.5vw, 2.6rem);
  margin: 0 0 1rem 0;
  color: var(--text-primary);
}

h2 {
  font-size: clamp(1.35rem, 2.5vw, 1.85rem);
  margin: 3rem 0 1.25rem 0;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-subtle);
  color: var(--text-primary);
}

h3 {
  font-size: 1.15rem;
  margin: 1.75rem 0 0.75rem 0;
  color: var(--accent-primary);
}

p, ul, ol {
  margin: 0 0 1.25rem 0;
}

a {
  color: var(--accent-primary);
  text-decoration: underline;
  text-underline-offset: 4px;
}

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

:focus-visible {
  outline: 2px solid var(--accent-primary);
  outline-offset: 3px;
}

/* Header & Navigation */
.site-header {
  position: relative;
  background-color: var(--bg-surface);
  border-bottom: 1px solid var(--border-subtle);
  padding: 1rem 1.5rem 0.75rem;
}

.header-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
}

.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  text-decoration: none;
  color: var(--text-primary);
  font-size: 1.15rem;
  letter-spacing: 0.18em;
}

.brand-mark {
  width: 24px;
  height: 24px;
  background-color: var(--accent-primary);
  display: inline-block;
  border: 2px solid var(--text-primary);
}

.menu-toggle {
  display: none;
  background: var(--bg-canvas);
  color: var(--text-primary);
  border: 1px solid var(--border-subtle);
  padding: 0.4rem 0.75rem;
  font-size: 1.25rem;
  cursor: pointer;
}

.nav-row {
  max-width: 1200px;
  margin: 0.75rem auto 0;
  padding-top: 0.65rem;
  border-top: 1px solid var(--border-subtle);
  display: flex;
  justify-content: center;
  gap: 2rem;
  flex-wrap: nowrap;
}

.nav-link {
  text-decoration: none;
  color: var(--text-primary);
  font-size: 0.9rem;
  padding: 0.25rem 0.5rem;
  border: 1px solid transparent;
}

.nav-link:hover, .nav-link[aria-current="page"] {
  color: var(--accent-primary);
  border-color: var(--accent-primary);
  background-color: var(--bg-canvas);
}

/* Layout Containers */
.main-wrapper {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem 4rem;
}

.hero-band {
  max-width: 70ch;
  margin: 2rem auto 1.5rem;
  padding: 1.5rem;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
}

.hero-subtitle {
  color: var(--text-muted);
  font-size: 1.05rem;
  margin-bottom: 1.25rem;
}

.reading-col {
  max-width: 70ch;
  margin: 0 auto;
}

.wide-outset {
  max-width: 960px;
  margin: 2.25rem auto;
}

/* Buttons */
.btn {
  display: inline-block;
  background-color: var(--accent-primary);
  color: var(--bg-canvas);
  text-decoration: none;
  padding: 0.75rem 1.35rem;
  font-size: 0.9rem;
  border: 1px solid var(--text-primary);
  box-shadow: 4px 4px 0 var(--text-primary);
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.btn:hover {
  color: var(--bg-canvas);
  background-color: var(--text-primary);
  transform: translate(4px, 4px);
  box-shadow: 0 0 0 var(--text-primary);
}

.btn-secondary {
  background-color: var(--bg-surface);
  color: var(--text-primary);
  box-shadow: 4px 4px 0 var(--accent-primary);
}

.btn-secondary:hover {
  background-color: var(--accent-primary);
  color: var(--bg-canvas);
  box-shadow: 0 0 0 var(--accent-primary);
}

/* Pull Quotes & Callouts */
.pull-quote {
  margin: 2rem -1.5rem;
  padding: 1.25rem 1.5rem;
  background-color: var(--bg-surface);
  border-left: 4px solid var(--accent-primary);
  border-top: 1px solid var(--border-subtle);
  border-right: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
  font-size: 1.05rem;
  color: var(--text-primary);
}

.pull-quote strong {
  color: var(--accent-primary);
  display: block;
  font-family: "Arial Narrow", sans-serif;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 0.35rem;
}

/* Cards & Grids */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  margin: 1.75rem 0;
}

.card {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.card-alt {
  background-color: var(--bg-canvas);
  border: 1px solid var(--border-strong);
}

.label-tag {
  display: inline-block;
  font-size: 0.75rem;
  color: var(--bg-canvas);
  background-color: var(--accent-primary);
  padding: 0.15rem 0.5rem;
  margin-bottom: 0.75rem;
  width: fit-content;
}

/* SVG Diagrams & Visuals */
.diagram-frame {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  padding: 1.25rem;
  margin: 1.75rem 0;
}

.diagram-frame svg {
  width: 100%;
  height: auto;
  display: block;
  background-color: var(--bg-canvas);
  border: 1px solid var(--border-subtle);
}

.diagram-caption {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-top: 0.75rem;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
}

/* Tables & Comparison Rows */
.table-wrap {
  overflow-x: auto;
  margin: 1.75rem 0;
  border: 1px solid var(--border-subtle);
}

table {
  width: 100%;
  border-collapse: collapse;
  background-color: var(--bg-surface);
  font-size: 0.92rem;
}

th, td {
  padding: 0.85rem 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border-subtle);
  border-right: 1px solid var(--border-subtle);
}

th {
  background-color: var(--bg-canvas);
  color: var(--accent-primary);
}

/* Curtain Measurement Strips */
.strip-row {
  display: grid;
  grid-template-columns: 180px 1fr 120px;
  gap: 1rem;
  align-items: center;
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  padding: 1rem;
  margin-bottom: 0.75rem;
}

.strip-bar-bg {
  background-color: var(--bg-canvas);
  height: 20px;
  border: 1px solid var(--border-subtle);
  position: relative;
}

.strip-bar-fill {
  background-color: var(--accent-primary);
  height: 100%;
}

/* FAQ Disclosures */
details.faq-item {
  background-color: var(--bg-surface);
  border: 1px solid var(--border-subtle);
  margin-bottom: 0.85rem;
}

details.faq-item summary {
  padding: 1rem 1.25rem;
  cursor: pointer;
  font-family: "Arial Narrow", sans-serif;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-weight: 700;
  color: var(--text-primary);
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

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

details.faq-item summary::after {
  content: "+";
  color: var(--accent-primary);
  font-size: 1.25rem;
}

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

details.faq-item[open] summary {
  border-bottom: 1px solid var(--border-subtle);
}

.faq-body {
  padding: 1.25rem;
  color: var(--text-primary);
}

/* Forms */
.form-group {
  margin-bottom: 1.25rem;
}

label {
  display: block;
  font-family: "Arial Narrow", sans-serif;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.4rem;
  font-size: 0.9rem;
}

input, select, textarea {
  width: 100%;
  padding: 0.75rem;
  background-color: var(--bg-canvas);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 1rem;
}

input:focus, select:focus, textarea:focus {
  border-color: var(--accent-primary);
  outline: none;
}

.composer-output {
  background-color: var(--bg-canvas);
  border: 1px solid var(--accent-primary);
  padding: 1.25rem;
  white-space: pre-wrap;
  font-family: monospace;
  font-size: 0.9rem;
  margin: 1rem 0;
}

/* Reveal Animation */
.reveal {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.5s var(--ease-kinetic), transform 0.5s var(--ease-kinetic);
}

.reveal-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Footer */
.site-footer {
  background-color: var(--bg-surface);
  border-top: 1px solid var(--border-subtle);
  padding: 3rem 1.5rem;
  margin-top: 4rem;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 2rem;
}

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

.footer-links li {
  margin-bottom: 0.5rem;
}

/* Responsive Breakpoints */
@media (max-width: 768px) {
  .menu-toggle {
    display: inline-block;
  }
  .nav-row {
    display: none;
    flex-direction: column;
    gap: 0.5rem;
    padding-bottom: 0.5rem;
  }
  .nav-row.nav-open {
    display: flex;
  }
  .pull-quote {
    margin: 1.5rem 0;
  }
  .strip-row {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: reduce){*,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}