/* ==========================================================================
   CustomAddressSigns.com — Light Architectural Foundry & Stone Carving Atelier
   Scoped Token Prefix: --cas-*
   WCAG 2.1 AA/AAA High-Contrast Light Atelier Palette:
   - #0f172a on #f8fafc = 16.5:1 (AAA)
   - #1e293b on #ffffff = 14.1:1 (AAA)
   - #334155 on #ffffff =  9.7:1 (AAA)
   - #475569 on #f8fafc =  7.0:1 (AAA)
   - #ffffff on #0f766e =  5.47:1 (AA+ Primary CTA)
   ========================================================================== */

:root {
  --cas-bg-canvas: #f8fafc;
  --cas-bg-card: #ffffff;
  --cas-bg-panel: #f1f5f9;
  --cas-bg-tint: #ecfdf5;
  --cas-border: #cbd5e1;
  --cas-border-strong: #94a3b8;
  --cas-text-primary: #0f172a;
  --cas-text-body: #1e293b;
  --cas-text-secondary: #334155;
  --cas-text-muted: #475569;
  --cas-accent-teal: #0f766e;
  --cas-accent-teal-hover: #115e59;
  --cas-accent-teal-text: #ffffff;
  --cas-accent-bronze: #9a3412;
  --cas-accent-gold: #b45309;
  --cas-font-serif: 'Fraunces', 'Playfair Display', Georgia, 'Times New Roman', serif;
  --cas-font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --cas-font-mono: 'JetBrains Mono', 'SFMono-Regular', Consolas, monospace;
  --cas-radius-sm: 8px;
  --cas-radius-md: 12px;
  --cas-radius-lg: 16px;
  --cas-shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.05);
  --cas-shadow-md: 0 10px 28px rgba(15, 23, 42, 0.08);
}

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

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body.cas-theme-body {
  margin: 0;
  padding: 0;
  background-color: var(--cas-bg-canvas);
  color: var(--cas-text-body);
  font-family: var(--cas-font-sans);
  font-size: 16px;
  line-height: 1.65;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

.cas-skip-link {
  position: absolute;
  top: -100px;
  left: 16px;
  z-index: 2000;
  background: var(--cas-accent-teal);
  color: var(--cas-accent-teal-text);
  padding: 10px 16px;
  border-radius: var(--cas-radius-sm);
  font-weight: 700;
  text-decoration: none;
}

.cas-skip-link:focus {
  top: 12px;
}

.cas-sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.cas-container {
  width: 100%;
  max-width: 1220px;
  margin: 0 auto;
  padding: 0 20px;
}

.cas-page h1,
.cas-page h2,
.cas-page h3,
.cas-page h4 {
  color: var(--cas-text-primary);
  font-family: var(--cas-font-serif);
  line-height: 1.22;
  margin-top: 0;
}

.cas-page a {
  color: var(--cas-accent-teal);
  text-underline-offset: 3px;
}

.cas-page a:hover {
  color: var(--cas-accent-teal-hover);
}

.cas-kicker {
  display: inline-block;
  font-family: var(--cas-font-mono);
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--cas-accent-bronze);
  background: #ffedd5;
  border: 1px solid #fdba74;
  padding: 4px 10px;
  border-radius: 999px;
  margin-bottom: 12px;
}

.cas-mono-tag {
  display: inline-block;
  font-family: var(--cas-font-mono);
  font-size: 0.74rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--cas-text-muted);
}

.cas-icon-teal {
  color: var(--cas-accent-teal);
  flex-shrink: 0;
}

.cas-icon-bronze {
  color: var(--cas-accent-bronze);
  flex-shrink: 0;
}

/* Buttons */
.cas-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 10px 20px;
  border-radius: var(--cas-radius-sm);
  font-family: var(--cas-font-sans);
  font-size: 0.94rem;
  font-weight: 700;
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background-color 0.16s ease, border-color 0.16s ease, color 0.16s ease;
}

.cas-btn-primary,
a.cas-btn-primary {
  background: var(--cas-accent-teal);
  color: var(--cas-accent-teal-text);
  border-color: var(--cas-accent-teal);
}

.cas-btn-primary:hover,
a.cas-btn-primary:hover {
  background: var(--cas-accent-teal-hover);
  color: var(--cas-accent-teal-text);
}

.cas-btn-secondary,
a.cas-btn-secondary {
  background: var(--cas-bg-card);
  color: var(--cas-text-primary);
  border-color: var(--cas-border-strong);
}

.cas-btn-secondary:hover,
a.cas-btn-secondary:hover {
  border-color: var(--cas-accent-teal);
  color: var(--cas-accent-teal);
}

/* Header & Topbar */
.cas-site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--cas-border);
}

.cas-spec-topbar {
  background: #0f172a;
  color: #e2e8f0;
  font-family: var(--cas-font-mono);
  font-size: 0.74rem;
  padding: 7px 0;
}

.cas-spec-topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

.cas-topbar-pill {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: #f8fafc;
  font-weight: 600;
}

.cas-topbar-icon {
  color: #fbbf24;
  flex-shrink: 0;
}

.cas-topbar-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.cas-topbar-mail,
.cas-spec-topbar a.cas-topbar-mail {
  color: #5eead4;
  font-weight: 700;
  text-decoration: none;
}

.cas-navbar-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 74px;
  gap: 16px;
}

.cas-brand-link {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.cas-brand-logo {
  border-radius: 10px;
  flex-shrink: 0;
}

.cas-brand-copy {
  display: flex;
  flex-direction: column;
}

.cas-brand-title {
  font-family: var(--cas-font-serif);
  font-size: 1.24rem;
  font-weight: 700;
  color: var(--cas-text-primary);
}

.cas-brand-subtitle {
  font-family: var(--cas-font-mono);
  font-size: 0.7rem;
  color: var(--cas-text-muted);
}

.cas-nav-list {
  display: flex;
  align-items: center;
  gap: 6px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.cas-nav-link,
.cas-page a.cas-nav-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 12px;
  color: var(--cas-text-secondary);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 600;
  border-radius: var(--cas-radius-sm);
}

.cas-nav-link:hover,
.cas-nav-link.active,
.cas-page a.cas-nav-link.active {
  color: var(--cas-accent-teal);
  background: #f0fdfa;
}

.cas-nav-cta,
.cas-page a.cas-nav-cta {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 16px;
  margin-left: 6px;
  background: var(--cas-accent-teal);
  color: var(--cas-accent-teal-text);
  font-weight: 700;
  font-size: 0.9rem;
  border-radius: var(--cas-radius-sm);
  text-decoration: none;
}

.cas-nav-cta:hover,
.cas-page a.cas-nav-cta:hover {
  background: var(--cas-accent-teal-hover);
  color: var(--cas-accent-teal-text);
}

.cas-mobile-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: var(--cas-bg-panel);
  color: var(--cas-text-primary);
  border: 1px solid var(--cas-border-strong);
  border-radius: var(--cas-radius-sm);
  cursor: pointer;
}

.cas-nav-backdrop {
  display: none;
}

/* Hero & Drafting Studio */
.cas-hero {
  padding: 52px 0 48px;
  border-bottom: 1px solid var(--cas-border);
  background-color: var(--cas-bg-canvas);
  background-image:
    linear-gradient(to right, rgba(148, 163, 184, 0.14) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(148, 163, 184, 0.14) 1px, transparent 1px);
  background-size: 28px 28px;
}

.cas-hero-grid {
  display: grid;
  grid-template-columns: 1.02fr 0.98fr;
  gap: 36px;
  align-items: start;
}

.cas-hero-title {
  font-size: clamp(2rem, 3.7vw, 3rem);
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.cas-hero-lead {
  font-size: 1.08rem;
  color: var(--cas-text-secondary);
  margin-bottom: 24px;
}

.cas-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 28px;
}

.cas-metric-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.cas-metric-card {
  background: var(--cas-bg-card);
  border: 1px solid var(--cas-border);
  border-radius: var(--cas-radius-md);
  padding: 14px;
  box-shadow: var(--cas-shadow-sm);
}

.cas-metric-val {
  display: block;
  font-family: var(--cas-font-serif);
  font-size: 1.18rem;
  font-weight: 700;
  color: var(--cas-text-primary);
}

.cas-metric-lbl {
  display: block;
  font-size: 0.8rem;
  color: var(--cas-text-muted);
}

/* Widget 1: Plaque Composer Studio Card */
.cas-studio-card,
.cas-console-card {
  background: var(--cas-bg-card);
  border: 1px solid var(--cas-border);
  border-radius: var(--cas-radius-lg);
  padding: 22px;
  box-shadow: var(--cas-shadow-md);
}

.cas-spec-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 12px;
}

.cas-composer-stage {
  background: #e2e8f0;
  border: 1px solid var(--cas-border-strong);
  border-radius: var(--cas-radius-md);
  padding: 28px 18px;
  min-height: 214px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
}

.cas-plaque-preview {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 22px 28px;
  min-width: 240px;
  max-width: 100%;
  transition: all 0.2s ease;
  border: 4px solid #b45309;
  background: #292524;
  color: #fef3c7;
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.22);
}

/* Silhouette Variations */
.cas-plaque-preview[data-silhouette="arch"] {
  border-radius: 90px 90px 10px 10px;
  padding-top: 28px;
}

.cas-plaque-preview[data-silhouette="horizontal"] {
  border-radius: 8px;
  min-width: 268px;
}

.cas-plaque-preview[data-silhouette="vertical"] {
  border-radius: 10px;
  min-width: 132px;
  padding: 24px 18px;
}

.cas-plaque-preview[data-silhouette="oval"] {
  border-radius: 999px;
  padding: 26px 38px;
}

/* Material Variations */
.cas-plaque-preview[data-material="bronze"] {
  background: #292524;
  border-color: #d97706;
  color: #fef3c7;
}

.cas-plaque-preview[data-material="slate"] {
  background: #334155;
  border-color: #94a3b8;
  color: #f8fafc;
}

.cas-plaque-preview[data-material="aluminum"] {
  background: #0f172a;
  border-color: #cbd5e1;
  color: #f8fafc;
}

.cas-plaque-preview[data-material="enamel"] {
  background: #ffffff;
  border-color: #0f766e;
  color: #0f172a;
}

/* Font Variations */
.cas-plaque-preview[data-font="serif"] .cas-plaque-line1 {
  font-family: var(--cas-font-serif);
}

.cas-plaque-preview[data-font="sans"] .cas-plaque-line1 {
  font-family: var(--cas-font-sans);
}

.cas-plaque-preview[data-font="mono"] .cas-plaque-line1 {
  font-family: var(--cas-font-mono);
}

.cas-plaque-line1 {
  font-size: 2.55rem;
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: 0.08em;
}

.cas-plaque-rule {
  width: 72%;
  height: 2px;
  background: currentColor;
  opacity: 0.45;
  margin: 8px 0;
}

.cas-plaque-line2 {
  font-family: var(--cas-font-sans);
  font-size: 0.84rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.cas-plaque-preview[data-silhouette="vertical"] .cas-plaque-line2 {
  font-size: 0.68rem;
  letter-spacing: 0.1em;
}

.cas-stage-telemetry {
  margin-top: 12px;
  font-family: var(--cas-font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--cas-text-primary);
}

/* Forms & Inputs */
.cas-form-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-bottom: 12px;
}

.cas-field {
  display: flex;
  flex-direction: column;
  gap: 5px;
  margin-bottom: 10px;
}

.cas-field label {
  font-family: var(--cas-font-mono);
  font-size: 0.74rem;
  font-weight: 700;
  color: var(--cas-text-secondary);
}

.cas-input,
.cas-select {
  width: 100%;
  min-height: 42px;
  padding: 8px 12px;
  background: var(--cas-bg-panel);
  color: var(--cas-text-primary);
  border: 1px solid var(--cas-border-strong);
  border-radius: var(--cas-radius-sm);
  font-family: var(--cas-font-sans);
  font-size: 0.92rem;
}

.cas-input:focus,
.cas-select:focus {
  outline: 2px solid var(--cas-accent-teal);
  outline-offset: 1px;
  background: var(--cas-bg-card);
}

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

.cas-studio-readout {
  background: var(--cas-bg-panel);
  border-left: 4px solid var(--cas-accent-teal);
  padding: 10px 14px;
  border-radius: 0 var(--cas-radius-sm) var(--cas-radius-sm) 0;
  font-size: 0.88rem;
  color: var(--cas-text-secondary);
}

/* Sections */
.cas-section {
  padding: 56px 0;
}

.cas-section-alt {
  background: var(--cas-bg-panel);
  border-top: 1px solid var(--cas-border);
  border-bottom: 1px solid var(--cas-border);
}

.cas-section-head {
  max-width: 780px;
  margin-bottom: 28px;
}

.cas-section-title {
  font-size: clamp(1.65rem, 2.8vw, 2.25rem);
  margin-bottom: 10px;
}

.cas-section-sub {
  color: var(--cas-text-secondary);
  margin: 0;
}

/* Page Heroes */
.cas-page-hero,
.cas-article-banner {
  padding: 44px 0 36px;
  background: var(--cas-bg-panel);
  border-bottom: 1px solid var(--cas-border);
}

.cas-page-title,
.cas-article-title {
  font-size: clamp(1.85rem, 3.2vw, 2.65rem);
  margin-bottom: 12px;
}

.cas-page-lead {
  max-width: 820px;
  font-size: 1.05rem;
  color: var(--cas-text-secondary);
  margin: 0;
}

/* Widget 2: Tablist */
.cas-tabs-shell {
  background: var(--cas-bg-card);
  border: 1px solid var(--cas-border);
  border-radius: var(--cas-radius-lg);
  overflow: hidden;
  box-shadow: var(--cas-shadow-sm);
}

.cas-tablist {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  background: var(--cas-bg-panel);
  border-bottom: 1px solid var(--cas-border);
}

.cas-tab-btn {
  min-height: 52px;
  padding: 12px 14px;
  background: transparent;
  color: var(--cas-text-secondary);
  border: none;
  border-right: 1px solid var(--cas-border);
  border-bottom: 3px solid transparent;
  font-family: var(--cas-font-sans);
  font-size: 0.9rem;
  font-weight: 700;
  cursor: pointer;
  text-align: left;
}

.cas-tab-btn:last-child {
  border-right: none;
}

.cas-tab-btn[aria-selected="true"] {
  background: var(--cas-bg-card);
  color: var(--cas-accent-teal);
  border-bottom-color: var(--cas-accent-teal);
}

.cas-tabpanel {
  padding: 28px;
}

.cas-tabpanel-grid {
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 28px;
  align-items: center;
}

.cas-spec-kv {
  background: var(--cas-bg-panel);
  border: 1px solid var(--cas-border);
  border-radius: var(--cas-radius-md);
  padding: 16px;
  display: grid;
  gap: 10px;
}

.cas-spec-kv-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 8px;
  border-bottom: 1px dashed var(--cas-border);
  font-size: 0.88rem;
}

.cas-spec-kv-row:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

/* Widget 3 & 4 Dual Consoles */
.cas-calc-dual-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
  align-items: start;
}

.cas-climate-btn-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
  margin-bottom: 16px;
}

.cas-climate-btn {
  min-height: 42px;
  padding: 8px 12px;
  background: var(--cas-bg-panel);
  color: var(--cas-text-primary);
  border: 1px solid var(--cas-border-strong);
  border-radius: var(--cas-radius-sm);
  font-family: var(--cas-font-sans);
  font-size: 0.86rem;
  font-weight: 700;
  cursor: pointer;
  text-align: left;
}

.cas-climate-btn.is-active,
.cas-climate-btn[aria-pressed="true"] {
  background: var(--cas-accent-teal);
  color: var(--cas-accent-teal-text);
  border-color: var(--cas-accent-teal);
}

.cas-output-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
  margin: 14px 0;
}

.cas-output-box {
  background: var(--cas-bg-panel);
  border: 1px solid var(--cas-border);
  border-radius: var(--cas-radius-sm);
  padding: 12px;
}

.cas-output-label {
  display: block;
  font-size: 0.76rem;
  color: var(--cas-text-muted);
  margin-bottom: 3px;
}

.cas-output-val {
  display: block;
  font-family: var(--cas-font-mono);
  font-size: 0.94rem;
  font-weight: 700;
  color: var(--cas-text-primary);
}

.cas-spec-pre {
  background: #0f172a;
  color: #f8fafc;
  padding: 14px;
  border-radius: var(--cas-radius-sm);
  font-family: var(--cas-font-mono);
  font-size: 0.8rem;
  white-space: pre-wrap;
  word-break: break-word;
  margin: 12px 0;
}

/* Cards, Sidebar & Content Grids */
.cas-content-with-sidebar {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 32px;
  align-items: start;
}

.cas-cards-grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.cas-card {
  background: var(--cas-bg-card);
  border: 1px solid var(--cas-border);
  border-radius: var(--cas-radius-md);
  padding: 20px;
  box-shadow: var(--cas-shadow-sm);
}

.cas-card-img {
  width: 100%;
  height: auto;
  border-radius: var(--cas-radius-sm);
  border: 1px solid var(--cas-border);
  margin-bottom: 12px;
  background: var(--cas-bg-panel);
}

.cas-card-title {
  font-size: 1.18rem;
  margin: 8px 0 10px;
}

.cas-card-title a {
  color: var(--cas-text-primary);
  text-decoration: none;
}

.cas-card-title a:hover {
  color: var(--cas-accent-teal);
}

.cas-check-bullets {
  padding-left: 20px;
  margin: 10px 0 0;
}

.cas-check-bullets li {
  margin-bottom: 6px;
}

/* Filter Bar */
.cas-filter-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 16px;
  margin-bottom: 22px;
  background: var(--cas-bg-card);
  border: 1px solid var(--cas-border);
  border-radius: var(--cas-radius-md);
}

.cas-search-box {
  flex: 1 1 260px;
}

.cas-chip-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.cas-chip {
  min-height: 38px;
  padding: 6px 14px;
  background: var(--cas-bg-panel);
  color: var(--cas-text-secondary);
  border: 1px solid var(--cas-border-strong);
  border-radius: 999px;
  font-family: var(--cas-font-sans);
  font-size: 0.84rem;
  font-weight: 600;
  cursor: pointer;
}

.cas-chip.is-active {
  background: var(--cas-accent-teal);
  color: var(--cas-accent-teal-text);
  border-color: var(--cas-accent-teal);
  font-weight: 700;
}

/* Article Prose & Tables */
.cas-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 0.86rem;
  color: var(--cas-text-muted);
  margin-bottom: 12px;
}

.cas-article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  font-size: 0.88rem;
  color: var(--cas-text-muted);
}

.cas-article-main {
  background: var(--cas-bg-card);
  border: 1px solid var(--cas-border);
  border-radius: var(--cas-radius-lg);
  padding: 32px;
  box-shadow: var(--cas-shadow-sm);
}

.cas-article-figure {
  margin: 22px 0;
}

.cas-article-figure img,
.cas-article-hero-img {
  width: 100%;
  height: auto;
  border-radius: var(--cas-radius-md);
  border: 1px solid var(--cas-border);
}

.cas-article-figure figcaption {
  font-size: 0.84rem;
  color: var(--cas-text-muted);
  margin-top: 8px;
}

.cas-toc-box {
  background: var(--cas-bg-panel);
  border: 1px solid var(--cas-border);
  border-radius: var(--cas-radius-md);
  padding: 18px 22px;
  margin-bottom: 24px;
}

.cas-toc-list {
  margin: 10px 0 0;
  padding-left: 20px;
}

.cas-toc-item {
  margin-bottom: 6px;
}

.cas-toc-sub {
  margin-left: 16px;
}

.cas-prose h2 {
  font-size: 1.52rem;
  margin-top: 30px;
  margin-bottom: 12px;
}

.cas-prose h3 {
  font-size: 1.2rem;
  margin-top: 22px;
  margin-bottom: 8px;
}

.table-responsive {
  width: 100%;
  overflow-x: auto;
  margin: 20px 0;
  border: 1px solid var(--cas-border);
  border-radius: var(--cas-radius-sm);
}

.cas-prose table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
}

.cas-prose th,
.cas-prose td {
  padding: 11px 14px;
  text-align: left;
  border-bottom: 1px solid var(--cas-border);
}

.cas-prose th {
  background: var(--cas-bg-panel);
  color: var(--cas-text-primary);
  font-weight: 700;
}

.cas-article-endbox {
  margin-top: 32px;
  background: #f0fdfa;
  border: 1px solid #99f6e4;
  border-radius: var(--cas-radius-md);
  padding: 24px;
}

.cas-inline-cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 14px;
}

/* Sidebar & Shared Contact Form Overrides */
.cas-sidebar {
  display: grid;
  gap: 20px;
}

.cas-sidebar-card,
.cas-contact-form-panel {
  background: var(--cas-bg-card);
  border: 1px solid var(--cas-border);
  border-radius: var(--cas-radius-md);
  padding: 20px;
  box-shadow: var(--cas-shadow-sm);
}

.cas-contact-form-panel {
  margin: 22px 0;
}

.cas-contact-cards-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.cas-sidebar-list {
  list-style: none;
  padding: 0;
  margin: 10px 0 0;
  display: grid;
  gap: 8px;
}

.cas-shared-contact-form input,
.cas-shared-contact-form textarea,
.cas-shared-contact-form select,
.cas-sidebar-form input,
.cas-sidebar-form textarea,
.cas-sidebar-form select {
  width: 100%;
  padding: 10px 12px;
  margin-bottom: 10px;
  background: var(--cas-bg-panel);
  color: var(--cas-text-primary);
  border: 1px solid var(--cas-border-strong);
  border-radius: var(--cas-radius-sm);
  font-family: var(--cas-font-sans);
}

.cas-shared-contact-form button[type="submit"],
.cas-sidebar-form button[type="submit"] {
  min-height: 44px;
  padding: 10px 20px;
  background: var(--cas-accent-teal);
  color: var(--cas-accent-teal-text);
  border: none;
  border-radius: var(--cas-radius-sm);
  font-weight: 700;
  cursor: pointer;
}

/* Footer */
.cas-footer {
  background: #0f172a;
  color: #cbd5e1;
  margin-top: 56px;
}

.cas-footer h3,
.cas-footer h4 {
  color: #f8fafc;
}

.cas-footer-specbar {
  background: #1e293b;
  border-bottom: 1px solid #334155;
  padding: 12px 0;
  font-family: var(--cas-font-mono);
  font-size: 0.75rem;
  color: #cbd5e1;
}

.cas-footer-specbar-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
}

.cas-footer-specbar strong {
  color: #5eead4;
}

.cas-footer-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr 1fr;
  gap: 28px;
  padding: 44px 20px 32px;
}

.cas-footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
}

.cas-footer-brand-name {
  font-family: var(--cas-font-serif);
  font-size: 1.2rem;
  font-weight: 700;
  color: #f8fafc;
}

.cas-footer-desc {
  font-size: 0.9rem;
  color: #cbd5e1;
}

.cas-footer-heading {
  font-family: var(--cas-font-sans);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: #f8fafc;
  margin-bottom: 14px;
}

.cas-footer-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.cas-footer-link,
.cas-footer a.cas-footer-link {
  color: #e2e8f0;
  text-decoration: none;
  font-size: 0.9rem;
}

.cas-footer-link:hover,
.cas-footer a.cas-footer-link:hover {
  color: #5eead4;
}

.cas-footer-disclosures {
  border-top: 1px solid #1e293b;
  padding: 18px 20px;
  font-size: 0.82rem;
  color: #94a3b8;
}

.cas-footer-bottom {
  border-top: 1px solid #1e293b;
  padding: 18px 20px 28px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-size: 0.85rem;
  color: #94a3b8;
}

.cas-footer-legal {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

/* Responsive Breakpoints */
@media (max-width: 1040px) {
  .cas-hero-grid,
  .cas-calc-dual-grid,
  .cas-tabpanel-grid,
  .cas-content-with-sidebar {
    grid-template-columns: 1fr;
  }

  .cas-footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 820px) {
  .cas-mobile-toggle {
    display: inline-flex;
  }

  .cas-nav {
    position: fixed;
    top: 0;
    right: -300px;
    width: 280px;
    height: 100vh;
    background: var(--cas-bg-card);
    border-left: 1px solid var(--cas-border-strong);
    padding: 24px 18px;
    transition: right 0.22s ease;
    z-index: 1200;
    overflow-y: auto;
  }

  .cas-nav.is-open {
    right: 0;
  }

  .cas-nav-list {
    flex-direction: column;
    align-items: stretch;
  }

  .cas-nav-cta {
    margin-left: 0;
    margin-top: 8px;
    justify-content: center;
  }

  .cas-nav-backdrop.is-open {
    display: block;
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.55);
    z-index: 1100;
  }

  .cas-tablist {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .cas-metric-strip,
  .cas-form-grid,
  .cas-climate-btn-grid,
  .cas-output-grid,
  .cas-cards-grid-2,
  .cas-contact-cards-row,
  .cas-tablist,
  .cas-footer-grid {
    grid-template-columns: 1fr;
  }

  .cas-article-main {
    padding: 20px;
  }
}