/* ==========================================================================
   AI Receptionist for Accounting Firms — Bespoke Architectural Stylesheet
   Crafted to Impeccable standards: no lazy cards, no kickers/eyebrows,
   no thick colored left-borders, acoustic telemetry, dark field plates.
   ========================================================================== */

.voice-ai-page {
  --vai-paper: #f7f6f0;
  --vai-white: #ffffff;
  --vai-ink: #132328;
  --vai-muted: #54656b;
  --vai-bronze: #8c6534;
  --vai-gold: #c59f3d;
  --vai-teal: #18635a;
  --vai-teal-light: #227c71;
  --vai-forest: #0f3d37;
  --vai-crimson: #942b1f;
  --vai-crimson-bg: #fcf1ef;
  --vai-rule: #d2d7cf;
  --vai-soft: #eceee6;
  --vai-dark: #102227;
  --vai-dark-surface: #162c33;
  --vai-dark-card: #1c363e;
  --vai-dark-rule: #2a4b54;
  --vai-inverse: #d8e5e0;
  --vai-serif: var(--font-serif), "Cormorant Garamond Variable", Georgia, serif;
  --vai-sans: var(--font-sans), "DM Sans Variable", -apple-system, BlinkMacSystemFont, sans-serif;
  --vai-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  color: var(--vai-ink);
  background: var(--vai-paper);
  font-family: var(--vai-sans);
  font-size: 16px;
  line-height: 1.75;
  color-scheme: light;
  isolation: isolate;
  padding-top: clamp(120px, 10vw, 150px);
}

.voice-ai-page *,
.voice-ai-page *::before,
.voice-ai-page *::after {
  box-sizing: border-box;
}

.voice-ai-page ::selection {
  background: #cde4e0;
  color: #132328;
}

.voice-ai-page h1,
.voice-ai-page h2,
.voice-ai-page h3,
.voice-ai-page h4,
.voice-ai-page p,
.voice-ai-page figure,
.voice-ai-page blockquote {
  margin: 0;
}

.voice-ai-page h1,
.voice-ai-page h2,
.voice-ai-page h3,
.voice-ai-page h4 {
  color: inherit;
  text-wrap: balance;
}

.voice-ai-page p {
  max-width: 72ch;
}

.voice-ai-page p + p {
  margin-top: 18px;
}

.voice-ai-page h1 {
  font-family: var(--vai-serif);
  font-size: clamp(3.1rem, 5vw, 5.2rem);
  font-weight: 500;
  letter-spacing: -0.035em;
  line-height: 1.04;
}

.voice-ai-page h1 em {
  color: var(--vai-teal);
  font-style: italic;
  font-weight: inherit;
}

.voice-ai-page h2 {
  font-family: var(--vai-serif);
  font-size: clamp(2.3rem, 3.4vw, 3.6rem);
  font-weight: 500;
  letter-spacing: -0.025em;
  line-height: 1.1;
}

.voice-ai-page h2 em {
  font-style: italic;
  color: var(--vai-teal);
  font-weight: inherit;
}

.voice-ai-page h3 {
  font-family: var(--vai-serif);
  font-size: clamp(1.6rem, 2.2vw, 2.2rem);
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.voice-ai-page h4 {
  font-family: var(--vai-sans);
  font-size: 1.0625rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.4;
}

.vai-wrap {
  width: min(1280px, calc(100% - 48px));
  margin-inline: auto;
}

@media (max-width: 640px) {
  .vai-wrap {
    width: min(100% - 32px, 1280px);
  }
}

/* ==========================================================================
   Hero Section
   ========================================================================== */

.vai-hero {
  padding: 24px 0 64px;
}

.vai-badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  margin-bottom: 24px;
}

.vai-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: var(--vai-soft);
  color: var(--vai-bronze);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border: 1px solid var(--vai-rule);
}

.vai-badge-claim {
  background: rgba(24, 99, 90, 0.09);
  color: var(--vai-teal);
  border-color: rgba(24, 99, 90, 0.25);
}

.vai-lede {
  font-size: clamp(1.18rem, 1.8vw, 1.38rem);
  line-height: 1.62;
  color: var(--vai-ink);
  margin-top: 24px;
  max-width: 78ch;
}

.vai-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
  margin-top: 32px;
  margin-bottom: 48px;
}

.vai-btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  background: var(--vai-teal);
  color: #ffffff;
  font-weight: 600;
  font-size: 0.9375rem;
  letter-spacing: 0.02em;
  text-decoration: none;
  border: 1px solid var(--vai-teal);
  transition: all 0.2s ease;
}

.vai-btn-primary:hover {
  background: var(--vai-forest);
  border-color: var(--vai-forest);
  color: #ffffff;
}

.vai-btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  background: transparent;
  color: var(--vai-ink);
  font-weight: 600;
  font-size: 0.9375rem;
  text-decoration: none;
  border: 1px solid var(--vai-rule);
  transition: all 0.2s ease;
}

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

.vai-hero-figure {
  margin: 0;
  border: 1px solid var(--vai-rule);
  background: var(--vai-white);
  box-shadow: 0 16px 40px -12px rgba(19, 35, 40, 0.08);
}

.vai-hero-caption {
  padding: 16px 20px;
  background: var(--vai-soft);
  border-top: 1px solid var(--vai-rule);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.8125rem;
  color: var(--vai-muted);
}

.vai-hero-caption strong {
  color: var(--vai-ink);
}

/* ==========================================================================
   Sticky Section Navigation Rail
   ========================================================================== */

.vai-nav-rail {
  position: sticky;
  top: 76px;
  z-index: 40;
  background: rgba(247, 246, 240, 0.96);
  backdrop-filter: blur(12px);
  border-block: 1px solid var(--vai-rule);
  padding: 10px 0;
  margin-bottom: 56px;
}

.vai-nav-scroll {
  display: flex;
  align-items: center;
  gap: 20px;
  overflow-x: auto;
  white-space: nowrap;
  scrollbar-width: none;
}

.vai-nav-scroll::-webkit-scrollbar {
  display: none;
}

.vai-nav-link {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--vai-muted);
  text-decoration: none;
  letter-spacing: 0.04em;
  padding: 4px 0;
  border-bottom: 2px solid transparent;
  transition: all 0.15s ease;
}

.vai-nav-link:hover {
  color: var(--vai-teal);
  border-bottom-color: var(--vai-teal);
}

/* ==========================================================================
   Section Layouts
   ========================================================================== */

.vai-section {
  padding: clamp(64px, 8vw, 96px) 0;
  border-top: 1px solid var(--vai-rule);
}

.vai-section-header {
  margin-bottom: 40px;
}

.vai-section-header p {
  font-size: clamp(1.0625rem, 1.4vw, 1.25rem);
  color: var(--vai-muted);
  line-height: 1.6;
  margin-top: 14px;
}

/* ==========================================================================
   Editorial Split & Ledger Plate
   ========================================================================== */

.vai-split-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 40px;
  align-items: start;
}

@media (max-width: 960px) {
  .vai-split-grid {
    grid-template-columns: 1fr;
  }
}

.vai-prose-block {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.vai-editorial-box {
  background: var(--vai-white);
  border: 1px solid var(--vai-rule);
  padding: 32px;
}

.vai-editorial-label {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--vai-bronze);
  margin-bottom: 8px;
  display: block;
}

.vai-ledger-plate {
  background: var(--vai-dark);
  color: #ffffff;
  border: 1px solid var(--vai-dark-rule);
  padding: 32px;
  position: relative;
}

.vai-ledger-head {
  padding-bottom: 18px;
  border-bottom: 1px solid var(--vai-dark-rule);
  margin-bottom: 20px;
}

.vai-ledger-tag {
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--vai-gold);
}

.vai-ledger-title {
  font-family: var(--vai-serif);
  font-size: 1.65rem;
  font-weight: 500;
  margin-top: 4px;
  color: #ffffff;
}

.vai-ledger-item {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 14px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.vai-ledger-item:last-of-type {
  border-bottom: none;
}

.vai-ledger-label {
  font-size: 0.875rem;
  color: var(--vai-inverse);
  max-width: 65%;
  line-height: 1.45;
}

.vai-ledger-val {
  font-size: 1.25rem;
  font-weight: 700;
  font-family: var(--vai-mono);
  color: #f87171;
  text-align: right;
}

.vai-ledger-val.val-teal {
  color: #5eead4;
}

.vai-ledger-footer {
  margin-top: 24px;
  padding-top: 18px;
  border-top: 1px solid var(--vai-dark-rule);
  font-size: 0.8125rem;
  color: var(--vai-inverse);
  line-height: 1.5;
}

/* ==========================================================================
   Conversational Scenarios Matrix
   ========================================================================== */

.vai-scenarios-grid {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.vai-scenario-card {
  background: var(--vai-white);
  border: 1px solid var(--vai-rule);
  padding: 32px;
}

.vai-scenario-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 12px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--vai-rule);
  margin-bottom: 20px;
}

.vai-scenario-badge {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: 4px 10px;
  background: var(--vai-soft);
  color: var(--vai-ink);
  border: 1px solid var(--vai-rule);
}

.vai-scenario-badge.badge-teal {
  background: rgba(24, 99, 90, 0.09);
  color: var(--vai-teal);
  border-color: rgba(24, 99, 90, 0.25);
}

.vai-scenario-badge.badge-bronze {
  background: rgba(140, 101, 52, 0.09);
  color: var(--vai-bronze);
  border-color: rgba(140, 101, 52, 0.25);
}

.vai-scenario-context {
  font-size: 0.9375rem;
  line-height: 1.6;
  color: var(--vai-ink);
  margin-bottom: 24px;
}

.vai-scenario-compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

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

.vai-dialogue-box {
  padding: 20px;
  border: 1px solid var(--vai-rule);
}

.vai-dialogue-box.box-fail {
  background: var(--vai-crimson-bg);
  border-color: rgba(148, 43, 31, 0.2);
}

.vai-dialogue-box.box-tqp {
  background: var(--vai-dark);
  color: #ffffff;
  border-color: var(--vai-dark-rule);
}

.vai-dialogue-title {
  display: block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 10px;
}

.box-fail .vai-dialogue-title {
  color: var(--vai-crimson);
}

.box-tqp .vai-dialogue-title {
  color: var(--vai-gold);
}

.vai-dialogue-text {
  font-size: 0.875rem;
  line-height: 1.6;
  margin: 0;
}

.box-fail .vai-dialogue-text {
  color: var(--vai-ink);
}

.box-tqp .vai-dialogue-text {
  color: var(--vai-inverse);
}

/* ==========================================================================
   Audio Architecture Specimen (S2S vs Legacy)
   ========================================================================== */

.vai-spec-grid {
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  gap: 28px;
}

@media (max-width: 960px) {
  .vai-spec-grid {
    grid-template-columns: 1fr;
  }
}

.vai-spec-card {
  padding: 32px 28px;
  border: 1px solid var(--vai-rule);
  background: var(--vai-white);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.vai-spec-card.spec-active {
  background: var(--vai-dark);
  color: #ffffff;
  border-color: var(--vai-dark-rule);
}

.vai-spec-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.vai-spec-latency {
  font-family: var(--vai-mono);
  font-size: 0.8125rem;
  font-weight: 700;
  padding: 3px 8px;
}

.spec-active .vai-spec-latency {
  background: rgba(94, 234, 212, 0.15);
  color: #5eead4;
  border: 1px solid rgba(94, 234, 212, 0.3);
}

.vai-spec-card:not(.spec-active) .vai-spec-latency {
  background: var(--vai-crimson-bg);
  color: var(--vai-crimson);
  border: 1px solid rgba(148, 43, 31, 0.2);
}

/* ==========================================================================
   Compliance & Guardrails Cards
   ========================================================================== */

.vai-compliance-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.vai-compliance-plate {
  background: var(--vai-white);
  border: 1px solid var(--vai-rule);
  padding: 32px 28px;
}

.vai-compliance-code {
  font-family: var(--vai-mono);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--vai-bronze);
  text-transform: uppercase;
  margin-bottom: 8px;
  display: block;
}

.vai-compliance-plate h4 {
  font-size: 1.2rem;
  color: var(--vai-ink);
  margin-bottom: 12px;
}

.vai-compliance-plate p {
  font-size: 0.875rem;
  color: var(--vai-muted);
  line-height: 1.6;
}

/* ==========================================================================
   Final Conversion Banner
   ========================================================================== */

.vai-final-banner {
  margin-top: 64px;
  padding: clamp(40px, 6vw, 64px) 32px;
  background: var(--vai-dark);
  color: #ffffff;
  border: 1px solid var(--vai-dark-rule);
  text-align: center;
}

.vai-final-banner h2 {
  color: #ffffff;
  font-size: clamp(2.2rem, 3.5vw, 3.4rem);
  margin-bottom: 16px;
}

.vai-final-banner p {
  max-width: 65ch;
  margin: 0 auto 32px;
  color: var(--vai-inverse);
  font-size: 1.0625rem;
  line-height: 1.65;
}

.vai-final-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}