/* =========================================================
   LINCR Design System — Healthcare Biotech Aesthetic
   Dark-first, teal accent (#01696F), data-driven
   ========================================================= */

/* --- Design Tokens --- */
:root {
  --font-body: 'General Sans', 'Helvetica Neue', sans-serif;
  --font-display: 'Satoshi', 'General Sans', sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', monospace;

  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.75vw, 1.5rem);
  --text-xl: clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl: clamp(2rem, 1.2rem + 2.5vw, 3.5rem);
  --text-3xl: clamp(2.5rem, 1rem + 4vw, 5rem);

  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);

  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;
}

/* --- DARK MODE (default) --- */
:root,
[data-theme='dark'] {
  --color-bg: #0a0c0e;
  --color-surface: #0f1215;
  --color-surface-2: #141719;
  --color-surface-offset: #111417;
  --color-surface-offset-2: #181b1e;
  --color-divider: #1f2326;
  --color-border: #272b2f;

  --color-text: #d4d8dc;
  --color-text-muted: #7a8089;
  --color-text-faint: #484e57;

  --color-primary: #01696f;
  --color-primary-light: #0a8f97;
  --color-primary-lighter: #14b8c2;
  --color-primary-dim: #064e53;
  --color-primary-bg: rgba(1, 105, 111, 0.08);
  --color-primary-border: rgba(1, 105, 111, 0.2);

  --color-green: #22c55e;
  --color-yellow: #eab308;
  --color-red: #ef4444;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.4);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.5);
}

/* --- LIGHT MODE --- */
[data-theme='light'] {
  --color-bg: #f5f6f8;
  --color-surface: #ffffff;
  --color-surface-2: #fafbfc;
  --color-surface-offset: #eef0f2;
  --color-surface-offset-2: #e4e7ea;
  --color-divider: #d8dce0;
  --color-border: #c8ccd2;

  --color-text: #1a1e24;
  --color-text-muted: #5a6270;
  --color-text-faint: #a0a8b4;

  --color-primary: #01696f;
  --color-primary-light: #078890;
  --color-primary-lighter: #01696f;
  --color-primary-dim: #e0f2f3;
  --color-primary-bg: rgba(1, 105, 111, 0.05);
  --color-primary-border: rgba(1, 105, 111, 0.15);

  --color-green: #16a34a;
  --color-yellow: #ca8a04;
  --color-red: #dc2626;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
}

/* System preference fallback */
@media (prefers-color-scheme: light) {
  :root:not([data-theme]) {
    --color-bg: #f5f6f8;
    --color-surface: #ffffff;
    --color-surface-2: #fafbfc;
    --color-surface-offset: #eef0f2;
    --color-surface-offset-2: #e4e7ea;
    --color-divider: #d8dce0;
    --color-border: #c8ccd2;
    --color-text: #1a1e24;
    --color-text-muted: #5a6270;
    --color-text-faint: #a0a8b4;
    --color-primary: #01696f;
    --color-primary-light: #078890;
    --color-primary-lighter: #01696f;
    --color-primary-dim: #e0f2f3;
    --color-primary-bg: rgba(1, 105, 111, 0.05);
    --color-primary-border: rgba(1, 105, 111, 0.15);
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
    --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
  }
}

/* =========================================================
   NAVIGATION
   ========================================================= */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: color-mix(in srgb, var(--color-bg) 85%, transparent);
  backdrop-filter: blur(16px) saturate(1.2);
  -webkit-backdrop-filter: blur(16px) saturate(1.2);
  border-bottom: 1px solid var(--color-divider);
}

.nav-container {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: var(--space-3) var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  text-decoration: none;
  color: var(--color-text);
  flex-shrink: 0;
}

.logo svg {
  color: var(--color-primary-light);
}

.logo-text {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-lg);
  letter-spacing: 0.1em;
}

.nav-links {
  display: flex;
  gap: var(--space-8);
}

.nav-links a {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  letter-spacing: 0.02em;
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-primary-light);
  transition: width 300ms var(--ease-out);
}

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

.nav-links a:hover::after {
  width: 100%;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  color: var(--color-text-muted);
  transition: color var(--transition-interactive), background var(--transition-interactive);
}

.theme-toggle:hover {
  color: var(--color-text);
  background: var(--color-surface-offset-2);
}

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 36px;
  height: 36px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
}

.mobile-menu-btn span {
  display: block;
  width: 20px;
  height: 1.5px;
  background: var(--color-text-muted);
  transition: all 250ms var(--ease-out);
}

/* =========================================================
   HERO
   ========================================================= */
.hero {
  position: relative;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-32) var(--space-6) var(--space-16);
  overflow: hidden;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--color-divider) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-divider) 1px, transparent 1px);
  background-size: 60px 60px;
  opacity: 0.25;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 45%, black 20%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 45%, black 20%, transparent 70%);
}

.hero-inner {
  position: relative;
  z-index: 1;
  max-width: var(--content-default);
  text-align: left;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-primary-light);
  letter-spacing: 0.04em;
  padding: var(--space-2) var(--space-4);
  border: 1px solid var(--color-primary-border);
  border-radius: var(--radius-full);
  background: var(--color-primary-bg);
  margin-bottom: var(--space-8);
}

.badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-primary-light);
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero-headline {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.05;
  color: var(--color-text);
  margin-bottom: var(--space-6);
}

.hero-sub {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 56ch;
  line-height: 1.6;
  margin-bottom: var(--space-10);
}

.cta-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  color: #fff;
  background: var(--color-primary);
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  text-decoration: none;
  letter-spacing: 0.02em;
  transition: background var(--transition-interactive), transform var(--transition-interactive), box-shadow var(--transition-interactive);
}

.cta-btn:hover {
  background: var(--color-primary-light);
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(1, 105, 111, 0.3);
}

.cta-btn:active {
  transform: translateY(0);
}

.cta-btn svg {
  display: inline;
  width: 16px;
  height: 16px;
}

/* =========================================================
   SECTIONS — shared
   ========================================================= */
.section {
  padding: clamp(var(--space-16), 8vw, var(--space-32)) var(--space-6);
}

.section-container {
  max-width: var(--content-wide);
  margin: 0 auto;
}

.section-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-primary-light);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: var(--space-3);
}

.section-heading {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

.section-subheading {
  font-family: var(--font-body);
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  font-weight: 400;
  margin-bottom: var(--space-2);
}

.section-intro {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 64ch;
  margin-bottom: var(--space-12);
}

.mono-inline {
  font-family: var(--font-mono);
  font-weight: 500;
  color: var(--color-text);
}

/* Alternate section backgrounds */
.section--science,
.section--flywheel {
  background: var(--color-surface);
}

/* =========================================================
   PLATFORM — Closed Loop Diagram
   ========================================================= */
.loop-diagram {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  align-items: start;
  gap: var(--space-4);
  margin-top: var(--space-8);
  position: relative;
  padding-bottom: var(--space-16);
}

.loop-phase {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  position: relative;
}

[data-theme='light'] .loop-phase,
[data-theme='light'] .section--science .loop-phase {
  background: var(--color-surface-2);
}

.section--science .loop-phase {
  background: var(--color-surface-offset);
}

.loop-phase-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--color-primary-light);
  margin-bottom: var(--space-2);
}

.loop-phase-product {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-3);
}

.loop-phase-items {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.loop-phase-items li {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  padding-left: var(--space-4);
  position: relative;
}

.loop-phase-items li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.65em;
  width: 6px;
  height: 1px;
  background: var(--color-primary-light);
}

.loop-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-faint);
  padding-top: var(--space-12);
}

.loop-feedback {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  text-align: center;
}

.feedback-svg {
  width: 100%;
  height: 40px;
  color: var(--color-primary-light);
  opacity: 0.4;
}

.feedback-label {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-primary-light);
  margin-top: var(--space-1);
  opacity: 0.8;
}

/* =========================================================
   SCIENCE — Performance Table
   ========================================================= */
.table-wrapper {
  overflow-x: auto;
  margin-bottom: var(--space-12);
  -webkit-overflow-scrolling: touch;
}

.perf-table {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  min-width: 580px;
}

.perf-table thead {
  border-bottom: 2px solid var(--color-border);
}

.perf-table th {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  padding: var(--space-3) var(--space-4);
  text-align: left;
  white-space: nowrap;
}

.perf-table th:not(:first-child) {
  text-align: right;
}

.perf-table td {
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-divider);
  color: var(--color-text);
}

.perf-table td:not(:first-child) {
  text-align: right;
}

.perf-table .num {
  font-family: var(--font-mono);
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  font-size: var(--text-sm);
}

.perf-table .ref-row {
  opacity: 0.6;
}

.ref-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--color-text-faint);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 1px 6px;
  margin-left: var(--space-2);
  vertical-align: middle;
}

.ref-cite {
  font-style: italic;
  color: var(--color-text-faint);
  font-size: var(--text-xs);
}

/* Architecture Pipeline */
.architecture {
  background: var(--color-surface-offset);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  margin-bottom: var(--space-8);
  overflow-x: auto;
}

[data-theme='light'] .architecture {
  background: var(--color-surface);
}

.arch-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: var(--space-4);
}

.arch-pipeline {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.arch-block {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
  background: var(--color-primary-bg);
  border: 1px solid var(--color-primary-border);
  border-radius: var(--radius-md);
  padding: var(--space-2) var(--space-4);
  white-space: nowrap;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.arch-dim {
  font-size: var(--text-xs);
  font-weight: 400;
  color: var(--color-text-faint);
}

.arch-arrow {
  font-family: var(--font-mono);
  color: var(--color-text-faint);
  font-size: var(--text-lg);
}

/* Science Detail Rows */
.science-detail {
  margin-bottom: var(--space-8);
}

.detail-row {
  display: flex;
  gap: var(--space-4);
  align-items: baseline;
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-divider);
}

.detail-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-primary-light);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  min-width: 100px;
  flex-shrink: 0;
}

.detail-value {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* Formula */
.formula-block {
  background: var(--color-surface-offset);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  text-align: center;
}

[data-theme='light'] .formula-block {
  background: var(--color-surface);
}

.formula-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text-faint);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: var(--space-4);
}

.formula {
  font-family: var(--font-mono);
  font-size: var(--text-xl);
  color: var(--color-text);
  font-weight: 500;
  letter-spacing: 0.02em;
}

.formula-sym {
  font-weight: 700;
  font-style: italic;
  color: var(--color-primary-lighter);
}

.formula-sum {
  font-size: 1.3em;
  vertical-align: -0.05em;
}

.formula-var {
  font-style: italic;
}

.formula-var sub {
  font-size: 0.7em;
  font-style: normal;
}

/* =========================================================
   PreopHQ — Feature Cards
   ========================================================= */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
  margin-bottom: var(--space-12);
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.feature-card {
  padding: var(--space-8) var(--space-6);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  position: relative;
}

[data-theme='light'] .feature-card {
  background: var(--color-surface);
}

.feature-number {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-primary-light);
  margin-bottom: var(--space-4);
}

.feature-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-3);
  line-height: 1.3;
}

.feature-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.65;
}

.stat-highlight {
  color: var(--color-primary-lighter);
  font-family: var(--font-mono);
  font-weight: 600;
}

.triage-dots {
  display: flex;
  gap: var(--space-3);
  margin-top: var(--space-4);
}

.triage-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.triage-dot--green { background: var(--color-green); }
.triage-dot--yellow { background: var(--color-yellow); }
.triage-dot--red { background: var(--color-red); }

/* PreopHQ Meta */
.preophq-meta {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.meta-badge {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  padding: var(--space-4) var(--space-6);
  background: var(--color-primary-bg);
  border: 1px solid var(--color-primary-border);
  border-radius: var(--radius-md);
  line-height: 1.5;
}

.meta-badge-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-primary-light);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-right: var(--space-3);
}

.meta-pricing {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
}

.meta-tag {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 500;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
  padding: var(--space-1) var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
}

.meta-sep {
  color: var(--color-text-faint);
}

.meta-price {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text);
}

.meta-unit {
  font-size: var(--text-sm);
  font-weight: 400;
  color: var(--color-text-muted);
}

/* Regulatory & IP Cards */
.regulatory-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
  max-width: 800px;
  margin: var(--space-10) auto 0;
}

.reg-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8) var(--space-6);
}

.reg-card-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-primary-light);
  margin-bottom: var(--space-2);
}

.reg-card-subtitle {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

.reg-card-detail {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-6);
}

.reg-card-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.reg-card-list li {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  padding-left: 1.4em;
  position: relative;
  line-height: 1.5;
}

.reg-card-list li::before {
  content: '\2713';
  position: absolute;
  left: 0;
  color: var(--color-primary-light);
  font-weight: 600;
}

.reg-card-note {
  margin-top: var(--space-6);
  font-size: var(--text-xs);
  color: var(--color-primary-light);
  font-style: italic;
}

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

/* =========================================================
   PRICING
   ========================================================= */
.section--pricing {
  background: var(--color-bg);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
  margin-top: var(--space-12);
  max-width: 960px;
  margin-left: auto;
  margin-right: auto;
}

.pricing-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform var(--transition-interactive), box-shadow var(--transition-interactive);
}

.pricing-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.15);
}

.pricing-card--featured {
  background: var(--color-primary);
  border-color: var(--color-primary);
  position: relative;
}

.pricing-card-header {
  padding: var(--space-6) var(--space-6) 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.pricing-tier {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  letter-spacing: 0.03em;
}

.pricing-card--featured .pricing-tier {
  color: rgba(255, 255, 255, 0.8);
}

.pricing-badge {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.9);
  background: rgba(255, 255, 255, 0.15);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
}

.pricing-card-body {
  padding: var(--space-4) var(--space-6) var(--space-8);
}

.pricing-amount {
  display: flex;
  align-items: baseline;
  gap: 0.15em;
  margin-bottom: var(--space-6);
}

.pricing-currency {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text);
  line-height: 1;
}

.pricing-card--featured .pricing-currency {
  color: #fff;
}

.pricing-value {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 2rem + 2vw, 3.5rem);
  font-weight: 900;
  color: var(--color-text);
  line-height: 1;
  letter-spacing: -0.02em;
}

.pricing-card--featured .pricing-value {
  color: #fff;
}

.pricing-value--custom {
  font-size: clamp(2rem, 1.5rem + 2vw, 2.75rem);
  font-weight: 700;
}

.pricing-period {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-left: 0.25em;
}

.pricing-card--featured .pricing-period {
  color: rgba(255, 255, 255, 0.7);
}

.pricing-features {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.pricing-features li {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  padding-left: 1.4em;
  position: relative;
  line-height: 1.5;
}

.pricing-features li::before {
  content: '\2713';
  position: absolute;
  left: 0;
  color: var(--color-primary-light);
  font-weight: 600;
}

.pricing-card--featured .pricing-features li {
  color: rgba(255, 255, 255, 0.85);
}

.pricing-card--featured .pricing-features li::before {
  color: rgba(255, 255, 255, 0.95);
}

/* ROI Callout */
.pricing-roi {
  margin-top: var(--space-10);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-6) var(--space-8);
  max-width: 960px;
  margin-left: auto;
  margin-right: auto;
}

.pricing-roi-header {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-6);
}

.pricing-roi-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-6);
}

.pricing-roi-stat {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.pricing-roi-value {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-primary-light);
  line-height: 1.2;
}

.pricing-roi-value--green {
  color: #22c55e;
}

.pricing-roi-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  line-height: 1.4;
}

.pricing-roi-detail {
  color: var(--color-text-faint);
  font-size: 0.75rem;
}

/* Founding Rate */
.pricing-founding {
  margin-top: var(--space-8);
  text-align: center;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.pricing-founding-badge {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-primary-light);
  background: var(--color-primary-bg);
  border: 1px solid var(--color-primary-border);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
}

.pricing-founding-text {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* Pricing responsive */
@media (max-width: 768px) {
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 400px;
  }

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

@media (max-width: 480px) {
  .pricing-roi-grid {
    grid-template-columns: 1fr;
  }

  .pricing-founding {
    flex-direction: column;
    text-align: center;
  }
}

/* =========================================================
   FLYWHEEL
   ========================================================= */
.flywheel {
  display: flex;
  justify-content: center;
  margin: var(--space-12) 0;
}

.flywheel-ring {
  position: relative;
  width: 320px;
  height: 320px;
}

.flywheel-arrows {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  color: var(--color-primary-light);
}

.flywheel-node {
  position: absolute;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  white-space: nowrap;
}

.fw-num {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-primary-light);
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  border: 1px solid var(--color-primary-border);
  background: var(--color-primary-bg);
  flex-shrink: 0;
}

.fw-text {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text);
}

/* Position nodes around the circle (r=110, center at 160,160) */
.flywheel-node--1 { top: 2%; left: 50%; transform: translateX(-50%); }
.flywheel-node--2 { top: 28%; right: -10%; }
.flywheel-node--3 { top: 68%; right: -5%; }
.flywheel-node--4 { top: 68%; left: -5%; }
.flywheel-node--5 { top: 28%; left: -10%; }

.moat-statement {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 60ch;
  margin: 0 auto;
  text-align: center;
  font-style: italic;
  line-height: 1.7;
}

.moat-statement em {
  color: var(--color-primary-light);
  font-style: italic;
}

/* =========================================================
   FOUNDER
   ========================================================= */
.founder-content {
  display: flex;
  align-items: flex-start;
  gap: var(--space-8);
}

.founder-initial {
  flex-shrink: 0;
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--color-primary-bg);
  border: 1px solid var(--color-primary-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-xl);
  color: var(--color-primary-light);
  letter-spacing: 0.02em;
}

.founder-name {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.founder-title {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  letter-spacing: 0.02em;
  margin-bottom: var(--space-4);
}

.founder-bio {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.7;
  max-width: 54ch;
}

/* =========================================================
   FOOTER
   ========================================================= */
.site-footer {
  border-top: 1px solid var(--color-divider);
  padding: var(--space-12) var(--space-6) var(--space-8);
}

.footer-container {
  max-width: var(--content-wide);
  margin: 0 auto;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: var(--space-12);
  gap: var(--space-8);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer-logo .logo-text {
  font-size: var(--text-base);
}

.footer-email {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
}

.footer-email:hover {
  color: var(--color-primary-light);
}

.footer-nav {
  display: flex;
  gap: var(--space-6);
}

.footer-nav a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
}

.footer-nav a:hover {
  color: var(--color-text);
}

.footer-bottom {
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-divider);
}

.footer-bottom p {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

/* =========================================================
   ANIMATIONS — Scroll reveals (CSS native)
   ========================================================= */
.fade-in {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 600ms var(--ease-out), transform 600ms var(--ease-out);
}

.fade-in.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* =========================================================
   MOBILE OVERLAY (body-level, escapes backdrop-filter)
   ========================================================= */
.mobile-overlay {
  display: none;
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100vh;
  height: 100dvh;
  background: var(--color-bg);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-8);
  z-index: 100;
  list-style: none;
}

.mobile-overlay.is-open {
  display: flex;
}

.mobile-overlay a {
  font-size: var(--text-xl);
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  letter-spacing: 0.02em;
  transition: color var(--transition-interactive);
}

.mobile-overlay a:hover,
.mobile-overlay a:active {
  color: var(--color-text);
}

/* =========================================================
   RESPONSIVE — Mobile
   ========================================================= */
@media (max-width: 768px) {
  .nav-links {
    display: none;
    position: fixed;
    inset: 0;
    width: 100vw;
    height: 100vh;
    height: 100dvh;
    background: var(--color-bg);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-8);
    z-index: 100;
  }

  .nav-links.is-open {
    display: flex;
  }

  .nav-links a {
    font-size: var(--text-lg);
  }

  .mobile-menu-btn {
    display: flex;
    position: relative;
    z-index: 102;
  }

  .theme-toggle {
    position: relative;
    z-index: 102;
  }

  /* Ensure header controls are above the mobile overlay */
  .site-header {
    z-index: 101;
  }

  .mobile-menu-btn.is-open span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }
  .mobile-menu-btn.is-open span:nth-child(2) {
    opacity: 0;
  }
  .mobile-menu-btn.is-open span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  .hero {
    padding-top: var(--space-24);
    min-height: auto;
    padding-bottom: var(--space-12);
  }

  .hero-headline {
    font-size: clamp(2rem, 1rem + 5vw, 3.5rem);
  }

  .hero-sub {
    font-size: var(--text-base);
  }

  /* Loop diagram stacks */
  .loop-diagram {
    grid-template-columns: 1fr;
    gap: var(--space-4);
    padding-bottom: var(--space-4);
  }

  .loop-arrow {
    transform: rotate(90deg);
    padding-top: 0;
  }

  .loop-feedback {
    position: relative;
    margin-top: var(--space-4);
  }

  .feedback-svg {
    display: none;
  }

  .feedback-label {
    padding: var(--space-3);
    border: 1px dashed var(--color-primary-border);
    border-radius: var(--radius-md);
  }

  /* Feature grid stacks */
  .feature-grid {
    grid-template-columns: 1fr;
  }

  /* Science arch pipeline wraps */
  .arch-pipeline {
    gap: var(--space-2);
  }

  .arch-arrow {
    display: none;
  }

  .arch-block {
    font-size: var(--text-xs);
    padding: var(--space-2) var(--space-3);
  }

  /* Formula smaller */
  .formula {
    font-size: var(--text-lg);
  }

  /* Flywheel */
  .flywheel-ring {
    width: 260px;
    height: 260px;
  }

  .flywheel-node--2,
  .flywheel-node--3 { right: -20%; }
  .flywheel-node--4,
  .flywheel-node--5 { left: -20%; }

  /* Founder */
  .founder-content {
    flex-direction: column;
  }

  /* Footer */
  .footer-top {
    flex-direction: column;
  }

  .footer-nav {
    flex-wrap: wrap;
    gap: var(--space-4);
  }

  /* Section heading sizes */
  .section-heading {
    font-size: var(--text-xl);
  }

  /* Table */
  .perf-table th,
  .perf-table td {
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-xs);
  }
}

/* Medium screens */
@media (min-width: 769px) and (max-width: 1024px) {
  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Large screens - wider hero */
@media (min-width: 1200px) {
  .hero-inner {
    max-width: 800px;
  }
}

/* =========================================================
   HERO CTAs
   ========================================================= */
.hero-ctas {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.cta-btn--hero {
  font-size: var(--text-base);
  padding: var(--space-4) var(--space-8);
  border-radius: var(--radius-lg);
  background: var(--color-primary);
  color: #fff;
  box-shadow: 0 0 30px rgba(1, 105, 111, 0.35), 0 0 60px rgba(1, 105, 111, 0.15);
  position: relative;
}

.cta-btn--hero::before {
  content: '';
  position: absolute;
  inset: -2px;
  border-radius: calc(var(--radius-lg) + 2px);
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary), var(--color-primary-light));
  z-index: -1;
  opacity: 0.6;
  animation: hero-glow 3s ease-in-out infinite;
}

@keyframes hero-glow {
  0%, 100% { opacity: 0.4; transform: scale(1); }
  50% { opacity: 0.7; transform: scale(1.02); }
}

.cta-btn--hero:hover {
  box-shadow: 0 0 40px rgba(1, 105, 111, 0.5), 0 0 80px rgba(1, 105, 111, 0.2);
  transform: translateY(-2px);
}

.cta-btn--ghost {
  background: transparent;
  color: var(--color-text-secondary);
  border: 1px solid var(--color-border);
}

.cta-btn--ghost:hover {
  background: var(--color-surface-elevated);
  color: var(--color-text-primary);
  border-color: var(--color-text-secondary);
  box-shadow: none;
}

/* =========================================================
   DEMO SECTION
   ========================================================= */
.section--demo {
  border-top: 1px solid var(--color-border);
}

.demo-screens {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-6);
  margin-top: var(--space-10);
  margin-bottom: var(--space-10);
}

@media (min-width: 768px) {
  .demo-screens {
    grid-template-columns: repeat(3, 1fr);
  }
}

.demo-screen {
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  overflow: hidden;
  background: var(--color-surface);
  transition: transform var(--transition-interactive), box-shadow var(--transition-interactive);
}

.demo-screen:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0,0,0,0.3);
}

.demo-screen-header {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: var(--space-3) var(--space-4);
  background: var(--color-surface-elevated);
  border-bottom: 1px solid var(--color-border);
}

.demo-screen-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-border);
}

.demo-screen-dot:first-child { background: #ef4444; }
.demo-screen-dot:nth-child(2) { background: #eab308; }
.demo-screen-dot:nth-child(3) { background: #22c55e; }

.demo-screen-title {
  margin-left: auto;
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  font-family: var(--font-mono);
}

.demo-screen-body {
  padding: var(--space-4);
  min-height: 240px;
}

/* --- Mock: Patient Intake --- */
.demo-mock-intake {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.demo-mock-logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-sm);
  color: var(--color-primary);
}

.demo-mock-heading {
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
}

.demo-mock-progress {
  height: 4px;
  background: var(--color-border);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.demo-mock-progress-bar {
  height: 100%;
  background: var(--color-primary);
  border-radius: var(--radius-full);
  transition: width 1s ease;
}

.demo-mock-field {
  height: 28px;
  background: var(--color-surface-elevated);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
}

.demo-mock-field--short {
  width: 60%;
}

.demo-mock-options {
  display: flex;
  gap: var(--space-2);
}

.demo-mock-option {
  padding: 4px 14px;
  font-size: 11px;
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  color: var(--color-text-tertiary);
}

.demo-mock-option--selected {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

.demo-mock-btn {
  padding: 6px 0;
  text-align: center;
  font-size: 11px;
  font-weight: 600;
  color: #fff;
  background: var(--color-primary);
  border-radius: var(--radius-sm);
}

/* --- Mock: Provider Dashboard --- */
.demo-mock-dashboard {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.demo-mock-nav {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding-bottom: var(--space-2);
  border-bottom: 1px solid var(--color-border);
}

.demo-mock-logo-sm {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 11px;
  color: var(--color-primary);
  margin-right: auto;
}

.demo-mock-tab {
  font-size: 10px;
  color: var(--color-text-tertiary);
  padding: 2px 0;
}

.demo-mock-tab--active {
  color: var(--color-primary);
  border-bottom: 2px solid var(--color-primary);
}

.demo-mock-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-2);
}

.demo-mock-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: var(--space-2);
  background: var(--color-surface-elevated);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
}

.demo-mock-stat-num {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-text-primary);
}

.demo-mock-stat--amber { color: #f59e0b; }
.demo-mock-stat--green { color: #22c55e; }
.demo-mock-stat--red { color: #ef4444; }

.demo-mock-stat-label {
  font-size: 9px;
  color: var(--color-text-tertiary);
  margin-top: 1px;
}

.demo-mock-cases {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.demo-mock-case {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: 6px var(--space-2);
  border-radius: var(--radius-sm);
  font-size: 11px;
}

.demo-mock-case--selected {
  background: var(--color-surface-elevated);
  border: 1px solid var(--color-primary);
}

.demo-mock-triage {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.demo-mock-triage--green { background: #22c55e; }
.demo-mock-triage--yellow { background: #eab308; }
.demo-mock-triage--red { background: #ef4444; }

.demo-mock-case-name {
  color: var(--color-text-primary);
  flex: 1;
}

.demo-mock-case-status {
  font-size: 9px;
  padding: 1px 6px;
  border-radius: var(--radius-full);
  background: rgba(34,197,94,0.15);
  color: #22c55e;
}

.demo-mock-case-status--pending {
  background: rgba(245,158,11,0.15);
  color: #f59e0b;
}

.demo-mock-case-status--flagged {
  background: rgba(239,68,68,0.15);
  color: #ef4444;
}

/* --- Mock: QI Dashboard --- */
.demo-mock-qi {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.demo-mock-qi-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-2);
}

.demo-mock-qi-stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: var(--space-2);
  background: var(--color-surface-elevated);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
}

.demo-mock-qi-num {
  font-family: var(--font-mono);
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--color-text-primary);
}

.demo-mock-qi--warn { color: #f59e0b; }
.demo-mock-qi--alert { color: #ef4444; }

.demo-mock-qi-label {
  font-size: 9px;
  color: var(--color-text-tertiary);
  margin-top: 2px;
}

.demo-mock-qi-bar-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.demo-mock-qi-bar-label {
  font-size: 10px;
  color: var(--color-text-secondary);
}

.demo-mock-qi-bar {
  height: 6px;
  background: var(--color-border);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.demo-mock-qi-bar-fill {
  height: 100%;
  background: var(--color-primary);
  border-radius: var(--radius-full);
}

/* --- Demo CTA area --- */
.demo-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-bottom: var(--space-6);
}

.demo-divider {
  color: var(--color-text-tertiary);
  font-size: var(--text-sm);
}

.demo-access-form {
  display: flex;
  gap: var(--space-2);
}

.demo-email-input {
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text-primary);
  font-size: var(--text-sm);
  font-family: var(--font-body);
  width: 240px;
  outline: none;
  transition: border-color var(--transition-interactive);
}

.demo-email-input:focus {
  border-color: var(--color-primary);
}

.demo-email-input::placeholder {
  color: var(--color-text-tertiary);
}

.cta-btn--primary {
  font-size: var(--text-base);
  padding: var(--space-3) var(--space-6);
}

.cta-btn--secondary {
  background: transparent;
  border: 1px solid var(--color-primary);
  color: var(--color-primary);
}

.cta-btn--secondary:hover {
  background: var(--color-primary);
  color: #fff;
}

/* Access confirmation toast */
.access-confirmation {
  display: none;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-3) var(--space-6);
  background: var(--color-primary);
  color: #fff;
  border-radius: var(--radius-full);
  font-size: var(--text-sm);
  font-weight: 500;
  animation: confirmSlideIn 400ms var(--ease-out) both;
}

.access-confirmation.is-visible {
  display: flex;
}

@keyframes confirmSlideIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.demo-note {
  text-align: center;
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  margin-top: var(--space-2);
}

.demo-try-btn {
  font-size: var(--text-base);
  padding: var(--space-3) var(--space-8);
}

@media (max-width: 640px) {
  .hero-ctas {
    flex-direction: column;
    align-items: stretch;
  }
  .hero-ctas .cta-btn {
    text-align: center;
    justify-content: center;
  }
  .demo-cta {
    flex-direction: column;
  }
  .demo-access-form {
    flex-direction: column;
    width: 100%;
  }
  .demo-email-input {
    width: 100%;
  }
}