/* =================================================================
   AxonCPT — Clinical Design System
   Colour palette: navy + slate + muted teal accent
   ================================================================= */

:root {
  /* Brand */
  --color-primary:        #1e3a5f;   /* deep navy */
  --color-primary-hover:  #14283f;
  --color-primary-soft:   #eef2f8;   /* very pale navy for subtle backgrounds */
  --color-accent:         #0d9488;   /* muted teal for data highlights */
  --color-accent-hover:   #0f766e;

  /* Neutrals */
  --color-text:           #0f172a;   /* slate-900 */
  --color-text-secondary: #475569;   /* slate-600 */
  --color-text-muted:     #64748b;   /* slate-500 */
  --color-surface:        #ffffff;
  --color-surface-alt:    #f8fafc;   /* slate-50 */
  --color-border:         #e2e8f0;   /* slate-200 */
  --color-border-strong:  #cbd5e1;   /* slate-300 */

  /* Status */
  --color-success:        #065f46;
  --color-warning:        #b45309;
  --color-danger:         #b91c1c;

  /* Spacing & radius (restrained) */
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 10px;

  /* Shadow (clinical: subtle, almost flat) */
  --shadow-xs: 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06), 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 4px 6px rgba(15, 23, 42, 0.05), 0 2px 4px rgba(15, 23, 42, 0.03);

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', 'Roboto',
               'Helvetica Neue', Arial, sans-serif;
}

/* -----------------------------------------------------------------
   Reset + base
----------------------------------------------------------------- */

*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font-sans);
  font-weight: 400;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-surface);
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.15s ease;
}

img, svg {
  display: block;
  max-width: 100%;
}

h1, h2, h3, h4 {
  color: var(--color-text);
  font-weight: 600;
  letter-spacing: -0.015em;
  line-height: 1.25;
}

.container {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Tiny utility classes */
.eyebrow {
  display: inline-block;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: 12px;
}

/* -----------------------------------------------------------------
   Navigation
----------------------------------------------------------------- */

.navbar {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 18px 0;
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: saturate(150%) blur(6px);
}

.nav-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 40px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-mark {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  background: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 15px;
  letter-spacing: 0.02em;
}

.logo h1 {
  color: var(--color-text);
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.nav-links {
  display: flex;
  gap: 28px;
  align-items: center;
}

.nav-links a {
  color: var(--color-text-secondary);
  font-weight: 500;
  font-size: 0.95rem;
}

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

/* -----------------------------------------------------------------
   Buttons
----------------------------------------------------------------- */

.btn-primary,
.btn-primary-large,
.btn-secondary,
.btn-outline {
  display: inline-block;
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius-md);
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--color-primary);
  color: #fff;
  padding: 9px 20px;
  font-size: 0.9rem;
}

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

.btn-primary-large {
  background: var(--color-primary);
  color: #fff;
  padding: 14px 32px;
  font-size: 1rem;
}

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

.btn-secondary {
  color: var(--color-text-secondary);
  padding: 9px 18px;
  font-size: 0.9rem;
  font-weight: 500;
}

.btn-secondary:hover {
  color: var(--color-primary);
}

.btn-outline {
  border-color: var(--color-border-strong);
  color: var(--color-text);
  padding: 12px 24px;
  font-size: 0.95rem;
  background: var(--color-surface);
}

.btn-outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* -----------------------------------------------------------------
   Hero
----------------------------------------------------------------- */

.hero {
  background: var(--color-surface-alt);
  border-bottom: 1px solid var(--color-border);
  padding: 96px 0 88px;
  text-align: left;
  position: relative;
  overflow: hidden;
}

/* Subtle clinical background — thin grid */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--color-border) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-border) 1px, transparent 1px);
  background-size: 64px 64px;
  background-position: center center;
  opacity: 0.35;
  mask-image: radial-gradient(ellipse at center, black 40%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 40%, transparent 75%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  max-width: 840px;
  margin: 0 auto;
  text-align: center;
}

.hero-title {
  font-size: clamp(2.2rem, 4.2vw, 3.25rem);
  font-weight: 700;
  letter-spacing: -0.025em;
  margin-bottom: 20px;
  color: var(--color-text);
}

.hero-subtitle {
  font-size: 1.125rem;
  color: var(--color-text-secondary);
  max-width: 640px;
  margin: 0 auto 36px;
  line-height: 1.55;
}

.hero-cta {
  margin-bottom: 56px;
}

.cta-note {
  margin-top: 12px;
  color: var(--color-text-muted);
  font-size: 0.875rem;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 48px;
  margin-top: 64px;
  padding-top: 40px;
  border-top: 1px solid var(--color-border);
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
}

.stat {
  text-align: center;
}

.stat-number {
  font-size: 1.85rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.015em;
  font-feature-settings: "tnum";
  margin-bottom: 4px;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 500;
}

/* -----------------------------------------------------------------
   Features
----------------------------------------------------------------- */

.features {
  padding: 96px 0;
  background: var(--color-surface);
}

.section-title {
  text-align: center;
  font-size: clamp(1.8rem, 3.5vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
  color: var(--color-text);
}

.section-subtitle {
  text-align: center;
  font-size: 1.05rem;
  color: var(--color-text-secondary);
  margin-bottom: 56px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--color-surface);
  padding: 32px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  transition: border-color 0.15s ease;
}

.feature-card:hover {
  border-color: var(--color-primary);
}

.feature-icon {
  display: inline-flex;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: var(--color-primary-soft);
  color: var(--color-primary);
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
}

.feature-icon svg {
  width: 22px;
  height: 22px;
  stroke-width: 1.75;
}

.feature-card h3 {
  font-size: 1.125rem;
  margin-bottom: 8px;
  color: var(--color-text);
  font-weight: 600;
}

.feature-card p {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* -----------------------------------------------------------------
   How it works
----------------------------------------------------------------- */

.how-it-works {
  padding: 96px 0;
  background: var(--color-surface-alt);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  max-width: 720px;
  margin: 0 auto;
  position: relative;
}

.step {
  display: flex;
  gap: 24px;
  align-items: flex-start;
  padding: 20px 0;
  border-bottom: 1px solid var(--color-border);
}

.step:last-child {
  border-bottom: none;
}

.step-number {
  background: var(--color-surface);
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.95rem;
  font-weight: 600;
  flex-shrink: 0;
  font-feature-settings: "tnum";
}

.step-content h3 {
  font-size: 1.05rem;
  margin-bottom: 4px;
  color: var(--color-text);
  font-weight: 600;
}

.step-content p {
  color: var(--color-text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* -----------------------------------------------------------------
   Pricing
----------------------------------------------------------------- */

.pricing {
  padding: 96px 0;
  background: var(--color-surface);
}

.pricing-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 48px;
}

.pricing-card {
  background: var(--color-surface);
  padding: 36px 28px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  position: relative;
  transition: border-color 0.15s ease;
  display: flex;
  flex-direction: column;
}

.pricing-card:hover {
  border-color: var(--color-border-strong);
}

.pricing-card.featured {
  border: 2px solid var(--color-primary);
  box-shadow: var(--shadow-md);
}

.badge {
  position: absolute;
  top: -11px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-primary);
  color: #fff;
  padding: 4px 14px;
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.pricing-card h3 {
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 16px;
  color: var(--color-text-muted);
  font-weight: 600;
}

.price {
  margin-bottom: 24px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--color-border);
}

.amount {
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.02em;
  font-feature-settings: "tnum";
}

.period {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  margin-left: 6px;
}

.features-list {
  list-style: none;
  margin-bottom: 28px;
  flex: 1;
}

.features-list li {
  padding: 8px 0;
  color: var(--color-text-secondary);
  font-size: 0.925rem;
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.features-list li::before {
  content: '';
  display: inline-block;
  width: 14px;
  height: 14px;
  margin-top: 4px;
  flex-shrink: 0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%230d9488' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E");
  background-size: contain;
  background-repeat: no-repeat;
}

.pricing-card .btn-outline,
.pricing-card .btn-primary {
  width: 100%;
  text-align: center;
  padding: 12px 16px;
}

/* -----------------------------------------------------------------
   Trust bar (new, clinical)
----------------------------------------------------------------- */

.trust-bar {
  padding: 40px 0;
  background: var(--color-surface-alt);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.trust-items {
  display: flex;
  justify-content: center;
  gap: 48px;
  flex-wrap: wrap;
  align-items: center;
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
}

.trust-item svg {
  width: 18px;
  height: 18px;
  color: var(--color-accent);
}

/* -----------------------------------------------------------------
   CTA
----------------------------------------------------------------- */

.cta-section {
  background: var(--color-primary);
  color: #fff;
  padding: 80px 0;
  text-align: center;
}

.cta-section h2 {
  font-size: clamp(1.75rem, 3.5vw, 2.25rem);
  font-weight: 700;
  margin-bottom: 14px;
  letter-spacing: -0.02em;
  color: #fff;
}

.cta-section p {
  font-size: 1.05rem;
  margin-bottom: 32px;
  color: rgba(255, 255, 255, 0.82);
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

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

.cta-section .btn-primary-large:hover {
  background: var(--color-surface-alt);
  color: var(--color-primary);
}

.cta-section .cta-note {
  color: rgba(255, 255, 255, 0.6);
}

/* -----------------------------------------------------------------
   Footer
----------------------------------------------------------------- */

.footer {
  background: var(--color-text);
  color: #94a3b8;
  padding: 56px 0 24px;
  font-size: 0.9rem;
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 40px;
}

.footer-col h4 {
  color: #fff;
  margin-bottom: 16px;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-weight: 600;
}

.footer-col p {
  line-height: 1.6;
  color: #cbd5e1;
  max-width: 280px;
}

.footer-col ul {
  list-style: none;
}

.footer-col ul li {
  margin-bottom: 10px;
}

.footer-col a {
  color: #94a3b8;
}

.footer-col a:hover {
  color: #fff;
}

.footer-bottom {
  text-align: center;
  padding-top: 24px;
  border-top: 1px solid #1e293b;
  color: #64748b;
  font-size: 0.825rem;
}

/* -----------------------------------------------------------------
   Responsive
----------------------------------------------------------------- */

@media (max-width: 900px) {
  .features-grid,
  .pricing-cards {
    grid-template-columns: 1fr;
  }
  .footer-content {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 640px) {
  .nav-links {
    gap: 14px;
  }
  .nav-links a:not(.btn-primary):not(.btn-secondary) {
    display: none;
  }
  .hero {
    padding: 64px 0;
  }
  .hero-stats {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .footer-content {
    grid-template-columns: 1fr;
  }
  .trust-items {
    gap: 20px;
  }
}