/* ============================================
   CheckIn Health — Design System
   ============================================ */

:root {
  /* Brand palette (from Canva + dashboard) */
  --navy: #0F2C47;
  --navy-deep: #0A1F33;
  --blue: #3F80B3;
  --blue-light: #5A9BCC;
  --teal: #0FA89F;
  --off-white: #F7F9FB;
  --white: #FFFFFF;
  --ink: #1A2332;
  --gray-900: #1A2332;
  --gray-700: #4A5568;
  --gray-500: #718096;
  --gray-300: #CBD5E0;
  --gray-200: #E2E8F0;
  --gray-100: #EDF2F7;

  /* Typography */
  --font-display: 'Fraunces', Georgia, serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

  /* Spacing rhythm */
  --container: 1200px;
  --container-narrow: 880px;

  /* Motion */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

/* ============================================
   Reset
   ============================================ */

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* ============================================
   Typography
   ============================================ */

.display-xl,
.display-lg,
.display-md,
.display-sm {
  font-family: var(--font-display);
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 1.05;
  color: var(--navy);
}

.display-xl { font-size: clamp(2.75rem, 6vw, 4.75rem); }
.display-lg { font-size: clamp(2.25rem, 4.5vw, 3.5rem); }
.display-md { font-size: clamp(1.75rem, 3vw, 2.5rem); }
.display-sm { font-size: clamp(1.5rem, 2.5vw, 2rem); line-height: 1.15; }

.eyebrow {
  font-family: var(--font-body);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 1rem;
}

.lead {
  font-size: clamp(1.125rem, 1.5vw, 1.3125rem);
  line-height: 1.55;
  color: var(--gray-700);
  font-weight: 400;
}

p {
  margin-bottom: 1.25rem;
}

p:last-child {
  margin-bottom: 0;
}

/* ============================================
   Layout
   ============================================ */

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 1.5rem;
}

.container-narrow {
  width: 100%;
  max-width: var(--container-narrow);
  margin: 0 auto;
  padding: 0 1.5rem;
}

section {
  padding: 6rem 0;
}

@media (max-width: 768px) {
  section { padding: 4rem 0; }
}

/* ============================================
   Navigation
   ============================================ */

.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--gray-200);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.125rem 1.5rem;
  max-width: var(--container);
  margin: 0 auto;
}

.nav-brand {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 500;
  color: var(--navy);
  letter-spacing: -0.01em;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-brand-mark {
  display: block;
  height: 32px;
  width: auto;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2.25rem;
}

.nav-link {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--gray-700);
  transition: color 0.2s var(--ease);
}

.nav-link:hover {
  color: var(--navy);
}

.nav-link.active {
  color: var(--navy);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  padding: 0.625rem 1.125rem;
  background: var(--navy);
  color: var(--white);
  border-radius: 8px;
  font-size: 0.9375rem;
  font-weight: 500;
  transition: background 0.2s var(--ease), transform 0.2s var(--ease);
}

.nav-cta:hover {
  background: var(--navy-deep);
  transform: translateY(-1px);
}

.nav-toggle {
  display: none;
  width: 32px;
  height: 32px;
  align-items: center;
  justify-content: center;
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--navy);
  position: relative;
}

.nav-toggle span::before,
.nav-toggle span::after {
  content: '';
  position: absolute;
  left: 0;
  width: 20px;
  height: 2px;
  background: var(--navy);
  transition: transform 0.2s var(--ease);
}

.nav-toggle span::before { top: -6px; }
.nav-toggle span::after { top: 6px; }

@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-toggle { display: flex; }
  .nav-links.open {
    display: flex;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 1.25rem;
    padding: 1.5rem;
    background: var(--white);
    border-bottom: 1px solid var(--gray-200);
  }
  .nav-cta { width: 100%; justify-content: center; }
}

/* ============================================
   Buttons
   ============================================ */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 1.5rem;
  border-radius: 8px;
  font-size: 0.9375rem;
  font-weight: 500;
  letter-spacing: -0.005em;
  transition: all 0.2s var(--ease);
  cursor: pointer;
  white-space: nowrap;
}

.btn-primary {
  background: var(--navy);
  color: var(--white);
}

.btn-primary:hover {
  background: var(--navy-deep);
  transform: translateY(-1px);
  box-shadow: 0 8px 24px -8px rgba(15, 44, 71, 0.4);
}

.btn-secondary {
  background: transparent;
  color: var(--navy);
  border: 1px solid var(--gray-300);
}

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

.btn-ghost {
  color: var(--navy);
  padding: 0.5rem 0;
}

.btn-ghost:hover {
  color: var(--blue);
}

.btn-arrow {
  transition: transform 0.2s var(--ease);
}

.btn:hover .btn-arrow {
  transform: translateX(3px);
}

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

.hero {
  position: relative;
  padding: 5rem 0 6rem;
  background: linear-gradient(180deg, #FAFBFD 0%, var(--white) 100%);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -200px;
  right: -200px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(63, 128, 179, 0.08) 0%, transparent 60%);
  pointer-events: none;
}

.hero-inner {
  max-width: 920px;
  position: relative;
}

.hero h1 {
  margin-bottom: 1.75rem;
}

.hero .lead {
  margin-bottom: 2.5rem;
  max-width: 640px;
}

.hero-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-bottom: 4rem;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 2.5rem;
  padding-top: 2.5rem;
  border-top: 1px solid var(--gray-200);
}

.hero-meta-item {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.hero-meta-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gray-500);
}

.hero-meta-value {
  font-family: var(--font-display);
  font-size: 1.125rem;
  color: var(--navy);
}

/* ============================================
   Sections
   ============================================ */

.section-light {
  background: var(--off-white);
}

.section-navy {
  background: var(--navy);
  color: var(--off-white);
}

.section-navy h1,
.section-navy h2,
.section-navy h3,
.section-navy .display-xl,
.section-navy .display-lg,
.section-navy .display-md,
.section-navy .display-sm {
  color: var(--white);
}

.section-navy .eyebrow {
  color: var(--blue-light);
}

.section-navy .lead {
  color: rgba(247, 249, 251, 0.78);
}

.section-header {
  max-width: 720px;
  margin-bottom: 4rem;
}

.section-header.center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.section-header h2 {
  margin-bottom: 1.25rem;
}

/* ============================================
   Cards / Features
   ============================================ */

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

@media (max-width: 900px) {
  .feature-grid { grid-template-columns: 1fr; }
}

.feature-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 16px;
  padding: 2rem;
  transition: border-color 0.3s var(--ease), transform 0.3s var(--ease);
}

.feature-card:hover {
  border-color: var(--blue);
  transform: translateY(-2px);
}

.section-light .feature-card {
  background: var(--white);
}

.feature-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: var(--off-white);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--blue);
  margin-bottom: 1.5rem;
}

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

.feature-card h3 {
  font-family: var(--font-display);
  font-size: 1.375rem;
  color: var(--navy);
  margin-bottom: 0.75rem;
  letter-spacing: -0.01em;
}

.feature-card p {
  color: var(--gray-700);
  font-size: 0.9375rem;
  line-height: 1.6;
  margin: 0;
}

/* ============================================
   Numbered list
   ============================================ */

.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2.5rem;
  counter-reset: step;
}

@media (max-width: 900px) {
  .steps { grid-template-columns: 1fr; gap: 2rem; }
}

.step {
  position: relative;
  padding-top: 2.5rem;
  border-top: 2px solid var(--blue);
}

.step::before {
  counter-increment: step;
  content: counter(step, decimal-leading-zero);
  position: absolute;
  top: -1.25rem;
  left: 0;
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 500;
  color: var(--blue);
  background: var(--white);
  padding-right: 1rem;
}

.section-light .step::before {
  background: var(--off-white);
}

.section-navy .step {
  border-top-color: var(--blue-light);
}

.section-navy .step::before {
  background: var(--navy);
  color: var(--blue-light);
}

.step h3 {
  font-family: var(--font-display);
  font-size: 1.375rem;
  margin-bottom: 0.75rem;
  letter-spacing: -0.01em;
  color: var(--navy);
}

.section-navy .step h3 {
  color: var(--white);
}

.step p {
  color: var(--gray-700);
  font-size: 0.9375rem;
  line-height: 1.6;
  margin: 0;
}

.section-navy .step p {
  color: rgba(247, 249, 251, 0.75);
}

/* ============================================
   Quote / pull
   ============================================ */

.pull-quote {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  line-height: 1.3;
  letter-spacing: -0.015em;
  color: var(--navy);
  max-width: 780px;
  margin: 0 auto;
  text-align: center;
}

.pull-quote::before {
  content: '';
  display: block;
  width: 40px;
  height: 2px;
  background: var(--teal);
  margin: 0 auto 2rem;
}

/* ============================================
   Two-column
   ============================================ */

.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

@media (max-width: 900px) {
  .two-col { grid-template-columns: 1fr; gap: 2.5rem; }
}

.two-col-flip {
  direction: rtl;
}

.two-col-flip > * {
  direction: ltr;
}

@media (max-width: 900px) {
  .two-col-flip { direction: ltr; }
}

/* ============================================
   Audience cards
   ============================================ */

.audience-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

@media (max-width: 900px) {
  .audience-grid { grid-template-columns: 1fr; }
}

.audience-card {
  padding: 2.5rem 2rem;
  background: var(--white);
  border-radius: 16px;
  border: 1px solid var(--gray-200);
}

.audience-tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 1rem;
}

.audience-card h3 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: var(--navy);
  margin-bottom: 1rem;
  letter-spacing: -0.01em;
}

.audience-card p {
  color: var(--gray-700);
  font-size: 0.9375rem;
  line-height: 1.6;
  margin: 0;
}

/* ============================================
   CTA band
   ============================================ */

.cta-band {
  background: var(--navy);
  color: var(--white);
  padding: 5rem 0;
  position: relative;
  overflow: hidden;
}

.cta-band::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 50%;
  height: 100%;
  background: radial-gradient(circle at top right, rgba(63, 128, 179, 0.25) 0%, transparent 60%);
  pointer-events: none;
}

.cta-band-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 3rem;
  align-items: center;
}

@media (max-width: 900px) {
  .cta-band-inner { grid-template-columns: 1fr; gap: 2rem; }
}

.cta-band h2 {
  color: var(--white);
  margin-bottom: 1rem;
}

.cta-band p {
  color: rgba(247, 249, 251, 0.78);
  margin: 0;
}

.cta-band-actions {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

@media (max-width: 900px) {
  .cta-band-actions { justify-content: flex-start; }
}

.btn-on-navy {
  background: var(--white);
  color: var(--navy);
}

.btn-on-navy:hover {
  background: var(--off-white);
  transform: translateY(-1px);
}

.btn-on-navy-outline {
  background: transparent;
  color: var(--white);
  border: 1px solid rgba(247, 249, 251, 0.3);
}

.btn-on-navy-outline:hover {
  border-color: var(--white);
  background: rgba(255, 255, 255, 0.05);
}

/* ============================================
   Footer
   ============================================ */

.footer {
  background: var(--navy-deep);
  color: rgba(247, 249, 251, 0.7);
  padding: 4rem 0 2rem;
}

.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

@media (max-width: 900px) {
  .footer-inner { grid-template-columns: 1fr 1fr; gap: 2rem; }
}

@media (max-width: 600px) {
  .footer-inner { grid-template-columns: 1fr; }
}

.footer-brand {
  font-family: var(--font-display);
  font-size: 1.5rem;
  color: var(--white);
  margin-bottom: 1rem;
}

.footer-tag {
  font-size: 0.875rem;
  line-height: 1.6;
  max-width: 320px;
}

.footer-col h4 {
  color: var(--white);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 1.25rem;
}

.footer-col a {
  display: block;
  font-size: 0.9375rem;
  color: rgba(247, 249, 251, 0.7);
  margin-bottom: 0.625rem;
  transition: color 0.2s var(--ease);
}

.footer-col a:hover {
  color: var(--white);
}

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid rgba(247, 249, 251, 0.1);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.8125rem;
  color: rgba(247, 249, 251, 0.5);
}

.footer-bottom-flag {
  color: rgba(247, 249, 251, 0.7);
}

/* ============================================
   Page header (interior pages)
   ============================================ */

.page-header {
  padding: 5rem 0 4rem;
  background: linear-gradient(180deg, #FAFBFD 0%, var(--white) 100%);
  border-bottom: 1px solid var(--gray-200);
}

.page-header-inner {
  max-width: 880px;
}

.page-header h1 {
  margin-bottom: 1.25rem;
}

/* ============================================
   Founder section
   ============================================ */

.founder {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 4rem;
  align-items: start;
}

@media (max-width: 900px) {
  .founder { grid-template-columns: 1fr; gap: 2rem; }
}

.founder-photo {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: 12px;
  filter: grayscale(0%);
}

.founder-meta {
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--gray-200);
}

.founder-name {
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--navy);
  margin-bottom: 0.25rem;
}

.founder-title {
  font-size: 0.875rem;
  color: var(--gray-500);
}

.founder-body {
  font-size: 1.0625rem;
  line-height: 1.7;
  color: var(--gray-700);
}

.founder-body p {
  margin-bottom: 1.5rem;
}

.founder-body p:first-child::first-letter {
  font-family: var(--font-display);
  font-size: 3.5rem;
  font-weight: 500;
  float: left;
  line-height: 1;
  margin: 0.1rem 0.75rem 0 0;
  color: var(--navy);
}

/* ============================================
   Trust / security
   ============================================ */

.trust-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

@media (max-width: 700px) {
  .trust-grid { grid-template-columns: 1fr; }
}

.trust-card {
  padding: 2rem;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: 12px;
  border-left: 3px solid var(--teal);
}

.trust-card h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--navy);
  margin-bottom: 0.75rem;
  letter-spacing: -0.01em;
}

.trust-card p {
  color: var(--gray-700);
  font-size: 0.9375rem;
  line-height: 1.6;
  margin: 0;
}

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

.trust-list li {
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--gray-200);
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 2rem;
  align-items: baseline;
}

@media (max-width: 700px) {
  .trust-list li { grid-template-columns: 1fr; gap: 0.5rem; }
}

.trust-list li:last-child {
  border-bottom: none;
}

.trust-list dt {
  font-family: var(--font-display);
  font-size: 1.0625rem;
  color: var(--navy);
}

.trust-list dd {
  color: var(--gray-700);
  font-size: 0.9375rem;
  line-height: 1.55;
}

/* ============================================
   Stat block (large numbers)
   ============================================ */

.stat-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  padding: 3rem 0;
  border-top: 1px solid var(--gray-200);
  border-bottom: 1px solid var(--gray-200);
}

@media (max-width: 700px) {
  .stat-row { grid-template-columns: 1fr; gap: 1.5rem; }
}

.stat {
  text-align: left;
}

.stat-num {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  line-height: 1;
  color: var(--navy);
  margin-bottom: 0.5rem;
  letter-spacing: -0.02em;
}

.stat-label {
  font-size: 0.9375rem;
  color: var(--gray-700);
  line-height: 1.5;
}

/* ============================================
   Subtle reveal on load
   ============================================ */

@media (prefers-reduced-motion: no-preference) {
  .reveal {
    opacity: 0;
    transform: translateY(12px);
    animation: reveal 0.8s var(--ease) forwards;
  }
  .reveal-1 { animation-delay: 0.05s; }
  .reveal-2 { animation-delay: 0.15s; }
  .reveal-3 { animation-delay: 0.25s; }
  .reveal-4 { animation-delay: 0.35s; }
}

@keyframes reveal {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============================================
   Pilot signal (replaces logos)
   ============================================ */

.pilot-band {
  padding: 2.5rem 0;
  background: var(--off-white);
  border-top: 1px solid var(--gray-200);
  border-bottom: 1px solid var(--gray-200);
}

.pilot-band-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  text-align: center;
}

.pilot-label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--gray-500);
}

.pilot-text {
  font-family: var(--font-display);
  font-size: clamp(1.0625rem, 1.6vw, 1.25rem);
  color: var(--navy);
  line-height: 1.4;
  max-width: 720px;
}

/* ============================================
   Form (contact)
   ============================================ */

.form {
  display: grid;
  gap: 1.25rem;
  max-width: 560px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

@media (max-width: 600px) {
  .form-row { grid-template-columns: 1fr; }
}

.form-field label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--navy);
  margin-bottom: 0.5rem;
  letter-spacing: 0.02em;
}

.form-field input,
.form-field textarea,
.form-field select {
  width: 100%;
  padding: 0.875rem 1rem;
  border: 1px solid var(--gray-300);
  border-radius: 8px;
  font: inherit;
  font-size: 0.9375rem;
  color: var(--ink);
  background: var(--white);
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.form-field input:focus,
.form-field textarea:focus,
.form-field select:focus {
  outline: none;
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(63, 128, 179, 0.15);
}

.form-field textarea {
  min-height: 130px;
  resize: vertical;
  font-family: var(--font-body);
}

.form-help {
  font-size: 0.8125rem;
  color: var(--gray-500);
  margin-top: 0.4rem;
}

/* ============================================
   Anchor offset for sticky nav
   ============================================ */

[id] {
  scroll-margin-top: 100px;
}