/* style.css — Retinex Design Tokens + Components */
/* Premium dark-only healthcare SaaS aesthetic */

/* ═══════════════════════════════════════════
   DESIGN TOKENS
   Art direction: Premium dark-mode healthcare SaaS.
   Palette: Deep dark bg + blue accent.
   Aesthetic: Stripe / Linear, adapted for healthcare.
   ═══════════════════════════════════════════ */

:root {
  /* Type Scale */
  --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);

  /* Spacing (4px base) */
  --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 */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Content widths */
  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;

  /* Font families */
  --font-display: 'General Sans', 'Helvetica Neue', sans-serif;
  --font-body: 'General Sans', 'Helvetica Neue', sans-serif;
  --font-mono: 'JetBrains Mono', 'Consolas', monospace;
}

/* ═══════════════════════════════════════════
   PERMANENT DARK MODE — Single color system
   Background: #0B0B0F  Panels: #121218
   Borders: #1F1F2A  Text: #E6EAF2 / #A0A6B2
   Accent blue: #3B82F6  Success: #10B981  Alert: #EF4444
   ═══════════════════════════════════════════ */

:root, [data-theme="dark"] {
  --color-bg:             #0B0B0F;
  --color-surface:        #121218;
  --color-surface-2:      #16161E;
  --color-surface-offset: #1A1A24;
  --color-divider:        #1F1F2A;
  --color-border:         #2A2A38;

  --color-text:           #E6EAF2;
  --color-text-muted:     #A0A6B2;
  --color-text-faint:     #5C6070;
  --color-text-inverse:   #0B0B0F;

  /* Blue Primary — accent only (B cone) */
  --color-primary:        #3B82F6;
  --color-primary-hover:  #2563EB;
  --color-primary-active: #1D4ED8;
  --color-primary-light:  rgba(59, 130, 246, 0.1);
  --color-primary-muted:  rgba(59, 130, 246, 0.2);

  /* Red accent (L cone) — used sparingly */
  --color-red:            #EF4444;
  --color-red-light:      rgba(239, 68, 68, 0.1);
  --color-red-muted:      rgba(239, 68, 68, 0.2);

  /* Green accent (M cone) — used sparingly */
  --color-green:          #10B981;
  --color-green-light:    rgba(16, 185, 129, 0.1);
  --color-green-muted:    rgba(16, 185, 129, 0.2);

  /* Functional */
  --color-success:        #10B981;
  --color-warning:        #F59E0B;
  --color-error:          #EF4444;

  /* Shadows — deep dark */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.5);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.6);
  --shadow-xl: 0 24px 48px rgba(0, 0, 0, 0.7);
}


/* ═══════════════════════════════════════════
   LAYOUT
   ═══════════════════════════════════════════ */

.container {
  width: 100%;
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

.container--narrow {
  max-width: var(--content-default);
}

.section {
  padding-block: clamp(var(--space-12), 8vw, var(--space-24));
}


/* ═══════════════════════════════════════════
   HEADER / NAV
   ═══════════════════════════════════════════ */

.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(11, 11, 15, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-divider);
  transition: box-shadow 0.3s ease;
}

.header--scrolled {
  box-shadow: var(--shadow-sm);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  max-width: var(--content-wide);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

.header__logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-text);
}

.header__logo-img {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  object-fit: contain;
}

.header__logo-text {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-lg);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.header__nav {
  display: flex;
  align-items: center;
  gap: var(--space-8);
}

.header__nav-link {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  letter-spacing: 0.01em;
  position: relative;
  transition: color var(--transition-interactive);
}

.header__nav-link:hover,
.header__nav-link--active {
  color: var(--color-text);
}

.header__nav-link--active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-primary);
  border-radius: 1px;
}

.header__actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

/* Mobile menu */
.mobile-menu-btn {
  display: none;
  width: 36px;
  height: 36px;
  align-items: center;
  justify-content: center;
  color: var(--color-text);
}

.mobile-nav {
  display: none;
  position: fixed;
  inset: 64px 0 0 0;
  background: var(--color-bg);
  z-index: 99;
  padding: var(--space-8) var(--space-6);
  flex-direction: column;
  gap: var(--space-6);
}

.mobile-nav--open {
  display: flex;
}

.mobile-nav__link {
  font-size: var(--text-lg);
  font-weight: 500;
  color: var(--color-text);
  text-decoration: none;
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-divider);
}


/* ═══════════════════════════════════════════
   HERO
   ═══════════════════════════════════════════ */

.hero {
  position: relative;
  min-height: 80vh;
  display: flex;
  align-items: center;
  background: var(--color-bg);
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  opacity: 0.3;
  background:
    radial-gradient(ellipse 60% 50% at 75% 30%, rgba(239, 68, 68, 0.2), transparent),
    radial-gradient(ellipse 50% 45% at 20% 70%, rgba(16, 185, 129, 0.18), transparent),
    radial-gradient(ellipse 70% 55% at 50% 50%, rgba(59, 130, 246, 0.15), transparent);
}

.hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 60px 60px;
}

.hero__content {
  position: relative;
  z-index: 2;
  max-width: 800px;
  padding-block: var(--space-20);
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary);
  background: var(--color-primary-light);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  border: 1px solid var(--color-primary-muted);
  margin-bottom: var(--space-6);
}

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

.hero__subtitle {
  font-size: var(--text-xl);
  line-height: 1.5;
  color: var(--color-text-muted);
  letter-spacing: 0.01em;
  max-width: 560px;
  margin-bottom: var(--space-8);
}

.hero__actions {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
}


/* ═══════════════════════════════════════════
   BUTTONS
   ═══════════════════════════════════════════ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  text-decoration: none;
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--transition-interactive);
}

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

.btn--primary:hover {
  background: var(--color-primary-hover);
  box-shadow: 0 0 20px rgba(59, 130, 246, 0.3);
}

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

.btn--outline:hover {
  background: var(--color-surface);
  border-color: var(--color-text-faint);
}

.btn--lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-base);
}


/* ═══════════════════════════════════════════
   FEATURES / CARDS
   ═══════════════════════════════════════════ */

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-6);
}

.feature-card {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  transition: border-color var(--transition-interactive), box-shadow var(--transition-interactive);
}

.feature-card:hover {
  border-color: var(--color-border);
  box-shadow: var(--shadow-md);
}

.feature-card__icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary-light);
  color: var(--color-primary);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-5);
}

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

.feature-card__text {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}


/* ═══════════════════════════════════════════
   SECTION HEADINGS
   ═══════════════════════════════════════════ */

.section-header {
  text-align: center;
  max-width: 640px;
  margin-inline: auto;
  margin-bottom: var(--space-12);
}

.section-label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}

.section-title {
  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-subtitle {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.6;
}


/* ═══════════════════════════════════════════
   STATS ROW
   ═══════════════════════════════════════════ */

.stats-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-8);
  padding-block: var(--space-12);
  border-top: 1px solid var(--color-divider);
  border-bottom: 1px solid var(--color-divider);
}

.stat {
  text-align: center;
}

.stat__number {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
}

.stat__label {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-1);
}


/* ═══════════════════════════════════════════
   COMPLIANCE / DISCLOSURE TABLE
   ═══════════════════════════════════════════ */

.disclosure-table {
  width: 100%;
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.disclosure-table th,
.disclosure-table td {
  padding: var(--space-4) var(--space-5);
  text-align: left;
  font-size: var(--text-sm);
  border-bottom: 1px solid var(--color-divider);
}

.disclosure-table th {
  background: var(--color-surface-2);
  font-weight: 600;
  color: var(--color-text);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.disclosure-table td {
  color: var(--color-text-muted);
}

.disclosure-table tr:last-child td {
  border-bottom: none;
}

.disclosure-table td:first-child {
  font-weight: 500;
  color: var(--color-text);
}

.disclosure-callout {
  background: var(--color-primary-light);
  border: 1px solid var(--color-primary-muted);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  margin-block: var(--space-6);
}

.disclosure-callout__title {
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: var(--space-2);
}

.disclosure-callout__text {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}


/* ═══════════════════════════════════════════
   CONTACT FORM
   ═══════════════════════════════════════════ */

.form-group {
  margin-bottom: var(--space-5);
}

.form-label {
  display: block;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.form-input,
.form-textarea {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--text-base);
  color: var(--color-text);
  font-family: var(--font-body);
  transition: border-color var(--transition-interactive), box-shadow var(--transition-interactive);
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-light);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--color-text-faint);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

/* Select dropdown dark styling */
.form-input option {
  background: var(--color-surface);
  color: var(--color-text);
}

/* Contact grid */
.contact-grid {
  grid-template-columns: 1fr 1fr;
}


/* ═══════════════════════════════════════════
   FOOTER
   ═══════════════════════════════════════════ */

.footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-divider);
  padding-block: var(--space-16) var(--space-8);
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-12);
  margin-bottom: var(--space-12);
}

.footer__brand-text {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
  max-width: 320px;
  margin-top: var(--space-4);
}

.footer__heading {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-faint);
  margin-bottom: var(--space-4);
}

.footer__link {
  display: block;
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  padding-block: var(--space-1);
  transition: color var(--transition-interactive);
}

.footer__link:hover {
  color: var(--color-text);
}

.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-divider);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

.footer__bottom a {
  color: var(--color-text-faint);
  text-decoration: none;
  transition: color var(--transition-interactive);
}

.footer__bottom a:hover {
  color: var(--color-text-muted);
}

.footer__logo-img {
  width: 32px;
  height: 32px;
  border-radius: var(--radius-full);
  object-fit: contain;
}


/* ═══════════════════════════════════════════
   CTA BANNER — Subtle dark variant, no large colored bg
   ═══════════════════════════════════════════ */

.cta-banner {
  background: var(--color-surface);
  border-top: 1px solid var(--color-divider);
  border-bottom: 1px solid var(--color-divider);
  text-align: center;
  padding-block: var(--space-16);
}

.cta-banner__title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

.cta-banner__text {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 480px;
  margin-inline: auto;
  margin-bottom: var(--space-8);
}


/* ═══════════════════════════════════════════
   COMPLIANCE PAGE SPECIFICS
   ═══════════════════════════════════════════ */

.compliance-section {
  margin-bottom: var(--space-12);
}

.compliance-section__title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-4);
  letter-spacing: -0.01em;
}

.compliance-section__text {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: var(--space-6);
}

.compliance-disclaimer {
  background: var(--color-surface-2);
  border-left: 4px solid var(--color-primary);
  padding: var(--space-6);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  margin-block: var(--space-8);
}

.compliance-disclaimer p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
}


/* ═══════════════════════════════════════════
   PRODUCT PAGE
   ═══════════════════════════════════════════ */

.product-hero {
  background: var(--color-bg);
  padding-block: var(--space-20);
  position: relative;
  overflow: hidden;
}

.product-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 45% at 80% 25%, rgba(239, 68, 68, 0.12), transparent),
    radial-gradient(ellipse 50% 40% at 15% 65%, rgba(16, 185, 129, 0.1), transparent),
    radial-gradient(ellipse 65% 50% at 50% 45%, rgba(59, 130, 246, 0.1), transparent);
}

.product-hero__content {
  position: relative;
  z-index: 2;
  text-align: center;
}

.product-hero__title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: #FFFFFF;
  letter-spacing: -0.03em;
  margin-bottom: var(--space-4);
}

.product-hero__subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-muted);
  max-width: 560px;
  margin-inline: auto;
}

/* Feature detail sections (alternating) */
.feature-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
}

.feature-detail--reverse {
  direction: rtl;
}

.feature-detail--reverse > * {
  direction: ltr;
}

.feature-detail__visual {
  background: var(--color-surface-2);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-xl);
  aspect-ratio: 4/3;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.feature-detail__label {
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}

.feature-detail__title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.01em;
  margin-bottom: var(--space-4);
}

.feature-detail__text {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: var(--space-6);
}

.feature-list {
  list-style: none;
  padding: 0;
}

.feature-list li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-3);
}

.feature-list li svg {
  flex-shrink: 0;
  margin-top: 2px;
  color: var(--color-primary);
}


/* ═══════════════════════════════════════════
   TRIADIC CONE COLORS (R/G/B accent utility)
   ═══════════════════════════════════════════ */

.icon--red {
  background: var(--color-red-light);
  color: var(--color-red);
}

.icon--green {
  background: var(--color-green-light);
  color: var(--color-green);
}

.icon--blue {
  background: var(--color-primary-light);
  color: var(--color-primary);
}

/* Section label color variants */
.section-label--red { color: var(--color-red); }
.section-label--green { color: var(--color-green); }

/* Stat number color variants */
.stat__number--red { color: var(--color-red); }
.stat__number--green { color: var(--color-green); }


/* ═══════════════════════════════════════════
   SCROLL REVEAL
   ═══════════════════════════════════════════ */

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal--visible {
  opacity: 1;
  transform: translateY(0);
}


/* ═══════════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════════ */

@media (max-width: 768px) {
  .header__nav {
    display: none;
  }

  .contact-grid {
    grid-template-columns: 1fr;
  }

  .mobile-menu-btn {
    display: flex;
  }

  .hero__title {
    font-size: var(--text-2xl);
  }

  .footer__grid {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .feature-detail {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .feature-detail--reverse {
    direction: ltr;
  }

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

  .features-grid {
    grid-template-columns: 1fr;
  }

  .section-title {
    font-size: var(--text-xl);
  }
}

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

  .hero__actions {
    flex-direction: column;
  }

  .hero__actions .btn {
    width: 100%;
  }
}