:root {
  --color-primary: #007AFF;
  --color-primary-dark: #0051D5;
  --color-secondary: #FF9500;
  --color-secondary-dark: #E08400;
  --color-accent: #5856D6;
  --color-accent-light: #AF52DE;
  --color-text-dark: #1D1D1F;
  --color-text-light: #6E6E73;
  --color-bg: #FFFFFF;
  --color-bg-alt: #F5F5F7;
  --color-border: #D2D2D7;
  --color-success: #34C759;
  --color-error: #FF3B30;
  --color-neutral-50: #FAFAFA;
  --color-neutral-100: #F5F5F7;
  --color-neutral-200: #E8E8ED;
  --color-neutral-300: #D2D2D7;
  --color-neutral-700: #86868B;
  --color-neutral-900: #1D1D1F;
  --font-primary: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
  --font-secondary: -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
  --font-weight-light: 300;
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  --fs-base: 17px;
  --fs-sm: 15px;
  --fs-md: 17px;
  --fs-lg: 19px;
  --fs-xl: 21px;
  --lh-base: 1.47;
  --lh-heading: 1.1;
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;
  --space-4xl: 80px;
  --container-w: 1280px;
  --header-h: 64px;
  --logo-w: 180px;
  --logo-h: 48px;
  --z-nav: 1000;
  --z-modal: 1100;
  --z-tooltip: 1050;
  --transition: all 0.4s cubic-bezier(0.25, 0.1, 0.25, 1);
  --transition-fast: all 0.25s cubic-bezier(0.25, 0.1, 0.25, 1);
  --transition-nav: max-height 350ms cubic-bezier(0.25, 0.1, 0.25, 1), opacity 350ms ease;
  --border-radius-sm: 4px;
  --border-radius-md: 8px;
  --border-radius-lg: 12px;
  --shadow-subtle: 0 2px 8px rgba(0, 0, 0, 0.04);
  --shadow-standard: 0 4px 16px rgba(0, 0, 0, 0.08);
  --shadow-elevated: 0 12px 32px rgba(0, 0, 0, 0.12);
  --nav-h: var(--header-h);
  --bp-mobile: 768px;
  --bp-tablet: 1024px;
}

/* HEADER */
.dr-header {
  position: sticky;
  top: 0;
  z-index: var(--z-nav);
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-neutral-200);
}

.dr-header-inner {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 var(--space-md);
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-primary);
}

.dr-header-brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.dr-header-logo {
  font-weight: var(--font-weight-semibold);
  font-size: var(--fs-md);
  color: var(--color-text-dark);
  white-space: nowrap;
}

.dr-header-logo-sub {
  font-size: var(--fs-sm);
  color: var(--color-text-light);
}

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

.dr-nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  list-style: none;
  margin: 0;
  padding: 0;
}

.dr-nav-link {
  text-decoration: none;
  font-family: var(--font-secondary);
  font-size: var(--fs-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-dark);
  padding-bottom: 2px;
  border-bottom: 2px solid transparent;
  transition: var(--transition-fast);
}

.dr-nav-link:hover,
.dr-nav-link:focus-visible {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

/* BURGER */
.dr-burger {
  display: none;
  width: 32px;
  height: 32px;
  padding: 0;
  border: none;
  background: transparent;
  cursor: pointer;
  position: relative;
}

.dr-burger-box {
  position: relative;
  width: 22px;
  height: 16px;
  margin: 0 auto;
}

.dr-burger-line {
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--color-text-dark);
  border-radius: 2px;
  transition: var(--transition-fast);
}

.dr-burger-line:nth-child(1) { top: 0; }
.dr-burger-line:nth-child(2) { top: 7px; }
.dr-burger-line:nth-child(3) { top: 14px; }

.dr-header.dr-open .dr-burger-line:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.dr-header.dr-open .dr-burger-line:nth-child(2) {
  opacity: 0;
}

.dr-header.dr-open .dr-burger-line:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* MOBILE MENU */
.dr-mobile-menu {
  display: none;
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-neutral-200);
  box-shadow: var(--shadow-subtle);
}

.dr-header.dr-open + .dr-mobile-menu {
  display: block;
}

.dr-mobile-menu-inner {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: var(--space-md);
  font-family: var(--font-secondary);
}

.dr-mobile-nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.dr-mobile-nav-link {
  display: block;
  padding: var(--space-sm) 0;
  text-decoration: none;
  color: var(--color-text-dark);
  font-size: var(--fs-md);
  font-weight: var(--font-weight-regular);
  border-bottom: 1px solid var(--color-neutral-200);
}

.dr-mobile-nav-link:last-child {
  border-bottom: none;
}

.dr-mobile-nav-link:hover,
.dr-mobile-nav-link:focus-visible {
  color: var(--color-primary);
}

/* RESPONSIVE NAVIGATION */
@media (max-width: 767px) {
  .dr-nav {
    display: none;
  }

  .dr-burger {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }
}

@media (min-width: 768px) {
  .dr-nav {
    display: flex;
  }

  .dr-burger,
  .dr-mobile-menu {
    display: none;
  }
}

/* FOOTER */
.dr-footer {
  background-color: var(--color-neutral-50);
  border-top: 1px solid var(--color-neutral-200);
  font-family: var(--font-secondary);
  color: var(--color-text-dark);
}

.dr-footer-inner {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: var(--space-2xl) var(--space-md) var(--space-xl);
}

.dr-footer-top {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(0, 1.2fr) minmax(0, 1.2fr) minmax(0, 1.6fr);
  gap: var(--space-xl);
  margin-bottom: var(--space-xl);
}

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

.dr-footer-logo {
  font-family: var(--font-primary);
  font-weight: var(--font-weight-semibold);
  font-size: var(--fs-lg);
  color: var(--color-text-dark);
}

.dr-footer-tagline {
  margin: 0;
  font-size: var(--fs-sm);
  color: var(--color-text-light);
}

.dr-footer-heading {
  margin: 0 0 var(--space-sm);
  font-size: var(--fs-sm);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: var(--font-weight-semibold);
  color: var(--color-neutral-700);
}

.dr-footer-nav-list,
.dr-footer-legal-list,
.dr-footer-contact-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.dr-footer-nav-item,
.dr-footer-legal-item,
.dr-footer-contact-item {
  margin-bottom: var(--space-xs);
}

.dr-footer-link {
  text-decoration: none;
  font-size: var(--fs-sm);
  color: var(--color-text-dark);
  transition: var(--transition-fast);
}

.dr-footer-link:hover,
.dr-footer-link:focus-visible {
  color: var(--color-primary);
}

.dr-footer-contact-label {
  display: block;
  font-size: var(--fs-xs);
  font-weight: var(--font-weight-medium);
  color: var(--color-neutral-700);
}

.dr-footer-contact-value {
  font-size: var(--fs-sm);
}

.dr-footer-bottom {
  border-top: 1px solid var(--color-neutral-200);
  padding-top: var(--space-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.dr-footer-disclaimer {
  margin: 0;
  font-size: var(--fs-sm);
  color: var(--color-text-light);
  line-height: var(--lh-base);
}

.dr-footer-meta {
  margin: 0;
  font-size: var(--fs-sm);
  color: var(--color-neutral-700);
}

/* Utility for year injection if JS is used */
.dr-year {
  white-space: nowrap;
}

@media (max-width: 767px) {
  .dr-footer-inner {
    padding: var(--space-2xl) var(--space-md) var(--space-lg);
  }

  .dr-footer-top {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }
}

@media (min-width: 768px) and (max-width: 1023px) {
  .dr-footer-top {
    grid-template-columns: minmax(0, 2fr) minmax(0, 1.2fr) minmax(0, 1.6fr);
  }

  .dr-footer-nav {
    order: 2;
  }

  .dr-footer-legal {
    order: 3;
  }

  .dr-footer-contact {
    order: 4;
  }
}

@media (min-width: 1024px) {
  .dr-footer-inner {
    padding-top: var(--space-3xl);
    padding-bottom: var(--space-2xl);
  }
}