:root {
  --bts-color-primary: #ff6600;
  --bts-color-dark: #141414;
  --bts-color-accent: #40b840;
  --bts-color-bg: #ffffff;
  --bts-color-text: #141414;
  --bts-color-muted: #6b6b6b;
  --bts-color-border: #e5e5e5;
  --bts-font-body: system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --bts-font-heading: 'Helvetica Neue', Helvetica, Arial, system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --bts-radius: 0.375rem;
}

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

body {
  font-family: var(--bts-font-body);
  background-color: var(--bts-color-bg);
  color: var(--bts-color-text);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

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

/* Header Outer Structure */
.bts-header {
  background-color: var(--bts-color-primary);
  color: #ffffff;
  border-bottom: 4px solid var(--bts-color-accent);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.bts-header__inner {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0.85rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1.5rem;
}

.bts-header__actions {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.bts-header__ctas {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Logo */
.bts-logo {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  color: #ffffff;
  font-family: var(--bts-font-heading);
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: -0.02em;
  transition: color 0.15s ease;
}

.bts-logo:hover {
  color: var(--bts-color-accent);
}

.bts-logo img {
  max-height: 38px;
  width: auto;
}

/* Navigation Burger Menu - Always Kept for Clean Layout */
.bts-nav {
  position: relative;
  display: flex;
  align-items: center;
}

.bts-nav__checkbox {
  display: none !important;
}

.bts-nav__toggle {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  width: 28px;
  height: 18px;
  cursor: pointer;
  z-index: 10001;
  position: relative;
}

.bts-nav__toggle-bar {
  display: block;
  width: 100%;
  height: 3px;
  background-color: #ffffff;
  border-radius: var(--bts-radius);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

/* Checked States to Animate Burger to 'X' */
.bts-nav__checkbox:checked ~ .bts-nav__toggle .bts-nav__toggle-bar:nth-child(1) {
  transform: translateY(7.5px) rotate(45deg);
}

.bts-nav__checkbox:checked ~ .bts-nav__toggle .bts-nav__toggle-bar:nth-child(2) {
  opacity: 0;
}

.bts-nav__checkbox:checked ~ .bts-nav__toggle .bts-nav__toggle-bar:nth-child(3) {
  transform: translateY(-7.5px) rotate(-45deg);
}

/* Drawer Menu */
.bts-nav__list {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: 320px;
  max-width: 85vw;
  background-color: var(--bts-color-dark);
  padding: 6rem 2rem 2rem;
  margin: 0;
  list-style: none;
  z-index: 10000;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  overflow-y: auto;
  transform: translateX(100%);
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: -10px 0 30px rgba(0, 0, 0, 0.5);
  border-left: 3px solid var(--bts-color-accent);
}

.bts-nav__checkbox:checked ~ .bts-nav__list {
  transform: translateX(0);
}

/* Sibling Overlay backdrop */
.bts-nav__checkbox:checked ~ .bts-nav__list::after {
  content: "";
  position: fixed;
  top: 0;
  right: 320px;
  bottom: 0;
  left: -100vw;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(2px);
  z-index: -1;
  pointer-events: auto;
}

/* Navigation Menu Items */
.bts-nav__item {
  display: block;
}

.bts-nav__link {
  display: inline-block;
  color: #ffffff;
  text-decoration: none;
  font-family: var(--bts-font-heading);
  font-weight: 900;
  font-size: 1.15rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  transition: color 0.15s ease;
  position: relative;
  padding-bottom: 0.25rem;
}

.bts-nav__link:hover,
.bts-nav__link--active {
  color: var(--bts-color-accent);
}

.bts-nav__link--active::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background-color: var(--bts-color-accent);
}

/* Dropdown submenus */
.bts-nav__item--has-children {
  display: flex;
  flex-direction: column;
}

.bts-nav__submenu {
  list-style: none;
  padding-left: 1rem;
  margin-top: 0.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  border-left: 2px solid rgba(255, 255, 255, 0.15);
}

.bts-nav__submenu .bts-nav__link {
  font-size: 0.9rem;
  font-weight: 700;
}

/* Language Switcher */
.bts-lang {
  display: flex;
  list-style: none;
  gap: 0.35rem;
  padding: 0;
  margin: 0;
  align-items: center;
}

.bts-lang__link {
  font-family: var(--bts-font-heading);
  font-weight: 700;
  font-size: 0.75rem;
  text-decoration: none;
  color: rgba(255, 255, 255, 0.8);
  padding: 0.25rem 0.5rem;
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: var(--bts-radius);
  text-transform: uppercase;
  transition: all 0.15s ease;
}

.bts-lang__link:hover,
.bts-lang__link--active {
  color: var(--bts-color-accent);
  border-color: var(--bts-color-accent);
  background-color: rgba(255, 255, 255, 0.1);
}

/* Breadcrumbs */
.bts-breadcrumbs {
  background-color: #ffffff;
  border-bottom: 1px solid var(--bts-color-border);
  padding: 0.75rem 2rem;
}

.bts-breadcrumbs ol {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  align-items: center;
  max-width: 1400px;
  margin: 0 auto;
}

.bts-breadcrumbs__item {
  font-family: var(--bts-font-body);
  font-size: 0.8rem;
  color: var(--bts-color-muted);
  display: flex;
  align-items: center;
}

.bts-breadcrumbs__item:not(:last-child)::after {
  content: "/";
  margin-left: 0.5rem;
  color: var(--bts-color-border);
}

.bts-breadcrumbs__link {
  color: var(--bts-color-text);
  text-decoration: none;
  font-weight: 600;
  transition: color 0.15s ease;
}

.bts-breadcrumbs__link:hover {
  color: var(--bts-color-accent);
}

/* CTA Buttons */
.bts-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 1.15rem;
  font-family: var(--bts-font-heading);
  font-weight: 700;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: var(--bts-radius);
  text-decoration: none;
  border: 2px solid transparent;
  transition: transform 0.1s ease, opacity 0.1s ease;
  cursor: pointer;
}

.bts-cta:hover {
  transform: scale(1.02);
  opacity: 0.95;
}

.bts-cta--primary {
  background-color: var(--bts-color-accent);
  color: #ffffff;
}

.bts-cta--secondary {
  background-color: transparent;
  color: #ffffff;
  border-color: #ffffff;
}

/* Adjustments for non-header secondary buttons */
main .bts-cta--secondary {
  color: var(--bts-color-text);
  border-color: var(--bts-color-text);
}

/* Footer */
.bts-footer {
  background-color: var(--bts-color-primary);
  color: #ffffff;
  border-top: 5px solid var(--bts-color-accent);
  padding: 4rem 2rem 2rem;
}

.bts-footer__inner {
  max-width: 1400px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
}

@media (min-width: 768px) {
  .bts-footer__inner {
    grid-template-columns: 2fr 1.2fr 1.2fr;
  }
}

.bts-footer__brand {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  align-items: flex-start;
}

.bts-footer__logo img {
  max-height: 40px;
  width: auto;
}

.bts-footer__description {
  font-size: 0.9rem;
  opacity: 0.9;
  line-height: 1.6;
  max-width: 360px;
}

.bts-footer__ctas {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  width: 100%;
  max-width: 260px;
}

.bts-footer__ctas .bts-cta {
  width: 100%;
  text-align: center;
}

.bts-footer__heading {
  font-family: var(--bts-font-heading);
  font-weight: 900;
  text-transform: uppercase;
  font-size: 1rem;
  letter-spacing: 0.05em;
  margin-bottom: 1.5rem;
  border-bottom: 2px solid var(--bts-color-accent);
  padding-bottom: 0.25rem;
  display: inline-block;
}

/* Footer Secondary Menu */
.bts-footer-nav__list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.bts-footer-nav__link {
  color: #ffffff;
  text-decoration: none;
  font-family: var(--bts-font-body);
  font-weight: 600;
  font-size: 0.9rem;
  transition: color 0.15s ease;
}

.bts-footer-nav__link:hover {
  color: var(--bts-color-accent);
}

/* Compliance Section */
.bts-footer__compliance {
  display: flex;
  flex-direction: column;
}

.bts-footer__address {
  font-style: normal;
  font-size: 0.85rem;
  line-height: 1.6;
  opacity: 0.9;
}

/* Footer Bottom Bar */
.bts-footer__bottom {
  max-width: 1400px;
  margin: 3rem auto 0;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
  font-size: 0.75rem;
  opacity: 0.8;
  text-align: center;
}

@media (min-width: 768px) {
  .bts-footer__bottom {
    flex-direction: row;
    text-align: left;
  }
}

/* Mobile responsive tweaks */
@media (max-width: 600px) {
  .bts-header__ctas {
    display: none; /* Hide header CTAs on narrow viewport to prioritize branding and burger */
  }
  .bts-header__inner {
    padding: 0.85rem 1rem;
  }
  .bts-breadcrumbs {
    padding: 0.75rem 1rem;
  }
}