/* Tronix Design System — Layout */

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: var(--leading-normal);
  color: var(--color-neutral-800);
  background: var(--color-white);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: var(--weight-bold);
  line-height: var(--leading-tight);
  color: var(--color-primary);
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-accent-hover);
}

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

.site-wrapper {
  overflow-x: hidden;
}

.container--site {
  max-width: var(--container-max);
  margin: 0 auto;
  padding-left: var(--space-6);
  padding-right: var(--space-6);
}

/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: transparent;
  border-bottom: 1px solid transparent;
  height: var(--header-height);
  transition: height var(--transition-base), background var(--transition-base),
    border-color var(--transition-base), box-shadow var(--transition-base),
    transform var(--transition-slow);
}

.site-header.is-scrolled {
  height: var(--header-height-scrolled);
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(12px);
  border-bottom-color: var(--color-neutral-100);
  box-shadow: var(--shadow-md);
}

.site-header.is-hidden {
  transform: translateY(-100%);
}

.site-header.is-scrolled .site-nav a,
.site-header.is-scrolled .nav-toggle {
  color: var(--color-primary);
}

.site-header:not(.is-scrolled) .site-nav a {
  color: rgba(255, 255, 255, 0.92);
}

.site-header:not(.is-scrolled) .site-nav a:hover,
.site-header:not(.is-scrolled) .site-nav a.is-active {
  color: var(--color-white);
}

.site-header:not(.is-scrolled) .site-nav a.is-active::after {
  background: var(--color-accent-bright);
}

.site-header:not(.is-scrolled) .nav-toggle {
  color: var(--color-white);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-6);
  transition: height var(--transition-base);
}

.site-header:not(.is-scrolled) .site-header__logo img {
  filter: brightness(0) invert(1);
}

.site-header.is-scrolled .site-header__logo img {
  width: 130px;
}

.site-header__logo img {
  width: 150px;
  height: auto;
  transition: width var(--transition-base);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-nav a {
  font-family: var(--font-heading);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-primary);
  text-decoration: none;
  padding: var(--space-2) 0;
  position: relative;
}

.site-nav a:hover,
.site-nav a.is-active {
  color: var(--color-accent);
}

.site-nav a.is-active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--color-accent);
}

.site-header__cta {
  margin-left: var(--space-4);
}

.site-header:not(.is-scrolled) .btn--primary.site-header__cta {
  background: var(--color-white);
  color: var(--color-primary);
  border-color: var(--color-white);
}

.site-header:not(.is-scrolled) .btn--primary.site-header__cta:hover {
  background: var(--color-accent-light);
  color: var(--color-primary);
  border-color: var(--color-accent-light);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: var(--text-xl);
  color: var(--color-primary);
  cursor: pointer;
  padding: var(--space-2);
}

/* Mobile sidepanel */
.sidepanel {
  position: fixed;
  top: 0;
  left: -320px;
  width: 320px;
  height: 100%;
  background: var(--color-white);
  z-index: 1100;
  transition: left var(--transition-base);
  box-shadow: var(--shadow-lg);
  overflow-y: auto;
}

.sidepanel.is-open {
  left: 0;
}

.sidepanel__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-4) var(--space-6);
  border-bottom: 1px solid var(--color-neutral-100);
}

.sidepanel__header img {
  width: 120px;
}

.sidepanel__close {
  background: none;
  border: none;
  font-size: var(--text-xl);
  cursor: pointer;
  color: var(--color-primary);
  padding: var(--space-2);
}

.sidepanel__nav {
  list-style: none;
  padding: var(--space-4) 0;
  margin: 0;
}

.sidepanel__nav a {
  display: block;
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-heading);
  font-weight: var(--weight-medium);
  color: var(--color-primary);
  text-decoration: none;
}

.sidepanel__nav a:hover,
.sidepanel__nav a.is-active {
  background: var(--color-accent-light);
  color: var(--color-accent);
}

.sidepanel-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(15, 27, 45, 0.5);
  z-index: 1050;
}

.sidepanel-overlay.is-visible {
  display: block;
}

/* Hero home — legacy fallback */
.hero {
  padding-top: calc(var(--header-height) + var(--space-16));
  padding-bottom: var(--space-16);
  background: linear-gradient(180deg, var(--color-neutral-50) 0%, var(--color-white) 100%);
}

.hero__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: center;
}

.hero__title {
  font-size: var(--text-5xl);
  font-weight: var(--weight-bold);
  color: var(--color-primary);
  margin-bottom: var(--space-6);
  line-height: 1.1;
}

.hero__text {
  font-size: var(--text-lg);
  color: var(--color-neutral-500);
  margin-bottom: var(--space-8);
  max-width: 520px;
}

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

.hero__image img {
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
}

/* Footer */
.site-footer {
  background: var(--color-primary);
  color: var(--color-neutral-300);
  padding: var(--space-16) 0 var(--space-8);
}

.site-footer a {
  color: var(--color-neutral-300);
  text-decoration: none;
}

.site-footer a:hover {
  color: var(--color-accent);
}

.site-footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: var(--space-10);
  margin-bottom: var(--space-10);
}

.site-footer__brand img {
  width: 140px;
  margin-bottom: var(--space-4);
}

.site-footer__brand p {
  font-size: var(--text-sm);
  margin-bottom: var(--space-4);
}

.site-footer__social {
  display: flex;
  gap: var(--space-3);
}

.site-footer__social a {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  background: var(--color-secondary);
  color: var(--color-white);
  font-size: var(--text-sm);
  transition: background var(--transition-fast);
}

.site-footer__social a:hover {
  background: var(--color-accent);
  color: var(--color-white);
}

.site-footer__heading {
  font-family: var(--font-heading);
  font-size: var(--text-base);
  font-weight: var(--weight-semibold);
  color: var(--color-white);
  margin-bottom: var(--space-4);
}

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

.site-footer__links li {
  margin-bottom: var(--space-2);
}

.site-footer__links a {
  font-size: var(--text-sm);
}

.site-footer__contact-item {
  display: flex;
  gap: var(--space-3);
  margin-bottom: var(--space-3);
  font-size: var(--text-sm);
  align-items: flex-start;
}

.site-footer__contact-item i {
  color: var(--color-accent);
  margin-top: 3px;
  flex-shrink: 0;
}

.site-footer__newsletter {
  text-align: center;
  padding-bottom: var(--space-10);
  border-bottom: 1px solid var(--color-secondary);
  margin-bottom: var(--space-10);
}

.site-footer__newsletter h3 {
  color: var(--color-white);
  font-size: var(--text-2xl);
  margin-bottom: var(--space-2);
}

.site-footer__newsletter p {
  font-size: var(--text-sm);
  margin-bottom: var(--space-6);
}

.newsletter-form {
  display: flex;
  gap: var(--space-2);
  max-width: 440px;
  margin: 0 auto;
  position: relative;
}

.newsletter-form input {
  flex: 1;
  padding: var(--space-3) var(--space-4);
  border: 1px solid var(--color-secondary);
  border-radius: var(--radius-md);
  background: var(--color-secondary);
  color: var(--color-white);
  font-size: var(--text-sm);
}

.newsletter-form input::placeholder {
  color: var(--color-neutral-500);
}

.newsletter-form button {
  padding: var(--space-3) var(--space-4);
  background: var(--color-accent);
  border: none;
  border-radius: var(--radius-md);
  color: var(--color-white);
  cursor: pointer;
}

.newsletter-message {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  margin-top: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-accent);
  display: none;
}

.site-footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-4);
  font-size: var(--text-sm);
  padding-top: var(--space-6);
  border-top: 1px solid var(--color-secondary);
}

/* Back to top */
#backToTopBtn {
  display: none;
  position: fixed;
  bottom: var(--space-6);
  right: var(--space-6);
  z-index: 999;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  background: var(--color-accent);
  color: var(--color-white);
  border: none;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  transition: background var(--transition-fast);
}

#backToTopBtn:hover {
  background: var(--color-accent-hover);
}

/* Responsive */
@media (max-width: 1199px) {
  .site-nav {
    gap: var(--space-4);
  }

  .site-header__logo img {
    width: 130px;
  }
}

@media (max-width: 991px) {
  .site-nav,
  .site-header__cta {
    display: none;
  }

  .nav-toggle {
    display: block;
  }

  .hero__grid {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero__text {
    margin-left: auto;
    margin-right: auto;
  }

  .hero__actions {
    justify-content: center;
  }

  .site-footer__grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 575px) {
  .hero__title {
    font-size: var(--text-3xl);
  }

  .site-footer__grid {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .site-footer__social {
    justify-content: center;
  }

  .site-footer__contact-item {
    justify-content: center;
  }

  .site-footer__bottom {
    flex-direction: column;
    text-align: center;
  }

  .newsletter-form {
    flex-direction: column;
  }
}