/* TOP Layout System */

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

* {
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  background-color: var(--top-color-bg);
}

img, picture, video, canvas, svg {
  display: block;
  max-width: 100%;
  height: auto;
}

input, button, textarea, select {
  font: inherit;
}

/* Container */
.top-container {
  width: 100%;
  max-width: var(--top-max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--top-container-padding);
  padding-right: var(--top-container-padding);
}

.top-container-narrow {
  max-width: 760px;
}

/* Grid */
.top-grid {
  display: grid;
  gap: var(--top-grid-gap);
}

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

.top-grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.top-grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

/* Sections */
.top-section {
  padding-top: var(--top-space-section);
  padding-bottom: var(--top-space-section);
}

.top-section-alt {
  background-color: var(--top-color-bg-soft);
}

.top-section-border {
  border-top: var(--top-border-width) solid var(--top-color-border);
}

/* Hero */
.top-hero {
  padding-top: clamp(4rem, 10vw, 8rem);
  padding-bottom: clamp(4rem, 10vw, 8rem);
  background-color: var(--top-color-bg);
  overflow: hidden;
}

.top-hero__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--top-space-2xl);
  align-items: center;
}

.top-hero__content {
  max-width: 600px;
}

.top-hero__title {
  font-size: var(--top-h1);
  font-weight: 600;
  line-height: var(--top-lh-tight);
  color: var(--top-color-primary);
  margin-bottom: var(--top-space-md);
  letter-spacing: -0.02em;
}

.top-hero__subtitle {
  font-size: var(--top-body);
  color: var(--top-color-muted);
  line-height: var(--top-lh-body);
  margin-bottom: var(--top-space-lg);
  max-width: 520px;
}

.top-hero__cta {
  display: flex;
  gap: var(--top-space-sm);
  flex-wrap: wrap;
}

.top-hero__image {
  position: relative;
  aspect-ratio: 4/3;
}

.top-hero__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--top-radius-lg);
}

/* Two column layouts */
.top-two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--top-space-2xl);
  align-items: start;
}

.top-two-col--reverse {
  direction: rtl;
}

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

/* Mobile nav - hidden on desktop by default */
.top-mobile-nav {
  display: none;
}

.top-mobile-toggle {
  display: none;
}

/* Header */
.top-header {
  position: sticky;
  top: 0;
  z-index: var(--top-z-sticky);
  background-color: var(--top-color-bg);
  border-bottom: var(--top-border-width) solid var(--top-color-border);
}

.top-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.top-header__logo {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--top-color-primary);
  text-decoration: none;
  letter-spacing: -0.02em;
  white-space: nowrap;
}

.top-header__logo:hover {
  color: var(--top-color-primary);
  text-decoration: none;
}

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

.top-header__nav ul {
  display: flex;
  gap: var(--top-space-sm);
  list-style: none;
  padding: 0;
  margin: 0;
  align-items: center;
}

.top-header__nav li {
  margin: 0;
  padding: 0;
  white-space: nowrap;
}

.top-header__nav a {
  font-size: var(--top-small);
  font-weight: 500;
  color: var(--top-color-text);
  text-decoration: none;
  letter-spacing: 0.01em;
  transition: color var(--top-transition-fast);
  white-space: nowrap;
}

.top-header__nav a:hover {
  color: var(--top-color-accent);
  text-decoration: none;
}

.top-header__cta {
  margin-left: var(--top-space-md);
  white-space: nowrap;
}

/* Footer */
.top-footer {
  background-color: var(--top-color-primary);
  color: var(--top-color-white);
  padding-top: var(--top-space-2xl);
  padding-bottom: var(--top-space-lg);
}

.top-footer a {
  color: rgba(255,255,255,0.7);
  text-decoration: none;
}

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

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

.top-footer__title {
  font-size: var(--top-small);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--top-space-md);
  color: rgba(255,255,255,0.5);
}

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

.top-footer__links li {
  margin-bottom: var(--top-space-xs);
}

.top-footer__bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: var(--top-space-md);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: var(--top-caption);
  color: rgba(255,255,255,0.5);
}

/* Breadcrumb */
.top-breadcrumb {
  padding-top: var(--top-space-sm);
  padding-bottom: var(--top-space-sm);
  border-bottom: var(--top-border-width) solid var(--top-color-border);
}

.top-breadcrumb__list {
  display: flex;
  list-style: none;
  padding: 0;
  margin: 0;
  flex-wrap: wrap;
  gap: 0.25rem;
  font-size: var(--top-small);
  color: var(--top-color-muted);
}

.top-breadcrumb__item {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.top-breadcrumb__link {
  color: var(--top-color-muted);
  text-decoration: none;
}

.top-breadcrumb__link:hover {
  color: var(--top-color-accent);
  text-decoration: underline;
}

.top-breadcrumb__sep {
  color: var(--top-color-border);
  margin: 0 0.25rem;
}

.top-breadcrumb__item.is-current {
  color: var(--top-color-text);
}