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

html, body {
  width: 100%;
  height: 100%;
  overflow-x: hidden;
}

body {
  font-family: var(--font-base);
  font-size: 1rem;
  line-height: var(--line-height-base);
  color: var(--text);
  background-color: var(--bg);
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
}

/* Header */
header {
  position: sticky;
  top: 0;
  z-index: 40;
  border-bottom: 1px solid var(--border-light);
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(10px);
}

main section[id] {
  scroll-margin-top: var(--header-offset, 90px);
}

.header-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--spacing-md) var(--spacing-lg);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-md);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.25rem;
  color: var(--primary-dark);
  text-decoration: none;
  min-width: 0;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.logo img {
  width: 10rem;
  height: auto;
  max-width: 100%;
  object-fit: contain;
  display: block;
}

nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
  font-size: 0.875rem;
  font-weight: 500;
}

nav a {
  color: var(--text-light);
  text-decoration: none;
  transition: color 0.2s;
  position: relative;
}

nav a:hover {
  color: var(--text);
}

nav a.active {
  color: var(--primary);
  font-weight: 600;
}

/* Main container */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
  width: 100%;
}

/* Footer */
footer {
  background-color: var(--footer-bg);
  color: var(--footer-text);
  padding: var(--spacing-4xl) var(--spacing-lg) var(--spacing-2xl);
  margin-top: auto;
}

.footer-grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  gap: var(--spacing-2xl);
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 960px) {
  .footer-grid {
    grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
    gap: var(--spacing-2xl);
  }
}

.footer-col {
  display: flex;
  flex-direction: column;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.footer-logo-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 3rem;
  height: 3rem;
  padding: 0.35rem;
  background: #FFFFFF;
  border-radius: var(--radius-md);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.35);
  flex-shrink: 0;
}

.footer-logo-chip img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

.footer-brand-name {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--footer-heading);
}

.footer-desc {
  max-width: 16rem;
  margin-top: var(--spacing-md);
  font-size: 0.875rem;
  color: var(--footer-muted);
  line-height: var(--line-height-relaxed);
}

.footer-title {
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--footer-heading);
  margin-bottom: var(--spacing-md);
}

.footer-nav {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--spacing-sm);
  font-size: 0.875rem;
  font-weight: 400;
}

.footer-nav a {
  color: var(--footer-text);
  text-decoration: none;
  transition: color 0.2s;
  width: fit-content;
}

.footer-nav a:hover {
  color: #FFFFFF;
}

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-sm);
  font-size: 0.875rem;
  color: var(--footer-text);
  margin-bottom: var(--spacing-sm);
}

.footer-contact-item svg {
  width: 1.05rem;
  height: 1.05rem;
  flex-shrink: 0;
  margin-top: 0.15rem;
  color: var(--primary-light);
}

.footer-contact-item a {
  color: var(--footer-text);
  text-decoration: none;
  transition: color 0.2s;
}

.footer-contact-item a:hover {
  color: #FFFFFF;
}

.footer-divider {
  max-width: 1200px;
  margin: var(--spacing-2xl) auto 0;
  border-top: 1px solid var(--footer-border);
  padding-top: var(--spacing-lg);
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  text-align: left;
  gap: var(--spacing-sm);
  font-size: 0.75rem;
  color: var(--footer-muted);
}

.footer-divider-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-start;
  gap: 0.35rem 0.5rem;
}

@media (min-width: 768px) {
  .footer-divider {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

.footer-divider a {
  color: var(--footer-muted);
  text-decoration: none;
  transition: color 0.2s;
}

.footer-divider a:hover {
  color: #FFFFFF;
}

/* Demo banner */
.demo-banner {
  background-color: var(--bg-light);
  color: var(--primary-dark);
  border-bottom: 1px solid var(--border-light);
  padding: var(--spacing-sm) var(--spacing-lg);
  text-align: center;
  font-size: 0.875rem;
}