.skip-link {
  position: absolute; top: -100%; left: 16px;
  padding: 12px 24px;
  background: var(--color-text); color: var(--color-bg);
  border-radius: var(--radius-pill);
  font-weight: 500; font-size: var(--text-small);
  z-index: 200; transition: top 0.2s;
}
.skip-link:focus-visible { top: 16px; }

header {
  position: fixed; top: 0; left: 0; width: 100%; z-index: 100;
  background: var(--color-header-bg);
  border-bottom: 1px solid transparent;
  transition: background-color .4s ease, border-color .4s ease, backdrop-filter .4s ease;
}
header.scrolled {
  background: var(--color-header-bg-scroll);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom-color: var(--color-border);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 16px clamp(20px, 4vw, 48px);
  display: flex; align-items: center; justify-content: space-between;
}

.logo {
  font-family: var(--font-display);
  font-size: 1.25rem; font-weight: 400;
  letter-spacing: -0.02em;
  color: var(--color-text); text-decoration: none;
}
.logo:hover { opacity: 0.8; color: var(--color-text); }

.nav-links { display: flex; align-items: center; gap: 28px; }
.nav-links a {
  font-size: var(--text-small); font-weight: 500;
  color: var(--color-text-secondary); transition: color 0.2s;
  position: relative;
}
.nav-links a:hover,
.nav-links a.is-active { color: var(--color-text); }
.nav-links a.is-active::after {
  content: ''; position: absolute;
  bottom: -6px; left: 50%; transform: translateX(-50%);
  width: 4px; height: 4px; border-radius: 50%;
  background: var(--color-text);
}

.controls { display: flex; align-items: center; gap: 8px; }

.control-btn {
  display: flex; align-items: center; justify-content: center;
  width: 40px; height: 40px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-control);
  background: transparent;
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all .3s ease;
}
.control-btn:hover {
  background: var(--color-surface-alt);
  color: var(--color-text);
}
.control-btn svg { width: 18px; height: 18px; }

.menu-toggle {
  display: none;
  width: 40px; height: 40px;
  align-items: center; justify-content: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-control);
  color: var(--color-text-secondary);
  transition: all .3s ease;
}
.menu-toggle:hover { background: var(--color-surface-alt); color: var(--color-text); }
.menu-toggle svg { width: 20px; height: 20px; }

.mobile-menu {
  position: fixed; inset: 0; z-index: 101; background: var(--color-bg);
  display: flex; flex-direction: column;
  align-items: center; justify-content: center; gap: 32px;
  opacity: 0; visibility: hidden; transition: opacity 0.4s, visibility 0.4s;
}
.mobile-menu.is-open { opacity: 1; visibility: visible; }
.mobile-menu a {
  font-family: var(--font-display);
  font-size: clamp(2rem, 6vw, 3rem);
  color: var(--color-text); transition: opacity 0.2s;
}
.mobile-menu a:hover { opacity: 0.6; color: var(--color-text); }
.mobile-menu-close {
  position: absolute; top: 16px; right: clamp(20px, 4vw, 48px);
  width: 40px; height: 40px;
  display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-control);
  color: var(--color-text-secondary);
}
.mobile-menu-close svg { width: 20px; height: 20px; }

.btn-primary {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 32px;
  background: var(--color-text); color: var(--color-bg);
  border-radius: var(--radius-pill);
  font-size: var(--text-small); font-weight: 600;
  transition: all .3s ease;
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: var(--shadow-soft); color: var(--color-bg); }

.btn-ghost {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 32px;
  border: 1px solid var(--color-border-strong); color: var(--color-text);
  border-radius: var(--radius-pill);
  font-size: var(--text-small); font-weight: 600;
  transition: all .3s ease;
}
.btn-ghost:hover { background: var(--color-surface-alt); color: var(--color-text); }

.pill-row { display: flex; flex-wrap: wrap; gap: 8px; }
.pill {
  padding: 6px 14px;
  background: transparent; border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  font-size: var(--text-xs); font-weight: 500; color: var(--color-text-secondary);
  white-space: nowrap; transition: all .3s ease;
}
.pill:hover { background: var(--color-card-bg); border-color: var(--color-border-strong); }

.badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 14px; border: 1px solid var(--color-border);
  border-radius: var(--radius-pill);
  font-size: var(--text-xs); font-weight: 500; color: var(--color-text-secondary);
}

.platform-row { display: flex; gap: 14px; align-items: center; }
.platform-icon {
  width: 20px; height: 20px; color: var(--color-text-muted);
  transition: color 0.2s;
}
.platform-icon:hover { color: var(--color-text-secondary); }

.section-header { text-align: center; margin-bottom: clamp(48px, 6vw, 80px); }
.eyebrow {
  font-family: var(--font-body);
  font-size: var(--text-xs); font-weight: 500;
  letter-spacing: 0.15em; text-transform: uppercase;
  color: var(--color-text-muted); margin-bottom: 12px;
  display: flex; align-items: center; justify-content: center; gap: 8px;
}
.section-header h2 { margin-bottom: 16px; }
.section-sub {
  font-size: var(--text-body); color: var(--color-text-secondary);
  max-width: 560px; margin: 0 auto;
}

.site-footer {
  padding: var(--space-section) 0 48px; text-align: center;
  border-top: 1px solid var(--color-border);
}
.footer-logo {
  font-family: var(--font-display);
  font-size: 1.125rem; color: var(--color-text-muted); margin-bottom: 24px;
  opacity: 0.5;
}
.footer-legal {
  font-size: var(--text-small); color: var(--color-text-muted);
  margin-bottom: 16px; line-height: 1.8;
}
.footer-links { display: flex; justify-content: center; gap: 24px; }
.footer-links a {
  font-size: var(--text-small); color: var(--color-text-muted);
  text-decoration: underline; text-underline-offset: 3px;
  transition: color 0.2s;
}
.footer-links a:hover { color: var(--color-text); }

.feature-lines {
  font-size: var(--text-small); color: var(--color-text-secondary);
  line-height: 1.8;
}
.feature-sep { margin: 0 6px; opacity: 0.4; }