/* ── Utilities ── */
.container {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-xl);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ── Icons ── */
.icon {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex-shrink: 0;
}

.icon--sm { width: 16px; height: 16px; }
.icon--lg { width: 24px; height: 24px; }
.icon--xl { width: 32px; height: 32px; }
.icon--2xl { width: 40px; height: 40px; }
.icon--brand { stroke: none; fill: currentColor; }

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 0.5em 1.1em;
  font: inherit;
  font-size: var(--text-md);
  font-weight: 500;
  line-height: var(--line-height-tight);
  color: var(--color-text-on-primary);
  background: var(--color-primary);
  border: 1px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast);
  white-space: nowrap;
  text-decoration: none;
}

.btn:hover {
  background: var(--color-primary-hover);
  color: var(--color-text-on-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
}

.btn--ghost {
  color: var(--color-text);
  background: var(--color-surface);
  border-color: var(--color-border-strong);
}

.btn--ghost:hover {
  background: var(--color-surface-hover);
  color: var(--color-text);
}

.btn--lg {
  font-size: var(--text-lg);
  padding: 0.6em 1.3em;
}

.btn--sm {
  font-size: var(--text-sm);
  padding: 0.4em 0.9em;
}

.btn--disabled {
  opacity: 0.4;
  cursor: default;
  pointer-events: none;
}

/* ── Navigation ── */
.nav {
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  background: rgba(17, 17, 17, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

[data-theme="light"] .nav {
  background: rgba(255, 255, 255, 0.85);
}

.nav__inner {
  display: flex;
  align-items: center;
  height: var(--nav-height);
  gap: var(--space-lg);
}

.nav__logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-weight: 700;
  font-size: var(--text-lg);
  color: var(--color-text);
  text-decoration: none;
}

.nav__logo:hover {
  color: var(--color-primary);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  list-style: none;
  margin-inline-start: auto;
}

.nav__link {
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  font-weight: 500;
  transition: color var(--transition-fast);
}

.nav__link:hover {
  color: var(--color-text);
}

.nav__theme-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.nav__theme-toggle:hover {
  color: var(--color-text);
  border-color: var(--color-border-strong);
}

.nav__mobile-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: none;
  border: none;
  color: var(--color-text);
  cursor: pointer;
  margin-inline-start: auto;
}

/* ── Mobile Nav ── */
@media (max-width: 768px) {
  .nav__links {
    display: none;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: var(--space-lg);
    gap: var(--space-md);
  }

  .nav__links--open {
    display: flex;
  }

  .nav__mobile-toggle {
    display: flex;
  }
}

/* ── Hero ── */
.hero {
  padding-block: var(--space-4xl);
  text-align: center;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  padding: 0.25em 0.8em;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-primary);
  background: var(--color-primary-subtle);
  border-radius: var(--radius-pill);
  margin-bottom: var(--space-xl);
}

.hero__title {
  font-size: var(--text-display);
  font-weight: 700;
  line-height: var(--line-height-tight);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-lg);
}

.hero__subtitle {
  font-size: var(--text-lg);
  color: var(--color-text-secondary);
  max-width: 600px;
  margin-inline: auto;
  margin-bottom: var(--space-2xl);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-md);
}

.hero__meta {
  display: flex;
  justify-content: center;
  gap: var(--space-xl);
  margin-top: var(--space-2xl);
  color: var(--color-text-tertiary);
  font-size: var(--text-sm);
}

.hero__meta-item {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

/* ── Sections ── */
.section {
  padding-block: var(--space-4xl);
}

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

.section__header {
  text-align: center;
  margin-bottom: var(--space-3xl);
}

.section__title {
  font-size: var(--text-2xl);
  font-weight: 700;
  line-height: var(--line-height-tight);
  margin-bottom: var(--space-sm);
}

.section__subtitle {
  font-size: var(--text-md);
  color: var(--color-text-secondary);
}

/* ── Feature Cards ── */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: var(--space-xl);
}

.feature-card {
  padding: var(--space-xl);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: transform var(--transition-md), box-shadow var(--transition-md);
}

.feature-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.feature-card__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: var(--color-primary-subtle);
  color: var(--color-primary);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-lg);
}

.feature-card__title {
  font-size: var(--text-lg);
  font-weight: 600;
  margin-bottom: var(--space-sm);
}

.feature-card__desc {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
  line-height: var(--line-height);
}

/* ── Privacy Cards ── */
.privacy-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-xl);
}

.privacy-card {
  display: flex;
  align-items: flex-start;
  gap: var(--space-lg);
  padding: var(--space-xl);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.privacy-card__icon {
  flex-shrink: 0;
  color: var(--color-success);
}

.privacy-card__title {
  font-weight: 600;
  margin-bottom: var(--space-xs);
}

.privacy-card__desc {
  font-size: var(--text-sm);
  color: var(--color-text-secondary);
}

/* ── Bottom CTA ── */
.bottom-cta {
  padding-block: var(--space-4xl);
  text-align: center;
  background: var(--color-bg-alt);
}

.bottom-cta__title {
  font-size: var(--text-2xl);
  font-weight: 700;
  margin-bottom: var(--space-sm);
}

.bottom-cta__subtitle {
  color: var(--color-text-secondary);
  margin-bottom: var(--space-2xl);
}

.bottom-cta__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-md);
}

/* ── Footer ── */
.footer {
  padding-block: var(--space-2xl);
  border-top: 1px solid var(--color-border);
  text-align: center;
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
}

.footer__links {
  display: flex;
  justify-content: center;
  gap: var(--space-lg);
  margin-top: var(--space-md);
}

.footer__link {
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
}

.footer__link:hover {
  color: var(--color-text);
}

/* ── Responsive ── */
@media (max-width: 768px) {
  .hero {
    padding-block: var(--space-3xl);
  }

  .section {
    padding-block: var(--space-3xl);
  }

  .container {
    padding-inline: var(--space-lg);
  }
}