/* =========================================================
   Buttons
   ========================================================= */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 32px;
  border-radius: var(--global-border-radius);
  border: 2px solid currentColor;
  background: transparent;
  font-family: 'Montserrat', sans-serif;
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast), transform var(--transition-fast);
  -webkit-user-select: none;
  user-select: none;
}

.btn:hover {
  background: currentColor;
  transform: scale(1.04);
}

.btn:hover span,
.btn:hover {
  color: var(--color-bg, var(--color-white));
}

.btn-primary {
  border-color: var(--color-accent, var(--color-blue));
  color: var(--color-accent, var(--color-blue));
}

.btn-primary:hover {
  background: var(--color-accent, var(--color-blue));
  color: var(--color-white);
}

.btn-ghost {
  border-color: currentColor;
}

/* =========================================================
   Links
   ========================================================= */

.link-primary,
.link-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.4em;
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  position: relative;
}

.link-primary::after,
.link-secondary::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1px;
  background: currentColor;
  transition: width var(--transition-fast);
}

.link-primary:hover::after,
.link-secondary:hover::after {
  width: 100%;
}

.link-primary {
  color: var(--color-accent, var(--color-blue));
}

.link-secondary {
  opacity: 0.6;
}

.link-secondary:hover {
  opacity: 1;
}

/* =========================================================
   App cards
   ========================================================= */

.app-card {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: 2rem;
  border: 1px solid var(--color-border, rgba(0, 0, 0, 0.1));
  border-radius: var(--global-border-radius);
  background: rgba(255, 255, 255, 0.04);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
}

.app-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.12);
  border-color: var(--color-accent, var(--color-blue));
}

.app-logo {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: contain;
  border-radius: calc(var(--global-border-radius) - 4px);
  background: #0d0d12;
  padding: 1.5rem;
}

.app-links {
  display: flex;
  gap: 1.5rem;
  align-items: center;
}

.app-stack {
  opacity: 0.5;
  font-family: 'IBM Plex Mono', monospace;
}

/* =========================================================
   Plugin cards
   ========================================================= */

.plugin-card {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: 2rem;
  border: 1px solid var(--color-border, rgba(0, 0, 0, 0.1));
  border-radius: var(--global-border-radius);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.plugin-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.12);
}

/* =========================================================
   Newsletter form
   ========================================================= */

.newsletter-form {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  align-items: center;
}

.newsletter-form input[type='email'] {
  flex: 1;
  min-width: 220px;
  padding: 12px 20px;
  border: 2px solid var(--color-border, rgba(0, 0, 0, 0.15));
  border-radius: var(--global-border-radius);
  background: transparent;
  font-family: 'Montserrat', sans-serif;
  font-size: 1rem;
  color: inherit;
  transition: border-color var(--transition-fast);
  outline: none;
}

.newsletter-form input[type='email']::placeholder {
  opacity: 0.4;
}

.newsletter-form input[type='email']:focus {
  border-color: var(--color-accent, var(--color-blue));
}


/* =========================================================
   Header scroll states — theme-aware frosted background
   ========================================================= */

#header {
  transition: background var(--transition-normal), border-color var(--transition-normal);
}

#header.is-scrolled {
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

html.is-white-bg #header.is-scrolled {
  background: rgba(240, 241, 250, 0.82);
}

html.is-black-bg #header.is-scrolled {
  background: rgba(0, 0, 0, 0.75);
}

html.is-blue-bg #header.is-scrolled {
  background: rgba(7, 27, 223, 0.72);
}

/* =========================================================
   Logo — invert to dark on light backgrounds so it's visible
   ========================================================= */

html.is-white-bg .logo-img {
  filter: invert(1);
}

html.is-black-bg .logo-img,
html.is-blue-bg .logo-img {
  filter: none;
}

/* =========================================================
   Section heading layout helper
   ========================================================= */

.section-header {
  grid-column: 1 / -1;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 2.5rem;
  flex-wrap: wrap;
  gap: 1rem;
}

/* =========================================================
   Logo image
   ========================================================= */

.logo-img {
  display: block;
  height: 48px;
  width: auto;
  object-fit: contain;
  transition: filter var(--transition-normal);
}

/* =========================================================
   Text utilities
   ========================================================= */

.text-muted {
  opacity: 0.75;
}

/* =========================================================
   Section eyebrow / counter
   ========================================================= */

.section-eyebrow {
  opacity: 0.5;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.section-counter {
  opacity: 0.5;
  align-self: flex-end;
}

/* =========================================================
   Hero layout helpers
   ========================================================= */

.hero-tagline {
  max-width: 520px;
  opacity: 0.75;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  align-items: center;
}

/* =========================================================
   Coming soon badge
   ========================================================= */

.badge-coming-soon {
  display: inline-block;
  padding: 4px 12px;
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-green);
  border: 1px solid var(--color-green);
  border-radius: 100px;
  opacity: 0.85;
}

/* =========================================================
   Card internals
   ========================================================= */

.card-label {
  opacity: 0.5;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

.card-spec {
  opacity: 0.5;
  font-family: 'IBM Plex Mono', monospace;
}

.card-links {
  margin-top: auto;
  padding-top: 1.5rem;
}

.card-links--flex {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}

/* =========================================================
   Footer helpers
   ========================================================= */

.footer-eyebrow {
  opacity: 0.5;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

/* =========================================================
   Back to top
   ========================================================= */

#back-to-top {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  font-size: 0.875rem;
  opacity: 0.6;
  cursor: pointer;
  transition: opacity var(--transition-fast);
  background: none;
  border: none;
  color: inherit;
  font-family: inherit;
}

#back-to-top:hover {
  opacity: 1;
}