/* ============================================================
   BG Remover — Base Layout & Global Elements
   ============================================================ */

body {
  overflow-x: hidden;
}

#main {
  display: block;
}

.container {
  width: 100%;
  max-width: var(--container-lg);
  margin: 0 auto;
  padding-left: var(--container-pad);
  padding-right: var(--container-pad);
}

section {
  scroll-margin-top: calc(var(--header-height) + 16px);
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: inherit;
  font-weight: var(--fw-semibold);
  font-size: var(--fs-sm);
  line-height: 1;
  padding: 12px 20px;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  transition:
    background-color var(--dur-fast) var(--ease-standard),
    color var(--dur-fast) var(--ease-standard),
    border-color var(--dur-fast) var(--ease-standard),
    transform var(--dur-fast) var(--ease-standard),
    box-shadow var(--dur-fast) var(--ease-standard);
  cursor: pointer;
  user-select: none;
  text-decoration: none;
  white-space: nowrap;
}

.btn svg {
  flex-shrink: 0;
}

.btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.btn:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
}

.btn-primary {
  background: var(--accent);
  color: var(--color-black);
  border-color: var(--accent);
}

.btn-primary:hover:not(:disabled) {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-primary:active:not(:disabled) {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

.btn-outline {
  background: transparent;
  color: var(--fg-primary);
  border-color: var(--border-strong);
}

.btn-outline:hover:not(:disabled) {
  background: var(--bg-subtle);
  border-color: var(--fg-primary);
}

.btn-ghost {
  background: transparent;
  color: var(--fg-secondary);
  border-color: transparent;
}

.btn-ghost:hover:not(:disabled) {
  background: var(--bg-subtle);
  color: var(--fg-primary);
}

.btn-lg {
  font-size: var(--fs-base);
  padding: 16px 28px;
}

.btn-sm {
  font-size: var(--fs-xs);
  padding: 9px 16px;
}

.btn-icon {
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: var(--radius-md);
}

/* ---------- Badges ---------- */

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: var(--fs-xs);
  font-weight: var(--fw-semibold);
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  background: var(--bg-subtle);
  color: var(--fg-secondary);
  border: 1px solid var(--border-default);
}

/* ---------- Utility ---------- */

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

.accent {
  color: var(--color-black);
  background: linear-gradient(transparent 62%, var(--color-yellow) 62%);
  padding: 0 2px;
}

[data-theme="dark"] .accent {
  color: var(--color-white);
}

.stack > * + * {
  margin-top: var(--space-4);
}

.text-center {
  text-align: center;
}

/* ---------- Sections (base spacing) ---------- */

.hero,
.upload-section,
.features-section,
.how-section,
.formats-section,
.privacy-section,
.ai-section,
.faq-section,
.cta-section {
  padding-block: clamp(64px, 8vw, 112px);
}

/* ---------- Responsive helpers ---------- */

@media (max-width: 640px) {
  .btn-lg {
    font-size: var(--fs-sm);
    padding: 14px 22px;
  }
  .btn {
    padding: 11px 18px;
  }
}