/* ============================================================
   button.css — Button component: primary, secondary, ghost
   Depends on: variables.css
   ============================================================ */

/* ── Base ───────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-family);
  font-weight: var(--font-weight-bold);
  font-size: var(--text-btn-l);
  line-height: 1;
  text-decoration: none;
  white-space: nowrap;
  border: 2px solid transparent;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition-fast);
  /* Minimum touch target */
  min-height: 44px;
  padding: 14px 28px;
}

.btn:disabled,
.btn[aria-disabled="true"] {
  opacity: 0.55;
  cursor: not-allowed;
  pointer-events: none;
}

/* ── Sizes ──────────────────────────────────────────────── */
.btn--lg {
  font-size: var(--text-btn-l);
  padding: 16px 32px;
  min-height: 52px;
}

.btn--sm {
  font-size: var(--text-btn-m);
  padding: 10px 20px;
  min-height: 44px;
}

/* Full-width */
.btn--full {
  width: 100%;
}

/* ── Primary (yellow CTA) ───────────────────────────────── */
.btn--primary {
  background-color: var(--color-accent);
  color: var(--color-text-on-accent);
  border-color: var(--color-accent);
  box-shadow: var(--shadow-btn-accent);
}

.btn--primary:hover,
.btn--primary:focus-visible {
  background-color: var(--color-accent-dark);
  border-color: var(--color-accent-dark);
  box-shadow: 0 6px 20px rgba(255, 217, 19, 0.45);
  transform: translateY(-1px);
  color: var(--color-text-on-accent);
  text-decoration: none;
}

.btn--primary:active {
  transform: translateY(0);
  box-shadow: var(--shadow-btn-accent);
}

/* ── Secondary (blue outline) ───────────────────────────── */
.btn--secondary {
  background-color: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn--secondary:hover,
.btn--secondary:focus-visible {
  background-color: var(--color-primary);
  color: var(--color-text-on-dark);
  text-decoration: none;
}

.btn--secondary:active {
  background-color: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  color: var(--color-text-on-dark);
}

/* ── Ghost (white — for dark/blue backgrounds) ──────────── */
.btn--ghost {
  background-color: rgba(255, 255, 255, 0.15);
  color: var(--color-text-on-dark);
  border-color: rgba(255, 255, 255, 0.55);
}

.btn--ghost:hover,
.btn--ghost:focus-visible {
  background-color: rgba(255, 255, 255, 0.28);
  border-color: rgba(255, 255, 255, 0.8);
  color: var(--color-text-on-dark);
  text-decoration: none;
}

/* ── Loading state ──────────────────────────────────────── */
.btn--loading {
  position: relative;
  color: transparent;
  pointer-events: none;
}

.btn--loading::after {
  content: '';
  position: absolute;
  width: 18px;
  height: 18px;
  border: 2px solid currentColor;
  border-top-color: transparent;
  border-radius: 50%;
  animation: btn-spin 0.7s linear infinite;
  color: var(--color-text-on-accent);
}

@keyframes btn-spin {
  to { transform: rotate(360deg); }
}

/* ── Icon inside button ─────────────────────────────────── */
.btn svg {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
}

.btn--lg svg {
  width: 22px;
  height: 22px;
}