/* ============================================================
   SMART WEB DESIGN — Buttons
   ============================================================ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 0.7rem 1.6rem;
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.01em;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition:
    transform var(--ease-bounce),
    box-shadow var(--ease-base),
    background var(--ease-base),
    border-color var(--ease-base),
    color var(--ease-base);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
}

/* Shimmer effect on hover */
.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(105deg, transparent 40%, rgba(255,255,255,0.1) 50%, transparent 60%);
  transform: translateX(-100%);
  transition: transform 0.5s ease;
}
.btn:hover::after { transform: translateX(100%); }

/* --- Primary (gradient) --- */
.btn--primary {
  background: var(--gradient-accent);
  color: #fff;
  box-shadow: 0 4px 20px rgba(0, 212, 255, 0.25);
}
.btn--primary:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 8px 32px rgba(0, 212, 255, 0.4);
}
.btn--primary:active { transform: translateY(0) scale(0.99); }

/* --- Outline --- */
.btn--outline {
  background: transparent;
  color: var(--color-text-primary);
  border: 1.5px solid var(--color-border-accent);
}
.btn--outline:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background: var(--color-accent-dim);
  transform: translateY(-2px);
}

/* --- Ghost (text only) --- */
.btn--ghost {
  background: transparent;
  color: var(--color-accent);
  padding-inline: var(--space-2);
}
.btn--ghost:hover {
  color: var(--color-text-primary);
}

/* --- Sizes --- */
.btn--lg {
  padding: 0.875rem 2rem;
  font-size: var(--text-base);
  border-radius: var(--radius-lg);
}

.btn--sm {
  padding: 0.45rem 1rem;
  font-size: var(--text-xs);
}

.btn--full { width: 100%; }

/* --- Icon button --- */
.btn i {
  font-size: 1.15em;
  line-height: 1;
  transition: transform var(--ease-base);
}
.btn:hover i.ph-arrow-right,
.btn:hover i.ph-arrow-up-right { transform: translate(3px, -2px); }

/* --- Disabled state --- */
.btn:disabled, .btn[aria-disabled="true"] {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
}