/* =========================================================
   Buttons — premium visual weight, larger tap targets, icon gap
   ========================================================= */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.8rem 1.5rem;
  font-family: var(--font-heading);
  font-size: 0.92rem;
  font-weight: 700;
  border-radius: var(--radius-btn);
  cursor: pointer;
  border: 1.5px solid transparent;
  text-decoration: none;
  text-align: center;
  line-height: 1.2;
  letter-spacing: 0.005em;
  white-space: nowrap;
  min-height: 44px;
  position: relative;
  transition: transform 250ms var(--ease-out-expo),
              box-shadow 250ms var(--ease-out-expo),
              background-color 200ms ease,
              border-color 200ms ease,
              color 200ms ease,
              filter 200ms ease;
}

.btn svg, .btn i, .btn .btn-icon svg, .btn .btn-icon i {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

/* Primary — gold filled, navy text (the brand CTA) */
.btn-primary {
  background: linear-gradient(180deg, #e0bd46 0%, var(--color-gold) 50%, #b8941f 100%);
  color: var(--color-navy);
  border-color: var(--color-gold);
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.25) inset,
    0 6px 18px rgba(212, 175, 55, 0.30);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow:
    0 1px 0 rgba(255, 255, 255, 0.30) inset,
    0 10px 24px rgba(212, 175, 55, 0.40);
  filter: brightness(1.04);
}
.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 2px 8px rgba(212, 175, 55, 0.30);
}
.btn-primary:focus-visible {
  outline: 2px solid var(--color-gold);
  outline-offset: 3px;
}

/* Secondary — transparent w/ gold border */
.btn-secondary {
  background: rgba(255, 255, 255, 0.04);
  border-color: var(--color-gold);
  color: var(--color-gold);
  backdrop-filter: blur(4px);
}
.btn-secondary:hover {
  background: var(--color-gold-10);
  color: var(--color-gold);
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(212, 175, 55, 0.20);
}
.btn-secondary:active { transform: translateY(0); }
.btn-secondary:focus-visible {
  outline: 2px solid var(--color-gold);
  outline-offset: 3px;
}

/* Solid (white-on-navy) — used for hero panels */
.btn-solid {
  background: var(--color-white);
  color: var(--color-navy);
  border-color: var(--color-white);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.15);
}
.btn-solid:hover {
  transform: translateY(-2px);
  background: var(--color-slate-50);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.20);
}

/* Danger */
.btn-danger {
  background: linear-gradient(180deg, #ef4444 0%, var(--color-danger) 100%);
  color: var(--color-white);
  border-color: var(--color-danger);
  box-shadow: 0 6px 18px rgba(220, 38, 38, 0.25);
}
.btn-danger:hover {
  transform: translateY(-2px);
  filter: brightness(1.08);
  box-shadow: 0 10px 24px rgba(220, 38, 38, 0.32);
}

/* Ghost — minimal, for low-emphasis actions */
.btn-ghost {
  background: transparent;
  color: inherit;
  border-color: transparent;
  padding: 0.55rem 0.9rem;
  font-size: 0.85rem;
  min-height: 36px;
}
.btn-ghost:hover {
  background: rgba(13, 27, 42, 0.05);
  color: var(--color-gold);
}

/* Inverse — light-on-navy, for dark backgrounds */
.btn-inverse {
  background: var(--color-white);
  color: var(--color-navy);
  border-color: var(--color-white);
}
.btn-inverse:hover {
  background: var(--color-slate-100);
  transform: translateY(-2px);
  box-shadow: 0 10px 22px rgba(0, 0, 0, 0.20);
}

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

/* Sizes */
.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.82rem;
  min-height: 36px;
  gap: 0.35rem;
}
.btn-lg {
  padding: 1rem 1.85rem;
  font-size: 1rem;
  min-height: 52px;
  border-radius: 16px;
}

/* Disabled state */
.btn-disabled,
.btn:disabled {
  opacity: 0.48;
  cursor: not-allowed;
  pointer-events: none;
}

/* Loading spinner inside button */
.btn-loading::after {
  content: '';
  display: inline-block;
  width: 14px;
  height: 14px;
  border: 2px solid currentColor;
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  margin-left: 0.5rem;
}

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

/* Focus ring for keyboard users on all variants */
.btn:focus-visible {
  outline: 2px solid var(--color-gold);
  outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
  .btn, .btn:hover, .btn:active { transform: none; transition: none; }
}