/* ═══════════════════════════════════════════════════════════════
   Buttons — MC Виан B2B Portal
   ═══════════════════════════════════════════════════════════════ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 10px 20px;
  font-size: 14px;
  font-weight: 600;
  line-height: 1.4;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  transition: var(--transition);
  white-space: nowrap;
  user-select: none;
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

.btn:hover {
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}
.btn:active {
  transform: translateY(0);
  box-shadow: none;
}
.btn:disabled,
.btn.is-disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
  transform: none;
  box-shadow: none;
}

/* Variants */
.btn-primary {
  background: var(--color-primary);
  color: #fff;
}
.btn-primary:hover {
  background: var(--color-primary-dark);
  color: #fff;
}

.btn-secondary {
  background: var(--color-text);
  color: #fff;
}
.btn-secondary:hover {
  background: #1a2435;
  color: #fff;
}

.btn-outline {
  background: transparent;
  border-color: var(--color-border);
  color: var(--color-text);
}
.btn-outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: var(--color-primary-light);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text-secondary);
}
.btn-ghost:hover {
  background: var(--color-bg);
  color: var(--color-text);
  box-shadow: none;
  transform: none;
}

.btn-danger {
  background: var(--color-danger);
  color: #fff;
}
.btn-danger:hover {
  background: #DC2626;
  color: #fff;
}

.btn-success {
  background: var(--color-success);
  color: #fff;
}
.btn-success:hover {
  background: #16A34A;
  color: #fff;
}

.btn-white {
  background: #fff;
  color: var(--color-primary);
  border-color: rgba(255,255,255,0.3);
}
.btn-white:hover {
  background: #F0F7FF;
  color: var(--color-primary-dark);
}

/* Sizes */
.btn-sm {
  padding: 6px 14px;
  font-size: 13px;
  border-radius: var(--radius-sm);
}
.btn-lg {
  padding: 14px 28px;
  font-size: 16px;
  border-radius: var(--radius-lg);
}
.btn-xl {
  padding: 16px 36px;
  font-size: 18px;
  border-radius: var(--radius-lg);
}

/* Icon only */
.btn-icon {
  width: 40px;
  height: 40px;
  padding: 0;
  border-radius: var(--radius-md);
}
.btn-icon.btn-sm {
  width: 32px;
  height: 32px;
}
.btn-icon.btn-lg {
  width: 48px;
  height: 48px;
}

/* Button loading */
.btn.is-loading {
  color: transparent;
  pointer-events: none;
}
.btn.is-loading::after {
  content: '';
  position: absolute;
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255,255,255,0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}
.btn-outline.is-loading::after,
.btn-ghost.is-loading::after {
  border-color: rgba(0,0,0,0.15);
  border-top-color: var(--color-primary);
}

/* Button group */
.btn-group {
  display: inline-flex;
}
.btn-group .btn {
  border-radius: 0;
}
.btn-group .btn:first-child {
  border-radius: var(--radius-md) 0 0 var(--radius-md);
}
.btn-group .btn:last-child {
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}
.btn-group .btn + .btn {
  margin-left: -1px;
}

/* BEM double-dash aliases (used in some templates) */
.btn--primary   { background: var(--color-primary); color: #fff; }
.btn--primary:hover { background: var(--color-primary-dark); color: #fff; }
.btn--outline   { background: transparent; border-color: var(--color-border); color: var(--color-text); }
.btn--outline:hover { border-color: var(--color-primary); color: var(--color-primary); background: var(--color-primary-light); }
.btn--ghost     { background: transparent; color: var(--color-text-secondary); }
.btn--ghost:hover { background: var(--color-bg); color: var(--color-text); box-shadow: none; transform: none; }
.btn--danger    { background: var(--color-danger, #dc3545); color: #fff; }
.btn--danger:hover { background: #c82333; color: #fff; }
.btn--sm        { padding: 6px 14px; font-size: 13px; border-radius: var(--radius-sm); }
.btn--lg        { padding: 14px 28px; font-size: 16px; border-radius: var(--radius-lg); }

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