/* ============================================
   KaufEinHorn Button System
   BEM-Syntax: ke-btn ke-btn--{variant}
   ============================================ */

/* --- Basis-Button --- */
.ke-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--ke-space-2, 6px);
  padding: 6px 12px;
  min-height: 36px;
  font-family: var(--ke-font-family, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif);
  font-size: var(--ke-font, 14px);
  font-weight: var(--ke-weight-medium, 500);
  line-height: var(--ke-line-tight, 1.2);
  color: var(--ke-text);
  background: var(--ke-surface-2);
  border: 1px solid var(--ke-border);
  border-radius: var(--ke-radius-sm, 4px);
  cursor: pointer;
  text-decoration: none;
  white-space: nowrap;
  flex-shrink: 0;
  width: auto;
  transition: background-color var(--ke-transition, 0.18s) ease,
              border-color var(--ke-transition, 0.18s) ease,
              box-shadow var(--ke-transition, 0.18s) ease,
              transform 0.05s ease;
  -webkit-tap-highlight-color: transparent;
  user-select: none;
}
.ke-btn:hover { filter: brightness(1.06); }
.ke-btn:active { transform: translateY(1px); }
.ke-btn:disabled { opacity: 0.5; cursor: not-allowed; pointer-events: none; }
.ke-btn:focus { outline: 2px solid var(--ke-primary-focus); outline-offset: 2px; }

/* --- Farben --- */
.ke-btn--primary {
  background: var(--ke-primary);
  border-color: var(--ke-primary);
  color: #fff;
}
.ke-btn--primary:hover { background: var(--ke-primary-600); border-color: var(--ke-primary-600); }

.ke-btn--success {
  background: var(--ke-success);
  border-color: var(--ke-success);
  color: #fff;
}
.ke-btn--success:hover { background: var(--ke-success-600); border-color: var(--ke-success-600); }

.ke-btn--danger {
  background: var(--ke-danger);
  border-color: var(--ke-danger);
  color: #fff;
}
.ke-btn--danger:hover { background: var(--ke-danger-600); border-color: var(--ke-danger-600); }

.ke-btn--warning {
  background: var(--ke-warning);
  border-color: var(--ke-warning);
  color: #111;
}
.ke-btn--warning:hover { filter: brightness(0.95); }

.ke-btn--secondary {
  background: var(--ke-surface-2);
  border-color: var(--ke-border);
  color: var(--ke-text);
}
.ke-btn--secondary:hover { background: var(--ke-border); }

.ke-btn--info {
  background: var(--color-secondary-light);
  color: var(--color-secondary);
  border-color: var(--color-secondary);
}
.ke-btn--info:hover { background: rgba(100, 181, 246, 0.2); }

.ke-btn--ghost {
  background: transparent;
  border-color: transparent;
  color: var(--ke-text-muted);
}
.ke-btn--ghost:hover { background: var(--ke-surface-2); color: var(--ke-text); }

.ke-btn--outline {
  background: transparent;
  border-color: var(--ke-border);
  color: var(--ke-text);
}
.ke-btn--outline:hover { background: var(--ke-surface-2); }

.ke-btn--link {
  background: none;
  border: none;
  color: var(--ke-text-muted);
  padding: 4px 0;
  font-size: 0.9rem;
  width: 100%;
  text-align: left;
  cursor: pointer;
}
.ke-btn--link:hover { color: var(--ke-text); }

/* --- Größen --- */
.ke-btn--xs {
  padding: 4px 8px;
  min-height: 24px;
  font-size: var(--ke-font-xs, 11px);
  border-radius: var(--ke-radius-sm, 4px);
}

.ke-btn--sm {
  padding: 4px 8px;
  min-height: 30px;
  font-size: var(--ke-font-sm, 12px);
}

.ke-btn--lg {
  padding: 10px 16px;
  min-height: 44px;
  font-size: var(--ke-font-lg, 16px);
}

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

.ke-btn--icon {
  width: 28px;
  height: 28px;
  padding: 0;
  min-height: auto;
  font-size: 18px;
  border-radius: 50%;
  background: none;
  border: none;
  color: var(--ke-text);
}
.ke-btn--icon:hover { background: rgba(255,255,255,0.08); }
[data-theme="light"] .ke-btn--icon:hover { background: rgba(0,0,0,0.06); }

.ke-btn--rounded { border-radius: var(--ke-radius-full, 9999px); }

/* --- Button Group --- */
.ke-btn-group {
  display: inline-flex;
  flex-wrap: wrap;
  gap: var(--ke-space-2, 8px);
  align-items: center;
}

/* ============================================
   FLAT SYNTAX ALIASE (deprecated)
   Nur für Migration — nachher entfernen!
   ============================================ */
.ke-btn-primary,
.ke-btn-success,
.ke-btn-danger,
.ke-btn-warning,
.ke-btn-secondary,
.ke-btn-ghost,
.ke-btn-outline,
.ke-btn-sm,
.ke-btn-lg,
.ke-btn-full,
.ke-btn-icon {
  /* These are kept as aliases. After all templates use BEM, remove these. */
}

/* Re-apply flat aliases → BEM */
.ke-btn-primary { background: var(--ke-primary); border-color: var(--ke-primary); color: #fff; }
.ke-btn-primary:hover { background: var(--ke-primary-600); border-color: var(--ke-primary-600); }

.ke-btn-success { background: var(--ke-success); border-color: var(--ke-success); color: #fff; }
.ke-btn-success:hover { background: var(--ke-success-600); border-color: var(--ke-success-600); }

.ke-btn-danger { background: var(--ke-danger); border-color: var(--ke-danger); color: #fff; }
.ke-btn-danger:hover { background: var(--ke-danger-600); border-color: var(--ke-danger-600); }

.ke-btn-warning { background: var(--ke-warning); border-color: var(--ke-warning); color: #111; }
.ke-btn-warning:hover { filter: brightness(0.95); }

.ke-btn-secondary { background: var(--ke-surface-2); border-color: var(--ke-border); color: var(--ke-text); }
.ke-btn-secondary:hover { background: var(--ke-border); }

.ke-btn-info { background: var(--color-secondary-light); color: var(--color-secondary); border-color: var(--color-secondary); }
.ke-btn-info:hover { background: rgba(100, 181, 246, 0.2); }

.ke-btn-ghost { background: transparent; border-color: transparent; color: var(--ke-text-muted); }
.ke-btn-ghost:hover { background: var(--ke-surface-2); color: var(--ke-text); }

.ke-btn-outline { background: transparent; border-color: var(--ke-border); color: var(--ke-text); }
.ke-btn-outline:hover { background: var(--ke-surface-2); }

.ke-btn-sm { padding: 4px 8px; font-size: var(--ke-font-sm, 12px); }
.ke-btn-lg { padding: 10px 14px; font-size: var(--ke-font-lg, 16px); }
.ke-btn-full { width: 100%; }

.ke-btn-icon {
  width: 28px; height: 28px; padding: 0; font-size: 18px;
  border-radius: 50%; background: none; border: none; color: var(--ke-text);
  display: inline-flex; align-items: center; justify-content: center;
}
.ke-btn-icon:hover { background: rgba(255,255,255,0.08); }
[data-theme="light"] .ke-btn-icon:hover { background: rgba(0,0,0,0.06); }