.btn-group,
.theme-switch {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 16px 0;
}

button,
.btn {
  padding: 16px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--btn-bg);
  color: var(--text);
  cursor: pointer;
  transition: var(--transition);
  font-size: 14px;
  min-width: 80px;
  text-align: center;
  vertical-align: middle;
}

button:hover,
.btn:hover {
  background: var(--btn-hover);
}

button:active,
.btn:active {
  transform: scale(0.98);
}

.btn-main {
  background: var(--main);
  color: #fff;
  border-color: var(--main);
}

.btn-main:hover {
  opacity: 0.9;
  background: var(--main);
}

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

.btn-success:hover {
  opacity: 0.9;
  background: var(--success);
}

.btn-warning {
  background: var(--warning);
  color: #fff;
  border-color: var(--warning);
}

.btn-warning:hover {
  opacity: 0.9;
  background: var(--warning);
}

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

.btn-danger:hover {
  opacity: 0.9;
  background: var(--danger);
}

.btn-disabled,
button:disabled,
.btn:disabled {
  cursor: not-allowed;
  opacity: 0.6;
  pointer-events: none;
}

.btn-loading {
  position: relative;
  pointer-events: none;
}

.btn-loading::after {
  content: "";
  position: absolute;
  width: 14px;
  height: 14px;
  border: 2px solid transparent;
  border-top-color: currentColor;
  border-radius: 50%;
  animation: spin-btn 1s linear infinite;
  right: 8px;
  top: 50%;
  transform: translateY(-50%) rotate(0deg);
}

input,
select,
textarea {
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--bg);
  color: var(--text);
  margin: 6px 0;
  width: 100%;
  max-width: 400px;
  font-size: 14px;
  transition: var(--transition);
}

input:focus,
select:focus,
textarea:focus {
  outline: none;
  border-color: var(--main);
  box-shadow: 0 0 0 2px rgba(0, 122, 255, 0.1);
}

input::placeholder,
textarea::placeholder {
  color: var(--text-placeholder);
}

textarea {
  min-height: 80px;
  resize: vertical;
}

label {
  margin-right: 10px;
}

.form-item {
  margin: 16px 0;
}

.form-label {
  display: block;
  margin-bottom: 6px;
  font-weight: 500;
}

.form-row {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: flex-end;
}

.switch {
  position: relative;
  display: inline-block;
  width: 44px;
  height: 24px;
  margin: 6px 0;
}

.switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.slider {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--border);
  border-radius: 24px;
  transition: var(--transition);
  cursor: pointer;
}

.slider:before {
  position: absolute;
  content: "";
  height: 18px;
  width: 18px;
  left: 3px;
  bottom: 3px;
  background: white;
  border-radius: 50%;
  transition: var(--transition);
}

input:checked+.slider {
  background: var(--main);
}

input:checked+.slider:before {
  transform: translateX(20px);
}

.slider-wrapper {
  width: 100%;
  max-width: 300px;
  height: 16px;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding: 0;
}

.slider-input {
  -webkit-appearance: none;
  width: calc(100% + 16px);
  height: 6px;
  background: linear-gradient(to right, var(--main) 0%, var(--main) var(--progress, 50%), var(--border) var(--progress, 50%), var(--border) 100%);
  border-radius: 3px;
  outline: none;
  margin: 0 -8px;
  padding: 0;
  transition: background .15s ease;
}

.slider-input::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--main);
  cursor: pointer;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
  transition: transform .15s ease, box-shadow .15s ease;
}

.slider-input::-webkit-slider-thumb:hover {
  transform: scale(1.2);
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
}

.slider-input::-webkit-slider-thumb:active {
  transform: scale(1.1);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.25);
}

.slider-input:focus-visible::-webkit-slider-thumb {
  outline: 2px solid var(--main);
  outline-offset: 4px;
}

.slider-input::-moz-range-thumb {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--main);
  cursor: pointer;
  border: none;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.2);
  transition: transform .15s ease, box-shadow .15s ease;
}

.slider-input::-moz-range-thumb:hover {
  transform: scale(1.2);
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
}

.slider-input::-moz-range-thumb:active {
  transform: scale(1.1);
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.25);
}

.radio-item {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  margin: 8px 0;
  height: 24px;
}

.radio-item input[type="radio"] {
  appearance: none;
  width: 24px;
  height: 24px;
  border: 2px solid var(--border);
  border-radius: 50%;
  background: var(--bg);
  position: relative;
  transition: border-color .2s ease, background .2s ease;
  margin: 0;
  cursor: pointer;
}

.radio-item input[type="radio"]:hover {
  border-color: var(--main);
}

.radio-item input[type="radio"]:checked {
  border-color: var(--main);
  background: var(--main);
}

.radio-item input[type="radio"]::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0);
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--check-color);
  opacity: 0;
  transition: transform .2s ease, opacity .2s ease;
}

.radio-item input[type="radio"]:checked::after {
  transform: translate(-50%, -50%) scale(1);
  opacity: 1;
}

.radio-item label {
  cursor: pointer;
  user-select: none;
}

.checkbox-item {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  margin: 8px 0;
}

.checkbox-item input[type="checkbox"] {
  appearance: none;
  width: 20px;
  height: 20px;
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg);
  position: relative;
  transition: border-color .2s ease, background .2s ease, border-radius .2s ease;
  margin: 0;
  cursor: pointer;
}

.checkbox-item input[type="checkbox"]:hover {
  border-color: var(--main);
  border-radius: 50%;
}

.checkbox-item input[type="checkbox"]:checked {
  border-color: var(--main);
  background: var(--main);
}

.checkbox-item input[type="checkbox"]::after {
  content: "✓";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0);
  color: var(--check-color);
  font-size: 14px;
  font-weight: bold;
  opacity: 0;
  transition: transform .2s ease, opacity .2s ease;
}

.checkbox-item input[type="checkbox"]:checked::after {
  transform: translate(-50%, -50%) scale(1);
  opacity: 1;
}

.checkbox-item label {
  cursor: pointer;
  user-select: none;
}

.rate {
  color: var(--warning);
  font-size: 20px;
}

.rate input {
  display: none;
}

.rate label {
  cursor: pointer;
  margin: 0 2px;
}

.rate label:hover,
.rate label:hover~label {
  color: var(--warning);
}

.rate input:checked~label {
  color: var(--warning);
}

.captcha-container {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 16px 0;
  flex-wrap: wrap;
}

.captcha-box {
  width: 120px;
  height: 44px;
  background: var(--block-bg);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  font-weight: bold;
  letter-spacing: 4px;
  user-select: none;
  cursor: pointer;
  border: 1px solid var(--border);
  transition: var(--transition);
}

.captcha-box:hover {
  border-color: var(--main);
  box-shadow: 0 0 8px rgba(0, 122, 255, 0.2);
}

.captcha-input {
  max-width: 150px !important;
}

.captcha-refresh {
  background: none;
  border: none;
  color: var(--text-sub);
  cursor: pointer;
  font-size: 16px;
  padding: 4px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  min-width: auto;
}

.captcha-refresh:hover {
  color: var(--main);
  background: rgba(0, 122, 255, 0.1);
}

.captcha-error {
  border-color: var(--danger) !important;
  box-shadow: 0 0 0 2px rgba(255, 77, 79, 0.1) !important;
}

.captcha-success {
  border-color: var(--success) !important;
  box-shadow: 0 0 0 2px rgba(76, 175, 80, 0.1) !important;
}

@keyframes spin-btn {
  from {
    transform: translateY(-50%) rotate(0deg);
  }
  to {
    transform: translateY(-50%) rotate(360deg);
  }
}