/**
 * 按钮组件公共样式
 * 统一按钮外观，使用 CSS 变量
 * 各页面只需引入此文件即可使用统一的按钮样式
 */

/* 基础按钮 - 透明风格，具体变体定义背景色 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 16px;
    border: none;
    border-radius: var(--radius-base, 6px);
    font-size: var(--font-base, 14px);
    line-height: 1.5;
    cursor: pointer;
    transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
    white-space: nowrap;
    user-select: none;
    outline: none;
    box-shadow: none;
    text-decoration: none;
    background: transparent;
    color: var(--text-regular, #4E5969);
}

.btn:hover:not(:disabled) {
    background: var(--bg-hover, #F7F8FA);
    outline: none;
    box-shadow: none;
}

.btn:active:not(:disabled) {
    background: var(--bg-active, #F2F3F5);
    outline: none;
    box-shadow: none;
}

button.btn:focus,
button.btn:focus-visible,
button.btn:active {
    outline: none !important;
    box-shadow: none !important;
    border: none;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* 主要按钮 - 无边框样式，保留颜色变化，去掉外框/阴影 */
.btn-primary {
    background: var(--color-primary, #667eea);
    color: var(--text-inverse, #fff);
    box-shadow: none;
    border: none;
    outline: none;
}

.btn-primary:hover:not(:disabled) {
    background: var(--color-primary-hover, #5a6fd6);
    color: var(--text-inverse, #fff);
    box-shadow: none;
    border: none;
    outline: none;
}

.btn-primary:active:not(:disabled) {
    background: var(--color-primary-hover, #5a6fd6);
    box-shadow: none;
    border: none;
    outline: none;
}

.btn-primary:focus,
.btn-primary:focus-visible {
    outline: none !important;
    box-shadow: none !important;
    border: none !important;
}

.btn-success {
    background: var(--color-success, #00B42A);
    color: var(--text-inverse, #fff);
    box-shadow: none;
    border: none;
    outline: none;
}

.btn-success:hover:not(:disabled) {
    background: var(--color-success-dark, #009A22);
    color: var(--text-inverse, #fff);
    box-shadow: none;
    border: none;
    outline: none;
}

.btn-success:focus,
.btn-success:focus-visible {
    outline: none !important;
    box-shadow: none !important;
    border: none !important;
}

.btn-warning {
    background: var(--color-warning, #FF9900);
    color: var(--text-inverse, #fff);
    box-shadow: none;
    border: none;
    outline: none;
}

.btn-warning:hover:not(:disabled) {
    background: var(--color-orange-dark, #D46B08);
    color: var(--text-inverse, #fff);
    box-shadow: none;
    border: none;
    outline: none;
}

.btn-warning:focus,
.btn-warning:focus-visible {
    outline: none !important;
    box-shadow: none !important;
    border: none !important;
}

.btn-danger {
    background: var(--color-error, #F53F3F);
    color: var(--text-inverse, #fff);
    box-shadow: none;
    border: none;
    outline: none;
}

.btn-danger:hover:not(:disabled) {
    background: var(--color-error-dark, #D91906);
    color: var(--text-inverse, #fff);
    box-shadow: none;
    border: none;
    outline: none;
}

.btn-danger:focus,
.btn-danger:focus-visible {
    outline: none !important;
    box-shadow: none !important;
    border: none !important;
}

.btn-info {
    background: var(--color-info, #165DFF);
    color: var(--text-inverse, #fff);
    box-shadow: none;
    border: none;
    outline: none;
}

.btn-info:hover:not(:disabled) {
    background: var(--color-info-hover, #3B7AE8);
    color: var(--text-inverse, #fff);
    box-shadow: none;
    border: none;
    outline: none;
}

.btn-info:focus,
.btn-info:focus-visible {
    outline: none !important;
    box-shadow: none !important;
    border: none !important;
}

.btn-default {
    background: var(--bg-card, #fff);
    color: var(--text-regular, #4e5969);
    border: none;
    outline: none;
    box-shadow: none;
}

.btn-default:hover:not(:disabled) {
    color: var(--color-primary, #667eea);
    background: var(--bg-hover, #f7f8fa);
    outline: none;
    box-shadow: none;
    border: none;
}

.btn-secondary {
    background: var(--bg-active, #F2F3F5);
    color: var(--text-regular, #4E5969);
    border: none;
    outline: none;
    box-shadow: none;
}

.btn-secondary:hover:not(:disabled) {
    background: var(--border-base, #E5E6EB);
    color: var(--text-regular, #4E5969);
    outline: none;
    box-shadow: none;
    border: none;
}

.btn-text {
    background: transparent;
    border: none;
    outline: none;
    box-shadow: none;
    color: var(--color-primary, #667eea);
    padding: 4px 8px;
}

.btn-text:hover:not(:disabled) {
    background: var(--color-primary-bg, rgba(102, 126, 234, 0.1));
    outline: none;
    box-shadow: none;
    border: none;
}

.btn-outline {
    background: var(--bg-active, #F2F3F5);
    border: none;
    outline: none;
    box-shadow: none;
    color: var(--text-regular, #4e5969);
}

.btn-outline:hover:not(:disabled) {
    color: var(--color-primary, #667eea);
    background: var(--color-primary-bg, rgba(102, 126, 234, 0.05));
    outline: none;
    box-shadow: none;
    border: none;
}

.btn-sm {
    padding: 4px 12px;
    font-size: var(--font-sm, 13px);
    border-radius: var(--radius-sm, 4px);
}

.btn-lg {
    padding: 12px 24px;
    font-size: var(--font-lg, 16px);
    border-radius: var(--radius-md, 8px);
}

.btn-lg.btn-primary {
    box-shadow: none;
    border: none;
    outline: none;
}

.btn-lg.btn-primary:hover:not(:disabled) {
    box-shadow: none;
    border: none;
    outline: none;
}

.btn-block {
    display: flex;
    width: 100%;
}

.btn-group {
    display: inline-flex;
    flex-wrap: wrap;
    gap: 8px;
}

.btn-group .btn {
    margin-right: 0;
    flex-shrink: 0;
}

.btn-group .btn + .btn {
    margin-left: 0;
}