/**
 * 按钮组件样式
 * 迷幻主题的按钮设计系统
 */

/* 基础按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    line-height: 1;
    white-space: nowrap;
    user-select: none;
}

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

/* 主要按钮 */
.btn-primary {
    background: linear-gradient(45deg, #ff1744, #e91e63);
    color: white;
    border: 1px solid transparent;
    box-shadow: 
        0 4px 15px rgba(255, 23, 68, 0.3),
        inset 0 1px rgba(255, 255, 255, 0.2);
}

.btn-primary:hover {
    background: linear-gradient(45deg, #d50000, #c2185b);
    transform: translateY(-2px);
    box-shadow: 
        0 6px 20px rgba(255, 23, 68, 0.4),
        inset 0 1px rgba(255, 255, 255, 0.3);
}

.btn-primary:active {
    transform: translateY(0);
    box-shadow: 
        0 2px 10px rgba(255, 23, 68, 0.3),
        inset 0 2px rgba(0, 0, 0, 0.1);
}

/* 次要按钮 */
.btn-secondary {
    background: linear-gradient(45deg, #9c27b0, #673ab7);
    color: white;
    border: 1px solid transparent;
    box-shadow: 
        0 4px 15px rgba(156, 39, 176, 0.3),
        inset 0 1px rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
    background: linear-gradient(45deg, #7b1fa2, #512da8);
    transform: translateY(-2px);
    box-shadow: 
        0 6px 20px rgba(156, 39, 176, 0.4),
        inset 0 1px rgba(255, 255, 255, 0.3);
}

/* VIP按钮 */
.btn-vip {
    background: linear-gradient(45deg, #ff6f00, #ffab00);
    color: white;
    border: 1px solid transparent;
    box-shadow: 
        0 4px 15px rgba(255, 111, 0, 0.3),
        inset 0 1px rgba(255, 255, 255, 0.2);
    position: relative;
}

.btn-vip::before {
    content: '👑';
    margin-right: 8px;
}

.btn-vip:hover {
    background: linear-gradient(45deg, #e65100, #f57c00);
    transform: translateY(-2px);
    box-shadow: 
        0 6px 20px rgba(255, 111, 0, 0.4),
        inset 0 1px rgba(255, 255, 255, 0.3);
}

/* 轮廓按钮 */
.btn-outline {
    background: transparent;
    color: #ff1744;
    border: 2px solid #ff1744;
    box-shadow: none;
}

.btn-outline:hover {
    background: #ff1744;
    color: white;
    transform: translateY(-2px);
    box-shadow: 
        0 6px 20px rgba(255, 23, 68, 0.3),
        inset 0 1px rgba(255, 255, 255, 0.2);
}

/* 幽灵按钮 */
.btn-ghost {
    background: rgba(255, 255, 255, 0.1);
    color: #ffc1cc;
    border: 1px solid rgba(255, 192, 204, 0.3);
    backdrop-filter: blur(10px);
}

.btn-ghost:hover {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border-color: rgba(255, 192, 204, 0.5);
    transform: translateY(-2px);
}

/* 危险按钮 */
.btn-danger {
    background: linear-gradient(45deg, #d32f2f, #c62828);
    color: white;
    border: 1px solid transparent;
}

.btn-danger:hover {
    background: linear-gradient(45deg, #b71c1c, #a01e1e);
    transform: translateY(-2px);
}

/* 成功按钮 */
.btn-success {
    background: linear-gradient(45deg, #388e3c, #2e7d32);
    color: white;
    border: 1px solid transparent;
}

.btn-success:hover {
    background: linear-gradient(45deg, #2e7d32, #1b5e20);
    transform: translateY(-2px);
}

/* 按钮尺寸变体 */
.btn-sm {
    padding: 8px 16px;
    font-size: 12px;
    border-radius: 6px;
}

.btn-lg {
    padding: 16px 32px;
    font-size: 16px;
    border-radius: 12px;
}

.btn-xl {
    padding: 20px 40px;
    font-size: 18px;
    border-radius: 15px;
}

/* 全宽按钮 */
.btn-block {
    width: 100%;
    display: flex;
}

/* 圆形按钮 */
.btn-circle {
    border-radius: 50%;
    width: 48px;
    height: 48px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-circle.btn-sm {
    width: 32px;
    height: 32px;
}

.btn-circle.btn-lg {
    width: 64px;
    height: 64px;
}

/* 按钮图标 */
.btn-icon {
    padding: 12px;
    min-width: auto;
}

.btn .icon {
    margin-right: 8px;
    font-size: 1.1em;
}

.btn .icon:last-child {
    margin-right: 0;
    margin-left: 8px;
}

.btn-icon .icon {
    margin: 0;
}

/* 按钮组 */
.btn-group {
    display: inline-flex;
    vertical-align: middle;
}

.btn-group .btn {
    border-radius: 0;
    margin: 0;
    border-right: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-group .btn:first-child {
    border-top-left-radius: 8px;
    border-bottom-left-radius: 8px;
}

.btn-group .btn:last-child {
    border-top-right-radius: 8px;
    border-bottom-right-radius: 8px;
    border-right: none;
}

.btn-group .btn:hover {
    z-index: 1;
}

/* 特殊效果按钮 */
.btn-glow {
    box-shadow: 
        0 0 20px rgba(255, 23, 68, 0.5),
        0 4px 15px rgba(255, 23, 68, 0.3);
    animation: btn-glow-pulse 2s ease-in-out infinite alternate;
}

@keyframes btn-glow-pulse {
    0% {
        box-shadow: 
            0 0 20px rgba(255, 23, 68, 0.5),
            0 4px 15px rgba(255, 23, 68, 0.3);
    }
    100% {
        box-shadow: 
            0 0 30px rgba(255, 23, 68, 0.7),
            0 6px 25px rgba(255, 23, 68, 0.4);
    }
}

/* 渐变动画按钮 */
.btn-gradient-animated {
    background: linear-gradient(45deg, #ff1744, #e91e63, #9c27b0, #673ab7);
    background-size: 300% 300%;
    animation: btn-gradient-shift 3s ease infinite;
}

@keyframes btn-gradient-shift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* 波纹效果 */
.btn-ripple {
    position: relative;
    overflow: hidden;
}

.btn-ripple::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn-ripple:active::after {
    width: 300px;
    height: 300px;
}

/* 加载状态 */
.btn-loading {
    position: relative;
    color: transparent;
    pointer-events: none;
}

.btn-loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top: 2px solid white;
    border-radius: 50%;
    transform: translate(-50%, -50%);
    animation: btn-loading-spin 1s linear infinite;
}

@keyframes btn-loading-spin {
    0% { transform: translate(-50%, -50%) rotate(0deg); }
    100% { transform: translate(-50%, -50%) rotate(360deg); }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .btn {
        padding: 10px 20px;
        font-size: 13px;
    }
    
    .btn-lg {
        padding: 14px 28px;
        font-size: 15px;
    }
    
    .btn-xl {
        padding: 18px 36px;
        font-size: 16px;
    }
}

@media (max-width: 480px) {
    .btn {
        padding: 8px 16px;
        font-size: 12px;
    }
    
    .btn-group {
        flex-direction: column;
        width: 100%;
    }
    
    .btn-group .btn {
        border-radius: 0;
        border-right: none;
        border-bottom: 1px solid rgba(255, 255, 255, 0.2);
        margin-bottom: -1px;
    }
    
    .btn-group .btn:first-child {
        border-top-left-radius: 8px;
        border-top-right-radius: 8px;
        border-bottom-left-radius: 0;
    }
    
    .btn-group .btn:last-child {
        border-bottom-left-radius: 8px;
        border-bottom-right-radius: 8px;
        border-top-right-radius: 0;
        border-bottom: none;
    }
}