/* 全局样式 */
:root {
    --primary-color: #4f46e5;
    --primary-hover: #4338ca;
    --secondary-color: #6b7280;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --info-color: #3b82f6;
    --light-color: #f3f4f6;
    --dark-color: #1f2937;
    --white-color: #ffffff;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --border-radius: 0.5rem;
    --border-radius-lg: 1rem;
    --transition: all 0.3s ease;
}

* {
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 16px;
    line-height: 1.5;
    color: var(--dark-color);
    background-color: #f9fafb;
}

/* 渐变背景 */
.bg-gradient-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-hover) 100%);
}

/* 登录卡片样式 */
.login-card {
    background-color: var(--white-color);
    transition: var(--transition);
}

.login-card:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-2px);
}

.login-header {
    position: relative;
    overflow: hidden;
}

.login-header::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    animation: rotate 20s linear infinite;
}

@keyframes rotate {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.login-header h2, .login-header p {
    position: relative;
    z-index: 1;
}

/* 表单样式 */
.form-control {
    border: 1px solid #e5e7eb;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
    outline: none;
}

.input-group-text {
    background-color: var(--light-color);
    border: 1px solid #e5e7eb;
    border-right: none;
    border-radius: var(--border-radius) 0 0 var(--border-radius);
    color: var(--secondary-color);
}

.input-group .form-control {
    border-left: none;
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
}

/* 按钮样式 */
.btn {
    border-radius: var(--border-radius);
    transition: var(--transition);
    font-weight: 500;
    padding: 0.5rem 1rem;
}

.btn-primary {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    border-color: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-lg {
    padding: 0.75rem 1.5rem;
    font-size: 1.125rem;
}

/* 抽奖卡片样式 */
.lottery-card {
    background-color: var(--white-color);
    transition: var(--transition);
}

.lottery-card:hover {
    box-shadow: var(--shadow-xl);
    transform: translateY(-2px);
}

.lottery-header {
    position: relative;
    overflow: hidden;
}

.lottery-header::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 0%, transparent 70%);
    animation: rotate 20s linear infinite;
}

.lottery-header h2, .lottery-header p {
    position: relative;
    z-index: 1;
}

/* 抽奖按钮动画 */
.lottery-btn {
    position: relative;
    overflow: hidden;
}

.lottery-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: all 0.5s ease;
}

.lottery-btn:hover::before {
    left: 100%;
}

/* 中奖结果样式 */
.winning-result {
    animation: bounceIn 0.6s ease;
}

@keyframes bounceIn {
    0% { transform: scale(0.3); opacity: 0; }
    50% { transform: scale(1.05); }
    70% { transform: scale(0.9); }
    100% { transform: scale(1); opacity: 1; }
}

.winning-icon {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); }
}

/* 卡片样式 */
.card {
    border: none;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.card:hover {
    box-shadow: var(--shadow-lg);
}

.card-header {
    border-bottom: 1px solid #e5e7eb;
    background-color: var(--white-color);
    border-radius: var(--border-radius-lg) var(--border-radius-lg) 0 0 !important;
}

/* 表格样式 */
.table {
    margin-bottom: 0;
}

.table th {
    background-color: var(--light-color);
    font-weight: 600;
    color: var(--dark-color);
    border-top: none;
    border-bottom: 2px solid #e5e7eb;
}

.table td {
    border-top: 1px solid #e5e7eb;
    vertical-align: middle;
}

.table-hover tbody tr:hover {
    background-color: rgba(79, 70, 229, 0.05);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .login-card, .lottery-card {
        margin: 0 1rem;
    }
    
    .container {
        padding: 0 1rem;
    }
    
    .login-body, .lottery-body {
        padding: 2rem;
    }
}

@media (max-width: 576px) {
    .login-body, .lottery-body {
        padding: 1.5rem;
    }
    
    h1, h2, h3 {
        font-size: 1.5rem;
    }
    
    .btn-lg {
        font-size: 1rem;
        padding: 0.625rem 1.25rem;
    }
}

/* 加载动画 */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(79, 70, 229, 0.3);
    border-radius: 50%;
    border-top-color: var(--primary-color);
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* 消息提示样式 */
.alert {
    border: none;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
}

.alert-danger {
    background-color: #fee2e2;
    color: #991b1b;
}

.alert-success {
    background-color: #d1fae5;
    color: #065f46;
}

.alert-info {
    background-color: #dbeafe;
    color: #1e40af;
}

.alert-warning {
    background-color: #fef3c7;
    color: #92400e;
}

/* 输入框聚焦效果 */
.form-control:focus {
    transition: all 0.2s ease;
}

/* 按钮禁用状态 */
.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* 页脚样式 */
footer {
    font-size: 0.875rem;
}

/* 图标样式 */
.fa {
    transition: var(--transition);
}

.btn .fa {
    margin-right: 0.5rem;
}

/* 动画效果 */
.fade-in {
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--light-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #94a3b8;
}