/* 全局样式 */
:root {
    --primary-color: #ff6b6b;
    --secondary-color: #ffd93d;
    --text-primary: #333;
    --text-secondary: #666;
    --text-light: #999;
    --bg-white: #ffffff;
    --bg-gray: #f5f5f5;
    --border-color: #e0e0e0;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.2);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    width: 100%;
    height: 100%;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 16px;
    color: var(--text-primary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    background: var(--primary-color);
    overflow-x: hidden;
}

/* 容器 */
.page-container {
    min-height: 100vh;
    padding: 20px;
    display: flex;
    flex-direction: column;
}

.content-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--shadow-md);
    margin-bottom: 16px;
}

/* 按钮 */
.btn {
    display: block;
    width: 100%;
    padding: 16px;
    border: none;
    border-radius: var(--radius-md);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    text-align: center;
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
}

.btn-primary:active {
    transform: scale(0.98);
    opacity: 0.9;
}

.btn-secondary {
    background: var(--bg-gray);
    color: var(--text-primary);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
}

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

/* 输入框 */
.input-group {
    margin-bottom: 16px;
}

.input-label {
    display: block;
    margin-bottom: 8px;
    font-size: 14px;
    color: var(--text-secondary);
}

.input {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 16px;
    outline: none;
    transition: border-color 0.3s;
}

.input:focus {
    border-color: var(--primary-color);
}

.textarea {
    min-height: 120px;
    resize: vertical;
    font-family: inherit;
}

/* 加载状态 */
.loading {
    text-align: center;
    padding: 40px 20px;
    color: var(--text-secondary);
}

.loading::after {
    content: '...';
    animation: dots 1.5s steps(3, end) infinite;
}

@keyframes dots {
    0%, 20% { content: '.'; }
    40% { content: '..'; }
    60%, 100% { content: '...'; }
}

/* 空状态 */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-secondary);
}

.empty-state-icon {
    font-size: 48px;
    margin-bottom: 16px;
    opacity: 0.5;
}

.empty-state-text {
    font-size: 14px;
    margin-bottom: 20px;
}

/* 列表 */
.list-item {
    padding: 16px;
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
    transition: background 0.2s;
}

.list-item:last-child {
    border-bottom: none;
}

.list-item:active {
    background: var(--bg-gray);
}

/* 标签 */
.tag {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
}

.tag-success {
    background: #d4edda;
    color: #155724;
}

.tag-warning {
    background: #fff3cd;
    color: #856404;
}

.tag-danger {
    background: #f8d7da;
    color: #721c24;
}

/* 模态框 */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    z-index: 9999;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.modal.show {
    display: flex;
}

.modal-content {
    background: white;
    border-radius: var(--radius-lg);
    padding: 24px;
    max-width: 400px;
    width: 100%;
    box-shadow: var(--shadow-lg);
    animation: modalIn 0.3s;
}

@keyframes modalIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.modal-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 12px;
}

.modal-body {
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.modal-footer {
    display: flex;
    gap: 12px;
}

.modal-footer .btn {
    flex: 1;
}

/* 工具类 */
.text-center {
    text-align: center;
}

.text-primary {
    color: var(--primary-color);
}

.text-secondary {
    color: var(--text-secondary);
}

.mb-8 {
    margin-bottom: 8px;
}

.mb-16 {
    margin-bottom: 16px;
}

.mb-24 {
    margin-bottom: 24px;
}

.mt-16 {
    margin-top: 16px;
}

.mt-24 {
    margin-top: 24px;
}

.hidden {
    display: none !important;
}