/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #07c160;
    --primary-dark: #06ad56;
    --secondary: #576b95;
    --bg: #f5f5f5;
    --card-bg: #ffffff;
    --text: #333333;
    --text-light: #666666;
    --border: #e5e5e5;
    --shadow: 0 2px 8px rgba(0,0,0,0.08);
    --radius: 8px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
}

/* 登录页面 */
.auth-page {
    background: linear-gradient(135deg, #07c160 0%, #029f47 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.auth-container {
    width: 100%;
    max-width: 420px;
    padding: 20px;
}

.auth-box {
    background: white;
    border-radius: 16px;
    padding: 40px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.15);
}

.auth-header {
    text-align: center;
    margin-bottom: 30px;
}

.auth-header h1 {
    font-size: 28px;
    color: var(--primary);
    margin-bottom: 8px;
}

.auth-header p {
    color: var(--text-light);
    font-size: 14px;
}

.auth-tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 24px;
    border-bottom: 2px solid var(--border);
}

.tab-btn {
    flex: 1;
    padding: 12px;
    border: none;
    background: none;
    font-size: 16px;
    cursor: pointer;
    color: var(--text-light);
    position: relative;
    transition: color 0.3s;
}

.tab-btn.active {
    color: var(--primary);
    font-weight: 600;
}

.tab-btn.active::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--primary);
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.auth-form.hidden {
    display: none;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group label {
    font-size: 14px;
    font-weight: 500;
    color: var(--text);
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 12px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-size: 14px;
    transition: border-color 0.3s, box-shadow 0.3s;
    font-family: inherit;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(7, 193, 96, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.required {
    color: #ff4d4f;
}

.btn-primary {
    background: var(--primary);
    color: white;
    border: none;
    padding: 12px 24px;
    border-radius: var(--radius);
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.3s;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn-primary:hover {
    background: var(--primary-dark);
}

.btn-primary:disabled {
    background: #ccc;
    cursor: not-allowed;
}

.btn-secondary {
    background: white;
    color: var(--text);
    border: 1px solid var(--border);
    padding: 8px 16px;
    border-radius: var(--radius);
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s;
}

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

.btn-large {
    padding: 14px 32px;
    font-size: 16px;
}

.default-account {
    text-align: center;
    padding: 12px;
    background: #f0f9f0;
    border-radius: var(--radius);
    font-size: 13px;
    color: var(--text-light);
}

.default-account strong {
    color: var(--primary);
}

.message {
    margin-top: 16px;
    padding: 12px;
    border-radius: var(--radius);
    font-size: 14px;
    text-align: center;
    display: none;
}

.message.show {
    display: block;
}

.message.success {
    background: #f0f9f0;
    color: var(--primary);
    border: 1px solid #b7eb8f;
}

.message.error {
    background: #fff2f0;
    color: #ff4d4f;
    border: 1px solid #ffccc7;
}

/* 应用布局 */
.app-container {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 260px;
    background: var(--card-bg);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    z-index: 100;
}

.sidebar-header {
    padding: 24px 20px;
    border-bottom: 1px solid var(--border);
}

.sidebar-header h2 {
    font-size: 20px;
    color: var(--primary);
}

.sidebar-header .subtitle {
    font-size: 12px;
    color: var(--text-light);
    margin-top: 4px;
}

.sidebar-nav {
    flex: 1;
    padding: 16px 12px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border-radius: var(--radius);
    color: var(--text);
    text-decoration: none;
    font-size: 14px;
    transition: all 0.3s;
    cursor: pointer;
    border: none;
    background: none;
    width: 100%;
}

.nav-item:hover {
    background: #f0f9f0;
    color: var(--primary);
}

.nav-item.active {
    background: #e6f7e6;
    color: var(--primary);
    font-weight: 500;
}

.nav-item .icon {
    font-size: 18px;
}

.sidebar-footer {
    padding: 16px;
    border-top: 1px solid var(--border);
}

.user-info {
    font-size: 14px;
    color: var(--text-light);
    margin-bottom: 12px;
}

.btn-logout {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border);
    background: white;
    border-radius: var(--radius);
    color: var(--text-light);
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s;
}

.btn-logout:hover {
    border-color: #ff4d4f;
    color: #ff4d4f;
}

.main-content {
    flex: 1;
    margin-left: 260px;
    padding: 32px;
    max-width: 900px;
}

/* 页面 */
.page {
    display: none;
}

.page.active {
    display: block;
}

.page-header {
    margin-bottom: 24px;
}

.page-header h1 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 6px;
}

.page-header p {
    color: var(--text-light);
    font-size: 14px;
}

.card {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 24px;
    box-shadow: var(--shadow);
    margin-bottom: 20px;
}

.form-row {
    margin-bottom: 16px;
}

.form-row.two-col {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
    flex-wrap: wrap;
    gap: 12px;
}

.result-header h2 {
    font-size: 20px;
    color: var(--text);
}

.result-actions {
    display: flex;
    gap: 8px;
}

.article-meta {
    display: flex;
    gap: 16px;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
    font-size: 13px;
    color: var(--text-light);
}

.article-content {
    font-size: 15px;
    line-height: 1.8;
    color: var(--text);
    white-space: pre-wrap;
}

.article-content p {
    margin-bottom: 12px;
}

/* 历史列表 */
.history-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.history-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: all 0.3s;
}

.history-item:hover {
    border-color: var(--primary);
    box-shadow: 0 2px 8px rgba(7, 193, 96, 0.1);
}

.history-item-info h3 {
    font-size: 15px;
    font-weight: 500;
    margin-bottom: 4px;
}

.history-item-info .meta {
    font-size: 12px;
    color: var(--text-light);
}

.history-item-actions {
    display: flex;
    gap: 8px;
}

.empty-state {
    text-align: center;
    padding: 48px;
    color: var(--text-light);
}

/* 分页 */
.pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 20px;
}

.pagination button {
    padding: 6px 12px;
    border: 1px solid var(--border);
    background: white;
    border-radius: 4px;
    cursor: pointer;
    font-size: 13px;
}

.pagination button.active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

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

/* 加载动画 */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255,255,255,0.9);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    gap: 16px;
}

.loading-overlay.hidden {
    display: none;
}

.loading-spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

#loadingText {
    color: var(--text-light);
    font-size: 14px;
}

.hidden {
    display: none !important;
}

/* 响应式 */
@media (max-width: 768px) {
    .sidebar {
        width: 100%;
        position: relative;
        height: auto;
    }

    .main-content {
        margin-left: 0;
        padding: 16px;
    }

    .app-container {
        flex-direction: column;
    }

    .form-row.two-col {
        grid-template-columns: 1fr;
    }

    .result-header {
        flex-direction: column;
        align-items: flex-start;
    }
}