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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #333;
}

/* 导航栏 */
.navbar {
    background: rgba(255, 255, 255, 0.95);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
}

.nav-brand {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links a {
    color: #666;
    text-decoration: none;
    margin-left: 1.5rem;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: #667eea;
}

/* 英雄区域 */
.hero {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: calc(100vh - 70px);
    padding: 2rem;
}

.hero-content {
    text-align: center;
    color: white;
}

.hero-content h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.hero-content p {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    opacity: 0.9;
}

.hero-content .subtitle {
    font-size: 1rem;
    opacity: 0.7;
    margin-bottom: 2rem;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

/* 按钮样式 */
.btn {
    padding: 0.75rem 2rem;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s;
    border: none;
    background: #007bff;
    color: white;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(0, 123, 255, 0.3);
}

.btn-primary {
    background: #007bff;
    color: white;
}

.btn-primary:hover {
    background: #0056b3;
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
}

.btn-secondary {
    background: #6c757d;
    color: white;
}

.btn-secondary:hover {
    background: #5a6268;
}

.btn-full {
    width: 100%;
}

/* 认证容器 */
.auth-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: calc(100vh - 70px);
    padding: 2rem;
}

.auth-card {
    background: white;
    padding: 2.5rem;
    border-radius: 16px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    width: 100%;
    max-width: 400px;
}

.auth-card h2 {
    text-align: center;
    margin-bottom: 1.5rem;
    color: #333;
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: #555;
}

.form-group input {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s;
}

.form-group input:focus {
    outline: none;
    border-color: #667eea;
}

.auth-switch {
    text-align: center;
    margin-top: 1.5rem;
    color: #666;
}

.auth-switch a {
    color: #667eea;
    text-decoration: none;
    font-weight: 600;
}

.auth-switch a:hover {
    text-decoration: underline;
}

.error-message {
    background: #fee;
    color: #c00;
    padding: 0.75rem;
    border-radius: 8px;
    margin-top: 1rem;
    text-align: center;
    display: none;
}

.success-message {
    background: #efe;
    color: #060;
    padding: 0.75rem;
    border-radius: 8px;
    margin-top: 1rem;
    text-align: center;
    display: none;
}

/* 个人中心 */
.profile-container {
    max-width: 600px;
    margin: 2rem auto;
    padding: 0 1rem;
}

.profile-card {
    background: white;
    border-radius: 16px;
    padding: 2rem;
    text-align: center;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    margin-bottom: 1.5rem;
}

.avatar-section {
    margin-bottom: 1rem;
}

.avatar {
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto;
}

.avatar span {
    font-size: 2.5rem;
    color: white;
    font-weight: 600;
}

.profile-info h2 {
    color: #333;
    margin-bottom: 0.5rem;
}

.user-email {
    color: #666;
    margin-bottom: 0.25rem;
}

.user-joined {
    color: #999;
    font-size: 0.875rem;
}

.info-card {
    background: white;
    border-radius: 16px;
    padding: 1.5rem;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
}

.info-card h3 {
    color: #333;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid #f0f0f0;
}

.info-row {
    display: flex;
    justify-content: space-between;
    padding: 0.75rem 0;
    border-bottom: 1px solid #f0f0f0;
}

.info-row:last-child {
    border-bottom: none;
}

.info-label {
    color: #888;
    font-weight: 500;
}

.info-value {
    color: #333;
}

/* 通知气泡 */
.notification-badge {
    display: inline-block;
    background: #dc3545;
    color: white;
    font-size: 11px;
    padding: 2px 6px;
    border-radius: 10px;
    margin-left: 5px;
    vertical-align: top;
    min-width: 18px;
    text-align: center;
}

.nav-links a.active {
    color: #667eea;
}

/* 模态框 */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 1000;
}
.modal-content {
    background: white;
    padding: 2rem;
    border-radius: 16px;
    width: 90%;
    max-width: 500px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.3);
}
.modal-content h3 {
    margin-bottom: 1.5rem;
    color: #333;
}
.modal-actions {
    display: flex;
    gap: 10px;
    margin-top: 1.5rem;
    justify-content: flex-end;
}

/* 按钮变体 */
.btn-success {
    background: #28a745;
    color: white;
}
.btn-success:hover {
    background: #218838;
}
.btn-danger {
    background: #dc3545;
    color: white;
}
.btn-danger:hover {
    background: #c82333;
}

/* 分页 */
.pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 20px;
}
.page-btn {
    padding: 8px 16px;
    border: 1px solid #ddd;
    background: white;
    cursor: pointer;
    border-radius: 4px;
    transition: all 0.2s;
}
.page-btn:hover {
    border-color: #667eea;
    color: #667eea;
}
.page-btn.active {
    background: #667eea;
    color: white;
    border-color: #667eea;
}

/* 容器 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* 表单元素 */
.form-group select, .form-group textarea {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s;
    font-family: inherit;
}
.form-group select:focus, .form-group textarea:focus {
    outline: none;
    border-color: #667eea;
}
.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

/* 响应式 */
@media (max-width: 480px) {
    .hero-content h1 {
        font-size: 2rem;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .auth-card {
        padding: 1.5rem;
    }

    .navbar {
        padding: 1rem;
    }
}