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

body {
    font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    min-height: 100vh;
    color: #333;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 导航栏 */
.navbar {
    background: linear-gradient(135deg, #1a5f23 0%, #2e7d32 100%);
    color: white;
    padding: 1rem 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo i {
    font-size: 2rem;
}

.nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-links a {
    color: white;
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    transition: background 0.3s;
}

.nav-links a:hover {
    background: rgba(255,255,255,0.1);
}

.btn-logout {
    background: #dc3545;
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 5px;
    cursor: pointer;
    transition: background 0.3s;
}

.btn-logout:hover {
    background: #c82333;
}

/* 登录页面 */
.login-page {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 70vh;
}

.login-card {
    background: white;
    padding: 3rem;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    width: 100%;
    max-width: 500px;
}

.login-card h2 {
    color: #1a5f23;
    margin-bottom: 2rem;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

/* 表单样式 */
.form-group {
    margin-bottom: 1.5rem;
}

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

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.8rem;
    border: 2px solid #ddd;
    border-radius: 8px;
    font-size: 1rem;
    transition: border 0.3s;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    border-color: #1a5f23;
    outline: none;
}

.form-row {
    display: flex;
    gap: 1rem;
}

.form-row .form-group {
    flex: 1;
}

/* 按钮 */
.btn-primary {
    background: linear-gradient(135deg, #1a5f23 0%, #2e7d32 100%);
    color: white;
    border: none;
    padding: 1rem 2rem;
    border-radius: 8px;
    font-size: 1.1rem;
    cursor: pointer;
    width: 100%;
    transition: transform 0.3s, box-shadow 0.3s;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(26, 95, 35, 0.3);
}

.btn-secondary {
    background: #6c757d;
    color: white;
    border: none;
    padding: 0.8rem 1.5rem;
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.3s;
}

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

/* 角色选择按钮 */
.login-options {
    margin-top: 2rem;
    text-align: center;
}

.role-buttons {
    margin-top: 1rem;
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.btn-role {
    padding: 1rem 1.5rem;
    border: 2px solid #ddd;
    border-radius: 8px;
    background: white;
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    gap: 10px;
}

.btn-role.student:hover {
    border-color: #1a5f23;
    color: #1a5f23;
}

.btn-role.alumni:hover {
    border-color: #0d6efd;
    color: #0d6efd;
}

/* 页面标题 */
.page-title {
    color: #1a5f23;
    margin: 2rem 0;
    padding-bottom: 1rem;
    border-bottom: 2px solid #eee;
    display: flex;
    align-items: center;
    gap: 10px;
}

/* 表单卡片 */
.form-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0,0,0,0.08);
    margin-bottom: 2rem;
}

.form-card .section-title {
    color: #1a5f23;
    margin: 1.5rem 0 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid #eee;
}

/* 列表样式 */
.job-list, .student-list {
    display: grid;
    gap: 1rem;
}

.job-card, .student-card {
    background: white;
    padding: 1.5rem;
    border-radius: 10px;
    box-shadow: 0 3px 10px rgba(0,0,0,0.05);
    border-left: 4px solid #1a5f23;
}

.job-card:hover, .student-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.job-title {
    color: #1a5f23;
    font-size: 1.2rem;
    font-weight: bold;
    margin-bottom: 0.5rem;
}

.job-company {
    color: #666;
    margin-bottom: 1rem;
}

.job-meta {
    display: flex;
    gap: 1rem;
    color: #888;
    font-size: 0.9rem;
}

/* 筛选栏 */
.filter-bar {
    background: white;
    padding: 1.5rem;
    border-radius: 10px;
    margin-bottom: 2rem;
    display: flex;
    gap: 1rem;
    align-items: flex-end;
    box-shadow: 0 3px 10px rgba(0,0,0,0.05);
}

/* 页脚 */
.footer {
    background: #333;
    color: white;
    text-align: center;
    padding: 2rem 0;
    margin-top: 3rem;
}

.footer p {
    margin: 0.5rem 0;
    opacity: 0.8;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }
    
    .navbar .container {
        flex-direction: column;
        gap: 1rem;
    }
    
    .nav-links {
        flex-wrap: wrap;
        justify-content: center;
        gap: 0.5rem;
    }
    
    .form-row {
        flex-direction: column;
        gap: 0;
    }
    
    .login-card {
        padding: 2rem 1.5rem;
    }
    
    .filter-bar {
        flex-direction: column;
        align-items: stretch;
    }
    
    .job-meta {
        flex-direction: column;
        gap: 0.3rem;
    }
}

/* 消息提示 */
.message {
    padding: 1rem;
    border-radius: 8px;
    margin: 1rem 0;
    text-align: center;
}

.message.success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.message.error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.message.info {
    background: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
}