/* ============================================
   系统安全课程 - 钓鱼实验平台样式表
   仿校园统一身份认证（CAS）风格
   ============================================ */

/* CSS 变量 */
:root {
    --primary-color: #1a5276;
    --primary-hover: #154360;
    --primary-light: #2e86ab;
    --error-color: #e74c3c;
    --success-color: #27ae60;
    --bg-gradient-start: #1a5276;
    --bg-gradient-end: #5dade2;
    --card-bg: #ffffff;
    --text-primary: #2c3e50;
    --text-secondary: #7f8c8d;
    --border-color: #dcdcdc;
    --input-focus: #3498db;
    --shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
    --radius: 12px;
    --radius-sm: 8px;
    --transition: all 0.3s ease;
}

/* 全局重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC',
                 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

/* ============================================
   登录页
   ============================================ */

.login-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background: linear-gradient(135deg, var(--bg-gradient-start), var(--bg-gradient-end));
    padding: 20px;
}

.login-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 40px;
    width: 100%;
    max-width: 400px;
    animation: slideUp 0.5s ease-out;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Logo 区域 */
.logo-area {
    text-align: center;
    margin-bottom: 30px;
}

.logo-icon {
    font-size: 48px;
    margin-bottom: 10px;
}

.logo-area h1 {
    font-size: 22px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 5px;
}

.logo-area p {
    font-size: 13px;
    color: var(--text-secondary);
}

/* 表单 */
#loginForm {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.input-group {
    position: relative;
    display: flex;
    align-items: center;
}

.input-icon {
    position: absolute;
    left: 14px;
    font-size: 16px;
    opacity: 0.6;
    pointer-events: none;
}

.input-group input {
    width: 100%;
    padding: 12px 12px 12px 42px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 15px;
    transition: var(--transition);
    outline: none;
}

.input-group input:focus {
    border-color: var(--input-focus);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.15);
}

.input-group input.error {
    border-color: var(--error-color);
    animation: shake 0.4s ease-in-out;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20%, 60% { transform: translateX(-6px); }
    40%, 80% { transform: translateX(6px); }
}

/* 登录按钮 */
#loginBtn {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    margin-top: 8px;
}

#loginBtn:hover {
    background: linear-gradient(135deg, var(--primary-hover), var(--primary-color));
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(26, 82, 118, 0.3);
}

#loginBtn:active {
    transform: translateY(0);
}

#loginBtn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

/* 错误提示 */
.error-message {
    color: var(--error-color);
    font-size: 13px;
    text-align: center;
    min-height: 20px;
    margin-top: 4px;
}

/* 底部链接 */
.footer-links {
    text-align: center;
    margin-top: 20px;
}

.footer-links a {
    color: var(--text-secondary);
    font-size: 13px;
    text-decoration: none;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--primary-color);
}

.login-container footer {
    margin-top: 30px;
    color: rgba(255, 255, 255, 0.7);
    font-size: 12px;
}

/* ============================================
   Dashboard
   ============================================ */

.dashboard-body {
    background: #f5f7fa;
    min-height: 100vh;
}

/* 导航栏 */
.navbar {
    background: var(--card-bg);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    padding: 0 30px;
    height: 60px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-brand {
    font-size: 18px;
    font-weight: 600;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-user {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 14px;
    color: var(--text-secondary);
}

.nav-user .username {
    font-weight: 500;
    color: var(--text-primary);
}

#logoutBtn {
    padding: 6px 16px;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 13px;
    cursor: pointer;
    transition: var(--transition);
}

#logoutBtn:hover {
    border-color: var(--error-color);
    color: var(--error-color);
    background: rgba(231, 76, 60, 0.05);
}

/* Dashboard 主体 */
.dashboard-main {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 60px 20px;
    min-height: calc(100vh - 60px);
}

.dashboard-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 60px;
    text-align: center;
    max-width: 500px;
    width: 100%;
    animation: slideUp 0.5s ease-out;
}

.dashboard-card .success-icon {
    font-size: 64px;
    margin-bottom: 20px;
}

.dashboard-card h2 {
    font-size: 24px;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.dashboard-card .subtitle {
    color: var(--text-secondary);
    margin-bottom: 30px;
}

.user-info {
    background: #f8f9fa;
    border-radius: var(--radius-sm);
    padding: 20px;
    text-align: left;
    margin-top: 20px;
}

.user-info-row {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    border-bottom: 1px solid #eee;
}

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

.user-info-label {
    color: var(--text-secondary);
    font-size: 14px;
}

.user-info-value {
    font-weight: 500;
    font-size: 14px;
    color: var(--text-primary);
}

/* ============================================
   响应式
   ============================================ */

@media (max-width: 480px) {
    .login-card {
        padding: 30px 24px;
    }

    .logo-area h1 {
        font-size: 20px;
    }

    .dashboard-card {
        padding: 40px 24px;
    }

    .navbar {
        padding: 0 16px;
    }

    .nav-brand span:last-child {
        display: none;
    }
}