/**
 * UAC管理系统登录页面样式
 * 现代化登录界面设计
 */

/* 登录页面全局样式 */
.login-body {
    height: 100vh;
    overflow: hidden;
    background: linear-gradient(135deg, #1A1A1A 0%, #2C3E50 100%);
    font-family: 'Noto Sans SC', 'Hind', sans-serif;
}

/* 登录容器 */
.login-container {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: var(--spacing-lg);
}

/* 动态背景 */
.login-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: 1;
}

.geometric-shapes {
    position: relative;
    width: 100%;
    height: 100%;
}

.shape {
    position: absolute;
    border-radius: 50%;
    background: linear-gradient(45deg, rgba(200, 134, 13, 0.1), rgba(231, 76, 60, 0.1));
    animation: float 6s ease-in-out infinite;
}

.shape-1 {
    width: 80px;
    height: 80px;
    top: 10%;
    left: 10%;
    animation-delay: 0s;
}

.shape-2 {
    width: 120px;
    height: 120px;
    top: 20%;
    right: 15%;
    animation-delay: 1s;
}

.shape-3 {
    width: 60px;
    height: 60px;
    bottom: 30%;
    left: 20%;
    animation-delay: 2s;
}

.shape-4 {
    width: 100px;
    height: 100px;
    bottom: 15%;
    right: 25%;
    animation-delay: 3s;
}

.shape-5 {
    width: 140px;
    height: 140px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: 4s;
}

@keyframes float {
    0%, 100% {
        transform: translateY(0px) rotate(0deg);
        opacity: 0.7;
    }
    50% {
        transform: translateY(-20px) rotate(180deg);
        opacity: 1;
    }
}

/* 主要内容区域 */
.login-content {
    position: relative;
    z-index: 10;
    width: 100%;
    max-width: 420px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-xl);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    padding: var(--spacing-xl);
    animation: slideInUp 0.8s ease-out;
}

@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 登录头部 */
.login-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.logo-container {
    margin-bottom: var(--spacing-md);
}

.login-logo {
    height: 50px;
    width: auto;
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.1));
}

.form-title {
    font-size: var(--font-xl);
    font-weight: 600;
    color: var(--uac-text);
    margin: 0 0 var(--spacing-xs) 0;
}

.form-subtitle {
    color: var(--uac-text-light);
    font-size: var(--font-base);
    margin: 0;
}

/* 登录表单 */
.login-form {
    margin-bottom: var(--spacing-lg);
}

.login-form .form-group {
    margin-bottom: var(--spacing-lg);
}

.login-form label {
    font-weight: 600;
    color: var(--uac-text);
    font-size: var(--font-base);
    margin-bottom: var(--spacing-sm);
    display: block;
}

.login-form .input-wrapper {
    position: relative;
}

.login-form input {
    padding: var(--spacing-lg) var(--spacing-lg) var(--spacing-lg) calc(var(--spacing-2xl) + var(--spacing-md));
    font-size: var(--font-lg);
    border: 2px solid #E9ECEF;
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
    background: var(--uac-white);
}

.login-form input:focus {
    border-color: var(--uac-primary);
    box-shadow: 0 0 0 4px rgba(200, 134, 13, 0.1);
    transform: translateY(-2px);
}

.input-icon {
    position: absolute;
    left: var(--spacing-lg);
    top: 50%;
    transform: translateY(-50%);
    color: var(--uac-text-light);
    font-size: var(--font-lg);
    transition: all var(--transition-base);
}

.login-form input:focus + .input-icon,
.login-form input:focus ~ .input-icon {
    color: var(--uac-primary);
}

/* 密码显示切换 */
.password-toggle {
    position: absolute;
    right: var(--spacing-lg);
    top: 50%;
    transform: translateY(-50%);
    cursor: pointer;
    color: var(--uac-text-light);
    font-size: var(--font-lg);
    transition: all var(--transition-base);
}

.password-toggle:hover {
    color: var(--uac-primary);
}

/* 表单选项 */
.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-2xl);
}

.remember-me {
    display: flex;
    align-items: center;
    cursor: pointer;
    font-size: var(--font-base);
    color: var(--uac-text);
}

.remember-me input[type="checkbox"] {
    display: none;
}

.checkmark {
    width: 20px;
    height: 20px;
    border: 2px solid #E9ECEF;
    border-radius: var(--radius-sm);
    margin-right: var(--spacing-sm);
    position: relative;
    transition: all var(--transition-base);
}

.remember-me input:checked + .checkmark {
    background: var(--uac-primary);
    border-color: var(--uac-primary);
}

.remember-me input:checked + .checkmark::after {
    content: '✓';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: white;
    font-size: var(--font-sm);
    font-weight: bold;
}

.forgot-password {
    color: var(--uac-primary);
    font-size: var(--font-base);
    font-weight: 500;
    transition: all var(--transition-base);
}

.forgot-password:hover {
    color: var(--uac-accent);
    text-decoration: underline;
}

/* 登录按钮 */
.login-btn {
    width: 100%;
    padding: var(--spacing-lg);
    font-size: var(--font-lg);
    font-weight: 600;
    background: var(--uac-gradient);
    color: var(--uac-white);
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 6px 20px rgba(200, 134, 13, 0.3);
}

.login-btn:hover:not(:disabled) {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(200, 134, 13, 0.4);
}

.login-btn:active {
    transform: translateY(-1px);
}

.login-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

.btn-spinner {
    margin-left: var(--spacing-sm);
}

/* 表单底部 */
.form-footer {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid #E9ECEF;
}

.back-to-site a {
    color: var(--uac-text-light);
    font-size: var(--font-base);
    transition: all var(--transition-base);
    display: inline-flex;
    align-items: center;
}

.back-to-site a:hover {
    color: var(--uac-primary);
}

.back-to-site i {
    margin-right: var(--spacing-sm);
}

/* 系统信息 */
.system-info {
    position: fixed;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    color: rgba(255, 255, 255, 0.8);
    font-size: var(--font-sm);
    z-index: 10;
}

.system-info p {
    margin-bottom: var(--spacing-xs);
}

.copyright {
    opacity: 0.7;
}

/* 模态框样式 */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
}

.modal-content {
    background-color: var(--uac-white);
    margin: 10% auto;
    padding: 0;
    border-radius: var(--radius-xl);
    width: 90%;
    max-width: 500px;
    animation: modalSlideIn 0.3s ease-out;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header {
    padding: var(--spacing-xl);
    border-bottom: 1px solid #E9ECEF;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    margin: 0;
    color: var(--uac-text);
    font-size: var(--font-xl);
}

.close {
    font-size: var(--font-2xl);
    font-weight: bold;
    color: var(--uac-text-light);
    cursor: pointer;
    transition: all var(--transition-base);
}

.close:hover {
    color: var(--uac-accent);
}

.modal-body {
    padding: var(--spacing-xl);
}

.modal-body p {
    margin-bottom: var(--spacing-lg);
    color: var(--uac-text-light);
    line-height: 1.6;
}

.reset-btn {
    width: 100%;
    padding: var(--spacing-lg);
    font-size: var(--font-base);
    font-weight: 600;
    background: var(--uac-secondary);
    color: var(--uac-white);
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-base);
}

.reset-btn:hover {
    background: #34495e;
    transform: translateY(-2px);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .login-container {
        padding: var(--spacing-md);
    }

    .login-content {
        padding: var(--spacing-xl);
        max-width: 100%;
    }

    .brand-title {
        font-size: var(--font-2xl);
    }

    .form-header h2 {
        font-size: var(--font-xl);
    }

    .login-form input {
        padding: var(--spacing-md) var(--spacing-md) var(--spacing-md) calc(var(--spacing-xl) + var(--spacing-sm));
        font-size: var(--font-base);
    }

    .login-btn {
        padding: var(--spacing-md);
        font-size: var(--font-base);
    }

    .form-options {
        flex-direction: column;
        gap: var(--spacing-md);
        align-items: flex-start;
    }

    .shape {
        opacity: 0.5;
    }

    .shape-1, .shape-3 { width: 40px; height: 40px; }
    .shape-2, .shape-4 { width: 60px; height: 60px; }
    .shape-5 { width: 80px; height: 80px; }
}

@media (max-width: 480px) {
    .login-content {
        padding: var(--spacing-lg);
    }

    .login-header {
        margin-bottom: var(--spacing-xl);
    }

    .brand-title {
        font-size: var(--font-xl);
    }

    .login-logo {
        height: 45px;
    }

    .modal-content {
        width: 95%;
        margin: 15% auto;
    }

    .modal-header,
    .modal-body {
        padding: var(--spacing-lg);
    }
}

/* 暗黑模式支持（可选） */
@media (prefers-color-scheme: dark) {
    .login-content {
        background: rgba(44, 62, 80, 0.95);
        color: var(--uac-white);
    }

    .form-header h2,
    .login-form label {
        color: var(--uac-white);
    }

    .form-subtitle,
    .back-to-site a {
        color: rgba(255, 255, 255, 0.7);
    }

    .modal-content {
        background-color: var(--uac-secondary);
        color: var(--uac-white);
    }

    .modal-header h3 {
        color: var(--uac-white);
    }
}