* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Microsoft YaHei', 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, var(--primary-100) 0%, var(--accent-100) 100%);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    color: var(--text-100);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.login-container {
    width: 100%;
    max-width: 400px;
    padding: var(--spacing-md);
}

.login-box {
    background: var(--bg-100);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-xl) var(--spacing-lg);
    text-align: center;
    animation: fadeIn 0.5s ease-in-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.login-header h1 {
    color: var(--primary-100);
    font-size: 28px;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
}

.login-header p {
    color: var(--text-200);
    font-size: 16px;
    margin-bottom: var(--spacing-lg);
}

.login-form {
    text-align: left;
}

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

.form-group label {
    display: block;
    margin-bottom: var(--spacing-sm);
    color: var(--text-100);
    font-weight: 500;
    font-size: 14px;
}

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

.input-group input {
    flex: 1;
    padding: 12px 15px;
    border: 2px solid var(--bg-400);
    border-radius: var(--border-radius-md) 0 0 var(--border-radius-md);
    font-size: 16px;
    transition: all 0.3s ease;
    background-color: var(--bg-100);
    color: var(--text-100);
}

.input-group input:focus {
    outline: none;
    border-color: var(--primary-200);
    box-shadow: 0 0 0 3px rgba(89, 165, 245, 0.2);
}

.input-group input::placeholder {
    color: var(--text-400);
}

.scan-btn {
    padding: 12px 20px;
    background: var(--bg-200);
    border: 2px solid var(--bg-400);
    border-left: none;
    border-radius: 0 var(--border-radius-md) var(--border-radius-md) 0;
    cursor: pointer;
    font-size: 14px;
    color: var(--text-200);
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.scan-btn:hover {
    background: var(--bg-300);
    color: var(--text-100);
}

.scan-btn::before {
    content: "📷";
    margin-right: 5px;
}

.form-group input[type="password"] {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid var(--bg-400);
    border-radius: var(--border-radius-md);
    font-size: 16px;
    transition: all 0.3s ease;
    background-color: var(--bg-100);
    color: var(--text-100);
}

.form-group input[type="password"]:focus {
    outline: none;
    border-color: var(--primary-200);
    box-shadow: 0 0 0 3px rgba(89, 165, 245, 0.2);
}

.form-group input[type="password"]::placeholder {
    color: var(--text-400);
}

.login-btn {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, var(--primary-100) 0%, var(--accent-200) 100%);
    color: var(--bg-100);
    border: none;
    border-radius: var(--border-radius-md);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.login-btn::before {
    content: "";
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.login-btn:hover::before {
    left: 100%;
}

.login-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 119, 194, 0.4);
}

.login-btn:active {
    transform: translateY(0);
}

.error-message {
    color: var(--danger);
    font-size: 14px;
    margin-top: var(--spacing-md);
    text-align: center;
    display: none;
    padding: var(--spacing-sm);
    background-color: rgba(220, 53, 69, 0.1);
    border-radius: var(--border-radius-sm);
    border-left: 3px solid var(--danger);
}

.error-message.show {
    display: block;
    animation: shake 0.5s ease-in-out;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    10%, 30%, 50%, 70%, 90% { transform: translateX(-5px); }
    20%, 40%, 60%, 80% { transform: translateX(5px); }
}

/* 响应式设计 */
@media (max-width: 480px) {
    .login-container {
        padding: var(--spacing-sm);
    }
    
    .login-box {
        padding: var(--spacing-lg) var(--spacing-md);
    }
    
    .login-header h1 {
        font-size: 24px;
    }
    
    .form-group {
        margin-bottom: var(--spacing-md);
    }
    
    .scan-btn {
        padding: 12px 15px;
        font-size: 12px;
    }
    
    .scan-btn::before {
        margin-right: 3px;
    }
}

/* 暗色模式支持 */
@media (prefers-color-scheme: dark) {
    body {
        background: linear-gradient(135deg, #1a237e 0%, #0d47a1 100%);
    }
    
    .login-box {
        background: rgba(30, 30, 30, 0.9);
        color: var(--text-500);
    }
    
    .login-header h1 {
        color: var(--primary-200);
    }
    
    .form-group label {
        color: var(--text-500);
    }
    
    .input-group input,
    .form-group input[type="password"] {
        background-color: rgba(50, 50, 50, 0.8);
        color: var(--text-500);
        border-color: rgba(255, 255, 255, 0.1);
    }
    
    .scan-btn {
        background: rgba(70, 70, 70, 0.8);
        border-color: rgba(255, 255, 255, 0.1);
        color: var(--text-500);
    }
}

/* 触摸设备优化 */
@media (hover: none) {
    .login-btn:hover {
        transform: none;
        box-shadow: none;
    }
    
    .login-btn:active {
        transform: scale(0.98);
    }
}

/* 控制扫描按钮显示 */
@media (min-width: 768px) {
    /* 桌面端隐藏扫描按钮 */
    .scan-btn {
        display: none !important;
    }
}

@media screen and (orientation: landscape) and (max-width: 768px) {
    /* 移动端横屏隐藏扫描按钮 */
    .scan-btn {
        display: none !important;
    }
}

/* 扫码模态框样式 */
.scan-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    z-index: 1000;
    animation: fadeIn 0.3s ease-in-out;
}

.scan-modal.show {
    display: flex;
    justify-content: center;
    align-items: center;
}

.scan-modal-content {
    background: var(--bg-100);
    border-radius: var(--border-radius-lg);
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    animation: slideUp 0.3s ease-in-out;
}

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

.scan-modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--bg-400);
}

.scan-modal-header h3 {
    color: var(--text-100);
    font-size: 20px;
    font-weight: 600;
}

.close-btn {
    background: none;
    border: none;
    font-size: 24px;
    color: var(--text-300);
    cursor: pointer;
    padding: 0;
    width: 30px;
    height: 30px;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: var(--border-radius-sm);
    transition: all 0.3s ease;
}

.close-btn:hover {
    background: var(--bg-300);
    color: var(--text-100);
}

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

.scan-container {
    position: relative;
    width: 100%;
    height: 300px;
    background: var(--bg-200);
    border-radius: var(--border-radius-md);
    overflow: hidden;
    margin-bottom: var(--spacing-lg);
}

.scan-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.scan-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    pointer-events: none;
}

.scan-frame {
    width: 200px;
    height: 200px;
    border: 2px solid var(--primary-100);
    border-radius: var(--border-radius-md);
    position: relative;
    box-shadow: 0 0 0 9999px rgba(0, 0, 0, 0.3);
}

.scan-frame::before,
.scan-frame::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    border: 3px solid var(--primary-100);
}

.scan-frame::before {
    top: -3px;
    left: -3px;
    border-right: none;
    border-bottom: none;
}

.scan-frame::after {
    bottom: -3px;
    right: -3px;
    border-left: none;
    border-top: none;
}

.scan-line {
    position: absolute;
    top: 50%;
    left: 10%;
    width: 80%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--primary-100), transparent);
    animation: scanLine 2s linear infinite;
}

@keyframes scanLine {
    0% {
        top: 10%;
    }
    50% {
        top: 90%;
    }
    100% {
        top: 10%;
    }
}





.scan-result {
    text-align: center;
    padding: var(--spacing-md);
    background: var(--bg-200);
    border-radius: var(--border-radius-md);
    color: var(--text-100);
    font-size: 14px;
    min-height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.scan-result.success {
    background: rgba(40, 167, 69, 0.1);
    color: var(--success);
    border: 1px solid var(--success);
}

.scan-result.error {
    background: rgba(220, 53, 69, 0.1);
    color: var(--danger);
    border: 1px solid var(--danger);
}

/* 响应式设计 */
@media (max-width: 480px) {
    .scan-modal-content {
        width: 95%;
        max-height: 95vh;
        bottom: 0;
        top: auto;
        border-radius: var(--border-radius-lg) var(--border-radius-lg) 0 0;
        animation: slideUp 0.3s ease-in-out;
    }
    
    .scan-modal-header {
        padding: var(--spacing-md);
    }
    
    .scan-modal-body {
        padding: var(--spacing-md);
    }
    
    .scan-container {
        height: 250px;
    }
    
    .scan-frame {
        width: 150px;
        height: 150px;
    }
    
    
    
    /* 移动端全屏扫描模式 */
    .scan-modal.fullscreen {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: #000;
        z-index: 9999;
    }
    
    .scan-modal.fullscreen .scan-modal-content {
        width: 100%;
        height: 100%;
        max-height: 100%;
        border-radius: 0;
        display: flex;
        flex-direction: column;
    }
    
    .scan-modal.fullscreen .scan-modal-header {
        background: rgba(0, 0, 0, 0.8);
        color: white;
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        z-index: 1;
        border: none;
    }
    
    .scan-modal.fullscreen .scan-modal-body {
        flex: 1;
        display: flex;
        flex-direction: column;
        padding: 0;
    }
    
    .scan-modal.fullscreen .scan-container {
        flex: 1;
        height: auto;
        background: #000;
    }
    
    .scan-modal.fullscreen .scan-video {
        width: 100%;
        height: 100%;
    }
    
    
    
    .scan-modal.fullscreen .scan-result {
        background: rgba(0, 0, 0, 0.8);
        color: white;
        margin: var(--spacing-md);
        position: absolute;
        top: 60px;
        left: 0;
        right: 0;
    }
    
    .scan-modal.fullscreen .close-btn {
        color: white;
        font-size: 28px;
    }
    
    /* 横屏模式优化 */
    @media screen and (orientation: landscape) and (max-width: 768px) {
        .scan-modal-content {
            max-width: 90vw;
        }
        
        .scan-container {
            height: 300px;
        }
        
        .scan-frame {
            width: 180px;
            height: 180px;
        }
    }
}

/* 暗色模式支持 */
@media (prefers-color-scheme: dark) {
    .scan-modal-content {
        background: rgba(30, 30, 30, 0.9);
    }
    
    .scan-modal-header h3 {
        color: var(--text-500);
    }
    
    .close-btn {
        color: var(--text-400);
    }
    
    .close-btn:hover {
        background: rgba(70, 70, 70, 0.8);
        color: var(--text-500);
    }
    
    .scan-container {
        background: rgba(50, 50, 50, 0.8);
    }
    
    .scan-result {
        background: rgba(70, 70, 70, 0.8);
        color: var(--text-500);
    }
}