/* 核心变量：纯白+冷蓝色调+高明亮度 */
:root {
    --color-primary: #4f86f7;      /* 冷蓝色主调 */
    --color-primary-light: #70a1ff;/* 浅冷蓝 */
    --color-primary-dark: #3b74e3; /* 深冷蓝 */
    --color-success: #10b981;      /* 成功绿 */
    --color-danger: #ef4444;       /* 错误红 */
    --color-warning: #f59e0b;      /* 警告黄 */
    --color-dark: #2d3748;         /* 深灰文本 */
    --color-gray: #718096;         /* 中灰色 */
    --color-light-gray: #e2e8f0;   /* 浅灰色边框 */
    --color-extra-light: #f8fafc;  /* 超浅灰背景 */
    --color-white: #ffffff;        /* 纯白背景 */
    --color-light-bg: rgba(79, 134, 247, 0.05); /* 极浅冷蓝背景 */
    
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-full: 9999px;
    
    --transition-fast: 0.2s ease;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.03);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.05);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: var(--color-white); /* 纯白背景 */
    color: var(--color-dark);
    line-height: 1.5;
    min-height: 100vh;
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

::selection {
    background-color: rgba(79, 134, 247, 0.15); /* 冷蓝选中文本背景 */
    color: var(--color-primary-dark);
}

/* 美化滚动条 - 冷蓝色调 */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--color-white);
}
::-webkit-scrollbar-thumb {
    background: var(--color-primary);
    border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
    background: var(--color-primary-dark);
}

/* 主容器 */
.register-container {
    width: 100%;
    max-width: 600px;
    padding: 10px;
}

/* 页面头部 */
.register-header {
    text-align: center;
    margin-bottom: 35px;
    padding-top: 10px;
}

.logo {
    color: var(--color-primary);
    font-size: 42px;
    margin-bottom: 25px;
}

.register-header h2 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--color-dark);
}

.register-header p {
    font-size: 1rem;
    color: var(--color-gray);
    margin-bottom: 18px;
}

.login-link {
    color: var(--color-primary);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: all var(--transition-fast);
    padding: 6px 12px;
    border-radius: var(--radius-sm);
}

.login-link:hover {
    text-decoration: underline;
    background-color: var(--color-light-bg);
}

/* 主体内容 */
.register-body {
    width: 100%;
}

/* 步骤内容区 */
.step-content {
    display: none;
    width: 100%;
}

.step-content.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

/* 表单控件 */
.form-group {
    margin-bottom: 20px;
    position: relative;
}

.form-control {
    width: 100%;
    padding: 15px 16px;
    border: 1px solid var(--color-light-gray);
    border-radius: var(--radius-md);
    font-size: 1rem;
    transition: all var(--transition-fast);
    background-color: var(--color-white);
    color: var(--color-dark);
}

.form-control:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 2px rgba(79, 134, 247, 0.1);
}

.form-control::placeholder {
    color: var(--color-gray);
}

.form-control.error {
    border-color: var(--color-danger);
}

/* 错误提示 */
.error-message {
    display: none;
    color: var(--color-danger);
    font-size: 0.85rem;
    margin-top: 6px;
    padding-left: 4px;
    align-items: center;
    gap: 6px;
}

.error-message.show {
    display: flex;
}

/* 验证码样式 */
.captcha-group {
    display: flex;
    gap: 15px;
    align-items: center;
}

.captcha-input {
    flex: 1;
}

.captcha-img {
    width: 120px;
    height: 50px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    border: 1px solid var(--color-light-gray);
    transition: all var(--transition-fast);
    object-fit: cover;
}

.captcha-img:hover {
    opacity: 0.95;
    transform: scale(1.01);
}

.code-group {
    display: flex;
    gap: 10px;
    align-items: center;
}

.code-input {
    flex: 1;
}

/* 按钮样式 */
.btn {
    padding: 15px 24px;
    border: none;
    border-radius: var(--radius-full);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn-primary {
    background-color: var(--color-primary);
    color: var(--color-white);
}

.btn-primary:hover {
    background-color: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-block {
    width: 100%;
}

.btn-code {
    white-space: nowrap;
    padding: 15px 20px;
}

.btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none !important;
}

/* 按钮组 */
.button-group {
    margin-top: 25px;
}

/* 页脚 */
.register-footer {
    text-align: center;
    margin-top: 40px;
    padding-top: 20px;
    font-size: 0.9rem;
    color: var(--color-gray);
    border-top: 1px solid var(--color-light-gray);
}

.register-footer a {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 500;
}

.register-footer a:hover {
    text-decoration: underline;
}

/* 通知样式 */
.notification-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 9999;
    width: 100%;
    max-width: 400px;
}

.notification {
    background: var(--color-white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    padding: 16px;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    border-left: 4px solid;
    transform: translateX(100%);
    opacity: 0;
}

.notification.show {
    transform: translateX(0);
    opacity: 1;
    animation: slideInRight 0.3s ease;
}

.notification-icon {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 12px;
    font-size: 1rem;
    flex-shrink: 0;
}

.notification-content {
    flex: 1;
}

.notification-title {
    font-weight: 600;
    margin-bottom: 2px;
    font-size: 0.95rem;
}

.notification-message {
    font-size: 0.85rem;
    color: var(--color-gray);
}

/* 通知类型样式 */
.notification.success {
    border-left-color: var(--color-success);
}
.notification.success .notification-icon {
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--color-success);
}

.notification.danger {
    border-left-color: var(--color-danger);
}
.notification.danger .notification-icon {
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--color-danger);
}

.notification.warning {
    border-left-color: var(--color-warning);
}
.notification.warning .notification-icon {
    background-color: rgba(245, 158, 11, 0.1);
    color: var(--color-warning);
}

.notification.info {
    border-left-color: var(--color-primary);
}
.notification.info .notification-icon {
    background-color: var(--color-light-bg);
    color: var(--color-primary);
}

/* 动画 */
@keyframes slideInRight {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

@keyframes fadeOut {
    from { transform: translateX(0); opacity: 1; }
    to { transform: translateX(100%); opacity: 0; }
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loading-icon {
    animation: spin 1s linear infinite;
}

/* 响应式适配 */
@media (max-width: 576px) {
    .register-container {
        max-width: 100%;
    }
    
    .captcha-group {
        flex-direction: column;
        align-items: stretch;
    }
    
    .captcha-img {
        width: 100%;
        height: 50px;
    }
    
    .register-header h2 {
        font-size: 1.6rem;
    }
    
    .code-group {
        flex-direction: column;
        align-items: stretch;
    }
    
    .btn-code {
        width: 100%;
        margin-top: 10px;
    }
}