/* 认证页面样式（登录/注册） */

.auth-container {
    min-height: calc(100vh - 80px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

.auth-box {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 30px;
    padding: 40px;
    width: 100%;
    max-width: 420px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(10px);
}

.auth-box[style*="max-width: 500px"] {
    max-width: 500px;
}

.auth-header {
    text-align: center;
    margin-bottom: 30px;
}

.auth-title {
    font-size: 32px;
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 8px;
}

.auth-subtitle {
    color: var(--text-secondary);
    font-size: 14px;
}

.auth-form {
    margin-bottom: 20px;
}

.form-row {
    display: flex;
    gap: 16px;
    margin-bottom: 0;
}

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

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    color: var(--text-primary);
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 8px;
}

.form-group input {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-elevated);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    color: var(--text-primary);
    font-size: 15px;
    transition: all 0.3s;
}

.form-group input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 4px var(--glow-color);
}

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

/* 验证码区域 */
.captcha-section {
    display: flex;
    gap: 12px;
    margin-bottom: 12px;
}

.captcha-question {
    flex: 1;
    padding: 12px 16px;
    background: var(--bg-elevated);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    font-weight: 600;
    text-align: center;
    font-size: 18px;
    color: var(--accent-primary);
    letter-spacing: 2px;
}

.captcha-refresh {
    width: 48px;
    height: 48px;
    background: var(--bg-elevated);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    color: var(--text-secondary);
    font-size: 24px;
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.captcha-refresh:hover {
    border-color: var(--accent-primary);
    color: var(--accent-primary);
    transform: rotate(180deg);
}

/* 密码强度 */
.password-strength {
    margin-top: 8px;
    font-size: 13px;
}

.strength-weak {
    color: #ef4444;
}

.strength-medium {
    color: #f59e0b;
}

.strength-strong {
    color: #10b981;
}

/* 邀请码区域 */
.invite-section {
    margin-bottom: 20px;
    padding: 16px;
    background: var(--bg-elevated);
    border-radius: 12px;
    border: 1px dashed var(--border-color);
}

.invite-section label {
    display: block;
    color: var(--text-secondary);
    font-size: 13px;
    margin-bottom: 8px;
}

.invite-section input {
    width: 100%;
    padding: 10px 12px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 14px;
}

/* 尝试警告 */
.attempts-warning {
    font-size: 13px;
    color: #ef4444;
    margin-top: -8px;
    margin-bottom: 16px;
    text-align: center;
    display: none;
}

/* 加载动画 */
.loading-spinner {
    text-align: center;
    margin: 16px 0;
}

.spinner {
    width: 32px;
    height: 32px;
    border: 3px solid var(--border-color);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* 认证按钮 */
.auth-btn {
    width: 100%;
    padding: 14px;
    background: var(--accent-gradient);
    border: none;
    border-radius: 40px;
    color: white;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    margin-top: 8px;
}

.auth-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 20px 30px -10px var(--glow-color);
}

.auth-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* 认证链接 */
.auth-links {
    text-align: center;
    margin-top: 24px;
    display: flex;
    justify-content: space-between;
}

.auth-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    transition: all 0.3s;
}

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

/* 认证底部 */
.auth-footer {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.auth-footer a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    transition: all 0.3s;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

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

/* 消息提示 */
.auth-message {
    padding: 12px 16px;
    border-radius: 12px;
    margin-bottom: 24px;
    text-align: center;
    font-size: 14px;
    display: none;
}

.auth-message.success {
    background: rgba(16, 185, 129, 0.1);
    color: #10b981;
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.auth-message.error {
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
    border: 1px solid rgba(239, 68, 68, 0.3);
}

.auth-message.warning {
    background: rgba(245, 158, 11, 0.1);
    color: #f59e0b;
    border: 1px solid rgba(245, 158, 11, 0.3);
}

/* 响应式 */
@media (max-width: 768px) {
    .auth-box {
        padding: 30px 20px;
    }
    
    .form-row {
        flex-direction: column;
        gap: 0;
    }
    
    .auth-title {
        font-size: 28px;
    }
    
    .captcha-section {
        flex-wrap: wrap;
    }
    
    .captcha-refresh {
        width: 100%;
    }
}