/* =============================================
   用户留言系统 — 前端表单样式
   ============================================= */

.uis-form-wrapper {
    max-width: 640px;
    margin: 1.5rem 0;
}

/* 登录提示 / 问候语 */
.uis-login-notice,
.uis-greeting {
    max-width: 640px;
}

.uis-greeting {
    margin-bottom: 1rem;
    padding: 0.75rem 1rem;
    background: #f0f9ff;
    border-radius: 6px;
    border: 1px solid #bae6fd;
    font-size: 0.95rem;
    color: #1e3a5f;
}

/* 表单字段 */
.uis-field {
    margin-bottom: 1.25rem;
}

.uis-field label {
    display: block;
    margin-bottom: 0.35rem;
    font-weight: 600;
    font-size: 0.95rem;
    color: #333;
}

.uis-field input[type="text"],
.uis-field input[type="email"],
.uis-field input[type="tel"],
.uis-field textarea {
    width: 100%;
    padding: 0.6rem 0.75rem;
    font-size: 1rem;
    line-height: 1.5;
    color: #333;
    background: #fff;
    border: 1px solid #d1d5db;
    border-radius: 6px;
    transition: border-color 0.2s, box-shadow 0.2s;
    box-sizing: border-box;
}

.uis-field input:focus,
.uis-field textarea:focus {
    border-color: #3b82f6;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
    outline: none;
}

.uis-field textarea {
    resize: vertical;
    min-height: 120px;
}

/* 提交按钮 */
.uis-submit-row {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.uis-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.6rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    line-height: 1.5;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: background 0.2s, opacity 0.2s;
    text-decoration: none;
}

.uis-btn-primary {
    background: #2563eb;
    color: #fff;
}

.uis-btn-primary:hover {
    background: #1d4ed8;
}

.uis-btn-primary:disabled {
    opacity: 0.65;
    cursor: not-allowed;
}

/* 加载动画 */
.uis-spinner {
    display: inline-block;
    width: 22px;
    height: 22px;
    border: 3px solid #e5e7eb;
    border-top-color: #3b82f6;
    border-radius: 50%;
    animation: uis-spin 0.7s linear infinite;
}

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

/* 响应消息 */
.uis-response {
    margin-top: 1rem;
    padding: 0.75rem 1rem;
    border-radius: 6px;
    font-size: 0.95rem;
    line-height: 1.5;
}

.uis-response.uis-success {
    background: #dcfce7;
    color: #15803d;
    border: 1px solid #bbf7d0;
}

.uis-response.uis-error {
    background: #fee2e2;
    color: #b91c1c;
    border: 1px solid #fecaca;
}

/* 错误高亮 */
.uis-field.uis-has-error input,
.uis-field.uis-has-error textarea {
    border-color: #ef4444;
}

.uis-field-error {
    color: #dc2626;
    font-size: 0.85rem;
    margin-top: 0.25rem;
}