/* forms.css - 表单样式 */
/* 表单容器 */
.form-container {
    max-width: 800px;
    margin: 0 auto;
}

.form-card {
    background: var(--dark-card);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    border: 1px solid var(--dark-border);
    margin-bottom: var(--space-xl);
}

/* 表单标题 */
.form-title {
    font-size: var(--text-2xl);
    font-weight: 600;
    margin-bottom: var(--space-xl);
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.form-title i {
    color: var(--primary);
}

/* 表单部分 */
.form-section {
    margin-bottom: var(--space-xl);
    opacity: 0;
    transform: translateY(20px);
    animation: fadeUp 0.8s forwards;
}

.form-section:nth-child(1) { animation-delay: 0.1s; }
.form-section:nth-child(2) { animation-delay: 0.2s; }
.form-section:nth-child(3) { animation-delay: 0.3s; }
.form-section:nth-child(4) { animation-delay: 0.4s; }

/* 表单行 */
.form-row {
    display: flex;
    gap: var(--space-lg);
    margin-bottom: var(--space-lg);
}

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

/* 表单组 */
.form-group {
    position: relative;
    margin-bottom: var(--space-lg);
}

.form-label {
    position: absolute;
    top: 18px;
    left: 16px;
    color: var(--text-tertiary);
    font-size: var(--text-base);
    transition: all 0.3s ease;
    pointer-events: none;
    background: transparent;
    padding: 0 4px;
}

/* 输入框 */
.form-input {
    width: 100%;
    padding: 18px 16px;
    font-size: var(--text-base);
    background-color: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    transition: all 0.3s ease;
}

.form-input:focus {
    outline: none;
    border-color: var(--primary);
    background-color: rgba(0, 122, 255, 0.05);
    box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.1);
}

.form-input:focus + .form-label,
.form-input:not(:placeholder-shown) + .form-label {
    top: -10px;
    left: 12px;
    font-size: var(--text-sm);
    color: var(--primary);
    background-color: var(--dark-card);
    padding: 0 8px;
}

.form-input::placeholder {
    color: transparent;
}

/* 文本域 */
textarea.form-input {
    min-height: 120px;
    resize: vertical;
    line-height: 1.5;
    font-family: inherit;
}

/* 选择框 */
.select-wrapper {
    position: relative;
}

.select-wrapper::after {
    content: '▼';
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-tertiary);
    pointer-events: none;
    font-size: 12px;
}

.form-select {
    width: 100%;
    padding: 18px 16px;
    font-size: var(--text-base);
    background-color: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    cursor: pointer;
}

.form-select:focus {
    outline: none;
    border-color: var(--primary);
    background-color: rgba(0, 122, 255, 0.05);
}

/* 复选框和单选框 */
.checkbox-group,
.radio-group {
    display: flex;
    align-items: flex-start;
    margin-bottom: var(--space-md);
    gap: var(--space-sm);
}

.checkbox-input,
.radio-input {
    width: 20px;
    height: 20px;
    margin-top: 2px;
    accent-color: var(--primary);
    flex-shrink: 0;
}

.checkbox-label,
.radio-label {
    font-size: var(--text-base);
    color: var(--text-secondary);
    line-height: 1.5;
    flex: 1;
}

.checkbox-label a,
.radio-label a {
    color: var(--primary);
    text-decoration: none;
    transition: color 0.3s;
}

.checkbox-label a:hover,
.radio-label a:hover {
    text-decoration: underline;
}

/* 密码字段 */
.password-field {
    position: relative;
}

.toggle-password {
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-tertiary);
    cursor: pointer;
    font-size: var(--text-lg);
    padding: var(--space-xs);
    transition: color 0.3s;
    z-index: 2;
}

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

/* 密码强度 */
.password-strength {
    margin-top: var(--space-sm);
}

.strength-bar {
    height: 4px;
    background: var(--dark-border);
    border-radius: 2px;
    overflow: hidden;
    margin-bottom: var(--space-xs);
}

.strength-fill {
    height: 100%;
    width: 0;
    border-radius: 2px;
    transition: all 0.3s ease;
}

.strength-text {
    font-size: var(--text-sm);
    color: var(--text-tertiary);
}

/* 地址行 */
.address-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-lg);
    margin-bottom: var(--space-lg);
}

/* 表单操作 */
.form-actions {
    display: flex;
    gap: var(--space-lg);
    margin-top: var(--space-xl);
}

/* 按钮 */
.btn {
    padding: 16px 32px;
    border-radius: var(--radius-md);
    font-size: var(--text-base);
    font-weight: 600;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    gap: var(--space-sm);
    position: relative;
    overflow: hidden;
}

.btn-block {
    width: 100%;
}

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

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

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

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-2px);
}

.btn-success {
    background: var(--gradient-success);
    color: var(--text-primary);
}

.btn-success:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(40, 205, 65, 0.3);
}

.btn-danger {
    background: linear-gradient(135deg, #FF3B30 0%, #FF2D55 100%);
    color: var(--text-primary);
}

.btn-danger:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(255, 59, 48, 0.3);
}

.btn-outline {
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: var(--text-primary);
}

.btn-outline:hover {
    border-color: var(--primary);
    background: rgba(0, 122, 255, 0.05);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none !important;
}

.btn-loading {
    position: relative;
    color: transparent !important;
}

.btn-loading::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 0.8s linear infinite;
}

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

.btn-ripple {
    position: relative;
    overflow: hidden;
}

.btn-ripple::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 5px;
    height: 5px;
    background: rgba(255, 255, 255, 0.5);
    opacity: 0;
    border-radius: 50%;
    transform: scale(1, 1) translate(-50%);
    transform-origin: 50% 50%;
}

.btn-ripple:focus:not(:active)::after {
    animation: ripple 1s ease-out;
}

@keyframes ripple {
    0% {
        transform: scale(0, 0);
        opacity: 0.5;
    }
    100% {
        transform: scale(40, 40);
        opacity: 0;
    }
}

/* 表单帮助文本 */
.form-help {
    font-size: var(--text-sm);
    color: var(--text-tertiary);
    margin-top: var(--space-xs);
    line-height: 1.5;
}

.form-help a {
    color: var(--primary);
    text-decoration: none;
}

.form-help a:hover {
    text-decoration: underline;
}

/* 必填字段标记 */
.required {
    color: var(--danger);
    margin-left: 2px;
}

/* 验证状态 */
.is-valid .form-input,
.is-valid .form-select {
    border-color: var(--success);
    background-color: rgba(40, 205, 65, 0.05);
}

.is-invalid .form-input,
.is-invalid .form-select {
    border-color: var(--danger);
    background-color: rgba(255, 59, 48, 0.05);
}

.invalid-feedback {
    font-size: var(--text-sm);
    color: var(--danger);
    margin-top: var(--space-xs);
}

.valid-feedback {
    font-size: var(--text-sm);
    color: var(--success);
    margin-top: var(--space-xs);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .form-row {
        flex-direction: column;
        gap: var(--space-md);
    }
    
    .address-row {
        grid-template-columns: 1fr;
    }
    
    .form-actions {
        flex-direction: column;
    }
    
    .btn {
        padding: 14px 24px;
    }
    
    .form-card {
        padding: var(--space-lg);
    }
}

@media (max-width: 480px) {
    .form-card {
        padding: var(--space-md);
    }
    
    .form-title {
        font-size: var(--text-xl);
    }
    
    .form-input,
    .form-select {
        padding: 14px 12px;
        font-size: var(--text-sm);
    }
}