/**
 * 田径赛事报名系统 - 表单样式
 * 版本: V1.0
 * 日期: 2026-08-06
 * 
 * 说明: 表单控件、输入框、选择器、日期选择等样式
 */

/* ==================== 表单基础 ==================== */
.form-group {
    margin-bottom: var(--spacing-md);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-size: var(--font-size-sm);
    color: var(--text-primary);
    font-weight: 500;
}

.form-label.required::after {
    content: '*';
    color: var(--error-color);
    margin-left: 4px;
}

.form-control {
    width: 100%;
    height: 36px;
    padding: 0 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    color: var(--text-primary);
    background: var(--bg-container);
    transition: all 0.3s;
}

.form-control:hover {
    border-color: var(--primary-hover);
}

.form-control:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(24, 144, 255, 0.2);
}

.form-control:disabled,
.form-control[readonly] {
    background: var(--bg-color);
    border-color: var(--border-color-split);
    color: var(--text-disabled);
    cursor: not-allowed;
}

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

/* 输入框前缀/后缀 */
.form-control-wrapper {
    position: relative;
    display: flex;
    align-items: stretch;
}

.form-control-wrapper .form-control {
    border-top-right-radius: 0;
    border-bottom-right-radius: 0;
}

.form-control-wrapper .addon {
    display: flex;
    align-items: center;
    padding: 0 12px;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
}

.form-control-wrapper .addon.prepend {
    border-right: 0;
    border-radius: var(--radius-md) 0 0 var(--radius-md);
}

.form-control-wrapper .addon.append {
    border-left: 0;
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.form-control-wrapper .addon + .form-control {
    border-left: 0;
    border-top-right-radius: var(--radius-md);
    border-bottom-right-radius: var(--radius-md);
}

/* 文本域 */
textarea.form-control {
    height: auto;
    min-height: 80px;
    padding: 8px 12px;
    resize: vertical;
}

/* 表单错误状态 */
.form-group.has-error .form-control {
    border-color: var(--error-color);
}

.form-group.has-error .form-control:focus {
    box-shadow: 0 0 0 2px rgba(255, 77, 79, 0.2);
}

.form-group.has-error .form-label {
    color: var(--error-color);
}

.form-error {
    margin-top: var(--spacing-xs);
    font-size: var(--font-size-xs);
    color: var(--error-color);
    min-height: 16px;
}

/* ==================== 选择器 ==================== */
.form-select {
    appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23999' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 16px;
    padding-right: 36px;
}

.form-select option {
    color: var(--text-primary);
}

/* ==================== 日期选择器 ==================== */
.form-date {
    cursor: pointer;
}

.form-date::-webkit-calendar-picker-indicator {
    cursor: pointer;
    opacity: 0.6;
    transition: opacity 0.2s;
}

.form-date::-webkit-calendar-picker-indicator:hover {
    opacity: 1;
}

/* ==================== 复选框和单选 ==================== */
.form-checkbox-group,
.form-radio-group {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.form-checkbox,
.form-radio {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    cursor: pointer;
    user-select: none;
}

.form-checkbox input,
.form-radio input {
    width: 16px;
    height: 16px;
    accent-color: var(--primary-color);
    cursor: pointer;
}

.form-checkbox label,
.form-radio label {
    font-size: var(--font-size-sm);
    color: var(--text-primary);
}

.form-checkbox input:disabled + label,
.form-radio input:disabled + label {
    color: var(--text-disabled);
    cursor: not-allowed;
}

/* 复选框/单选卡片样式 */
.form-check-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: var(--spacing-sm);
}

.form-check-card {
    position: relative;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 12px;
    cursor: pointer;
    transition: all 0.3s;
}

.form-check-card:hover {
    border-color: var(--primary-hover);
}

.form-check-card input {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.form-check-card input:checked + .card-content {
    color: var(--primary-color);
}

.form-check-card:has(input:checked) {
    border-color: var(--primary-color);
    background: var(--primary-light);
}

.form-check-card:has(input:disabled) {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ==================== 开关 ==================== */
.form-switch {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
}

.form-switch input {
    display: none;
}

.switch-track {
    width: 40px;
    height: 22px;
    background: var(--border-color);
    border-radius: 11px;
    position: relative;
    transition: background 0.3s;
}

.switch-thumb {
    position: absolute;
    top: 2px;
    left: 2px;
    width: 18px;
    height: 18px;
    background: #fff;
    border-radius: 50%;
    transition: transform 0.3s;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.form-switch input:checked + .switch-track {
    background: var(--primary-color);
}

.form-switch input:checked + .switch-track .switch-thumb {
    transform: translateX(18px);
}

.form-switch-label {
    font-size: var(--font-size-sm);
    color: var(--text-primary);
}

/* ==================== 上传组件 ==================== */
.form-upload {
    border: 2px dashed var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    text-align: center;
    cursor: pointer;
    transition: all 0.3s;
    background: var(--bg-color-light);
}

.form-upload:hover {
    border-color: var(--primary-color);
    background: var(--primary-light);
}

.form-upload.dragging {
    border-color: var(--primary-color);
    background: var(--primary-light);
}

.form-upload-icon {
    font-size: 48px;
    color: var(--text-tertiary);
    margin-bottom: var(--spacing-sm);
}

.form-upload:hover .form-upload-icon {
    color: var(--primary-color);
}

.form-upload-text {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xs);
}

.form-upload-hint {
    font-size: var(--font-size-xs);
    color: var(--text-tertiary);
}

.form-upload input[type="file"] {
    display: none;
}

/* 已上传文件列表 */
.upload-file-list {
    margin-top: var(--spacing-md);
}

.upload-file-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 8px 12px;
    background: var(--bg-color-light);
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-xs);
}

.upload-file-icon {
    font-size: 20px;
}

.upload-file-name {
    flex: 1;
    font-size: var(--font-size-sm);
    color: var(--text-primary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.upload-file-size {
    font-size: var(--font-size-xs);
    color: var(--text-tertiary);
}

.upload-file-remove {
    color: var(--text-tertiary);
    cursor: pointer;
    padding: 2px;
    transition: color 0.2s;
}

.upload-file-remove:hover {
    color: var(--error-color);
}

/* ==================== 表单布局 ==================== */
.form-section {
    margin-bottom: var(--spacing-lg);
}

.form-section-title {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--border-color-split);
}

.form-row {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.form-row .form-group {
    flex: 1;
    margin-bottom: 0;
}

.form-row .form-group.flex-2 {
    flex: 2;
}

.form-inline {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.form-inline .form-label {
    margin-bottom: 0;
    white-space: nowrap;
}

/* 登录/注册表单 */
.auth-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: var(--spacing-md);
}

.auth-box {
    background: var(--bg-container);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-xl);
    width: 420px;
    max-width: 100%;
}

.auth-logo {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.auth-logo-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--primary-color), var(--purple-color));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    margin: 0 auto var(--spacing-md);
    color: #fff;
}

.auth-title {
    font-size: var(--font-size-xxl);
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.auth-subtitle {
    text-align: center;
    color: var(--text-tertiary);
    margin-bottom: var(--spacing-lg);
    font-size: var(--font-size-sm);
}

.auth-tabs {
    display: flex;
    border-bottom: 1px solid var(--border-color-split);
    margin-bottom: var(--spacing-lg);
}

.auth-tab {
    flex: 1;
    padding: 12px 0;
    text-align: center;
    cursor: pointer;
    color: var(--text-secondary);
    font-size: var(--font-size-base);
    border-bottom: 2px solid transparent;
    transition: all 0.3s;
}

.auth-tab:hover {
    color: var(--primary-color);
}

.auth-tab.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
    font-weight: 500;
}

.auth-form {
    display: none;
}

.auth-form.active {
    display: block;
}

.auth-submit {
    width: 100%;
    height: 44px;
    margin-top: var(--spacing-lg);
    font-size: var(--font-size-lg);
}

.auth-footer {
    text-align: center;
    margin-top: var(--spacing-md);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.auth-footer a {
    color: var(--primary-color);
    cursor: pointer;
}

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

/* 密码强度指示 */
.password-strength {
    margin-top: var(--spacing-xs);
}

.strength-bar {
    height: 4px;
    background: var(--border-color);
    border-radius: 2px;
    overflow: hidden;
    display: flex;
}

.strength-bar-fill {
    height: 100%;
    transition: width 0.3s, background 0.3s;
    border-radius: 2px;
}

.strength-weak {
    background: var(--error-color);
    width: 25%;
}

.strength-medium {
    background: var(--warning-color);
    width: 50%;
}

.strength-strong {
    background: var(--success-color);
    width: 100%;
}

.strength-label {
    font-size: var(--font-size-xs);
    margin-top: 4px;
}

.strength-label.weak { color: var(--error-color); }
.strength-label.medium { color: var(--warning-color); }
.strength-label.strong { color: var(--success-color); }

/* ==================== 响应式 ==================== */
@media (max-width: 768px) {
    .form-row {
        flex-direction: column;
    }
    
    .form-row .form-group {
        flex: none;
    }
    
    .auth-box {
        padding: var(--spacing-lg);
    }
}