/* 颜色定义 */
:root {
    --primary: #4F46E5;
    --primary-hover: #4338CA;
    --secondary: #10B981;
    --secondary-hover: #0D9F6E;
    --accent: #F59E0B;
    --neutral: #1F2937;
    --neutral-light: #F3F4F6;
    --gray-100: #F3F4F6;
    --gray-200: #E5E7EB;
    --gray-300: #D1D5DB;
    --gray-400: #9CA3AF;
    --gray-500: #6B7280;
    --white: #FFFFFF;
    --shadow-color: rgba(0, 0, 0, 0.08);
}

/* 基础样式 */
body {
    color: var(--neutral);
    line-height: 1.5;
}

/* 布局样式 */
.container {
    padding-right: 1rem;
    padding-left: 1rem;
}

.header {
    background-color: var(--white);
    box-shadow: 0 1px 3px var(--shadow-color);
    position: sticky;
    top: 0;
    z-index: 50;
    padding: 0.75rem 0;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo-text {
    font-size: 1.25rem;
    font-weight: 700;
    background: linear-gradient(to right, var(--primary), #818CF8);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.header-buttons {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.main-content {
    flex-grow: 1;
    padding: 1rem 0;
}

.grid-container {
    display: grid;
    gap: 1rem;
    grid-template-columns: 1fr;
}

@media (min-width: 1024px) {
    .grid-container {
        grid-template-columns: 1fr 1fr;
    }
}

.footer {
    background-color: var(--white);
    border-top: 1px solid var(--gray-200);
    padding: 1rem 0;
    text-align: center;
    font-size: 0.75rem;
    color: var(--gray-500);
}

/* 卡片样式 */
.help-card, .input-card, .output-card, .fields-card {
    background-color: var(--white);
    border-radius: 0.75rem;
    box-shadow: 0 4px 20px var(--shadow-color);
    padding: 1.5rem;
    margin-bottom: 1rem;
    transition: all 0.3s ease;
}

.help-card {
    transform: scale(0);
    opacity: 0;
    position: absolute;
    width: calc(100% - 2rem);
    max-width: 600px;
    left: 50%;
    top: 5rem;
    transform: translateX(-50%) scale(0);
    z-index: 100;
}

.help-card.active {
    transform: translateX(-50%) scale(1);
    opacity: 1;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.card-title {
    font-size: 1.125rem;
    font-weight: 600;
}

.card-buttons {
    display: flex;
    gap: 0.5rem;
}

.card-footer {
    margin-top: 1rem;
    display: flex;
    justify-content: flex-end;
}

/* 文本区域样式 */
.data-textarea {
    width: 100%;
    border: 1px solid var(--gray-300);
    border-radius: 0.5rem;
    padding: 0.75rem;
    font-size: 0.875rem;
    resize: none;
    outline: none;
}

.data-textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(79, 70, 229, 0.2);
}

/* 按钮样式 */
.icon-button {
    padding: 0.5rem;
    border-radius: 9999px;
    transition: background-color 0.2s;
    border: none;
    background: none;
    cursor: pointer;
}

.icon-button:hover {
    background-color: var(--gray-100);
}

.small-button {
    padding: 0.25rem 0.5rem;
    border-radius: 0.375rem;
    font-size: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.25rem;
    transition: background-color 0.2s;
    border: none;
    cursor: pointer;
}

.action-button {
    padding: 0.5rem 1rem;
    border-radius: 0.375rem;
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: background-color 0.2s;
    border: none;
    cursor: pointer;
    font-weight: 500;
}

.primary-button {
    background-color: rgba(79, 70, 229, 0.1);
    color: var(--primary);
}

.primary-button:hover {
    background-color: rgba(79, 70, 229, 0.2);
}

.secondary-button {
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--secondary);
}

.secondary-button:hover {
    background-color: rgba(16, 185, 129, 0.2);
}

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

.action-button:hover {
    background-color: var(--primary-hover);
}

.secondary-action {
    background-color: var(--secondary);
}

.secondary-action:hover {
    background-color: var(--secondary-hover);
}

/* 字段配置样式 */
.fields-info {
    font-size: 0.75rem;
    color: var(--gray-500);
}

.fields-grid {
    display: grid;
    gap: 1rem;
    grid-template-columns: 1fr;
}

@media (min-width: 768px) {
    .fields-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (min-width: 1024px) {
    .fields-grid {
        grid-template-columns: 1fr 1fr 1fr;
    }
}

.field-item {
    background-color: var(--gray-50);
    padding: 1rem;
    border-radius: 0.5rem;
    border: 1px solid var(--gray-200);
    display: flex;
    align-items: center;
    cursor: move;
    transition: all 0.2s;
}

.field-item:hover {
    box-shadow: 0 1px 3px var(--shadow-color);
}

.field-checkbox {
    margin-right: 0.75rem;
    width: 1.25rem;
    height: 1.25rem;
    color: var(--primary);
    border-radius: 0.25rem;
    border: 1px solid var(--gray-300);
}

.fields-placeholder {
    text-align: center;
    color: var(--gray-500);
    padding: 2rem 0;
    grid-column: 1 / -1;
}

/* 替换输入框样式 */
.replace-input-container {
    margin: 0 1rem;
    flex-grow: 1;
}

.replace-input {
    width: 100%;
    padding: 0.25rem 0.5rem;
    border: 1px solid var(--gray-300);
    border-radius: 0.25rem;
    font-size: 0.75rem;
    outline: none;
}

.replace-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(79, 70, 229, 0.2);
}

/* 调整字段项布局 */
.field-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

@media (max-width: 768px) {
    .field-item {
        flex-wrap: wrap;
    }
    
    .replace-input-container {
        width: 100%;
        margin: 0.5rem 0 0 1.75rem;
    }
}

/* 图标样式 */
[class^="icon-"], [class*=" icon-"] {
    font-style: normal;
    font-weight: normal;
    font-variant: normal;
    text-transform: none;
    line-height: 1;
    -webkit-font-smoothing: antialiased;
}

.icon-database:before { content: "🗃️"; }
.icon-moon:before { content: "🌙"; }
.icon-question:before { content: "❓"; }
.icon-close:before { content: "✕"; }
.icon-eraser:before { content: "🧽"; }
.icon-file:before { content: "📄"; }
.icon-search:before { content: "🔍"; }
.icon-copy:before { content: "⎘"; }
.icon-download:before { content: "⤓"; }
.icon-cog:before { content: "⚙"; }
.icon-info:before { content: "ℹ"; }
.icon-arrows:before { content: "⇅"; }

/* 工具类 */
.hidden {
    display: none;
}

.opacity-50 {
    opacity: 0.5;
}

.cursor-not-allowed {
    cursor: not-allowed;
}

.transition-all {
    transition: all 0.2s;
}

/* 动画 */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.notification {
    animation: fadeIn 0.3s ease-out;
}