* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Arial', sans-serif;
}

:root {
    --primary-color: #3498db;
    --primary-hover: #2980b9;
    --secondary-color: #2ecc71;
    --secondary-hover: #27ae60;
    --danger-color: #e74c3c;
    --danger-hover: #c0392b;
    --light-gray: #f5f5f5;
    --mid-gray: #e0e0e0;
    --dark-gray: #333;
    --border-color: #ddd;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

body {
    background-color: #f9f9f9;
    color: #333;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

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

header h1 {
    font-size: 32px;
    color: var(--dark-gray);
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 10px;
    display: inline-block;
}

.tool-panel {
    display: flex;
    margin-bottom: 30px;
    gap: 20px;
}

.tables-container, .table-editor {
    background: white;
    border-radius: 6px;
    box-shadow: var(--shadow);
    padding: 20px;
}

.tables-container {
    flex: 1;
    max-width: 300px;
}

.table-editor {
    flex: 2;
}

.tables-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.tables-header h2, .table-editor h2, .sql-output h2 {
    font-size: 20px;
    color: var(--dark-gray);
}

.btn {
    background-color: var(--light-gray);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 8px 15px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s;
}

.btn:hover {
    background-color: var(--mid-gray);
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
    border: none;
}

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

.btn-danger {
    background-color: var(--danger-color);
    color: white;
    border: none;
}

.btn-danger:hover {
    background-color: var(--danger-hover);
}

.btn-success {
    background-color: var(--secondary-color);
    color: white;
    border: none;
}

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

#tables-list {
    margin-top: 10px;
    max-height: 300px;
    overflow-y: auto;
    border: 1px solid var(--border-color);
    border-radius: 4px;
}

.table-item {
    padding: 10px;
    border-radius: 4px;
    background-color: var(--light-gray);
    margin-bottom: 2px;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-left: 3px solid transparent;
}

.table-item:hover {
    background-color: var(--mid-gray);
    border-left: 3px solid var(--primary-hover);
}

.table-item.active {
    background-color: var(--primary-color);
    color: white;
    font-weight: bold;
    border-left: 3px solid var(--primary-hover);
}

.table-item .delete-btn {
    color: var(--danger-color);
    cursor: pointer;
    font-size: 18px;
    opacity: 0.7;
    transition: opacity 0.2s;
}

.table-item .delete-btn:hover {
    opacity: 1;
}

.table-item.active .delete-btn {
    color: white;
}

.table-name-container {
    margin-bottom: 20px;
}

.table-name-container input {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 16px;
    margin-top: 5px;
}

.fields-container {
    margin-bottom: 20px;
}

.fields-header {
    display: grid;
    grid-template-columns: 2fr 2fr 1fr 1fr 1fr 0.8fr 0.8fr 1fr;
    gap: 10px;
    background-color: var(--light-gray);
    padding: 10px;
    border-radius: 4px 4px 0 0;
    font-weight: bold;
    font-size: 14px;
}

#fields-list {
    border: 1px solid var(--border-color);
    border-top: none;
    border-radius: 0 0 4px 4px;
    margin-bottom: 10px;
    max-height: 300px;
    overflow-y: auto;
}

.field-row {
    display: grid;
    grid-template-columns: 2fr 2fr 1fr 1fr 1fr 0.8fr 0.8fr 1fr;
    gap: 10px;
    padding: 10px;
    border-bottom: 1px solid var(--border-color);
    align-items: center;
}

.field-row:last-child {
    border-bottom: none;
}

.field-row input[type="text"], .field-row select {
    width: 100%;
    padding: 6px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
}

.field-row .field-actions {
    display: flex;
    gap: 5px;
}

.field-row .field-action-btn {
    font-size: 14px;
    cursor: pointer;
    color: var(--primary-color);
}

.field-row .field-action-btn.delete {
    color: var(--danger-color);
}

.fk-container {
    margin-bottom: 20px;
}

#fk-list {
    border: 1px solid var(--border-color);
    border-radius: 4px;
    margin-top: 10px;
}

.fk-item {
    padding: 10px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.fk-item:last-child {
    border-bottom: none;
}

.fk-item .delete-fk {
    color: var(--danger-color);
    cursor: pointer;
}

.actions {
    margin-top: 20px;
    display: flex;
    gap: 10px;
}

.sql-output {
    background: white;
    border-radius: 6px;
    box-shadow: var(--shadow);
    padding: 20px;
}

#sql-output {
    width: 100%;
    height: 200px;
    margin: 10px 0;
    padding: 15px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-family: 'Courier New', monospace;
    font-size: 14px;
    resize: vertical;
}

.sql-actions {
    display: flex;
    gap: 10px;
}

/* 模态框样式 */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
}

.modal-content {
    background-color: white;
    margin: 100px auto;
    padding: 25px;
    border-radius: 6px;
    width: 80%;
    max-width: 500px;
    box-shadow: var(--shadow);
    position: relative;
}

.close {
    position: absolute;
    right: 20px;
    top: 15px;
    font-size: 30px;
    font-weight: bold;
    cursor: pointer;
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
}

.form-group select, .form-group input {
    width: 100%;
    padding: 8px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
}

.modal-actions {
    margin-top: 20px;
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}