.sql-builder-mode-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 25px;
    justify-content: center;
}
.sql-mode-tab {
    padding: 12px 24px;
    border: 2px solid #e0e3eb;
    border-radius: 30px;
    background: white;
    cursor: pointer;
    white-space: nowrap;
    font-size: 14px;
    transition: all 0.3s;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
}
.sql-mode-tab.active {
    background: linear-gradient(135deg, #2196F3, #1976D2);
    color: white;
    border-color: #1976D2;
    box-shadow: 0 4px 15px rgba(33, 150, 243, 0.35);
    transform: translateY(-2px);
}
.sql-mode-tab:hover:not(.active) {
    background: #e3f2fd;
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-1px);
}
.sql-mode-tab i {
    font-size: 20px;
}

.sql-mode-content {
    display: none;
    animation: fadeIn 0.3s;
}
.sql-mode-content.active {
    display: block;
}
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.sql-section-card {
    background: linear-gradient(to bottom, #f8f9fa, #ffffff);
    border-radius: 15px;
    padding: 25px;
    margin-bottom: 25px;
    border: 2px solid #e0e3eb;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    transition: all 0.3s;
}
.sql-section-card:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    border-color: #bbdefb;
}
.sql-section-title {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 17px;
    color: #333;
    margin-bottom: 20px;
    font-weight: 700;
    padding-bottom: 12px;
    border-bottom: 2px solid #e0e3eb;
}
.sql-section-title i {
    color: #2196F3;
    font-size: 24px;
    background: #e3f2fd;
    padding: 8px;
    border-radius: 8px;
}

.sql-form-group {
    margin-bottom: 20px;
}
.sql-form-group label {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 10px;
    font-weight: 600;
    color: #555;
    font-size: 15px;
}
.required-mark {
    color: #f44336;
    font-size: 18px;
    font-weight: bold;
}
.optional-mark {
    color: #9e9e9e;
    font-size: 12px;
    font-weight: normal;
    background: #f5f5f5;
    padding: 2px 8px;
    border-radius: 10px;
}
.sql-form-group input,
.sql-form-group select,
.sql-form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #e0e3eb;
    border-radius: 10px;
    font-size: 14px;
    transition: all 0.3s;
    font-family: inherit;
    background: white;
}
.sql-form-group input:focus,
.sql-form-group select:focus,
.sql-form-group textarea:focus {
    outline: none;
    border-color: #2196F3;
    box-shadow: 0 0 0 4px rgba(33, 150, 243, 0.1);
    background: #fafafa;
}
.sql-form-group textarea {
    min-height: 90px;
    resize: vertical;
}

.sql-hint {
    font-size: 13px;
    color: #757575;
    margin-top: 8px;
    display: flex;
    align-items: center;
    gap: 6px;
}
.sql-hint i {
    font-size: 16px;
    color: #2196F3;
}

.sql-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.sql-toggle-section {
    background: #fff;
    border: 2px solid #e0e3eb;
    border-radius: 12px;
    overflow: hidden;
}
.sql-toggle-header {
    padding: 15px 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: background 0.3s;
    user-select: none;
}
.sql-toggle-header:hover {
    background: #f5f5f5;
}
.sql-toggle-header-left {
    display: flex;
    align-items: center;
    gap: 10px;
}
.sql-toggle-header-left i {
    color: #2196F3;
    font-size: 20px;
}
.sql-toggle-header h4 {
    margin: 0;
    font-size: 15px;
    color: #333;
}
.sql-toggle-icon {
    transition: transform 0.3s;
    color: #999;
}
.sql-toggle-icon.open {
    transform: rotate(180deg);
}
.sql-toggle-body {
    display: none;
    padding: 20px;
    border-top: 2px solid #e0e3eb;
    background: #fafafa;
}
.sql-toggle-body.open {
    display: block;
    animation: slideDown 0.3s;
}
@keyframes slideDown {
    from { opacity: 0; max-height: 0; }
    to { opacity: 1; max-height: 2000px; }
}

.sql-condition-row {
    display: flex;
    gap: 10px;
    align-items: center;
    margin-bottom: 12px;
    flex-wrap: wrap;
    background: white;
    padding: 15px;
    border-radius: 10px;
    border: 2px solid #e0e3eb;
}
.sql-condition-row > * {
    box-sizing: border-box;
}
.sql-condition-row select {
    min-width: 110px;
    flex: 0 0 auto;
}
.sql-condition-row input {
    flex: 1;
    min-width: 120px;
}

.sql-btn-small {
    padding: 10px 16px;
    font-size: 13px;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    transition: all 0.3s;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-weight: 600;
}
.sql-btn-small-primary {
    background: linear-gradient(135deg, #2196F3, #1976D2);
    color: white;
}
.sql-btn-small-primary:hover {
    background: linear-gradient(135deg, #1976D2, #1565C0);
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(33, 150, 243, 0.3);
}
.sql-btn-small-danger {
    background: linear-gradient(135deg, #f44336, #d32f2f);
    color: white;
}
.sql-btn-small-danger:hover {
    background: linear-gradient(135deg, #d32f2f, #c62828);
    transform: translateY(-2px);
}
.sql-btn-small-success {
    background: linear-gradient(135deg, #4CAF50, #388E3C);
    color: white;
}
.sql-btn-small-success:hover {
    background: linear-gradient(135deg, #388E3C, #2e7d32);
    transform: translateY(-2px);
}
.sql-btn-small-info {
    background: linear-gradient(135deg, #00BCD4, #0097A7);
    color: white;
}
.sql-btn-small-info:hover {
    background: linear-gradient(135deg, #0097A7, #00838f);
    transform: translateY(-2px);
}

.sql-condition-list {
    max-height: 300px;
    overflow-y: auto;
    padding-right: 5px;
}
.sql-condition-list::-webkit-scrollbar {
    width: 8px;
}
.sql-condition-list::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 4px;
}
.sql-condition-list::-webkit-scrollbar-thumb {
    background: linear-gradient(#2196F3, #1976D2);
    border-radius: 4px;
}

.sql-condition-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 15px;
    background: linear-gradient(to right, #fff, #f5f5f5);
    border-radius: 8px;
    margin-bottom: 10px;
    border: 2px solid #e0e3eb;
    transition: all 0.3s;
}
.sql-condition-item:hover {
    border-color: #bbdefb;
    transform: translateX(5px);
}
.sql-cond-text {
    flex: 1;
    font-size: 14px;
    color: #333;
    font-family: 'Courier New', Consolas, monospace;
    font-weight: 500;
}

.sql-select-fields {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 12px;
    background: white;
    padding: 15px;
    border-radius: 10px;
    border: 2px solid #e0e3eb;
}
.sql-field-checkbox {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 15px;
    background: #fafafa;
    border-radius: 8px;
    border: 2px solid #e0e3eb;
    cursor: pointer;
    transition: all 0.3s;
}
.sql-field-checkbox:hover {
    border-color: #2196F3;
    background: #e3f2fd;
    transform: scale(1.02);
}
.sql-field-checkbox input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: #2196F3;
}
.sql-field-checkbox label {
    cursor: pointer;
    font-size: 14px;
    color: #333;
    margin: 0;
    font-weight: 500;
}

.sql-result-area {
    width: 100%;
    min-height: 180px;
    padding: 20px;
    border: 2px solid #e0e3eb;
    border-radius: 12px;
    font-size: 15px;
    font-family: 'Courier New', Consolas, monospace;
    background: linear-gradient(to bottom, #f5f5f5, #ffffff);
    resize: vertical;
    line-height: 1.8;
    transition: all 0.3s;
}
.sql-result-area:focus {
    outline: none;
    border-color: #2196F3;
    background: white;
}

.sql-template-btn-group {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 15px;
}
.sql-template-btn {
    padding: 15px 20px;
    border: 2px solid #e0e3eb;
    border-radius: 12px;
    background: linear-gradient(to bottom, #ffffff, #f5f5f5);
    cursor: pointer;
    font-size: 14px;
    transition: all 0.3s;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 10px;
    text-align: left;
}
.sql-template-btn:hover {
    border-color: #2196F3;
    background: linear-gradient(135deg, #e3f2fd, #bbdefb);
    color: #1976D2;
    transform: translateY(-3px);
    box-shadow: 0 6px 15px rgba(33, 150, 243, 0.2);
}
.sql-template-btn i {
    font-size: 22px;
}

.sql-join-wizard {
    background: white;
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 20px;
    border: 2px solid #e0e3eb;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}
.sql-join-step {
    background: linear-gradient(to right, #f5f5f5, #ffffff);
    border-radius: 10px;
    padding: 18px;
    margin-bottom: 15px;
    border-left: 5px solid #2196F3;
}
.sql-join-step-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 15px;
}
.sql-join-step-number {
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, #2196F3, #1976D2);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 700;
    box-shadow: 0 3px 8px rgba(33, 150, 243, 0.3);
}
.sql-join-step-title {
    font-size: 15px;
    font-weight: 700;
    color: #333;
    flex: 1;
    margin-left: 12px;
}
.sql-join-remove {
    background: none;
    border: none;
    color: #f44336;
    cursor: pointer;
    padding: 8px;
    border-radius: 50%;
    transition: all 0.3s;
}
.sql-join-remove:hover {
    background: rgba(244, 67, 54, 0.1);
    transform: scale(1.1);
}
.sql-join-fields {
    display: grid;
    grid-template-columns: 1fr auto 1fr auto 1fr;
    gap: 15px;
    align-items: center;
    margin-bottom: 15px;
}
.sql-join-field-group label {
    display: block;
    font-size: 13px;
    color: #666;
    margin-bottom: 8px;
    font-weight: 600;
}
.sql-join-field-group input,
.sql-join-field-group select {
    width: 100%;
    padding: 10px 12px;
    border: 2px solid #e0e3eb;
    border-radius: 8px;
    font-size: 14px;
    transition: all 0.3s;
}
.sql-join-field-group input:focus,
.sql-join-field-group select:focus {
    outline: none;
    border-color: #2196F3;
    box-shadow: 0 0 0 3px rgba(33, 150, 243, 0.1);
}
.sql-join-icon {
    font-size: 28px;
    color: #2196F3;
    padding: 20px 0;
    background: #e3f2fd;
    border-radius: 50%;
    width: 45px;
    height: 45px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.sql-join-preview {
    background: linear-gradient(135deg, #e3f2fd, #bbdefb);
    border-radius: 8px;
    padding: 12px 18px;
    margin-top: 15px;
    font-family: 'Courier New', Consolas, monospace;
    font-size: 13px;
    color: #1565C0;
    font-weight: 500;
    border-left: 4px solid #2196F3;
}

.sql-insert-row {
    display: grid;
    grid-template-columns: 1fr 1fr auto;
    gap: 12px;
    align-items: center;
    margin-bottom: 12px;
    background: white;
    padding: 12px;
    border-radius: 10px;
    border: 2px solid #e0e3eb;
}

@media (max-width: 1024px) {
    .sql-row {
        grid-template-columns: 1fr;
    }
    .sql-join-fields {
        grid-template-columns: 1fr;
    }
    .sql-join-icon {
        justify-self: center;
    }
    .sql-template-btn-group {
        grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    }
}
@media (max-width: 768px) {
    .sql-mode-tab {
        padding: 10px 18px;
        font-size: 13px;
    }
    .sql-condition-row {
        flex-direction: column;
    }
    .sql-condition-row select,
    .sql-condition-row input {
        width: 100%;
        min-width: auto;
    }
    .sql-select-fields {
        grid-template-columns: 1fr;
    }
    .sql-insert-row {
        grid-template-columns: 1fr;
    }
    .sql-template-btn-group {
        grid-template-columns: 1fr;
    }
}