:root {
    --mysql: #00758f;
    --postgresql: #336791;
    --sqlite: #003b57;
    --sqlserver: #c21e39;
    --oracle: #f80000;
    --primary: #4361ee;
    --primary-dark: #3a56d4;
    --secondary: #7209b7;
    --success: #4cc9f0;
    --warning: #f8961e;
    --light: #f8f9fa;
    --dark: #212529;
    --gray: #6c757d;
    --light-gray: #e9ecef;
    --border-radius: 8px;
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: #f5f7fb;
    color: var(--dark);
    line-height: 1.6;
}

.container {
    max-width: 1600px;
    margin: 0 auto;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--light-gray);
}

.logo {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo i {
    font-size: 2.5rem;
    color: var(--primary);
}

.logo h1 {
    font-size: 2rem;
    background: linear-gradient(to right, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    font-weight: 700;
}

.app-description {
    color: var(--gray);
    max-width: 700px;
    margin-top: 5px;
}

.database-selector {
    display: flex;
    gap: 10px;
    margin-top: 15px;
    flex-wrap: wrap;
}

.db-option {
    padding: 8px 16px;
    border-radius: 20px;
    background-color: var(--light-gray);
    color: var(--dark);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
}

.db-option.active {
    color: white;
}

.db-option[data-db="mysql"].active {
    background-color: var(--mysql);
    border-color: var(--mysql);
}

.db-option[data-db="postgresql"].active {
    background-color: var(--postgresql);
    border-color: var(--postgresql);
}

.db-option[data-db="sqlite"].active {
    background-color: var(--sqlite);
    border-color: var(--sqlite);
}

.db-option[data-db="sqlserver"].active {
    background-color: var(--sqlserver);
    border-color: var(--sqlserver);
}

.db-option[data-db="oracle"].active {
    background-color: var(--oracle);
    border-color: var(--oracle);
}

.main-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

@media (max-width: 1200px) {
    .main-content {
        grid-template-columns: 1fr;
    }
}

.panel {
    background-color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    padding: 25px;
    transition: var(--transition);
}

.panel:hover {
    box-shadow: 0 6px 18px rgba(0, 0, 0, 0.1);
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--light-gray);
}

.panel-title {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--dark);
}

.btn {
    padding: 10px 20px;
    border-radius: var(--border-radius);
    border: none;
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: var(--light-gray);
    color: var(--dark);
}

.btn-secondary:hover {
    background-color: #dde1e7;
}

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

.btn-success:hover {
    background-color: #3db5d8;
}

.btn-warning {
    background-color: var(--warning);
    color: white;
}

.btn-warning:hover {
    background-color: #e68a19;
}

.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
}

.form-control {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--light-gray);
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.2);
}

.advanced-options {
    background-color: #f8f9fa;
    padding: 15px;
    border-radius: var(--border-radius);
    margin-top: 20px;
    display: none;
}

.advanced-options.show {
    display: block;
}

.toggle-advanced {
    background: none;
    border: none;
    color: var(--primary);
    cursor: pointer;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 5px;
    margin-top: 10px;
}

.table-section {
    margin-top: 25px;
}

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

.table-title {
    font-size: 1.2rem;
    font-weight: 600;
}

.table-container {
    overflow-x: auto;
    border-radius: var(--border-radius);
    border: 1px solid var(--light-gray);
}

table {
    width: 100%;
    border-collapse: collapse;
}

th {
    background-color: var(--light-gray);
    padding: 15px;
    text-align: left;
    font-weight: 600;
    border-bottom: 2px solid #d1d9e6;
}

td {
    padding: 15px;
    border-bottom: 1px solid var(--light-gray);
}

tr:hover {
    background-color: #f8f9fa;
}

.field-row {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 15px;
    padding: 15px;
    background-color: #f8f9fa;
    border-radius: var(--border-radius);
}

.field-name {
    flex: 2;
}

.field-type {
    flex: 1.5;
}

.field-actions {
    flex: 1;
    display: flex;
    gap: 10px;
    align-items: center;
}

.delete-field {
    background-color: #ff6b6b;
    color: white;
    border: none;
    border-radius: 50%;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
}

.delete-field:hover {
    background-color: #ff5252;
}

.constraint-badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 5px 10px;
    background-color: #e9ecef;
    border-radius: 20px;
    font-size: 0.8rem;
    margin-right: 5px;
    cursor: pointer;
}

.constraint-badge.active {
    background-color: var(--primary);
    color: white;
}

.sql-preview {
    background-color: #1a1a1a;
    color: #f8f8f2;
    padding: 20px;
    border-radius: var(--border-radius);
    font-family: 'Courier New', monospace;
    font-size: 0.95rem;
    line-height: 1.5;
    white-space: pre-wrap;
    overflow-x: auto;
    max-height: 500px;
    overflow-y: auto;
}

.keyword {
    color: #f92672;
}

.function {
    color: #66d9ef;
}

.string {
    color: #a6e22e;
}

.comment {
    color: #6a9955;
}

.export-options {
    display: flex;
    gap: 15px;
    margin-top: 25px;
    flex-wrap: wrap;
}

.export-btn {
    flex: 1;
    min-width: 150px;
}

.notification {
    position: fixed;
    bottom: 20px;
    right: 20px;
    padding: 15px 25px;
    background-color: var(--primary);
    color: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    transform: translateY(100px);
    opacity: 0;
    transition: var(--transition);
    z-index: 1000;
}

.notification.show {
    transform: translateY(0);
    opacity: 1;
}

.sample-databases {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 15px;
    margin-top: 20px;
}

.sample-db {
    padding: 20px;
    background-color: #f8f9fa;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
}

.sample-db:hover {
    border-color: var(--primary);
    transform: translateY(-3px);
}

.sample-db h4 {
    margin-bottom: 10px;
    color: var(--dark);
}

.sample-db p {
    font-size: 0.9rem;
    color: var(--gray);
}

.database-features {
    display: flex;
    gap: 20px;
    margin-top: 20px;
    flex-wrap: wrap;
}

.db-feature {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 15px;
    background-color: #e9ecef;
    border-radius: 20px;
    font-size: 0.9rem;
}

footer {
    text-align: center;
    padding: 20px;
    color: var(--gray);
    border-top: 1px solid var(--light-gray);
}

.tab-navigation {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--light-gray);
    padding-bottom: 10px;
}

.tab {
    padding: 10px 20px;
    background: none;
    border: none;
    border-bottom: 3px solid transparent;
    cursor: pointer;
    font-weight: 600;
    color: var(--gray);
    transition: var(--transition);
}

.tab.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

.badge {
    display: inline-block;
    padding: 5px 10px;
    background-color: var(--secondary);
    color: white;
    border-radius: 20px;
    font-size: 0.8rem;
    margin-left: 10px;
}

.db-info {
    padding: 15px;
    background-color: #f0f7ff;
    border-radius: var(--border-radius);
    margin-bottom: 20px;
    border-left: 4px solid var(--primary);
}

.foreign-key-section {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px dashed var(--light-gray);
}