body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    margin: 0;
    background-color: #f4f7f6;
}

.browser-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
}

.tabs-container {
    display: flex;
    background-color: #e9ecef;
    padding: 5px 10px;
    align-items: center;
    border-bottom: 1px solid #dee2e6;
}

.tabs {
    display: flex;
    flex-grow: 1;
}

.tab {
    padding: 10px 20px;
    background-color: transparent;
    border: 1px solid transparent;
    border-bottom: none;
    cursor: pointer;
    position: relative;
    color: #495057;
}

.tab.active {
    background-color: #fff;
    border-color: #dee2e6;
    border-radius: 4px 4px 0 0;
    font-weight: 500;
}

.tab .close-tab-btn {
    position: absolute;
    top: 5px;
    right: 5px;
    cursor: pointer;
    background: none;
    border: none;
    font-weight: bold;
    color: #6c757d;
}

.add-tab-btn {
    padding: 5px 10px;
    font-size: 18px;
    cursor: pointer;
    border: 1px solid #ced4da;
    background-color: #fff;
    border-radius: 4px;
}

.main-content {
    flex-grow: 1;
    position: relative;
    background-color: #fff;
    overflow: hidden;
}

.tab-content {
    display: none;
    flex-direction: row; /* Side-by-side layout */
    height: 100%;
    width: 100%;
    position: absolute;
    box-sizing: border-box;
}

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

.autobid-panel {
    width: 300px; /* Fixed width for the control panel */
    flex-shrink: 0;
    padding: 20px;
    background-color: #f8f9fa;
    border-right: 1px solid #dee2e6;
    box-sizing: border-box;
    overflow-y: auto;
}

.browser-view {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.browser-view iframe {
    flex-grow: 1;
    border: none;
}

.url-bar {
    display: flex;
    margin-bottom: 15px;
}

.url-input {
    flex-grow: 1;
    padding: 8px;
    border: 1px solid #ced4da;
    border-radius: 4px 0 0 4px;
}

.go-btn {
    padding: 8px 12px;
    border: 1px solid #007bff;
    background-color: #007bff;
    color: white;
    cursor: pointer;
    border-radius: 0 4px 4px 0;
}

.autobid-panel h3 {
    margin-top: 0;
    margin-bottom: 20px;
    font-weight: 500;
    text-align: center;
}

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

.form-group label {
    display: block;
    margin-bottom: 5px;
    color: #495057;
    font-weight: 500;
}

.form-group input {
    width: 100%;
    padding: 10px;
    border: 1px solid #ced4da;
    border-radius: 4px;
    box-sizing: border-box; /* Important for 100% width */
}

.autobid-panel button {
    width: 100%;
    padding: 12px 15px;
    cursor: pointer;
    border: none;
    border-radius: 4px;
    background-color: #007bff; /* Blue */
    color: white;
    font-size: 16px;
    font-weight: bold;
}

.autobid-panel button.active {
    background-color: #dc3545; /* Red */
}