* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #1A1A1D;
    color: #E5E5E7;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    min-width: 100vw;
}

.container {
    width: 1920px;
    height: 1080px;
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    overflow: hidden;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 5px;
}

.logo-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
}

.tabs {
    display: flex;
    border-bottom: 2px solid #3D3D42;
}

.tab-button {
    padding: 12px 24px;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    color: #A0A0A8;
    border-bottom: 3px solid transparent;
    transition: all 0.3s ease;
}

.tab-button:hover {
    background-color: #3D3D42;
    color: #E5E5E7;
}

.tab-button.active {
    color: #00D9FF;
    border-bottom-color: #00D9FF;
    background-color: #2E2E33;
}

main {
    margin-top: 0;
    height: 100%;
    overflow: hidden;
}

.tab-content {
    display: none;
    height: 100%;
}

.tab-content.active {
    display: block;
    height: 100%;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    margin-bottom: 8px;
    font-weight: 600;
    color: #A0A0A8;
}

.form-group input {
    padding: 12px;
    border: 2px solid #3D3D42;
    border-radius: 6px;
    font-size: 1rem;
    background-color: #1A1A1D;
    color: #E5E5E7;
    transition: border-color 0.3s ease;
}

.form-group input:focus {
    outline: none;
    border-color: #00D9FF;
}

.status-message {
    margin: 20px 0;
    padding: 12px;
    border-radius: 6px;
    font-weight: 500;
}

.status-message.success {
    background-color: rgba(16, 185, 129, 0.1);
    color: #10B981;
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.status-message.error {
    background-color: rgba(239, 68, 68, 0.1);
    color: #EF4444;
    border: 1px solid rgba(239, 68, 68, 0.3);
}

.status-message.info {
    background-color: rgba(0, 217, 255, 0.1);
    color: #00D9FF;
    border: 1px solid rgba(0, 217, 255, 0.3);
}

.hidden {
    display: none;
}

.header-controls {
    display: flex;
    align-items: center;
    gap: 10px;
}

.tooltip,
.xgscatter-tooltip,
.gk-histogram-tooltip,
.dumbbell-tooltip,
.gkquadrant-tooltip,
.xg-voronoi-tooltip,
.heatmap-tooltip {
    position: absolute;
    padding: 8px 12px;
    background: rgba(0, 0, 0, 0.9);
    color: #E5E5E7;
    border-radius: 0px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    pointer-events: none;
    font-size: 12px;
    line-height: 1.4;
    z-index: 10000;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.5);
}

@media (max-width: 768px) {
    header {
        flex-direction: column;
        gap: 15px;
        align-items: stretch;
    }

    .tabs {
        order: 2;
    }

    .logo-placeholder {
        order: 1;
        text-align: center;
    }

    .container {
        padding: 10px;
    }
}