/*
    --------------------------------------------------------
    1. Base Styles (Unchanged)
    --------------------------------------------------------
*/
html,
body {
    height: 100%;
}

#right-panel-top {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-grow: 1;
    min-height: 0;
    padding: 1rem;
    overflow: hidden;
    box-sizing: border-box;
}

#canvas-container {
    position: relative;
    cursor: default;
    flex-shrink: 0;
}

#signalCanvas {
    display: block;
    width: 100%;
    height: 100%;
}

#right-panel-top>.flex-grow-1 {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-grow: 1;
    min-height: 0;
}

.legend-button {
    background: none;
    border: none;
    color: inherit;
    padding: 0;
    width: 100%;
    text-align: left;
    transition: color 0.2s ease;
}

[data-bs-toggle="collapse"] .legend-button .bi {
    transition: transform 0.2s ease-in-out;
    display: inline-block;
}

[data-bs-toggle="collapse"][aria-expanded="true"] .legend-button .bi {
    transform: rotate(-180deg);
}

.object-name:focus {
    outline: none;
    box-shadow: 0 0 0 2px var(--bs-primary);
}

#main-split {
    display: flex;
    flex-direction: row;
}

.editable-name-area {
    padding: 2px 6px;
    border-radius: 5px;
    transition: background-color 0.2s ease-in-out;
}

.editable-name-area:hover {
    cursor: text;
    background-color: var(--bs-tertiary-bg);
}

.editable-name-area .bi-pencil-fill {
    opacity: 0.5;
    transition: opacity 0.2s ease-in-out;
}

.editable-name-area:hover .bi-pencil-fill {
    opacity: 1;
}

.form-range::-webkit-slider-runnable-track {
    background-color: var(--bs-border-color);
}

.form-range::-moz-range-track {
    background-color: var(--bs-border-color);
}

[data-bs-toggle="collapse"] {
    user-select: none;
}

/* -------------------------------------------------------- */
/* 2. Dark Theme (Default) Toolbar Styles (Unchanged)       */
/* -------------------------------------------------------- */

/* The solid effect is applied below in the light theme block. 
   These remain for the dark theme's default outline appearance. */
#toolbar .btn.btn-outline-secondary:not([disabled]) {
    --bs-btn-border-color: var(--bs-gray-600);
    --bs-btn-color: var(--bs-gray-400);
}

#toolbar .btn.btn-outline-secondary:not([disabled]):hover {
    background-color: var(--bs-primary);
    border-color: var(--bs-primary);
    color: var(--bs-light);
}

#pixel-editor-grid-container {
    display: grid;
    grid-gap: 1px;
    border: 1px solid #444;
}

.pixel-editor-cell {
    width: 100%;
    padding-bottom: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    position: relative;
}

.notification-read {
    opacity: 0.6;
    background-color: #343a40;
}

.notification-read .text-danger {
    opacity: 0.7;
}

/* -------------------------------------------------------- */
/* 3. Custom Control Styles (Unchanged for dark defaults)   */
/* -------------------------------------------------------- */

.gradient-picker-container {
    position: relative;
    user-select: none;
    touch-action: none;
}

.gradient-preview-bar {
    width: 100%;
    height: 30px;
    border-radius: 4px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    background-image:
        linear-gradient(45deg, #444 25%, transparent 25%),
        linear-gradient(-45deg, #444 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, #444 75%),
        linear-gradient(-45deg, transparent 75%, #444 75%);
    background-size: 16px 16px;
    background-position: 0 0, 0 8px, 8px -8px, -8px 0px;
    position: relative;
}

.gradient-preview-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: 4px;
}

.gradient-stops-container {
    position: relative;
    height: 20px;
    margin-top: 2px;
    cursor: pointer;
}

.gradient-stop-marker {
    position: absolute;
    top: 0;
    width: 25px;
    height: 25px;
    border: 2px solid #000;
    border-radius: 50%;
    transform: translateX(-50%);
    cursor: grab;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.5);
    transition: transform 0.1s ease-out, border-color 0.1s ease-out;
}

.gradient-stop-marker.active {
    border-color: #ffffff;
    transform: translateX(-50%) scale(1.0);
    z-index: 10;
}

.gradient-active-stop-controls {
    margin-top: 10px;
    padding: 10px;
    background-color: rgba(0, 0, 0, 0.2);
    border-radius: 6px;
}

.node-table {
    --bs-table-bg: var(--bs-body-bg);
}

/* -------------------------------------------------------- */
/* 4. HIGH-CONTRAST LIGHT THEME OVERRIDES                   */
/* -------------------------------------------------------- */

[data-bs-theme="light"] {
    /* Define High-Contrast Colors: Light Gray for Panels, Pure White for Inputs */
    --bs-body-bg-custom: var(--bs-gray-200);      /* Light Gray for #left-panel, #toolbar, bg-body-tertiary */
    --bs-body-bg-custom-lighter: #fff;           /* Pure White for inner content, inputs */
    --bs-border-color-strong: var(--bs-gray-500); /* Darker border for controls */
    --bs-text-color-dark: var(--bs-gray-900);     /* Dark text */
    
    /* NEW: Define a prominent dark color for the Authentication Group area */
    --bs-auth-fill: var(--bs-gray-700); 

    /* Apply Custom Backgrounds for Panel and Headers */
    #left-panel, #toolbar, .bg-body-tertiary {
        background-color: var(--bs-body-bg-custom) !important;
    }
    
    /* Stronger Border for all Fieldsets/Borders */
    .border {
        border-color: var(--bs-border-color-strong) !important;
    }

    /* Input/Select Contrast */
    .form-control, .form-select, .input-group-text, .card-body {
        border-color: var(--bs-border-color-strong) !important;
        background-color: var(--bs-body-bg-custom-lighter) !important;
        color: var(--bs-text-color-dark) !important; 
    }
    
    /* FIX 1: Pixel Editor Contrast */
    #pixel-editor-grid-container {
        border: 1px solid var(--bs-gray-700); /* Very dark border around the grid */
    }
    
    /* FIX 2: Transparent Pixel Cells (Clearer Checkerboard) */
    .pixel-editor-cell {
        background-color: rgba(0, 0, 0, 0.15); 
    }

    /* FIX 3: Gradient Preview Bar - Use Darkest Grays for Checkerboard */
    .gradient-preview-bar {
        border-color: var(--bs-border-color-strong);
        background-image:
            linear-gradient(45deg, var(--bs-gray-400) 25%, transparent 25%),
            linear-gradient(-45deg, var(--bs-gray-400) 25%, transparent 25%),
            linear-gradient(45deg, transparent 75%, var(--bs-gray-400) 75%),
            linear-gradient(-45deg, transparent 75%, var(--bs-gray-400) 75%);
    }

    /* FIX 4 & 5: Gradient Marker Contrast */
    .gradient-stop-marker {
        border-color: var(--bs-gray-900); /* Dark border for visibility */
        box-shadow: 0 1px 3px rgba(0, 0, 0, 0.4);
    }
    
    .gradient-stop-marker.active {
        border-color: var(--bs-primary); /* Strong color for active state */
    }

    /* FIX 6: Gradient Active Controls Background (Distinct, clean background) */
    .gradient-active-stop-controls {
        background-color: var(--bs-body-bg-custom-lighter);
        border: 1px solid var(--bs-border-color-strong);
        box-shadow: inset 0 0 5px rgba(0, 0, 0, 0.1);
    }
    
    /* FIX 7: Polyline Node Table (Clear White Table with Stronger Borders) */
    .node-table {
        --bs-table-bg: var(--bs-body-bg-custom-lighter);
        --bs-table-color: var(--bs-text-color-dark);
        --bs-table-border-color: var(--bs-border-color-strong);
    }

    /* FIX 8: Control Group Header/Background */
    .bg-body-tertiary {
        background-color: var(--bs-body-bg-custom) !important;
    }
    
    /* FIX 9: Notification Read Item (Clear background for high contrast) */
    .notification-read {
        background-color: var(--bs-gray-200); 
        opacity: 1; 
    }
    
    /* -------------------------------------------------------- */
    /* CRITICAL FIX: Make TOOLBAR BUTTONS SOLID in Light Theme  */
    /* -------------------------------------------------------- */

    #toolbar .btn.btn-outline-secondary {
        /* Set base appearance to be a filled button */
        --bs-btn-bg: var(--bs-gray-300);              /* Light gray background */
        --bs-btn-border-color: var(--bs-gray-400);    /* Clear border */
        --bs-btn-color: var(--bs-gray-900);           /* Dark text/icon color */
    }

    #toolbar .btn.btn-outline-secondary:hover:not([disabled]),
    #toolbar .btn.btn-outline-secondary:active:not([disabled]) {
        /* Increase contrast and give feedback on hover/active */
        --bs-btn-bg: var(--bs-gray-400);              
        --bs-btn-border-color: var(--bs-gray-500);    
        --bs-btn-color: var(--bs-gray-900);           
    }
    
    /* Ensure the Constrain button's 'on' state (btn-secondary) remains solid and prominent */
    #toolbar .btn.btn-secondary {
        --bs-btn-bg: var(--bs-gray-600);
        --bs-btn-border-color: var(--bs-gray-600);
        --bs-btn-color: #fff;
    }
}

/* -------------------------------------------------------- */
/* 5. Utility and Layout (Unchanged)                        */
/* -------------------------------------------------------- */

.color-picker-swatch {
    width: 100%; height: 2.375rem; border: 1px solid var(--bs-border-color);
    border-radius: var(--bs-border-radius); cursor: pointer;
}

#modal-picker-container {
    width: 240px; height: 240px;
}

.gradient-active-stop-controls > .d-flex > .d-flex {
    align-items: center !important;
}

#left-panel {
    width: 650px;
    flex-shrink: 0;
}

#right-panel {
    flex-grow: 1;
    min-width: 0;
}

.gradient-stop-marker.is-dragging {
    transition: none !important;
}