/* --- 1. Global & Font Setup --- */
:root {
    --primary-color: #007bff;
    --primary-hover: #0056b3;
    --run-color: #28a745;
    --run-hover: #1e7e34;
    --pause-color: #fd7e14;
    --pause-hover: #d36307;
    --reset-color: #dc3545;
    --reset-hover: #b02a37;
    --delete-color: #dc3545;
    --delete-hover: #b02a37;
    --ai-color: #6f42c1;
    --ai-hover: #5a32a3;

    /* --- Cheerful Button Colors --- */
    --select-color: #007bff;
    --select-hover: #0056b3;
    --wire-color: #fd7e14;
    --wire-hover: #d36307;
    --io-color: #17a2b8; /* Teal */
    --io-hover: #117a8b;
    --gate-color: #28a745; /* Green */
    --gate-hover: #1e7e34;
    --export-color: #6c757d; /* Grey */
    --export-hover: #5a6268;
    
    /* --- MODIFIED: Added new colors for Properties and Auth --- */
    --save-color: #007bff; /* Same as select */
    --save-hover: #0056b3;
    --load-color: #20c997; /* New Mint color */
    --load-hover: #17a77e;
    
    --props-color: #20c997; /* Mint color */
    --props-hover: #17a77e;
    --auth-color: #17a2b8; /* Teal color */
    --auth-hover: #117a8b;
    /* --- --- */

    --bg-light: #ffffff;
    --bg-medium: #f8f9fa;
    --bg-dark: #e9ecef;
    --border-color: #dee2e6;
    --text-color: #333;
    --text-muted: #6c757d;
    --log-step-color: #007bff;
    --log-calc-color: #28a745;
    --log-error-color: #dc3545;
}

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

body, html {
    width: 100%;
    height: 100%;
    overflow: hidden; /* Prevent body scrollbars */
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-medium);
    color: var(--text-color);
    -webkit-font-smoothing: antialiased; /* Smoother fonts */
    -moz-osx-font-smoothing: grayscale;
}

h2 { /* Toolbar Header */
    color: var(--text-muted);
    padding-left: 10px;
    margin-bottom: 8px;
    font-size: 1.1rem;
    margin-top: 10px;
    user-select: none;
}

h3 { /* Generic Section Header - used in Toolbar and Log */
    font-size: 0.8rem;
    text-transform: uppercase;
    font-weight: 600;
    color: var(--text-muted);
    margin-top: 15px; /* Spacing between sections */
    padding-bottom: 5px;
    user-select: none;
}

/* --- 1b. NEW: Splash Screen Styles --- */
#splash-screen {
    width: 100%;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--bg-light);
    transition: opacity 0.3s ease-out;
}

#splash-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 20px;
}

#splash-title {
    font-size: 3rem;
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: 20px;
}

#splash-loading {
    font-size: 1.1rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 10px;
}
/* Make the loader icon spin */
#splash-loading i {
    width: 20px;
    height: 20px;
    animation: spin 1.5s linear infinite;
}

#splash-login-btn {
    font-size: 1.1rem;
    font-weight: 600;
    color: white;
    background-color: var(--primary-color);
    border: none;
    border-radius: 8px;
    padding: 12px 24px;
    margin-top: 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 10px;
    transition: background-color 0.2s ease;
}
#splash-login-btn:hover {
    background-color: var(--primary-hover);
}
#splash-login-btn i {
    width: 20px;
    height: 20px;
}

#splash-error {
    font-size: 0.9rem;
    color: var(--log-error-color);
    margin-top: 20px;
    font-weight: 500;
}
/* --- --- */


/* --- 2. Main Layout --- */
.app-container {
    /* --- MODIFIED: Hide app by default --- */
    display: none; 
    /* --- --- */
    width: 100%;
    height: 100vh; /* Use viewport height */
    opacity: 0; /* For fade-in */
    transition: opacity 0.3s ease-in;
}

/* --- NEW: Class to show the app --- */
.app-container.app-visible {
    display: flex;
    opacity: 1;
}
/* --- --- */

.toolbar {
    width: 200px;
    min-width: 180px; /* Prevent shrinking too much */
    background-color: var(--bg-light);
    border-right: 1px solid var(--border-color);
    padding: 0 10px 10px 10px; /* Add bottom padding */
    overflow-y: auto; /* Allow toolbar scrolling if needed */
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
}

.toolbar-header {
    flex-shrink: 0; /* Keep header visible */
    position: sticky; /* Make header stick slightly */
    top: 0;
    background-color: var(--bg-light); /* Needed for sticky */
    z-index: 10;
    padding-top: 5px;
}

.main-content {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden; /* Prevent content spilling */
    background-color: var(--bg-dark); /* Darker background for main area */
}

#canvas-wrapper {
    flex-grow: 1; /* Takes up space between log and status */
    position: relative; /* Needed for absolute positioning of canvas */
    background-color: var(--bg-light); /* Fallback/border color */
    /* --- VIRTUAL CANVAS FIX --- */
    overflow: hidden; /* We handle panning in JS, not with scrollbars */
    /* --- --- */
    -webkit-overflow-scrolling: touch; 
}

#simulation-canvas {
    display: block;
    background-color: #fff;
    /* --- VIRTUAL CANVAS FIX --- */
    /* --- MODIFIED: Ensure it fills the wrapper --- */
    width: 100%;
    height: 100%;
    /* --- --- */
}


/* --- 3. Toolbar Sections (Collapsible) --- */
.tool-section {
    margin-bottom: 0; /* Remove bottom margin, rely on header margin */
    flex-shrink: 0;
}

.collapsible-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    user-select: none;
    padding: 8px 0 8px 10px; /* Consistent padding */
    margin-top: 10px; /* Spacing above header */
    border-bottom: 1px solid var(--border-color);
    transition: background-color 0.15s ease;
}
.collapsible-header:hover {
    background-color: var(--bg-dark);
}

.collapse-icon {
    font-size: 0.7rem;
    transition: transform 0.2s ease;
    margin-right: 5px;
    color: var(--text-muted);
}

/* Style for when section is collapsed */
.tool-section.collapsed .collapse-icon {
    transform: rotate(-90deg);
}
.tool-section.collapsed .tool-section-content {
    /* Use max-height for smooth transition */
    max-height: 0;
    overflow: hidden;
    padding-top: 0;
    opacity: 0;
}

.tool-section-content {
    padding-top: 10px; /* Space above buttons */
    /* Smooth transition for collapsing/expanding */
    max-height: 1000px; /* Large enough for content */
    opacity: 1;
    overflow: hidden;
    transition: max-height 0.3s ease-out, padding-top 0.3s ease-out, opacity 0.2s ease-in;
}


/* --- 4. Tool Buttons Styling --- */
.tool-button {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 65px;
    padding: 8px 4px;
    margin-bottom: 5px;
    background-color: var(--bg-medium);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-color);
    font-size: 0.75rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    user-select: none; /* Prevent text selection on buttons */
}

/* Make icon and text ignore pointer events so click goes to button */
.tool-button i,
.tool-button span {
    pointer-events: none;
}
.tool-button i {
    width: 24px;
    height: 24px;
    margin-bottom: 5px;
}

.tool-button:hover {
    background-color: var(--bg-dark);
    border-color: #adb5bd; /* Slightly darker border on hover */
}

.tool-button.active {
    background-color: var(--primary-color);
    border-color: var(--primary-hover);
    color: white;
}
.tool-button.active i { color: white; } /* Ensure icon inherits color */

/* Special button styles */
.tool-button.tool-delete:hover,
.tool-button.tool-delete.active {
    background-color: var(--delete-color);
    border-color: var(--delete-hover);
    color: white;
}
.tool-button.tool-delete.active i { color: white; }

.tool-button.tool-ai { border-color: var(--ai-color); color: var(--ai-color); }
.tool-button.tool-ai:hover,
.tool-button.tool-ai.active {
    background-color: var(--ai-hover);
    border-color: var(--ai-hover);
    color: white;
}
.tool-button.tool-ai.active i { color: white; }

/* --- 4b. Cheerful Tool Button Colors --- */

/* Select Tool (Primary Blue) */
.tool-button[data-tool="SELECT"] { border-color: var(--select-color); color: var(--select-color); }
.tool-button[data-tool="SELECT"]:hover,
.tool-button[data-tool="SELECT"].active {
    background-color: var(--select-hover);
    border-color: var(--select-hover);
    color: white;
}
.tool-button[data-tool="SELECT"].active i { color: white; }


/* Wire Tool (Orange) */
.tool-button[data-tool="WIRE"] { border-color: var(--wire-color); color: var(--wire-color); }
.tool-button[data-tool="WIRE"]:hover,
.tool-button[data-tool="WIRE"].active {
    background-color: var(--wire-hover);
    border-color: var(--wire-hover);
    color: white;
}
.tool-button[data-tool="WIRE"].active i { color: white; }

/* --- NEW: Properties Tool (Mint) --- */
.tool-button[data-tool="PROPERTIES"] { border-color: var(--props-color); color: var(--props-color); }
.tool-button[data-tool="PROPERTIES"]:hover,
.tool-button[data-tool="PROPERTIES"].active {
    background-color: var(--props-hover);
    border-color: var(--props-hover);
    color: white;
}
.tool-button[data-tool="PROPERTIES"].active i { color: white; }

/* Input/Output Tools (Teal) */
.tool-button[data-tool="INPUT"],
.tool-button[data-tool="OUTPUT"] { border-color: var(--io-color); color: var(--io-color); }
.tool-button[data-tool="INPUT"]:hover,
.tool-button[data-tool="INPUT"].active,
.tool-button[data-tool="OUTPUT"]:hover,
.tool-button[data-tool="OUTPUT"].active {
    background-color: var(--io-hover);
    border-color: var(--io-hover);
    color: white;
}
.tool-button[data-tool="INPUT"].active i,
.tool-button[data-tool="OUTPUT"].active i { color: white; }

/* Gate Tools (Green) */
.tool-button[data-tool="NOT"],
.tool-button[data-tool="AND"],
.tool-button[data-tool="OR"],
.tool-button[data-tool="XOR"],
.tool-button[data-tool="NAND"],
.tool-button[data-tool="NOR"],
.tool-button[data-tool="XNOR"] { border-color: var(--gate-color); color: var(--gate-color); }

.tool-button[data-tool="NOT"]:hover,
.tool-button[data-tool="NOT"].active,
.tool-button[data-tool="AND"]:hover,
.tool-button[data-tool="AND"].active,
.tool-button[data-tool="OR"]:hover,
.tool-button[data-tool="OR"].active,
.tool-button[data-tool="XOR"]:hover,
.tool-button[data-tool="XOR"].active,
.tool-button[data-tool="NAND"]:hover,
.tool-button[data-tool="NAND"].active,
.tool-button[data-tool="NOR"]:hover,
.tool-button[data-tool="NOR"].active,
.tool-button[data-tool="XNOR"]:hover,
.tool-button[data-tool="XNOR"].active {
    background-color: var(--gate-hover);
    border-color: var(--gate-hover);
    color: white;
}
.tool-button[data-tool="NOT"].active i,
.tool-button[data-tool="AND"].active i,
.tool-button[data-tool="OR"].active i,
.tool-button[data-tool="XOR"].active i,
.tool-button[data-tool="NAND"].active i,
.tool-button[data-tool="NOR"].active i,
.tool-button[data-tool="XNOR"].active i { color: white; }

/* Export Button (Grey) */
#export-png-btn { border-color: var(--export-color); color: var(--export-color); }
#export-png-btn:hover {
    background-color: var(--export-hover);
    border-color: var(--export-hover);
    color: white;
}

/* --- NEW: Auth Button (Teal) --- */
#auth-btn { border-color: var(--auth-color); color: var(--auth-color); }
#auth-btn:hover {
    background-color: var(--auth-hover);
    border-color: var(--auth-hover);
    color: white;
}

/* --- NEW: Save/Load Button Colors --- */
#save-circuit-btn { border-color: var(--save-color); color: var(--save-color); }
#save-circuit-btn:hover {
    background-color: var(--save-hover);
    border-color: var(--save-hover);
    color: white;
}
#load-circuit-btn { border-color: var(--load-color); color: var(--load-color); }
#load-circuit-btn:hover {
    background-color: var(--load-hover);
    border-color: var(--load-hover);
    color: white;
}

/* --- 5. Log Panel & Sim Controls (UPDATED Layout) --- */
#log-wrapper {
    /* Make log smaller */
    height: 100px; /* Reduced height */
    flex-shrink: 0; /* Prevent shrinking */
    background-color: var(--bg-light);
    border-top: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.log-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 10px; /* Padding for header only */
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
    height: 40px; /* Give header a fixed height */
}

.log-header h3 {
    margin: 0; /* Remove default margins */
    padding: 0;
    border-bottom: none;
    font-size: 0.75rem; /* Smaller header */
    color: var(--text-muted);
}

.sim-controls {
    display: flex;
    align-items: center;
}

/* Make sim buttons slightly smaller */
.sim-button {
    width: 28px; /* Smaller */
    height: 28px; /* Smaller */
    margin-left: 8px; /* Use margin-left for spacing */
    margin-right: 0;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0; /* Remove padding if any */
}

.sim-button i {
    width: 14px; /* Smaller icon */
    height: 14px;
    color: white;
}

/* Sim button colors (no change) */
.sim-button.run { background-color: var(--run-color); }
.sim-button.run:hover { background-color: var(--run-hover); }
.sim-button.pause { background-color: var(--pause-color); }
.sim-button.pause:hover { background-color: var(--pause-hover); }
.sim-button.reset { background-color: var(--reset-color); }
.sim-button.reset:hover { background-color: var(--reset-hover); }
/* --- NEW: AI-themed sim button --- */
.sim-button.ai { background-color: var(--ai-color); }
.sim-button.ai:hover { background-color: var(--ai-hover); }


#log-content {
    flex-grow: 1; /* Fill remaining space in wrapper */
    overflow-y: auto; /* Enable vertical scroll */
    padding: 8px 10px; /* Adjust padding */
    font-size: 0.75rem; /* Even smaller font */
    font-family: "Menlo", "Consolas", "Courier New", Courier, monospace; /* Monospace for logs */
    line-height: 1.4;
    background-color: var(--bg-medium); /* Slightly different background */
}

/* Log entry styling (minor adjustments) */
.log-entry { padding: 1px 5px; margin-bottom: 2px; border-radius: 3px; }
.log-step { color: var(--log-step-color); font-weight: bold; }
.log-calc { color: var(--log-calc-color); }
.log-error { color: var(--log-error-color); background-color: #ffebee; font-weight: bold; }
.log-entry code { background-color: var(--bg-dark); padding: 1px 4px; border-radius: 3px; font-size: 0.7rem;}


/* --- 6. Status Bar --- */
.status-bar {
    height: 30px; /* Smaller */
    background-color: var(--bg-light);
    border-top: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 15px;
    flex-shrink: 0;
}

#status-text {
    font-size: 0.75rem; /* Smaller */
    color: var(--text-muted);
}

/* --- 7. AI Modal Styles (Unchanged) --- */
.hidden { display: none !important; }
#ai-modal-backdrop { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background-color: rgba(0, 0, 0, 0.6); display: flex; align-items: center; justify-content: center; z-index: 1000; }
#ai-modal { width: 90%; max-width: 600px; max-height: 80vh; background-color: var(--bg-light); border-radius: 12px; box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2); display: flex; flex-direction: column; overflow: hidden; }
.ai-header { display: flex; align-items: center; justify-content: space-between; padding: 12px 15px; background-color: var(--bg-medium); border-bottom: 1px solid var(--border-color); flex-shrink: 0; }
.ai-header h3 { margin: 0; border: none; padding: 0; font-size: 1.1rem; color: var(--text-color); display: flex; align-items: center; }
.ai-header h3 i { width: 20px; height: 20px; margin-right: 8px; color: var(--ai-color); }
.ai-close { background: none; border: none; cursor: pointer; padding: 5px; border-radius: 50%; display: flex; align-items: center; justify-content: center; }
.ai-close:hover { background-color: var(--bg-dark); }
.ai-close i { width: 20px; height: 20px; color: var(--text-muted); }
#ai-chat-history { flex-grow: 1; overflow-y: auto; padding: 15px; display: flex; flex-direction: column; gap: 12px; }
.ai-message { padding: 10px 14px; border-radius: 18px; line-height: 1.5; max-width: 85%; word-wrap: break-word; font-size: 0.9rem; }
.ai-message.assistant { background-color: var(--bg-dark); border-bottom-left-radius: 4px; align-self: flex-start; }
.ai-message.user { background-color: var(--primary-color); color: white; border-bottom-right-radius: 4px; align-self: flex-end; }
#ai-input-area { display: flex; align-items: flex-end; padding: 10px; border-top: 1px solid var(--border-color); flex-shrink: 0; }
#ai-prompt-input { flex-grow: 1; border: 1px solid var(--border-color); border-radius: 20px; padding: 10px 15px; font-size: 0.9rem; font-family: inherit; resize: none; max-height: 100px; overflow-y: auto; line-height: 1.4; }
#ai-prompt-input:focus { outline: none; border-color: var(--primary-color); box-shadow: 0 0 0 2px rgba(0,123,255,0.25); }
#ai-send-btn { flex-shrink: 0; width: 40px; height: 40px; border: none; background-color: var(--primary-color); color: white; border-radius: 50%; margin-left: 8px; cursor: pointer; display: flex; align-items: center; justify-content: center; transition: background-color 0.2s ease; }
#ai-send-btn:hover { background-color: var(--primary-hover); }
#ai-send-btn:disabled { background-color: #a0cfff; cursor: default; }
#ai-send-btn i { width: 20px; height: 20px; }
#ai-status { padding: 5px 15px 10px 15px; font-size: 0.8rem; color: var(--text-muted); display: flex; align-items: center; gap: 8px; flex-shrink: 0; min-height: 25px; }
#ai-status i { width: 14px; height: 14px; }
#ai-loading i { animation: spin 1s linear infinite; }
#ai-error { color: var(--log-error-color); font-weight: bold;}
@keyframes spin { from { transform: rotate(0deg); } to { transform: rotate(360deg); } }

/* --- 8. NEW: Floating Properties Popup --- */

#properties-popup {
    position: absolute; /* Positioned relative to the #canvas-wrapper */
    background-color: rgba(255, 255, 255, 0.9); /* Cheerful, slightly transparent */
    backdrop-filter: blur(5px); /* Frosted glass effect */
    border: 1px solid var(--border-color);
    border-radius: 12px; /* Nicely rounded */
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    z-index: 5;
    padding: 12px;
    width: 220px;
    /* --- Pop-in animation --- */
    transform: scale(0.95);
    opacity: 0;
    transition: transform 0.15s ease-out, opacity 0.15s ease-out;
    pointer-events: none; /* Allows clicking "through" it when hidden */
}

#properties-popup.visible {
    transform: scale(1);
    opacity: 1;
    pointer-events: auto; /* Allow interaction when visible */
}

/* --- 9. NEW: Popup Content Styles --- */

/* Clearer, more "designed" property rows */
.prop-row {
    display: flex;
    flex-direction: column; /* Stack label on top of input */
    margin-bottom: 12px;
}
.prop-row:last-child {
    margin-bottom: 0;
}

.prop-row label {
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    margin-bottom: 4px;
}

/* Style for inputs and selects */
.prop-row input[type="text"],
.prop-row select {
    width: 100%;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 8px 10px;
    font-size: 0.85rem;
    font-family: inherit;
    background-color: var(--bg-light); /* Solid background */
}

.prop-row input[type="text"]:focus,
.prop-row select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(0,123,255,0.25);
}


/* Optional: Style scrollbars for a cleaner look (WebKit browsers) */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: var(--bg-medium); }
::-webkit-scrollbar-thumb { background: #ccc; border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: #aaa; }


/* --- 10. NEW: Responsive (Mobile) Styles --- */
@media (max-width: 768px) {
    .app-container {
        flex-direction: column; /* Stack main content on top of toolbar */
    }

    .main-content {
        order: 1; /* Show main content first */
        flex-grow: 1; 
        overflow: hidden; 
    }
    
    .toolbar {
        order: 2; /* Show toolbar at the bottom */
        width: 100%;
        min-width: 100%;
        height: auto; /* --- MODIFIED: Auto height based on content --- */
        max-height: 40vh; /* But don't let it take over */
        border-right: none;
        border-top: 1px solid var(--border-color);
        overflow-y: auto; /* --- MODIFIED: Allow vertical scroll if sections open --- */
        overflow-x: hidden;
        padding: 0 5px 5px 5px; /* Adjust padding for mobile */
    }
    
    .tool-section {
        flex-shrink: 0;
    }
    
    .collapsible-header {
         padding: 10px 8px; /* Bigger tap target */
         margin-top: 5px;
    }
    
    .tool-section-content {
        display: flex;
        flex-direction: row; /* --- MODIFIED: Lay out buttons in a row --- */
        overflow-x: auto; /* --- MODIFIED: Allow horizontal scrolling for buttons --- */
     overflow-y: hidden;
        padding-top: 5px;
        padding-bottom: 5px; /* Add padding for scrollbar */
    }
    
    /* Give buttons a fixed width so they scroll nicely */
    .tool-button {
        flex: 0 0 75px; /* --- MODIFIED: Fixed width, don't grow or shrink --- */
        width: 75px;
        height: 60px; /* Slightly shorter */
        margin-right: 5px; /* Space between buttons */
        margin-bottom: 0;
    }
    .tool-button span {
        font-size: 0.7rem; /* Slightly smaller text */
    }
    .tool-button i {
        width: 20px;
        height: 20px;
    }
    
    /* Make log wrapper and controls smaller */
    #log-wrapper {
        height: 80px; 
    }
    .log-header {
        height: 35px;
    }
    .log-header h3 {
        font-size: 0.7rem;
    }
    .sim-button {
        width: 24px;
        height: 24px;
        margin-left: 6px;
    }
    .sim-button i {
        width: 12px;
        height: 12px;
    }
    
    /* Make status bar smaller */
    .status-bar {
        height: 25px;
        padding: 0 10px;
    }
    #status-text {
        font-size: 0.7rem;
    }
    
    /* Make AI modal full-width on small screens */
    #ai-modal {
        width: 95%;
        max-height: 90vh; /* Allow more vertical space */
    }
    
    #properties-popup {
        width: 180px; /* Smaller popup */
        padding: 10px;
    }
    .prop-row input[type="text"], .prop-row select {
        padding: 6px 8px;
        font-size: 0.8rem;
    }

    /* --- NEW: Mobile Splash Screen --- */
    #splash-title {
        font-size: 2.5rem;
    }
    #splash-login-btn {
        font-size: 1rem;
        padding: 10px 20px;
    }
    /* --- --- */
}

/* --- 11. NEW: Save/Load Modal Styles --- */

/* Generic backdrop for all new modals */
#save-modal-backdrop,
#load-modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    /* Use the same style as the AI modal */
    background-color: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(5px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    /* --- NEW: Fade-in animation --- */
    opacity: 0;
    transition: opacity 0.2s ease;
    pointer-events: none;
}
/* Show animation */
#save-modal-backdrop:not(.hidden),
#load-modal-backdrop:not(.hidden) {
    opacity: 1;
    pointer-events: auto;
}

/* Generic dialog box */
.modal-dialog {
    width: 90%;
    max-width: 450px; /* Slightly smaller than AI modal */
    background-color: var(--bg-light);
    border-radius: 12px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    /* --- NEW: Pop-in animation --- */
    transform: scale(0.95);
    transition: transform 0.2s ease;
}
#save-modal-backdrop:not(.hidden) .modal-dialog,
#load-modal-backdrop:not(.hidden) .modal-dialog {
    transform: scale(1);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 15px;
    background-color: var(--bg-medium);
    border-bottom: 1px solid var(--border-color);
    flex-shrink: 0;
}
.modal-header h3 {
    margin: 0;
    border: none;
    padding: 0;
    font-size: 1.1rem;
    color: var(--text-color);
    display: flex;
    align-items: center;
}
.modal-header h3 i {
    width: 20px;
    height: 20px;
    margin-right: 8px;
    color: var(--primary-color);
}
/* Specific header colors */
#load-modal .modal-header h3 i { color: var(--load-color); }

.modal-close {
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}
.modal-close:hover { background-color: var(--bg-dark); }
.modal-close i { width: 20px; height: 20px; color: var(--text-muted); }

.modal-content {
    flex-grow: 1;
    padding: 20px;
    font-size: 0.9rem;
    line-height: 1.5;
    color: var(--text-muted);
}
.modal-content p {
    margin-top: 0;
    margin-bottom: 15px;
}
.modal-content p:last-child {
    margin-bottom: 0;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    padding: 12px 15px;
    background-color: var(--bg-medium);
    border-top: 1px solid var(--border-color);
    flex-shrink: 0;
}

.modal-button {
    padding: 8px 16px;
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    transition: all 0.2s ease;
    margin-left: 8px;
}
.modal-button.confirm {
    background-color: var(--primary-color);
    color: white;
}
.modal-button.confirm:hover { background-color: var(--primary-hover); }
.modal-button.cancel {
    background-color: transparent;
    color: var(--text-muted);
    border: 1px solid var(--border-color);
}
.modal-button.cancel:hover { background-color: var(--bg-dark); }


/* --- 12. NEW: Specific Modal Content Styles --- */

/* --- Save Modal --- */
.save-form {
    display: flex;
    align-items: center;
    gap: 8px;
}
#save-circuit-name {
    flex-grow: 1;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 10px 12px;
    font-size: 0.9rem;
    font-family: inherit;
}
#save-circuit-name:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(0,123,255,0.25);
}
#ai-name-loading {
    display: flex;
    align-items: center;
    justify-content: center;
}
#ai-name-loading i {
    width: 20px;
    height: 20px;
    color: var(--text-muted);
    animation: spin 1s linear infinite;
}


/* --- Load Modal --- */
#load-circuit-list {
    max-height: 40vh;
    overflow-y: auto;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background-color: var(--bg-medium);
}
.load-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 15px;
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
    transition: background-color 0.15s ease;
}
.load-item:last-child {
    border-bottom: none;
}
.load-item:hover {
    background-color: var(--bg-dark);
}
.load-item-name {
    font-weight: 600;
    color: var(--text-color);
    font-size: 0.95rem;
}
.load-item-date {
    font-size: 0.8rem;
    color: var(--text-muted);
}
.load-item-delete {
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0.5;
    transition: all 0.2s ease;
}
.load-item-delete i {
    width: 16px;
    height: 16px;
    color: var(--delete-color);
}
.load-item:hover .load-item-delete {
    opacity: 1;
}
.load-item-delete:hover {
    background-color: #ffebee;
}