:root {
    --bg-color-light: #f0f2f5;
    --panel-bg-light: rgba(255, 255, 255, 0.6);
    --border-color-light: rgba(255, 255, 255, 0.8);
    --text-color-light: #333;
    --shadow-light: 0 4px 30px rgba(0, 0, 0, 0.1);
    --button-bg-light: rgba(255, 255, 255, 0.7);
    --button-hover-light: rgba(255, 255, 255, 0.9);
    --input-bg-light: rgba(255, 255, 255, 0.5);
    --input-border-light: rgba(255, 255, 255, 0.7);
    --ai-message-bg-light: rgba(240, 240, 240, 0.7);
    --user-message-bg-light: rgba(220, 235, 255, 0.7);
    --tab-inactive-light: rgba(255, 255, 255, 0.5);
    --accent: #007bff;
    --mood-playful: #2aa198;
    --mood-serious: #0056b3;
    --mood-neutral: #007bff;
}

body {
    font-family: 'Noto Sans', system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--bg-color-light), #e0e5ea);
    color: var(--text-color-light);
    transition: background-color 0.3s ease, color 0.3s ease;
    overflow: hidden; /* Prevent scrollbar for background */
}

body.dark-mode {
    background: linear-gradient(135deg, var(--bg-color-dark), #1a1c22);
    color: var(--text-color-dark);
}

.app-container {
    display: flex;
    flex-direction: column;
    width: 95vw;
    max-width: 1400px;
    height: 90vh;
    max-height: 900px;
    border-radius: 20px;
    overflow: hidden;
    position: relative;
    box-shadow: 0 10px 50px rgba(0, 0, 0, 0.2);
    opacity: 0;
    transform: translateY(12px);
    transition: opacity 500ms ease, transform 500ms ease;
}

#startupOverlay {
    position: fixed; inset: 0;
    background: linear-gradient(120deg, #0f1115, #141820, #0f1115);
    background-size: 200% 200%;
    animation: bgShift 8s ease-in-out infinite;
    display: grid; place-items: center; z-index: 2000;
}
#startupOverlay .startup-inner { text-align: center; color: #eef1f6; }
#startupOverlay .logo-glow {
    font-weight: 700; letter-spacing: 0.5px; font-size: 40px;
    text-shadow: 0 0 20px rgba(0,153,255,0.35);
    animation: pulse 2.4s ease-in-out infinite;
}
#startupOverlay .tagline { opacity: 0; animation: fadeIn 1s ease 0.8s forwards; }
#startupOverlay .boot-seq { margin-top: 10px; opacity: 0.8; }
#startupOverlay .dots { display: inline-block; overflow: hidden; width: 0; animation: typeDots 1.2s steps(3,end) infinite; }

/* Sign In Overlay */
#signInOverlay{position:fixed;inset:0;display:none;place-items:center;z-index:1500;background:rgba(0,0,0,0.25)}
#signInOverlay.active{display:grid;}
#signInOverlay .signin-inner{padding:24px;max-width:420px;width:90%;}
#signInOverlay .logo{font-weight:700;font-size:28px;margin-bottom:6px;}
#signInOverlay .signin-form{display:flex;gap:10px;margin-top:10px;}
#signInOverlay input{flex:1;padding:12px 14px;border:1px solid var(--input-border-light);border-radius:10px;background:var(--input-bg-light);color:inherit;}
.returning-hint{opacity:.8;margin-top:8px;}

/* Mood dot and memory panel */
#moodDot{display:inline-block;width:8px;height:8px;border-radius:50%;margin-left:8px;background:var(--accent);vertical-align:middle;box-shadow:0 0 0 2px rgba(0,0,0,0.05)}
.memory-panel{position:fixed;right:16px;bottom:16px;width:420px;max-width:92vw;max-height:60vh;padding:12px;display:none}
.memory-panel.active{display:block;animation:fadeIn .2s ease}
.memory-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:8px}
.memory-content{margin:0;background:transparent;border:none;padding:0;white-space:pre-wrap;word-break:break-word}

/* Mood classes adjust accent subtly */
body.mood-playful { --accent: var(--mood-playful); }
body.mood-serious { --accent: var(--mood-serious); }
body.mood-neutral { --accent: var(--mood-neutral); }

@keyframes pulse { 0%,100%{transform:scale(1)} 50%{transform:scale(1.03)} }
@keyframes bgShift { 0%{background-position:0% 50%} 50%{background-position:100% 50%} 100%{background-position:0% 50%} }
@keyframes fadeIn { from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none} }
@keyframes typeDots { 0%{width:0ch} 100%{width:3ch} }

.glass-panel {
    background: var(--panel-bg-light);
    border-radius: 15px;
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color-light);
    box-shadow: var(--shadow-light);
    transition: background 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

body.dark-mode .glass-panel {
    background: var(--panel-bg-dark);
    border-color: var(--border-color-dark);
    box-shadow: var(--shadow-dark);
}

.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 30px;
    margin-bottom: 15px;
    z-index: 10;
}

.app-header h1 {
    margin: 0;
    font-size: 1.8em;
    color: inherit;
}

.header-controls {
    display: flex;
    align-items: center;
    gap: 20px;
}

.personality-control {
    display: flex;
    align-items: center;
    gap: 10px;
}

.personality-control span {
    font-size: 0.9em;
}

#personalitySlider {
    width: 100px;
    -webkit-appearance: none;
    height: 6px;
    border-radius: 5px;
    background: rgba(0, 0, 0, 0.2);
    outline: none;
    opacity: 0.7;
    transition: opacity 0.2s;
}

#personalitySlider:hover {
    opacity: 1;
}

#personalitySlider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: #007bff;
    cursor: pointer;
    box-shadow: 0 0 2px rgba(0, 0, 0, 0.3);
}

#personalitySlider::-moz-range-thumb {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: #007bff;
    cursor: pointer;
    box-shadow: 0 0 2px rgba(0, 0, 0, 0.3);
}

.icon-button {
    background: var(--button-bg-light);
    border: none;
    border-radius: 10px;
    padding: 8px 12px;
    cursor: pointer;
    font-size: 1.2em;
    transition: background 0.3s ease, transform 0.2s ease;
}

body.dark-mode .icon-button {
    background: var(--button-bg-dark);
}

.icon-button:hover {
    background: var(--button-hover-light);
    transform: translateY(-2px);
}

body.dark-mode .icon-button:hover {
    background: var(--button-hover-dark);
}

.main-content {
    flex: 1;
    display: flex;
    gap: 15px;
    padding: 0 15px 15px 15px;
    overflow: hidden;
}

.chat-panel {
    flex: 2;
    display: flex;
    flex-direction: column;
    padding: 20px;
    min-width: 300px;
}

.chat-history {
    flex: 1;
    overflow-y: auto;
    padding-right: 10px;
    margin-bottom: 15px;
    scrollbar-width: thin;
    scrollbar-color: rgba(0,0,0,0.2) transparent;
}

.chat-history::-webkit-scrollbar {
    width: 8px;
}
.chat-history::-webkit-scrollbar-track {
    background: transparent;
}
.chat-history::-webkit-scrollbar-thumb {
    background-color: rgba(0,0,0,0.2);
    border-radius: 10px;
    border: 2px solid transparent;
}
body.dark-mode .chat-history::-webkit-scrollbar-thumb {
    background-color: rgba(255,255,255,0.2);
}

.message {
    padding: 10px 15px;
    border-radius: 15px;
    margin-bottom: 10px;
    max-width: 85%;
    word-wrap: break-word;
    line-height: 1.5;
    transition: background 0.3s ease;
}

.ai-message {
    background: var(--ai-message-bg-light);
    align-self: flex-start;
    border-bottom-left-radius: 5px;
}

body.dark-mode .ai-message {
    background: var(--ai-message-bg-dark);
}

.user-message {
    background: var(--user-message-bg-light);
    align-self: flex-end;
    margin-left: auto;
    border-bottom-right-radius: 5px;
}

body.dark-mode .user-message {
    background: var(--user-message-bg-dark);
}

.chat-input-area {
    display: flex;
    gap: 10px;
}

textarea#chatInput {
    flex: 1;
    padding: 12px 15px;
    border: 1px solid var(--input-border-light);
    border-radius: 10px;
    background: var(--input-bg-light);
    font-family: inherit;
    font-size: 1em;
    color: inherit;
    resize: none;
    overflow-y: hidden; /* Hide scrollbar initially */
    transition: background 0.3s ease, border-color 0.3s ease;
}

body.dark-mode textarea#chatInput {
    border-color: var(--input-border-dark);
    background: var(--input-bg-dark);
}

textarea#chatInput:focus {
    outline: none;
    border-color: #007bff;
    box-shadow: 0 0 0 2px rgba(0, 123, 255, 0.2);
}

.send-button {
    background-color: var(--accent);
    color: white;
    border: none;
    border-radius: 10px;
    padding: 12px 20px;
    cursor: pointer;
    font-size: 1em;
    transition: background-color 0.3s ease, transform 0.2s ease;
}

.send-button:hover {
    background-color: #0056b3;
    transform: translateY(-2px);
}

.tool-hub {
    flex: 3;
    display: flex;
    flex-direction: column;
    padding: 20px;
    min-width: 400px;
}

.tool-tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    flex-wrap: wrap; /* Allow tabs to wrap */
}

.tab-button {
    background: var(--tab-inactive-light);
    border: none;
    border-radius: 10px;
    padding: 10px 18px;
    cursor: pointer;
    font-size: 1em;
    color: inherit;
    transition: background 0.3s ease, transform 0.2s ease;
}

body.dark-mode .tab-button {
    background: var(--tab-inactive-dark);
}

.tab-button:hover {
    background: var(--button-hover-light);
    transform: translateY(-2px);
}

body.dark-mode .tab-button:hover {
    background: var(--button-hover-dark);
}

.tab-button.active {
    background-color: var(--accent);
    color: #fff;
    box-shadow: 0 4px 10px color-mix(in srgb, var(--accent) 30%, transparent);
}

.tool-content {
    flex: 1;
    overflow-y: auto;
    padding-right: 10px;
    scrollbar-width: thin;
    scrollbar-color: rgba(0,0,0,0.2) transparent;
}

.tool-content::-webkit-scrollbar {
    width: 8px;
}
.tool-content::-webkit-scrollbar-track {
    background: transparent;
}
.tool-content::-webkit-scrollbar-thumb {
    background-color: rgba(0,0,0,0.2);
    border-radius: 10px;
    border: 2px solid transparent;
}
body.dark-mode .tool-content::-webkit-scrollbar-thumb {
    background-color: rgba(255,255,255,0.2);
}

.tab-pane {
    display: none;
    height: 100%;
    flex-direction: column;
}

.tab-pane.active {
    display: flex;
}

.tab-pane h3 {
    margin-top: 0;
    margin-bottom: 20px;
    color: inherit;
    font-size: 1.5em;
}

/* Code Lab */
.code-editor-container {
    display: flex;
    flex: 1;
    gap: 15px;
    min-height: 0; /* Allow flex item to shrink */
}

#codeEditor {
    flex: 1;
    min-height: 200px; /* Ensures a minimum height */
    height: auto; /* Adjust based on content */
    padding: 15px;
    border: 1px solid var(--input-border-light);
    border-radius: 10px;
    background: var(--input-bg-light);
    font-family: 'Fira Code', 'Cascadia Code', 'Consolas', monospace;
    font-size: 0.9em;
    color: inherit;
    resize: vertical;
    overflow: auto;
    transition: background 0.3s ease, border-color 0.3s ease;
}

body.dark-mode #codeEditor {
    border-color: var(--input-border-dark);
    background: var(--input-bg-dark);
}

#codeEditor:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent) 20%, transparent);
}

.code-preview {
    flex: 1;
    border: 1px solid var(--input-border-light);
    border-radius: 10px;
    background: white; /* Always white for preview content */
    min-height: 200px; /* Ensures a minimum height */
}

body.dark-mode .code-preview {
    border-color: var(--input-border-dark);
}

/* Image Maker */
.image-maker-controls {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    align-items: flex-end;
}

#imagePrompt {
    flex: 1;
    padding: 12px 15px;
    border: 1px solid var(--input-border-light);
    border-radius: 10px;
    background: var(--input-bg-light);
    font-family: inherit;
    font-size: 1em;
    color: inherit;
    resize: vertical;
    transition: background 0.3s ease, border-color 0.3s ease;
}

body.dark-mode #imagePrompt {
    border-color: var(--input-border-dark);
    background: var(--input-bg-dark);
}

#imagePrompt:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent) 20%, transparent);
}

#generateImageBtn {
    background-color: #28a745;
    color: white;
    border: none;
    border-radius: 10px;
    padding: 12px 20px;
    cursor: pointer;
    font-size: 1em;
    transition: background-color 0.3s ease, transform 0.2s ease;
}

#generateImageBtn:hover {
    background-color: #218838;
    transform: translateY(-2px);
}

.image-display {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 200px;
    border: 1px dashed var(--input-border-light);
    border-radius: 10px;
    background: var(--input-bg-light);
    overflow: hidden;
    position: relative;
    transition: background 0.3s ease, border-color 0.3s ease;
}

body.dark-mode .image-display {
    border-color: var(--input-border-dark);
    background: var(--input-bg-dark);
}

.image-display img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    border-radius: 8px;
}

/* Text Tools */
#textInput, #textOutput {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--input-border-light);
    border-radius: 10px;
    background: var(--input-bg-light);
    font-family: inherit;
    font-size: 1em;
    color: inherit;
    resize: vertical;
    margin-bottom: 15px;
    transition: background 0.3s ease, border-color 0.3s ease;
}

body.dark-mode #textInput, body.dark-mode #textOutput {
    border-color: var(--input-border-dark);
    background: var(--input-bg-dark);
}

#textInput:focus, #textOutput:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent) 20%, transparent);
}

.text-tool-buttons {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.text-tool-buttons button {
    background-color: #6c757d;
    color: white;
    border: none;
    border-radius: 10px;
    padding: 10px 18px;
    cursor: pointer;
    font-size: 1em;
    transition: background-color 0.3s ease, transform 0.2s ease;
}

.text-tool-buttons button:hover {
    background-color: #5a6268;
    transform: translateY(-2px);
}

/* Data View */
#dataFile {
    margin-bottom: 20px;
    padding: 10px;
    border: 1px solid var(--input-border-light);
    border-radius: 10px;
    background: var(--input-bg-light);
    transition: background 0.3s ease, border-color 0.3s ease;
}

body.dark-mode #dataFile {
    border-color: var(--input-border-dark);
    background: var(--input-bg-dark);
}

#dataDisplay {
    background: var(--input-bg-light);
    border: 1px solid var(--input-border-light);
    border-radius: 10px;
    padding: 15px;
    min-height: 150px;
    overflow: auto;
    font-family: 'Fira Code', 'Cascadia Code', 'Consolas', monospace;
    font-size: 0.9em;
    color: inherit;
    transition: background 0.3s ease, border-color 0.3s ease;
}

body.dark-mode #dataDisplay {
    border-color: var(--input-border-dark);
    background: var(--input-bg-dark);
}

/* Command Bar */
.command-bar {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80%;
    max-width: 600px;
    background: var(--panel-bg-light);
    border-radius: 15px;
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color-light);
    box-shadow: var(--shadow-light);
    padding: 15px;
    z-index: 1000;
    display: none; /* Hidden by default */
    opacity: 0;
    transition: opacity 0.2s ease, transform 0.2s ease;
}

body.dark-mode .command-bar {
    background: var(--panel-bg-dark);
    border-color: var(--border-color-dark);
    box-shadow: var(--shadow-dark);
}

.command-bar.active {
    display: block; /* Use block to enable transition */
    opacity: 1;
    transform: translate(-50%, -50%) scale(1);
}

#commandInput {
    width: 100%;
    padding: 15px 20px;
    border: none;
    border-radius: 10px;
    background: var(--input-bg-light);
    font-family: inherit;
    font-size: 1.1em;
    color: inherit;
    outline: none;
    transition: background 0.3s ease, color 0.3s ease;
}

body.dark-mode #commandInput {
    background: var(--input-bg-dark);
}

.loading-indicator { display: inline-flex; gap: 8px; align-items: center; }
.loading-indicator .spinner {
    width: 16px; height: 16px; border-radius: 50%;
    border: 2px solid rgba(0,0,0,0.15); border-top-color: var(--accent);
    animation: spin 0.9s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Responsive adjustments */
@media (max-width: 1024px) {
    .main-content {
        flex-direction: column;
        overflow-y: auto;
    }

    .chat-panel, .tool-hub {
        min-width: unset;
        width: 100%;
        height: auto;
        max-height: 50vh; /* Limit height to prevent excessive scrolling */
    }

    .chat-panel {
        margin-bottom: 15px;
    }

    .code-editor-container {
        flex-direction: column;
    }

    .code-preview {
        width: 100%;
        height: 250px; /* Fixed height for mobile preview */
    }

    #codeEditor {
        width: 100%;
        height: 250px; /* Fixed height for mobile editor */
    }
}

@media (max-width: 768px) {
    .app-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
        padding: 10px 20px;
    }

    .header-controls {
        width: 100%;
        justify-content: space-between;
    }

    .app-container {
        width: 98vw;
        height: 98vh;
        border-radius: 10px;
    }

    .glass-panel {
        border-radius: 10px;
    }

    .chat-input-area {
        flex-direction: column;
        gap: 5px;
    }

    .send-button {
        width: 100%;
    }

    .tool-tabs {
        justify-content: center;
    }
}