/* --- THEME VARIABLES --- */
:root {
    --bg-color: #202124;
    --toolbar-bg: #292a2d;
    --tab-bg: #202124;
    --tab-active: #3c4043;
    --tab-border: #3c4043;
    --text-color: #e8eaed;
    --text-muted: #9aa0a6;
    --border-color: #3c4043;
    --input-bg: #202124;
    --btn-bg: #3c4043;
    --btn-hover: #5f6368;
    --accent: #8ab4f8;
    --scroll-track: #202124;
    --scroll-thumb: #5f6368;
    --dropdown-bg: #292a2d;
    --dropdown-hover: #3c4043;
    --gutter-bg: #202124;
    --folder-color: #6e7681;
    --active-line-bg: #323639;
    --match-highlight: #44475a;
    --modal-bg: #292a2d;
    --modal-overlay: rgba(0, 0, 0, 0.7);
    --kbd-bg: #3c4043;
    --kbd-border: #5f6368;
}

body.light-mode {
    --bg-color: #ffffff;
    --toolbar-bg: #f1f3f4;
    --tab-bg: #e8eaed;
    --tab-active: #ffffff;
    --tab-border: #dadce0;
    --text-color: #202124;
    --text-muted: #5f6368;
    --border-color: #dadce0;
    --input-bg: #ffffff;
    --btn-bg: #ffffff;
    --btn-hover: #e8eaed;
    --accent: #1a73e8;
    --scroll-track: #ffffff;
    --scroll-thumb: #dadce0;
    --dropdown-bg: #ffffff;
    --dropdown-hover: #f1f3f4;
    --gutter-bg: #f7f7f7;
    --folder-color: #999;
    --active-line-bg: #e8f0fe;
    --match-highlight: #d2e3fc;
    --modal-bg: #ffffff;
    --modal-overlay: rgba(0, 0, 0, 0.5);
    --kbd-bg: #f1f3f4;
    --kbd-border: #ccc;
}

/* --- GLOBAL --- */
body { margin: 0; display: flex; flex-direction: column; height: 100vh; font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif; background-color: var(--bg-color); color: var(--text-color); overflow: hidden; transition: background-color 0.3s; }

/* --- SCROLLBARS --- */
::-webkit-scrollbar { width: 12px; height: 12px; }
::-webkit-scrollbar-track { background: var(--scroll-track); }
::-webkit-scrollbar-thumb { background: var(--scroll-thumb); border-radius: 6px; border: 3px solid var(--scroll-track); }
::-webkit-scrollbar-thumb:hover { background: var(--accent); }
::-webkit-scrollbar-corner { background: var(--scroll-track); }

/* --- CODEMIRROR --- */
.CodeMirror { 
    flex-grow: 1; 
    height: 100% !important; 
    font-family: 'Courier New', monospace; 
    font-size: 14px; 
    line-height: 1.6; 
}
.CodeMirror-gutters { background-color: var(--gutter-bg) !important; border-right: 1px solid var(--border-color) !important; }
.CodeMirror-linenumber { color: var(--text-muted) !important; }
.CodeMirror-foldgutter { color: var(--folder-color); }
.CodeMirror-foldmarker { color: var(--accent); text-shadow: none; font-family: arial; line-height: .3; cursor: pointer; }
.CodeMirror-foldgutter-open, .CodeMirror-foldgutter-folded { cursor: pointer; }
.CodeMirror-activeline-background { background: var(--active-line-bg) !important; }
.cm-matchhighlight { background-color: var(--match-highlight); }
.CodeMirror-hints { background: var(--dropdown-bg) !important; border: 1px solid var(--border-color) !important; color: var(--text-color) !important; border-radius: 4px; box-shadow: 0 4px 10px rgba(0,0,0,0.5); }
.CodeMirror-hint { color: var(--text-color) !important; padding: 2px 6px !important; border-radius: 2px; }
.CodeMirror-hint-active { background: var(--accent) !important; color: var(--bg-color) !important; }

/* --- PREVIEW PANE --- */
.preview-pane {
    display: none;
    flex-grow: 1;
    height: 100%;
    background-color: var(--bg-color);
    color: var(--text-color);
    padding: 20px;
    overflow-y: auto;
    font-family: 'Segoe UI', sans-serif;
    border-left: 1px solid var(--border-color);
}
.preview-pane h1, .preview-pane h2, .preview-pane h3 { border-bottom: 1px solid var(--border-color); padding-bottom: 5px; }
.preview-pane code { background-color: var(--tab-active); padding: 2px 4px; border-radius: 3px; font-family: 'Courier New', monospace; }
.preview-pane pre { background-color: var(--tab-active); padding: 10px; border-radius: 5px; overflow-x: auto; }
.preview-pane blockquote { border-left: 4px solid var(--accent); padding-left: 10px; color: var(--text-muted); }
.preview-pane.active { display: block; }

/* --- TOOLBAR --- */
.toolbar { 
    background-color: var(--toolbar-bg); 
    height: 50px; 
    min-height: 50px; 
    flex-shrink: 0;
    padding: 0 10px; 
    display: flex; 
    align-items: center; 
    gap: 6px; /* Reduced gap between groups */
    border-bottom: 1px solid var(--border-color); 
    white-space: nowrap; 
    position: relative; 
    overflow: visible; 
    z-index: 1000; 
}

.brand-section { display: flex; align-items: center; margin-right: 5px; cursor: pointer; user-select: none; }
.brand-section img { width: 24px; height: 24px; margin-right: 8px; }
.app-name { font-weight: bold; color: var(--accent); font-size: 1.1rem; transition: color 0.2s; }
.brand-section:hover .app-name { color: var(--text-color); }

/* Compact spacing for groups */
.group-file, .group-clipboard, .group-zoom, .group-search { 
    display: flex; 
    gap: 6px; 
    align-items: center; 
}

/* Desktop Adjustment: Show Logo, Hide Text */
@media (min-width: 769px) {
    .brand-section { display: flex; }
    .app-name { display: none; }
}

/* --- TAB BAR --- */
.tab-bar-container { 
    display: flex; 
    background-color: var(--bg-color); 
    border-bottom: 1px solid var(--border-color); 
    padding-top: 5px; 
    padding-left: 5px; 
    height: 35px; 
    min-height: 35px;
    flex-shrink: 0;
    box-sizing: border-box; 
    position: relative; 
    z-index: 500; 
}
.tab-bar { display: flex; overflow-x: auto; flex-grow: 1; scrollbar-width: none; }
.tab-bar::-webkit-scrollbar { display: none; }
.tab { display: flex; align-items: center; background-color: var(--tab-bg); color: var(--text-muted); padding: 0 10px; margin-right: 2px; border-top-left-radius: 6px; border-top-right-radius: 6px; border: 1px solid transparent; cursor: pointer; font-size: 0.85rem; max-width: 150px; min-width: 80px; user-select: none; }
.tab.active { background-color: var(--tab-active); color: var(--text-color); border-left: 1px solid var(--border-color); border-right: 1px solid var(--border-color); border-top: 2px solid var(--accent); font-weight: bold; }
.tab-name { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; margin-right: 4px; flex-shrink: 1; }
.tab-dirty { color: var(--accent); font-weight: bold; margin-right: 6px; font-size: 1.2rem; line-height: 1; flex-shrink: 0; }
.tab-close { width: 16px; height: 16px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 0.7rem; opacity: 0.6; flex-shrink: 0; }
.tab-close:hover { background-color: rgba(255, 0, 0, 0.2); color: #ff5f5f; opacity: 1; }
.tab-plus { background: transparent; border: none; color: var(--text-muted); font-size: 1.2rem; cursor: pointer; padding: 0 10px; }
.tab-plus:hover { color: var(--accent); background: transparent; }

/* --- BUTTONS & INPUTS --- */
button { 
    background: var(--btn-bg); 
    color: var(--text-color); 
    border: 1px solid var(--border-color); 
    padding: 4px 8px; /* Reduced padding for compactness */
    border-radius: 4px; 
    cursor: pointer; 
    font-size: 0.85rem; 
    white-space: nowrap; 
    flex-shrink: 0; 
    transition: background 0.2s; 
}
button:hover { background: var(--btn-hover); }
button.active { background: var(--accent); color: var(--bg-color); border-color: var(--accent); font-weight: bold; }
#btnPreview { display: none; }

.lang-select { background: var(--btn-bg); color: var(--text-color); border: 1px solid var(--border-color); padding: 4px 8px; border-radius: 4px; font-size: 0.85rem; cursor: pointer; }
.group-search input { background: var(--input-bg); border: 1px solid var(--border-color); color: var(--text-color); padding: 4px 8px; border-radius: 4px; width: 90px; font-size: 0.85rem; }
.separator { color: var(--text-muted); font-size: 1.2rem; margin: 0 2px; }

/* --- SPLIT BUTTON WRAPPERS --- */
.paste-wrapper, .save-wrapper { position: relative; display: flex; align-items: center; gap: 0 !important; }
.paste-wrapper button, .save-wrapper button { margin: 0 !important; }
#btnPaste, #btnSave { border-top-right-radius: 0; border-bottom-right-radius: 0; border-right: 0; }
#btnHistory, #btnSaveMenu { border-top-left-radius: 0; border-bottom-left-radius: 0; border-left: 1px solid var(--border-color); padding-left: 5px; padding-right: 5px; }

/* --- MENUS --- */
.history-menu { display: none; position: absolute; top: 100%; left: 0; background: var(--dropdown-bg); border: 1px solid var(--border-color); border-radius: 4px; box-shadow: 0 4px 10px rgba(0,0,0,0.5); min-width: 180px; max-width: 300px; z-index: 2000; flex-direction: column; margin-top: 4px; }
.history-menu.show { display: flex; }
.history-item { padding: 8px 12px; cursor: pointer; border-bottom: 1px solid var(--border-color); font-size: 0.85rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: var(--text-color); }
.history-item:hover { background: var(--dropdown-hover); }
.history-title { padding: 5px 12px; font-size: 0.7rem; color: var(--text-muted); font-weight: bold; text-transform: uppercase; background: var(--btn-bg); }

/* --- STATUS & OVERLAY --- */
.status-bar { background: var(--toolbar-bg); border-top: 1px solid var(--border-color); font-size: 0.8rem; padding: 4px 15px; color: var(--text-muted); display: flex; align-items: center; flex-shrink: 0; }
.drop-overlay { display: none; position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(32, 33, 36, 0.95); z-index: 3000; justify-content: center; align-items: center; border: 5px dashed var(--text-muted); box-sizing: border-box; pointer-events: none; }
.drop-overlay.active { display: flex; border-color: var(--accent); animation: pulse 1.5s infinite; }
.drop-message { font-size: 2rem; font-weight: bold; color: var(--accent); }
@keyframes pulse { 0% { border-color: var(--accent); } 50% { border-color: rgba(138, 180, 248, 0.4); } 100% { border-color: var(--accent); } }

/* --- MODAL --- */
.modal-overlay { display: none; position: fixed; top: 0; left: 0; width: 100%; height: 100%; background-color: var(--modal-overlay); z-index: 4000; align-items: center; justify-content: center; }
.modal-overlay.show { display: flex; }
.modal-content { background-color: var(--modal-bg); border: 1px solid var(--border-color); border-radius: 8px; width: 90%; max-width: 400px; box-shadow: 0 10px 25px rgba(0,0,0,0.5); overflow: hidden; }
.modal-header { display: flex; justify-content: space-between; align-items: center; padding: 10px 15px; border-bottom: 1px solid var(--border-color); background-color: var(--toolbar-bg); }
.modal-header h3 { margin: 0; font-size: 1.1rem; color: var(--text-color); }
.modal-close-btn { font-size: 1.5rem; cursor: pointer; color: var(--text-muted); line-height: 1; }
.modal-close-btn:hover { color: var(--accent); }
.modal-body { padding: 15px; }
.shortcut-table { width: 100%; border-collapse: collapse; }
.shortcut-table td { padding: 6px 0; font-size: 0.9rem; color: var(--text-color); border-bottom: 1px solid var(--border-color); }
.shortcut-table tr:last-child td { border-bottom: none; }
kbd { background-color: var(--kbd-bg); border: 1px solid var(--kbd-border); border-radius: 3px; padding: 2px 5px; font-family: monospace; font-size: 0.8rem; box-shadow: 0 1px 1px rgba(0,0,0,0.2); color: var(--text-color); }

/* --- MOBILE RESPONSIVENESS --- */
@media (max-width: 768px) {
    .toolbar { display: block; height: 50px; overflow: hidden; padding: 0; transition: height 0.3s ease; }
    .brand-section { display: flex; height: 50px; width: 100%; padding: 0 15px; box-sizing: border-box; justify-content: space-between; background-color: var(--toolbar-bg); cursor: pointer; border-bottom: 1px solid transparent; }
    .brand-section::after { content: '☰'; color: var(--text-color); font-size: 1.5rem; }
    
    .app-name { display: block; } /* Show name on mobile menu header */

    .group-file, .group-clipboard, .lang-select, .group-zoom, .group-search, .paste-wrapper, .save-wrapper { display: none; width: 100%; padding: 10px 15px; box-sizing: border-box; border-top: 1px solid var(--border-color); background: var(--bg-color); justify-content: center; }
    .toolbar.mobile-open { height: auto; overflow: visible; position: absolute; width: 100%; box-shadow: 0 4px 10px rgba(0,0,0,0.5); }
    .toolbar.mobile-open .brand-section { border-bottom: 1px solid var(--border-color); }
    .toolbar.mobile-open .brand-section::after { content: '✕'; }
    
    .toolbar.mobile-open .group-file, 
    .toolbar.mobile-open .group-clipboard, 
    .toolbar.mobile-open .lang-select, 
    .toolbar.mobile-open .group-zoom, 
    .toolbar.mobile-open .group-search, 
    .toolbar.mobile-open .paste-wrapper,
    .toolbar.mobile-open .save-wrapper { display: flex; }
    
    .group-file, .group-clipboard { gap: 8px; flex-wrap: wrap; }
    
    .group-file button, .group-clipboard button { 
        flex-grow: 1; 
        padding: 8px 10px; 
        font-size: 0.85rem; 
    }
    
    .group-search input { flex-grow: 1; width: auto; padding: 8px; }
    .group-search button { padding: 8px 12px; }
    
    .paste-wrapper, .save-wrapper, #btnPaste, #btnSave { flex-grow: 1; }
    #btnHistory, #btnTools, #btnSaveMenu { width: auto; flex-grow: 0; }
}