:root {
    --bg-main: #101010;          
    --page-bg: #FFFFFF;          
    --accent-blue: #009CFF;      
    --glass-border: rgba(255, 255, 255, 0.15);
    --text-light: #F3F3F3;
    --text-dark: #101010;
    --dropdown-bg: #1a1a1a;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: 'Inter', sans-serif;
    background: var(--bg-main);
    color: var(--text-light);
    height: 100vh;
    overflow: hidden;
}

.app-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
}

/* Top Navigation Bar */
.top-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.6rem 1.2rem;
    background: #141414;
    border-bottom: 1px solid var(--glass-border);
    z-index: 100;
}

.file-controls, .utility-controls {
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.history-controls {
    display: flex;
    border-left: 1px solid var(--glass-border);
    padding-left: 0.4rem;
    margin-left: 0.2rem;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.8rem;
    border: none;
    background: transparent;
    color: var(--text-light);
    cursor: pointer;
    border-radius: 0.375rem;
    font-size: 0.9rem;
}

.nav-item:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--accent-blue);
}

#documentTitle {
    border: 1px solid transparent;
    font-size: 1rem;
    font-weight: 600;
    padding: 0.4rem 0.8rem;
    border-radius: 0.375rem;
    background: rgba(0, 0, 0, 0.3);
    color: var(--text-light);
    text-align: center;
    width: 200px;
}

#documentTitle:focus {
    outline: none;
    border-color: var(--accent-blue);
}

/* Dropdown Menu Layout */
.dropdown {
    position: relative;
}

.dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--dropdown-bg);
    border: 1px solid var(--glass-border);
    border-radius: 0.5rem;
    box-shadow: 0 10px 25px rgba(0,0,0,0.5);
    min-width: 200px;
    padding: 0.4rem 0;
    z-index: 1000;
}

.dropdown-menu button {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    width: 100%;
    padding: 0.7rem 1.2rem;
    border: none;
    background: none;
    color: #FFFFFF !important; 
    text-align: left;
    cursor: pointer;
    font-size: 0.9rem;
    white-space: nowrap;
}

.dropdown-menu button:hover {
    background: var(--accent-blue);
    color: white !important;
}

.dropdown:hover .dropdown-menu {
    display: block;
}

/* Ribbon & Toolbar Custom Styles */
.ribbon-container {
    background: #1a1a1a;
    border-bottom: 1px solid var(--glass-border);
    padding: 0.5rem 1rem;
    min-height: 42px;
}

.ql-toolbar.ql-snow {
    border: none !important;
    background: #1a1a1a !important;
}

.ql-snow .ql-stroke { stroke: #E0E0E0 !important; }
.ql-snow .ql-fill { fill: #E0E0E0 !important; }
.ql-snow .ql-picker { color: #FFFFFF !important; }

.ql-snow .ql-picker-options {
    background-color: #222222 !important;
    border: 1px solid var(--glass-border) !important;
}

.ql-snow .ql-picker-item {
    color: #FFFFFF !important;
}

/* Custom CSS Rules to display continuous clean Numbers and real Font names inside Quill picker UI */
.ql-snow .ql-picker.ql-size .ql-picker-label::before,
.ql-snow .ql-picker.ql-size .ql-picker-item::before {
    content: attr(data-value) !important;
}
.ql-snow .ql-picker.ql-font .ql-picker-label::before,
.ql-snow .ql-picker.ql-font .ql-picker-item::before {
    content: attr(data-value) !important;
}

/* Workspace containing true detached A4 Pages */
.workspace {
    flex: 1;
    display: flex;
    position: relative;
    overflow: hidden;
}

#editor-container {
    flex: 1;
    padding: 3rem 1rem;
    background: #111111;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem; /* Clear structural physical gap between page sheets */
}

/* STRUCTURAL DISCRETE A4 PAGES */
.page {
    background: var(--page-bg) !important;
    color: var(--text-dark) !important;
    box-shadow: 0 12px 35px rgba(0, 0, 0, 0.5);
    padding: 2.5cm 2cm;
    width: 21cm;
    height: 29.7cm;     /* Exact physical A4 ceiling */
    min-height: 29.7cm;
    max-height: 29.7cm;
    border-radius: 2px;
    position: relative;
    box-sizing: border-box;
    page-break-after: always; /* Correct behavior hook for PDF rendering Engines */
}

/* Quill structural container overrides */
.ql-container.ql-snow {
    border: none !important;
    font-size: 14px;
    height: 100%;
}

.ql-editor {
    height: 100%;
    padding: 0 !important;
    color: var(--text-dark) !important;
    overflow: hidden; /* No inner scrollbars allowed anymore */
}

/* Focus Mode */
.focus-mode .top-bar, .focus-mode .ribbon-container, .focus-mode .status-bar {
    display: none !important;
}

/* Images */
.page img {
    max-width: 100%;
    height: auto;
    cursor: pointer;
    border-radius: 4px;
}
.page img.selected-target {
    outline: 3px solid var(--accent-blue);
}

.image-floating-tools {
    display: none;
    position: absolute;
    background: #222;
    border: 1px solid var(--glass-border);
    padding: 0.4rem;
    border-radius: 0.5rem;
    box-shadow: 0 8px 20px rgba(0,0,0,0.4);
    gap: 0.3rem;
    z-index: 2000;
}
.image-floating-tools button {
    background: transparent;
    border: none;
    color: white;
    padding: 0.3rem 0.6rem;
    font-size: 0.8rem;
    cursor: pointer;
}
.image-floating-tools button:hover { background: rgba(255,255,255,0.15); }
.image-floating-tools .danger:hover { background: #ff3b30; }
.image-floating-tools .separator { width: 1px; background: rgba(255,255,255,0.2); }

/* Sidebar Drawer */
.document-management {
    position: absolute;
    right: -300px;
    top: 0;
    bottom: 0;
    width: 300px;
    background: #161616;
    border-left: 1px solid var(--glass-border);
    padding: 1.5rem;
    transition: right 0.3s ease;
    z-index: 500;
}
.document-management.open { right: 0; }

.sidebar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

#closeSidebarBtn {
    background: transparent;
    border: none;
    color: #FFFFFF;
    cursor: pointer;
    font-size: 1.2rem;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}
#closeSidebarBtn:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #ff3b30;
}

#documentList li {
    padding: 0.6rem;
    border-bottom: 1px solid rgba(255,255,255,0.05);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* Status Bar Footer */
.status-bar {
    background: #141414;
    border-top: 1px solid var(--glass-border);
    padding: 0.4rem 1.5rem;
    display: flex;
    gap: 1.5rem;
    font-size: 0.8rem;
    color: #8A8A8A;
}

/* Responsive UI Engine Mobile */
@media (max-width: 768px) {
    .hide-mobile { display: none !important; }
    #documentTitle { width: 130px; }
    
    .app-container { flex-direction: column-reverse; }
    .top-bar { order: 3; }
    .ribbon-container { order: 2; padding: 0.3rem; overflow-x: auto; }
    .workspace { order: 1; height: calc(100vh - 120px); }
    .status-bar { display: none; }
    
    #editor-container { padding: 1rem 0.5rem; gap: 1rem; }
    .page { width: 100%; height: auto; max-height: none; min-height: 100%; padding: 1.5rem 1rem; border-radius: 0; }
    .document-management { width: 100%; right: -100%; }
}