/* ========================================
   Component Styles
   ======================================== */

/* Calculator */
.calculator {
    max-width: 360px;
    margin: 0 auto;
}

.calc-display {
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    margin-bottom: var(--space-lg);
    text-align: right;
}

.calc-history {
    font-size: 0.875rem;
    color: var(--text-muted);
    min-height: 1.5em;
    margin-bottom: var(--space-sm);
}

.calc-input {
    font-size: 2.5rem;
    font-weight: 300;
    word-break: break-all;
    line-height: 1.2;
}

.calc-buttons {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-sm);
}

.calc-btn {
    height: 64px;
    border: none;
    border-radius: var(--radius-md);
    font-size: 1.25rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
    background: var(--bg-glass);
    color: var(--text-primary);
    border: 1px solid var(--border-glass);
}

.calc-btn:hover {
    background: var(--bg-glass-hover);
    transform: scale(1.05);
}

.calc-btn:active {
    transform: scale(0.95);
}

.calc-btn.operator {
    background: rgba(0, 122, 255, 0.2);
    color: var(--accent);
}

.calc-btn.operator:hover {
    background: rgba(0, 122, 255, 0.3);
}

.calc-btn.func {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-secondary);
}

.calc-btn.equals {
    background: var(--accent);
    color: white;
}

.calc-btn.equals:hover {
    background: var(--accent-hover);
    box-shadow: var(--shadow-glow);
}

.calc-btn.zero {
    grid-column: span 2;
}

.panel-mode-toggle {
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-full);
    color: var(--text-secondary);
    font-size: 0.875rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.panel-mode-toggle:hover {
    background: var(--bg-glass-hover);
    color: var(--text-primary);
}

/* Notepad */
.notepad-container {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: var(--space-lg);
    min-height: 500px;
}

.notes-sidebar {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.notes-search {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
}

.notes-search i,
.notes-search svg {
    width: 18px;
    height: 18px;
    color: var(--text-muted);
}

.notes-search input {
    flex: 1;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 0.875rem;
}

.notes-search input:focus {
    outline: none;
}

.tags-filter {
    display: flex;
    flex-wrap: wrap;
    align-content: flex-start;
    /* Ensure multi-line stack properly */
    gap: 8px;
    /* Slightly larger gap */
    margin-top: 12px;
    /* FIX OVERLAP */
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-sm);
    border-bottom: 1px solid var(--border-glass);
}

.tag-btn {
    padding: var(--space-xs) var(--space-sm);
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-full);
    color: var(--text-secondary);
    font-size: 0.7rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.tag-btn:hover,
.tag-btn.active {
    background: var(--bg-glass-hover);
    color: var(--text-primary);
}

.tag-btn {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.delete-tag-btn {
    display: none;
    margin-left: 4px;
    font-size: 0.9em;
    font-weight: bold;
    color: inherit;
    opacity: 0.6;
    cursor: pointer;
    border-radius: 50%;
    width: 14px;
    height: 14px;
    text-align: center;
    line-height: 14px;
}

.tag-btn:hover .delete-tag-btn {
    display: inline-block;
}

.delete-tag-btn:hover {
    opacity: 1;
    background: rgba(255, 0, 0, 0.3);
}

/* Accordion Folders */
.folders-accordion-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
    flex: 1;
    overflow-y: auto;
}

.folder-accordion {
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.folder-header {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-glass);
    cursor: pointer;
    transition: all var(--transition-fast);
    user-select: none;
}

.folder-header:hover {
    background: var(--bg-glass-hover);
}

.folder-header.expanded {
    background: var(--bg-glass-hover);
    border-bottom: none;
}

.folder-actions {
    display: flex;
    align-items: center;
    gap: 2px;
    margin-left: auto;
}

.folder-add-note-btn,
.folder-delete-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 4px;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.folder-add-note-btn:hover {
    color: var(--accent);
    background: rgba(0, 122, 255, 0.15);
}

.folder-delete-btn:hover {
    color: #ff6b6b;
    background: rgba(255, 107, 107, 0.15);
}

.folder-add-note-btn i,
.folder-add-note-btn svg,
.folder-delete-btn i,
.folder-delete-btn svg {
    width: 14px;
    height: 14px;
}

.folder-header.drag-over {
    background: rgba(0, 122, 255, 0.25);
    border-color: var(--accent);
    box-shadow: inset 0 0 10px rgba(0, 122, 255, 0.3);
}

.folder-chevron {
    width: 14px;
    height: 14px;
    color: var(--text-muted);
    flex-shrink: 0;
}

.folder-icon {
    width: 16px;
    height: 16px;
    color: var(--accent);
    flex-shrink: 0;
}

.folder-name {
    flex: 1;
    font-size: 0.875rem;
    font-weight: 500;
}

.folder-count {
    font-size: 0.7rem;
    color: var(--text-muted);
    background: var(--bg-glass);
    padding: 2px 6px;
    border-radius: var(--radius-full);
}

.folder-content {
    display: grid;
    grid-template-rows: 0fr;
    transition: grid-template-rows 0.3s cubic-bezier(0.4, 0, 0.2, 1),
        background-color 0.3s ease;
    background: transparent;
}

.folder-content.expanded {
    grid-template-rows: 1fr;
    background: rgba(0, 0, 0, 0.1);
}

.folder-content-inner {
    overflow: hidden;
    min-height: 0;
    padding: 0 var(--space-xs);
    opacity: 0;
    transition: padding 0.3s ease, opacity 0.3s ease;
}

.folder-content.expanded .folder-content-inner {
    padding: var(--space-xs);
    opacity: 1;
}

.folder-content .note-item {
    margin: 0;
    margin-bottom: var(--space-xs);
    border-radius: var(--radius-sm);
}

.folder-content .note-item:last-child {
    margin-bottom: 0;
}

.folder-content .empty-hint {
    padding: var(--space-md);
    text-align: center;
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* Chevron rotation animation */
.folder-chevron {
    transition: transform 0.2s ease-out;
}

.folder-header.expanded .folder-chevron {
    transform: rotate(0deg);
}

.notes-list {
    flex: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.note-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md);
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.note-item-content {
    flex: 1;
    min-width: 0;
}

.note-item:hover,
.note-item.active {
    background: var(--bg-glass-hover);
    border-color: var(--border-glass-hover);
}

.note-delete-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 6px;
    border-radius: var(--radius-sm);
    opacity: 0;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.note-item:hover .note-delete-btn {
    opacity: 1;
}

.note-delete-btn:hover {
    color: #ff6b6b;
    background: rgba(255, 107, 107, 0.15);
}

.note-delete-btn i,
.note-delete-btn svg {
    width: 14px;
    height: 14px;
}

.note-item-title {
    font-weight: 500;
    margin-bottom: var(--space-xs);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.note-item-preview {
    font-size: 0.875rem;
    color: var(--text-secondary);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.note-editor {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.note-editor-header {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.note-title {
    background: none;
    border: none;
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    padding: 0;
}

.note-title:focus {
    outline: none;
}

.note-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
    align-items: center;
}

.note-tag {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    color: white;
}

.note-tag button {
    background: none;
    border: none;
    color: inherit;
    cursor: pointer;
    padding: 0;
    opacity: 0.7;
}

.note-tag button:hover {
    opacity: 1;
}

.add-tag-btn {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-xs) var(--space-sm);
    background: var(--bg-glass);
    border: 1px dashed var(--border-glass);
    border-radius: var(--radius-full);
    color: var(--text-muted);
    font-size: 0.75rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.add-tag-btn:hover {
    background: var(--bg-glass-hover);
    color: var(--text-primary);
    border-style: solid;
}

.add-tag-btn i,
.add-tag-btn svg {
    width: 12px;
    height: 12px;
}

/* Rich Text Editor */
.note-content-editor {
    flex: 1;
    min-height: 350px;
    max-height: 500px;
    padding: var(--space-lg);
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 1rem;
    line-height: 1.7;
    overflow-y: auto;
}

.note-content-editor:focus {
    outline: none;
    border-color: var(--accent);
}

.note-content-editor:empty::before {
    content: attr(placeholder);
    color: var(--text-muted);
    pointer-events: none;
}

.note-content-editor h1 {
    font-size: 2rem;
    font-weight: 700;
    margin: 0.5em 0;
}

.note-content-editor h2 {
    font-size: 1.5rem;
    font-weight: 600;
    margin: 0.5em 0;
}

.note-content-editor h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin: 0.5em 0;
}

.note-content-editor ul,
.note-content-editor ol {
    padding-left: 1.5em;
    margin: 0.5em 0;
}

.note-content-editor li {
    margin: 0.25em 0;
}

/* Editor Toolbar */
.editor-toolbar {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-sm);
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-sm);
    flex-wrap: wrap;
}

.toolbar-group {
    display: flex;
    align-items: center;
    gap: 2px;
}

.toolbar-separator {
    width: 1px;
    height: 24px;
    background: var(--border-glass);
    margin: 0 var(--space-xs);
}

.toolbar-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.toolbar-btn:hover {
    background: var(--bg-glass-hover);
    color: var(--text-primary);
}

.toolbar-btn:active,
.toolbar-btn.active {
    background: var(--accent);
    color: white;
}

.toolbar-btn i,
.toolbar-btn svg {
    width: 16px;
    height: 16px;
}

.toolbar-select {
    padding: var(--space-xs) var(--space-sm);
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.75rem;
    cursor: pointer;
}

.toolbar-select option {
    background: var(--bg-secondary);
}

.toolbar-color {
    width: 28px;
    height: 28px;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    padding: 0;
    background: transparent;
}

.toolbar-color::-webkit-color-swatch-wrapper {
    padding: 2px;
}

.toolbar-color::-webkit-color-swatch {
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-glass);
}

/* ========================================
   Liquid Glass Popup Menus
   macOS Style Selection UI
   ======================================== */

/* Popup Container Base */
.liquid-popup {
    position: absolute;
    top: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%) translateY(8px);
    min-width: 200px;
    padding: var(--space-md);
    background: rgba(30, 30, 35, 0.85);
    backdrop-filter: blur(40px) saturate(180%);
    -webkit-backdrop-filter: blur(40px) saturate(180%);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: var(--radius-lg);
    box-shadow:
        0 20px 60px rgba(0, 0, 0, 0.5),
        0 0 0 1px rgba(255, 255, 255, 0.05) inset,
        0 1px 0 rgba(255, 255, 255, 0.1) inset;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 10000;
}

.liquid-popup.active {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateX(-50%) translateY(0);
}

.liquid-popup::before {
    content: '';
    position: absolute;
    top: -6px;
    left: 50%;
    transform: translateX(-50%) rotate(45deg);
    width: 12px;
    height: 12px;
    background: rgba(30, 30, 35, 0.85);
    border-left: 1px solid rgba(255, 255, 255, 0.12);
    border-top: 1px solid rgba(255, 255, 255, 0.12);
    backdrop-filter: blur(40px);
}

.popup-title {
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--space-sm);
    padding-bottom: var(--space-xs);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

/* ========================================
   Color Picker Popup - Simplified
   ======================================== */
.color-picker-popup {
    width: 260px;
    padding: var(--space-md);
}

.color-picker-popup .popup-title {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.color-picker-popup .popup-title i,
.color-picker-popup .popup-title svg {
    width: 14px;
    height: 14px;
    color: var(--accent);
}

/* Color Preview Bar */
.color-preview-bar {
    margin-bottom: var(--space-md);
}

.color-preview-swatch {
    width: 100%;
    height: 40px;
    border-radius: var(--radius-md);
    border: 2px solid rgba(255, 255, 255, 0.15);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2), inset 0 0 0 1px rgba(255, 255, 255, 0.05);
}

/* Color Presets - Rounded Squares */
.color-presets {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
    margin-bottom: var(--space-md);
}

.color-preset {
    width: 100%;
    aspect-ratio: 1;
    border-radius: 12px;
    border: 2px solid transparent;
    cursor: pointer;
    transition: all 0.15s ease;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.25);
}

.color-preset:hover {
    transform: scale(1.1);
    z-index: 1;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.35);
}

.color-preset.active {
    border-color: white;
    box-shadow: 0 0 0 2px var(--accent), 0 4px 12px rgba(0, 0, 0, 0.3);
}

/* RGB Inputs */
.rgb-inputs-container {
    display: flex;
    gap: var(--space-sm);
    padding-top: var(--space-sm);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.rgb-input-group {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.rgb-input-group input {
    width: 100%;
    padding: var(--space-xs) var(--space-sm);
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.9rem;
    font-family: 'SF Mono', 'Menlo', monospace;
    text-align: center;
}

.rgb-input-group input:focus {
    outline: none;
    border-color: var(--accent);
    background: rgba(0, 122, 255, 0.1);
}

.rgb-input-group label {
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--text-muted);
}

.rgb-input-group label.r {
    color: #ff6b6b;
}

.rgb-input-group label.g {
    color: #51cf66;
}

.rgb-input-group label.b {
    color: #74b9ff;
}

.rgb-input-group {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.rgb-input-group input {
    width: 100%;
    padding: var(--space-xs) var(--space-sm);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.875rem;
    font-family: 'SF Mono', 'Menlo', monospace;
    text-align: center;
}

.rgb-input-group input:focus {
    outline: none;
    border-color: var(--accent);
    background: rgba(0, 122, 255, 0.1);
}

.rgb-input-group label {
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--text-muted);
}

.rgb-input-group label.r {
    color: #ff6b6b;
}

.rgb-input-group label.g {
    color: #51cf66;
}

.rgb-input-group label.b {
    color: #339af0;
}

/* Hex Input */
.hex-input-group {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    margin-top: var(--space-sm);
}

.hex-input-group input {
    flex: 1;
    padding: var(--space-sm);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.875rem;
    font-family: 'SF Mono', 'Menlo', monospace;
}

.hex-input-group input:focus {
    outline: none;
    border-color: var(--accent);
}

.hex-input-group label {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 500;
}

/* ========================================
   Font Selector Popup
   ======================================== */
.font-selector-popup {
    width: 220px;
    max-height: 320px;
    padding: var(--space-sm);
}

.font-search {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-sm);
}

.font-search i,
.font-search svg {
    width: 14px;
    height: 14px;
    color: var(--text-muted);
}

.font-search input {
    flex: 1;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 0.875rem;
}

.font-search input:focus {
    outline: none;
}

.font-search input::placeholder {
    color: var(--text-muted);
}

.font-list {
    max-height: 240px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.font-option {
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.15s ease;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.font-option:hover {
    background: rgba(255, 255, 255, 0.08);
}

.font-option.active {
    background: rgba(0, 122, 255, 0.2);
    color: var(--accent);
}

.font-option .font-name {
    font-size: 0.9rem;
}

.font-option .font-preview {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.font-option.active .font-preview {
    color: var(--accent);
}

.font-option i,
.font-option svg {
    width: 14px;
    height: 14px;
    opacity: 0;
}

.font-option.active i,
.font-option.active svg {
    opacity: 1;
    color: var(--accent);
}

/* ========================================
   Paragraph Style Selector Popup
   ======================================== */
.paragraph-selector-popup {
    width: 200px;
    padding: var(--space-sm);
}

.paragraph-list {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.paragraph-option {
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.15s ease;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.paragraph-option:hover {
    background: rgba(255, 255, 255, 0.08);
}

.paragraph-option.active {
    background: rgba(0, 122, 255, 0.2);
}

.paragraph-option .para-icon {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-sm);
    margin-right: var(--space-sm);
}

.paragraph-option .para-icon i,
.paragraph-option .para-icon svg {
    width: 14px;
    height: 14px;
    color: var(--text-secondary);
}

.paragraph-option.active .para-icon {
    background: rgba(0, 122, 255, 0.2);
}

.paragraph-option.active .para-icon i,
.paragraph-option.active .para-icon svg {
    color: var(--accent);
}

.paragraph-option .para-label {
    flex: 1;
    font-size: 0.875rem;
}

.paragraph-option .para-sample {
    font-size: 0.7rem;
    color: var(--text-muted);
}

.paragraph-option.h1 .para-label {
    font-size: 1.1rem;
    font-weight: 700;
}

.paragraph-option.h2 .para-label {
    font-size: 1rem;
    font-weight: 600;
}

.paragraph-option.h3 .para-label {
    font-size: 0.95rem;
    font-weight: 600;
}

.paragraph-option i.check-icon,
.paragraph-option svg.check-icon {
    width: 14px;
    height: 14px;
    opacity: 0;
    color: var(--accent);
}

.paragraph-option.active i.check-icon,
.paragraph-option.active svg.check-icon {
    opacity: 1;
}

/* ========================================
   Text Size Selector Popup
   ======================================== */
.size-selector-popup {
    width: 200px;
    padding: var(--space-md);
}

.size-slider-container {
    margin-bottom: var(--space-md);
}

.size-slider-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-sm);
}

.size-slider-header .size-label {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.size-slider-header .size-value {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
    background: rgba(0, 122, 255, 0.15);
    padding: 2px 8px;
    border-radius: var(--radius-sm);
}

.size-slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: rgba(255, 255, 255, 0.1);
    outline: none;
    cursor: pointer;
}

.size-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: linear-gradient(135deg, #fff 0%, #e0e0e0 100%);
    cursor: grab;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    transition: transform 0.15s ease;
}

.size-slider::-webkit-slider-thumb:hover {
    transform: scale(1.1);
}

.size-slider::-webkit-slider-thumb:active {
    cursor: grabbing;
    transform: scale(0.95);
}

.size-slider::-moz-range-thumb {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: linear-gradient(135deg, #fff 0%, #e0e0e0 100%);
    cursor: grab;
    border: none;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.size-presets {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 6px;
    padding-top: var(--space-sm);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.size-preset {
    padding: var(--space-xs) var(--space-sm);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 0.75rem;
    font-weight: 500;
    cursor: pointer;
    text-align: center;
    transition: all 0.15s ease;
}

.size-preset:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}

.size-preset.active {
    background: rgba(0, 122, 255, 0.2);
    border-color: var(--accent);
    color: var(--accent);
}

/* Size Preview */
.size-preview {
    margin-top: var(--space-md);
    padding: var(--space-sm);
    background: rgba(255, 255, 255, 0.03);
    border-radius: var(--radius-sm);
    text-align: center;
    color: var(--text-secondary);
    transition: font-size 0.2s ease;
}

/* ========================================
   Toolbar Button with Popup
   ======================================== */
.toolbar-btn-container {
    position: relative;
}

.toolbar-btn-container .toolbar-btn-with-arrow {
    display: flex;
    align-items: center;
    gap: 2px;
    padding-right: var(--space-xs);
}

.toolbar-btn-container .toolbar-btn-with-arrow .arrow-icon {
    width: 10px;
    height: 10px;
    color: var(--text-muted);
    transition: transform 0.2s ease;
}

.toolbar-btn-container.active .toolbar-btn-with-arrow .arrow-icon {
    transform: rotate(180deg);
}

/* Color indicator on toolbar button */
.toolbar-color-indicator {
    width: 18px;
    height: 4px;
    border-radius: 2px;
    margin-top: 3px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

/* Font indicator on toolbar button */
.toolbar-font-indicator {
    font-size: 0.65rem;
    color: var(--text-muted);
    max-width: 50px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* Recent colors section */
.recent-colors {
    margin-bottom: var(--space-md);
}

.recent-colors-title {
    font-size: 0.65rem;
    color: var(--text-muted);
    margin-bottom: var(--space-xs);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.recent-colors-grid {
    display: flex;
    gap: 6px;
}

.recent-color {
    width: 24px;
    height: 24px;
    border-radius: 4px;
    border: 2px solid transparent;
    cursor: pointer;
    transition: all 0.15s ease;
}

.recent-color:hover {
    transform: scale(1.1);
    border-color: rgba(255, 255, 255, 0.3);
}

/* Eyedropper button */
.eyedropper-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.15s ease;
}

.eyedropper-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}

.eyedropper-btn i,
.eyedropper-btn svg {
    width: 16px;
    height: 16px;
}

/* Folders Section */
.folders-section,
.notes-section {
    margin-top: var(--space-md);
}

.section-title {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--space-sm);
}

.folders-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.folder-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.folder-item:hover {
    background: var(--bg-glass-hover);
}

.folder-item.active {
    background: var(--bg-glass-active);
    border-color: var(--accent);
}

.folder-item.drag-over {
    background: rgba(0, 122, 255, 0.2);
    border-color: var(--accent);
}

.folder-item i,
.folder-item svg {
    width: 16px;
    height: 16px;
    color: var(--accent);
}

.folder-item span {
    flex: 1;
    font-size: 0.875rem;
}

.folder-count {
    font-size: 0.75rem;
    color: var(--text-muted);
    background: var(--bg-glass);
    padding: 2px 6px;
    border-radius: var(--radius-full);
}

/* Note Item with Date */
.note-item-date {
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-top: var(--space-xs);
}

.note-item.dragging {
    opacity: 0.5;
    border: 2px dashed var(--accent);
}

/* Note Footer */
.note-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: var(--space-md);
    padding-top: var(--space-md);
    border-top: 1px solid var(--border-glass);
}

.note-footer-actions {
    display: flex;
    gap: var(--space-xs);
}

.footer-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.footer-btn:hover {
    background: var(--bg-glass-hover);
    color: var(--text-primary);
}

.footer-btn.danger:hover {
    background: rgba(255, 69, 58, 0.2);
    color: var(--danger);
    border-color: var(--danger);
}

.footer-btn i,
.footer-btn svg {
    width: 16px;
    height: 16px;
}

/* Sticky Notes */
.sticky-notes-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: var(--space-md);
}

.sticky-note {
    background: linear-gradient(135deg, rgba(255, 235, 59, 0.2) 0%, rgba(255, 193, 7, 0.15) 100%);
    border: 1px solid rgba(255, 235, 59, 0.3);
    border-radius: var(--radius-lg);
    padding: var(--space-sm) var(--space-md);
    min-height: 80px;
    max-height: 120px;
    display: flex;
    flex-direction: column;
    position: relative;
    transition: all var(--transition-normal);
}

.sticky-note:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.sticky-note.pink {
    background: linear-gradient(135deg, rgba(255, 105, 180, 0.2) 0%, rgba(255, 20, 147, 0.15) 100%);
    border-color: rgba(255, 105, 180, 0.3);
}

.sticky-note.blue {
    background: linear-gradient(135deg, rgba(100, 181, 246, 0.2) 0%, rgba(33, 150, 243, 0.15) 100%);
    border-color: rgba(100, 181, 246, 0.3);
}

.sticky-note.green {
    background: linear-gradient(135deg, rgba(129, 199, 132, 0.2) 0%, rgba(76, 175, 80, 0.15) 100%);
    border-color: rgba(129, 199, 132, 0.3);
}

.sticky-note.purple {
    background: linear-gradient(135deg, rgba(186, 104, 200, 0.2) 0%, rgba(156, 39, 176, 0.15) 100%);
    border-color: rgba(186, 104, 200, 0.3);
}

.sticky-note-header {
    display: flex;
    justify-content: flex-end;
    gap: var(--space-xs);
    margin-bottom: var(--space-sm);
}

.sticky-note-header button {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: var(--space-xs);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.sticky-note:hover .sticky-note-header button {
    opacity: 1;
}

.sticky-note-header button:hover {
    color: var(--text-primary);
}

.sticky-note-content {
    flex: 1;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 0.875rem;
    line-height: 1.5;
    resize: none;
}

.sticky-note-content:focus {
    outline: none;
}

/* To-Do List */
.todo-container {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.todo-filters {
    display: flex;
    gap: var(--space-xs);
}

.filter-btn {
    padding: var(--space-xs) var(--space-md);
    background: transparent;
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-full);
    color: var(--text-secondary);
    font-size: 0.875rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--bg-glass-hover);
    color: var(--text-primary);
}

.todo-input-container {
    display: flex;
    gap: var(--space-sm);
}

.todo-input {
    flex: 1;
    padding: var(--space-md);
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 1rem;
}

.todo-input:focus {
    outline: none;
    border-color: var(--accent);
}

.todo-priority {
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 0.875rem;
    cursor: pointer;
}

.add-todo-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    background: var(--accent);
    border: none;
    border-radius: var(--radius-md);
    color: white;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.add-todo-btn:hover {
    background: var(--accent-hover);
}

.todo-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    min-height: 200px;
}

.todo-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md);
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.todo-item:hover {
    background: var(--bg-glass-hover);
}

.todo-item.completed .todo-text {
    text-decoration: line-through;
    color: var(--text-muted);
}

.todo-checkbox {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-glass-hover);
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.todo-checkbox:hover {
    border-color: var(--accent);
}

.todo-checkbox.checked {
    background: var(--accent);
    border-color: var(--accent);
}

.todo-checkbox.checked i,
.todo-checkbox.checked svg {
    color: white;
    width: 14px;
    height: 14px;
}

.todo-text {
    flex: 1;
}

.todo-priority-badge {
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-full);
    font-size: 0.625rem;
    font-weight: 600;
    text-transform: uppercase;
}

.todo-priority-badge.high {
    background: rgba(255, 69, 58, 0.2);
    color: var(--danger);
}

.todo-priority-badge.medium {
    background: rgba(255, 159, 10, 0.2);
    color: var(--warning);
}

.todo-priority-badge.low {
    background: rgba(48, 209, 88, 0.2);
    color: var(--success);
}

.todo-delete {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: var(--space-xs);
    opacity: 0;
    transition: all var(--transition-fast);
}

.todo-item:hover .todo-delete {
    opacity: 1;
}

.todo-delete:hover {
    color: var(--danger);
}

.todo-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: var(--space-md);
    border-top: 1px solid var(--border-glass);
}

.todo-footer span {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.clear-completed-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 0.875rem;
    cursor: pointer;
    transition: color var(--transition-fast);
}

.clear-completed-btn:hover {
    color: var(--danger);
}

@media (max-width: 768px) {
    .notepad-container {
        grid-template-columns: 1fr;
    }

    .notes-sidebar {
        max-height: 200px;
    }
}

/* Tag Modal Styles */
.existing-tags-section {
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-md);
    border-bottom: 1px solid var(--border-glass);
}

.section-label {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: var(--space-sm);
}

.existing-tags-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.existing-tag-option {
    padding: 4px 12px;
    border-radius: 20px;
    color: white;
    font-size: 0.85rem;
    cursor: pointer;
    border: none;
    transition: transform var(--transition-fast), opacity var(--transition-fast);
    opacity: 0.9;
}

.existing-tag-option:hover {
    opacity: 1;
    transform: translateY(-1px);
}

/* ========================================
   Mobile Optimization (Components)
   ======================================== */
@media (max-width: 768px) {

    /* Compact Calculator */
    .calculator {
        max-width: 100%;
        margin: 0;
    }

    .calc-btn {
        height: 52px;
        /* Smaller touch targets */
        font-size: 1.1rem;
    }

    .calc-input {
        font-size: 2rem;
    }

    .calc-display {
        padding: var(--space-md);
        margin-bottom: var(--space-md);
    }

    /* 2-Column Grids for Mobile */
    .sticky-notes-container,
    .quick-links-grid,
    .ambient-grid {
        display: grid;
        grid-template-columns: repeat(2, 1fr) !important;
        gap: var(--space-sm);
    }

    .sticky-note {
        min-height: 120px;
    }

    /* ========================================
       Master-Detail View (Notepad) 
       ======================================== */
    /* Stack Notepad */
    /* Stack Notepad */
    .notepad-container {
        display: block !important;
        position: relative;
        /* Reverted Height to 60vh */
        height: 60vh !important;
        max-height: 60vh !important;

        /* Full Width but with Padding (Margins) */
        width: 100% !important;
        max-width: 100% !important;
        margin: 0 !important;
        padding: 0 24px !important;
        /* REAL SCREEN MARGINS */

        overflow: hidden;
        box-sizing: border-box !important;
    }

    /* State 1: List Visible (Default) */
    .notes-sidebar {
        width: 100% !important;
        height: 100% !important;
        max-height: none !important;
        display: block;
        overflow-y: auto !important;
        padding-right: 0;
        border-bottom: none;
    }

    .note-editor {
        display: none;
        /* Hidden by default */
        width: 100%;
        height: 100%;
        flex-direction: column;
        padding: 0 !important;
        margin: 0 !important;
        box-sizing: border-box !important;
    }

    /* State 2: Editor Visible (Active) */
    .notepad-container.show-editor .notes-sidebar {
        display: none !important;
    }

    .notepad-container.show-editor .note-editor {
        display: flex !important;
    }

    /* Mobile Back Button */
    .mobile-back-btn {
        display: flex !important;
        align-items: center;
        gap: 6px;
        padding: 8px 12px;
        margin-bottom: 12px;
        background: rgba(255, 255, 255, 0.1);
        border: 1px solid var(--border-glass);
        border-radius: 8px;
        color: var(--text-primary);
        font-size: 0.9rem;
        cursor: pointer;
        width: fit-content;
    }

    /* Toolbar Tweaks */
    .editor-toolbar {
        display: flex !important;
        flex-wrap: nowrap !important;
        overflow-x: auto !important;
        width: 100%;
        padding-bottom: 8px;
        mask-image: linear-gradient(to right, black 85%, transparent 100%);
    }

    .note-content-editor {
        min-height: 0 !important;
        max-width: 100% !important;
        width: 100% !important;
        box-sizing: border-box !important;
        flex: 1;
        overflow-y: auto !important;

        /* Balanced Padding: Enough to not touch edge, small enough to be wide */
        padding: 12px !important;

        overflow-x: hidden !important;

        /* FORCE WRAPPING */
        word-break: break-word !important;
        overflow-wrap: break-word !important;
        white-space: pre-wrap !important;
    }

}