/**
 * CSS Stylesheet for Notes Application
 * Google Keep Clone - Responsive Design
 */

/* ====================
   CSS Variables & Root
   ==================== */

:root {
    --primary-color: #1f2937;
    --primary-light: #374151;
    --primary-lighter: #4b5563;
    --secondary-color: #3b82f6;
    --secondary-dark: #1e40af;
    --accent-color: #f59e0b;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    
    --bg-primary: #ffffff;
    --bg-secondary: #f3f4f6;
    --bg-tertiary: #e5e7eb;
    
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-tertiary: #9ca3af;
    
    --border-color: #d1d5db;
    --border-color-light: #e5e7eb;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s ease-in-out;
}

/* Dark Mode */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-primary: #1f2937;
        --bg-secondary: #111827;
        --bg-tertiary: #374151;
        --text-primary: #f3f4f6;
        --text-secondary: #d1d5db;
        --text-tertiary: #9ca3af;
        --border-color: #374151;
        --border-color-light: #4b5563;
    }
}

/* ====================
   Global Styles
   ==================== */

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
        'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
        sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.5;
}

/* ====================
   Typography
   ==================== */

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: 0.5rem;
}

h1 {
    font-size: 2rem;
}

h2 {
    font-size: 1.5rem;
}

h3 {
    font-size: 1.25rem;
}

p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

a {
    color: var(--secondary-color);
    text-decoration: none;
    transition: var(--transition-fast);
}

a:hover {
    color: var(--secondary-dark);
    text-decoration: underline;
}

/* ====================
   Forms & Inputs
   ==================== */

input, textarea, select {
    font-family: inherit;
    font-size: 1rem;
    border: 1px solid var(--border-color);
    border-radius: 0.375rem;
    padding: 0.75rem;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    transition: var(--transition-fast);
}

input:focus, textarea:focus, select:focus {
    outline: none;
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

textarea {
    resize: vertical;
    min-height: 100px;
}

input::placeholder, textarea::placeholder {
    color: var(--text-tertiary);
}

/* ====================
   Buttons
   ==================== */

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 500;
    border: none;
    border-radius: 0.375rem;
    cursor: pointer;
    transition: var(--transition-fast);
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

.btn:hover {
    background-color: var(--border-color);
}

.btn:active {
    transform: scale(0.98);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.btn-primary {
    background-color: var(--secondary-color);
    color: white;
}

.btn-primary:hover {
    background-color: var(--secondary-dark);
}

.btn-secondary {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

.btn-danger {
    background-color: var(--danger-color);
    color: white;
}

.btn-danger:hover {
    background-color: #dc2626;
}

.btn-success {
    background-color: var(--success-color);
    color: white;
}

.btn-success:hover {
    background-color: #059669;
}

.btn-block {
    width: 100%;
    justify-content: center;
}

.btn-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    padding: 0;
    background-color: transparent;
    color: var(--text-secondary);
    border: none;
    border-radius: 0.375rem;
    cursor: pointer;
    transition: var(--transition-fast);
}

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

.btn-logout {
    width: 100%;
    background-color: transparent;
    color: var(--text-secondary);
    padding: 0.5rem;
    font-size: 0.875rem;
}

.btn-logout:hover {
    background-color: var(--danger-color);
    color: white;
}

/* ====================
   Modal
   ==================== */

.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    animation: fadeIn 0.3s ease-in-out;
}

.modal.active {
    display: flex;
}

.modal-content {
    background-color: var(--bg-primary);
    border-radius: 0.75rem;
    box-shadow: var(--shadow-xl);
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
    animation: slideUp 0.3s ease-out;
}

@keyframes slideUp {
    from {
        transform: translateY(100px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* ====================
   Authentication
   ==================== */

.auth-modal {
    max-width: 450px;
    padding: 3rem;
}

.auth-container {
    display: grid;
    grid-template-columns: 1fr;
}

.auth-form {
    display: none;
    animation: fadeIn 0.3s ease-in-out;
}

.auth-form.active {
    display: block;
}

.auth-header {
    text-align: center;
    margin-bottom: 2rem;
}

.auth-header h2 {
    font-size: 1.75rem;
    margin-bottom: 0.5rem;
}

.auth-header p {
    color: var(--text-secondary);
    margin-bottom: 0;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-primary);
}

.form-group input {
    width: 100%;
}

.auth-footer {
    text-align: center;
    margin-top: 1.5rem;
}

.auth-footer p {
    color: var(--text-secondary);
    margin-bottom: 0;
    font-size: 0.875rem;
}

/* ====================
   App Layout
   ==================== */

.app-container {
    display: grid;
    grid-template-columns: 280px 1fr;
    height: 100vh;
    overflow: hidden;
}

@media (max-width: 1024px) {
    .app-container {
        grid-template-columns: 1fr;
    }
}

/* ====================
   Sidebar
   ==================== */

.sidebar {
    display: flex;
    flex-direction: column;
    background-color: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    overflow-y: auto;
    padding-bottom: 1rem;
}

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--secondary-color);
}

.logo i {
    font-size: 1.75rem;
}

.sidebar-search {
    position: relative;
    margin: 1rem;
}

.search-box {
    width: 100%;
    padding-left: 2.5rem;
}

.search-icon {
    position: absolute;
    left: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-tertiary);
    pointer-events: none;
}

.sidebar-nav {
    flex: 1;
    padding: 1rem 0;
}

.nav-section {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem 1.5rem;
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition-fast);
    font-size: 1rem;
    width: 100%;
    text-align: left;
}

.nav-item:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

.nav-item.active {
    background-color: var(--secondary-color);
    color: white;
}

.nav-item i {
    font-size: 1.25rem;
    min-width: 1.5rem;
    text-align: center;
}

.sidebar-footer {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    padding: 1rem;
    border-top: 1px solid var(--border-color);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem;
    border-radius: 0.375rem;
    background-color: var(--bg-primary);
}

.user-avatar {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    background-color: var(--secondary-color);
    color: white;
    font-size: 1.25rem;
}

.user-details {
    flex: 1;
    min-width: 0;
}

.user-name {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.125rem;
    font-size: 0.875rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.user-email {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    margin-bottom: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

@media (max-width: 1024px) {
    .sidebar {
        position: fixed;
        left: 0;
        top: 0;
        width: 280px;
        height: 100vh;
        z-index: 999;
        transform: translateX(-100%);
        transition: var(--transition);
    }

    .sidebar.open {
        transform: translateX(0);
    }
}

/* ====================
   Main Content
   ==================== */

.main-content {
    display: flex;
    flex-direction: column;
    background-color: var(--bg-primary);
    overflow: hidden;
}

.app-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.5rem 2rem;
    border-bottom: 1px solid var(--border-color);
    background-color: var(--bg-primary);
}

.header-left {
    flex: 1;
}

#pageTitle {
    margin-bottom: 0;
    font-size: 1.75rem;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.view-options {
    display: flex;
    gap: 0.25rem;
}

.view-btn {
    padding: 0.5rem;
    width: 2.5rem;
    height: 2.5rem;
    background-color: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: 0.375rem;
    transition: var(--transition-fast);
    font-size: 1.25rem;
}

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

.view-btn.active {
    background-color: var(--secondary-color);
    color: white;
}

.notes-container {
    flex: 1;
    overflow-y: auto;
    padding: 2rem;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

.notes-container.list-view {
    grid-template-columns: 1fr;
    max-width: 100%;
}

@media (max-width: 1024px) {
    .notes-container {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    }

    .notes-container.list-view {
        grid-template-columns: 1fr;
    }

    .app-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }

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

@media (max-width: 640px) {
    .notes-container {
        grid-template-columns: 1fr;
        padding: 1rem;
        gap: 1rem;
    }

    .app-header {
        padding: 1rem;
    }

    #pageTitle {
        font-size: 1.5rem;
    }
}

/* ====================
   Empty State
   ==================== */

.empty-state {
    grid-column: 1 / -1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 400px;
    color: var(--text-tertiary);
    text-align: center;
}

.empty-state i {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

.empty-state h3 {
    font-size: 1.25rem;
    color: var(--text-secondary);
}

.empty-state p {
    color: var(--text-tertiary);
}

/* ====================
   Note Card
   ==================== */

.note-card {
    display: flex;
    flex-direction: column;
    padding: 1.5rem;
    border-radius: 0.5rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color-light);
    transition: var(--transition);
    cursor: pointer;
    position: relative;
    overflow: hidden;
    background-color: var(--bg-primary);
}

.note-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.note-card.list-view {
    flex-direction: row;
    align-items: center;
    padding: 1rem 1.5rem;
}

.note-card.colored-white {
    background-color: #FFFFFF;
}

.note-card.colored-#FFE082 {
    background-color: #FFE082;
}

.note-card.colored-#C5E1A5 {
    background-color: #C5E1A5;
}

.note-card.colored-#B3E5FC {
    background-color: #B3E5FC;
}

.note-card.colored-#F8BBD0 {
    background-color: #F8BBD0;
}

.note-card.colored-#FFCCBC {
    background-color: #FFCCBC;
}

.note-card.colored-#E1BEE7 {
    background-color: #E1BEE7;
}

.note-card.colored-#ECEFF1 {
    background-color: #ECEFF1;
}

.note-card-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: 1rem;
    gap: 0.5rem;
}

.note-card.list-view .note-card-header {
    margin-bottom: 0;
    flex: 1;
}

.note-title {
    font-weight: 600;
    font-size: 1.125rem;
    color: var(--text-primary);
    margin: 0;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    word-break: break-word;
}

.note-card-actions {
    display: flex;
    gap: 0.25rem;
}

.note-card-actions .btn-icon {
    width: 2rem;
    height: 2rem;
}

.note-card-content {
    color: var(--text-primary);
    font-size: 0.875rem;
    line-height: 1.5;
    margin-bottom: 1rem;
    overflow: hidden;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    word-break: break-word;
}

.note-card.list-view .note-card-content {
    display: none;
}

.note-card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--text-tertiary);
    margin-top: auto;
    padding-top: 0.5rem;
    border-top: 1px solid rgba(0, 0, 0, 0.1);
}

.note-card.list-view .note-card-footer {
    display: none;
}

.note-timestamp {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.pin-indicator {
    font-size: 0.875rem;
}

/* ====================
   Note Editor Modal
   ==================== */

.note-editor {
    width: 90%;
    max-width: 700px;
    display: flex;
    flex-direction: column;
    height: auto;
    max-height: 90vh;
}

.editor-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.5rem 1.5rem 1rem;
    border-bottom: 1px solid var(--border-color);
}

.note-title-input {
    flex: 1;
    font-size: 1.5rem;
    font-weight: 600;
    border: none;
    padding: 0;
    padding-right: 1rem;
    background: transparent;
    color: var(--text-primary);
}

.note-title-input:focus {
    box-shadow: none;
    border: none;
}

.editor-content {
    flex: 1;
    padding: 1.5rem;
    overflow-y: auto;
}

.note-content-input {
    width: 100%;
    min-height: 200px;
    max-height: 400px;
    border: none;
    padding: 0;
    background: transparent;
    color: var(--text-primary);
    resize: vertical;
    font-size: 1rem;
    line-height: 1.6;
}

.note-content-input:focus {
    box-shadow: none;
    border: none;
}

.editor-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-color);
    background-color: var(--bg-secondary);
}

.toolbar-left, .toolbar-right {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.color-picker {
    position: relative;
}

.color-palette {
    position: absolute;
    bottom: 100%;
    left: 0;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.5rem;
    padding: 0.75rem;
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 0.375rem;
    box-shadow: var(--shadow-lg);
    margin-bottom: 0.5rem;
    z-index: 10;
}

.color-option {
    width: 2.5rem;
    height: 2.5rem;
    border: 2px solid transparent;
    border-radius: 0.375rem;
    cursor: pointer;
    transition: var(--transition-fast);
}

.color-option:hover {
    transform: scale(1.1);
    border-color: var(--secondary-color);
}

.color-option.selected {
    border-color: var(--secondary-color);
    box-shadow: inset 0 0 0 2px var(--secondary-color);
}

.editor-info {
    padding: 0.75rem 1.5rem;
    background-color: var(--bg-secondary);
    color: var(--text-tertiary);
    font-size: 0.75rem;
}

/* ====================
   Notification Toast
   ==================== */

.notification-toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--text-primary);
    color: var(--bg-primary);
    padding: 1rem 1.5rem;
    border-radius: 0.375rem;
    box-shadow: var(--shadow-lg);
    max-width: 500px;
    display: none;
    animation: slideUp 0.3s ease-out;
    z-index: 2000;
}

.notification-toast.show {
    display: block;
}

.notification-toast.success {
    background-color: var(--success-color);
}

.notification-toast.error {
    background-color: var(--danger-color);
}

.notification-toast.warning {
    background-color: var(--warning-color);
}

.notification-toast.info {
    background-color: var(--secondary-color);
}

/* ====================
   Loading Spinner
   ==================== */

.loading-spinner {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 1999;
    display: flex;
    align-items: center;
    justify-content: center;
}

.spinner {
    width: 3rem;
    height: 3rem;
    border: 3px solid var(--bg-tertiary);
    border-top-color: var(--secondary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* ====================
   Pinned Note Indicator
   ==================== */

.note-card.pinned::before {
    content: '';
    position: absolute;
    top: 0.75rem;
    right: 0.75rem;
    width: 0.5rem;
    height: 0.5rem;
    border-radius: 50%;
    background-color: var(--secondary-color);
    opacity: 0.7;
}

/* ====================
   Responsive Design
   ==================== */

@media (max-width: 768px) {
    .app-container {
        height: 100%;
    }

    .sidebar {
        width: 100%;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }

    .note-editor {
        width: 100%;
        height: 100vh;
        border-radius: 0;
    }
}

@media (max-width: 640px) {
    .modal-content {
        width: 95%;
        margin: 0 auto;
    }

    .auth-modal {
        padding: 2rem 1.5rem;
    }

    .app-header {
        flex-wrap: wrap;
    }

    .header-right {
        width: 100%;
    }
}

/* ====================
   Utility Classes
   ==================== */

.d-none {
    display: none !important;
}

.d-block {
    display: block !important;
}

.d-flex {
    display: flex !important;
}

.opacity-50 {
    opacity: 0.5;
}

.text-center {
    text-align: center;
}

.text-muted {
    color: var(--text-tertiary);
}

.mt-1 {
    margin-top: 0.5rem;
}

.mt-2 {
    margin-top: 1rem;
}

.mb-1 {
    margin-bottom: 0.5rem;
}

.mb-2 {
    margin-bottom: 1rem;
}

.gap-1 {
    gap: 0.5rem;
}

.gap-2 {
    gap: 1rem;
}

/* ====================
   Print Styles
   ==================== */

@media print {
    .sidebar, .app-header, .editor-toolbar, .editor-info {
        display: none;
    }

    .note-card {
        page-break-inside: avoid;
        box-shadow: none;
        border: 1px solid #ddd;
    }
}

/* ====================
   Accessibility
   ==================== */

@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus visible for keyboard navigation */
:focus-visible {
    outline: 2px solid var(--secondary-color);
    outline-offset: 2px;
}

button:focus-visible {
    outline: 2px solid var(--secondary-color);
    outline-offset: -2px;
}

/* ====================
   Settings Modal
   ==================== */

.settings-modal {
    width: 90%;
    max-width: 800px;
    max-height: 80vh;
}

.settings-tabs {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.tabs-header {
    display: flex;
    gap: 10px;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 20px;
    overflow-x: auto;
}

.tab-btn {
    padding: 12px 20px;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-secondary);
    font-weight: 500;
    border-bottom: 3px solid transparent;
    transition: var(--transition-fast);
}

.tab-btn:hover {
    color: var(--text-primary);
}

.tab-btn.active {
    color: var(--secondary-color);
    border-bottom-color: var(--secondary-color);
}

.tab-content {
    display: none;
    overflow-y: auto;
    max-height: 400px;
}

.tab-content.active {
    display: block;
}

.settings-item {
    margin-bottom: 25px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-color-light);
}

.settings-item:last-child {
    border-bottom: none;
}

.settings-item label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--text-primary);
}

.settings-item select,
.settings-item input[type="number"],
.settings-item input[type="date"] {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 14px;
    background-color: var(--bg-primary);
    color: var(--text-primary);
}

.checkbox-group {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    font-size: 14px;
}

.checkbox-label input[type="checkbox"] {
    cursor: pointer;
    width: 18px;
    height: 18px;
}

.theme-selector {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    gap: 10px;
}

.theme-option {
    padding: 15px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-secondary);
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    transition: var(--transition-fast);
}

.theme-option:hover {
    border-color: var(--secondary-color);
}

.theme-option.active {
    border-color: var(--secondary-color);
    background: var(--secondary-color);
    color: white;
}

.font-size-selector,
.layout-selector {
    display: flex;
    gap: 10px;
}

.font-btn {
    flex: 1;
    padding: 12px;
    border: 2px solid var(--border-color);
    border-radius: 4px;
    background: var(--bg-secondary);
    cursor: pointer;
    font-size: 16px;
    font-weight: 600;
    transition: var(--transition-fast);
}

.font-btn:nth-child(1) {
    font-size: 12px;
}

.font-btn:nth-child(3) {
    font-size: 20px;
}

.font-btn:hover,
.font-btn.active {
    border-color: var(--secondary-color);
    background: var(--secondary-color);
    color: white;
}

.layout-btn {
    flex: 1;
    padding: 12px;
    border: 2px solid var(--border-color);
    border-radius: 4px;
    background: var(--bg-secondary);
    cursor: pointer;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.layout-btn:hover {
    border-color: var(--secondary-color);
}

.layout-btn.active {
    border-color: var(--secondary-color);
    background: var(--secondary-color);
    color: white;
}

.button-group,
.button-group-vertical {
    display: flex;
    gap: 10px;
}

.button-group-vertical {
    flex-direction: column;
}

.info-text {
    display: block;
    margin-top: 8px;
    color: var(--text-tertiary);
    font-size: 12px;
}

/* ====================
   Analytics Modal
   ==================== */

.analytics-modal {
    width: 90%;
    max-width: 900px;
    max-height: 85vh;
}

.analytics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
    margin-bottom: 30px;
}

.analytics-card {
    display: flex;
    gap: 15px;
    padding: 20px;
    background: var(--bg-secondary);
    border-radius: 8px;
    border-left: 4px solid var(--secondary-color);
    transition: var(--transition);
}

.analytics-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.analytics-icon {
    font-size: 28px;
    color: var(--secondary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 50px;
}

.analytics-content h3 {
    margin: 0 0 5px 0;
    font-size: 14px;
    color: var(--text-secondary);
    text-transform: uppercase;
}

.analytics-value {
    margin: 0;
    font-size: 28px;
    font-weight: bold;
    color: var(--secondary-color);
}

.analytics-section {
    margin-bottom: 30px;
}

.analytics-section h3 {
    margin-bottom: 15px;
    color: var(--text-primary);
}

.color-distribution {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.color-bar-item {
    display: flex;
    align-items: center;
    gap: 10px;
}

.color-bar {
    flex: 1;
    height: 20px;
    background: var(--bg-tertiary);
    border-radius: 4px;
    overflow: hidden;
}

.bar-fill {
    height: 100%;
    background: var(--secondary-color);
    transition: var(--transition);
}

.activity-timeline {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.timeline-item {
    display: flex;
    gap: 15px;
    padding: 12px;
    background: var(--bg-secondary);
    border-radius: 4px;
}

.timeline-dot {
    width: 12px;
    height: 12px;
    background: var(--secondary-color);
    border-radius: 50%;
    margin-top: 4px;
    flex-shrink: 0;
}

.timeline-content h4 {
    margin: 0 0 4px 0;
    color: var(--text-primary);
}

.timeline-content small {
    color: var(--text-tertiary);
}

.storage-info {
    background: var(--bg-secondary);
    padding: 15px;
    border-radius: 8px;
}

.storage-bar {
    height: 30px;
    background: var(--bg-tertiary);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 10px;
}

.storage-used {
    height: 100%;
    background: linear-gradient(90deg, var(--secondary-color), var(--success-color));
    transition: var(--transition);
}

/* ====================
   Help Modal
   ==================== */

.help-modal {
    width: 90%;
    max-width: 900px;
}

.help-modal.large {
    max-height: 85vh;
}

.help-content {
    overflow-y: auto;
    max-height: 500px;
}

.shortcuts-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 15px;
    margin-bottom: 30px;
}

.shortcut-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 12px;
    background: var(--bg-secondary);
    border-radius: 4px;
    border-left: 3px solid var(--secondary-color);
}

.shortcut-keys {
    display: flex;
    gap: 5px;
    flex-shrink: 0;
}

.shortcut-keys kbd {
    padding: 4px 8px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 3px;
    font-family: monospace;
    font-size: 12px;
}

.shortcut-desc {
    color: var(--text-secondary);
    font-size: 14px;
}

.help-section {
    margin-bottom: 25px;
}

.help-section h4 {
    color: var(--secondary-color);
    margin-bottom: 10px;
}

.help-section p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 10px;
}

.help-section ul {
    margin: 10px 0 10px 20px;
    color: var(--text-secondary);
    line-height: 1.8;
}

.help-section li {
    margin-bottom: 8px;
}

/* ====================
   Theme Switcher Toast
   ==================== */

.theme-switcher {
    position: fixed;
    bottom: 100px;
    right: 20px;
    z-index: 100;
}

.theme-switcher .btn-icon {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--secondary-color);
    color: white;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 20px;
    box-shadow: var(--shadow-lg);
    transition: var(--transition);
}

.theme-switcher .btn-icon:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-xl);
}

/* ====================
   Quick Action Bar
   ==================== */

.quick-action-bar {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 100;
}

.quick-actions {
    display: flex;
    gap: 10px;
    background: var(--bg-primary);
    padding: 12px;
    border-radius: 50px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
}

.quick-action-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--secondary-color);
    color: white;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
    font-size: 16px;
}

.quick-action-btn:hover {
    background: var(--secondary-dark);
    transform: scale(1.1);
}

/* ====================
   Advanced Search Panel
   ==================== */

.advanced-search-panel {
    position: fixed;
    top: 100px;
    right: 20px;
    width: 300px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 15px;
    box-shadow: var(--shadow-lg);
    z-index: 200;
    max-height: 80vh;
    overflow-y: auto;
}

.search-filters {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.filter-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.filter-group label {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 13px;
    text-transform: uppercase;
}

.color-filter-buttons,
.status-filter-buttons {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
}

.color-filter-btn,
.status-filter-btn {
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: var(--bg-secondary);
    cursor: pointer;
    font-size: 13px;
    transition: var(--transition-fast);
}

.color-filter-btn:hover,
.status-filter-btn:hover {
    border-color: var(--secondary-color);
}

.color-filter-btn.active,
.status-filter-btn.active {
    background: var(--secondary-color);
    color: white;
    border-color: var(--secondary-color);
}

.filter-group input[type="date"] {
    padding: 8px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 13px;
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.filter-group .button-group {
    display: flex;
    gap: 8px;
}

.filter-group .btn {
    flex: 1;
    padding: 8px;
    font-size: 13px;
}

@media (max-width: 768px) {
    .advanced-search-panel {
        width: 100%;
        left: 0;
        right: 0;
        top: auto;
        bottom: 60px;
        border-radius: 8px 8px 0 0;
    }

    .quick-action-bar {
        bottom: 80px;
    }

    .theme-switcher {
        bottom: 140px;
    }

    .settings-modal,
    .analytics-modal,
    .help-modal {
        width: 100%;
        max-height: 90vh;
    }
}

/* ====================
   Modal Improvements
   ==================== */

.modal-content {
    display: flex;
    flex-direction: column;
    border-radius: 12px;
    max-height: 90vh;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h2 {
    margin: 0;
    color: var(--text-primary);
}

.btn-close {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--text-secondary);
    transition: var(--transition-fast);
}

.btn-close:hover {
    color: var(--text-primary);
    transform: scale(1.1);
}

.modal-body {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    padding: 20px;
    border-top: 1px solid var(--border-color);
}

.modal-footer .btn {
    padding: 10px 20px;
}

/* ====================
   Button Variants
   ==================== */

.btn-danger {
    background-color: var(--danger-color);
    color: white;
    border: none;
}

.btn-danger:hover {
    background-color: #d93a3a;
}

.btn-secondary {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background-color: var(--border-color);
}

/* ====================
   List View Layout
   ==================== */

.notes-container.list-view {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.notes-container.list-view .note-card {
    display: flex;
    align-items: center;
    height: auto;
    min-height: 80px;
    padding: 15px 20px;
}

.notes-container.list-view .note-title {
    margin-bottom: 5px;
}

.notes-container.list-view .note-preview {
    max-width: 100%;
    max-height: 40px;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* ====================
   Website Footer
   ==================== */

.website-footer {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 12px 20px;
    text-align: center;
    font-size: 0.875rem;
    color: var(--text-tertiary);
    z-index: 10;
}

.website-footer p {
    margin: 0;
    padding: 0;
}

.website-footer strong {
    color: var(--text-secondary);
    font-weight: 600;
}

@media (max-width: 768px) {
    .website-footer {
        font-size: 0.75rem;
        padding: 10px 15px;
    }
}

/* Website Footer */
.website-footer {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 12px 20px;
    text-align: center;
    font-size: 0.875rem;
    color: var(--text-tertiary);
    z-index: 10;
}

.website-footer p {
    margin: 0;
    padding: 0;
}

.website-footer strong {
    color: var(--text-secondary);
    font-weight: 600;
}

@media (max-width: 768px) {
    .website-footer {
        font-size: 0.75rem;
        padding: 10px 15px;
    }
}

/* ====================
   Advanced Modal Styles
   ==================== */

/* Analytics Modal */
.analytics-modal {
    min-width: 600px;
    max-height: 80vh;
    overflow-y: auto;
}

.analytics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.analytics-card {
    display: flex;
    align-items: center;
    padding: 20px;
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    transition: var(--transition);
}

.analytics-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.analytics-icon {
    font-size: 32px;
    color: var(--secondary-color);
    margin-right: 15px;
    min-width: 40px;
    text-align: center;
}

.analytics-content {
    flex: 1;
}

.analytics-content h4 {
    margin: 0 0 8px 0;
    font-size: 0.9rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.analytics-value {
    margin: 0;
    font-size: 1.8rem;
    font-weight: bold;
    color: var(--text-primary);
}

.analytics-section {
    margin: 30px 0;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.analytics-section h3 {
    margin-top: 0;
    color: var(--text-primary);
    font-size: 1.1rem;
}

.color-stats {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 15px;
}

.color-stat-item {
    display: flex;
    align-items: center;
    padding: 12px;
    background-color: var(--bg-secondary);
    border-radius: 6px;
    border: 1px solid var(--border-color);
}

.color-stat-color {
    width: 40px;
    height: 40px;
    border-radius: 4px;
    margin-right: 12px;
    border: 1px solid var(--border-color);
}

.color-stat-info {
    flex: 1;
}

.color-stat-info span {
    display: block;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.color-stat-info strong {
    display: block;
    margin-top: 4px;
    color: var(--text-primary);
}

.export-buttons {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-top: 15px;
}

.export-buttons .btn {
    flex: 1;
    min-width: 150px;
}

/* Settings Modal */
.settings-modal {
    min-width: 500px;
    max-height: 80vh;
    overflow-y: auto;
}

.settings-section {
    margin: 25px 0;
    padding: 20px 0;
    border-bottom: 1px solid var(--border-color);
}

.settings-section:last-child {
    border-bottom: none;
}

.settings-section h3 {
    margin-top: 0;
    margin-bottom: 15px;
    color: var(--text-primary);
    font-size: 1.05rem;
}

.settings-item {
    margin-bottom: 15px;
}

.settings-item label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-primary);
    font-weight: 500;
}

.settings-input {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-size: 0.95rem;
}

.settings-input:disabled {
    background-color: var(--bg-secondary);
    cursor: not-allowed;
    opacity: 0.7;
}

.checkbox-label {
    display: flex;
    align-items: center;
    cursor: pointer;
    user-select: none;
}

.checkbox-label input[type="checkbox"] {
    margin-right: 10px;
    cursor: pointer;
    width: 18px;
    height: 18px;
}

.checkbox-label span {
    color: var(--text-primary);
}

.settings-description {
    margin: 10px 0 0 0;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.btn-danger {
    background-color: var(--danger-color);
    color: white;
    transition: var(--transition);
}

.btn-danger:hover {
    background-color: #dc2626;
}

/* Help Modal */
.help-modal {
    min-width: 650px;
    max-height: 80vh;
    overflow-y: auto;
}

.help-section {
    margin: 25px 0;
    padding: 20px 0;
    border-bottom: 1px solid var(--border-color);
}

.help-section:last-child {
    border-bottom: none;
}

.help-section h3 {
    margin-top: 0;
    margin-bottom: 15px;
    color: var(--text-primary);
    font-size: 1.05rem;
}

.shortcuts-table {
    width: 100%;
    border-collapse: collapse;
    margin: 15px 0;
}

.shortcuts-table tr {
    display: flex;
    padding: 12px 0;
    border-bottom: 1px solid var(--border-color);
}

.shortcuts-table tr:last-child {
    border-bottom: none;
}

.shortcut-key {
    flex: 0 0 150px;
    font-family: 'Monaco', 'Courier New', monospace;
    font-weight: bold;
    color: var(--secondary-color);
    padding: 8px 12px;
    background-color: var(--bg-secondary);
    border-radius: 4px;
    font-size: 0.9rem;
}

.shortcut-desc {
    flex: 1;
    color: var(--text-primary);
    padding-left: 20px;
}

.help-content h4 {
    margin: 15px 0 8px 0;
    color: var(--text-primary);
    font-size: 0.95rem;
}

.help-content p {
    margin: 8px 0;
    color: var(--text-secondary);
    line-height: 1.5;
}

.help-content ul {
    margin: 8px 0;
    padding-left: 20px;
    color: var(--text-secondary);
}

.help-content li {
    margin: 6px 0;
    line-height: 1.5;
}

/* Change Password Modal */
.change-password-modal {
    min-width: 450px;
}

.form-control {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    font-size: 0.95rem;
}

.form-control:focus {
    outline: none;
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    color: var(--text-primary);
    font-weight: 500;
    font-size: 0.9rem;
}

/* Modal Improvements */
.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h2 {
    margin: 0;
    font-size: 1.3rem;
    color: var(--text-primary);
}

.modal-body {
    padding: 0;
}

/* Navigation Section Title */
.nav-section-title {
    margin: 15px 0 8px 0;
    padding: 0 15px;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-tertiary);
    font-weight: 600;
}

/* Enhanced Button Styles */
.btn-secondary {
    background-color: var(--primary-light);
    color: white;
    transition: var(--transition);
}

.btn-secondary:hover {
    background-color: var(--primary-lighter);
}

.btn-block {
    width: 100%;
    margin-top: 20px;
}

/* Responsive Design Improvements */
@media (max-width: 768px) {
    .analytics-modal,
    .settings-modal,
    .help-modal,
    .change-password-modal {
        min-width: 90vw;
        max-width: 90vw;
    }

    .analytics-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .color-stats {
        grid-template-columns: 1fr;
    }

    .export-buttons {
        flex-direction: column;
    }

    .export-buttons .btn {
        min-width: unset;
        width: 100%;
    }

    .shortcuts-table tr {
        flex-direction: column;
        gap: 8px;
    }

    .shortcut-key {
        flex: 1 1 auto;
    }

    .shortcut-desc {
        padding-left: 0;
    }
}

/* Dark Mode Enhancements */
@media (prefers-color-scheme: dark) {
    .analytics-card {
        background-color: #374151;
    }

    .analytics-card:hover {
        background-color: #4b5563;
    }

    .color-stat-item,
    .settings-input:disabled {
        background-color: #374151;
    }

    .shortcuts-table .shortcut-key {
        background-color: #374151;
    }
}

/* Accessibility Improvements */
.modal-content:focus-visible {
    outline: 3px solid var(--secondary-color);
    outline-offset: 2px;
}

.btn:focus-visible {
    outline: 2px solid var(--secondary-color);
    outline-offset: 2px;
}

/* Animation for modal entrance */
@keyframes slideUp {
    from {
        transform: translateY(20px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-content {
    animation: slideUp 0.3s ease-out;
}

/* Loading State */
@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

/* ====================
   Note Templates
   ==================== */

.templates-modal {
    width: 90%;
    max-width: 900px;
}

.templates-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.template-card {
    padding: 25px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-secondary);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.template-card:hover {
    border-color: var(--secondary-color);
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.template-icon {
    font-size: 40px;
    color: var(--secondary-color);
    margin-bottom: 15px;
}

.template-card h3 {
    margin: 10px 0 5px 0;
    color: var(--text-primary);
}

.template-card p {
    margin: 0;
    color: var(--text-secondary);
    font-size: 14px;
}

/* ====================
   Labels & Tags
   ==================== */

.labels-modal {
    width: 90%;
    max-width: 800px;
}

.label-creation {
    background: var(--bg-secondary);
    padding: 20px;
    border-radius: 8px;
    margin-bottom: 30px;
}

.label-creation h3 {
    margin-top: 0;
    color: var(--text-primary);
}

.label-input-group {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.label-input-group input {
    flex: 1;
    min-width: 150px;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 14px;
    background: var(--bg-primary);
    color: var(--text-primary);
}

.color-picker-group {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.color-dot {
    width: 30px;
    height: 30px;
    border-radius: 50%;
    border: 2px solid transparent;
    cursor: pointer;
    transition: var(--transition-fast);
}

.color-dot:hover {
    border-color: var(--text-primary);
    transform: scale(1.1);
}

.color-dot.selected {
    border-color: var(--text-primary);
    box-shadow: 0 0 10px rgba(0,0,0,0.2);
}

.labels-list,
.popular-tags {
    margin-bottom: 25px;
}

.labels-list h3,
.popular-tags h3 {
    color: var(--text-primary);
    margin-bottom: 15px;
}

.labels-container {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.label-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background: var(--bg-secondary);
    border-radius: 4px;
    transition: var(--transition-fast);
}

.label-item:hover {
    background: var(--bg-tertiary);
}

.label-color {
    flex-shrink: 0;
}

.label-name {
    flex: 1;
    font-weight: 500;
    color: var(--text-primary);
}

.label-count {
    color: var(--text-tertiary);
    font-size: 12px;
    padding: 2px 8px;
    background: var(--bg-primary);
    border-radius: 12px;
}

.tags-container {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.tag-badge {
    display: inline-block;
    padding: 6px 12px;
    background: var(--secondary-color);
    color: white;
    border-radius: 20px;
    font-size: 12px;
    cursor: pointer;
    transition: var(--transition-fast);
}

.tag-badge:hover {
    background: var(--secondary-dark);
    transform: scale(1.05);
}

/* ====================
   Note History
   ==================== */

.history-modal {
    width: 90%;
    max-width: 700px;
    max-height: 80vh;
}

.history-timeline {
    display: flex;
    flex-direction: column;
    gap: 20px;
    position: relative;
    padding-left: 40px;
}

.history-timeline::before {
    content: '';
    position: absolute;
    left: 10px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border-color-light);
}

.history-item {
    position: relative;
    padding: 15px;
    background: var(--bg-secondary);
    border-radius: 4px;
}

.history-dot {
    position: absolute;
    left: -48px;
    top: 18px;
    width: 18px;
    height: 18px;
    background: var(--secondary-color);
    border: 3px solid var(--bg-primary);
    border-radius: 50%;
}

.history-header {
    display: flex;
    justify-content: space-between;
    gap: 10px;
    margin-bottom: 10px;
}

.history-version {
    font-weight: 600;
    color: var(--secondary-color);
    font-size: 12px;
    text-transform: uppercase;
}

.history-date {
    color: var(--text-tertiary);
    font-size: 12px;
}

.history-title {
    margin: 5px 0;
    color: var(--text-primary);
    font-weight: 500;
}

.history-preview {
    margin: 8px 0 12px 0;
    color: var(--text-secondary);
    font-size: 13px;
    line-height: 1.5;
}

/* ====================
   Sharing & Collaboration
   ==================== */

.sharing-modal {
    width: 90%;
    max-width: 800px;
}

.sharing-section {
    margin-bottom: 30px;
    padding-bottom: 25px;
    border-bottom: 1px solid var(--border-color);
}

.sharing-section:last-child {
    border-bottom: none;
}

.sharing-section h3 {
    color: var(--text-primary);
    margin-bottom: 15px;
}

.share-link-group {
    display: flex;
    gap: 10px;
    margin-bottom: 15px;
}

.share-link-input {
    flex: 1;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-family: monospace;
    font-size: 12px;
}

.share-options {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.share-options .checkbox-label {
    font-size: 14px;
}

.collaborators-input {
    display: flex;
    gap: 10px;
    margin-bottom: 15px;
}

.collaborators-input input {
    flex: 1;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 14px;
}

.collaborators-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.collaborator-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background: var(--bg-secondary);
    border-radius: 4px;
}

.collaborator-avatar {
    width: 40px;
    height: 40px;
    background: var(--secondary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.collaborator-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.collaborator-email {
    font-weight: 500;
    color: var(--text-primary);
}

.collaborator-role {
    font-size: 12px;
    color: var(--text-tertiary);
    text-transform: uppercase;
}

.activity-log {
    display: flex;
    flex-direction: column;
    gap: 12px;
    max-height: 300px;
    overflow-y: auto;
}

.activity-item {
    display: flex;
    gap: 12px;
    padding: 10px;
    background: var(--bg-secondary);
    border-radius: 4px;
    align-items: flex-start;
}

.activity-icon {
    color: var(--secondary-color);
    font-size: 14px;
    flex-shrink: 0;
    margin-top: 2px;
}

.activity-details {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.activity-text {
    color: var(--text-primary);
    font-size: 13px;
}

.activity-time {
    color: var(--text-tertiary);
    font-size: 11px;
}

/* ====================
   Rich Text Editor Toolbar
   ==================== */

.editor-toolbar {
    display: none;
    flex-wrap: wrap;
    gap: 0;
    padding: 8px;
    background: var(--bg-secondary);
    border-radius: 4px;
    border: 1px solid var(--border-color);
    margin-bottom: 12px;
}

.toolbar-group {
    display: flex;
    gap: 0;
    border-right: 1px solid var(--border-color);
    padding-right: 8px;
    margin-right: 8px;
}

.toolbar-group:last-child {
    border-right: none;
    padding-right: 0;
    margin-right: 0;
}

.toolbar-btn {
    width: 36px;
    height: 36px;
    border: none;
    background: transparent;
    cursor: pointer;
    color: var(--text-primary);
    border-radius: 4px;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
}

.toolbar-btn:hover {
    background: var(--bg-tertiary);
}

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

/* ====================
   Voice Notes
   ==================== */

.voice-notes-modal {
    width: 90%;
    max-width: 600px;
}

.voice-recorder {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
    padding: 30px;
    background: var(--bg-secondary);
    border-radius: 8px;
    margin-bottom: 30px;
}

.record-btn {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: var(--danger-color);
    color: white;
    border: none;
    cursor: pointer;
    font-size: 32px;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
}

.record-btn:hover {
    transform: scale(1.05);
}

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

.recording-info {
    text-align: center;
    width: 100%;
}

.recording-timer {
    font-size: 28px;
    font-weight: bold;
    color: var(--text-primary);
    font-family: monospace;
    margin-bottom: 8px;
}

.recording-status {
    color: var(--text-secondary);
    font-size: 14px;
}

.voice-files-list {
    margin-top: 30px;
}

.voice-files-list h3 {
    color: var(--text-primary);
    margin-bottom: 15px;
}

.files-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.voice-note-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background: var(--bg-secondary);
    border-radius: 4px;
}

.voice-play-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--secondary-color);
    color: white;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
    flex-shrink: 0;
}

.voice-play-btn:hover {
    transform: scale(1.1);
}

.voice-note-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.voice-note-name {
    font-weight: 500;
    color: var(--text-primary);
}

.voice-note-duration {
    font-size: 12px;
    color: var(--text-tertiary);
}

/* ====================
   Notification Center
   ==================== */

.notification-center-modal {
    width: 90%;
    max-width: 700px;
}

.notification-filters {
    display: flex;
    gap: 8px;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 12px;
}

.notif-filter-btn {
    padding: 8px 16px;
    border: none;
    background: transparent;
    cursor: pointer;
    color: var(--text-secondary);
    transition: var(--transition-fast);
    border-bottom: 2px solid transparent;
    font-weight: 500;
}

.notif-filter-btn:hover {
    color: var(--text-primary);
}

.notif-filter-btn.active {
    color: var(--secondary-color);
    border-bottom-color: var(--secondary-color);
}

.notifications-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    max-height: 400px;
    overflow-y: auto;
}

.notification-item {
    padding: 15px;
    background: var(--bg-secondary);
    border-radius: 4px;
    border-left: 4px solid var(--secondary-color);
    transition: var(--transition-fast);
}

.notification-item.read {
    opacity: 0.7;
}

.notification-item:hover {
    transform: translateX(4px);
}

.notification-content {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.notification-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 10px;
}

.notification-title {
    font-weight: 600;
    color: var(--text-primary);
}

.notification-time {
    color: var(--text-tertiary);
    font-size: 12px;
}

.notification-body {
    margin: 0;
    color: var(--text-secondary);
    font-size: 13px;
    line-height: 1.5;
}

.notification-action {
    display: inline-block;
    margin-top: 8px;
    padding: 6px 12px;
    background: var(--secondary-color);
    color: white;
    text-decoration: none;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 500;
    transition: var(--transition-fast);
    width: fit-content;
}

.notification-action:hover {
    background: var(--secondary-dark);
}

/* ====================
   Responsive Adjustments
   ==================== */

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

    .label-input-group {
        flex-direction: column;
    }

    .color-picker-group {
        flex-wrap: wrap;
    }

    .history-timeline {
        padding-left: 20px;
    }

    .history-timeline::before {
        left: 0;
    }

    .history-dot {
        left: -28px;
    }

    .share-link-group {
        flex-direction: column;
    }

    .toolbar-group {
        border-right: none;
        border-bottom: 1px solid var(--border-color);
        padding-right: 0;
        padding-bottom: 8px;
        margin-right: 0;
        margin-bottom: 8px;
    }

    .editor-toolbar {
        flex-direction: column;
    }
}