:root {
    --bg-color: #fff;
    --text-color: #333;
    --border-color: #ddd;
    --panel-bg: #f9f9f9;
    --button-bg: #f0f0f0;
    --button-hover: #e0e0e0;
    --accent-color: #4a90e2;
}

.dark-mode {
    --bg-color: #222;
    --text-color: #eee;
    --border-color: #444;
    --panel-bg: #333;
    --button-bg: #444;
    --button-hover: #555;
    --accent-color: #5a9cf0;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: background-color 0.3s, color 0.3s;
    margin: 0;
    padding: 0;
}

.app-container {
    display: flex;
    width: 100vw;
    height: 100vh;
    border: none;
    border-radius: 0;
}

.sidebar {
    width: 280px;
    border-right: 1px solid var(--border-color);
    background-color: var(--panel-bg);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    height: 100vh;
}

.main-content {
    flex: 1;
    padding: 20px;
    overflow-y: auto;
    background-color: var(--bg-color);
    height: 100vh;
}

.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px;
    border-bottom: 1px solid var(--border-color);
}

.app-title {
    font-size: 24px;
    font-weight: bold;
}

.toggle-theme {
    background: var(--button-bg);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    cursor: pointer;
    font-size: 20px;
    width: 40px;
    height: 40px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.toggle-theme:hover {
    background-color: var(--button-hover);
    transform: translateY(-1px);
    border-color: var(--border-color);
}

.add-btn {
    display: flex;
    align-items: center;
    background-color: var(--button-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 8px 15px;
    margin: 15px;
    cursor: pointer;
    color: var(--text-color);
    justify-content: space-between;
    font-size: 14px;
    transition: all 0.2s ease;
}

.add-btn:hover {
    background-color: var(--button-hover);
    transform: translateY(-1px);
    border-color: var(--border-color);
}

.add-btn i {
    margin-left: 5px;
}

.folder-list {
    flex: 1;
    overflow-y: auto;
    padding: 0 15px;
    height: calc(100vh - 160px);
    scrollbar-width: thin;
    scrollbar-color: var(--border-color) transparent;
}

.folder-list::-webkit-scrollbar {
    width: 8px;
}

.folder-list::-webkit-scrollbar-track {
    background: transparent;
}

.folder-list::-webkit-scrollbar-thumb {
    background-color: var(--border-color);
    border-radius: 4px;
}

.folder-item {
    margin: 10px 0;
    border-radius: 10px;
    overflow: hidden;
}

.folder-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px;
    background-color: var(--button-bg);
    cursor: pointer;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    transition: all 0.2s ease;
}

.folder-header:hover {
    background-color: var(--button-hover);
    transform: translateY(-1px);
    border-color: var(--border-color);
}

.folder-name {
    font-weight: bold;
}

.folder-arrow {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
}

.folder-arrow svg {
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.folder-arrow.expanded svg {
    transform: rotate(0deg);
}

.folder-header:hover .folder-arrow svg {
    transform: rotate(-80deg);
}

.folder-header:hover .folder-arrow.expanded svg {
    transform: rotate(10deg);
}

.note-list {
    display: none;
    padding: 5px 0;
}

.note-list.expanded {
    display: block;
}

.note-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 10px;
    margin: 5px 0;
    border-radius: 8px;
    background-color: var(--button-bg);
    border: 1px solid var(--border-color);
    cursor: pointer;
    transition: all 0.2s ease;
}

.note-item:hover {
    background-color: var(--button-hover);
    transform: translateY(-1px);
    border-color: var(--border-color);
}

.note-item.active {
    background-color: var(--accent-color);
    color: white;
}

.note-actions {
    display: flex;
    gap: 5px;
}

.delete-note {
    background: none;
    border: none;
    color: var(--text-color);
    cursor: pointer;
    opacity: 0.5;
    font-size: 14px;
}

.delete-note:hover {
    opacity: 1;
    color: #ff4444;
}

.delete-note:hover svg {
    color: #ff4444;
}

.create-note {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 10px;
    margin: 5px 0;
    border-radius: 8px;
    background-color: var(--button-bg);
    border: 1px solid var(--border-color);
    cursor: pointer;
    transition: all 0.2s ease;
}

.create-note:hover {
    background-color: var(--button-hover);
    transform: translateY(-1px);
    border-color: var(--border-color);
}

.create-note-icon {
    color: var(--text-color);
}

.note-type-selector {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 6px 12px;
    height: 32px;
    background-color: var(--button-bg);
    color: var(--text-color);
    cursor: pointer;
    transition: background-color 0.2s ease, transform 0.2s ease;
}

.note-type-wrapper {
    display: flex;
    align-items: center;
    gap: 8px;
    position: relative;
    height: 32px;
}

.note-type-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 5px;
    padding: 5px 0;
    min-width: 120px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
    display: none;
    z-index: 100;
    transform-origin: top center;
    margin-top: 5px;
}

.editor-container {
    height: 100%;
    display: flex;
    flex-direction: column;
}

.editor-header {
    margin-bottom: 20px;
}

.editor-header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    border-bottom: 1px solid var(--border-color);
}

.editor-header input {
    font-size: 28px;
    background: none;
    border: none;
    width: 100%;
    color: var(--text-color);
    padding: 10px 0;
    border-bottom: none;
    outline: none;
    font-weight: 300;
    flex: 1;
}

.word-count {
    font-size: 14px;
    color: #888;
    padding: 10px 0 10px 20px;
    white-space: nowrap;
}

.editor-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.editor-content div {
    font-size: 16px;
    color: var(--text-color);
}

.editor-content [contenteditable] {
    outline: none;
    min-height: 100px;
}

.placeholder {
    color: #998;
}

.action-buttons {
    position: absolute;
    display: none;
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 5px;
    padding: 5px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    transform-origin: top center;
    animation: dropDown 0.3s ease forwards;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.action-buttons button {
    background: none;
    border: none;
    padding: 5px 10px;
    cursor: pointer;
    display: block;
    width: 100%;
    text-align: left;
    color: var(--text-color);
    transition: all 0.2s ease;
    position: relative;
    overflow: hidden;
}

.action-buttons button:hover {
    background-color: var(--button-hover);
    padding-left: 20px;
}

.action-buttons button::before {
    content: '→';
    position: absolute;
    left: -20px;
    opacity: 0;
    transition: all 0.2s ease;
}

.action-buttons button:hover::before {
    left: 5px;
    opacity: 1;
}

@keyframes dropDown {
    from {
        opacity: 0;
        transform: translateY(-10px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

[contenteditable][data-placeholder]:empty:before {
    content: attr(data-placeholder);
    color: #999;
    font-style: italic;
}

[contenteditable][data-placeholder]:empty:focus:before {
    content: attr(data-placeholder);
}

.note-type-dropdown.dropdown-active {
    display: block;
    animation: dropDown 0.3s ease forwards;
}

.note-type-dropdown div {
    padding: 8px 15px;
    cursor: pointer;
    transition: all 0.2s ease;
    position: relative;
    overflow: hidden;
}

.note-type-dropdown div:hover {
    background-color: var(--button-hover);
    padding-left: 25px;
}

.note-type-dropdown div::before {
    content: '→';
    position: absolute;
    left: -20px;
    opacity: 0;
    transition: all 0.2s ease;
}

.note-type-dropdown div:hover::before {
    left: 10px;
    opacity: 1;
}

.icon {
    width: 20px;
    height: 20px;
    display: inline-block;
}

.icon svg {
    width: 100%;
    height: 100%;
}

.toggle-theme .icon {
    width: 24px;
    height: 24px;
}

.delete-note .icon,
.delete-folder .icon {
    width: 16px;
    height: 16px;
    transition: transform 0.3s ease;
}

.delete-note:hover .icon,
.delete-folder:hover .icon {
    transform: scale(1.2) rotate(15deg);
}

@media (max-width: 768px) {
    .app-container {
        flex-direction: column;
        height: 90vh;
    }

    .sidebar {
        width: 100%;
        height: 300px;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }

    .main-content {
        height: calc(100% - 300px);
    }

    .folder-list {
        height: calc(300px - 160px);
    }
}

.formatting-toolbar {
    position: fixed;
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 6px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
    display: none;
    z-index: 1000;
    user-select: none;
    white-space: nowrap;
    pointer-events: auto;
    transition: transform 0.1s ease;
    transform: translateY(10px);
}

.formatting-toolbar button {
    background: none;
    border: none;
    padding: 4px 8px;  /* Increase padding */
    margin: 0 2px;     /* Increase margin */
    height: 28px;      /* Set explicit height */
    min-width: 28px;   /* Set minimum width */
    cursor: pointer;
    color: var(--text-color);
    border-radius: 4px;
    transition: all 0.2s ease;
    position: relative;
}

.formatting-toolbar button:hover {
    background-color: var(--button-hover);
}

.formatting-toolbar button.active {
    background-color: var(--accent-color);
    color: white;
}

.formatting-toolbar .separator {
    width: 1px;
    height: 20px;  /* Increase height */
    background-color: var(--border-color);
    margin: 0 3px;
    display: inline-block;
    vertical-align: middle;
}

.formatting-toolbar .font-size-selector {
    background-color: var(--button-bg);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 2px 4px;
    border-radius: 4px;
    margin: 0 2px;
    cursor: pointer;
    height: 28px;  /* Match button height */
    min-width: 80px; /* Add minimum width */
    outline: none;
    -webkit-appearance: menulist; /* For Safari/Chrome */
    -moz-appearance: menulist; /* For Firefox */
    appearance: menulist; /* Standard */
}

.toolbar-icon {
    width: 16px;
    height: 16px;
    display: inline-block;
    vertical-align: middle;
}

.folder-actions {
    display: flex;
    align-items: center;
    gap: 8px;
}

.delete-folder {
    background: none;
    border: none;
    color: var(--text-color);
    cursor: pointer;
    opacity: 0.5;
    padding: 2px;
}

.delete-folder:hover {
    opacity: 1;
    color: #ff4444;
}

.delete-folder .icon {
    width: 16px;
    height: 16px;
}

.folder-header:hover .delete-folder {
    opacity: 0.8;
}

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(5px);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    animation: fadeIn 0.2s ease;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s ease, visibility 0.2s ease;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal-container {
    background-color: var(--bg-color);
    border-radius: 12px;
    padding: 24px;
    width: 320px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.12);
    transform-origin: center;
    animation: modalSlideUp 0.3s ease;
    opacity: 0;
    transform: translateY(20px) scale(0.95);
    transition: all 0.3s ease;
}

.modal-overlay.active .modal-container {
    opacity: 1;
    transform: translateY(0) scale(1);
}

.modal-overlay.closing {
    opacity: 0;
}

.modal-overlay.closing .modal-container {
    transform: translateY(20px) scale(0.95);
    opacity: 0;
}

.modal-title {
    font-size: 18px;
    font-weight: 500;
    margin-bottom: 16px;
    color: var(--text-color);
}

.modal-input {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 14px;
    margin-bottom: 20px;
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: border-color 0.2s ease;
}

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

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
}

.modal-btn {
    padding: 8px 16px;
    border-radius: 6px;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
}

.modal-btn-cancel {
    background-color: var(--button-bg);
    color: var(--text-color);
}

.modal-btn-confirm {
    background-color: var(--accent-color);
    color: white;
}

.modal-btn:hover {
    transform: translateY(-1px);
}

.modal-btn-cancel:hover {
    background-color: var(--button-hover);
}

.modal-btn-confirm:hover {
    filter: brightness(1.1);
}

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

@keyframes modalSlideUp {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.calendar-btn {
    background: var(--button-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    width: 32px;
    height: 32px;
    padding: 6px;
    color: var(--text-color);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s ease, transform 0.2s ease;
    flex-shrink: 0;
}

.calendar-btn:hover {
    background: var(--button-hover);
    transform: translateY(-1px);
}

.calendar-popup {
    position: fixed;
    background: var(--bg-color);
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
    padding: 16px;
    opacity: 0;
    visibility: hidden;
    z-index: 1000;
    border: 1px solid var(--border-color);
    transition: opacity 0.3s ease, visibility 0.3s ease, transform 0.3s ease;
    transform: translateY(-10px);
}

.calendar-popup.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.calendar-popup.hide {
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
}

.calendar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.calendar-title {
    font-size: 16px;
    font-weight: 500;
}

.calendar-nav {
    display: flex;
    gap: 10px;
}

.calendar-nav button {
    background: none;
    border: none;
    color: var(--text-color);
    cursor: pointer;
    padding: 5px;
    border-radius: 50%;
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.calendar-nav button:hover {
    background: var(--button-hover);
}

.calendar-grid {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 8px;
}

.calendar-day {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    cursor: pointer;
    font-size: 14px;
}

.calendar-day:hover {
    background: var(--button-hover);
}

.calendar-day.today {
    background: var(--accent-color);
    color: white;
}

.calendar-day.selected {
    background: var(--accent-color);
    color: white;
}

.calendar-weekday {
    font-size: 12px;
    color: #888;
    text-align: center;
    padding: 5px 0;
    font-weight: 500;
}

@keyframes calendarSlide {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Improve typing smoothness */
[contenteditable="true"] {
    transition: background-color 0.2s ease;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
    cursor: text;
}

[contenteditable="true"]:focus {
    outline: none;
    background-color: var(--bg-color);
}