:root {
    --bg-color: #ffffff;
    --text-color: #1e293b;
    --node-bg: #f1f5f9;
    --node-border: transparent;
    --node-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --selected-bg: #e0f2fe;
    --selected-border: #3b82f6;
    --selected-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --connector-stroke: #94a3b8;
    --button-bg: #2563eb;
    --button-active-bg: #1d4ed8;
    --button-text: #ffffff;
    --button-disabled-bg: #94a3b8;
    --info-bg: rgba(241, 245, 249, 0.8);
    --info-border: #e2e8f0;
    --info-text: #334155;
    --collapse-btn-bg: #3b82f6;
    --collapse-btn-hover-bg: #2563eb;
    --panel-bg: #ffffff;
    --panel-width: 300px;
    --panel-border: #e2e8f0;
}

body {
    font-family: 'Vazirmatn', 'Tahoma', sans-serif;
    margin: 0;
    padding: 0;
    overflow: hidden;
    background-color: var(--bg-color);
    color: var(--text-color);
    user-select: none;
}

#mindmap-canvas {
    position: relative;
    width: 100vw;
    height: 100vh;
    overflow: hidden;
    cursor: grab;
}

#mindmap-canvas.panning {
    cursor: grabbing;
}

#mindmap-svg-layer,
#mindmap-nodes-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    transform-origin: 0 0; /* Critical for correct zoom & pan */
}

#mindmap-svg-layer {
    pointer-events: none;
    z-index: 0;
}

.connector-line {
    stroke: var(--connector-stroke);
    stroke-width: 2px;
    fill: none;
}

#mindmap-nodes-layer {
    position: relative;
    z-index: 1;
}

.mindmap-node {
    position: absolute;
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 20px;
    min-height: 10px;
    padding: 0.4rem 0.8rem;
    border: 2px solid var(--node-border);
    cursor: pointer;
    transition: border-color 0.2s ease-in-out, box-shadow 0.2s ease-in-out, transform 0.2s ease-in-out, background-color 0.2s;
    transform: translate(-50%, -50%);
}

.mindmap-node.node-style-rect {
    background-color: var(--node-bg);
    border-radius: 0.5rem;
    box-shadow: var(--node-shadow);
}

.mindmap-node.node-style-ellipse {
    background-color: var(--node-bg);
    border-radius: 999px; /* Pill shape */
    box-shadow: var(--node-shadow);
    padding: 0.3rem 1rem;
}

.mindmap-node.node-style-underline {
    background: transparent;
    border: none;
    box-shadow: none;
    border-bottom: 2px solid var(--connector-stroke);
    border-radius: 0.5rem 0.5rem 0 0; /* Add radius for selected state */
    padding-top: 0.6rem;
    padding-bottom: 0.4rem;
}

.mindmap-node.node-style-none {
    background: transparent;
    border: none;
    box-shadow: none;
    /* افزودن شعاع برای زیبایی پس‌زمینه در حالت انتخاب */
    border-radius: 0.5rem;
}


.mindmap-node:not(.node-style-underline):not(.node-style-none):hover {
    border-color: #93c5fd;
}

.mindmap-node.selected {
    transform: translate(-50%, -50%) scale(1.05);
}

/* استایل انتخاب برای گره‌های دارای پس‌زمینه */
.mindmap-node.selected.node-style-rect,
.mindmap-node.selected.node-style-ellipse,
.mindmap-node.selected.node-style-none,
.mindmap-node.selected.node-style-underline {
    background-color: var(--selected-bg);
}

/* استایل انتخاب برای گره‌های دارای حاشیه */
.mindmap-node.selected.node-style-rect,
.mindmap-node.selected.node-style-ellipse {
    border-color: var(--selected-border);
    box-shadow: var(--selected-shadow);
}

/* استایل انتخاب برای گره‌های خط‌دار */
.mindmap-node.selected.node-style-underline {
    border-bottom-color: var(--selected-border);
}

.mindmap-node .node-text {
    padding: 0 0.5rem;
    text-align: center;
    word-break: break-word;
}

.mindmap-node .node-text a {
    color: #1d4ed8;
    text-decoration: underline;
    text-decoration-color: #93c5fd;
    transition: color 0.2s, text-decoration-color 0.2s;
}

.mindmap-node .node-text a:hover {
    color: #1e40af;
    text-decoration-color: #3b82f6;
}

.mindmap-node .node-text code {
    background-color: #e2e8f0;
    border: 1px solid #cbd5e1;
    color: #334155;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.9em;
    font-family: monospace;
}

.mindmap-node .node-text del {
    opacity: 0.7;
}

.mindmap-node .node-input {
    background: transparent;
    border: none;
    text-align: center;
    font-family: inherit;
    font-size: inherit;
    color: inherit;
    outline: none;
    padding: 0 0.5rem;
    box-sizing: border-box;
    resize: none;
    overflow: hidden;
    line-height: inherit;
}

.collapse-btn {
    position: absolute;
    width: 0.75rem;
    height: 0.75rem;
    background-color: var(--collapse-btn-bg);
    color: white;
    border: 1px solid var(--bg-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    line-height: 1;
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.2s;
    z-index: 5;
    padding: 0;
    box-shadow: 0 1px 3px rgba(0,0,0,0.2);
}

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

#toolbar {
    position: absolute;
    top: 1rem;
    left: 1rem;
    z-index: 20;
    display: flex;
    gap: 0.25rem;
    align-items: center;
    background-color: var(--info-bg);
    padding: 0.4rem;
    border-radius: 0.5rem;
    backdrop-filter: blur(4px);
    box-shadow: 0 4px 6px -1px rgba(0,0,0,0.1);
    border: 1px solid var(--info-border);
}

.toolbar-group {
    display: flex;
    gap: 0.25rem;
}

#toolbar button {
    width: 40px;
    height: 40px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--info-bg);
    color: var(--info-text);
    border: 1px solid var(--info-border);
    border-radius: 50%;
    cursor: pointer;
    transition: background-color 0.2s, transform 0.1s ease, box-shadow 0.2s, border-color 0.2s, color 0.2s;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

#toolbar button:hover {
    background-color: #e2e8f0;
    border-color: #d1d5db;
}

#toolbar button:active {
    transform: scale(0.95);
}

#toolbar button.active {
    background-color: #e0f2fe;
    border-color: var(--selected-border);
    color: var(--selected-border);
    box-shadow: none;
}

#toolbar button:disabled {
    background-color: var(--info-bg);
    color: #cbd5e1;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
    opacity: 0.7;
}

#toolbar button svg {
    width: 20px;
    height: 20px;
    stroke: currentColor;
}

.toolbar-separator {
    width: 1px;
    height: 24px;
    background-color: var(--info-border);
    margin: 0 4px;
}

#instructions {
    position: absolute;
    bottom: 1rem;
    left: 1rem;
    z-index: 20;
    padding: 0.75rem;
    background-color: var(--info-bg);
    border-radius: 0.5rem;
    backdrop-filter: blur(4px);
    box-shadow: 0 4px 6px -1px rgba(0,0,0,0.1);
    border: 1px solid var(--info-border);
    font-size: 0.875rem;
    color: var(--info-text);
    transition: opacity 0.3s ease, transform 0.3s ease;
}

#instructions.closed {
    opacity: 0;
    transform: translateY(20px);
    pointer-events: none;
}

#close-instructions-btn {
    position: absolute;
    top: 0.25rem;
    left: 0.25rem;
    background: none;
    border: none;
    font-size: 1.5rem;
    line-height: 1;
    cursor: pointer;
    color: var(--info-text);
    padding: 0.25rem;
    opacity: 0.7;
}

#close-instructions-btn:hover {
    opacity: 1;
}

#instructions p { margin: 0; }
#instructions ul { margin: 0.25rem 0 0; padding-right: 1.25rem; list-style-type: none; }
#instructions li { margin-bottom: 0.25rem; }
#instructions code {
    background-color: #e2e8f0;
    border: 1px solid #cbd5e1;
    color: #334155;
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.8em;
    font-weight: 600;
}

#instructions-footer {
    border-top: 1px solid var(--info-border);
    margin-top: 0.75rem;
    padding-top: 0.75rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.9rem;
    font-weight: 600;
    color: #334155;
}

#instructions-footer .info-line {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

#instructions-footer a {
    color: var(--info-text);
    transition: color 0.2s;
}

#instructions-footer a:hover {
    color: var(--text-color);
}

#instructions-footer svg {
    width: 24px;
    height: 24px;
    fill: currentColor;
}


#show-instructions-btn {
    position: absolute;
    bottom: 1rem;
    left: 1rem;
    z-index: 19;
    width: 40px;
    height: 40px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--info-bg);
    color: var(--info-text);
    border: 1px solid var(--info-border);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 4px 6px -1px rgba(0,0,0,0.1);
    backdrop-filter: blur(4px);
    transition: opacity 0.3s ease, transform 0.3s ease;
    opacity: 0;
    transform: translateY(20px);
    pointer-events: none;
}

#show-instructions-btn.visible {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

#show-instructions-btn:hover {
    background-color: #e2e8f0;
}

#show-instructions-btn svg {
    width: 20px;
    height: 20px;
}


/* Side Panel Styles */
#panel-toggle-btn {
    position: absolute;
    top: 1rem;
    right: 100%;
    z-index: 30;
    width: 2.5rem;
    height: 2.5rem;
    font-size: 1.5rem;
    border-radius: 0.5rem 0 0 0.5rem;
    border: 1px solid var(--info-border);
    border-right: none;
    background-color: var(--info-bg);
    color: var(--info-text);
    cursor: pointer;
    box-shadow: -2px 1px 4px rgba(0,0,0,0.08);
    transition: background-color 0.2s ease;
}
#panel-toggle-btn:hover {
    background-color: #e2e8f0;
}

#side-panel {
    position: absolute;
    top: 0;
    right: calc(-1 * var(--panel-width));
    width: var(--panel-width);
    height: 100vh;
    background-color: var(--panel-bg);
    border-right: 1px solid var(--panel-border);
    box-shadow: -2px 0 8px rgba(0,0,0,0.1);
    transition: right 0.3s ease;
    z-index: 25;
    display: flex;
    flex-direction: column;
}

#side-panel.open {
    right: 0;
}

#side-panel .panel-header {
    padding: 0;
    border-bottom: 1px solid var(--panel-border);
    flex-shrink: 0;
}

.panel-tabs {
    display: flex;
}

.panel-tabs button {
    flex: 1;
    padding: 0.75rem;
    background: none;
    border: none;
    font-family: inherit;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    color: #64748b;
    border-bottom: 2px solid transparent;
    transition: color 0.2s, border-color 0.2s;
}

.panel-tabs button:hover {
    color: var(--text-color);
}

.panel-tabs button.active {
    color: var(--button-bg);
    border-bottom-color: var(--button-bg);
}

.panel-content {
    display: none;
    flex-grow: 1;
    overflow: hidden;
    flex-direction: column;
}

.panel-content.active {
    display: flex;
}

#saved-maps-list {
    list-style: none;
    padding: 0;
    margin: 0;
    overflow-y: auto;
    flex-grow: 1;
}

#saved-maps-list li {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--panel-border);
    transition: background-color 0.2s;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative; /* Needed for menu positioning */
}
#saved-maps-list li:hover {
    background-color: #f8fafc;
}

#saved-maps-list li.active {
    background-color: #e0f2fe;
    border-right: 4px solid var(--selected-border);
    padding-right: calc(1rem - 4px);
}

#saved-maps-list .map-info {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    cursor: pointer;
    flex-grow: 1;
    padding-left: 1rem; /* Space for menu button */
}

#saved-maps-list .map-name {
    font-weight: 600;
}

.map-menu-container {
    position: relative;
    flex-shrink: 0;
}

.menu-toggle-btn {
    background: transparent;
    border: none;
    font-size: 1.5rem;
    line-height: 1;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: 50%;
    color: #64748b;
}

.menu-toggle-btn:hover {
    background-color: #f1f5f9;
}

.map-item-menu {
    position: absolute;
    left: 0;
    top: 100%;
    background-color: var(--panel-bg);
    border: 1px solid var(--panel-border);
    border-radius: 0.5rem;
    box-shadow: var(--node-shadow);
    z-index: 10;
    width: 160px;
    padding: 0.5rem 0;
    display: none; /* Toggled with 'open' class */
}

.map-item-menu.open {
    display: block;
}

.map-item-menu button {
    display: block;
    width: 100%;
    padding: 0.5rem 1rem;
    text-align: right;
    background: none;
    border: none;
    font-family: inherit;
    font-size: 0.9rem;
    cursor: pointer;
}

.map-item-menu button:hover {
    background-color: #f8fafc;
}

#editor-content {
    padding: 0;
}

#markdown-editor {
    flex-grow: 1;
    width: 100%;
    height: 100%;
    border: none;
    padding: 1rem;
    font-family: 'Vazirmatn', monospace;
    font-size: 0.95rem;
    line-height: 1.6;
    resize: none;
    background-color: #f8fafc;
    color: var(--text-color);
    outline: none;
    box-sizing: border-box;
    direction: rtl;
    text-align: right;
}


/* Modal Styles */
#modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    backdrop-filter: blur(4px);
}

#modal-container {
    background-color: var(--bg-color);
    border-radius: 0.75rem;
    box-shadow: var(--selected-shadow);
    width: 90%;
    max-width: 450px;
    z-index: 101;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

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

.modal-header h2 {
    margin: 0;
    font-size: 1.2rem;
}

#modal-close-btn {
    background: none;
    border: none;
    font-size: 2rem;
    line-height: 1;
    cursor: pointer;
    color: #64748b;
    padding: 0;
}
#modal-close-btn:hover {
    color: var(--text-color);
}

.modal-body {
    padding: 1.5rem;
    line-height: 1.6;
}
.modal-body p {
    margin: 0 0 1rem;
}
.modal-body p:last-child {
    margin-bottom: 0;
}
.modal-body strong {
    color: #475569;
}
.modal-body span {
    color: var(--text-color);
}

.modal-body .modal-input {
    width: 100%;
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--panel-border);
    border-radius: 0.5rem;
    font-family: inherit;
    font-size: 1rem;
    box-sizing: border-box;
    margin-top: 0.5rem;
}

.modal-body .modal-input:focus {
    outline: none;
    border-color: var(--selected-border);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

.modal-footer {
    padding: 1rem 1.5rem;
    display: flex;
    justify-content: flex-start;
    gap: 0.75rem;
    background-color: #f8fafc;
    border-top: 1px solid var(--panel-border);
}

.modal-btn {
    padding: 0.5rem 1.25rem;
    border: 1px solid var(--panel-border);
    border-radius: 0.5rem;
    font-family: inherit;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.modal-btn.primary {
    background-color: var(--button-bg);
    color: var(--button-text);
    border-color: var(--button-bg);
}
.modal-btn.primary:hover {
    background-color: var(--button-active-bg);
    border-color: var(--button-active-bg);
}

.modal-btn.danger {
    background-color: #ef4444;
    color: white;
    border-color: #ef4444;
}
.modal-btn.danger:hover {
    background-color: #dc2626;
    border-color: #dc2626;
}

.modal-btn.default {
    background-color: white;
    color: var(--text-color);
}
.modal-btn.default:hover {
    background-color: #f1f5f9;
}

/* Emoji Picker */
#emoji-picker-container {
    position: fixed; /* Use fixed positioning to be relative to viewport */
    z-index: 30;
    box-shadow: 0 8px 16px rgba(0,0,0,0.15);
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--info-border);
}

emoji-picker {
    --indicator-color: var(--button-bg);
    --border-color: var(--info-border);
    --font-size: 0.9rem;
    --input-font-size: 1rem;
}

/* Color Picker */
.color-picker-group {
    position: relative;
}

.color-options-popup {
    display: none;
    position: absolute;
    top: 110%;
    right: 0;
    background-color: var(--bg-color);
    border-radius: 0.5rem;
    box-shadow: var(--selected-shadow);
    z-index: 30;
    width: max-content;
    border: 1px solid var(--info-border);
    padding: 0.5rem;
    gap: 0.5rem;
}

.color-options-popup.open {
    display: flex;
}

.color-options-popup button {
    padding: 0.5rem 0.8rem;
    text-align: center;
    background: white;
    border: 1px solid var(--info-border);
    border-radius: 0.375rem;
    font-family: inherit;
    font-size: 0.9rem;
    cursor: pointer;
    color: var(--text-color);
    white-space: nowrap;
    transition: background-color 0.2s, border-color 0.2s;
}

.color-options-popup button:hover {
    background-color: #f1f5f9;
    border-color: #d1d5db;
}