:root {
    color-scheme: light;
    --bg: #f7f7f2;
    --bg-secondary: #ffffff;
    --surface: #ffffff;
    --surface-muted: #ededdf;
    --text: #171717;
    --text-primary: #171717;
    --text-secondary: #60646c;
    --accent: #0f766e;
    --accent-hover: #115e59;
    --accent-soft: rgba(15, 118, 110, 0.12);
    --border: #202020;
    --shadow-light: rgba(255, 255, 255, 0.8);
    --shadow-dark: rgba(23, 23, 23, 0.22);
    --node-bg: #fffdf5;
    --node-border: #202020;
    --node-text: #171717;
    --node-shadow: rgba(23, 23, 23, 0.18);
    --line: #334155;
    --link: #1d4ed8;
    --selection: #0f766e;
    --success: #16803c;
    --danger: #c02626;
    --info: #2563eb;
    --radius-sm: 6px;
    --radius: 8px;
    --radius-lg: 10px;
    --control-size: 2.5rem;
    --shadow-raised: 3px 3px 0 var(--shadow-dark);
    --shadow-raised-lg: 5px 5px 0 var(--shadow-dark);
    --transition: 120ms ease;
}

html.dark {
    color-scheme: dark;
    --bg: #111111;
    --bg-secondary: #1c1c1c;
    --surface: #232323;
    --surface-muted: #2e2e2e;
    --text: #f4f4f0;
    --text-primary: #f4f4f0;
    --text-secondary: #b7b7ad;
    --accent: #14b8a6;
    --accent-hover: #0d9488;
    --accent-soft: rgba(20, 184, 166, 0.18);
    --border: #e9e7dc;
    --shadow-light: rgba(255, 255, 255, 0.08);
    --shadow-dark: rgba(0, 0, 0, 0.5);
    --node-bg: #1f1f1f;
    --node-border: #e9e7dc;
    --node-text: #f4f4f0;
    --node-shadow: rgba(0, 0, 0, 0.45);
    --line: #cbd5e1;
    --link: #a78bfa;
    --selection: #a78bfa;
}

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

html,
body {
    width: 100%;
    height: 100%;
}

body {
    background: var(--bg);
    color: var(--text);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    overflow: hidden;
    text-rendering: geometricPrecision;
}

button,
input,
textarea {
    font: inherit;
}

button {
    color: inherit;
}

svg {
    width: 1.25rem;
    height: 1.25rem;
    display: block;
    flex-shrink: 0;
}

header {
    position: relative;
    min-height: 4.25rem;
    background: color-mix(in srgb, var(--bg-secondary) 92%, transparent);
    border-bottom: 2px solid var(--border);
    box-shadow: 0 2px 0 var(--shadow-dark);
    backdrop-filter: blur(14px);
}

main {
    min-height: 0;
    background: var(--bg);
}

#mindMapCanvas {
    display: block;
    width: 100%;
    height: 100%;
    cursor: default;
}

.header-left,
.header-right,
.toolbar-center {
    min-width: 0;
}

.header-left h1 {
    white-space: nowrap;
    color: var(--text-primary);
    letter-spacing: 0;
}

.header-left img {
    border-radius: var(--radius-sm);
    flex-shrink: 0;
}

.toolbar-center {
    background: var(--surface);
    border: 2px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-raised);
}

.btn {
    width: var(--control-size);
    height: var(--control-size);
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--surface);
    color: var(--text);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    box-shadow: 2px 2px 0 var(--shadow-dark);
    transition: transform var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition), opacity var(--transition);
}

.btn:hover:not(:disabled) {
    background: var(--surface-muted);
    transform: translate(1px, 1px);
    box-shadow: 1px 1px 0 var(--shadow-dark);
}

.btn:active:not(:disabled) {
    transform: translate(2px, 2px);
    box-shadow: none;
}

.btn:focus-visible,
button:not(.btn):focus-visible,
input:focus-visible,
textarea:focus-visible {
    outline: 3px solid var(--accent);
    outline-offset: 2px;
}

.btn:disabled {
    cursor: not-allowed;
    opacity: 0.45;
    transform: none;
}

.btn-primary {
    background: var(--accent);
    color: #ffffff;
}

.btn-primary:hover:not(:disabled) {
    background: var(--accent-hover);
}

.btn-secondary {
    background: var(--surface);
}

.btn.is-active {
    background: var(--accent);
    color: #ffffff;
}

.btn.is-active:hover:not(:disabled) {
    background: var(--accent-hover);
}

#zoomIndicator {
    min-width: 4rem;
    color: var(--text-secondary);
    font-variant-numeric: tabular-nums;
    line-height: var(--control-size);
}

#node-editor {
    background: var(--node-bg);
    color: var(--node-text);
    border: 2px solid var(--node-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-raised-lg);
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
    tab-size: 4;
    overflow: auto;
    white-space: pre-wrap;
    overflow-wrap: break-word;
    word-break: break-word;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease-in-out;
}

#node-editor.active {
    opacity: 1;
    pointer-events: auto;
}

#context-menu {
    background: var(--surface);
    border: 2px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-raised-lg);
    padding: 0.35rem;
    color: var(--text-primary);
}

#context-menu li {
    list-style: none;
    border-radius: var(--radius-sm);
    transition: background var(--transition), color var(--transition);
}

#context-menu li:hover {
    background: var(--accent);
    color: #ffffff;
}

#cloudModal {
    background: rgba(0, 0, 0, 0.56);
    padding: 1rem;
}

#cloudModal > div {
    width: min(24rem, calc(100vw - 2rem));
    background: var(--surface);
    border: 2px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-raised-lg);
}

label {
    color: var(--text-secondary);
}

input[type="text"] {
    min-width: 0;
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 0.65rem 0.75rem;
    outline: none;
    transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
}

input[type="text"]:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-soft);
}

input::placeholder {
    color: var(--text-secondary);
}

button:not(.btn) {
    min-height: var(--control-size);
    background: var(--surface);
    color: var(--text-primary);
    border: 2px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 0.6rem 1rem;
    cursor: pointer;
    box-shadow: 2px 2px 0 var(--shadow-dark);
    transition: transform var(--transition), box-shadow var(--transition), background var(--transition), color var(--transition);
}

button:not(.btn):hover {
    background: var(--surface-muted);
    transform: translate(1px, 1px);
    box-shadow: 1px 1px 0 var(--shadow-dark);
}

button:not(.btn):active {
    transform: translate(2px, 2px);
    box-shadow: none;
}

#modalConfirm {
    background: var(--accent);
    color: #ffffff;
}

#modalConfirm:hover {
    background: var(--accent-hover);
}

#notification {
    width: min(28rem, calc(100vw - 2rem));
    background: var(--surface);
    border: 2px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-raised-lg);
    color: var(--text-primary);
    pointer-events: none;
}

.mindmap-item {
    min-height: 2.75rem;
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    transition: background var(--transition), border-color var(--transition), color var(--transition);
}

.mindmap-item:hover {
    background: var(--surface-muted);
    border-color: color-mix(in srgb, var(--border) 40%, transparent);
}

.mindmap-item.selected {
    background: var(--accent) !important;
    color: #ffffff !important;
    border-color: var(--accent-hover) !important;
}

.mindmap-item.selected * {
    color: #ffffff !important;
}

.mindmap-item > div:first-child {
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

#mindmapsList {
    background: var(--bg-secondary);
    border: 2px solid var(--border);
    border-radius: var(--radius);
    overflow-y: auto;
}

#mindmapsList,
#node-editor {
    scrollbar-width: thin;
    scrollbar-color: var(--border) transparent;
}

#mindmapsList::-webkit-scrollbar,
#node-editor::-webkit-scrollbar {
    display: block;
    width: 8px;
    height: 8px;
}

#mindmapsList::-webkit-scrollbar-thumb,
#node-editor::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 999px;
}

#mindmapsList::-webkit-scrollbar-track,
#node-editor::-webkit-scrollbar-track {
    background: transparent;
}

.hidden { display: none !important; }
.block { display: block; }
.flex { display: flex; }
.flex-col { flex-direction: column; }
.flex-1 { flex: 1 1 0%; }
.items-center { align-items: center; }
.items-start { align-items: flex-start; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.justify-end { justify-content: flex-end; }
.gap-1 { gap: 0.25rem; }
.gap-2 { gap: 0.5rem; }
.relative { position: relative; }
.absolute { position: absolute; }
.fixed { position: fixed; }
.inset-0 { inset: 0; }
.left-1\/2 { left: 50%; }
.-translate-x-1\/2 { transform: translateX(-50%); }
.transform { transform: translateY(0); }
.translate-y-20 { transform: translateY(calc(100% + 2rem)); }
.translate-y-0 { transform: translateY(0); }
.z-10 { z-index: 10; }
.z-20 { z-index: 20; }
.z-30 { z-index: 30; }
.z-50 { z-index: 50; }
.h-screen { height: 100vh; }
.w-4 { width: 1rem; }
.h-4 { height: 1rem; }
.w-5 { width: 1.25rem; }
.h-5 { height: 1.25rem; }
.w-6 { width: 1.5rem; }
.h-6 { height: 1.5rem; }
.w-8 { width: 2rem; }
.h-8 { height: 2rem; }
.w-16 { width: 4rem; }
.w-48 { width: 12rem; }
.w-96 { width: 24rem; }
.w-full { width: 100%; }
.w-px { width: 1px; }
.h-6 { height: 1.5rem; }
.max-w-md { max-width: 28rem; }
.max-h-48 { max-height: 12rem; }
.mx-1 { margin-left: 0.25rem; margin-right: 0.25rem; }
.mx-4 { margin-left: 1rem; margin-right: 1rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-4 { margin-bottom: 1rem; }
.ml-2 { margin-left: 0.5rem; }
.mr-3 { margin-right: 0.75rem; }
.mt-0\.5 { margin-top: 0.125rem; }
.bottom-4 { bottom: 1rem; }
.right-4 { right: 1rem; }
.p-1 { padding: 0.25rem; }
.p-2 { padding: 0.5rem; }
.p-4 { padding: 1rem; }
.p-6 { padding: 1.5rem; }
.px-3 { padding-left: 0.75rem; padding-right: 0.75rem; }
.px-4 { padding-left: 1rem; padding-right: 1rem; }
.py-1 { padding-top: 0.25rem; padding-bottom: 0.25rem; }
.py-2 { padding-top: 0.5rem; padding-bottom: 0.5rem; }
.overflow-y-auto { overflow-y: auto; }
.resize-none { resize: none; }
.cursor-pointer { cursor: pointer; }
.text-left { text-align: left; }
.text-center { text-align: center; }
.text-xs { font-size: 0.75rem; line-height: 1rem; }
.text-sm { font-size: 0.875rem; line-height: 1.25rem; }
.text-lg { font-size: 1.125rem; line-height: 1.75rem; }
.text-2xl { font-size: 1.5rem; line-height: 2rem; }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.tracking-tight { letter-spacing: 0; }
.outline-none { outline: none; }
.focus\:outline-none:focus { outline: none; }
.focus\:ring-2:focus { box-shadow: 0 0 0 3px var(--accent-soft); }
.focus\:ring-\[var\(--accent\)\]:focus { border-color: var(--accent); }
.rounded { border-radius: var(--radius-sm); }
.rounded-lg { border-radius: var(--radius); }
.border { border: 2px solid var(--border); }
.border-b { border-bottom: 2px solid var(--border); }
.shadow-md { box-shadow: var(--shadow-raised); }
.shadow-lg { box-shadow: var(--shadow-raised-lg); }
.transition-colors { transition: background var(--transition), color var(--transition), border-color var(--transition); }
.transition-transform { transition: transform 300ms ease; }
.duration-300 { transition-duration: 300ms; }
.backdrop-blur-xl { backdrop-filter: blur(14px); }
.bg-black { background-color: #000000; }
.bg-opacity-50 { background-color: rgba(0, 0, 0, 0.5); }
.bg-\[var\(--bg\)\] { background: var(--bg); }
.bg-\[var\(--bg-secondary\)\] { background: var(--bg-secondary); }
.bg-\[var\(--bg-secondary\)\]\/80 { background: color-mix(in srgb, var(--bg-secondary) 80%, transparent); }
.bg-\[var\(--border\)\] { background: var(--border); }
.bg-\[var\(--accent\)\] { background: var(--accent); }
.bg-\[var\(--accent-hover\)\] { background: var(--accent-hover); }
.bg-\[var\(--node-bg\)\] { background: var(--node-bg); }
.border-\[var\(--border\)\] { border-color: var(--border); }
.border-\[var\(--node-border\)\] { border-color: var(--node-border); }
.text-\[var\(--text-primary\)\] { color: var(--text-primary); }
.text-\[var\(--text-secondary\)\] { color: var(--text-secondary); }
.text-\[var\(--node-text\)\] { color: var(--node-text); }
.text-white { color: #ffffff; }
.text-green-500 { color: var(--success); }
.text-red-500 { color: var(--danger); }
.text-red-700 { color: #991b1b; }
.text-blue-500 { color: var(--info); }
.hover\:bg-\[var\(--border\)\]:hover { background: var(--surface-muted); }
.hover\:bg-\[var\(--accent-hover\)\]:hover { background: var(--accent-hover); }
.hover\:text-red-700:hover { color: #991b1b; }

@media (max-width: 1200px) {
    header {
        min-height: auto;
        flex-wrap: wrap;
        gap: 0.75rem;
    }

    .toolbar-center {
        position: static;
        transform: none;
        width: 100%;
        justify-content: center;
        order: 3;
    }

    .header-left {
        order: 1;
    }

    .header-right {
        order: 2;
        margin-left: auto;
    }
}

@media (max-width: 900px) {
    header {
        padding: 0.5rem;
    }

    .toolbar-center {
        overflow-x: auto;
        justify-content: flex-start;
    }
}

@media (min-width: 640px) {
    .sm\:flex-row { flex-direction: row; }
    .sm\:items-center { align-items: center; }
    .sm\:mt-0 { margin-top: 0; }
    .sm\:\!w-auto { width: auto !important; }
}

@media (min-width: 768px) {
    .md\:p-4 { padding: 1rem; }
    .md\:w-8 { width: 2rem; }
    .md\:h-8 { height: 2rem; }
    .md\:w-5 { width: 1.25rem; }
    .md\:h-5 { height: 1.25rem; }
    .md\:mr-2 { margin-right: 0.5rem; }
    .md\:text-2xl { font-size: 1.5rem; line-height: 2rem; }
    .md\:inline { display: inline; }
}

/* Added missing utility classes for portal */
.grid { display: grid; }
.grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.gap-2 { gap: 0.5rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 0.75rem; }
.mt-4 { margin-top: 1rem; }
.pt-3 { padding-top: 0.75rem; }
.border-t { border-top-width: 1px; border-top-style: solid; border-top-color: var(--border); }