/* =====================================================================
   G-Nodes — ورقة الأنماط الرئيسية (الإصدار 2)
   Dark Premium · Fluid & Responsive · Touch-friendly
   ===================================================================== */

/* ---------- 1) متغيرات التصميم ---------- */
:root {
    --bg-0: #0b0f16;
    --bg-1: #10161f;
    --bg-2: #171f2b;
    --bg-3: #1f2937;
    --bg-4: #26303f;
    --border: #2b3648;
    --border-soft: #212b3a;

    --text-1: #eaf1f8;
    --text-2: #9aa7b8;
    --text-3: #64718a;

    --accent: #4f9dff;
    --accent-2: #7c5cff;
    --accent-glow: rgba(79, 157, 255, 0.35);
    --danger: #ff5c6c;
    --success: #3fb950;
    --warn: #f0a020;

    --grid-line: rgba(255, 255, 255, 0.035);
    --grid-line-strong: rgba(255, 255, 255, 0.06);

    /* ألوان فئات العُقد */
    --cat-io:     #3fb0ff;
    --cat-var:    #a371f7;
    --cat-logic:  #f0a020;
    --cat-loop:   #ff7ac6;
    --cat-lib:    #3fb950;
    --cat-custom: #f97316;

    --radius: 11px;
    --radius-sm: 7px;
    --shadow: 0 10px 34px rgba(0, 0, 0, 0.5);
    --shadow-soft: 0 4px 16px rgba(0, 0, 0, 0.3);

    --topbar-h: 58px;
    --sidebar-w: 268px;
    --datapanel-w: 380px;

    --font: "Cairo", system-ui, sans-serif;
    --mono: "JetBrains Mono", "Courier New", monospace;
}

* { margin: 0; padding: 0; box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

html, body {
    height: 100%;
    overflow: hidden;
    font-family: var(--font);
    background: var(--bg-0);
    color: var(--text-1);
    -webkit-font-smoothing: antialiased;
    touch-action: none;      /* نتحكّم في اللمس يدوياً */
}
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }

/* ---------- 2) الشريط العلوي ---------- */
.topbar {
    height: var(--topbar-h);
    display: flex; align-items: center; justify-content: space-between;
    padding: 0 clamp(10px, 2vw, 18px);
    background: linear-gradient(180deg, var(--bg-2), var(--bg-1));
    border-bottom: 1px solid var(--border);
    position: relative; z-index: 40;
}
.topbar__brand { display: flex; align-items: center; gap: 11px; }
.topbar__menu { display: none; }
.topbar__logo {
    width: 38px; height: 38px; display: grid; place-items: center;
    border-radius: 10px; color: #fff; font-size: 18px;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    box-shadow: 0 4px 14px var(--accent-glow);
}
.topbar__title h1 { font-size: clamp(15px, 2.4vw, 18px); font-weight: 800; letter-spacing: .3px; }
.topbar__title small { font-size: 11px; color: var(--text-3); }
.topbar__actions { display: flex; gap: 7px; }

/* اسم المشروع الحالي في الشريط العلوي */
.topbar__project {
    display: inline-flex; align-items: center; gap: 8px;
    margin-inline: auto; padding: 6px 12px;
    background: var(--bg-2); border: 1px solid var(--border-soft);
    border-radius: 999px; max-width: 34vw; overflow: hidden;
}
.topbar__project > i { color: var(--text-3); font-size: 13px; }
.topbar__project-name {
    font-size: 12.5px; font-weight: 700; color: var(--text-1);
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 24vw;
}
.topbar__dirty {
    width: 8px; height: 8px; border-radius: 50%;
    background: var(--warn); box-shadow: 0 0 0 3px color-mix(in srgb, var(--warn) 25%, transparent);
    flex-shrink: 0;
}

.btn {
    display: inline-flex; align-items: center; gap: 7px;
    padding: 8px 13px; background: var(--bg-3);
    border: 1px solid var(--border); border-radius: var(--radius-sm);
    color: var(--text-1); font-size: 13px; font-weight: 600;
    transition: all .15s ease; white-space: nowrap;
}
.btn:hover { background: var(--bg-4); border-color: #3a4a63; transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn i { font-size: 13px; color: var(--text-2); }
.btn--accent { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn--accent:hover { background: #3d8bef; }
.btn--accent i { color: #fff; }
.btn--small { padding: 7px 9px; }
.btn--icon { padding: 8px 10px; }
.btn.is-active { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn.is-active i { color: #fff; }

/* ---------- 3) التخطيط ---------- */
.app { display: flex; height: calc(100dvh - var(--topbar-h)); overflow: hidden; }

/* ---------- 4) الشريط الجانبي ---------- */
.sidebar {
    width: var(--sidebar-w); flex-shrink: 0;
    background: var(--bg-1); border-inline-end: 1px solid var(--border);
    display: flex; flex-direction: column; z-index: 30;
    transition: transform .25s ease;
}
.sidebar__header {
    display: flex; align-items: center; gap: 10px;
    padding: 16px 18px 8px; font-size: 14px; font-weight: 700;
}
.sidebar__header i { color: var(--accent); }
.sidebar__close { display: none; margin-inline-start: auto; color: var(--text-3); font-size: 16px; }
.sidebar__hint { padding: 0 18px 10px; font-size: 12px; color: var(--text-3); line-height: 1.6; }

.palette { flex: 1; overflow-y: auto; padding: 4px 12px 14px; display: flex; flex-direction: column; gap: 6px; }

/* مجموعة فئة */
.palette-group__title {
    display: flex; align-items: center; gap: 8px;
    font-size: 11px; font-weight: 700; color: var(--text-3);
    text-transform: uppercase; letter-spacing: .5px;
    padding: 12px 6px 4px;
}
.palette-group__title i { color: var(--group-color, var(--accent)); }

.palette-item {
    display: flex; align-items: center; gap: 10px;
    padding: 9px 11px; background: var(--bg-2);
    border: 1px solid var(--border);
    border-inline-start: 3px solid var(--type-color, var(--accent));
    border-radius: var(--radius-sm); cursor: grab;
    transition: all .15s ease; user-select: none;
}
.palette-item:hover { background: var(--bg-3); transform: translateX(-3px); box-shadow: var(--shadow-soft); }
.palette-item:active { cursor: grabbing; }
.palette-item.is-dragging-ghost { opacity: .5; }
.palette-item__icon {
    width: 30px; height: 30px; flex-shrink: 0; display: grid; place-items: center;
    border-radius: 8px; font-size: 13px;
    background: color-mix(in srgb, var(--type-color) 18%, transparent);
    color: var(--type-color);
}
.palette-item__text strong { display: block; font-size: 12.5px; font-weight: 600; }
.palette-item__text span { font-size: 10.5px; color: var(--text-3); font-family: var(--mono); }

.sidebar__footer {
    padding: 11px 16px; border-top: 1px solid var(--border-soft);
    font-size: 11px; color: var(--text-3);
    display: flex; align-items: center; gap: 8px; line-height: 1.5;
}
.sidebar__footer i { color: var(--warn); }

/* ---------- 5) لوحة العمل ---------- */
.canvas-wrap {
    position: relative; flex: 1; overflow: hidden;
    background: var(--bg-1); cursor: grab; touch-action: none;
}
.canvas-wrap.is-panning { cursor: grabbing; }
.canvas-wrap.is-linking { cursor: crosshair; }

.grid-bg {
    position: absolute; inset: 0; background-color: var(--bg-1);
    background-image:
        linear-gradient(var(--grid-line) 1px, transparent 1px),
        linear-gradient(90deg, var(--grid-line) 1px, transparent 1px),
        linear-gradient(var(--grid-line-strong) 1px, transparent 1px),
        linear-gradient(90deg, var(--grid-line-strong) 1px, transparent 1px);
    background-size: 20px 20px, 20px 20px, 100px 100px, 100px 100px;
    pointer-events: none;
}
.world { position: absolute; top: 0; left: 0; transform-origin: 0 0; will-change: transform; width: 1px; height: 1px; }
.wires { position: absolute; overflow: visible; top: 0; left: 0; width: 1px; height: 1px; pointer-events: none; }

.wire-path {
    fill: none; stroke: var(--wire-color, var(--accent)); stroke-width: 2.5;
    pointer-events: stroke; transition: stroke-width .12s ease, opacity .12s ease;
    filter: drop-shadow(0 1px 2px rgba(0,0,0,.4));
}
.wire-path.is-hover { stroke-width: 4; cursor: pointer; }
.wire-path.is-temp { stroke-dasharray: 6 5; opacity: .9; pointer-events: none; }
.wire-hit { fill: none; stroke: transparent; stroke-width: 18; pointer-events: stroke; cursor: pointer; }

.nodes-layer { position: absolute; top: 0; left: 0; }

/* ---------- 6) العُقدة ---------- */
.node {
    position: absolute; min-width: 200px; max-width: 260px;
    background: var(--bg-2); border: 1px solid var(--border);
    border-radius: var(--radius); box-shadow: var(--shadow);
    user-select: none; transition: box-shadow .15s ease, border-color .15s ease;
}
.node.is-selected { border-color: var(--type-color); box-shadow: 0 0 0 2px color-mix(in srgb, var(--type-color) 40%, transparent), var(--shadow); }
.node.is-dragging { cursor: grabbing; z-index: 999 !important; }

.node__header {
    display: flex; align-items: center; gap: 9px; padding: 9px 11px;
    background: color-mix(in srgb, var(--type-color) 16%, var(--bg-3));
    border-bottom: 1px solid var(--border);
    border-radius: var(--radius) var(--radius) 0 0;
    cursor: grab; border-top: 2px solid var(--type-color);
    touch-action: none;
}
.node__header:active { cursor: grabbing; }
.node__icon { color: var(--type-color); font-size: 13px; }
.node__title { font-size: 12.5px; font-weight: 700; flex: 1; }
.node__subtitle { font-size: 10px; color: var(--text-3); font-family: var(--mono); }
.node__delete {
    width: 22px; height: 22px; border-radius: 5px; display: grid; place-items: center;
    color: var(--text-3); font-size: 12px; transition: all .12s ease;
}
.node__delete:hover { background: rgba(255,92,108,.15); color: var(--danger); }

.node__body { padding: 7px 0; }

.node__field { margin: 5px 11px; }
.node__field label { display: block; font-size: 10.5px; color: var(--text-3); margin-bottom: 3px; }
.node__field input, .node__field select {
    width: 100%; padding: 6px 8px; background: var(--bg-0);
    border: 1px solid var(--border-soft); border-radius: 5px;
    color: var(--text-1); font-size: 12px; font-family: var(--mono);
}
.node__field input:focus, .node__field select:focus { outline: none; border-color: var(--accent); }
.node__field select { cursor: pointer; }

.node__ports { padding-top: 3px; }
.port-row {
    display: flex; align-items: center; padding: 4px 12px;
    font-size: 11.5px; color: var(--text-2); position: relative; min-height: 24px;
}
.port-row--out { justify-content: flex-end; text-align: end; }
.port-row--in { justify-content: flex-start; }

.port {
    position: absolute; width: 14px; height: 14px; border-radius: 50%;
    background: var(--bg-1); border: 2px solid var(--port-color, var(--text-2));
    cursor: crosshair; transition: transform .12s ease, box-shadow .12s ease, background .12s ease;
    z-index: 5; touch-action: none;
}
.port--in { left: -8px; top: 50%; transform: translateY(-50%); }
.port--out { right: -8px; top: 50%; transform: translateY(-50%); }
/* ألوان المنافذ حسب نوع البيانات */
.port[data-dt="flow"]   { --port-color: #e6edf3; border-radius: 3px; }
.port[data-dt="number"] { --port-color: var(--cat-logic); }
.port[data-dt="string"] { --port-color: var(--cat-io); }
.port[data-dt="bool"]   { --port-color: var(--cat-loop); }
.port[data-dt="list"]   { --port-color: var(--cat-lib); }
.port[data-dt="dict"]   { --port-color: var(--accent-2); }
.port[data-dt="any"]    { --port-color: var(--text-2); }
.port:hover, .port.is-hot {
    background: var(--port-color);
    box-shadow: 0 0 0 5px color-mix(in srgb, var(--port-color) 28%, transparent);
    transform: translateY(-50%) scale(1.3);
}
.port.is-hot.is-invalid { box-shadow: 0 0 0 5px color-mix(in srgb, var(--danger) 40%, transparent); background: var(--danger); }
.port.is-connected { background: var(--port-color); }
.port-row__label { padding: 0 8px; pointer-events: none; }

/* ---------- 7) HUD + أزرار التكبير ---------- */
.coords-hud {
    position: absolute; bottom: 12px; left: 12px; padding: 5px 10px;
    background: rgba(11,15,22,.8); border: 1px solid var(--border);
    border-radius: 6px; font-family: var(--mono); font-size: 11px; color: var(--text-2);
    pointer-events: none; z-index: 15; backdrop-filter: blur(4px);
}
.zoom-controls {
    position: absolute; bottom: 12px; right: 12px; display: flex; flex-direction: column; gap: 6px; z-index: 15;
}
.zoom-btn {
    width: 40px; height: 40px; border-radius: 9px; background: rgba(23,31,43,.9);
    border: 1px solid var(--border); color: var(--text-1); font-size: 14px;
    display: grid; place-items: center; backdrop-filter: blur(4px);
    transition: all .12s ease;
}
.zoom-btn:hover { background: var(--bg-4); }

.empty-state {
    position: absolute; inset: 0; display: flex; flex-direction: column;
    align-items: center; justify-content: center; gap: 14px;
    color: var(--text-3); pointer-events: none; text-align: center; padding: 20px;
}
.empty-state i { font-size: 42px; opacity: .5; }
.empty-state p { font-size: 15px; }
.empty-state.is-hidden { display: none; }

/* ---------- 8) اللوحة الجانبية ---------- */
.datapanel {
    width: var(--datapanel-w); flex-shrink: 0; background: var(--bg-1);
    border-inline-start: 1px solid var(--border);
    display: flex; flex-direction: column; z-index: 30;
    transition: transform .25s ease;
}
.datapanel.is-collapsed { transform: translateX(-100%); }
[dir="rtl"] .datapanel.is-collapsed { transform: translateX(-100%); }

.datapanel__header {
    display: flex; align-items: center; justify-content: space-between; gap: 8px;
    padding: 9px 10px; border-bottom: 1px solid var(--border);
}
.datapanel__tabs { display: flex; gap: 3px; flex-wrap: wrap; }
.tab {
    padding: 6px 10px; font-size: 11.5px; font-weight: 600; color: var(--text-3);
    border-radius: 6px; transition: all .12s ease; display: inline-flex; align-items: center; gap: 5px;
}
.tab i { font-size: 11px; }
.tab:hover { color: var(--text-1); background: var(--bg-3); }
.tab--active { color: #fff; background: var(--accent); }
.datapanel__toolbtns { display: flex; gap: 5px; }

.datapanel__body { flex: 1; overflow: auto; position: relative; display: flex; flex-direction: column; }

/* عرض الكود (محرّر) */
.code-view { flex: 1; display: flex; flex-direction: column; min-height: 0; }
.code-editor-wrap { flex: 1; position: relative; min-height: 0; }
.code-editor {
    width: 100%; height: 100%; resize: none; border: none; outline: none;
    background: #0a0e14; color: var(--text-1);
    font-family: var(--mono); font-size: 13px; line-height: 1.7;
    padding: 14px 16px; white-space: pre; tab-size: 4;
    direction: ltr; text-align: left;
}
.code-editor::placeholder { color: var(--text-3); }
.code-view.is-invalid .code-editor { box-shadow: inset 0 0 0 2px color-mix(in srgb, var(--danger) 40%, transparent); }

.code-status {
    padding: 7px 14px; font-size: 11.5px; border-top: 1px solid var(--border-soft);
    font-family: var(--mono); direction: ltr; text-align: left;
    display: flex; align-items: center; gap: 8px;
}
.code-status__ok { color: var(--success); }
.code-status__err { color: var(--danger); }
.code-status__warn {
    color: var(--warn); direction: rtl; text-align: right;
    display: flex; align-items: flex-start; gap: 7px; flex-wrap: wrap;
    line-height: 1.6; font-family: var(--font);
}
.code-status__warn code {
    font-family: var(--mono); background: color-mix(in srgb, var(--warn) 16%, transparent);
    color: var(--text-1); padding: 1px 5px; border-radius: 4px; font-size: 11px;
}
.code-status:has(.code-status__warn) { direction: rtl; text-align: right; }
.code-status i { font-size: 11px; }

/* عرض JSON */
.json-view {
    padding: 14px; font-family: var(--mono); font-size: 12px; line-height: 1.65;
    color: var(--text-2); white-space: pre; tab-size: 2; direction: ltr; text-align: left;
}
.json-view .j-key { color: var(--accent); }
.json-view .j-str { color: var(--success); }
.json-view .j-num { color: var(--warn); }
.json-view .j-bool { color: var(--accent-2); }
.json-view .j-null { color: var(--text-3); }

/* إحصائيات */
.stats-view { padding: 16px; display: flex; flex-direction: column; gap: 12px; }
.stat-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.stat-card { background: var(--bg-2); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 14px 16px; }
.stat-card__value { font-size: 26px; font-weight: 700; color: var(--accent); font-family: var(--mono); }
.stat-card__label { font-size: 12px; color: var(--text-3); margin-top: 2px; }
.stat-breakdown { display: flex; flex-direction: column; gap: 6px; margin-top: 8px; }
.stat-row { display: flex; align-items: center; gap: 8px; font-size: 12px; color: var(--text-2); }
.stat-dot { width: 10px; height: 10px; border-radius: 50%; flex-shrink: 0; }

.datapanel__note {
    padding: 10px 12px; border-top: 1px solid var(--border-soft);
    font-size: 11px; color: var(--text-3); line-height: 1.6; display: flex; gap: 7px;
}
.datapanel__note i { color: var(--accent); margin-top: 2px; flex-shrink: 0; }
#btn-copy.copied { background: var(--success); color: #fff; }
#btn-sync-toggle.is-off { opacity: .45; }

/* ---------- 9) Toasts ---------- */
.toast-layer {
    position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%);
    display: flex; flex-direction: column; gap: 8px; z-index: 200; pointer-events: none;
    width: min(92vw, 440px);
}
.toast {
    display: flex; align-items: center; gap: 10px; padding: 12px 15px;
    background: var(--bg-3); border: 1px solid var(--border);
    border-inline-start: 4px solid var(--toast-color, var(--accent));
    border-radius: var(--radius-sm); box-shadow: var(--shadow);
    font-size: 13px; color: var(--text-1);
    animation: toastIn .25s ease; pointer-events: auto;
}
.toast.is-out { animation: toastOut .25s ease forwards; }
.toast i { color: var(--toast-color, var(--accent)); font-size: 15px; }
.toast--warn { --toast-color: var(--warn); }
.toast--error { --toast-color: var(--danger); }
.toast--success { --toast-color: var(--success); }
@keyframes toastIn { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: translateY(0); } }
@keyframes toastOut { to { opacity: 0; transform: translateY(12px); } }

/* ---------- 10) خلفية معتّمة للجوال ---------- */
.scrim {
    position: fixed; inset: 0; background: rgba(0,0,0,.55); z-index: 25;
    opacity: 0; visibility: hidden; transition: opacity .25s ease, visibility .25s ease;
}
.scrim.is-visible { opacity: 1; visibility: visible; }

/* ---------- 11) شريط التمرير ---------- */
::-webkit-scrollbar { width: 9px; height: 9px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 5px; }
::-webkit-scrollbar-thumb:hover { background: #3a4a63; }

/* ---------- 11.5) معرض المشاريع (Project Gallery) ---------- */
.gallery {
    position: fixed; top: var(--topbar-h); bottom: 0; inset-inline-end: 0;
    width: min(92vw, 400px); z-index: 45;
    display: flex; flex-direction: column;
    background: var(--bg-1); border-inline-start: 1px solid var(--border);
    box-shadow: var(--shadow);
    transform: translateX(100%);            /* مخفية افتراضياً */
    transition: transform .28s cubic-bezier(.4,0,.2,1);
}
[dir="rtl"] .gallery { transform: translateX(-100%); }
.gallery.is-open { transform: translateX(0); }

.gallery__header {
    display: flex; align-items: center; justify-content: space-between;
    padding: 14px 16px; border-bottom: 1px solid var(--border);
    background: linear-gradient(180deg, var(--bg-2), var(--bg-1));
}
.gallery__title { display: flex; align-items: center; gap: 9px; font-weight: 800; font-size: 15px; }
.gallery__title i { color: var(--accent); }
.gallery__close {
    width: 32px; height: 32px; display: grid; place-items: center;
    border-radius: 8px; color: var(--text-2); font-size: 15px;
    transition: background .15s ease;
}
.gallery__close:hover { background: var(--bg-3); color: var(--text-1); }

.gallery__toolbar {
    display: flex; gap: 8px; padding: 12px 16px; border-bottom: 1px solid var(--border-soft);
}
.gallery__toolbar .btn { flex: 1; justify-content: center; }

.gallery__list {
    flex: 1; overflow-y: auto; padding: 12px; display: flex; flex-direction: column; gap: 10px;
}

.gallery-empty {
    margin: auto; text-align: center; color: var(--text-3); padding: 40px 20px;
}
.gallery-empty i { font-size: 34px; margin-bottom: 12px; display: block; opacity: .6; }
.gallery-empty p { font-size: 13px; }

.gallery-card {
    display: flex; align-items: stretch; gap: 6px;
    background: var(--bg-2); border: 1px solid var(--border-soft);
    border-radius: var(--radius); padding: 6px; transition: border-color .15s ease, transform .12s ease;
}
.gallery-card:hover { border-color: #3a4a63; }
.gallery-card.is-active { border-color: var(--accent); box-shadow: 0 0 0 1px var(--accent) inset; }

.gallery-card__main {
    flex: 1; min-width: 0; padding: 8px 10px; border-radius: var(--radius-sm);
    cursor: pointer; transition: background .15s ease;
}
.gallery-card__main:hover { background: var(--bg-3); }
.gallery-card__name {
    font-weight: 700; font-size: 14px; color: var(--text-1);
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis; margin-bottom: 6px;
}
.gallery-card__badge {
    font-size: 10px; font-weight: 700; color: var(--accent);
    background: color-mix(in srgb, var(--accent) 18%, transparent);
    padding: 1px 7px; border-radius: 999px; vertical-align: middle;
}
.gallery-card__meta {
    display: flex; flex-wrap: wrap; gap: 4px 14px; font-size: 11.5px; color: var(--text-3);
}
.gallery-card__meta i { font-size: 10px; margin-inline-end: 3px; }

.gallery-card__actions {
    display: flex; flex-direction: column; justify-content: center; gap: 4px; padding-inline-end: 2px;
}
.gicon {
    width: 30px; height: 30px; display: grid; place-items: center;
    border-radius: 7px; color: var(--text-2); font-size: 12.5px;
    background: var(--bg-3); border: 1px solid var(--border-soft);
    transition: all .15s ease;
}
.gicon:hover { background: var(--bg-4); color: var(--text-1); transform: translateY(-1px); }
.gicon--danger:hover { background: color-mix(in srgb, var(--danger) 22%, var(--bg-4)); color: var(--danger); border-color: var(--danger); }

.gallery__footer {
    display: flex; align-items: flex-start; gap: 8px;
    padding: 12px 16px; border-top: 1px solid var(--border-soft);
    font-size: 11.5px; color: var(--text-3); line-height: 1.6;
}
.gallery__footer i { margin-top: 2px; color: var(--text-2); }

/* ---------- 12) الاستجابة ---------- */

/* أجهزة لوحية */
@media (max-width: 1100px) {
    :root { --datapanel-w: 340px; --sidebar-w: 240px; }
}

/* لوحي أصغر / أفقي */
@media (max-width: 900px) {
    .btn span { display: none; }
    .btn--accent span { display: inline; }
    .gallery__toolbar .btn span { display: inline; }
    .datapanel {
        position: absolute; inset-inline-end: 0; top: var(--topbar-h); bottom: 0;
        box-shadow: var(--shadow); width: min(90vw, 420px);
    }
    .topbar__project { max-width: 40vw; }
    .topbar__project-name { max-width: 30vw; }
}

/* هواتف */
@media (max-width: 680px) {
    :root { --sidebar-w: 78vw; }
    .topbar__menu { display: inline-flex; }
    .topbar__title small { display: none; }

    .sidebar {
        position: absolute; top: var(--topbar-h); bottom: 0; inset-inline-start: 0;
        box-shadow: var(--shadow); transform: translateX(100%);
    }
    [dir="rtl"] .sidebar { transform: translateX(100%); }
    .sidebar.is-open { transform: translateX(0); }
    .sidebar__close { display: block; }

    .datapanel { width: 92vw; transform: translateX(-100%); }
    [dir="rtl"] .datapanel { transform: translateX(-100%); }
    .datapanel:not(.is-collapsed) { transform: translateX(0); }
    .datapanel.is-collapsed { transform: translateX(-110%); }

    .node { min-width: 180px; }
    .zoom-controls { bottom: 16px; right: 16px; }
    .zoom-btn { width: 46px; height: 46px; font-size: 16px; }
    .toast-layer { bottom: 14px; }
}

/* تقليل الحركة عند التفضيل */
@media (prefers-reduced-motion: reduce) {
    * { transition: none !important; animation: none !important; }
}

/* ذيل حقوق الملكية */
.copyright-footer {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 10;
    text-align: center;
    font-size: 10.5px;
    color: var(--text-3);
    padding: 4px 12px;
    background: linear-gradient(to top, rgba(11,15,22,0.82), transparent);
    pointer-events: none;
    user-select: none;
    letter-spacing: 0.2px;
}

/* =======================================================================
   العُقد المخصصة — Custom Nodes
   ======================================================================= */

/* --- قسم المكتبة الجانبية --- */
.palette-group__title--custom {
    display: flex; align-items: center; gap: 8px;
    margin-top: 6px;
}
.palette-add-btn {
    margin-inline-start: auto;
    width: 26px; height: 26px; border-radius: 6px;
    display: grid; place-items: center; font-size: 13px;
    background: var(--bg-3); border: 1px solid var(--border);
    color: var(--cat-custom); transition: background .15s;
}
.palette-add-btn:hover { background: color-mix(in srgb, var(--cat-custom) 18%, var(--bg-3)); }

.custom-palette-empty {
    font-size: 12px; color: var(--text-3); padding: 6px 10px 4px;
    font-style: italic; line-height: 1.5;
}

.palette-item--custom { position: relative; padding-inline-end: 62px; }
.palette-item__actions {
    position: absolute; inset-inline-end: 6px; top: 50%; transform: translateY(-50%);
    display: flex; gap: 4px; opacity: 0; transition: opacity .15s;
}
.palette-item--custom:hover .palette-item__actions { opacity: 1; }
.palette-act-btn {
    width: 24px; height: 24px; border-radius: 5px; font-size: 11px;
    display: grid; place-items: center;
    background: var(--bg-3); border: 1px solid var(--border);
    color: var(--text-2); transition: background .12s, color .12s;
}
.palette-act-btn:hover { background: var(--bg-4); color: var(--text-1); }
.palette-act-btn--danger:hover { color: var(--danger); }

/* --- عقدة مفقودة في اللوحة --- */
.node--missing {
    --type-color: var(--danger);
    opacity: .82;
}
.node--missing .node__header { background: color-mix(in srgb, var(--danger) 14%, var(--bg-2)); }
.node__body--missing {
    padding: 10px 12px; color: var(--danger); font-size: 12px; line-height: 1.55;
}
.node__body--missing code {
    background: color-mix(in srgb, var(--danger) 15%, var(--bg-3));
    padding: 1px 5px; border-radius: 4px; font-family: var(--mono); font-size: 11px;
}

/* =======================================================================
   نافذة إنشاء/تعديل عقدة مخصصة
   ======================================================================= */

.cn-modal {
    position: fixed; inset: 0; z-index: 200;
    display: none; align-items: center; justify-content: center;
    background: rgba(0,0,0,.62);
    backdrop-filter: blur(4px);
    padding: 16px;
}
.cn-modal.is-open { display: flex; }

.cn-modal__box {
    background: var(--bg-2);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    width: min(540px, 100%);
    max-height: 92vh;
    display: flex; flex-direction: column;
    overflow: hidden;
}

.cn-modal__header {
    display: flex; align-items: center; gap: 10px;
    padding: 14px 18px;
    border-bottom: 1px solid var(--border-soft);
    background: var(--bg-3);
    flex-shrink: 0;
}
.cn-modal__title {
    font-size: 15px; font-weight: 700; color: var(--text-1); flex: 1;
}
.cn-modal__close {
    width: 28px; height: 28px; border-radius: 7px;
    display: grid; place-items: center; font-size: 14px;
    color: var(--text-3); transition: background .15s, color .15s;
}
.cn-modal__close:hover { background: var(--bg-4); color: var(--text-1); }

.cn-modal__form {
    padding: 18px; overflow-y: auto; flex: 1;
    display: flex; flex-direction: column; gap: 14px;
}

.cn-field { display: flex; flex-direction: column; gap: 5px; }
.cn-field--code { flex: 1; }
.cn-label {
    font-size: 12.5px; font-weight: 600; color: var(--text-2);
    display: flex; align-items: baseline; gap: 6px; flex-wrap: wrap;
}
.cn-label__hint {
    font-size: 11px; font-weight: 400; color: var(--text-3);
}
.cn-input, .cn-textarea {
    background: var(--bg-3); border: 1px solid var(--border);
    border-radius: var(--radius-sm); color: var(--text-1);
    font-family: var(--mono); font-size: 13px;
    padding: 7px 10px; outline: none;
    transition: border-color .15s;
}
.cn-input:focus, .cn-textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px var(--accent-glow);
}
.cn-textarea {
    resize: vertical; min-height: 110px; line-height: 1.55;
}
.cn-error {
    font-size: 12px; color: var(--danger);
    display: flex; align-items: center; gap: 5px;
}
.cn-error::before { content: "⚠ "; }

.cn-modal__footer {
    display: flex; justify-content: flex-end; gap: 8px;
    padding-top: 6px; border-top: 1px solid var(--border-soft);
    margin-top: 4px;
}