/* Simucircuit - Circuit simulator */

:root {
    --bg-dark: #0a0a0a;
    --workspace-bg: #111;
    --grid-color: rgba(255, 255, 255, 0.06);
    --accent: #00d4aa;
    --wire-color: #00d4aa;
    --comp-bg: rgba(0, 212, 170, 0.12);
    --comp-border: #00d4aa;
    --node-fill: #00d4aa;
    --text: #e0e0e0;
    --palette-bg: rgba(0, 0, 0, 0.6);
    --palette-border: rgba(0, 212, 170, 0.5);
}

* { box-sizing: border-box; }

html, body {
    height: 100%;
    margin: 0;
    overflow-x: hidden;
}

body {
    font-family: 'Inter', system-ui, sans-serif;
    background: var(--bg-dark);
    color: var(--text);
    min-height: 100vh;
}

.wrap {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    padding: 16px 20px;
    background: rgba(0, 0, 0, 0.8);
    border: 2px solid var(--accent);
    border-radius: 8px;
}

.topbar h1 {
    margin: 0;
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--accent);
}

.topbar .home {
    color: var(--accent);
    text-decoration: none;
    font-weight: 500;
}

.topbar .home:hover {
    text-decoration: underline;
}

/* Layout */
.simu-layout {
    display: flex;
    gap: 24px;
    min-height: 70vh;
}

/* Component palette */
.palette {
    width: 180px;
    flex-shrink: 0;
    background: var(--palette-bg);
    border: 1px solid var(--palette-border);
    border-radius: 8px;
    padding: 16px;
}

.palette-title {
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--accent);
    font-size: 0.9rem;
}

.palette-title-tools {
    margin-top: 18px;
}

.palette-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    margin-bottom: 8px;
    border-radius: 6px;
    cursor: grab;
    border: 1px solid transparent;
    font-size: 0.9rem;
}

.palette-item:hover {
    background: rgba(0, 212, 170, 0.15);
    border-color: var(--palette-border);
}

.palette-item:active {
    cursor: grabbing;
}

.palette-icon {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    font-weight: 600;
    font-size: 0.85rem;
    font-family: 'JetBrains Mono', monospace;
}

.palette-icon.R { background: rgba(255, 180, 0, 0.3); color: #ffb400; }
.palette-icon.C { background: rgba(100, 200, 255, 0.3); color: #64c8ff; }
.palette-icon.V { background: rgba(255, 100, 100, 0.3); color: #ff6464; }
.palette-icon.I { background: rgba(150, 100, 255, 0.3); color: #9664ff; }
.palette-icon.G { background: rgba(220, 220, 220, 0.15); color: #dcdcdc; }
.palette-icon.VA { background: rgba(255, 160, 80, 0.3); color: #ffb46a; }
.palette-icon.IA { background: rgba(200, 120, 255, 0.3); color: #e0a0ff; }
.palette-icon.MM { background: rgba(0, 255, 200, 0.25); color: #00ffd5; }
.palette-icon.S { background: rgba(0, 180, 255, 0.25); color: #00b4ff; }

.palette-hint {
    margin-top: 16px;
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.5);
}

/* Workspace */
.workspace-wrap {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.workspace-toolbar {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 12px;
}

.ws-btn {
    padding: 8px 16px;
    background: var(--comp-bg);
    border: 1px solid var(--comp-border);
    color: var(--accent);
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.9rem;
}

.ws-btn:hover {
    background: rgba(0, 212, 170, 0.25);
}

.ws-btn-primary {
    background: rgba(0, 212, 170, 0.22);
}

.ws-btn-primary:hover {
    background: rgba(0, 212, 170, 0.35);
}

.ws-btn-secondary {
    background: rgba(255, 255, 255, 0.03);
    color: rgba(255, 255, 255, 0.8);
}

.ws-btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
}

.ws-btn-danger {
    background: rgba(255, 80, 80, 0.15);
    border-color: rgba(255, 100, 100, 0.45);
    color: #ffaaaa;
}

.ws-btn-danger:hover {
    background: rgba(255, 80, 80, 0.28);
}

.ws-btn:disabled {
    opacity: 0.45;
    cursor: not-allowed;
}

.ws-hint {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.6);
}

.workspace {
    flex: 1;
    min-height: 500px;
    position: relative;
    background: var(--workspace-bg);
    background-image:
        linear-gradient(var(--grid-color) 1px, transparent 1px),
        linear-gradient(90deg, var(--grid-color) 1px, transparent 1px);
    background-size: 20px 20px;
    border: 1px solid var(--palette-border);
    border-radius: 8px;
}

.wire-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.wire-layer .wire {
    pointer-events: stroke;
    stroke-width: 2;
}

.wire-layer .wire:hover {
    stroke: #00ffcc;
    stroke-width: 3;
}

.wire-layer .wire.wire-selected {
    stroke: #ffb400;
    stroke-width: 3;
}

.components-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.components-layer > * {
    pointer-events: auto;
}

/* Component on canvas */
.comp {
    position: absolute;
    width: 80px;
    height: 44px;
    background: var(--comp-bg);
    border: 1px solid var(--comp-border);
    border-radius: 6px;
    cursor: move;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    user-select: none;
    transform-origin: 50% 50%;
}

.comp.dragging {
    opacity: 0.9;
    z-index: 1000;
}

.comp .node {
    position: absolute;
    top: 50%;
    width: 12px;
    height: 12px;
    margin-top: -6px;
    border-radius: 50%;
    background: var(--node-fill);
    border: 2px solid var(--bg-dark);
    cursor: crosshair;
    pointer-events: auto;
}

.comp .node.node-a { left: -6px; }
.comp .node.node-b { right: -6px; }

.comp .node:hover {
    transform: scale(1.2);
    box-shadow: 0 0 8px var(--accent);
}

.comp.selected {
    box-shadow: 0 0 0 2px rgba(0, 212, 170, 0.9);
}

.comp .label {
    color: var(--accent);
    font-weight: 600;
}

.comp .value {
    position: absolute;
    bottom: 2px;
    font-size: 0.65rem;
    color: rgba(255, 255, 255, 0.7);
}

.comp .value-freq {
    position: absolute;
    bottom: -10px;
    font-size: 0.58rem;
    color: rgba(160, 220, 255, 0.85);
}

/* Component type visuals */
.comp.resistor .label::before { content: 'R'; }
.comp.capacitor .label::before { content: 'C'; }
.comp.vsource .label::before { content: 'V'; }
.comp.isource .label::before { content: 'I'; }

.comp.capacitor .label::before { content: 'C'; }
.comp.vsource .label { font-size: 0.7rem; }
.comp.isource .label { font-size: 0.7rem; }

/* Temp wire while dragging */
.wire-temp {
    stroke: var(--wire-color);
    stroke-width: 2;
    stroke-dasharray: 6 4;
    animation: dash 0.3s linear infinite;
}

@keyframes dash {
    to { stroke-dashoffset: -10; }
}

/* Source polarity labels */
.comp .pol {
    position: absolute;
    top: -14px;
    font-size: 0.7rem;
    font-weight: 700;
    font-family: 'JetBrains Mono', monospace;
    color: rgba(255, 255, 255, 0.8);
    pointer-events: none;
}

.comp .pol.pol-a { left: 4px; }
.comp .pol.pol-b { right: 4px; }

.comp.vsource .pol {
    color: rgba(255, 100, 100, 0.95);
}

.comp.isource .pol {
    color: rgba(150, 100, 255, 0.95);
}

.comp.multimeter .pol,
.comp.scope .pol {
    color: rgba(0, 255, 220, 0.95);
}

/* Ground visual */
.comp.ground {
    width: 66px;
    height: 40px;
    border-style: dashed;
}

.comp.ground .label {
    color: rgba(220, 220, 220, 0.9);
}

.comp.ground .value { display: none; }
.comp.ground .node.node-b { display: none; }

/* Results panel */
.sim-results {
    margin-top: 12px;
    padding: 12px 14px;
    border: 1px solid var(--palette-border);
    border-radius: 8px;
    background: rgba(0, 0, 0, 0.55);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    min-height: 44px;
    white-space: pre-wrap;
}

.sim-results.is-empty {
    color: rgba(255, 255, 255, 0.45);
}

.sim-results .err {
    color: rgba(255, 120, 120, 0.95);
}

/* Context menu */
.ctx-menu {
    position: fixed;
    z-index: 2000;
    min-width: 160px;
    background: rgba(10, 10, 10, 0.96);
    border-radius: 8px;
    border: 1px solid rgba(0, 212, 170, 0.6);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.8);
    padding: 4px 0;
    font-family: 'Inter', system-ui, sans-serif;
    font-size: 0.85rem;
}

.ctx-menu.hidden {
    display: none;
}

.ctx-menu-item {
    padding: 6px 12px;
    color: rgba(240, 240, 240, 0.9);
    cursor: pointer;
}

.ctx-menu-item:hover {
    background: rgba(0, 212, 170, 0.18);
}

.ctx-menu-sep {
    height: 1px;
    margin: 4px 0;
    background: rgba(255, 255, 255, 0.08);
}

/* Modal + overlay */
.simu-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.75);
    z-index: 1900;
}

.hidden {
    display: none !important;
}

.simu-modal {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1950;
}

.simu-modal-inner {
    width: min(420px, 90vw);
    background: #050707;
    border-radius: 10px;
    border: 1px solid rgba(0, 212, 170, 0.7);
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.9);
    padding: 14px 16px 10px;
}

.simu-modal-header {
    margin-bottom: 8px;
}

.simu-modal-title {
    margin: 0;
    font-size: 1.05rem;
    color: var(--accent);
}

.simu-modal-body {
    font-size: 0.9rem;
    color: rgba(240, 240, 240, 0.9);
    margin-bottom: 12px;
}

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

.simu-modal-btn {
    font-size: 0.85rem;
}

.simu-modal-body p {
    margin: 0 0 8px;
}

.simu-modal-body ul {
    margin: 4px 0 0 16px;
    padding: 0;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8rem;
}

.simu-modal-body li {
    margin-bottom: 2px;
}

.simu-input {
    width: 100%;
    padding: 6px 8px;
    border-radius: 6px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    background: rgba(0, 0, 0, 0.8);
    color: #f5f5f5;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    margin-bottom: 6px;
}

.simu-input::placeholder {
    color: rgba(200, 200, 200, 0.45);
}

.simu-chip-row {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: 4px;
}

.simu-chip {
    padding: 2px 8px;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.25);
    background: rgba(255, 255, 255, 0.03);
    color: rgba(240, 240, 240, 0.9);
    font-size: 0.75rem;
    cursor: pointer;
    white-space: nowrap;
}

.simu-chip:hover {
    background: rgba(0, 212, 170, 0.16);
    border-color: rgba(0, 212, 170, 0.7);
}

.simu-chip.active {
    background: rgba(0, 212, 170, 0.32);
    border-color: rgba(0, 212, 170, 0.9);
    color: #eaffff;
}

.simu-help-note {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.55);
}

.simu-scope-controls {
    display: flex;
    gap: 10px;
    margin-top: 8px;
    margin-bottom: 6px;
    font-size: 0.75rem;
}

.simu-scope-control {
    flex: 1;
}

.simu-scope-control input[type="range"] {
    width: 100%;
}

.simu-error {
    margin-top: 4px;
    font-size: 0.78rem;
    color: rgba(255, 120, 120, 0.95);
}