:root {
    --bg: #0b1220;
    --panel-left: #419248;
    --panel-right: #2c7896;
    --accent: #38bdf8;
    --green: #000000;
    --text: #000000;
    --box: #e7dcab;
    --box-hover: #d7c79a;
    --line: rgba(255, 255, 255, 0.12);

    --topbarH: 56px;
    /* panouri mai late decât simulările standard (~250px) */
    --ca-pl-w: 400px;
    --ca-pr-w: 420px;
}

* {
    box-sizing: border-box;
}

html,
body {
    height: 100%;
}

body {
    margin: 0;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    min-height: 100dvh;
    background: #0f172a;
    font-family: ui-sans-serif, system-ui, Segoe UI, Roboto, sans-serif;
    overflow: hidden;
}

.topbar {
    flex-shrink: 0;
    height: var(--topbarH);
    display: flex;
    align-items: center;
    padding: 8px 14px;
    border-bottom: 1px solid var(--line);
    background: rgba(15, 23, 42, 0.92);
    backdrop-filter: blur(8px);
}

.brand h1 {
    margin: 0;
    font-size: 17px;
    font-weight: 800;
    color: var(--accent);
    letter-spacing: 0.3px;
}

.brand p {
    margin: 4px 0 0;
    font-size: 12px;
    color: rgba(148, 163, 184, 0.95);
}

.layout {
    position: relative;
    flex: 1;
    min-height: 0;
    display: flex;
    flex-direction: column;
    height: calc(100vh - var(--topbarH));
    height: calc(100dvh - var(--topbarH));
}

.caStageShell {
    flex: 1;
    min-height: 0;
    display: flex;
    flex-direction: column;
}

/* panouri fixe — fără margini pe centru */
.panel {
    position: fixed;
    top: var(--topbarH);
    bottom: 0;
    width: var(--ca-pl-w);
    max-width: 100%;
    display: flex;
    flex-direction: column;
    gap: 12px;
    padding: 14px;
    overflow-y: auto;
    z-index: 150;
    transition: transform 0.28s ease;
    -webkit-overflow-scrolling: touch;
    border: 1px solid var(--line);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
}

.panel::-webkit-scrollbar {
    width: 6px;
}

.panel::-webkit-scrollbar-thumb {
    background: #38bdf8;
    border-radius: 3px;
}

.panel::-webkit-scrollbar-track {
    background: transparent;
}

.panel.left {
    left: 0;
    background: var(--panel-left);
    border-right: 1px solid var(--line);
}

.panel.right {
    right: 0;
    width: var(--ca-pr-w);
    background: var(--panel-right);
    border-left: 1px solid var(--line);
}

.panel.left.hidden {
    transform: translateX(-100%);
    pointer-events: none;
}

.panel.right.hidden {
    transform: translateX(100%);
    pointer-events: none;
}

.panelHeader {
    margin-bottom: 4px;
}

.panelHeader h2 {
    margin: 0;
    font-size: 15px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    color: var(--accent);
    border-left: 3px solid var(--accent);
    padding: 6px 10px;
    background: #00000030;
}

.ca-toggle {
    position: fixed;
    z-index: 210;
    top: calc(var(--topbarH) + 8px);
    width: 44px;
    height: 44px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    border: 1px solid rgba(56, 189, 248, 0.45);
    cursor: pointer;
    font-size: 20px;
    line-height: 1;
    font-weight: 800;
    color: #e2e8f0;
    background: linear-gradient(180deg, rgba(30, 41, 59, 0.95), rgba(15, 23, 42, 0.98));
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.35);
    transition: left 0.28s ease, right 0.28s ease, transform 0.15s ease;
}

.ca-toggle:hover {
    transform: translateY(-1px);
}

.ca-toggle-left {
    border-color: rgba(65, 146, 72, 0.6);
}

.ca-toggle-right {
    border-color: rgba(44, 120, 150, 0.7);
}

.center {
    flex: 1;
    position: relative;
    min-height: 0;
    overflow: hidden;
    background: #0f172a;
}

.section {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.section h3 {
    margin-top: 6px;
    padding: 6px 10px;
    font-size: 16px;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    color: var(--accent);
    border-left: 3px solid var(--accent);
    background: #00000030;
}

.box {
    background: var(--box);
    padding: 12px;
    border-radius: 6px;
    border: 1px solid #ffffff10;
    font-size: 13px;
    line-height: 1.45;
    transition: 0.2s;
}

.box:hover {
    transform: scale(1.01);
}

label {
    display: flex;
    flex-direction: column;
    font-size: 12px;
    color: white;
    gap: 4px;
    margin-bottom: 8px;
}

input[type="range"] {
    width: 100%;
    accent-color: #38bdf8;
}

#canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

#instant,
#power {
    color: var(--green);
    font-weight: bold;
}

#miniGraph {
    width: 100%;
    height: 150px;
    background: #0b1a2a;
    border-radius: 4px;
    border: 1px solid #ffffff10;
}

#mode {
    color: var(--text);
    font-size: 12px;
    font-weight: bold;
    text-transform: uppercase;
    letter-spacing: 1px;
    border-radius: 6px;
    border-left: 3px solid var(--accent);
    background: var(--box);
    padding: 8px 10px;
    outline: none;
    cursor: pointer;
}

#mode:hover {
    background: var(--box-hover);
}

#mode:focus {
    outline: none;
}

.legend {
    display: flex;
    justify-content: space-around;
    margin-top: 6px;
    font-size: 12px;
    color: rgba(255, 255, 255, 0.9);
}

.legend span {
    display: flex;
    align-items: center;
    gap: 5px;
}

.legend span::before {
    content: "";
    width: 10px;
    height: 10px;
    display: inline-block;
}

.legend .u::before {
    background: #38bdf8;
}

.legend .i::before {
    background: #22c55e;
}

.legend .p::before {
    background: #facc15;
}

#phasor {
    width: 100%;
    height: 200px;
    background: #0b1a2a;
    border-radius: 6px;
    margin-top: 6px;
    border: 1px solid #ffffff10;
}

@media (max-width: 1600px) {
    :root {
        --ca-pl-w: 360px;
        --ca-pr-w: 380px;
    }
}

@media (max-width: 1200px) {
    :root {
        --ca-pl-w: 320px;
        --ca-pr-w: 340px;
    }
}

@media (max-width: 1024px) {
    :root {
        --ca-pl-w: min(92vw, 400px);
        --ca-pr-w: min(92vw, 420px);
    }

    .caStageShell {
        min-height: min(42vh, 420px);
    }
}

@media (prefers-reduced-motion: reduce) {

    .panel,
    .ca-toggle {
        transition: none;
    }

    .box:hover {
        transform: none;
    }
}