:root {
    --bg: #0b1c2d;
    --panel: #132c44;
    --border: #0e1822;
    --text: #e0e6ed;
    --accent: #a4bbd4;
}

* {
    box-sizing: border-box;
}

html, body {
    min-height: 100%;
}

body {
    font-family: Arial, sans-serif;
    margin: 16px;
    background: linear-gradient(
        to bottom,
        #dddddd -20%,
        var(--bg) 130%
    );
    color: var(--text);
    font-size: 14px;
}

h1 {
    margin-bottom: 16px;
    font-size: 20px;
    color: var(--accent);
}

/* Grid: mind. 500px pro Spalte, beliebig viele */

.sections {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 16px;
}


.section {
    grid-column: span 2;
}


.section.half {
    grid-column: span 1;
}



/* Section Card */
.section {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 22px 20px;
}

/* Header = Klickfläche */
.section h2 {
    margin: 0;
    font-size: 15px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--accent);
}

/* Pfeil */
.section h2::after {
    content: "▼";
    font-size: 12px;
    transition: transform 0.2s ease;
}

.section.collapsed h2::after {
    transform: rotate(-90deg);
}

/* Inhalt */
.section ul {
    margin: 10px 0 0;
    padding: 0;
    list-style: none;
}

.section.collapsed ul {
    display: none;
}

.section li {
    padding: 4px 0;
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

/* FluidNC Status Icons */
.section#senders li {
    position: relative;
    padding-left: 22px;
}

.section#senders li::before {
    position: absolute;
    left: 0;
    top: 2px;
    font-size: 14px;
}

/* ✅ CONNECTED */
.section#senders li.connected::before {
    content: "🟢";
}

/* ❌ DISCONNECTED */
.section#senders li.disconnected::before {
    content: "⛔";
}

/* 🟡 CONNECTING / RECONNECTING */
.section#senders li.connecting::before,
.section#senders li.reconnecting::before {
    content: "🟡";
}

/* Shelly / EmergencyStop: CSS-Kreis statt Emoji (volle Farbkontrolle) */
.section#senders li.shelly::before {
    content: "";
    display: block;
    position: absolute;
    left: 1px;
    top: 50%;
    transform: translateY(-50%);
    width: 11px;
    height: 11px;
    border-radius: 50%;
    /* Default: hellblau — Strom vorhanden, Shelly bereit */
    background: #89bcde;
    box-shadow: 0 0 0 1px rgba(0, 30, 60, 0.4);
}

/* Gestoppt: weiß — Strom wurde abgeschaltet */
.section#senders li.shelly.stopped::before {
    background: #dce9f5;
    box-shadow: 0 0 0 1px rgba(100, 160, 210, 0.5);
}

/* Fehler: gedämpftes Rot */
.section#senders li.shelly.error::before {
    background: #9a3a3a;
    box-shadow: 0 0 0 1px rgba(60, 0, 0, 0.5);
}

/* Getrennt / unbekannt: Grau */
.section#senders li.shelly.disconnected::before {
    background: #4a5a6a;
    box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.3);
}

.state-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(25px, 1fr));
    gap: 30px 30px;
    margin: 0;
    padding: 0;
    list-style: none;
}



.math-symbol {
    font-family: "Noto Sans Math", system-ui, sans-serif;
    font-weight: 400;
    font-style: italic;     /* ✅ echte math italic */
    font-synthesis: none;   /* extrem wichtig */
    font-size: 1.1em;
    line-height: 1;
    vertical-align: -0.05em;
    transform: skewX(-8deg);
    display: inline-block;

}



.state-grid li {
    display: flex;
    justify-content: space-between;
    padding: 4px 0;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.state-grid span:first-child {
    color: var(--accent);
    font-weight: bold;
}

/* ── Robot.json Tree ─────────────────────────────────────────────────────── */

#robotJsonLabel {
    font-size: 11px;
    font-weight: normal;
    opacity: 0.6;
    margin-left: 6px;
}

.section.collapsed #robotJsonTree {
    display: none;
}

.json-tree {
    margin-top: 10px;
}

.json-tree details {
    border-bottom: 1px solid rgba(255,255,255,0.05);
}

.json-tree details > summary {
    cursor: pointer;
    color: var(--accent);
    font-weight: bold;
    padding: 5px 0;
    list-style: none;
    display: flex;
    align-items: center;
    gap: 6px;
}

.json-tree details > summary::before {
    content: "▶";
    font-size: 10px;
    display: inline-block;
    transition: transform 0.15s ease;
}

.json-tree details[open] > summary::before {
    transform: rotate(90deg);
}

.json-tree details > pre {
    margin: 2px 0 6px 16px;
    font-size: 11px;
    white-space: pre-wrap;
    word-break: break-all;
    color: var(--text);
    opacity: 0.8;
    line-height: 1.5;
}

.json-tree .json-scalar {
    display: flex;
    justify-content: space-between;
    padding: 4px 0;
    border-bottom: 1px solid rgba(255,255,255,0.05);
    font-size: 13px;
}

.json-tree .json-scalar .json-key {
    color: var(--accent);
    font-weight: bold;
}

.json-tree .json-scalar .json-val {
    opacity: 0.85;
}

/* ── Robot.json History ──────────────────────────────────────────────────── */

#robotHistoryList li {
    cursor: pointer;
    font-size: 13px;
    font-family: monospace;
    transition: color 0.1s;
}

#robotHistoryList li:hover {
    color: #7ec8e3;
}

#robotHistoryList li.rh-active {
    color: #7ec8e3;
    font-weight: bold;
}

#robotHistoryList li.rh-active::before {
    content: "▶ ";
    font-size: 10px;
}

/* ── Emergency Stop Panel ────────────────────────────────────────────────── */

.estop-actions {
    margin-top: 12px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

/* Zentriert den SVG-Button horizontal im Panel */
.estop-center {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
}

/* SVG E-Stop / Start-Button */
#emergency-stop {
    display: block;        /* override framework display:none wenn nötig */
    position: relative;
    width: 78px;
    height: 78px;
    cursor: pointer;
    flex-shrink: 0;
    transition: transform 0.1s ease;
}

#emergency-stop:hover svg {
    filter: brightness(1.12);
}

#emergency-stop:active {
    transform: scale(0.93);
}

/* Zustandsanzeige unter dem Button */
.estop-armed-label {
    font-size: 12px;
    font-weight: bold;
    min-height: 16px;
    color: var(--muted);
}

.estop-armed-label.armed    { color: #e74c3c; }      /* Rot: Gefahr, bewusst laut */
.estop-armed-label.disarmed { color: #89bcde; }      /* Hellblau: ruhig, stromlos */

.btn {
    display: inline-block;
    padding: 9px 18px;
    border: none;
    border-radius: 5px;
    font-size: 14px;
    font-family: Arial, sans-serif;
    font-weight: bold;
    cursor: pointer;
    transition: background 0.15s, opacity 0.15s;
    align-self: flex-start;
}

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

/* Alarm-Unlock: ruhiges Blau — passend zum Stromloszustand */
.btn-unlock {
    background: #2a6496;
    color: #e8f2fa;
}

.btn-unlock:hover:not(:disabled) {
    background: #1e4d73;
}

/* Status-Zeile unterhalb der Buttons — immer weiß/hell, keine Signalfarben */
.estop-status {
    font-size: 13px;
    min-height: 18px;
    color: var(--text);
    opacity: 0.65;
}

.estop-status.ok  { color: var(--text); opacity: 0.9; }
.estop-status.err { color: var(--text); opacity: 0.9; }