:root {
    --bg-dark:    #0d1117;
    --bg-widget:  #161b22;
    --border:     #30363d;
    --accent:     #58a6ff;
    --accent-glow: rgba(88, 166, 255, 0.3);
    --text-main:  #c9d1d9;
    --text-muted: #8b949e;
    --good:       #3fb950;
    --warn:       #f9a825;
    --danger:     #f85149;
    --mono: 'Fira Code', monospace;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    min-height: 100vh;
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: var(--mono);
    padding: 1.5rem;
}

.app-shell {
    width: min(1600px, 100%);
    margin: 0 auto;
    min-height: calc(100vh - 3rem);
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 1.5rem;
}

/* ── SIDEBAR ── */
.control-rail {
    background: var(--bg-widget);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.rail-header {
    border-bottom: 1px solid var(--border);
    padding-bottom: 1rem;
    margin-bottom: 0.5rem;
}

.rail-header .eyebrow {
    margin: 0;
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--text-muted);
}

.rail-header h2 {
    margin: 0.4rem 0 0.6rem;
    font-size: 1.1rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    color: var(--text-main);
}

.live-chip {
    display: inline-block;
    font-size: 0.6rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--good);
    background: rgba(63, 185, 80, 0.1);
    border: 1px solid rgba(63, 185, 80, 0.25);
    border-radius: 4px;
    padding: 0.2rem 0.5rem;
}

.rail-section { display: grid; gap: 0.75rem; }

.section-title {
    margin: 0 0 0.25rem;
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--text-muted);
}

.rail-btn {
    width: 100%;
    background: var(--bg-dark);
    border: 1px solid var(--border);
    border-radius: 4px;
    font-family: var(--mono);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    padding: 0.8rem 1rem;
    cursor: pointer;
    color: var(--text-muted);
    transition: all 0.2s;
}

.rail-btn:hover {
    border-color: var(--accent);
    color: var(--text-main);
}

.rail-btn:active { transform: translateY(1px); }

.rail-btn.active {
    border-color: var(--accent);
    background: rgba(88, 166, 255, 0.12);
    color: var(--accent);
    box-shadow: 0 0 8px var(--accent-glow);
}

/* ── MAIN DASHBOARD ── */
.dashboard {
    display: grid;
    grid-template-rows: auto auto auto 1fr;
    gap: 1.25rem;
}

.title-row {
    background: var(--bg-widget);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 1rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.title-row h1 {
    margin: 0;
    font-size: 1.1rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    color: var(--text-main);
}

.subtitle {
    margin: 0.25rem 0 0;
    font-size: 0.75rem;
    color: var(--text-muted);
}

#run-state {
    margin: 0;
    font-family: var(--mono);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-size: 0.7rem;
    font-weight: 600;
    padding: 0.4rem 0.8rem;
    border-radius: 4px;
    border: 1px solid rgba(63, 185, 80, 0.35);
    color: var(--good);
    background: rgba(63, 185, 80, 0.1);
}

#run-state.state-manual {
    border-color: rgba(88, 166, 255, 0.35);
    color: var(--accent);
    background: rgba(88, 166, 255, 0.1);
}

/* ── TOP CONTROL GRID ── */
.top-grid {
    display: grid;
    grid-template-columns: 1.1fr 1.1fr 1fr;
    grid-template-rows: auto auto;
    gap: 1rem;
}

.panel {
    background: var(--bg-widget);
    border: 1px solid var(--border);
    border-radius: 6px;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.panel:hover {
    border-color: var(--accent);
    box-shadow: 0 0 12px var(--accent-glow);
}

.control-card {
    padding: 1rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.control-card label,
.control-card span {
    font-size: 0.75rem;
    color: var(--text-muted);
    white-space: nowrap;
}

.control-card input {
    width: min(150px, 100%);
    background: var(--bg-dark);
    border: 1px solid var(--border);
    color: var(--text-main);
    border-radius: 4px;
    font-family: var(--mono);
    font-size: 0.85rem;
    padding: 0.4rem 0.6rem;
    transition: border-color 0.2s;
}

.control-card input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 8px var(--accent-glow);
}

.control-span { grid-column: 1 / 3; }

#btn-temp-reg {
    margin-left: auto;
    border: 1px solid var(--accent);
    border-radius: 4px;
    font-family: var(--mono);
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    padding: 0.5rem 0.8rem;
    background: rgba(88, 166, 255, 0.1);
    color: var(--accent);
    cursor: pointer;
    transition: all 0.2s;
}

#btn-temp-reg:hover {
    background: var(--accent);
    color: var(--bg-dark);
}

#btn-temp-reg.active {
    border-color: var(--good);
    background: var(--good);
    color: var(--bg-dark);
}

/* ── MOVEMENT CARD ── */
.movement-card {
    display: block;
    padding: 1rem;
}

.movement-head {
    display: grid;
    gap: 0.2rem;
    margin-bottom: 0.75rem;
}

.movement-head p {
    margin: 0;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-main);
}

.movement-head span {
    font-size: 0.6rem;
    color: var(--text-muted);
}

.movement-buttons { display: flex; gap: 0.5rem; }

.movement-buttons button {
    flex: 1;
    background: var(--bg-dark);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 0.6rem;
    font-family: var(--mono);
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    color: var(--text-main);
    transition: all 0.2s;
}

.movement-buttons button:hover {
    border-color: var(--accent);
    color: var(--accent);
    box-shadow: 0 0 8px var(--accent-glow);
}

.movement-buttons button:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    border-color: var(--border);
    color: var(--text-muted);
    box-shadow: none;
}

/* ── STATUS LOG PANEL ── */
.status-panel {
    grid-column: 3 / 4;
    grid-row: 1 / 3;
    padding: 1rem;
    display: flex;
    flex-direction: column;
}

.status-panel h2 {
    margin: 0 0 0.75rem;
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--text-muted);
    font-weight: 600;
}

.status-log {
    flex: 1;
    overflow-y: auto;
    border-top: 1px solid var(--border);
    padding-top: 0.5rem;
    display: flex;
    flex-direction: column-reverse;
    gap: 0;
    font-size: 0.7rem;
}

.status-log p {
    margin: 0;
    padding: 0.4rem 0;
    border-top: 1px solid var(--border);
    color: var(--text-muted);
    line-height: 1.4;
    opacity: 0.9;
}

.status-log p:last-child { border-top: none; }
.status-log p.warn  { color: var(--warn); }
.status-log p.good  { color: var(--good); }
.status-log p.stop  { color: var(--danger); font-weight: 600; }

/* ── METRIC STRIP ── */
.metric-strip {
    display: grid;
    grid-template-columns: repeat(3, minmax(160px, 1fr));
    gap: 1rem;
}

.metric {
    background: var(--bg-widget);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 1rem 1.5rem;
    display: flex;
    align-items: baseline;
    gap: 0.5rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.metric:hover {
    border-color: var(--accent);
    box-shadow: 0 0 12px var(--accent-glow);
}

.metric p {
    margin: 0;
    color: var(--text-muted);
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.metric strong {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--accent);
    text-shadow: 0 0 10px rgba(88, 166, 255, 0.5);
    margin-left: auto;
}

.metric span {
    color: var(--text-muted);
    font-size: 0.75rem;
}

/* ── CHARTS ── */
.chart-grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 1rem;
}

.chart-panel {
    padding: 1rem;
    display: flex;
    flex-direction: column;
}

.chart-panel h3 {
    margin: 0 0 0.75rem;
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    font-weight: 600;
}

.canvas-wrap {
    position: relative;
    width: 100%;
    min-height: 250px;
    flex: 1;
}

canvas { width: 100% !important; height: 100% !important; }

/* ── RESPONSIVE ── */
@media (max-width: 1260px) {
    .app-shell {
        grid-template-columns: 1fr;
        height: auto;
    }
    .control-rail {
        display: grid;
        grid-template-columns: 1.2fr 1fr auto;
        align-items: stretch;
    }
}

@media (max-width: 1020px) {
    .top-grid {
        grid-template-columns: 1fr 1fr;
        grid-template-rows: auto auto auto;
    }
    .status-panel {
        grid-column: 1 / 3;
        grid-row: auto;
    }
    .control-span { grid-column: 1 / 3; }
    .chart-grid { grid-template-columns: 1fr; }
}

@media (max-width: 820px) {
    body { padding: 0.65rem; }
    .control-rail { grid-template-columns: 1fr; }
    .title-row { flex-direction: column; align-items: flex-start; gap: 0.75rem; }
    .top-grid { grid-template-columns: 1fr; }
    .status-panel, .control-span { grid-column: auto; }
    .metric-strip { grid-template-columns: 1fr; }
    .canvas-wrap { min-height: 230px; }
}