/* ==========================================================================
   NEXUS — Railway Intelligence Operations Console
   Topbar layout, 3-panel ops room, zero scroll, industrial aesthetic
   ========================================================================== */

:root {
    --surface-0: #0b0c0f;
    --surface-1: #101219;
    --surface-2: #151820;
    --surface-3: #1a1d27;
    --surface-raised: #1f2230;

    --border-subtle: rgba(255,255,255,0.035);
    --border-default: rgba(255,255,255,0.06);
    --border-strong: rgba(255,255,255,0.12);

    --accent: #4f8ff7;
    --accent-dim: rgba(79,143,247,0.1);
    --signal-ok: #34d399;
    --signal-warn: #fbbf24;
    --signal-danger: #ef4444;
    --signal-info: #60a5fa;

    --text-0: #e4e7ec;
    --text-1: #9ca3af;
    --text-2: #5c6370;

    --font-sans: 'Plus Jakarta Sans', system-ui, sans-serif;
    --font-display: 'Outfit', var(--font-sans);
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    --ease: cubic-bezier(0.16, 1, 0.3, 1);
    --dur: 0.2s;
    --topbar-h: 48px;
}

*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; }

body {
    background: var(--surface-0);
    color: var(--text-0);
    font-family: var(--font-sans);
    font-size: 13px;
    line-height: 1.45;
    overflow: hidden;
    height: 100vh;
    width: 100vw;
    -webkit-font-smoothing: antialiased;
}

h1,h2,h3,h4,h5,h6 {
    font-family: var(--font-display);
    font-weight: 600;
    color: var(--text-0);
}

/* Noise grain */
body::after {
    content:'';
    position:fixed;
    inset:0;
    opacity:0.02;
    pointer-events:none;
    z-index:9999;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* Ambient glows */
.bg-mesh-1,.bg-mesh-2 { position:fixed; inset:0; pointer-events:none; z-index:0; }
.bg-mesh-1 { background: radial-gradient(ellipse 50% 50% at 8% 85%, rgba(79,143,247,0.035), transparent); }
.bg-mesh-2 { background: radial-gradient(ellipse 35% 45% at 92% 15%, rgba(52,211,153,0.02), transparent); }

/* ═══════════════════════════════════════════════
   APP SHELL — topbar + main
   ═══════════════════════════════════════════════ */
.app-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    position: relative;
    z-index: 1;
}

/* ─── TOPBAR ─── */
.topbar {
    height: var(--topbar-h);
    background: var(--surface-1);
    border-bottom: 1px solid var(--border-default);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1.25rem;
    flex-shrink: 0;
    z-index: 10;
}

.topbar-left { display: flex; align-items: center; gap: 0; }

.logo-mark {
    width: 30px; height: 30px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-strong);
    border-radius: 6px;
    display: grid; place-items: center;
    margin-right: 0.5rem;
}
.logo-svg {
    width: 16px;
    height: 16px;
}

.logo-text { display: flex; flex-direction: column; margin-right: 1.5rem; line-height: 1; }
.logo-title {
    font-family: var(--font-display);
    font-size: 1rem; font-weight: 700;
    letter-spacing: 0.06em; color: var(--text-0);
}
.logo-sub {
    font-family: var(--font-mono);
    font-size: 0.5rem; color: var(--text-2);
    letter-spacing: 0.1em; text-transform: uppercase;
}

.topbar-divider {
    width: 1px; height: 22px;
    background: var(--border-default);
    margin-right: 1rem;
}

.topbar-nav { display: flex; gap: 2px; }

.nav-tab {
    display: flex; align-items: center; gap: 0.375rem;
    padding: 0.375rem 0.75rem;
    color: var(--text-2);
    text-decoration: none;
    font-size: 0.75rem; font-weight: 500;
    border-radius: 5px;
    transition: color var(--dur), background var(--dur);
}
.nav-tab i { font-size: 0.7rem; }
.nav-tab:hover { color: var(--text-1); background: rgba(255,255,255,0.03); }
.nav-tab.active { color: var(--text-0); background: var(--accent-dim); }

.topbar-right { display: flex; align-items: center; gap: 0.75rem; }

.topbar-status {
    display: flex; align-items: center; gap: 0.3rem;
    font-family: var(--font-mono);
    font-size: 0.625rem; color: var(--signal-ok);
}
.status-dot {
    width: 5px; height: 5px;
    border-radius: 50%;
    background: currentColor;
    animation: blink 2s ease infinite;
}
.status-dot.connected { color: var(--signal-ok); }

@keyframes blink { 0%,100%{opacity:1} 50%{opacity:0.25} }

.btn-ghost {
    background: transparent;
    border: 1px solid var(--border-default);
    color: var(--text-2);
    padding: 0.3rem 0.625rem;
    border-radius: 5px;
    font-size: 0.6875rem; font-weight: 500;
    font-family: var(--font-sans);
    cursor: pointer;
    transition: all var(--dur);
}
.btn-ghost:hover { color: var(--text-0); border-color: var(--border-strong); }

/* ─── MAIN AREA ─── */
.main-area {
    flex: 1;
    overflow: hidden;
    padding: 0.75rem;
}

/* ═══════════════════════════════════════════════
   OPS ROOM — the dashboard, zero scroll
   ═══════════════════════════════════════════════ */
.ops-room {
    display: flex;
    flex-direction: column;
    height: 100%;
    gap: 0.625rem;
}

/* ── KPI Strip ── */
.kpi-strip {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.5rem;
    flex-shrink: 0;
}

.kpi-card {
    background: var(--surface-1);
    border: 1px solid var(--border-default);
    border-radius: 6px;
    padding: 0.625rem 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.kpi-icon {
    width: 32px; height: 32px;
    border-radius: 6px;
    display: grid; place-items: center;
    font-size: 0.8rem;
    flex-shrink: 0;
}
.kpi-icon.accent { background: var(--accent-dim); color: var(--accent); }
.kpi-icon.info   { background: rgba(96,165,250,0.1); color: var(--signal-info); }
.kpi-icon.danger { background: rgba(239,68,68,0.08); color: var(--signal-danger); }
.kpi-icon.warn   { background: rgba(251,191,36,0.1); color: var(--signal-warn); }

.kpi-body { display: flex; flex-direction: column; flex: 1; min-width: 0; }
.kpi-label {
    font-size: 0.5625rem; color: var(--text-2);
    text-transform: uppercase; font-weight: 600;
    letter-spacing: 0.04em; font-family: var(--font-mono);
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.kpi-value {
    font-size: 1.25rem; font-weight: 700;
    font-family: var(--font-display);
    line-height: 1.15; color: var(--text-0);
}
.kpi-badge {
    font-size: 0.5625rem; font-weight: 500;
    font-family: var(--font-mono);
    white-space: nowrap;
    padding: 0.15rem 0.35rem;
    border-radius: 3px;
}
.kpi-badge.ok   { color: var(--signal-ok); background: rgba(52,211,153,0.08); }
.kpi-badge.warn { color: var(--signal-warn); background: rgba(251,191,36,0.08); }
.kpi-badge.muted { color: var(--text-2); background: rgba(255,255,255,0.03); }

/* ── 3-Panel Grid ── */
.ops-grid {
    display: grid;
    grid-template-columns: 1fr 300px 280px;
    gap: 0.625rem;
    flex: 1;
    min-height: 0;
}

/* ── Panels (unified card style) ── */
.panel {
    background: var(--surface-1);
    border: 1px solid var(--border-default);
    border-radius: 6px;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    min-height: 0;
}

.panel-head {
    padding: 0.5rem 0.75rem;
    border-bottom: 1px solid var(--border-subtle);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-shrink: 0;
    background: var(--surface-2);
}

.panel-head h2 {
    font-size: 0.6875rem;
    font-weight: 600;
    color: var(--text-1);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    display: flex; align-items: center; gap: 0.375rem;
}

.panel-head h2 i { font-size: 0.6875rem; color: var(--text-2); }

.panel-body {
    padding: 0.75rem;
    flex: 1;
    overflow-y: auto;
    min-height: 0;
}

/* ── Map Panel ── */
.panel-map .map-container-wrapper {
    padding: 0;
    position: relative;
    background: var(--surface-0);
    flex: 1;
}

.panel-map .panel-body { padding: 0; }

.svg-map-container {
    width: 100%; height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
}

#railway-svg { width: 100%; height: 100%; }

.map-legend { display: flex; gap: 0.5rem; }
.legend-item {
    font-size: 0.5625rem; color: var(--text-2);
    display: flex; align-items: center; gap: 0.2rem;
    font-family: var(--font-mono);
}
.legend-dot { width: 5px; height: 5px; border-radius: 50%; }
.legend-dot.station        { background: #fff; }
.legend-dot.junction       { background: var(--accent); }
.legend-dot.normal-track   { background: rgba(255,255,255,0.1); }
.legend-dot.anomalous-track { background: var(--signal-danger); }
.legend-dot.train          { background: var(--signal-info); }

/* SVG */
.svg-station-node { fill: var(--surface-3); stroke: rgba(255,255,255,0.35); stroke-width: 1.5; cursor: pointer; transition: fill var(--dur); }
.svg-station-node:hover { fill: #fff; stroke: #fff; filter: drop-shadow(0 0 3px rgba(255,255,255,0.4)); }
.svg-station-node.junction { stroke: var(--accent); stroke-width: 2px; }
.svg-station-node.junction:hover { fill: var(--accent); filter: drop-shadow(0 0 5px rgba(79,143,247,0.5)); }

.svg-station-label { fill: var(--text-2); font-family: var(--font-mono); font-size: 8px; font-weight: 500; pointer-events: none; }
.svg-station-group:hover .svg-station-label { fill: var(--text-0); }

.svg-track-line { stroke: rgba(255,255,255,0.06); stroke-width: 2; stroke-linecap: round; cursor: pointer; transition: stroke var(--dur); }
.svg-track-line:hover { stroke: rgba(255,255,255,0.15); stroke-width: 3; }
.svg-track-line.anomalous { stroke: var(--signal-danger); stroke-width: 3.5; stroke-dasharray: 7 3; animation: track-pulse 1.2s ease infinite alternate; }

@keyframes track-pulse { from{opacity:.5} to{opacity:1} }

.svg-train-marker { fill: var(--signal-info); stroke: var(--surface-0); stroke-width: 1.5; cursor: pointer; transition: fill var(--dur); }
.svg-train-marker:hover { fill: #fff; filter: drop-shadow(0 0 5px var(--signal-info)); }
.svg-train-marker.delayed { fill: var(--signal-warn); }

.map-tooltip {
    position: absolute;
    background: var(--surface-3);
    border: 1px solid var(--border-strong);
    padding: 0.5rem 0.625rem;
    border-radius: 4px;
    font-size: 0.625rem;
    font-family: var(--font-mono);
    pointer-events: none;
    z-index: 100;
    box-shadow: 0 6px 20px rgba(0,0,0,0.5);
    color: var(--text-1);
    transition: opacity var(--dur);
    max-width: 220px;
}
.map-tooltip h4 { font-size: 0.6875rem; margin-bottom: 0.2rem; color: var(--text-0); font-family: var(--font-display); }

/* ── Control Panel (center) ── */
.panel-control {
    display: flex;
    flex-direction: column;
}

.escalation-card {
    background: rgba(251,191,36,0.03);
    border-bottom: 1px solid rgba(251,191,36,0.1);
    padding: 0.625rem 0.75rem;
}

.escalation-head {
    display: flex; align-items: center; gap: 0.375rem;
    margin-bottom: 0.375rem;
}
.escalation-head h3 {
    font-size: 0.625rem; font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.mini-chart-wrap {
    height: 110px;
    position: relative;
}

/* ── Feed Panel (right) ── */
.feed-container { display: flex; flex-direction: column; gap: 0.375rem; }

.feed-empty-state {
    display: flex; flex-direction: column;
    align-items: center; justify-content: center;
    padding: 1.5rem; text-align: center;
    gap: 0.375rem; color: var(--text-2);
    font-size: 0.75rem; height: 100%;
}
.feed-empty-state i { font-size: 1rem; }

.feed-item {
    background: var(--surface-2);
    border-left: 2px solid var(--border-default);
    border-radius: 0 4px 4px 0;
    padding: 0.5rem 0.625rem;
    display: flex; flex-direction: column;
    gap: 0.1rem; cursor: pointer;
    transition: background var(--dur);
}
.feed-item:hover { background: var(--surface-3); }
.feed-item.critical { border-left-color: var(--signal-danger); }
.feed-item.warning  { border-left-color: var(--signal-warn); }
.feed-item.resolved { border-left-color: var(--signal-ok); }

.feed-item-header { display: flex; justify-content: space-between; align-items: center; }
.feed-item-title { font-weight: 600; font-size: 0.6875rem; color: var(--text-0); font-family: var(--font-mono); }
.feed-item-time { font-size: 0.5625rem; color: var(--text-2); font-family: var(--font-mono); }
.feed-item-desc { font-size: 0.625rem; color: var(--text-2); }
.feed-item-footer { display: flex; justify-content: space-between; font-size: 0.5625rem; color: var(--text-2); font-family: var(--font-mono); }

/* ═══════════════════════════════════════════════
   SECONDARY TABS (non-dashboard)
   ═══════════════════════════════════════════════ */
.full-panel { height: 100%; }
.full-panel .panel { height: 100%; }

.insights-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.625rem;
    height: 100%;
}
.insights-grid .panel { height: 100%; }

/* ── Buttons ── */
.btn {
    display: inline-flex; align-items: center; gap: 0.3rem;
    padding: 0.4rem 0.75rem;
    border-radius: 5px;
    font-weight: 600; font-size: 0.75rem;
    font-family: var(--font-sans);
    cursor: pointer; transition: all var(--dur);
    border: 1px solid transparent;
}
.btn-primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn-primary:hover { background: #3d7de0; }
.btn-secondary { background: var(--surface-3); border-color: var(--border-strong); color: var(--text-1); }
.btn-secondary:hover { color: var(--text-0); }
.btn-block { display: flex; width: 100%; justify-content: center; }
.btn-small { padding: 0.2rem 0.5rem; font-size: 0.625rem; }

/* ── Forms ── */
.panel-description { font-size: 0.6875rem; color: var(--text-2); margin-bottom: 0.625rem; }
.form-group { margin-bottom: 0.625rem; }
.form-group label {
    display: block; font-size: 0.5625rem;
    text-transform: uppercase; font-weight: 600;
    letter-spacing: 0.04em; color: var(--text-2);
    margin-bottom: 0.25rem; font-family: var(--font-mono);
}
.form-control {
    width: 100%; background: var(--surface-0);
    border: 1px solid var(--border-default); color: var(--text-0);
    padding: 0.375rem 0.5rem; border-radius: 4px;
    font-family: var(--font-sans); font-size: 0.75rem;
    transition: border-color var(--dur);
}
.form-control:focus { outline: none; border-color: var(--accent); }

.checkbox-group { display: grid; grid-template-columns: 1fr 1fr; gap: 0.25rem; }
.checkbox-item {
    display: flex; align-items: center; gap: 0.25rem;
    padding: 0.25rem 0.375rem;
    background: var(--surface-0); border: 1px solid var(--border-subtle);
    border-radius: 3px; cursor: pointer;
    font-size: 0.625rem; font-weight: 500; color: var(--text-2);
    transition: border-color var(--dur), color var(--dur);
}
.checkbox-item:hover { border-color: var(--border-strong); color: var(--text-0); }
.checkbox-item input { accent-color: var(--accent); width: 12px; height: 12px; }

/* ── Tables ── */
.table-responsive { overflow-x: auto; }
.explorer-sections { display: flex; flex-direction: column; gap: 1.25rem; }
.explorer-col h4 {
    font-size: 0.6875rem; color: var(--text-2);
    margin-bottom: 0.375rem; text-transform: uppercase;
    letter-spacing: 0.04em; font-family: var(--font-mono);
}
.data-table { width: 100%; border-collapse: collapse; font-size: 0.6875rem; text-align: left; }
.data-table th, .data-table td { padding: 0.375rem 0.625rem; border-bottom: 1px solid var(--border-subtle); }
.data-table th {
    background: var(--surface-2); color: var(--text-2);
    font-weight: 600; text-transform: uppercase;
    font-size: 0.5625rem; letter-spacing: 0.04em; font-family: var(--font-mono);
}
.data-table tr:hover { background: rgba(255,255,255,0.01); }
.badge {
    display: inline-block; padding: 0.1rem 0.3rem;
    background: var(--surface-3); border-radius: 3px;
    font-size: 0.625rem; font-family: var(--font-mono); color: var(--text-1);
}

/* ── Parameters ── */
.parameter-badge-group { display: flex; gap: 0.375rem; margin-top: 0.625rem; }
.parameter-badge {
    background: var(--surface-2); border: 1px solid var(--border-subtle);
    padding: 0.375rem 0.5rem; border-radius: 4px;
    display: flex; flex-direction: column; align-items: center; flex-grow: 1;
}
.param-name { font-size: 0.5rem; color: var(--text-2); text-transform: uppercase; font-family: var(--font-mono); }
.param-val { font-size: 0.8125rem; font-weight: 700; color: var(--text-0); font-family: var(--font-mono); }
.system-explainer { max-width: 460px; margin: 0 auto; }
.system-explainer h4 { margin-bottom: 0.375rem; }
.system-explainer p { font-size: 0.6875rem; color: var(--text-2); line-height: 1.5; }

/* ═══════════════════════════════════════════════
   ESCALATION (intervention) extra styles
   ═══════════════════════════════════════════════ */
.bg-warning { background: rgba(251,191,36,0.04) !important; border-bottom-color: rgba(251,191,36,0.12) !important; }
.warning-title { color: var(--signal-warn) !important; }
.bg-dark-tint { background: rgba(0,0,0,0.1); }

.brief-meta { display: grid; grid-template-columns: 1fr 1fr; gap: 0.5rem; margin-bottom: 0.5rem; border-bottom: 1px solid var(--border-subtle); padding-bottom: 0.5rem; }
.meta-field { display: flex; flex-direction: column; }
.meta-field .lbl { font-size: 0.5rem; color: var(--text-2); text-transform: uppercase; font-family: var(--font-mono); letter-spacing: 0.04em; }
.meta-field .val { font-size: 0.75rem; font-weight: 600; }

.brief-desc { font-size: 0.6875rem; color: var(--text-1); margin-bottom: 0.5rem; line-height: 1.4; }
.brief-ai-exp { background: var(--surface-0); border: 1px solid var(--border-subtle); border-radius: 3px; padding: 0.5rem; font-size: 0.625rem; color: var(--text-2); margin-bottom: 0.625rem; }
.brief-options-title { font-size: 0.5625rem; text-transform: uppercase; font-weight: 700; color: var(--text-2); margin-bottom: 0.25rem; font-family: var(--font-mono); }
.intervention-options { display: flex; flex-direction: column; gap: 0.375rem; margin-bottom: 0.625rem; }

.opt-card { border: 1px solid var(--border-default); border-radius: 3px; padding: 0.5rem; background: var(--surface-0); cursor: pointer; transition: border-color var(--dur); }
.opt-card:hover { border-color: var(--border-strong); }
.opt-card.selected { border-color: var(--accent); background: var(--accent-dim); }

.opt-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 0.1rem; }
.opt-title { font-weight: 600; font-size: 0.6875rem; color: var(--text-0); }
.opt-badges { display: flex; gap: 0.2rem; }
.opt-badge { font-size: 0.5rem; font-weight: 600; font-family: var(--font-mono); padding: 0.1rem 0.25rem; border-radius: 2px; }
.opt-badge.confidence { background: var(--accent-dim); color: var(--accent); }
.opt-badge.reduction { background: rgba(52,211,153,0.08); color: var(--signal-ok); }
.opt-desc { font-size: 0.625rem; color: var(--text-2); }

/* ═══════════════════════════════════════════════
   DRAWER
   ═══════════════════════════════════════════════ */
.drawer {
    position: fixed; top: 0; right: -460px; width: 460px;
    height: 100vh; background: var(--surface-1);
    border-left: 1px solid var(--border-default);
    box-shadow: -6px 0 24px rgba(0,0,0,0.4);
    z-index: 100; display: flex; flex-direction: column;
    transition: right 0.3s var(--ease);
}
.drawer.open { right: 0; }

.drawer-header {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border-subtle);
    display: flex; justify-content: space-between; align-items: center;
    flex-shrink: 0; background: var(--surface-2);
}
.drawer-pre-title { font-size: 0.5rem; font-weight: 600; color: var(--accent); letter-spacing: 0.06em; text-transform: uppercase; font-family: var(--font-mono); }
.drawer-title { font-size: 1rem; font-weight: 700; color: var(--text-0); }

.btn-close { background: none; border: none; color: var(--text-2); font-size: 0.875rem; cursor: pointer; padding: 0.2rem; }
.btn-close:hover { color: var(--text-0); }

.drawer-body { flex-grow: 1; overflow-y: auto; padding: 1rem 1.25rem; }
.drawer-loading { display: flex; flex-direction: column; align-items: center; justify-content: center; height: 100%; gap: 0.625rem; color: var(--text-2); font-size: 0.75rem; }
.drawer-loading i { font-size: 1.25rem; color: var(--accent); }

.detail-section { margin-bottom: 1.25rem; border-bottom: 1px solid var(--border-subtle); padding-bottom: 1rem; }
.detail-section h3, .detail-section h4 { font-size: 0.6875rem; margin-bottom: 0.375rem; text-transform: uppercase; letter-spacing: 0.04em; color: var(--text-1); font-family: var(--font-mono); }
.section-desc { font-size: 0.625rem; color: var(--text-2); margin-bottom: 0.375rem; }

.overview-metric-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0.5rem; }
.overview-metric { background: var(--surface-2); border: 1px solid var(--border-subtle); border-radius: 3px; padding: 0.5rem; display: flex; flex-direction: column; }
.overview-metric .m-label { font-size: 0.5rem; color: var(--text-2); font-family: var(--font-mono); text-transform: uppercase; }
.overview-metric .m-value { font-size: 0.9375rem; font-weight: 700; font-family: var(--font-mono); }

.red-text { color: var(--signal-danger); }
.text-success { color: var(--signal-ok); }
.text-muted { color: var(--text-2); }

.explanation-box { background: var(--surface-2); border: 1px solid var(--border-subtle); border-radius: 3px; padding: 0.75rem; font-size: 0.6875rem; color: var(--text-1); line-height: 1.5; }
.section-title-highlight { display: flex; align-items: center; gap: 0.3rem; margin-bottom: 0.375rem; }
.text-magic { color: var(--accent); }

.cascade-visualization-container { display: flex; flex-direction: column; gap: 0.25rem; }
.cascade-row { display: flex; justify-content: space-between; align-items: center; background: var(--surface-2); padding: 0.3rem 0.5rem; border-radius: 3px; font-size: 0.625rem; border: 1px solid var(--border-subtle); font-family: var(--font-mono); }
.cascade-node-id { font-weight: 600; color: var(--text-0); }
.cascade-step-p { display: flex; gap: 0.3rem; }
.step-prob { background: var(--surface-3); border-radius: 2px; padding: 0.075rem 0.25rem; font-size: 0.5rem; font-family: var(--font-mono); }
.step-prob.high   { background: rgba(239,68,68,0.1); color: var(--signal-danger); }
.step-prob.medium { background: rgba(251,191,36,0.1); color: var(--signal-warn); }
.step-prob.low    { background: rgba(52,211,153,0.1); color: var(--signal-ok); }

.resolution-badge { background: rgba(52,211,153,0.06); color: var(--signal-ok); padding: 0.15rem 0.5rem; border-radius: 3px; display: inline-block; font-weight: 700; font-size: 0.5625rem; font-family: var(--font-mono); margin-bottom: 0.375rem; }
.resolution-logs-box { background: var(--surface-0); border: 1px solid var(--border-subtle); border-radius: 3px; padding: 0.5rem; font-family: var(--font-mono); font-size: 0.625rem; color: var(--text-2); max-height: 120px; overflow-y: auto; }

/* ═══════════════════════════════════════════════
   TOASTS
   ═══════════════════════════════════════════════ */
.toast-container { position: fixed; bottom: 1rem; right: 1rem; display: flex; flex-direction: column; gap: 0.375rem; z-index: 1000; }

.toast {
    background: var(--surface-3); border: 1px solid var(--border-default);
    border-left: 3px solid var(--accent); border-radius: 4px;
    padding: 0.625rem 0.75rem;
    display: flex; align-items: center; gap: 0.5rem;
    box-shadow: 0 6px 20px rgba(0,0,0,0.35);
    min-width: 260px; max-width: 340px;
    transform: translateX(120%); opacity: 0;
    transition: transform 0.3s var(--ease), opacity 0.2s;
}
.toast.show { transform: translateX(0); opacity: 1; }
.toast.success { border-left-color: var(--signal-ok); }
.toast.error   { border-left-color: var(--signal-danger); }
.toast.info    { border-left-color: var(--signal-info); }
.toast.warning { border-left-color: var(--signal-warn); }

.toast-icon { font-size: 0.8125rem; }
.toast.success .toast-icon { color: var(--signal-ok); }
.toast.error .toast-icon   { color: var(--signal-danger); }
.toast.info .toast-icon    { color: var(--signal-info); }
.toast.warning .toast-icon { color: var(--signal-warn); }

.toast-content { display: flex; flex-direction: column; gap: 1px; }
.toast-title { font-weight: 600; font-size: 0.6875rem; color: var(--text-0); }
.toast-desc { font-size: 0.625rem; color: var(--text-2); }

/* ═══════════════════════════════════════════════
   ANIMATIONS
   ═══════════════════════════════════════════════ */
.flashing-orange { animation: oflash 1.2s ease infinite alternate; }
@keyframes oflash { 0%{opacity:.5;color:var(--signal-warn)} 100%{opacity:1;color:var(--signal-danger)} }

.flashing { animation: sflash 1.2s ease infinite alternate; }
@keyframes sflash { 0%{opacity:.4} 100%{opacity:1} }

@keyframes fadeInUp { from{opacity:0;transform:translateY(8px)} to{opacity:1;transform:translateY(0)} }
.animate-fade-in-up { animation: fadeInUp 0.35s var(--ease) both; }

/* ── Tabs ── */
.tab-content { display: none !important; height: 100%; }
.tab-content.active { display: flex !important; }

/* Markdown */
.markdown-body ul { padding-left: 1rem; margin: 0.25rem 0; }
.markdown-body li { margin-bottom: 0.1rem; }
.markdown-body strong { color: var(--text-0); }

/* Chart container */
.chart-container { background: var(--surface-0); border: 1px solid var(--border-subtle); border-radius: 3px; padding: 0.5rem; }

/* Misc */
.text-center-vertical { display: flex; align-items: center; justify-content: center; }
.cursor-pointer { cursor: pointer; }

/* Scrollbar */
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-strong); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-2); }

/* ═══════════════════════════════════════════════
   TRAIN TELEMETRY TAB (NEW)
   ═══════════════════════════════════════════════ */
.telemetry-grid {
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: 0.625rem;
    height: 100%;
    min-height: 0;
}

.fleet-panel {
    height: 100%;
}

.fleet-list {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    overflow-y: auto;
    height: 100%;
    padding-right: 0.25rem;
}

.fleet-item {
    background: var(--surface-2);
    border: 1px solid var(--border-default);
    border-radius: 5px;
    padding: 0.625rem;
    cursor: pointer;
    transition: all var(--dur) var(--ease);
}

.fleet-item:hover {
    background: var(--surface-3);
    border-color: var(--border-strong);
}

.fleet-item.active {
    border-color: var(--accent);
    background: var(--accent-dim);
}

.fleet-item-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.25rem;
}

.fleet-item-id {
    font-weight: 700;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-0);
}

.fleet-item-status {
    font-size: 0.5625rem;
    font-family: var(--font-mono);
    padding: 0.1rem 0.35rem;
    border-radius: 3px;
    font-weight: 600;
}

.fleet-item-status.ok {
    background: rgba(52,211,153,0.08);
    color: var(--signal-ok);
}

.fleet-item-status.warning {
    background: rgba(251,191,36,0.08);
    color: var(--signal-warn);
}

.fleet-item-status.danger {
    background: rgba(239,68,68,0.08);
    color: var(--signal-danger);
    animation: sflash 1.2s ease infinite alternate;
}

.fleet-item-desc {
    font-size: 0.625rem;
    color: var(--text-2);
}

/* Diagnostics Panel */
.diagnostics-panel {
    height: 100%;
    display: flex;
    flex-direction: column;
}

.diagnostics-body {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    flex: 1;
    min-height: 0;
    overflow-y: auto;
}

.diag-header-meta {
    display: flex;
    gap: 0.375rem;
}

.diag-badge {
    font-size: 0.625rem;
    font-family: var(--font-mono);
    padding: 0.15rem 0.45rem;
    border-radius: 3px;
    font-weight: 600;
    text-transform: uppercase;
}

.diag-badge.info {
    background: var(--accent-dim);
    color: var(--accent);
    border: 1px solid rgba(79,143,247,0.2);
}

.diag-badge.ok {
    background: rgba(52,211,153,0.08);
    color: var(--signal-ok);
    border: 1px solid rgba(52,211,153,0.15);
}

.diag-badge.warning {
    background: rgba(251,191,36,0.08);
    color: var(--signal-warn);
    border: 1px solid rgba(251,191,36,0.15);
}

.diag-badge.danger {
    background: rgba(239,68,68,0.08);
    color: var(--signal-danger);
    border: 1px solid rgba(239,68,68,0.15);
}

/* SVG Schematic */
.schematic-wrapper {
    background: var(--surface-0);
    border: 1px solid var(--border-subtle);
    border-radius: 6px;
    padding: 1rem;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-shrink: 0;
}

.train-svg {
    width: 100%;
    max-width: 540px;
    height: auto;
}

.wheel-group {
    cursor: pointer;
}

.wheel-rim {
    fill: var(--surface-3);
    stroke: var(--border-strong);
    stroke-width: 1.5;
    transition: all var(--dur) var(--ease);
}

.wheel-group:hover .wheel-rim {
    stroke: var(--text-1);
    fill: var(--surface-raised);
}

.wheel-group.active .wheel-rim {
    stroke: var(--accent);
    fill: var(--accent-dim);
    filter: drop-shadow(0 0 3px rgba(79,143,247,0.4));
}

.wheel-group.anomalous .wheel-rim {
    stroke: var(--signal-danger) !important;
    fill: rgba(239, 68, 68, 0.12) !important;
    filter: drop-shadow(0 0 5px var(--signal-danger));
    animation: wheel-blink 1s ease infinite alternate;
}

@keyframes wheel-blink {
    0% { opacity: 0.6; }
    100% { opacity: 1; }
}

.wheel-hub {
    fill: var(--text-2);
    transition: fill var(--dur);
}

.wheel-group:hover .wheel-hub {
    fill: var(--text-0);
}

.wheel-group.active .wheel-hub {
    fill: var(--accent);
}

.wheel-group.anomalous .wheel-hub {
    fill: var(--signal-danger) !important;
}

.spinning .wheel-rim {
    animation: spin 1.5s linear infinite;
    transform-box: fill-box;
    transform-origin: center;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* Telemetry Readout Grid */
.telemetry-readouts {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 0.5rem;
    flex-shrink: 0;
}

.tel-card {
    background: var(--surface-2);
    border: 1px solid var(--border-default);
    border-radius: 5px;
    padding: 0.625rem;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.tel-label {
    font-size: 0.5625rem;
    color: var(--text-2);
    text-transform: uppercase;
    font-family: var(--font-mono);
    letter-spacing: 0.04em;
}

.tel-value {
    font-size: 0.8125rem;
    font-weight: 700;
}

.tel-value-group {
    display: flex;
    align-items: baseline;
    gap: 0.15rem;
}

.tel-val {
    font-size: 0.9375rem;
    font-weight: 700;
    font-family: var(--font-mono);
    color: var(--text-0);
}

.tel-unit {
    font-size: 0.5625rem;
    color: var(--text-2);
    font-family: var(--font-mono);
}

.tel-bar-wrapper {
    height: 3px;
    background: var(--surface-0);
    border-radius: 1px;
    overflow: hidden;
    margin-top: 0.15rem;
}

.tel-bar-fill {
    height: 100%;
    background: var(--accent);
    border-radius: 1px;
    width: 0%;
    transition: width 0.4s var(--ease);
}

.tel-bar-fill.warning {
    background: var(--signal-warn);
}

.tel-bar-fill.danger {
    background: var(--signal-danger);
}

/* Diagnostic Feedback Block */
.diagnostics-log-card {
    background: rgba(255, 255, 255, 0.015);
    border: 1px solid var(--border-subtle);
    border-radius: 5px;
    padding: 0.75rem;
    flex-grow: 1;
    min-height: 80px;
}

.diag-log-title {
    font-size: 0.625rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    color: var(--text-1);
    margin-bottom: 0.35rem;
    font-family: var(--font-mono);
}

.diag-log-desc {
    font-size: 0.6875rem;
    color: var(--text-2);
    line-height: 1.5;
}