/* ============================================================
   ODE 3D Orbit — dashboard theme
   Navy ground, cyan data accent, rounded cards around a
   centered live viewport. Mono for data, sans for prose.
   ============================================================ */

:root {
    --bg: #05080f;
    --panel: #0b1322;
    --panel-2: #0e1830;
    --well: #060b16;
    --border: #1d2a4a;
    --border-soft: #16213c;

    --text: #e8eefc;
    --text-2: #9db0d4;
    --text-3: #7387b0;

    --accent: #4cc3ff;
    --accent-deep: #2f7bff;
    --good: #3fd68f;
    --warn: #f5c542;
    --bad: #ff6b6b;
    --live: #ff5c1a;

    --font-sans: "Fira Sans", -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: "Fira Code", ui-monospace, monospace;

    --bar-h: 52px;
    --radius: 10px;
    --radius-sm: 6px;

    color-scheme: dark;
}

/* Fira Code ligatures would misrepresent literal equation symbols */
input[type="text"], textarea, .tok, .note-line, .eq-row, .mapping-badge {
    font-variant-ligatures: none;
}

* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
}

body {
    display: flex;
    flex-direction: column;
    background:
        radial-gradient(1100px 500px at 50% -10%, #0a1226 0%, transparent 60%),
        var(--bg);
    color: var(--text);
    font-family: var(--font-sans);
    -webkit-font-smoothing: antialiased;
    user-select: none;
}

::selection {
    background: var(--accent);
    color: #04101f;
}

/* ---------- Scrollbars ---------- */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 3px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--accent);
}

/* ---------- Focus ---------- */
:focus { outline: none; }
:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 1px;
}

/* ---------- Shared bits ---------- */
.row-between {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
}

.stack { display: flex; flex-direction: column; gap: 10px; }
.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

.field-label {
    display: block;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--text-2);
}

.value, .value-accent {
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: 600;
    font-variant-numeric: tabular-nums;
}
.value { color: var(--text); min-width: 4ch; text-align: right; display: inline-block; }
.value-accent { color: var(--accent); width: 56px; text-align: right; }

.prose {
    margin: 0;
    font-size: 12px;
    line-height: 1.5;
    color: var(--text-2);
}

.tok { font-family: var(--font-mono); font-size: 11px; color: var(--text); }
.tok-accent { color: var(--accent); }

.note {
    background: var(--well);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius-sm);
    padding: 8px 10px;
    display: flex;
    flex-direction: column;
    gap: 5px;
}
.note.hidden { display: none; }
.note-accent {
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--accent);
}
.note-dim { font-family: var(--font-mono); font-size: 11px; color: var(--text-3); }
.note-line {
    font-family: var(--font-mono);
    font-size: 11px;
    line-height: 1.6;
    color: var(--text-2);
}
.note-line sub { font-size: 10px; }

kbd {
    font-family: var(--font-mono);
    font-size: 10px;
    color: var(--text-3);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 0 4px;
}

/* ---------- Buttons ---------- */
.btn {
    appearance: none;
    background: var(--panel-2);
    border: 1px solid var(--border);
    color: var(--text);
    font-family: var(--font-mono);
    font-size: 11.5px;
    letter-spacing: 0.03em;
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background-color 140ms ease, border-color 140ms ease, color 140ms ease;
}
.btn:hover {
    background: #142042;
    border-color: #2c3d6e;
}
.btn:active { background: #1a2a55; }

.btn.active {
    background: var(--accent);
    border-color: var(--accent);
    color: #04101f;
    font-weight: 600;
}

.btn-sm { padding: 4px 10px; font-size: 11px; }
.btn-block { width: 100%; padding: 9px 10px; font-size: 12px; }

/* ---------- App bar ---------- */
.app-bar {
    height: var(--bar-h);
    flex-shrink: 0;
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    background: rgba(11, 19, 34, 0.85);
    border-bottom: 1px solid var(--border-soft);
    padding: 0 14px;
    z-index: 30;
    gap: 10px;
}

.bar-side { display: flex; align-items: center; gap: 12px; min-width: 0; }
.bar-right { justify-content: flex-end; }

.bar-label {
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--text-3);
}

.run-dot {
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--live);
    box-shadow: 0 0 8px rgba(255, 92, 26, 0.7);
    flex-shrink: 0;
}

.brand-lockup { display: flex; align-items: center; gap: 9px; }
.brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.brand-name {
    font-family: var(--font-mono);
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text);
}
.brand-sub { font-size: 11px; color: var(--text-3); }

.model-field { display: flex; align-items: center; gap: 8px; min-width: 0; }
.model-field select { max-width: 300px; }

.bar-transport { display: flex; gap: 6px; }

.bar-hint {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--text-3);
    white-space: nowrap;
}

/* ---------- Inputs ---------- */
input[type="number"], input[type="text"], textarea, select {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text);
    background: var(--well);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 5px 8px;
}

input[type="number"]:focus, input[type="text"]:focus, textarea:focus, select:focus {
    border-color: var(--accent);
}

input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button {
    -webkit-appearance: none;
    margin: 0;
}
input[type="number"] { -moz-appearance: textfield; appearance: textfield; }

.select-dark { cursor: pointer; }
.select-full { width: 100%; }

textarea {
    width: 100%;
    resize: vertical;
    line-height: 1.5;
}

input[type="checkbox"] {
    width: 14px;
    height: 14px;
    accent-color: var(--accent);
    cursor: pointer;
}

/* Range inputs */
input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    background: transparent;
    width: 100%;
    height: 18px;
    margin: 0;
    cursor: ew-resize;
}
input[type="range"]::-webkit-slider-runnable-track {
    width: 100%;
    height: 3px;
    border-radius: 2px;
    background: var(--border);
}
input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    height: 13px;
    width: 13px;
    border-radius: 50%;
    background: var(--accent);
    margin-top: -5px;
    border: 2px solid #04101f;
    box-shadow: 0 0 6px rgba(76, 195, 255, 0.5);
}
input[type="range"]:hover::-webkit-slider-thumb {
    background: #7ad4ff;
}
input[type="range"]::-moz-range-track {
    width: 100%;
    height: 3px;
    border-radius: 2px;
    background: var(--border);
}
input[type="range"]::-moz-range-thumb {
    height: 13px;
    width: 13px;
    border-radius: 50%;
    background: var(--accent);
    border: 2px solid #04101f;
}
input[type="range"]:hover::-moz-range-thumb {
    background: #7ad4ff;
}

/* ---------- Error banner ---------- */
.error-banner {
    flex-shrink: 0;
    background: rgba(255, 107, 107, 0.12);
    border-bottom: 1px solid var(--bad);
    padding: 7px 14px;
    font-family: var(--font-mono);
    font-size: 11.5px;
    color: var(--bad);
    display: flex;
    align-items: baseline;
    gap: 8px;
}
.error-banner.hidden { display: none; }
.error-title { font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em; flex-shrink: 0; }

/* ---------- Dashboard grid ---------- */
.dash {
    flex: 1;
    min-height: 0;
    display: grid;
    grid-template-columns: 320px minmax(0, 1fr) 320px;
    gap: 12px;
    padding: 12px;
}

.col {
    display: flex;
    flex-direction: column;
    gap: 12px;
    overflow-y: auto;
    min-height: 0;
    padding-right: 2px;
}
/* Leftover column height spreads across the cards */
.col > .card { flex: 1 0 auto; }
.col > .card.collapsed { flex: 0 0 auto; }

.center {
    display: flex;
    flex-direction: column;
    gap: 12px;
    min-width: 0;
    min-height: 0;
}

/* ---------- Cards ---------- */
.card {
    background: linear-gradient(180deg, rgba(20, 32, 60, 0.5), rgba(11, 19, 34, 0.9) 40%);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 12px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    flex-shrink: 0;
}

.card-head {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    gap: 8px;
    padding-bottom: 8px;
    border-bottom: 1px solid var(--border-soft);
}

.card-toggle {
    appearance: none;
    background: transparent;
    border: none;
    width: 22px;
    height: 22px;
    border-radius: 5px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--text-3);
    flex-shrink: 0;
}
.card-toggle:hover { color: var(--accent); background: var(--panel-2); }
.card-toggle::before {
    content: '';
    width: 7px;
    height: 7px;
    border-right: 1.5px solid currentColor;
    border-bottom: 1.5px solid currentColor;
    transform: rotate(45deg) translate(-1px, -1px);
    transition: transform 140ms ease;
}
.card.collapsed .card-toggle::before {
    transform: rotate(-45deg) translate(-1px, -1px);
}
.card.collapsed > :not(.card-head) { display: none; }
.card.collapsed { gap: 0; padding-bottom: 12px; }

.card-head h2 {
    margin: 0 auto 0 0;
    cursor: pointer;
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.09em;
    text-transform: uppercase;
    color: var(--text);
    display: flex;
    align-items: center;
    gap: 7px;
}

.card-head h2::before {
    content: "";
    width: 3px;
    height: 11px;
    border-radius: 2px;
    background: var(--accent);
    box-shadow: 0 0 6px rgba(76, 195, 255, 0.6);
}

.card-tag {
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 600;
    color: var(--accent);
    background: rgba(76, 195, 255, 0.1);
    border: 1px solid rgba(76, 195, 255, 0.25);
    border-radius: 4px;
    padding: 2px 7px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 200px;
}

.field-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    margin-top: 2px;
}
.field-head .field-label { color: var(--text-2); }
.field-head label { color: var(--text); }
.field-head .note-dim { margin-left: auto; }

/* N stepper */
.n-stepper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    background: var(--well);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius-sm);
    padding: 8px 10px;
}
.n-stepper .field-label { margin: 0; }
.stepper-controls { display: flex; align-items: center; gap: 4px; }
.stepper-controls input[type="number"] {
    width: 48px;
    text-align: center;
    font-weight: 600;
    color: var(--accent);
}

/* Equations list */
.equations-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
    max-height: 240px;
    overflow-y: auto;
    padding-right: 3px;
}

.eq-row {
    display: flex;
    align-items: stretch;
    background: var(--well);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius-sm);
}
.eq-row:focus-within { border-color: var(--accent); }

.eq-name {
    display: flex;
    align-items: center;
    background: var(--panel-2);
    border-right: 1px solid var(--border-soft);
    padding: 0 8px;
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-2);
    flex-shrink: 0;
    border-radius: var(--radius-sm) 0 0 var(--radius-sm);
}
.eq-name input {
    width: 34px;
    background: transparent;
    border: none;
    text-align: center;
    font-weight: 700;
    color: var(--accent);
    padding: 0;
}
.eq-row input.eq-expr {
    flex: 1;
    min-width: 0;
    background: transparent;
    border: none;
    padding: 6px 8px;
}
.eq-remove {
    appearance: none;
    background: transparent;
    border: none;
    border-left: 1px solid var(--border-soft);
    color: var(--text-3);
    font-size: 13px;
    padding: 0 9px;
    cursor: pointer;
}
.eq-remove:hover { color: var(--bad); }

/* Initial state grid */
.initial-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 6px;
    max-height: 132px;
    overflow-y: auto;
    padding-right: 3px;
}
.init-box {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--well);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius-sm);
    padding: 4px 8px;
    font-family: var(--font-mono);
    font-size: 12px;
}
.init-box:focus-within { border-color: var(--accent); }
.init-box .var-name { color: var(--text-2); }
.init-box .var-name sub { color: var(--text-3); }
.init-box input {
    width: 60px;
    background: transparent;
    border: none;
    text-align: right;
    padding: 0;
}

/* Parameter cards */
.param-card {
    background: var(--well);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius-sm);
    padding: 10px;
    font-family: var(--font-mono);
    display: flex;
    flex-direction: column;
    gap: 7px;
}
.param-card-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
}
.param-id { display: flex; align-items: center; gap: 6px; }

.scrub-label {
    font-size: 11px;
    font-weight: 700;
    color: var(--accent);
    background: var(--panel-2);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 2px 6px;
    cursor: ew-resize;
    user-select: none;
}

.param-name-input {
    width: 56px;
    background: var(--panel-2);
    padding: 2px 6px;
    font-size: 12px;
}
.param-num-input {
    width: 80px;
    background: var(--panel-2);
    text-align: right;
    font-weight: 600;
    color: var(--accent);
    font-size: 12px;
}
.param-range-row {
    display: flex;
    align-items: center;
    gap: 8px;
}
.param-bound {
    width: 48px;
    background: transparent;
    border: none;
    font-size: 11px;
    color: var(--text-3);
    padding: 0;
    font-family: var(--font-mono);
}
.param-bound:focus { color: var(--text); }
.param-bound:last-child { text-align: right; }
.param-slider { flex: 1; }

.step-btn { padding: 2px 7px; }
.param-remove { color: var(--text-3); }
.param-remove:hover { color: var(--bad); }

.params-empty {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--text-3);
    text-align: center;
    padding: 10px 0;
}

/* Generator + field boxes */
.field-box {
    background: var(--well);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius-sm);
    padding: 8px;
}
.field-box .select-dark, .field-box input {
    width: 100%;
    background: var(--panel-2);
}

.axis-x1 { color: var(--bad); }
.axis-x2 { color: var(--good); }
.axis-x3 { color: var(--warn); }
.axis-c  { color: var(--accent); }

/* View card button grids */
.btn-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 6px;
}
.btn-grid-3 { grid-template-columns: repeat(3, 1fr); }
.btn-grid .btn { text-align: center; }

/* Sliders */
.slider-box {
    background: var(--well);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius-sm);
    padding: 9px 10px;
    display: flex;
    flex-direction: column;
    gap: 5px;
}
.slider-head { margin-bottom: 0; }
.slider-head .field-label { margin: 0; }
.dt-controls { display: flex; align-items: center; gap: 4px; }

.toggle-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    font-size: 12px;
    color: var(--text-2);
    cursor: pointer;
    padding: 2px 2px 0;
}

/* ---------- Viewport ---------- */
.viewport {
    flex: 1;
    position: relative;
    background: var(--well);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    min-width: 0;
    min-height: 0;
}
.canvas-container { width: 100%; height: 100%; }
.canvas-container canvas { display: block; }

.stat-amber { color: var(--warn); }
.hud-row { display: flex; align-items: center; gap: 14px; white-space: nowrap; }
.hud-title { font-family: var(--font-mono); font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; color: var(--text); }
.hud-dim { font-family: var(--font-mono); color: var(--accent); font-weight: 600; font-size: 11px; }
.hud-stats { font-family: var(--font-mono); font-size: 11.5px; color: var(--text-2); font-variant-numeric: tabular-nums; flex-wrap: wrap; row-gap: 2px; }
.hud-stats strong { color: var(--text); font-weight: 600; }
.hud-invariants { font-family: var(--font-mono); font-size: 11.5px; color: var(--text-2); font-variant-numeric: tabular-nums; flex-wrap: wrap; row-gap: 2px; }
.hud-invariants strong { color: var(--text); font-weight: 600; }
.hud-invariants.hidden { display: none; }
.stat-green { color: var(--good); }
.stat-green { color: var(--good); }

.probe {
    position: absolute;
    top: 12px;
    right: 12px;
    pointer-events: none;
    font-family: var(--font-mono);
    font-size: 11px;
    background: rgba(6, 11, 22, 0.82);
    border: 1px solid var(--accent);
    border-radius: var(--radius-sm);
    padding: 6px 10px;
    font-variant-numeric: tabular-nums;
}
.probe.hidden { display: none; }
.probe-title { color: var(--accent); font-weight: 600; text-transform: uppercase; letter-spacing: 0.05em; }
.probe-coords { color: var(--text); margin-top: 2px; }

.gizmo-wrap {
    position: absolute;
    bottom: 12px;
    right: 12px;
    background: rgba(6, 11, 22, 0.75);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius-sm);
    padding: 4px;
    pointer-events: none;
}
.gizmo-wrap canvas { display: block; }

/* ---------- Fullscreen (zen) mode ---------- */
.fs-btn {
    position: absolute;
    top: 12px;
    right: 12px;
    z-index: 5;
    width: 30px;
    height: 30px;
    border-radius: 7px;
    border: 1px solid var(--border);
    background: rgba(6, 11, 22, 0.82);
    color: var(--text-2);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: color 140ms ease, border-color 140ms ease, background-color 140ms ease;
    backdrop-filter: blur(4px);
}
.fs-btn:hover { color: var(--accent); border-color: var(--accent); }
.fs-icon { width: 14px; height: 14px; display: block; }
.fs-compress { display: none; }
body.zen .fs-expand { display: none; }
body.zen .fs-compress { display: block; }
body.zen .fs-btn { color: var(--accent); border-color: var(--accent); }

body.zen .col-left,
body.zen .col-right,
body.zen .timeline-card { display: none; }
body.zen .dash { grid-template-columns: 1fr; padding: 12px; }
body.zen .center { height: 100%; }
@media (max-width: 900px) {
    body.zen .dash { display: block; }
    body.zen .viewport { height: calc(100vh - var(--bar-h) - 24px); }
}

/* hover probe sits below the fullscreen button */
.probe { top: 50px; right: 12px; }

/* ---------- Timeline card (also the info strip) ---------- */
.timeline-id {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-right: auto;
    min-width: 0;
}
.timeline-id .hud-title {
    font-size: 11.5px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.timeline-stats {
    display: flex;
    flex-direction: column;
    gap: 3px;
}
.timeline-card {
    gap: 8px;
    padding-bottom: 10px;
}

/* ---------- Timeline card ---------- */
.timeline-card {
    padding: 10px 14px 8px;
    gap: 6px;
}
.timeline-card input[type="range"] {
    height: 20px;
}
.timeline-card input[type="range"]::-webkit-slider-thumb {
    height: 15px;
    width: 15px;
}
.timeline-labels {
    font-size: 11px;
}

/* ---------- Scope card ---------- */
.scope-card {
    height: 150px;
    flex-shrink: 0;
    min-height: 0;
}
.scope-meta {
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--text-3);
    font-variant-numeric: tabular-nums;
    white-space: nowrap;
    overflow: hidden;
}
.meta-sep { color: var(--border); }
.scope-legend { display: flex; gap: 10px; }
.scope-legend span { display: inline-flex; align-items: center; }
.swatch { display: inline-block; width: 7px; height: 7px; border-radius: 2px; margin-right: 4px; }
.swatch-x1 { background: var(--bad); }
.swatch-x2 { background: var(--good); }
.swatch-x3 { background: var(--warn); }
.scope-canvas { flex: 1; width: 100%; min-height: 0; display: block; }

/* ---------- Responsive ---------- */
@media (max-width: 1280px) {
    .dash { grid-template-columns: 280px minmax(0, 1fr) 280px; }
}

@media (max-width: 1023px) {
    .bar-hint { display: none; }
}

@media (max-width: 900px) {
    html, body { overflow: auto; }
    body { height: auto; min-height: 100vh; }
    .dash {
        display: flex;
        flex-direction: column;
        height: auto;
    }
    .center { order: 0; }
    .col-left { order: 1; }
    .col-right { order: 2; }
    .col { overflow: visible; }
    .viewport { height: 56vh; flex: none; }
    .brand-sub, .brand-text { display: none; }
    .model-field select { max-width: 180px; }
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
    * { transition: none !important; }
}