:root {
    --bg: #1e1e1e;
    --panel: #252526;
    --surface: #2d2d2d;
    --border: #3c3c3c;
    --text: #d4d4d4;
    --muted: #9a9a9a;
    --accent: #4263eb;
    --aorta: #d81b1b;
    --vena: #1a73e8;
    --discard: #8a8a8a;
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    height: 100%;
    background: var(--bg);
    color: var(--text);
    font-family: sans-serif;
    font-size: 13px;
    overflow: hidden;
}

#app {
    display: flex;
    height: 100vh;
}

aside {
    width: 340px;
    flex: 0 0 auto;
    padding: 12px;
    overflow-y: auto;
    background: var(--panel);
}

#left {
    border-right: 1px solid var(--border);
}

#right {
    width: 360px;
    border-left: 1px solid var(--border);
}

h3,
h4 {
    margin: 0 0 8px;
}

hr {
    border: none;
    border-top: 1px solid var(--border);
    margin: 12px 0;
}

label {
    display: block;
    margin-bottom: 4px;
}

.row {
    display: flex;
    gap: 6px;
    margin-bottom: 6px;
    align-items: center;
}

.grow,
.wide {
    flex: 1;
}

.wide {
    width: 100%;
    display: block;
    margin-bottom: 6px;
}

.hidden {
    display: none !important;
}

.muted {
    color: var(--muted);
    font-size: 12px;
}

.hint {
    color: var(--muted);
    font-size: 12px;
    margin: 6px 0;
}

button,
select,
input[type="text"] {
    background: var(--surface);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 5px 8px;
    font-size: 13px;
    font-family: inherit;
}

#readout-select {
    margin-top: 6px;
}


select {
    margin-bottom: 6px;
}

button {
    cursor: pointer;
}

button:hover {
    background: #383838;
}

button:disabled {
    opacity: 0.4;
    cursor: default;
    background: var(--surface);
}

button.active {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
}

button.save {
    background: #12b886;
    border: none;
    color: #fff;
    padding: 8px;
}

button.danger {
    background: #e03131;
    border: none;
    color: #fff;
}

button.lbl-aorta {
    background: var(--aorta);
    border: none;
    color: #fff;
}

button.lbl-vena {
    background: var(--vena);
    border: none;
    color: #fff;
}

button.lbl-discard {
    background: var(--discard);
    border: none;
    color: #fff;
}

select,
input[type="text"] {
    width: 100%;
}

#show-opts label {
    display: block;
    margin-bottom: 3px;
}

#show-opts input {
    margin-right: 6px;
}

.panel {
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 8px;
    margin-top: 6px;
}

pre {
    white-space: pre-wrap;
    word-break: break-all;
    margin: 6px 0 0;
    font-family: inherit;
}

#status {
    color: var(--text);
    min-height: 2em;
}

#centre {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
}

#centre-bar {
    flex: 0 0 auto;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 12px;
    padding: 6px;
    border-bottom: 1px solid var(--border);
}

.badge {
    background: #b8860b;
    color: #fff;
    border-radius: 3px;
    padding: 2px 8px;
    font-size: 12px;
}

#view-stack {
    flex: 1 1 auto;
    position: relative;
    min-height: 0;
}

#graph3d {
    position: absolute;
    inset: 0;
}

#slice-wrap {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
}

#slice-bar {
    flex: 0 0 auto;
    display: flex;
    gap: 6px;
    align-items: center;
    padding: 4px 8px;
    border-bottom: 1px solid var(--border);
}

#slice-bar select {
    width: 220px;
}

#slice-canvas {
    flex: 1 1 auto;
    min-height: 0;
    display: block;
    width: 100%;
    cursor: crosshair;
}

#slice-note {
    flex: 0 0 auto;
    padding: 4px 8px;
    color: var(--muted);
    font-size: 12px;
}

#patch-canvas {
    width: 100%;
    margin-top: 10px;
    background: #000;
    border: 1px solid var(--border);
}

.slider {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--muted);
}

.slider input {
    flex: 1;
}

#ctx-menu {
    position: fixed;
    z-index: 1000;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 6px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
}

#ctx-menu button {
    display: block;
    width: 100%;
    text-align: left;
    margin-bottom: 2px;
}

#busy {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.55);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    z-index: 2000;
}

.spinner {
    width: 22px;
    height: 22px;
    border: 3px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* --- per-node training features ----------------------------------------- */
#node-feats:empty {
    display: none;
}

#node-feats {
    margin-top: 2px;
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 6px 8px;
}

.feat-toggle {
    display: block;
    width: 100%;
    margin-top: 8px;
    padding: 3px 0;
    text-align: left;
    background: none;
    border: none;
    color: var(--muted);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.feat-toggle:hover {
    background: none;
    color: var(--text);
}

.feat-stale {
    color: #d9a441;
    font-size: 11px;
    margin-bottom: 5px;
}

.feat-grid {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 1px 10px;
    font-size: 12px;
}

.feat-name {
    color: var(--muted);
}

.feat-val {
    text-align: right;
    font-variant-numeric: tabular-nums;
}

/* --- session gate ------------------------------------------------------- */
.gate {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.72);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 3000;
}

.gate-card {
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 22px 24px;
    width: 360px;
    max-width: 90vw;
}

.gate-card h2 {
    margin: 0 0 6px;
    font-size: 17px;
}

.gate-card p {
    color: var(--muted);
    margin: 0 0 14px;
    line-height: 1.45;
}

.gate-card input {
    width: 100%;
    margin-bottom: 10px;
    font-size: 14px;
    padding: 7px 8px;
}

.gate-error {
    color: #ff6b6b;
    margin-top: 8px;
}

.gate-error.hidden {
    display: none;
}

/* --- revision log ------------------------------------------------------- */
.chip {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 1px 8px;
    margin-left: 6px;
    font-weight: normal;
    font-size: 11px;
    color: var(--muted);
    cursor: pointer;
}

.chip:hover {
    color: var(--text);
    border-color: var(--accent);
}

#note-input {
    width: 100%;
    resize: vertical;
    background: var(--surface);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 3px;
    padding: 5px 6px;
    font-family: inherit;
    font-size: 12px;
}

.revlog {
    max-height: 190px;
    overflow-y: auto;
    margin-top: 6px;
}

.rev {
    border-left: 2px solid var(--border);
    padding: 3px 0 5px 7px;
    margin-bottom: 5px;
}

.rev:first-child {
    border-left-color: var(--accent);
}

.rev-head {
    display: flex;
    justify-content: space-between;
    gap: 6px;
}

.rev-who {
    font-weight: bold;
}

.rev-when,
.rev-sum {
    color: var(--muted);
    font-size: 11px;
}

.rev-note {
    margin-top: 2px;
    white-space: pre-wrap;
    word-break: break-word;
}

.rev-empty {
    padding: 4px 0;
}
/* --- account bar (editor) ----------------------------------------------- */
#account-bar {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 10px;
}

#account-bar h3 {
    margin: 0;
    flex: 1;
}

#account-bar #who-chip {
    margin-left: 0;
    max-width: 120px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

#admin-link {
    color: var(--muted);
    text-decoration: none;
    font-size: 15px;
    padding: 2px 4px;
}

#admin-link:hover {
    color: var(--text);
}

#admin-link.hidden {
    display: none;
}

/* --- admin panel --------------------------------------------------------- */
.admin-body {
    overflow: auto;
}

#admin {
    max-width: 1180px;
    margin: 0 auto;
    padding: 18px 22px 40px;
}

#admin-head {
    display: flex;
    align-items: baseline;
    gap: 12px;
    border-bottom: 1px solid var(--border);
    padding-bottom: 10px;
    margin-bottom: 16px;
}

#admin-head h2 {
    margin: 0;
}

#admin-head .spacer {
    flex: 1;
}

.btn-link {
    color: var(--muted);
    text-decoration: none;
}

.btn-link:hover {
    color: var(--text);
}

#admin-cols {
    display: grid;
    grid-template-columns: minmax(320px, 1fr) minmax(340px, 1fr);
    gap: 26px;
    align-items: start;
}

@media (max-width: 860px) {
    #admin-cols {
        grid-template-columns: 1fr;
    }
}

.user-row {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 5px 6px;
    border: 1px solid var(--border);
    border-radius: 4px;
    margin-bottom: 5px;
    background: var(--panel);
}

.user-row.active {
    border-color: #4263eb;
}

.user-name {
    flex: 1;
    text-align: left;
    background: none;
    border: none;
    color: var(--text);
    font-size: 13px;
    cursor: pointer;
    padding: 2px 0;
}

.user-name:hover {
    text-decoration: underline;
}

.user-tag {
    font-size: 11px;
    white-space: nowrap;
}

.picker {
    border: 1px solid var(--border);
    border-radius: 4px;
    background: var(--panel);
    max-height: 260px;
    overflow: auto;
    padding: 4px 6px;
    margin-bottom: 12px;
}

.check {
    display: block;
    font-size: 12px;
    padding: 2px 0;
    cursor: pointer;
    word-break: break-all;
}

.pad {
    padding: 6px 2px;
}

#admin-status.bad {
    color: #ff6b6b;
}