/* Tokyo Night */
:root {
    --bg: #1a1b26;
    --bg-alt: #16161e;
    --panel: #24283b;
    --border: #3b4261;
    --fg: #c0caf5;
    --muted: #565f89;
    --blue: #7aa2f7;
    --green: #9ece6a;
    --red: #f7768e;
    --orange: #ff9e64;
    --purple: #bb9af7;
    --teal: #7dcfff;
    --topbar: 44px;
}

* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    height: 100%;
    background: var(--bg);
    color: var(--fg);
    font-family: -apple-system, "Segoe UI", Helvetica, Arial, sans-serif;
    font-size: 14px;
}

a {
    color: var(--blue);
    text-decoration: none;
    cursor: pointer;
}

a:hover {
    text-decoration: underline;
}

.topbar {
    height: var(--topbar);
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding: 0 1rem;
    background: var(--bg-alt);
    border-bottom: 1px solid var(--border);
}

.topbar .brand {
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--fg);
}

.topbar nav {
    display: flex;
    gap: 1rem;
    flex: 1;
}

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

main {
    height: calc(100% - var(--topbar));
}

.page {
    max-width: 960px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

.page-fill {
    height: 100%;
    display: flex;
    flex-direction: column;
}

.lead {
    font-size: 1.15rem;
}

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

.error {
    color: var(--red);
    white-space: pre-wrap;
}

.cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 1rem;
    margin-top: 2rem;
}

.card {
    display: block;
    padding: 1rem 1.25rem;
    background: var(--panel);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--fg);
}

.card:hover {
    border-color: var(--blue);
    text-decoration: none;
}

button, .button {
    display: inline-block;
    padding: 0.35rem 0.8rem;
    background: var(--panel);
    color: var(--fg);
    border: 1px solid var(--border);
    border-radius: 6px;
    cursor: pointer;
    font: inherit;
}

button:hover, .button:hover {
    border-color: var(--blue);
}

button.primary {
    background: var(--blue);
    color: var(--bg);
    border-color: var(--blue);
}

input, select, textarea {
    background: var(--bg-alt);
    color: var(--fg);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 0.35rem 0.5rem;
    font: inherit;
}

table {
    border-collapse: collapse;
    width: 100%;
}

td, th {
    text-align: left;
    padding: 0.3rem 0.5rem;
    border-bottom: 1px solid var(--border);
    vertical-align: top;
}

code {
    font-family: ui-monospace, "SF Mono", Menlo, monospace;
    font-size: 0.85em;
    word-break: break-all;
}

.dropzone {
    margin: 3rem auto;
    max-width: 640px;
    padding: 3rem 2rem;
    text-align: center;
    border: 2px dashed var(--border);
    border-radius: 12px;
}

.dropzone.over {
    border-color: var(--blue);
    background: var(--panel);
}

.subbar {
    padding: 0.4rem 1rem;
    border-bottom: 1px solid var(--border);
    background: var(--bg-alt);
}

/* Diagram viewer */
.viewer {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
}

.toolbar {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 1rem;
    border-bottom: 1px solid var(--border);
    background: var(--bg-alt);
}

.toolbar .spacer {
    flex: 1;
}

.toolbar .zoom {
    color: var(--muted);
    min-width: 3.5rem;
    text-align: right;
}

.crumbs .crumb {
    color: var(--fg);
}

.crumb-sep {
    color: var(--muted);
    margin: 0 0.35rem;
}

.viewer-body {
    flex: 1;
    display: flex;
    min-height: 0;
}

.tree {
    width: 240px;
    overflow: auto;
    padding: 0.75rem;
    border-right: 1px solid var(--border);
    background: var(--bg-alt);
}

.system-tree ul {
    list-style: none;
    padding-left: 0.9rem;
    margin: 0.2rem 0;
}

.system-tree a {
    color: var(--fg);
    display: inline-block;
    padding: 0.1rem 0.25rem;
    border-radius: 4px;
}

.system-tree a.active {
    background: var(--panel);
    color: var(--blue);
}

.diagram {
    flex: 1;
    position: relative;
    overflow: hidden;
    cursor: grab;
    background: var(--bg);
    user-select: none;
}

.diagram.light {
    background: #ffffff;
}

.diagram:active {
    cursor: grabbing;
}

.diagram .canvas {
    position: absolute;
    top: 0;
    left: 0;
}

.diagram .canvas svg {
    display: block;
}

.diagram g.block {
    cursor: pointer;
}

.diagram g.block[data-subsystem],
.diagram g.state[data-subchart] {
    cursor: zoom-in;
}

.inspector pre.script {
    margin: 0;
    padding: 0.5rem;
    max-height: 60vh;
    overflow: auto;
    font-family: ui-monospace, "SF Mono", Menlo, monospace;
    font-size: 12px;
    white-space: pre;
    background: var(--panel);
    border-radius: 4px;
}

.inspector {
    width: 320px;
    overflow: auto;
    padding: 0.75rem 1rem;
    border-left: 1px solid var(--border);
    background: var(--bg-alt);
}

.inspector h3 {
    margin: 0 0 0.25rem;
}

.inspector h4 {
    margin: 1rem 0 0.4rem;
    color: var(--purple);
}

.inspector td:first-child {
    color: var(--teal);
    white-space: nowrap;
}

.page.narrow {
    max-width: 480px;
}

.page.wide {
    max-width: 1200px;
}

.login-buttons {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    margin-top: 1.5rem;
}

.avatar {
    width: 24px;
    height: 24px;
    border-radius: 50%;
}

.inline-form {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
    margin: 1rem 0;
}

ul.plain {
    list-style: none;
    padding: 0;
    margin: 0.5rem 0 0;
}

h2 {
    margin-top: 2rem;
    color: var(--purple);
}

table.audit code {
    color: var(--muted);
}

.file-bar {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.file-bar .spacer {
    flex: 1;
}

.file-bar .error {
    margin: 0;
}

.file-body {
    flex: 1;
    display: flex;
    min-height: 0;
}

.file-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
    overflow: auto;
}

.history {
    width: 260px;
    overflow: auto;
    padding: 0.75rem 1rem;
    border-left: 1px solid var(--border);
    background: var(--bg-alt);
}

.history h4 {
    margin: 0 0 0.5rem;
    color: var(--purple);
}

ul.versions {
    list-style: none;
    padding: 0;
    margin: 0;
}

ul.versions li {
    padding: 0.35rem 0.4rem;
    border-radius: 4px;
}

ul.versions li.active {
    background: var(--panel);
}

pre.source {
    margin: 0;
    padding: 1rem;
    font-family: ui-monospace, "SF Mono", Menlo, monospace;
    font-size: 13px;
    white-space: pre;
}

/* Tabs and simulation */
.tabs {
    display: flex;
    gap: 0.25rem;
    padding: 0.4rem 1rem 0;
    border-bottom: 1px solid var(--border);
    background: var(--bg-alt);
}

.tab {
    border-bottom-left-radius: 0;
    border-bottom-right-radius: 0;
    border-bottom: none;
}

.tab.active {
    background: var(--bg);
    color: var(--blue);
}

.sim-panel {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 0;
}

.sim-form {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-end;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border);
}

.sim-form label {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
    color: var(--muted);
    font-size: 0.85rem;
}

.sim-form input[type=number] {
    width: 7rem;
}

.sim-form .grow {
    flex: 1;
    min-width: 16rem;
}

.sim-notice {
    margin: 0;
    padding: 0.75rem 1rem 0;
}

.sim-form .sim-inputs {
    flex-basis: 100%;
    min-width: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1rem;
    border: 1px solid var(--border);
    border-radius: 6px;
}

.sim-inputs p {
    flex-basis: 100%;
    margin: 0.25rem 0;
}

.sim-inputs label {
    flex: 1;
    min-width: 10rem;
}

.sim-form textarea {
    font-family: ui-monospace, "SF Mono", Menlo, monospace;
    resize: vertical;
}

.sim-actions {
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.running {
    color: var(--orange);
}

.ok {
    color: var(--green);
}

.sim-body {
    flex: 1;
    display: flex;
    min-height: 0;
}

.plot-host {
    flex: 1;
    min-width: 0;
    padding: 0.75rem;
    overflow: auto;
}

.signal-list {
    width: 260px;
    overflow: auto;
    padding: 0.75rem 1rem;
    border-left: 1px solid var(--border);
    background: var(--bg-alt);
}

.signal-list h4 {
    margin: 0.5rem 0;
    color: var(--purple);
}

.signal {
    display: flex;
    gap: 0.4rem;
    align-items: center;
    padding: 0.1rem 0;
    word-break: break-all;
}

ul.runs li {
    padding: 0.25rem 0;
}

/* Version comparison */
.legend {
    padding: 0.1rem 0.5rem;
    border-radius: 4px;
    border: 2px solid;
    font-size: 0.8rem;
}

.legend.added, .change.added { border-color: var(--green); }
.legend.modified, .change.modified { border-color: var(--orange); }
.legend.moved, .change.moved { border-color: var(--teal); }
.legend.nested { border-color: var(--purple); border-style: dashed; }
.change.removed { border-color: var(--red); }

.changes .change {
    border-left: 3px solid;
    padding: 0.3rem 0.5rem;
    margin-bottom: 0.4rem;
    word-break: break-word;
}

a.compare {
    font-size: 0.8rem;
}

/* Editing */
.edit-bar {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.4rem 1rem;
    border-bottom: 1px solid var(--border);
    background: var(--bg-alt);
}

.edit-bar.editing {
    border-bottom-color: var(--orange);
}

.edit-bar .spacer {
    flex: 1;
}

.edit-bar.error {
    color: var(--red);
}

.diagram.editing g.block {
    cursor: move;
}

.diagram:focus {
    outline: none;
}

.inspector input.param {
    width: 100%;
    font-family: ui-monospace, "SF Mono", Menlo, monospace;
    font-size: 0.85em;
}

.inspector input.block-name {
    width: 100%;
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

button.danger {
    border-color: var(--red);
    color: var(--red);
}

button:disabled {
    opacity: 0.5;
    cursor: default;
}

/* Lines are not interactive; let clicks reach the blocks beneath them. */
.diagram g.lines {
    pointer-events: none;
}

/* The plot figure is light; frame it on the dark page. */
.plot-host canvas {
    border-radius: 6px;
}

/* Scope settings in the inspector */
.inspector table.scope {
    margin-bottom: 0.5rem;
}

.inspector table.scope th {
    color: var(--muted);
    font-weight: normal;
}

.inspector details.raw {
    margin-top: 1rem;
}

.inspector details.raw summary {
    cursor: pointer;
    color: var(--muted);
}

.inspector details.raw pre {
    white-space: pre-wrap;
    word-break: break-all;
    font-size: 0.75rem;
}

.signal.generated {
    color: var(--muted);
}

.signal.toggle {
    margin-top: 0.4rem;
    color: var(--muted);
    font-size: 0.85rem;
}