:root {
  --bg: #0f1115;
  --panel: #151a21;
  --panel-2: #12161d;
  --border: #262d38;
  --text: #d7dde7;
  --text-dim: #8b95a5;
  --accent: #4da3ff;
  --green: #51cf66;
  --red: #ff6b6b;
  --amber: #ffc861;
  color-scheme: dark;
}

* {
  box-sizing: border-box;
}

html,
body,
#root {
  height: 100%;
  margin: 0;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family:
    system-ui,
    -apple-system,
    'Segoe UI',
    Roboto,
    sans-serif;
  font-size: 14px;
  overflow: hidden;
}

button {
  font: inherit;
  color: inherit;
  background: #1d242e;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 5px 12px;
  cursor: pointer;
  white-space: nowrap;
}
button:hover:not(:disabled) {
  background: #242d3a;
  border-color: #33405085;
}
button:disabled {
  opacity: 0.45;
  cursor: default;
}
button.primary {
  background: #1d4ed8;
  border-color: #2563eb;
}
button.primary:hover:not(:disabled) {
  background: #2158e8;
}
button.danger {
  background: #7f1d1d;
  border-color: #991b1b;
}
button.danger:hover:not(:disabled) {
  background: #931f1f;
}

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

/* ── header ─────────────────────────────────────────── */
.header {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 0 14px;
  height: 48px;
  background: var(--panel-2);
  border-bottom: 1px solid var(--border);
  flex: none;
}
.header .logo {
  display: flex;
  align-items: baseline;
  gap: 8px;
}
.header .logo b {
  font-size: 17px;
  letter-spacing: 0.02em;
}
.header .logo span {
  color: var(--text-dim);
  font-size: 12.5px;
}
.header .logo .tagline a {
  color: var(--accent);
  text-decoration: none;
}
.header .logo .tagline a:hover {
  text-decoration: underline;
}
.header .spacer {
  flex: 1;
}

/* ── main split ─────────────────────────────────────── */
.main {
  display: flex;
  flex: 1;
  min-height: 0;
}
.left {
  display: flex;
  flex-direction: column;
  min-width: 300px;
  border-right: 1px solid var(--border);
  background: var(--panel);
}
.divider {
  width: 5px;
  cursor: col-resize;
  background: transparent;
  flex: none;
}
.divider:hover {
  background: #2a3442;
}
.right {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  background: var(--bg);
}

/* ── editor pane ────────────────────────────────────── */
.editor-toolbar {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 10px;
  border-bottom: 1px solid var(--border);
  flex: none;
}
.editor-toolbar .name {
  color: var(--text-dim);
  font-size: 12.5px;
  overflow: hidden;
  text-overflow: ellipsis;
}
.editor-toolbar .examples-btn {
  color: var(--accent);
  border-color: #33547a;
  font-weight: 500;
}
.editor-toolbar .examples-btn:hover:not(:disabled) {
  background: #17263a;
  border-color: #4177b3;
}
.editor-host {
  flex: 1;
  min-height: 0;
  overflow: hidden;
}
.editor-host .cm-editor {
  height: 100%;
  font-size: 15px;
}
.editor-host .cm-scroller {
  font-family: 'SF Mono', Menlo, Consolas, 'Liberation Mono', monospace;
}

/* ── console ────────────────────────────────────────── */
.console {
  flex: none;
  height: 30%;
  min-height: 90px;
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--border);
  background: var(--panel-2);
}
.console-head {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 4px 10px;
  font-size: 11.5px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border-bottom: 1px solid var(--border);
}
.console-body {
  flex: 1;
  overflow-y: auto;
  padding: 6px 10px;
  font-family: 'SF Mono', Menlo, Consolas, monospace;
  font-size: 12px;
  line-height: 1.5;
  white-space: pre-wrap;
  word-break: break-word;
}
.console-body .err {
  color: var(--red);
}
.console-body .ok {
  color: var(--green);
}

/* ── viewer ─────────────────────────────────────────── */
.viewer-empty {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  color: var(--text-dim);
  text-align: center;
  padding: 30px;
}
.viewer-empty h2 {
  color: var(--text);
  font-weight: 600;
  margin: 0;
}
.viewer-empty .hint {
  max-width: 440px;
  line-height: 1.55;
}
.drop-active::after {
  content: 'Drop .seq file to view';
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  color: var(--accent);
  background: #0f1115d9;
  border: 2px dashed var(--accent);
  z-index: 50;
  pointer-events: none;
}

.seq-tabs {
  display: flex;
  gap: 4px;
  padding: 8px 12px 0;
  flex: none;
}
.seq-tabs button {
  border-radius: 6px 6px 0 0;
  border-bottom: none;
  background: transparent;
  color: var(--text-dim);
}
.seq-tabs button.active {
  background: var(--panel);
  color: var(--text);
}

.viewer-section {
  margin: 10px 12px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  flex: none;
}
.viewer-section > h3 {
  margin: 0;
  padding: 7px 12px;
  font-size: 11.5px;
  font-weight: 600;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 10px;
}
.viewer-section > h3 .free {
  flex: 1;
}
.viewer-section > h3 .fine {
  text-transform: none;
  letter-spacing: 0;
  font-weight: 400;
}

.timeline-host {
  position: relative;
}
.timeline-canvas {
  display: block;
  width: 100%;
  cursor: crosshair;
}
.timeline-canvas.panning {
  cursor: grabbing;
}

/* ── report ─────────────────────────────────────────── */
.report {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 26px;
  padding: 10px 14px;
  font-size: 13px;
}
.report .item b {
  display: block;
  font-size: 11px;
  font-weight: 600;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.report .item span {
  font-family: 'SF Mono', Menlo, Consolas, monospace;
  font-size: 12.5px;
}
.badge {
  display: inline-block;
  padding: 1px 8px;
  border-radius: 999px;
  font-size: 11.5px;
  border: 1px solid;
}
.badge.good {
  color: var(--green);
  border-color: #2f9e4466;
}
.badge.bad {
  color: var(--red);
  border-color: #e0313166;
}
.badge.neutral {
  color: var(--text-dim);
  border-color: var(--border);
}

/* ── inspector ──────────────────────────────────────── */
.inspector {
  padding: 8px 12px 12px;
  font-size: 13px;
}
.inspector .nav {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}
.inspector .nav .where {
  font-family: 'SF Mono', Menlo, Consolas, monospace;
  font-size: 12.5px;
  color: var(--text-dim);
}
.inspector table {
  border-collapse: collapse;
  width: 100%;
}
.inspector td,
.inspector th {
  text-align: left;
  padding: 4px 10px 4px 0;
  border-bottom: 1px solid #1d232d;
  vertical-align: top;
}
.inspector th {
  color: var(--text-dim);
  font-weight: 600;
  white-space: nowrap;
  width: 1%;
}
.inspector td {
  font-family: 'SF Mono', Menlo, Consolas, monospace;
  font-size: 12.5px;
}
.inspector .muted {
  color: var(--text-dim);
}
.inspector-hint {
  margin: 0;
  padding: 12px;
  color: var(--text-dim);
  font-size: 13px;
}

/* dropdown menu */
.menu-wrap {
  position: relative;
}
.menu {
  position: absolute;
  top: calc(100% + 4px);
  right: 0;
  min-width: 300px;
  background: #1a212b;
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: 0 8px 28px #0009;
  z-index: 40;
  padding: 4px;
}
.menu button {
  display: block;
  width: 100%;
  text-align: left;
  background: transparent;
  border: none;
  padding: 8px 10px;
  border-radius: 6px;
}
.menu button:hover {
  background: #232d3a;
}
.menu button b {
  display: block;
}
.menu button span {
  display: block;
  color: var(--text-dim);
  font-size: 12px;
  margin-top: 1px;
  white-space: normal;
}

/* ── examples modal ─────────────────────────────────── */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: #0a0c10cc;
  z-index: 60;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 30px;
}
.modal {
  width: min(1000px, 100%);
  max-height: 100%;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: 0 20px 60px #000a;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.modal-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
  flex: none;
}
.modal-head h2 {
  margin: 0;
  font-size: 17px;
}
.modal-head .count {
  color: var(--text-dim);
  font-size: 12.5px;
}
.modal-body {
  overflow-y: auto;
  padding: 6px 18px 18px;
}
.modal-body section {
  margin-top: 16px;
}
.modal-body section h3 {
  margin: 0 0 8px;
  font-size: 12px;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.07em;
}
.example-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 8px;
}
.example-card {
  text-align: left;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.example-card:hover {
  border-color: #3a4d66;
  background: #1a212b;
}
.example-card .ex-top {
  display: flex;
  align-items: baseline;
  gap: 8px;
}
.example-card .ex-top b {
  flex: 1;
  font-size: 13.5px;
}
.example-card .ex-time {
  color: var(--text-dim);
  font-size: 11px;
  font-family: 'SF Mono', Menlo, Consolas, monospace;
  white-space: nowrap;
}
.example-card .ex-desc {
  color: var(--text-dim);
  font-size: 12px;
  line-height: 1.45;
}