@import url('https://fonts.googleapis.com/css2?family=EB+Garamond:wght@400;600&display=swap');

:root {
  color-scheme: light;
  --bg: #f4efe6;
  --paper: #fffdf8;
  --ink: #201d18;
  --muted: #6b6258;
  --line: #d8ccbd;
  --line-strong: #b9a995;
  --accent: #45685f;
  --accent-dark: #2f4c44;
  --accent-soft: #e3eee8;
  --cream: #faf5eb;
  --wood: #8d6b4d;
  --wire: #6b5140;
  --ok: #38734e;
  --bad: #9a413a;
  --warning: #9c6a2e;
  --shadow: 0 16px 40px rgba(55, 43, 30, 0.10);
  --radius: 2px;
  --font-serif: "EB Garamond", Georgia, "Times New Roman", serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-family: var(--font-sans);
}

.back-nav {
  width: min(1220px, calc(100% - 32px));
  margin: 0 auto;
  padding: 0.75rem 0 0;
}
.back-nav a {
  font-size: 0.875rem;
  color: var(--muted);
  text-decoration: none;
}
.back-nav a:hover {
  color: var(--ink);
  text-decoration: underline;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: radial-gradient(circle at top left, #fbf6eb 0, var(--bg) 45%, #ebe2d4 100%);
  color: var(--ink);
  line-height: 1.45;
}

button,
input,
select,
textarea {
  font: inherit;
}

.topbar,
main {
  width: min(1220px, calc(100% - 32px));
  margin: 0 auto;
}

.topbar {
  padding: 18px 0 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(10px);
}

.brand {
  color: var(--ink);
  font-weight: 800;
  letter-spacing: -0.03em;
  text-decoration: none;
  font-size: 1.25rem;
}

.tabs {
  display: flex;
  gap: 4px;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 253, 248, 0.82);
}

button,
.tab-button {
  border: 0;
  border-radius: var(--radius);
  padding: 8px 14px;
  background: var(--accent);
  color: white;
  font-weight: 600;
  cursor: pointer;
}

button:hover {
  background: var(--accent-dark);
}

button:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
}

.tab-button {
  background: transparent;
  color: var(--muted);
}

.tab-button.active {
  background: var(--accent);
  color: white;
}

button.secondary {
  background: var(--accent-soft);
  color: var(--accent-dark);
}

button.danger-soft {
  background: #f1e1db;
  color: var(--bad);
}

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: block;
}

.plain-intro {
  background: rgba(255, 253, 248, 0.74);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 22px;
  margin: 6px 0 18px;
  box-shadow: 0 10px 28px rgba(55, 43, 30, 0.06);
}

.plain-intro h1 {
  margin: 0 0 8px;
  font-family: var(--font-serif);
  font-size: 2rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.2;
}

.plain-intro p,
.card p,
.subtle {
  color: var(--muted);
  margin: 0;
}

.grid {
  display: grid;
  gap: 18px;
}

.grid.two {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.card {
  background: rgba(255, 253, 248, 0.94);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 21px;
  margin-bottom: 18px;
}

.section-heading {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  margin-bottom: 16px;
}

.section-heading.inline {
  margin-bottom: 0;
}

.section-heading.split {
  justify-content: space-between;
  gap: 18px;
}

.step-number {
  flex: 0 0 auto;
  width: 31px;
  height: 31px;
  display: inline-grid;
  place-items: center;
  border-radius: 50%;
  background: var(--accent);
  color: white;
  font-weight: 850;
}

h2,
h3 {
  margin: 0 0 6px;
  font-family: var(--font-serif);
  line-height: 1.2;
  font-weight: 600;
}

h2 {
  font-size: 1.25rem;
}

h3 {
  font-size: 1rem;
}

.settings-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 13px;
}

.settings-grid.compact label,
.full-label {
  display: grid;
  gap: 6px;
  color: var(--ink);
  font-weight: 700;
}

.settings-grid label small,
.full-label small,
.hint,
.mini-panel {
  color: var(--muted);
  font-weight: 500;
  font-size: 0.88rem;
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  padding: 10px 12px;
  background: white;
  color: var(--ink);
  outline: none;
}

textarea {
  resize: vertical;
  min-height: 76px;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(69, 104, 95, 0.16);
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.message-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
  gap: 16px;
}

.small-input {
  max-width: 280px;
}

.mini-panel,
.status-box,
.trace-panel {
  background: var(--cream);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 12px 13px;
  margin-top: 14px;
}

.status-box.working {
  border-color: #d5b575;
  background: #fff5dc;
}

.status-box.error {
  border-color: #d7a29b;
  background: #f8e9e5;
  color: var(--bad);
}

.state-pill {
  align-self: flex-start;
  background: var(--accent-soft);
  color: var(--accent-dark);
  border: 1px solid #c5d8cf;
  padding: 9px 12px;
  border-radius: var(--radius);
  font-weight: 800;
  white-space: nowrap;
}

.plugboard-card {
  overflow: hidden;
}

.plugboard-physical {
  background: linear-gradient(180deg, #7e5f43 0, #5d4431 100%);
  border-radius: var(--radius);
  border: 1px solid #4e3928;
  padding: 10px;
  box-shadow: inset 0 2px 12px rgba(0, 0, 0, 0.18);
}

.plugboard-svg {
  width: 100%;
  display: block;
}

.socket circle {
  fill: #1f1b18;
  stroke: #d8c6ac;
  stroke-width: 2;
}

.socket text {
  fill: #fff3dc;
  font-size: 16px;
  font-weight: 850;
  pointer-events: none;
  dominant-baseline: middle;
  text-anchor: middle;
}

.socket.unused:hover circle,
.socket.selected circle {
  fill: var(--accent);
  stroke: #fff7e8;
}

.socket.used circle {
  fill: #2e2a26;
  stroke: #f4c56e;
}

.plug-wire {
  fill: none;
  stroke: #f1c36d;
  stroke-width: 5;
  stroke-linecap: round;
  opacity: 0.95;
}

.plug-wire-shadow {
  fill: none;
  stroke: rgba(0, 0, 0, 0.28);
  stroke-width: 8;
  stroke-linecap: round;
}

.plugboard-summary {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
  margin-top: 12px;
  color: var(--muted);
  font-size: 0.94rem;
}

.wire-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  justify-content: flex-end;
}

.wire-chip,
.path-stage {
  display: inline-block;
  background: var(--accent-soft);
  color: var(--accent-dark);
  border-radius: var(--radius);
  padding: 3px 8px;
  font-weight: 750;
  font-size: 0.84rem;
}

.visual-shell {
  overflow-x: auto;
  background: var(--cream);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 12px;
}

.visual-shell.small {
  min-height: 300px;
}

.stage-box {
  fill: #fffdf8;
  stroke: #cfc2b1;
  stroke-width: 2;
}

.stage-box.rotor {
  fill: #f5ead8;
}

.stage-box.reflector {
  fill: #e8efe9;
  stroke: #9db7aa;
}

.stage-box.plug {
  fill: #f2e5d8;
  stroke: #c1a78f;
}

.stage-label {
  fill: var(--muted);
  font-size: 12px;
  text-anchor: middle;
  font-weight: 700;
}

.stage-letter {
  fill: var(--ink);
  font-size: 26px;
  text-anchor: middle;
  font-weight: 900;
}

.path-line {
  fill: none;
  stroke: var(--accent);
  stroke-width: 3;
  marker-end: url(#arrow);
}

.path-line.return {
  stroke-dasharray: 7 6;
  stroke: #7a5a45;
}

.edge-label {
  fill: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.trace-grid {
  display: grid;
  grid-template-columns: minmax(130px, auto) minmax(0, 1fr);
  gap: 8px 12px;
  margin: 0;
}

.trace-grid dt {
  color: var(--muted);
  font-weight: 750;
}

.trace-grid dd {
  margin: 0;
}

.alignment {
  overflow-x: auto;
}

.alignment-table {
  border-collapse: separate;
  border-spacing: 4px;
  min-width: 100%;
}

.alignment-table th,
.alignment-table td {
  background: white;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 7px 9px;
  text-align: center;
  font-weight: 800;
}

.alignment-table th {
  color: var(--muted);
  font-size: 0.82rem;
}

.alignment-table .collision {
  background: #f8e4de;
  border-color: #d29188;
  color: var(--bad);
}

.menu-edge {
  stroke: #b59f87;
  stroke-width: 2;
}

.menu-edge.bad {
  stroke: var(--bad);
  stroke-width: 3;
}

.menu-node {
  fill: white;
  stroke: var(--accent);
  stroke-width: 2;
}

.menu-label {
  text-anchor: middle;
  dominant-baseline: middle;
  font-weight: 900;
  fill: var(--ink);
}

.assumption-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 6px;
  margin-bottom: 12px;
}

.assumption {
  border-radius: var(--radius);
  padding: 8px 6px;
  text-align: center;
  font-size: 0.86rem;
  font-weight: 800;
  border: 1px solid var(--line);
}

.assumption.survives {
  background: #e2f0e6;
  color: var(--ok);
  border-color: #a8cfb5;
}

.assumption.contradiction {
  background: #f7e8e4;
  color: var(--bad);
  border-color: #deb4ad;
}

.progress-wrap {
  margin-top: 15px;
  background: #eadfce;
  border-radius: var(--radius);
  height: 12px;
  overflow: hidden;
  border: 1px solid var(--line);
}

.progress-bar {
  width: 0%;
  height: 100%;
  background: var(--accent);
  transition: width 110ms linear;
}

select#bombe-stops {
  min-height: 220px;
}

code {
  background: #eee5d8;
  padding: 1px 5px;
  border-radius: 6px;
}

@media (max-width: 900px) {
  .grid.two,
  .message-grid,
  .settings-grid {
    grid-template-columns: 1fr;
  }

  .section-heading.split,
  .plugboard-summary {
    display: block;
  }

  .state-pill {
    margin-top: 12px;
    display: inline-block;
  }

  .topbar {
    align-items: flex-start;
    position: static;
  }

  .assumption-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.plain-intro.slim {
  padding: 18px 20px;
}

.plain-intro.slim h1 {
  font-size: clamp(1.9rem, 3vw, 3rem);
}

.button-help,
.inline-note,
.bombe-explain-grid {
  color: var(--muted);
  font-size: 0.9rem;
  margin-top: 12px;
}

.inline-note {
  background: #f7f0e5;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 9px 11px;
  margin-bottom: 12px;
}

.tip {
  position: relative;
  display: inline-grid;
  place-items: center;
  width: 18px;
  height: 18px;
  margin-left: 4px;
  border-radius: 50%;
  background: var(--accent-soft);
  border: 1px solid #b9d0c6;
  color: var(--accent-dark);
  font-size: 0.75rem;
  font-weight: 900;
  cursor: help;
  vertical-align: 1px;
}

.tip::after {
  content: attr(data-tip);
  position: absolute;
  left: 50%;
  bottom: calc(100% + 10px);
  transform: translateX(-50%) translateY(4px);
  width: min(280px, 70vw);
  background: #201d18;
  color: #fffdf8;
  border-radius: var(--radius);
  padding: 10px 11px;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.22);
  opacity: 0;
  pointer-events: none;
  transition: opacity 120ms ease, transform 120ms ease;
  z-index: 30;
  font-size: 0.84rem;
  line-height: 1.35;
  font-weight: 600;
  text-align: left;
}

.tip::before {
  content: "";
  position: absolute;
  left: 50%;
  bottom: calc(100% + 4px);
  transform: translateX(-50%);
  border: 6px solid transparent;
  border-top-color: #201d18;
  opacity: 0;
  transition: opacity 120ms ease;
  z-index: 31;
}

.tip:hover::after,
.tip:focus::after,
.tip:hover::before,
.tip:focus::before {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.legend-row {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  align-items: center;
  margin: 0 0 12px 43px;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 650;
}

.legend-line {
  display: inline-block;
  width: 34px;
  height: 0;
  border-top: 3px solid var(--accent);
  margin-right: 6px;
  vertical-align: middle;
}

.legend-line.backward {
  border-top-color: #7a5a45;
  border-top-style: dashed;
}

.enigma-svg .stage-box.active {
  stroke: var(--accent);
  stroke-width: 3;
}

.enigma-svg .forward-path {
  stroke: var(--accent);
  stroke-width: 4;
}

.enigma-svg .return-path {
  stroke: #7a5a45;
  stroke-width: 4;
  stroke-dasharray: 8 7;
}

.enigma-svg .stage-connector-label {
  fill: var(--muted);
  font-size: 11px;
  font-weight: 800;
  text-anchor: middle;
}

.trace-panel h3 {
  margin-top: 0;
}

.trace-steps {
  display: grid;
  gap: 8px;
  margin-top: 10px;
}

.trace-step {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr) 36px;
  align-items: center;
  gap: 10px;
  background: white;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 8px 10px;
}

.trace-step-index {
  width: 27px;
  height: 27px;
  display: inline-grid;
  place-items: center;
  border-radius: var(--radius);
  background: var(--accent-soft);
  color: var(--accent-dark);
  font-weight: 900;
}

.trace-step-letter {
  font-weight: 950;
  font-size: 1.15rem;
  text-align: right;
}

.offset-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 8px;
}

.offset-button {
  padding: 6px 9px;
  background: white;
  color: var(--accent-dark);
  border: 1px solid var(--line-strong);
}

.offset-button.selected {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}

.bombe-explain-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.bombe-explain-grid > div {
  background: #f7f0e5;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 10px 12px;
}

.menu-edge-label {
  fill: var(--muted);
  font-size: 11px;
  font-weight: 800;
  text-anchor: middle;
}

@media (max-width: 900px) {
  .legend-row {
    margin-left: 0;
  }

  .bombe-explain-grid {
    grid-template-columns: 1fr;
  }
}

.forward-path {
  marker-end: url(#arrow-forward);
}

.return-path {
  marker-end: url(#arrow-return);
}

.server-warning {
  margin: 6px 0 18px;
  background: #fff5dc;
  border: 1px solid #d5b575;
  border-radius: var(--radius);
  padding: 12px 14px;
  color: #61461e;
  font-weight: 650;
}

.no-help-lines small {
  display: none;
}

.settings-grid.one-line {
  grid-template-columns: minmax(160px, 260px);
}

.advanced-box {
  margin-top: 14px;
  background: var(--cream);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 11px 13px;
}

.advanced-box summary {
  cursor: pointer;
  font-weight: 800;
  color: var(--accent-dark);
}

.advanced-box .settings-grid {
  margin-top: 13px;
}

.compact-trace {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.trace-chip {
  display: inline-flex;
  gap: 6px;
  align-items: center;
  background: white;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 7px 10px;
  font-weight: 750;
}

.trace-chip strong {
  color: var(--accent-dark);
}

.trace-arrow {
  color: var(--muted);
  font-weight: 900;
}

.bombe-explain-grid.compact {
  margin-top: 12px;
}

.microcopy {
  color: var(--muted);
  font-size: 0.94rem;
  line-height: 1.45;
  margin: 4px 0 0;
}

.hidden-controls {
  display: none;
}

.checkbox-line {
  display: flex !important;
  align-items: center;
  gap: 10px;
  min-height: 48px;
}

.checkbox-line input {
  width: 18px;
  height: 18px;
  accent-color: var(--accent);
}

.checkbox-line span {
  font-weight: 750;
}

.stage-letter {
  font-size: 1.25rem;
}

.stage-box.plug + .stage-label,
.stage-box.lamp + .stage-label {
  font-weight: 800;
}

.stage-detail {
  fill: var(--muted);
  font-size: 10.5px;
  text-anchor: middle;
  font-weight: 700;
}

.window-header {
  fill: var(--muted);
  font-size: 11px;
  text-anchor: middle;
  font-weight: 800;
}

.window-label-box {
  fill: #fffdf8;
  stroke: #cfc2b1;
  stroke-width: 1.5;
}

.window-label-text {
  fill: var(--accent-dark);
  font-size: 15px;
  font-weight: 900;
  text-anchor: middle;
  dominant-baseline: middle;
}

.search-summary {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 10px 0 4px;
}

.search-summary span {
  background: white;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 7px 10px;
  font-size: 0.88rem;
  font-weight: 750;
  color: var(--accent-dark);
}

.menu-node {
  fill: #1f1b18;
  stroke: #d8c6ac;
  stroke-width: 2;
}

.menu-label {
  fill: #fff3dc;
}

.edge-label {
  paint-order: stroke;
  stroke: var(--cream);
  stroke-width: 4px;
  stroke-linejoin: round;
}


.menu-edge {
  fill: none;
  stroke: #b59f87;
  stroke-width: 2.2;
  stroke-dasharray: 6 5;
}

.menu-edge.bad {
  stroke: var(--bad);
  stroke-width: 3;
  stroke-dasharray: none;
}

.menu-node.inactive {
  opacity: 0.33;
}

.menu-note {
  fill: var(--muted);
  font-size: 12px;
  font-weight: 800;
  text-anchor: middle;
}

.window-summary-box {
  fill: #fffdf8;
  stroke: #d7ccbe;
  stroke-width: 1.5;
}

.window-summary-title {
  fill: var(--accent-dark);
  font-size: 14px;
  font-weight: 850;
  text-anchor: middle;
}

.window-summary-text {
  fill: var(--muted);
  font-size: 12px;
  font-weight: 700;
  text-anchor: middle;
}

.window-pointer {
  fill: none;
  stroke: #cbbca8;
  stroke-width: 2;
  stroke-linecap: round;
}

.menu-svg {
  overflow: visible;
}

.menu-link {
  stroke: #d6b27c;
}

.menu-link-shadow {
  stroke: rgba(0, 0, 0, 0.24);
}

.menu-edge-badge {
  fill: #fffaf0;
  stroke: #c5b290;
  stroke-width: 1.5;
}

.menu-edge-badge-text {
  fill: var(--accent-dark);
  font-size: 11px;
  font-weight: 850;
  text-anchor: middle;
  dominant-baseline: middle;
}

.menu-board {
  margin-top: 6px;
}

.menu-stats {
  margin-top: 10px;
  color: var(--muted);
  font-size: 0.92rem;
  font-weight: 750;
}

.rotor-window-tab {
  fill: #fff7e8;
  stroke: #c7b395;
  stroke-width: 1.4;
}

.rotor-window-tab-text {
  fill: var(--accent-dark);
  font-size: 11px;
  font-weight: 900;
  text-anchor: middle;
  dominant-baseline: middle;
}

.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}