:root {
  /* A Dark Room-ish: monochrome, narrow column, no decoration */
  --paper: #f3f3f3;
  --paper-2: #f3f3f3;
  --paper-3: #f3f3f3;
  --ink: #111;
  --ink-2: #111;
  --ink-3: #3b3b3b;
  --line: rgba(17, 17, 17, 0.25);
  --line-2: rgba(17, 17, 17, 0.38);
  --wash: rgba(17, 17, 17, 0.06);

  --radius: 0px;
  --radius-sm: 0px;
  --pad: clamp(14px, 3.8vw, 26px);
  --gap: clamp(10px, 2.4vw, 16px);

  --serif: "Noto Serif SC", "Noto Serif", Times, "Times New Roman", serif;
  --sans: var(--serif);
  --mono: "Source Code Pro", ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;

  --focus: 2px solid var(--ink);
  --focus-shadow: 0 0 0 3px rgba(17, 17, 17, 0.18);

  --rail-w: 360px;
  --rail-bottom-h: 220px;
}

/* Ensure the HTML 'hidden' attribute always wins.
   Without this, fixed-position overlays can block interaction. */
[hidden] {
  display: none !important;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: var(--serif);
  line-height: 1.7;
  background: var(--paper);
  overflow-x: hidden;
}

body::before {
  display: none;
}

a {
  color: inherit;
}

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

:focus-visible {
  outline: var(--focus);
  outline-offset: 3px;
  box-shadow: var(--focus-shadow);
}

.skip-link {
  position: absolute;
  left: 12px;
  top: 10px;
  padding: 10px 12px;
  background: var(--paper);
  border: 1px solid var(--line-2);
  border-radius: 0;
  color: var(--ink);
  text-decoration: none;
  transform: translateY(-140%);
  transition: transform 180ms ease;
  z-index: 50;
}

.skip-link:focus-visible {
  transform: translateY(0);
}

.app {
  position: relative;
  z-index: 1;
  min-height: 100%;
  padding: var(--pad);
  max-width: 44rem;
  margin: 0 auto;
}

.topbar {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: var(--gap);
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.kicker {
  margin: 0;
  font-family: var(--mono);
  letter-spacing: 0.04em;
  font-size: 12px;
  color: var(--ink-3);
}

.title {
  margin: 0;
  font-family: var(--serif);
  font-weight: 700;
  letter-spacing: 0;
  font-size: clamp(22px, 3.8vw, 34px);
  line-height: 1.15;
}

.topbar__right {
  display: flex;
  gap: 10px;
  align-items: center;
}

.iconbtn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  border-radius: 0;
  border: 1px solid var(--line-2);
  background: transparent;
  cursor: pointer;
  transition: background-color 140ms ease, color 140ms ease, border-color 140ms ease;
  box-shadow: none;
  -webkit-tap-highlight-color: transparent;
}

.iconbtn:hover {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}

.iconbtn:active {
  background: rgba(17, 17, 17, 0.86);
}

.iconbtn--ghost {
  background: transparent;
}

.iconbtn__label {
  font-family: var(--serif);
  font-weight: 600;
  letter-spacing: 0;
}

.iconbtn__meta {
  font-family: var(--mono);
  font-size: 12px;
  padding: 2px 8px;
  border-radius: 0;
  border: 1px solid currentColor;
  background: transparent;
}

.frame {
  display: block;
}

.main {
  min-width: 0;
}

.scene {
  border: 0;
  border-radius: 0;
  background: transparent;
  box-shadow: none;
  overflow: visible;
}

.scene__head {
  display: flex;
  gap: 14px;
  align-items: flex-end;
  justify-content: space-between;
  padding: 0 0 10px;
  margin-bottom: 10px;
  border-bottom: 1px solid var(--line);
  background: transparent;
}

.scene__title {
  margin: 0;
  font-family: var(--serif);
  font-weight: 600;
  font-size: 18px;
  letter-spacing: 0;
}

.scene__status {
  display: block;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-3);
}

.rail__status {
  margin-top: 10px;
}

.chip {
  display: inline;
  border: 0;
  padding: 0;
  background: transparent;
}

.chip + .chip::before {
  content: " / ";
  color: var(--ink-3);
}

.chip__k {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.02em;
  text-transform: none;
  color: var(--ink-3);
}

.chip__k::after {
  content: "：";
}

.chip__v {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
}

.logwrap {
  position: relative;
  padding: 12px 0 14px;
  min-height: min(64vh, 720px);
  max-height: min(72vh, 820px);
  overflow: auto;
  scroll-behavior: smooth;
  border-bottom: 1px solid var(--line);
}

.log {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.log__item {
  position: relative;
  padding: 0;
  border: 0;
  background: transparent;
  border-radius: 0;
  animation: ink-in 240ms ease both;
}

.log__item::before {
  content: none;
}

.log__text {
  margin: 0;
  font-size: 16px;
  color: var(--ink);
  font-family: var(--serif);
  line-height: 1.75;
}

.logfade {
  display: none;
}

.rail {
  position: relative;
}

.rail__inner {
  position: static;
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  border-radius: 0;
  background: transparent;
  box-shadow: none;
  overflow: visible;
}

.rail__head {
  padding: 0;
  border-bottom: 0;
  background: transparent;
}

.rail__title {
  margin: 0;
  font-family: var(--serif);
  font-weight: 600;
  font-size: 16px;
}

.rail__hint {
  margin: 6px 0 0;
  color: var(--ink-3);
  font-size: 13px;
}

.choices {
  display: grid;
  gap: 8px;
  padding: 12px 0 0;
}

.choice {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: baseline;
  gap: 10px;
  width: 100%;
  text-align: left;
  padding: 12px 10px;
  border-radius: 0;
  border: 1px solid var(--line);
  background: transparent;
  cursor: pointer;
  transition: background-color 140ms ease, color 140ms ease, border-color 140ms ease;
  box-shadow: none;
  -webkit-tap-highlight-color: transparent;
  animation: ink-in 240ms ease both;
}

.choice:hover {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}

.choice:active {
  background: rgba(17, 17, 17, 0.86);
}

.choice[disabled] {
  opacity: 0.55;
  cursor: not-allowed;
  box-shadow: none;
}

.choice--secondary {
  background: transparent;
}

.choice__label {
  font-weight: 600;
  letter-spacing: 0;
}

.choice__tag {
  font-family: var(--mono);
  font-size: 12px;
  color: currentColor;
  padding: 0;
  border-radius: 0;
  border: 0;
  background: transparent;
  white-space: nowrap;
}

.choice__sub {
  grid-column: 1 / -1;
  font-size: 12px;
  color: var(--ink-3);
  margin-top: 2px;
}

.rail__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 10px 0 0;
  border-top: 0;
  background: transparent;
}

.rail__kbd {
  margin: 0;
  display: inline-flex;
  gap: 6px;
  align-items: center;
  color: var(--ink-3);
  font-size: 12px;
}

.rail__kbdkey {
  font-family: var(--mono);
  font-size: 11px;
  padding: 2px 7px;
  border: 1px solid var(--line);
  border-radius: 0;
  background: transparent;
}

.rail__kbdsep {
  margin-left: 4px;
  font-family: var(--mono);
  font-size: 11px;
}

.textbtn {
  border: 1px solid transparent;
  background: transparent;
  padding: 6px 8px;
  border-radius: 0;
  cursor: pointer;
  font-weight: 600;
  color: var(--ink);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: background-color 140ms ease, border-color 140ms ease;
}

.textbtn:hover {
  border-color: var(--line);
  background: rgba(17, 17, 17, 0.06);
}

.textbtn:active {
  background: rgba(17, 17, 17, 0.1);
}

.backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 20;
}

.drawer {
  position: fixed;
  right: 0;
  top: 0;
  height: 100%;
  width: min(420px, 92vw);
  background: var(--paper);
  border-left: 1px solid var(--line-2);
  box-shadow: none;
  z-index: 30;
  padding: 16px;
  display: grid;
  grid-template-rows: auto auto 1fr auto;
  gap: 10px;
}

.drawer__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.drawer__title {
  margin: 0;
  font-family: var(--serif);
  font-weight: 700;
  font-size: 20px;
}

.drawer__desc {
  margin: 0;
  color: var(--ink-3);
  font-size: 13px;
}

.drawer__body {
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 0;
  background: transparent;
  padding: 10px;
}

.inv {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.inv__empty {
  padding: 12px;
  border: 1px dashed var(--line);
  border-radius: 0;
  color: var(--ink-3);
  background: transparent;
}

.inv__btn {
  width: 100%;
  text-align: left;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
  padding: 12px 12px;
  border-radius: 0;
  border: 1px solid var(--line);
  background: transparent;
  cursor: pointer;
  transition: background-color 140ms ease, color 140ms ease, border-color 140ms ease;
}

.inv__btn:hover {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}

.inv__name {
  font-weight: 600;
}

.inv__meta {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-3);
}

.drawer__foot {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.btn {
  border: 1px solid var(--line-2);
  background: transparent;
  border-radius: 0;
  padding: 10px 12px;
  cursor: pointer;
  font-weight: 700;
  letter-spacing: 0;
  transition: background-color 140ms ease, color 140ms ease, border-color 140ms ease;
}

.btn:hover {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}

.btn:active {
  background: rgba(17, 17, 17, 0.86);
}

.btn[disabled] {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
}

.btn--quiet {
  background: transparent;
  font-weight: 600;
}

.btn--danger {
  border-color: var(--line-2);
  background: transparent;
  color: var(--ink);
}

.modal {
  border: 0;
  padding: 0;
  width: min(720px, calc(100vw - 24px));
  background: transparent;
}

.modal::backdrop {
  background: rgba(0, 0, 0, 0.5);
}

.modal__panel {
  border: 1px solid var(--line);
  border-radius: 0;
  background: var(--paper);
  box-shadow: none;
  overflow: hidden;
}

.modal__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 16px 12px;
  border-bottom: 1px solid var(--line);
  background: transparent;
}

.modal__title {
  margin: 0;
  font-family: var(--serif);
  font-weight: 700;
  font-size: 20px;
}

.modal__body {
  padding: 14px 16px 6px;
  display: grid;
  gap: 14px;
}

.modal__foot {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  padding: 12px 16px 16px;
  border-top: 1px solid var(--line);
  background: transparent;
}

.field {
  border: 1px solid var(--line);
  border-radius: 0;
  padding: 12px;
  margin: 0;
  background: transparent;
}

.field__legend {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.02em;
  text-transform: none;
  color: var(--ink-3);
  padding: 0 6px;
}

.field__hint {
  margin: 8px 0 0;
  font-size: 13px;
  color: var(--ink-3);
}

.row {
  display: grid;
  grid-template-columns: 1fr minmax(160px, 240px);
  gap: 10px;
  align-items: center;
  padding: 10px 0;
  border-top: 1px solid var(--line);
}

.row:first-of-type {
  border-top: 0;
}

.row__label {
  font-weight: 600;
}

.row__control input[type="range"] {
  width: 100%;
}

.row--toggle .row__control {
  display: flex;
  justify-content: flex-end;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 10px;
}

@keyframes ink-in {
  from {
    opacity: 0;
    transform: translateY(6px);
    filter: blur(0.4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
    filter: blur(0);
  }
}

@media (prefers-reduced-motion: reduce) {
  .log__item,
  .choice {
    animation: none;
  }

  .logwrap {
    scroll-behavior: auto;
  }

  .iconbtn,
  .choice,
  .btn,
  .textbtn {
    transition: none;
  }
}

.app[data-contrast="high"] {
  --line: rgba(17, 17, 17, 0.42);
  --line-2: rgba(17, 17, 17, 0.6);
  --wash: rgba(17, 17, 17, 0.1);
}

@media (max-width: 880px) {
  .logwrap {
    max-height: none;
    min-height: auto;
  }
}

@media (max-width: 480px) {
  .topbar {
    align-items: flex-start;
  }

  .topbar__right {
    align-items: flex-start;
  }

  .iconbtn {
    padding: 9px 10px;
    gap: 8px;
  }

  .iconbtn__meta {
    padding: 2px 7px;
  }

  .scene__head {
    flex-direction: column;
    align-items: flex-start;
  }

  .scene__status {
    margin-top: 6px;
  }

  .row {
    grid-template-columns: 1fr;
    align-items: start;
  }

  .row__control {
    width: 100%;
  }
}

.inv__btn--selected {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}