@font-face {
  font-family: "Gen Interface JP";
  src: url("fonts/GenInterfaceJP-Regular.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

:root {
  --bg: #ffffff;
  --ink: #070707;
  --muted: #676767;
  --line: #d8d8d8;
  --soft: #f5f5f5;
  --panel: rgba(255, 255, 255, 0.985);
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.14);
  --control-size: 40px;
  --page-gutter: 18px;
  --ui-font: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  /* Latin/numerals render from Charter (clean lining figures); Japanese from Mincho. */
  --word-font-mincho: Charter, "Bitstream Charter", "Iowan Old Style", Cambria, Georgia,
    "Hiragino Mincho ProN", "YuMincho", "Yu Mincho", "BIZ UDMincho", "Noto Serif JP", serif;
  --word-font-gen: "Gen Interface JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", "YuGothic",
    "Noto Sans JP", sans-serif;
  --word-font: var(--word-font-mincho);
}

:root[data-word-font="gen"] {
  --word-font: var(--word-font-gen);
}

* {
  box-sizing: border-box;
}

html,
body {
  width: 100%;
  min-height: 100%;
  margin: 0;
  overflow: hidden;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--ui-font);
  letter-spacing: 0;
}

button,
input {
  font: inherit;
}

select {
  font: inherit;
}

button {
  color: inherit;
}

.app-shell {
  position: fixed;
  inset: 0;
  overflow: hidden;
  background:
    linear-gradient(90deg, rgba(0, 0, 0, 0.025) 1px, transparent 1px),
    linear-gradient(180deg, rgba(0, 0, 0, 0.018) 1px, transparent 1px),
    var(--bg);
  background-size: 64px 64px, 64px 64px, auto;
}

.word-cascade {
  position: absolute;
  inset: 0;
  overflow: hidden;
  /* Scope layout/paint invalidation to the cascade; it already clips, so no visual change. */
  contain: layout paint;
  user-select: none;
}

.top-controls {
  position: fixed;
  z-index: 30;
  top: calc(env(safe-area-inset-top, 0px) + var(--page-gutter));
  left: calc(env(safe-area-inset-left, 0px) + var(--page-gutter));
  display: flex;
  gap: 8px;
}

.status-message {
  position: fixed;
  z-index: 20;
  left: 50%;
  top: calc(env(safe-area-inset-top, 0px) + var(--page-gutter) + var(--control-size) + 12px);
  transform: translateX(-50%);
  max-width: min(520px, calc(100vw - 40px));
  padding: 7px 12px;
  border: 1px solid transparent;
  background: rgba(255, 255, 255, 0.78);
  color: var(--muted);
  font-size: 12px;
  text-align: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 220ms ease, border-color 220ms ease;
}

.status-message.is-visible {
  border-color: var(--line);
  opacity: 1;
}

.icon-button {
  display: inline-flex;
  width: var(--control-size);
  height: var(--control-size);
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.94);
  color: var(--ink);
  cursor: pointer;
  touch-action: manipulation;
  transition: background 160ms ease, border-color 160ms ease, transform 160ms ease;
}

.icon-button:focus-visible,
.text-button:focus-visible {
  border-color: var(--ink);
  background: #fff;
  outline: none;
}

.icon-button:active,
.text-button:active {
  transform: translateY(1px);
}

.icon-button svg,
.text-button svg {
  width: 18px;
  height: 18px;
  stroke-width: 1.6;
}

.icon-button.compact {
  width: 34px;
  height: 34px;
  background: transparent;
}

.text-button {
  display: inline-flex;
  min-height: 38px;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  padding: 8px 12px;
  color: var(--ink);
  font-size: 13px;
  text-decoration: none;
  cursor: pointer;
  touch-action: manipulation;
  transition: background 160ms ease, border-color 160ms ease, transform 160ms ease;
}

.text-button.primary {
  background: var(--ink);
  border-color: var(--ink);
  color: #fff;
}

.text-button.primary:focus-visible {
  background: #222;
}

.floating-word {
  --word-color-rgb: 0, 0, 0;
  appearance: none;
  position: absolute;
  top: 0;
  left: 0;
  border: 0;
  background: transparent;
  padding: 0;
  font-family: var(--word-font);
  line-height: 1;
  color: rgba(var(--word-color-rgb), var(--word-alpha, 0.5));
  white-space: nowrap;
  contain: layout style;
  transform-origin: 0 0;
  text-rendering: optimizeLegibility;
  cursor: pointer;
  touch-action: manipulation;
  transition: color 180ms ease, filter 180ms ease, letter-spacing 180ms ease;
}

.floating-word.is-description-missing {
  --word-color-rgb: 154, 114, 0;
}

.floating-word-label {
  display: inline-block;
}

.floating-word-orientation {
  display: inline-block;
  transform-origin: center;
}

.floating-word[data-writing-direction="down"] .floating-word-orientation,
.floating-word[data-writing-direction="up"] .floating-word-orientation {
  writing-mode: vertical-rl;
  text-orientation: mixed;
}

.floating-word[data-writing-direction="up"] .floating-word-orientation {
  transform: rotate(180deg);
}

.floating-word[data-writing-direction="left"] .floating-word-orientation {
  transform: scaleX(-1);
}

.floating-word:focus-visible {
  color: rgba(var(--word-color-rgb), var(--word-hover-alpha, 0.92));
  filter: drop-shadow(0 0 8px rgba(0, 0, 0, 0.24));
  letter-spacing: 0.02em;
  outline: none;
}

.popover {
  position: fixed;
  z-index: 50;
  top: calc(env(safe-area-inset-top, 0px) + var(--page-gutter) + var(--control-size) + 8px);
  left: calc(env(safe-area-inset-left, 0px) + var(--page-gutter));
  width: min(300px, calc(100vw - 36px));
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--panel);
  box-shadow: var(--shadow);
  padding: 16px;
  max-height: min(560px, calc(100dvh - env(safe-area-inset-top, 0px) - 92px));
  overflow-y: auto;
  overscroll-behavior: contain;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-6px);
  transition: opacity 160ms ease, transform 160ms ease, visibility 0s linear 160ms;
}

.popover.is-open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
  transition-delay: 0s;
}

.popover-wide {
  width: min(360px, calc(100vw - 36px));
}

/* Settings remains a compact, scrollable control tray rather than taking over the page. */
#settingsPanel {
  max-height: min(50dvh, 560px);
}

.popover-title {
  margin: 0 0 14px;
  color: var(--muted);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
}

.popover-text {
  margin: 0 0 18px;
  color: #202020;
  font-family: var(--word-font);
  font-size: 17px;
  line-height: 1.5;
}

.field-label {
  display: flex;
  justify-content: space-between;
  margin: 0 0 8px;
  color: var(--muted);
  font-size: 12px;
}

.range-input {
  width: 100%;
  margin: 0 0 18px;
  accent-color: var(--ink);
}

.developer-toggle {
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  border: 0;
  border-top: 1px solid var(--line);
  background: transparent;
  padding: 14px 0 4px;
  color: var(--muted);
  font-size: 12px;
  text-align: left;
  cursor: pointer;
}

.developer-toggle:hover,
.developer-toggle.is-open {
  color: var(--ink);
}

.developer-toggle svg {
  width: 16px;
  height: 16px;
  transition: transform 160ms ease;
}

.developer-toggle.is-open svg {
  transform: rotate(180deg);
}

#devSettings {
  margin-top: 14px;
  border-top: 1px solid var(--line);
  padding-top: 14px;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 18px;
  color: var(--muted);
  font-size: 12px;
  cursor: pointer;
}

.checkbox-label input {
  margin: 0;
  accent-color: var(--ink);
}

.select-input {
  width: 100%;
  min-height: 38px;
  margin: 0 0 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  padding: 8px 10px;
  color: var(--ink);
}

.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 80;
  display: grid;
  place-items: center;
  padding: 20px;
  background: rgba(255, 255, 255, 0.68);
  visibility: hidden;
  opacity: 0;
  pointer-events: none;
  transition: opacity 200ms ease, visibility 0s linear 200ms;
}

.modal-backdrop.is-open {
  visibility: visible;
  opacity: 1;
  pointer-events: auto;
  transition-delay: 0s;
}

.detail-modal {
  position: relative;
  display: flex;
  flex-direction: column;
  width: min(620px, 100%);
  min-width: 0;
  max-height: calc(100vh - 40px - env(safe-area-inset-top, 0px) - env(safe-area-inset-bottom, 0px));
  max-height: calc(100dvh - 40px - env(safe-area-inset-top, 0px) - env(safe-area-inset-bottom, 0px));
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.96);
  box-shadow: var(--shadow);
  padding: 34px;
  transform: scale(0.965) translateY(8px);
  transition: transform 200ms ease;
}

.modal-backdrop.is-open .detail-modal {
  transform: scale(1) translateY(0);
}

.modal-close {
  position: absolute;
  top: 14px;
  right: 14px;
}

.modal-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-bottom: 20px;
  padding-inline-end: 44px;
}

.modal-meta span {
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 4px 8px;
  color: var(--muted);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.detail-modal h2 {
  margin: 0;
  font-family: var(--word-font);
  font-weight: 400;
  font-size: clamp(46px, 10vw, 86px);
  line-height: 1.1;
  white-space: nowrap;
  overflow-x: clip;
}

.modal-reading {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.modal-reading[hidden] {
  display: none;
}

.modal-desc[hidden] {
  display: none;
}

.modal-desc {
  flex: 1 1 auto;
  min-height: 0;
  overflow-y: auto;
  margin: 22px 0 28px;
  color: #202020;
  font-family: var(--word-font);
  line-height: 1.42;
  font-size: 24px;
  white-space: pre-line;
}

.modal-desc.is-missing-desc {
  color: #9a7200;
}

.modal-usage {
  flex: none;
  margin: 0 0 26px;
  border-top: 1px solid var(--line);
  padding-top: 18px;
}

.modal-usage[hidden] {
  display: none;
}

.modal-usage h3 {
  margin: 0 0 12px;
  color: var(--muted);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.modal-usage-list {
  display: grid;
  gap: 13px;
  margin: 0;
  padding: 0 0 0 25px;
  color: #202020;
  font-family: var(--word-font);
  font-size: 18px;
  line-height: 1.45;
}

.modal-usage-example {
  white-space: pre-line;
}

.modal-usage-meaning {
  margin-top: 3px;
  color: var(--muted);
  font-family: var(--ui-font);
  font-size: 13px;
  line-height: 1.5;
}

.modal-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
}

.modal-site-links {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
}

.modal-actions .text-button.is-disabled {
  border-color: var(--line);
  background: var(--soft);
  color: #a4a4a4;
  cursor: not-allowed;
  opacity: 0.72;
  pointer-events: none;
}

@media (min-width: 641px) and (max-width: 1024px) {
  :root {
    --control-size: 44px;
    --page-gutter: 16px;
  }

  .popover {
    width: min(320px, calc(100vw - 32px));
  }

  .popover-wide {
    width: min(400px, calc(100vw - 32px));
  }

  .detail-modal {
    width: min(680px, calc(100vw - 48px));
    padding: 32px;
  }

  .modal-desc {
    font-size: 22px;
    line-height: 1.5;
  }
}

@media (max-width: 640px) {
  :root {
    --control-size: 44px;
    --page-gutter: 12px;
  }

  .top-controls {
    gap: 6px;
  }

  .icon-button {
    border-radius: 10px;
  }

  .popover {
    top: auto;
    right: calc(env(safe-area-inset-right, 0px) + 8px);
    bottom: calc(env(safe-area-inset-bottom, 0px) + 8px);
    left: calc(env(safe-area-inset-left, 0px) + 8px);
    width: auto;
    max-height: min(68dvh, 560px);
    border-radius: 16px;
    padding: 18px;
    transform: translateY(12px);
  }

  .popover.is-open {
    transform: translateY(0);
  }

  .select-input {
    min-height: 44px;
  }

  .range-input {
    min-height: 44px;
  }

  .field-label,
  .checkbox-label {
    font-size: 13px;
  }

  .modal-backdrop {
    place-items: end center;
    padding: max(8px, env(safe-area-inset-top, 0px))
      max(8px, env(safe-area-inset-right, 0px))
      max(8px, env(safe-area-inset-bottom, 0px))
      max(8px, env(safe-area-inset-left, 0px));
  }

  .detail-modal {
    width: 100%;
    max-height: calc(100dvh - max(16px, env(safe-area-inset-top, 0px)) - max(8px, env(safe-area-inset-bottom, 0px)));
    border-radius: 18px 18px 10px 10px;
    padding: 30px 18px 18px;
    transform: translateY(18px);
  }

  .detail-modal h2 {
    font-size: clamp(34px, 13vw, 62px);
  }

  .modal-meta {
    margin-bottom: 16px;
  }

  .modal-desc {
    margin: 18px 0 22px;
    font-size: 18px;
    line-height: 1.55;
  }

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

  .modal-site-links {
    display: contents;
  }

  .modal-actions .text-button {
    min-height: 44px;
  }

  .modal-close {
    min-width: 44px;
    min-height: 44px;
  }
}

@media (hover: none), (pointer: coarse) {
  .icon-button,
  .text-button {
    min-width: 44px;
    min-height: 44px;
  }

  .floating-word {
    display: inline-flex;
    min-width: var(--word-hit-size, 44px);
    min-height: var(--word-hit-size, 44px);
    align-items: center;
    justify-content: center;
  }

  .range-input {
    min-height: 44px;
  }
}

@media (hover: hover) and (pointer: fine) {
  .icon-button:hover,
  .text-button:hover {
    border-color: var(--ink);
    background: #fff;
    outline: none;
  }

  .floating-word:hover {
    color: rgba(var(--word-color-rgb), var(--word-hover-alpha, 0.92));
    filter: drop-shadow(0 0 8px rgba(0, 0, 0, 0.24));
    letter-spacing: 0.02em;
    outline: none;
  }

  .text-button.primary:hover {
    background: #222;
  }
}

@media (max-height: 500px) and (pointer: coarse) {
  .popover {
    max-height: calc(100dvh - env(safe-area-inset-top, 0px) - env(safe-area-inset-bottom, 0px) - 16px);
  }

  .detail-modal {
    max-height: calc(100dvh - env(safe-area-inset-top, 0px) - env(safe-area-inset-bottom, 0px) - 12px);
    padding-block: 22px 12px;
  }

  .modal-meta {
    margin-bottom: 10px;
  }

  .modal-reading {
    margin-top: 6px;
  }

  .modal-desc {
    margin: 10px 0 12px;
    font-size: 17px;
    line-height: 1.45;
  }
}

@media (prefers-reduced-motion: reduce) {
  .icon-button,
  .text-button,
  .popover,
  .modal-backdrop,
  .detail-modal,
  .status-message,
  .floating-word {
    transition-duration: 0.01ms;
  }
}