@import url("https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,600;9..144,700&family=IBM+Plex+Sans:wght@400;500;600&family=Source+Serif+4:opsz,wght@8..60,400;8..60,600&display=swap");

:root {
  color-scheme: light;
  --bg: #eef2ec;
  --ink: #1a211c;
  --muted: #5a645c;
  --accent: #1f6b4f;
  --accent-soft: #d7ebe1;
  --card: #fffdf8;
  --line: #d5ddd6;
  --danger: #8b2e2e;
  --ok: #1f6b4f;
  --font-display: "Fraunces", "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --font-body: "Source Serif 4", "Iowan Old Style", Georgia, serif;
  --font-ui: "IBM Plex Sans", "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: var(--font-body);
  color: var(--ink);
  background:
    radial-gradient(circle at 12% -10%, #cfe3d6 0%, transparent 40%),
    radial-gradient(circle at 100% 0%, #f1e4cf 0%, transparent 36%),
    linear-gradient(180deg, #f7f5ef 0%, var(--bg) 55%);
}

.app {
  max-width: 44rem;
  margin: 0 auto;
  padding: 1.5rem 1.1rem 2.5rem;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 0.85rem;
  font-family: var(--font-ui);
  font-size: 0.88rem;
  font-weight: 500;
  margin-bottom: 1rem;
}

.site-nav a {
  color: var(--muted);
  text-decoration: none;
}

.site-nav a:hover {
  color: var(--accent);
  text-decoration: underline;
}

.site-nav a[aria-current="page"] {
  color: var(--accent);
  font-weight: 600;
  text-decoration: none;
}

html.embed-mode .site-nav {
  display: none;
}

.top {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: flex-start;
  margin-bottom: 1.25rem;
}

.header-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  justify-content: flex-end;
}

h1,
h2 {
  font-family: var(--font-display);
  letter-spacing: -0.02em;
  margin: 0 0 0.4rem;
}

h1 {
  font-size: clamp(2rem, 5vw, 2.7rem);
  color: var(--accent);
}

h2 {
  font-size: 1.35rem;
}

.muted {
  color: var(--muted);
  line-height: 1.45;
}

.panel {
  background: color-mix(in srgb, var(--card) 92%, white);
  border: 1px solid var(--line);
  border-radius: 1rem;
  padding: 1.1rem 1.15rem 1.25rem;
  box-shadow: 0 10px 30px rgba(26, 33, 28, 0.05);
}

.fields {
  display: grid;
  gap: 0.85rem;
}

.field {
  display: grid;
  gap: 0.35rem;
  font-family: var(--font-ui);
  font-size: 0.92rem;
}

.field span {
  color: var(--muted);
  font-weight: 500;
}

select,
input[type="text"] {
  font: inherit;
  font-family: var(--font-ui);
  padding: 0.65rem 0.7rem;
  border-radius: 0.55rem;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
}

.btn,
.btn-close,
.wordPairBtn,
.nextInlineBtn {
  font-family: var(--font-ui);
  font-size: 0.95rem;
  border-radius: 0.55rem;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  padding: 0.6rem 0.9rem;
  cursor: pointer;
}

.btn:disabled,
.nextInlineBtn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 600;
}

.btn.ghost {
  background: transparent;
}

.row {
  display: flex;
  gap: 0.6rem;
  align-items: center;
  margin-top: 0.9rem;
}

.row.spread {
  justify-content: space-between;
}

.row.right {
  justify-content: flex-end;
}

.status {
  font-family: var(--font-ui);
  font-size: 0.9rem;
  color: var(--muted);
}

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

.status.err {
  color: var(--danger);
}

.readingBox {
  margin-top: 0.8rem;
  padding: 1rem 1.05rem;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 0.75rem;
  line-height: 1.7;
  font-size: 1.08rem;
  min-height: 10rem;
}

.line {
  margin-bottom: 0.55rem;
}

.wordPair {
  display: inline-flex;
  gap: 0.25rem;
  vertical-align: baseline;
  margin: 0 0.1rem;
}

.wordPairBtn {
  padding: 0.12rem 0.45rem;
  font-size: 0.95em;
  border-radius: 0.35rem;
  background: var(--accent-soft);
  border-color: color-mix(in srgb, var(--accent) 25%, var(--line));
}

.wordPairBtn.selected {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.nextInlineBtn {
  margin-left: 0.45rem;
  padding: 0.2rem 0.7rem;
  font-size: 0.9rem;
  font-weight: 600;
  transition:
    transform 0.2s ease,
    box-shadow 0.2s ease,
    border-color 0.2s ease,
    background 0.2s ease;
}

.nextInlineBtn.ready,
.btn.primary.ready {
  background: var(--accent);
  border: 2px solid color-mix(in srgb, var(--accent) 70%, #0a3d2e);
  color: #fff;
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 28%, transparent);
  animation: nextPulse 1.25s ease-in-out infinite;
}

@keyframes nextPulse {
  0%,
  100% {
    transform: scale(1);
    box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 22%, transparent);
  }
  50% {
    transform: scale(1.06);
    box-shadow: 0 0 0 6px color-mix(in srgb, var(--accent) 35%, transparent);
  }
}

@media (prefers-reduced-motion: reduce) {
  .nextInlineBtn.ready,
  .btn.primary.ready {
    animation: none;
  }
}

.result {
  font-family: var(--font-ui);
  line-height: 1.5;
}

.result .score {
  font-size: 1.35rem;
  font-family: var(--font-display);
  margin: 0.4rem 0 0.8rem;
}

.result .item {
  padding: 0.55rem 0;
  border-top: 1px solid var(--line);
}

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

.result .bad {
  color: var(--danger);
}

.hidden {
  display: none !important;
}

.modal {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  z-index: 40;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(20, 28, 22, 0.4);
}

.modal-panel {
  position: relative;
  width: min(32rem, calc(100% - 1.5rem));
  background: var(--card);
  border-radius: 0.9rem;
  border: 1px solid var(--line);
  padding: 1rem 1.1rem 1.2rem;
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
}

.btn-close {
  width: 2rem;
  height: 2rem;
  padding: 0;
  font-size: 1.3rem;
  line-height: 1;
}

.modal-body p {
  color: var(--muted);
  margin: 0.7rem 0 0;
}

.modal-panel.history-panel {
  width: min(40rem, calc(100% - 1.5rem));
  max-height: min(88vh, 52rem);
  display: flex;
  flex-direction: column;
}

.modal-panel.history-panel .modal-body {
  overflow: auto;
  padding-right: 0.15rem;
}

.history-note {
  margin-top: 0 !important;
  font-family: var(--font-ui);
  font-size: 0.9rem;
}

.history-summary {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.55rem;
  margin: 0.9rem 0 1rem;
  font-family: var(--font-ui);
}

.history-summary .stat {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 0.55rem;
  padding: 0.55rem 0.65rem;
}

.history-summary .stat strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.2rem;
  color: var(--accent);
}

.history-summary .stat span {
  color: var(--muted);
  font-size: 0.82rem;
}

.history-chart-wrap {
  margin: 0 0 1rem;
  padding: 0.75rem 0.7rem 0.65rem;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 0.65rem;
}

.chart-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  margin-bottom: 0.55rem;
  font-family: var(--font-ui);
}

.chart-label {
  font-weight: 600;
  color: var(--ink);
}

.chart-toggles {
  display: flex;
  flex-wrap: wrap;
  gap: 0.3rem;
}

.chart-toggle {
  font-family: var(--font-ui);
  font-size: 0.82rem;
  padding: 0.28rem 0.55rem;
  border-radius: 0.4rem;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--muted);
  cursor: pointer;
}

.chart-toggle.active {
  background: var(--accent-soft);
  border-color: color-mix(in srgb, var(--accent) 35%, var(--line));
  color: var(--accent);
  font-weight: 600;
}

#historyChart {
  display: block;
  width: 100%;
  height: auto;
  max-height: 220px;
}

.chart-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.1rem;
  margin-top: 0.45rem;
  font-family: var(--font-ui);
  font-size: 0.8rem;
  color: var(--muted);
}

.chart-legend .leg::before {
  content: "";
  display: inline-block;
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 0.15rem;
  margin-right: 0.35rem;
  vertical-align: -0.05rem;
}

.chart-legend .leg.speed::before {
  background: var(--accent);
}

.chart-legend .leg.score::before {
  background: #c47a3a;
}

.history-chart-wrap.mode-speed .leg.score,
.history-chart-wrap.mode-score .leg.speed {
  opacity: 0.35;
}

.history-list {
  display: grid;
  gap: 0.45rem;
  margin-bottom: 1rem;
}

.history-item {
  font-family: var(--font-ui);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 0.55rem;
  padding: 0.65rem 0.75rem;
}

.history-item.clickable {
  cursor: pointer;
  text-align: left;
  width: 100%;
}

.history-item.clickable:hover,
.history-item.clickable:focus-visible {
  border-color: color-mix(in srgb, var(--accent) 40%, var(--line));
  background: color-mix(in srgb, var(--accent-soft) 45%, #fff);
}

.history-item .title {
  font-weight: 600;
  margin-bottom: 0.2rem;
}

.history-item .meta {
  color: var(--muted);
  font-size: 0.86rem;
  line-height: 1.4;
}

.history-item .hint {
  margin-top: 0.35rem;
  font-size: 0.8rem;
  color: var(--accent);
}

.review-box .wordPairBtn {
  cursor: default;
  pointer-events: none;
}

.review-box .wordPairBtn.correct {
  background: color-mix(in srgb, var(--ok) 22%, #fff);
  border-color: var(--ok);
  color: var(--ok);
}

.review-box .wordPairBtn.wrong {
  background: color-mix(in srgb, var(--danger) 16%, #fff);
  border-color: var(--danger);
  color: var(--danger);
  text-decoration: line-through;
}

.review-box .wordPairBtn.missed {
  outline: 2px dashed color-mix(in srgb, var(--ok) 55%, transparent);
  outline-offset: 1px;
}

.review-actions {
  flex-wrap: wrap;
}

.history-empty {
  font-family: var(--font-ui);
  color: var(--muted);
  padding: 0.5rem 0 0.8rem;
}

.generating-panel {
  min-height: 16rem;
  display: grid;
  place-items: center;
}

.generating-panel.hidden {
  display: none !important;
}

.generating-card {
  width: min(100%, 26rem);
  text-align: center;
  padding: 1.25rem 0.5rem;
}

.generating-spinner {
  width: 2.75rem;
  height: 2.75rem;
  margin: 0 auto 1rem;
  border-radius: 50%;
  border: 3px solid color-mix(in srgb, var(--accent) 22%, var(--line));
  border-top-color: var(--accent);
  animation: genSpin 0.85s linear infinite;
}

.generating-title {
  margin: 0 0 0.55rem;
  color: var(--accent);
}

.generating-hint {
  margin: 0 0 0.9rem;
  color: var(--muted);
  line-height: 1.5;
  font-size: 1.02rem;
}

.generating-detail {
  font-family: var(--font-ui);
  font-size: 0.92rem;
  color: var(--ink);
  padding: 0.55rem 0.75rem;
  border-radius: 0.5rem;
  background: color-mix(in srgb, var(--accent-soft) 70%, #fff);
  border: 1px solid color-mix(in srgb, var(--accent) 20%, var(--line));
}

@keyframes genSpin {
  to {
    transform: rotate(360deg);
  }
}

@media (prefers-reduced-motion: reduce) {
  .generating-spinner {
    animation: none;
    border-top-color: color-mix(in srgb, var(--accent) 22%, var(--line));
    background: conic-gradient(from 0deg, var(--accent), transparent);
  }
}

.history-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
}

.import-label {
  display: inline-flex;
  align-items: center;
  cursor: pointer;
}

@media (max-width: 560px) {
  .history-summary {
    grid-template-columns: 1fr;
  }
}

html.embed-mode body {
  background: #fff;
}

html.embed-mode .app {
  max-width: none;
  padding: 0.75rem;
}

html.embed-mode .top .muted {
  display: none;
}

html.embed-mode h1 {
  font-size: 1.55rem;
}