:root {
  color-scheme: light;
  --bg: #edf2f4;
  --ink: #111827;
  --muted: #657282;
  --panel: #ffffff;
  --line: #d8e0e7;
  --accent: #0f766e;
  --accent-2: #e0a100;
  --danger: #c2410c;
  --ok: #15803d;
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", system-ui, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    linear-gradient(180deg, rgba(32, 58, 67, 0.10), transparent 280px),
    var(--bg);
}

button,
input,
textarea {
  font: inherit;
}

button {
  min-height: 44px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
  padding: 0 16px;
  cursor: pointer;
}

button.primary {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
  font-weight: 700;
}

button:disabled {
  opacity: 0.55;
  cursor: wait;
}

.app-shell {
  width: min(760px, 100%);
  min-height: 100vh;
  margin: 0 auto;
  padding: max(16px, env(safe-area-inset-top)) 14px 24px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 8px 2px 18px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  box-shadow: 0 10px 24px rgba(15, 118, 110, 0.25);
}

h1,
h2,
h3,
p {
  margin: 0;
}

h1 {
  font-size: 22px;
  line-height: 1.1;
}

.brand p {
  margin-top: 4px;
  color: var(--muted);
  font-size: 13px;
}

.status {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.75);
}

.status span {
  width: 12px;
  height: 12px;
  border-radius: 999px;
  background: var(--accent-2);
}

.status.online span {
  background: var(--ok);
}

.panel,
.quiz-card,
.result-panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 14px 35px rgba(17, 24, 39, 0.08);
}

.result-panel:not(.hidden):not(.grading) {
  animation: resultAutoHide 3s forwards;
  overflow: hidden;
}

.result-panel.ai-review:not(.hidden):not(.grading) {
  animation-duration: 3s;
}

.result-panel.grading {
  animation: none;
  opacity: 1;
  max-height: 240px;
  overflow: hidden;
}

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

@keyframes resultAutoHide {
  0%,
  88% {
    opacity: 1;
    max-height: 240px;
    margin-top: 12px;
    padding-top: 14px;
    padding-bottom: 14px;
  }
  100% {
    opacity: 0;
    max-height: 0;
    margin-top: 0;
    padding-top: 0;
    padding-bottom: 0;
    border-width: 0;
  }
}

.auth-panel {
  margin-top: 64px;
  padding: 28px;
}

.lock-mark {
  width: 58px;
  height: 58px;
  display: grid;
  place-items: center;
  margin-bottom: 16px;
  border-radius: 14px;
  background: #203a43;
  color: #fff;
  font-size: 24px;
  font-weight: 800;
}

.auth-panel h2 {
  font-size: 24px;
  margin-bottom: 18px;
}

.login-form {
  display: flex;
  gap: 10px;
}

.login-form input,
.answer-form input,
.field-label input,
.field-label select,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfdff;
  color: var(--ink);
  outline: none;
}

.login-form input,
.answer-form input,
.field-label input,
.field-label select {
  min-height: 48px;
  padding: 0 14px;
}

.field-label select {
  appearance: none;
}

textarea {
  min-height: 260px;
  resize: vertical;
  padding: 14px;
  line-height: 1.7;
}

.workspace.hidden,
.auth-panel.hidden,
.view {
  display: none;
}

.view.active,
.workspace {
  display: block;
}

.tabs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-bottom: 12px;
}

.tabs button {
  background: rgba(255, 255, 255, 0.72);
}

.tabs button.active {
  border-color: #203a43;
  background: #203a43;
  color: #fff;
}

.panel {
  padding: 14px;
}

.settings-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 150px;
  gap: 10px;
  margin-bottom: 12px;
}

.field-label {
  display: grid;
  gap: 6px;
}

.field-label span,
.meta-line {
  color: var(--muted);
  font-size: 13px;
}

.action-row {
  display: flex;
  gap: 10px;
  margin-top: 12px;
}

.action-row button {
  flex: 1;
}

.action-row.compact {
  margin-top: 10px;
}

.secondary-row button {
  min-height: 40px;
  color: #203a43;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-top: 12px;
}

.stats-grid div {
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.75);
}

.stats-grid strong {
  display: block;
  font-size: 24px;
}

.stats-grid span {
  color: var(--muted);
  font-size: 13px;
}

.quiz-card {
  padding: 16px;
}

.quiz-meta {
  display: flex;
  justify-content: space-between;
  color: var(--muted);
  font-size: 14px;
}

.word-display {
  display: grid;
  place-items: center;
  min-height: 180px;
  padding: 16px;
  font-size: clamp(42px, 15vw, 86px);
  font-weight: 800;
  text-align: center;
  overflow-wrap: anywhere;
}

.answer-form {
  display: flex;
  gap: 10px;
}

.answer-form button {
  flex: 0 0 104px;
}

.result-panel {
  margin-top: 12px;
  padding: 14px;
}

.result-title {
  font-weight: 800;
  font-size: 20px;
}

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

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

.result-gloss {
  margin-top: 8px;
  line-height: 1.55;
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 10px;
}

.chips span {
  border: 1px solid #bfd4d1;
  border-radius: 999px;
  background: #eef9f7;
  color: #115e59;
  padding: 6px 10px;
  font-size: 13px;
}

.wrong-list {
  display: grid;
  gap: 10px;
  margin-top: 12px;
}

.scope-tabs {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 8px;
  margin-bottom: 10px;
}

.scope-tabs button.active {
  border-color: #203a43;
  background: #203a43;
  color: #fff;
}

.meta-line {
  margin-top: 2px;
}

.wrong-item {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfdff;
}

.wrong-item h3 {
  font-size: 18px;
}

.wrong-item p {
  margin-top: 6px;
  color: var(--muted);
  line-height: 1.45;
}

.wrong-item strong {
  white-space: nowrap;
  color: var(--danger);
}

.error {
  min-height: 24px;
  margin-top: 10px;
  color: var(--danger);
}

@media (max-width: 560px) {
  .login-form,
  .answer-form {
    flex-direction: column;
  }

  .answer-form button {
    flex-basis: auto;
  }

  .settings-grid {
    grid-template-columns: 1fr;
  }
}