:root {
  color-scheme: light;
  --bg: #f5f7f4;
  --panel: #ffffff;
  --panel-soft: #eef3ef;
  --ink: #1c2520;
  --muted: #65736a;
  --line: #d7dfd8;
  --accent: #2f6f5f;
  --accent-dark: #214f45;
  --accent-soft: #dcebe6;
  --warn: #a45d25;
  --success: #28704a;
  --error: #aa3d3d;
  --shadow: 0 22px 60px rgba(45, 61, 50, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    linear-gradient(180deg, rgba(245, 247, 244, 0.92), rgba(245, 247, 244, 1)),
    repeating-linear-gradient(90deg, rgba(47, 111, 95, 0.04) 0 1px, transparent 1px 80px);
  color: var(--ink);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

button,
input,
textarea {
  font: inherit;
}

button {
  cursor: pointer;
}

.app-shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 32px 0;
}

.topbar {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 18px;
}

.eyebrow,
.deck-kicker,
.section-label,
.prompt-label {
  margin: 0;
  color: var(--accent-dark);
  font-size: 12px;
  font-weight: 760;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2 {
  margin: 0;
  letter-spacing: 0;
}

h1 {
  margin-top: 6px;
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.04;
}

h2 {
  font-size: 24px;
  line-height: 1.2;
}

.daily-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(88px, 1fr));
  gap: 8px;
  min-width: 360px;
}

.daily-stats span {
  min-height: 58px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.78);
  color: var(--muted);
  display: grid;
  place-items: center;
  padding: 8px;
  text-align: center;
}

.daily-stats strong {
  color: var(--ink);
  font-size: 22px;
}

.workspace {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr) 300px;
  gap: 16px;
  align-items: start;
}

.sidebar,
.practice-panel,
.word-bank {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: var(--shadow);
}

.sidebar,
.word-bank {
  padding: 16px;
}

.practice-panel {
  padding: 22px;
  min-height: 590px;
}

.deck-list {
  display: grid;
  gap: 8px;
  margin-top: 10px;
}

.cloud-status {
  min-height: 18px;
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.4;
}

.deck-button,
.mode-button,
.ghost-button,
.secondary-button,
.primary-button,
.sound-button {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  color: var(--ink);
  min-height: 42px;
  transition:
    border-color 160ms ease,
    background 160ms ease,
    transform 160ms ease;
}

.deck-button {
  display: grid;
  gap: 3px;
  width: 100%;
  padding: 11px 12px;
  text-align: left;
}

.deck-button strong {
  font-size: 14px;
}

.deck-button span {
  color: var(--muted);
  font-size: 12px;
}

.deck-button.active,
.mode-button.active {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.deck-button:hover,
.mode-button:hover,
.ghost-button:hover,
.secondary-button:hover,
.sound-button:hover {
  border-color: var(--accent);
}

.spaced {
  margin-top: 22px;
}

.mode-switch {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6px;
  margin-top: 10px;
}

.count-control {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 58px 72px;
  gap: 8px;
  margin-top: 10px;
}

.count-control input {
  min-height: 42px;
  font-size: 16px;
}

.ghost-button {
  width: 100%;
  margin-top: 18px;
}

.ghost-button.compact {
  margin-top: 0;
}

.import-panel {
  display: grid;
  gap: 9px;
  margin-top: 12px;
  border-top: 1px solid var(--line);
  padding-top: 14px;
}

.import-panel[hidden] {
  display: none;
}

.import-panel label {
  color: var(--muted);
  font-size: 12px;
  font-weight: 720;
}

.import-panel input {
  min-height: 40px;
  font-size: 14px;
}

.import-panel input[type="file"] {
  border: 0;
  padding: 0;
  min-height: 0;
  background: transparent;
  font-size: 12px;
}

.import-panel textarea {
  width: 100%;
  resize: vertical;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  color: var(--ink);
  padding: 10px 12px;
  outline: none;
  font-size: 13px;
}

.import-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.import-actions .primary-button,
.import-actions .secondary-button {
  min-width: 0;
}

.import-status {
  min-height: 18px;
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.4;
}

.sync-panel {
  display: grid;
  gap: 8px;
  margin-top: 10px;
}

.sync-panel input {
  min-height: 40px;
  font-size: 14px;
}

.sync-actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.sync-actions .primary-button,
.sync-actions .secondary-button {
  min-width: 0;
}

.sync-status {
  min-height: 18px;
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.4;
}

.practice-head,
.word-bank-head,
.progress-meta,
.answer-row,
.action-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.sound-button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 0 14px;
  white-space: nowrap;
}

.prompt-box {
  min-height: 190px;
  margin-top: 28px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(220, 235, 230, 0.55), rgba(255, 255, 255, 0.86)),
    var(--panel);
  padding: 22px;
}

.prompt-text {
  margin: 16px 0 0;
  font-size: clamp(28px, 5vw, 46px);
  font-weight: 760;
  line-height: 1.12;
}

.prompt-text.compact {
  font-size: 24px;
  line-height: 1.36;
}

.meta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
  min-height: 28px;
}

.meta-row span {
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.7);
  color: var(--accent-dark);
  font-size: 13px;
  font-weight: 720;
  padding: 5px 9px;
}

.example-text {
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.55;
}

.answer-form {
  margin-top: 24px;
}

.answer-form label {
  display: block;
  margin-bottom: 8px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 680;
}

.answer-row {
  align-items: stretch;
}

input {
  width: 100%;
  min-height: 54px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
  color: var(--ink);
  font-size: 22px;
  padding: 0 14px;
  outline: none;
}

input:focus,
textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(47, 111, 95, 0.12);
}

.primary-button {
  min-width: 96px;
  border-color: var(--accent);
  background: var(--accent);
  color: white;
  font-weight: 760;
}

.feedback {
  min-height: 46px;
  margin-top: 12px;
  font-weight: 720;
}

.feedback.good {
  color: var(--success);
}

.feedback.bad {
  color: var(--error);
}

.feedback.neutral {
  color: var(--warn);
}

.session-summary {
  margin-top: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel-soft);
  padding: 16px;
}

.summary-head,
.summary-stats,
.summary-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.summary-head {
  justify-content: space-between;
}

.summary-head h3 {
  margin: 4px 0 0;
  font-size: 20px;
  line-height: 1.25;
}

#summaryAccuracy {
  color: var(--accent-dark);
  font-size: 28px;
  font-weight: 780;
}

.summary-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 12px;
}

.summary-stats span {
  min-height: 58px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.72);
  color: var(--muted);
  display: grid;
  place-items: center;
  padding: 8px;
  text-align: center;
}

.summary-stats strong {
  color: var(--ink);
  font-size: 22px;
}

.summary-wrong-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}

.summary-wrong-list span {
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--panel);
  color: var(--muted);
  font-size: 13px;
  padding: 6px 9px;
}

.summary-actions {
  flex-wrap: wrap;
  margin-top: 14px;
}

.summary-actions .primary-button,
.summary-actions .secondary-button {
  min-width: 128px;
  padding: 0 14px;
}

.action-row {
  justify-content: flex-start;
  margin-top: 8px;
  flex-wrap: wrap;
}

.secondary-button {
  min-width: 92px;
  padding: 0 14px;
}

.progress-wrap {
  margin-top: 34px;
}

.progress-meta {
  color: var(--muted);
  font-size: 13px;
  margin-bottom: 8px;
}

.progress-track {
  height: 10px;
  overflow: hidden;
  border-radius: 99px;
  background: var(--panel-soft);
}

.progress-fill {
  width: 0%;
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--accent), #7b8f5e);
  transition: width 220ms ease;
}

.word-bank-head {
  align-items: start;
}

.word-bank-head h2 {
  margin-top: 4px;
  font-size: 19px;
}

#bankCount {
  color: var(--muted);
  font-size: 12px;
}

.word-list {
  display: grid;
  gap: 8px;
  margin-top: 14px;
  max-height: 508px;
  overflow: auto;
  padding-right: 4px;
}

.word-chip {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 9px 10px;
  background: var(--panel);
  font-size: 13px;
  text-align: left;
}

.word-chip span {
  min-width: 0;
  color: var(--muted);
  overflow-wrap: anywhere;
  text-align: right;
}

.word-chip.done {
  border-color: rgba(40, 112, 74, 0.4);
  background: rgba(220, 235, 230, 0.65);
}

.word-chip.hidden-answer {
  border-style: dashed;
  background: var(--panel-soft);
}

.word-chip.hidden-answer strong,
.word-chip.hidden-answer span {
  color: var(--muted);
}

@media (max-width: 980px) {
  .topbar {
    align-items: stretch;
    flex-direction: column;
  }

  .daily-stats {
    min-width: 0;
  }

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

  .sidebar {
    display: grid;
    grid-template-columns: 1fr;
  }

  .word-bank {
    order: 3;
  }
}

@media (max-width: 640px) {
  .app-shell {
    width: min(100% - 20px, 1180px);
    padding: 16px 0;
  }

  .daily-stats {
    grid-template-columns: 1fr;
  }

  .practice-panel {
    padding: 16px;
    min-height: 0;
  }

  .practice-head,
  .answer-row,
  .summary-head {
    align-items: stretch;
    flex-direction: column;
  }

  .sound-button,
  .primary-button {
    justify-content: center;
    width: 100%;
  }

  .prompt-box {
    margin-top: 18px;
    min-height: 170px;
    padding: 18px;
  }

  .summary-stats {
    grid-template-columns: 1fr;
  }
}