:root {
  color-scheme: light;
  --bg: #f6f7f4;
  --surface: #ffffff;
  --surface-strong: #f0f4f8;
  --ink: #18212f;
  --muted: #667085;
  --line: #d7dde5;
  --blue: #2563eb;
  --green: #16745f;
  --amber: #b7791f;
  --rose: #b4235a;
  --shadow: 0 18px 45px rgba(24, 33, 47, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  letter-spacing: 0;
}

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

button {
  border: 0;
  cursor: pointer;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
}

.app-shell {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 22px clamp(18px, 4vw, 44px);
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.86);
  backdrop-filter: blur(12px);
}

.eyebrow {
  margin: 0 0 4px;
  color: var(--green);
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  margin: 0;
  letter-spacing: 0;
}

h1 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
}

h2 {
  font-size: 1rem;
}

.playback-status {
  min-width: 142px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 9px 13px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  color: var(--muted);
  font-size: 0.92rem;
}

.status-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--amber);
}

.status-dot.speaking {
  background: var(--green);
}

.workspace {
  flex: 1;
  display: grid;
  grid-template-columns: minmax(300px, 380px) minmax(0, 1fr);
  gap: 20px;
  padding: 20px clamp(18px, 4vw, 44px) 30px;
}

.source-panel,
.reader-panel {
  min-height: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.source-panel {
  display: flex;
  flex-direction: column;
  gap: 15px;
  padding: 18px;
}

.panel-heading,
.toolbar,
.word-card-header,
.source-actions,
.toolbar-buttons,
.phonetic-row {
  display: flex;
  align-items: center;
}

.panel-heading {
  justify-content: space-between;
}

.drop-zone {
  min-height: 112px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 8px;
  padding: 18px;
  border: 1px dashed #9aa7b5;
  border-radius: 8px;
  background: var(--surface-strong);
  transition: border-color 0.2s ease, background 0.2s ease;
}

.drop-zone.dragging {
  border-color: var(--blue);
  background: #eef5ff;
}

.drop-zone input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
}

.drop-title {
  color: var(--ink);
  font-weight: 800;
}

.drop-note,
.input-label {
  color: var(--muted);
  font-size: 0.88rem;
  line-height: 1.45;
}

textarea {
  min-height: 260px;
  resize: vertical;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px;
  color: var(--ink);
  line-height: 1.62;
  outline: none;
}

textarea:focus,
select:focus,
input:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.13);
}

.source-actions {
  gap: 10px;
  margin-top: auto;
}

.primary-button,
.secondary-button,
.selection-bar button {
  min-height: 40px;
  border-radius: 8px;
  padding: 0 14px;
  font-weight: 800;
}

.primary-button {
  background: var(--blue);
  color: #fff;
}

.secondary-button {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
}

.reader-panel {
  display: flex;
  flex-direction: column;
}

.toolbar {
  min-height: 70px;
  flex-wrap: wrap;
  gap: 12px;
  padding: 12px 14px;
  border-bottom: 1px solid var(--line);
  background: #fbfcfd;
}

.control-group {
  display: grid;
  gap: 5px;
}

.control-group label {
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 700;
}

.control-group select {
  min-width: 160px;
  height: 38px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
  padding: 0 10px;
}

.control-group.compact {
  min-width: 150px;
}

input[type="range"] {
  width: 150px;
  accent-color: var(--green);
}

.toolbar-buttons {
  gap: 8px;
  margin-left: auto;
}

.icon-button {
  width: 38px;
  height: 38px;
  display: inline-grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
  font-weight: 800;
}

.icon-button:hover,
.secondary-button:hover,
.selection-bar button:hover {
  border-color: #a8b4c3;
  background: #f7fafc;
}

.selection-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  border-bottom: 1px solid #e5e9ef;
  background: #fff8e7;
}

.selection-bar span {
  min-width: 0;
  flex: 1;
  color: #715118;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.selection-bar button {
  border: 1px solid #e6c46a;
  background: #fff;
  color: #715118;
}

.reader {
  flex: 1;
  min-height: 500px;
  overflow: auto;
  padding: clamp(20px, 3vw, 40px);
  line-height: 1.86;
  font-size: clamp(1.04rem, 1.6vw, 1.22rem);
  user-select: text;
}

.reader-placeholder {
  max-width: 560px;
  color: var(--muted);
}

.paragraph-block {
  max-width: 900px;
  margin: 0 0 26px;
}

.paragraph {
  position: relative;
  max-width: 880px;
  margin: 0;
  padding-left: 44px;
  user-select: text;
}

.paragraph-translation {
  margin: 10px 0 0 44px;
  padding: 10px 13px;
  border-left: 3px solid var(--green);
  background: #f7fbf8;
}

.paragraph-translation span {
  display: block;
  margin-bottom: 4px;
  color: var(--green);
  font-size: 0.76rem;
  font-weight: 800;
}

.paragraph-translation p {
  margin: 0;
  color: #2f3f53;
  font-size: 0.98rem;
  line-height: 1.72;
}

.paragraph-play {
  position: absolute;
  top: 5px;
  left: 0;
  width: 30px;
  height: 30px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--green);
  font-size: 0.8rem;
  font-weight: 800;
}

.word {
  border-radius: 4px;
  padding: 1px 2px;
  transition: background 0.12s ease;
  user-select: text;
}

.word:hover {
  background: #dfeafe;
}

.word.active {
  background: #c9f0e6;
}

.word-card {
  position: fixed;
  z-index: 20;
  right: 24px;
  bottom: 24px;
  width: min(360px, calc(100vw - 32px));
  max-height: min(520px, calc(100vh - 32px));
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: var(--shadow);
  padding: 16px;
}

.word-card-header {
  justify-content: space-between;
  gap: 12px;
}

.word-label {
  margin: 0 0 3px;
  color: var(--rose);
  font-size: 0.75rem;
  font-weight: 800;
  text-transform: uppercase;
}

.word-card h3 {
  font-size: 1.7rem;
}

.phonetic-row {
  gap: 10px;
  margin: 14px 0;
  color: var(--muted);
}

.audio-button {
  min-height: 34px;
  border-radius: 8px;
  background: #ecfdf5;
  color: var(--green);
  padding: 0 10px;
  font-weight: 800;
}

.definition-list {
  display: grid;
  gap: 12px;
  margin: 12px 0;
}

.definition-item {
  border-left: 3px solid var(--blue);
  padding-left: 10px;
}

.definition-heading {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 7px;
}

.definition-item span,
.meaning-row span {
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 800;
}

.pos-badge {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  border-radius: 6px;
  background: #eaf1ff;
  color: var(--blue) !important;
  padding: 0 8px;
}

.pos-name {
  text-transform: lowercase;
}

.definition-item p {
  margin: 4px 0 0;
  line-height: 1.5;
}

.definition-item ol {
  margin: 7px 0 0;
  padding-left: 20px;
}

.definition-item li {
  margin: 0 0 8px;
}

.local-meaning {
  color: var(--green);
  font-weight: 800;
}

.example-line {
  display: grid;
  gap: 4px;
  margin-top: 10px;
  padding: 9px 10px;
  border-radius: 8px;
  background: #f8fafc;
}

.example-line span {
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 800;
}

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

.meaning-row {
  display: grid;
  gap: 6px;
  margin: 0 0 14px;
  padding: 12px;
  border-radius: 8px;
  background: #ecfdf5;
  border: 1px solid #c8eadf;
}

.meaning-row strong {
  color: var(--green);
  line-height: 1.45;
}

.meaning-row small {
  color: var(--muted);
  line-height: 1.4;
}

@media (max-width: 920px) {
  .workspace {
    grid-template-columns: 1fr;
  }

  .source-panel {
    min-height: auto;
  }

  .reader {
    min-height: 420px;
  }
}

@media (max-width: 620px) {
  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .playback-status {
    width: 100%;
    justify-content: flex-start;
  }

  .source-actions,
  .toolbar,
  .selection-bar {
    align-items: stretch;
    flex-direction: column;
  }

  .toolbar-buttons,
  .source-actions {
    margin-left: 0;
  }

  .control-group select,
  input[type="range"],
  .primary-button,
  .secondary-button {
    width: 100%;
  }

  .reader {
    padding: 18px;
  }

  .paragraph {
    padding-left: 0;
  }

  .paragraph-translation {
    margin-left: 0;
  }

  .paragraph-play {
    position: static;
    margin-bottom: 8px;
  }
}