:root {
  color-scheme: light;
  --page: #eef2ee;
  --surface: #ffffff;
  --surface-soft: #f8faf6;
  --surface-warm: #fbf6ef;
  --ink: #1d2527;
  --muted: #68747b;
  --line: #d5ded4;
  --line-strong: #bdcbbf;
  --accent: #286e63;
  --accent-strong: #164f47;
  --accent-soft: rgba(40, 110, 99, 0.1);
  --blue: #2d5f86;
  --amber: #966122;
  --danger: #aa3434;
  --shadow: 0 18px 38px rgba(32, 45, 39, 0.11);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.64), rgba(255, 255, 255, 0) 180px),
    var(--page);
  color: var(--ink);
  font-family: "Segoe UI", "Microsoft YaHei", Arial, sans-serif;
  font-size: 15px;
  overflow-x: hidden;
}

html {
  -webkit-text-size-adjust: 100%;
}

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

button {
  user-select: none;
}

.app-shell {
  min-height: 100vh;
  padding: 22px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  max-width: 1440px;
  margin: 0 auto 18px;
}

.topbar h1 {
  margin: 0;
  font-size: 26px;
  font-weight: 760;
}

.compact-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.topbar p,
.panel-header p,
#textStats,
#runStatus {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.workspace {
  display: grid;
  grid-template-columns: minmax(280px, 330px) minmax(420px, 1fr) minmax(320px, 380px);
  gap: 16px;
  max-width: 1440px;
  margin: 0 auto;
  align-items: start;
}

.side-panel,
.editor-panel,
.output-panel {
  min-width: 0;
}

.panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.side-panel,
.editor-panel,
.output-panel {
  padding: 16px;
}

.mobile-section-toggle {
  display: none;
}

.mobile-submit-button {
  display: none;
}

.assist-panel,
.history-content {
  display: block;
}

.side-panel,
.output-panel {
  position: sticky;
  top: 16px;
}

.field {
  display: grid;
  gap: 8px;
  margin-bottom: 15px;
}

.security-box {
  display: grid;
  gap: 10px;
  margin-bottom: 15px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--surface-warm);
  padding: 12px;
}

.security-box strong,
.security-box span {
  display: block;
}

.security-box span {
  color: var(--muted);
  font-size: 12px;
  margin-top: 3px;
}

.security-box.blocked {
  border-color: rgba(170, 52, 52, 0.28);
  background: #fff6f4;
}

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

.token-field input {
  width: 100%;
  min-height: 38px;
  border: 1px solid var(--line);
  border-radius: 7px;
  padding: 8px 10px;
  outline: none;
}

label,
.field > label {
  color: var(--ink);
  font-size: 13px;
  font-weight: 680;
}

.label-row,
.panel-header,
.preset-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.panel-header {
  margin-bottom: 12px;
}

.panel-header h2,
.preset-header h3 {
  margin: 0;
}

.panel-header h2 {
  font-size: 18px;
}

.preset-header h3 {
  font-size: 14px;
}

select,
textarea,
input[type="file"] {
  width: 100%;
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: #fff;
  color: var(--ink);
  padding: 9px 10px;
  outline: none;
}

input,
select,
textarea {
  font-size: 16px;
}

textarea {
  resize: vertical;
  line-height: 1.55;
}

#text {
  min-height: 300px;
  margin-bottom: 12px;
  font-size: 16px;
}

select:focus,
textarea:focus,
input[type="file"]:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(40, 110, 99, 0.12);
}

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

.segments label {
  display: flex;
  min-height: 42px;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--surface-soft);
  color: var(--muted);
  cursor: pointer;
  padding: 0 10px;
}

.segments label.active,
.segments label:has(input:checked) {
  border-color: rgba(40, 110, 99, 0.42);
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.segments input {
  accent-color: var(--accent);
}

.primary-button,
.mobile-submit-button,
.secondary-button,
.ghost-button,
.mobile-section-toggle,
.text-button,
.tool-strip button,
.chips button,
.history-item {
  min-height: 38px;
  border: 1px solid transparent;
  border-radius: 7px;
  cursor: pointer;
  text-align: center;
  text-decoration: none;
}

.primary-button {
  width: 100%;
  min-height: 44px;
  background: var(--accent);
  color: #fff;
  font-weight: 760;
}

.mobile-submit-button {
  width: 100%;
  min-height: 44px;
  margin: 0 0 12px;
  background: var(--accent);
  color: #fff;
  font-weight: 760;
}

.primary-button:hover {
  background: var(--accent-strong);
}

.primary-button:disabled {
  background: #97a6a1;
  cursor: not-allowed;
}

.secondary-button,
.ghost-button {
  background: #fff;
  border-color: var(--line);
  color: var(--ink);
  padding: 8px 12px;
}

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

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

.secondary-button.disabled {
  color: #9aa2a7;
  pointer-events: none;
}

.text-button {
  min-height: auto;
  background: transparent;
  border: 0;
  color: var(--accent);
  padding: 2px 0;
}

.status-pill {
  min-width: 126px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface);
  color: var(--muted);
  text-align: center;
  white-space: nowrap;
}

.status-pill.ready {
  border-color: rgba(40, 110, 99, 0.28);
  color: var(--accent-strong);
}

.status-pill.missing {
  border-color: rgba(150, 97, 34, 0.34);
  color: var(--amber);
}

.tool-strip,
.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tool-strip {
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 16px;
}

.tool-strip button,
.chips button {
  background: var(--surface-soft);
  border-color: var(--line);
  color: var(--ink);
  padding: 7px 10px;
}

.tool-strip button:hover,
.chips button:hover {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.chips button.active {
  border-color: rgba(40, 110, 99, 0.42);
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.preset-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.preset-grid section {
  min-width: 0;
}

.actions {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

#audioPlayer {
  width: 100%;
  min-height: 44px;
  margin-bottom: 12px;
}

.metadata {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin: 14px 0 0;
}

.metadata div {
  border: 1px solid var(--line);
  border-radius: 7px;
  padding: 10px;
  background: var(--surface-warm);
  min-width: 0;
}

.metadata dt {
  color: var(--muted);
  font-size: 12px;
  margin-bottom: 4px;
}

.metadata dd {
  margin: 0;
  overflow-wrap: anywhere;
}

.error-box {
  margin: 14px 0 0;
  max-height: 180px;
  overflow: auto;
  white-space: pre-wrap;
  border: 1px solid rgba(170, 52, 52, 0.25);
  border-radius: 7px;
  background: #fff6f4;
  color: var(--danger);
  padding: 12px;
}

.history-section {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.history-list {
  display: grid;
  gap: 8px;
  max-height: 330px;
  overflow: auto;
}

.history-empty {
  color: var(--muted);
  border: 1px dashed var(--line-strong);
  border-radius: 7px;
  padding: 12px;
  text-align: center;
}

.history-item {
  display: grid;
  gap: 4px;
  width: 100%;
  background: var(--surface-soft);
  border-color: var(--line);
  color: var(--ink);
  padding: 10px;
  text-align: left;
}

.history-item:hover {
  border-color: var(--accent);
}

.history-item strong {
  font-size: 13px;
}

.history-item span {
  color: var(--muted);
  font-size: 12px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.hidden {
  display: none;
}

@media (max-width: 1180px) {
  .workspace {
    grid-template-columns: minmax(280px, 330px) 1fr;
  }

  .output-panel {
    grid-column: 1 / -1;
    position: static;
  }
}

@media (max-width: 820px) {
  .app-shell {
    padding: 14px;
  }

  .topbar,
  .topbar-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .workspace,
  .preset-grid,
  .metadata,
  .actions {
    grid-template-columns: 1fr;
  }

  .side-panel,
  .output-panel {
    position: static;
  }

  .editor-panel {
    order: 1;
  }

  .output-panel {
    order: 2;
  }

  .side-panel {
    order: 3;
  }
}

@media (max-width: 640px) {
  body {
    font-size: 14px;
  }

  .app-shell {
    padding: 10px;
  }

  .topbar {
    gap: 10px;
    margin-bottom: 10px;
  }

  .topbar h1 {
    font-size: 22px;
  }

  .topbar p {
    display: none;
  }

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

  #randomButton {
    display: none;
  }

  .status-pill,
  .ghost-button {
    width: 100%;
  }

  .workspace {
    gap: 10px;
  }

  .panel {
    border-radius: 7px;
    box-shadow: none;
  }

  .editor-panel {
    border-color: var(--line-strong);
  }

  .side-panel,
  .editor-panel,
  .output-panel {
    padding: 12px;
  }

  .side-panel {
    display: block;
    padding: 0;
    overflow: hidden;
  }

  .mobile-section-toggle {
    display: flex;
    width: 100%;
    min-height: 46px;
    align-items: center;
    justify-content: space-between;
    background: var(--surface);
    border: 0;
    border-radius: 0;
    color: var(--ink);
    font-weight: 760;
    padding: 0 12px;
  }

  .mobile-submit-button {
    display: block;
  }

  .mobile-section-toggle::after {
    content: "+";
    color: var(--accent);
    font-size: 20px;
    line-height: 1;
  }

  .side-panel.open .mobile-section-toggle::after {
    content: "-";
  }

  .assist-toggle,
  .history-toggle {
    border-top: 1px solid var(--line);
    margin-top: 10px;
  }

  #ttsForm {
    display: none;
    padding: 0 12px 12px;
  }

  .side-panel.open #ttsForm {
    display: block;
  }

  .assist-panel,
  .history-content {
    display: none;
  }

  .editor-panel.assist-open .assist-panel,
  .history-section.history-open .history-content {
    display: block;
  }

  .editor-panel.assist-open .assist-toggle::after,
  .history-section.history-open .history-toggle::after {
    content: "-";
  }

  .side-panel .field {
    margin-bottom: 12px;
  }

  .security-box {
    padding: 10px;
  }

  .segments {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 6px;
  }

  .segments label {
    min-height: 40px;
    justify-content: center;
    padding: 0 6px;
    font-size: 13px;
  }

  .segments input {
    display: none;
  }

  .panel-header {
    align-items: flex-start;
    flex-wrap: wrap;
  }

  .panel-header h2 {
    font-size: 17px;
  }

  .compact-actions {
    width: 100%;
    justify-content: flex-start;
  }

  #text {
    min-height: 220px;
  }

  #style,
  #voicePrompt {
    min-height: 92px;
  }

  .tool-strip {
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: 10px;
    margin-bottom: 12px;
    scrollbar-width: thin;
  }

  .tool-strip button {
    flex: 0 0 auto;
    min-width: 64px;
  }

  .chips {
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: 2px;
    scrollbar-width: thin;
  }

  .chips button {
    flex: 0 0 auto;
    max-width: 170px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .history-section {
    margin-top: 12px;
    padding-top: 0;
  }

  .history-list {
    max-height: 230px;
  }
}

@media (max-width: 420px) {
  .app-shell {
    padding: 8px;
  }

  .topbar h1 {
    font-size: 20px;
  }

  .topbar p,
  .panel-header p,
  #textStats,
  #runStatus {
    font-size: 12px;
  }

  .segments label {
    font-size: 12px;
  }

  .primary-button,
  .secondary-button,
  .ghost-button {
    min-height: 42px;
    padding: 8px 10px;
  }

  #text {
    min-height: 190px;
  }

  .label-row,
  .panel-header,
  .preset-header {
    gap: 8px;
  }
}