:root {
  color-scheme: light;
  --bg: #f5f7f4;
  --surface: #ffffff;
  --surface-strong: #eef3ef;
  --ink: #17211b;
  --muted: #5b665f;
  --line: #d9e1db;
  --accent: #17624b;
  --accent-strong: #0f4f3c;
  --danger: #a83232;
  --shadow: 0 18px 50px rgba(23, 33, 27, 0.08);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--ink);
}

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

.app-header,
main,
.site-footer {
  width: min(1180px, calc(100% - 32px));
  margin-inline: auto;
}

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 28px 0 18px;
}

.app-header h1,
.panel-heading h2,
.scenario-panel h2,
.script-card h3 {
  margin: 0;
  letter-spacing: 0;
}

.app-header h1 {
  font-size: clamp(28px, 4vw, 48px);
  line-height: 1.02;
}

.eyebrow {
  margin: 0 0 7px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

.header-actions,
.settings-toolbar {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.ghost-link,
.primary-button,
.secondary-button,
.danger-button,
.file-button,
.icon-button {
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  font-weight: 800;
  cursor: pointer;
}

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

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

.secondary-button,
.ghost-link,
.file-button,
.icon-button {
  color: var(--ink);
  background: var(--surface);
}

.danger-button {
  color: #fff;
  background: var(--danger);
  border-color: var(--danger);
}

.icon-button {
  width: 44px;
  padding: 0;
  font-size: 22px;
}

.control-band,
.tts-band,
.briefing-band,
.settings-login,
.settings-panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.control-band {
  display: grid;
  grid-template-columns: repeat(4, minmax(140px, 1fr)) auto;
  gap: 12px;
  padding: 16px;
  align-items: end;
}

.tts-band {
  margin-top: 16px;
  display: grid;
  grid-template-columns: minmax(260px, auto) minmax(220px, 1fr);
  gap: 12px;
  padding: 16px;
  align-items: center;
}

.tts-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items: end;
}

.tts-instructions {
  min-width: 0;
}

.tts-status {
  min-height: 20px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

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

.tts-status.ready {
  color: var(--accent);
}

.tts-status.loading {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.tts-status.loading::before {
  content: "";
  width: 14px;
  height: 14px;
  border: 2px solid var(--line);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: tts-spin 0.8s linear infinite;
}

@keyframes tts-spin {
  to {
    transform: rotate(360deg);
  }
}

label {
  display: grid;
  gap: 7px;
}

label span {
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
}

select,
input,
textarea {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  color: var(--ink);
}

select,
input {
  min-height: 42px;
  padding: 0 12px;
}

textarea {
  min-height: 260px;
  padding: 12px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 13px;
  line-height: 1.45;
  resize: vertical;
}

.briefing-band {
  margin-top: 16px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  overflow: hidden;
}

.demo-mode .header-actions,
.demo-mode .control-band label:not(:first-child),
.demo-mode .control-band .primary-button,
.demo-mode .briefing-band,
.demo-mode .scenario-panel,
.demo-mode #generateTtsButton {
  display: none;
}

.demo-mode .control-band {
  grid-template-columns: minmax(180px, 260px);
}

.demo-mode .tts-band {
  grid-template-columns: minmax(180px, auto) 1fr;
}

.briefing-item {
  padding: 18px;
  border-right: 1px solid var(--line);
}

.briefing-item:last-child {
  border-right: 0;
}

.briefing-item span {
  display: block;
  color: var(--muted);
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
}

.briefing-item strong {
  display: block;
  margin-top: 5px;
  font-size: 26px;
}

.practice-layout {
  margin-top: 18px;
}

.scenario-panel,
.script-panel {
  min-width: 0;
}

.scenario-panel {
  margin-top: 16px;
  background: var(--surface-strong);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 18px;
}

.scenario-panel h2 {
  font-size: 20px;
  margin-bottom: 15px;
}

#scenarioSummary {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 0 18px;
}

.summary-row {
  display: grid;
  gap: 4px;
  padding: 10px 0;
  border-top: 1px solid var(--line);
}

.summary-row span {
  color: var(--muted);
}

.summary-row strong {
  font-size: 17px;
}

.script-panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
  padding: 18px;
}

.panel-heading {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: start;
  margin-bottom: 14px;
}

.script-list {
  display: grid;
  gap: 12px;
}

.script-card {
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.script-card h3 {
  font-size: 18px;
  margin-bottom: 10px;
}

.scenario-card {
  align-items: start;
}

.dialogue-list {
  display: grid;
  gap: 9px;
}

.message-row {
  display: flex;
}

.message-row.service {
  justify-content: flex-start;
}

.message-row.pilot {
  justify-content: flex-end;
}

.message-bubble {
  width: min(82%, 680px);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 12px;
  background: #eef3f7;
}

.message-row.pilot .message-bubble {
  background: #e6f4ed;
}

.message-bubble.tts-active {
  outline: 3px solid rgba(23, 98, 75, 0.24);
  border-color: var(--accent);
}

.message-bubble span {
  display: block;
  color: var(--muted);
  font-size: 11px;
  font-weight: 900;
  text-transform: uppercase;
}

.message-bubble p {
  margin: 5px 0 0;
  line-height: 1.45;
}

.phrase {
  border-top: 1px solid var(--line);
  padding-top: 10px;
  margin-top: 10px;
}

.phrase span {
  display: inline-block;
  min-width: 58px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 900;
  text-transform: uppercase;
}

.phrase p {
  margin: 5px 0 0;
  line-height: 1.5;
}

.phrase .translation {
  color: var(--muted);
  font-size: 14px;
}

.settings-login,
.settings-panel {
  padding: 18px;
}

.settings-login {
  display: grid;
  grid-template-columns: minmax(220px, 360px) auto;
  gap: 12px;
  align-items: end;
  max-width: 560px;
}

.form-error,
.save-status {
  margin: 8px 0 0;
  color: var(--danger);
  font-weight: 800;
}

.save-status {
  color: var(--accent);
}

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

.settings-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
  border-bottom: 1px solid var(--line);
}

.settings-tab {
  border: 1px solid transparent;
  border-bottom: 0;
  border-radius: 8px 8px 0 0;
  background: transparent;
  color: var(--muted);
  padding: 10px 14px;
  font-weight: 900;
  cursor: pointer;
}

.settings-tab.active {
  background: var(--surface-strong);
  border-color: var(--line);
  color: var(--ink);
}

.settings-view {
  padding-top: 18px;
}

.settings-tree {
  display: grid;
  gap: 10px;
}

.settings-node {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.settings-node summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  cursor: pointer;
}

.settings-node summary strong {
  min-width: 160px;
}

.settings-node summary span {
  color: var(--muted);
}

.settings-fields {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  padding: 0 14px 14px;
  border-top: 1px solid var(--line);
}

.settings-fields label {
  padding-top: 12px;
}

.settings-fields textarea {
  min-height: 96px;
}

.settings-fields .template-input {
  min-height: 170px;
}

.message-editor-list {
  display: grid;
  gap: 10px;
  padding: 0 14px 14px;
}

.message-node {
  background: var(--surface-strong);
}

.hidden {
  display: none !important;
}

.editor-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  margin-top: 16px;
}

.file-button input {
  display: none;
}

.site-footer {
  color: var(--muted);
  font-size: 13px;
  padding: 28px 0 24px;
}

@media (max-width: 900px) {
  .control-band,
  .tts-band,
  .briefing-band,
  #scenarioSummary,
  .settings-fields,
  .editor-grid {
    grid-template-columns: 1fr;
  }

  .tts-status {
    grid-column: 1 / -1;
  }

  .briefing-item {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .briefing-item:last-child {
    border-bottom: 0;
  }
}

@media (max-width: 640px) {
  .app-header {
    align-items: flex-start;
    flex-direction: column;
  }

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

}

@media print {
  body {
    background: #fff;
  }

  .app-header,
  .control-band,
  .tts-band,
  .header-actions,
  .settings-toolbar {
    display: none !important;
  }

  main,
  .site-footer {
    width: auto;
    margin: 0;
  }

  .briefing-band,
  .practice-layout {
    display: block;
  }

  .briefing-band,
  .scenario-panel,
  .script-panel,
  .script-card {
    box-shadow: none;
    border-color: #999;
    break-inside: avoid;
  }

  .briefing-band {
    margin-bottom: 14px;
  }

  .briefing-item {
    display: inline-block;
    width: 24%;
    border: 0;
    padding: 8px;
    vertical-align: top;
  }

  .scenario-panel {
    margin-bottom: 14px;
  }

  .script-card {
    margin-bottom: 10px;
  }

  .message-bubble {
    width: 76%;
  }

  .site-footer {
    padding-top: 12px;
  }
}