:root {
  --color-bg: #12151c;
  --color-surface: #1c212b;
  --color-border: #2c3340;
  --color-text: #e5e9f0;
  --color-text-muted: #9aa4b2;
  --color-primary: #4f8cff;
  --color-error: #ff5c6c;
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.5;
}

.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--color-border);
}

.app-header h1 {
  font-size: 1.25rem;
  margin: 0;
}

.app-nav {
  display: flex;
  gap: 0.5rem;
}

.app-nav button {
  background: transparent;
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 0.4rem 0.8rem;
  cursor: pointer;
}

.app-nav button:hover {
  color: var(--color-text);
  border-color: var(--color-primary);
}

main {
  max-width: 760px;
  margin: 0 auto;
  padding: 1.5rem;
}

.screen {
  display: none;
}

.screen.is-active {
  display: block;
}

label {
  display: block;
  margin: 0.75rem 0 0.25rem;
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

textarea,
select,
input {
  width: 100%;
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 0.6rem;
  font-family: inherit;
  font-size: 0.95rem;
}

.setup-filters {
  display: flex;
  gap: 1rem;
  margin-top: 0.5rem;
}

.setup-filters > div {
  flex: 1;
}

.button-row {
  display: flex;
  gap: 0.6rem;
  margin-top: 1rem;
  flex-wrap: wrap;
}

button {
  background: var(--color-surface);
  color: var(--color-text);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 0.55rem 1rem;
  cursor: pointer;
  font-size: 0.95rem;
}

button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

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

.question-text {
  font-size: 1.1rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1rem;
}

.error-banner {
  display: none;
  background: rgba(255, 92, 108, 0.12);
  color: var(--color-error);
  border: 1px solid var(--color-error);
  border-radius: var(--radius);
  padding: 0.6rem 0.8rem;
  margin: 0.5rem 0;
}

.error-banner.is-visible {
  display: block;
}

.answer-panel {
  display: none;
}

.answer-panel.is-active {
  display: block;
}

.voice-transcript {
  min-height: 3rem;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 0.75rem;
}

.feedback-container {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1rem;
}

.rubric-scores {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.rubric-score {
  background: rgba(79, 140, 255, 0.1);
  border-radius: var(--radius);
  padding: 0.5rem 0.75rem;
}

.rubric-block {
  margin-bottom: 1rem;
}

.feedback-error pre {
  white-space: pre-wrap;
  word-break: break-word;
  background: rgba(0, 0, 0, 0.3);
  padding: 0.75rem;
  border-radius: var(--radius);
}

.live-caption-overlay {
  margin-top: 1rem;
  min-height: 6rem;
  background: rgba(0, 0, 0, 0.6);
  color: #fff;
  font-size: 1.2rem;
  border-radius: var(--radius);
  padding: 1rem;
}

.history-entry {
  border-bottom: 1px solid var(--color-border);
  padding: 0.75rem 0;
}

.history-entry small {
  color: var(--color-text-muted);
}

.hint {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

.fatal-error-banner {
  background: var(--color-error);
  color: #fff;
  padding: 0.75rem 1.5rem;
  text-align: center;
}

.login-screen {
  display: none;
  min-height: 100vh;
  align-items: center;
  justify-content: center;
}

.login-screen.is-active {
  display: flex;
}

.login-form {
  width: 100%;
  max-width: 360px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 1.5rem;
}

.login-form h1 {
  margin-top: 0;
  font-size: 1.25rem;
}

.app-shell {
  display: none;
}

.app-shell.is-active {
  display: block;
}

#logout-button {
  margin-left: auto;
}