:root {
  --brand-green: #438843;
  --brand-green-dark: #336b33;
  --brand-green-light: #e8f2e8;
  --brand-gray: #888887;
  --bg: #ffffff;
  --surface: #ffffff;
  --surface-2: #f4f7f4;
  --text: #2a2e2a;
  --text-dim: #6b706b;
  --accent: var(--brand-green);
  --accent-hover: var(--brand-green-dark);
  --warning-bg: #fff8ec;
  --warning-border: #e0a83e;
  --warning-text: #8a5a12;
  --error: #c0392b;
  --border: #e1e6e1;
  --radius: 14px;
  --shadow: 0 2px 10px rgba(67, 136, 67, 0.08), 0 1px 2px rgba(0, 0, 0, 0.04);
  --font-display: "Space Grotesk", -apple-system, BlinkMacSystemFont, sans-serif;
}

* {
  box-sizing: border-box;
}

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

.screen {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.hidden {
  display: none !important;
}

h1 {
  margin: 0;
  font-size: 1.8rem;
  font-weight: 700;
  font-family: var(--font-display);
  letter-spacing: -0.01em;
  color: var(--text);
}

.subtitle {
  margin: 6px 0 20px;
  color: var(--text-dim);
  font-size: 0.95rem;
}

.logo {
  height: 34px;
  width: auto;
  display: block;
  margin: 0 auto 18px;
}

.logo-small {
  height: 24px;
  margin: 0 auto 10px;
  display: block;
}

.ia-local-brand {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-bottom: 4px;
}

.ia-icon {
  flex-shrink: 0;
}

.ia-accent {
  color: var(--brand-green);
}

/* Login */

.card {
  width: 100%;
  max-width: 380px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 36px 28px;
  text-align: center;
}

.card .subtitle {
  margin-bottom: 24px;
}

#login-form {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

input,
textarea {
  width: 100%;
  padding: 12px 14px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--surface-2);
  color: var(--text);
  font-size: 1rem;
  font-family: inherit;
}

input:focus,
textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--brand-green-light);
}

button {
  cursor: pointer;
  border: none;
  border-radius: 8px;
  background: var(--accent);
  color: white;
  padding: 12px 16px;
  font-size: 1rem;
  font-weight: 600;
  transition: background 0.15s ease, transform 0.1s ease;
}

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

button:active {
  transform: translateY(1px);
}

button:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
}

.error {
  color: var(--error);
  margin-top: 14px;
  font-size: 0.9rem;
}

.link-btn {
  background: transparent;
  color: var(--text-dim);
  font-weight: 400;
  font-size: 0.85rem;
  padding: 8px 12px;
  flex-shrink: 0;
}

.link-btn:hover {
  background: var(--surface-2);
  color: var(--text);
}

/* Chat */

.chat-screen {
  justify-content: flex-start;
  max-width: 760px;
  width: 100%;
  margin: 0 auto;
  padding: 32px 20px 48px;
}

.chat-header {
  position: relative;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 2px;
  margin-bottom: 20px;
  padding-top: 8px;
}

.chat-header .subtitle {
  max-width: 480px;
}

.header-logout {
  position: absolute;
  top: 0;
  right: 0;
}

.info-toggles {
  width: 100%;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-bottom: 16px;
}

.how-it-works-btn {
  background: transparent;
  color: var(--brand-green-dark);
  border: 1px solid var(--border);
  font-weight: 500;
  font-size: 0.85rem;
  padding: 7px 14px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.how-it-works-btn:hover {
  background: var(--brand-green-light);
}

.info-dot {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--brand-green);
  color: white;
  font-size: 0.7rem;
  font-style: italic;
  font-weight: 700;
}

.how-it-works {
  width: 100%;
  background: var(--brand-green-light);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  margin-bottom: 20px;
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--text);
}

.how-it-works p {
  margin: 10px 0 0;
}

.how-it-works p:first-of-type {
  margin-top: 14px;
}

.pipeline {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text);
}

.pipeline .arrow {
  color: var(--brand-gray);
  font-weight: 400;
}

.pipeline-model {
  color: var(--brand-green-dark);
}

.chat-box {
  width: 100%;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

textarea {
  resize: vertical;
  min-height: 90px;
}

.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.hint {
  color: var(--text-dim);
  font-size: 0.78rem;
}

#ask-btn {
  min-width: 140px;
}

.status {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-dim);
  font-size: 0.9rem;
}

.queue-status {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--warning-bg);
  border: 1px solid var(--warning-border);
  color: var(--warning-text);
  border-radius: 8px;
  padding: 10px 14px;
  font-size: 0.85rem;
}

.pulse-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--brand-green);
  animation: pulse 1.1s ease-in-out infinite;
  flex-shrink: 0;
}

@keyframes pulse {
  0%, 100% { transform: scale(0.7); opacity: 0.6; }
  50% { transform: scale(1); opacity: 1; }
}

#elapsed {
  font-variant-numeric: tabular-nums;
  color: var(--brand-green-dark);
  font-weight: 600;
}

.examples {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.examples-label {
  color: var(--text-dim);
  font-size: 0.85rem;
  margin-right: 2px;
}

.example-chip {
  background: var(--surface-2);
  color: var(--text-dim);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 6px 12px;
  font-size: 0.82rem;
  font-weight: 400;
}

.example-chip:hover {
  background: var(--brand-green-light);
  color: var(--brand-green-dark);
  border-color: var(--brand-green);
}

.thinking-box {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}

.thinking-box summary {
  cursor: pointer;
  padding: 10px 14px;
  font-size: 0.85rem;
  color: var(--text-dim);
  user-select: none;
}

.thinking-caption {
  margin: 0;
  padding: 0 14px 10px;
  font-size: 0.78rem;
  color: var(--text-dim);
  font-style: italic;
}

.thinking-text {
  white-space: pre-wrap;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.8rem;
  line-height: 1.5;
  color: var(--text-dim);
  padding: 0 14px 14px;
  max-height: 220px;
  overflow-y: auto;
}

.answer-wrap {
  position: relative;
}

.answer {
  white-space: pre-wrap;
  line-height: 1.6;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-left: 3px solid var(--brand-green);
  border-radius: 8px;
  padding: 16px 44px 16px 18px;
}

.answer.warning {
  background: var(--warning-bg);
  border-color: var(--warning-border);
  border-left-color: var(--warning-border);
  color: var(--warning-text);
}

.copy-btn {
  position: absolute;
  top: 10px;
  right: 10px;
  background: var(--surface);
  color: var(--text-dim);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 5px 10px;
  font-size: 0.72rem;
  font-weight: 500;
}

.copy-btn:hover {
  background: var(--brand-green-light);
  color: var(--brand-green-dark);
}

.token-stats {
  color: var(--text-dim);
  font-size: 0.78rem;
  text-align: right;
}

.chat-footer {
  width: 100%;
  margin-top: 24px;
  text-align: center;
  color: var(--text-dim);
  font-size: 0.8rem;
}

.chat-footer p {
  margin: 4px 0;
}

.powered-by {
  margin-top: 10px !important;
  padding-top: 10px;
  border-top: 1px solid var(--border);
}

.powered-by strong {
  color: var(--brand-green-dark);
}

@media (max-width: 480px) {
  .card {
    padding: 28px 20px;
  }

  .header-logout {
    position: static;
    margin-bottom: 10px;
  }

  .toolbar {
    flex-direction: column;
    align-items: stretch;
  }

  #ask-btn {
    width: 100%;
  }

  .hint {
    text-align: center;
  }
}