@import url('./design-tokens.css');

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--uacb-bg);
  color: var(--uacb-text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
button, input, textarea, select { font: inherit; }
button { -webkit-appearance: none; appearance: none; }
a { color: var(--uacb-teal-700); text-underline-offset: 3px; }
img, svg { max-width: 100%; }

.uacb-shell { width: min(calc(100% - 32px), var(--uacb-max-width)); margin-inline: auto; }
.uacb-nav {
  background: rgba(255,255,255,.98);
  border-bottom: 1px solid var(--uacb-border);
  position: sticky;
  top: 0;
  z-index: 40;
}
.uacb-nav-inner {
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.uacb-nav-links { display: flex; gap: 8px; flex-wrap: wrap; }
.uacb-nav-link {
  color: var(--uacb-navy-800);
  text-decoration: none;
  font-weight: 650;
  padding: 9px 12px;
  border-radius: var(--uacb-radius-sm);
}
.uacb-nav-link:hover, .uacb-nav-link[aria-current="page"] { background: var(--uacb-teal-100); color: var(--uacb-navy-950); }

.uacb-hero { padding: clamp(36px, 7vw, 84px) 0 28px; }
.uacb-kicker { color: var(--uacb-teal-700); font-weight: 750; letter-spacing: .02em; }
.uacb-title { color: var(--uacb-navy-950); font-size: clamp(2rem, 5vw, 4rem); line-height: 1.05; letter-spacing: -.035em; margin: 10px 0 16px; }
.uacb-lede { max-width: 760px; color: var(--uacb-text-muted); font-size: clamp(1rem, 2vw, 1.2rem); }

.uacb-card {
  background: var(--uacb-surface);
  border: 1px solid var(--uacb-border);
  border-radius: var(--uacb-radius-lg);
  box-shadow: var(--uacb-shadow-sm);
}
.uacb-card:hover { border-color: var(--uacb-border-strong); }

.uacb-ask-card { padding: clamp(18px, 3vw, 30px); box-shadow: var(--uacb-shadow-md); }
.uacb-ask-composer {
  display: flex;
  gap: 10px;
  align-items: flex-end;
  background: #fff;
  border: 1px solid var(--uacb-border-strong);
  border-radius: 14px;
  padding: 8px;
}
.uacb-ask-composer:focus-within { border-color: var(--uacb-focus); box-shadow: 0 0 0 3px rgba(15,102,116,.16); }
.uacb-ask-input {
  flex: 1;
  min-height: 48px;
  max-height: 180px;
  resize: vertical;
  border: 0;
  outline: 0;
  padding: 11px 12px;
  color: var(--uacb-text);
  background: transparent;
}
.uacb-primary-button {
  border: 1px solid var(--uacb-navy-950);
  background: var(--uacb-navy-950);
  color: #fff;
  font-weight: 750;
  border-radius: 10px;
  padding: 12px 17px;
  min-height: 44px;
  cursor: pointer;
}
.uacb-primary-button:hover { background: var(--uacb-navy-800); }
.uacb-primary-button:focus-visible, .uacb-chip:focus-visible, .uacb-nav-link:focus-visible { outline: 3px solid rgba(15,102,116,.28); outline-offset: 2px; }

.uacb-chip-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.uacb-chip {
  border: 1px solid var(--uacb-border);
  background: var(--uacb-surface);
  color: var(--uacb-navy-800);
  border-radius: 999px;
  padding: 8px 12px;
  cursor: pointer;
  font-weight: 600;
  text-align: left;
}
.uacb-chip:hover { border-color: var(--uacb-teal-600); background: var(--uacb-teal-100); }

.uacb-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 16px; }
.uacb-feature-card { padding: 22px; min-height: 180px; }
.uacb-feature-card h3 { color: var(--uacb-navy-950); margin-top: 0; }

.uacb-trust-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  color: var(--uacb-text-muted);
  font-size: .92rem;
  border-block: 1px solid var(--uacb-border);
  padding: 14px 0;
}
.uacb-info-callout { border-left: 4px solid var(--uacb-teal-600); background: var(--uacb-blue-100); padding: 14px 16px; border-radius: 0 var(--uacb-radius-md) var(--uacb-radius-md) 0; }

.uacb-badge { display: inline-flex; align-items: center; border-radius: 999px; padding: 4px 9px; font-size: .78rem; font-weight: 750; border: 1px solid currentColor; }
.uacb-badge--neutral { color: var(--uacb-neutral); background: #F8FAFC; }
.uacb-badge--low { color: var(--uacb-low); background: #EFF9F3; }
.uacb-badge--moderate { color: var(--uacb-moderate); background: #FFF8E5; }
.uacb-badge--high { color: var(--uacb-high); background: #FFF1F0; }
.uacb-badge--unknown { color: var(--uacb-unknown); background: #F3F4F6; }

.uacb-message-list { display: grid; gap: 16px; margin-top: 20px; }
.uacb-message { border: 1px solid var(--uacb-border); border-radius: var(--uacb-radius-md); padding: 16px 18px; background: #fff; }
.uacb-message--user { margin-left: min(9vw, 84px); background: var(--uacb-surface-muted); }
.uacb-answer-section + .uacb-answer-section { margin-top: 18px; padding-top: 18px; border-top: 1px solid var(--uacb-border); }
.uacb-answer-section h2, .uacb-answer-section h3 { color: var(--uacb-navy-950); margin: 0 0 8px; }

@media (max-width: 820px) {
  .uacb-shell { width: min(calc(100% - 24px), var(--uacb-max-width)); }
  .uacb-grid { grid-template-columns: 1fr; }
  .uacb-nav-inner { min-height: 58px; align-items: flex-start; padding-block: 10px; }
  .uacb-nav-links { justify-content: flex-end; }
  .uacb-ask-composer { align-items: stretch; flex-direction: column; }
  .uacb-primary-button { width: 100%; }
  .uacb-message--user { margin-left: 24px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; transition-duration: .01ms !important; }
}