* { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

body {
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 18px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  padding-top: env(safe-area-inset-top);
  padding-bottom: env(safe-area-inset-bottom);
}

/* Header */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem 1.1rem;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
}
.brand { display: flex; align-items: center; gap: 0.6rem; }
.brand h1 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  margin: 0;
}
.sigil {
  width: 28px; height: 28px;
  background: var(--sigil) center / contain no-repeat;
  filter: drop-shadow(0 0 2px rgba(0,0,0,0.4));
}

/* Theme switch */
.theme-switch { display: flex; gap: 0.35rem; flex-wrap: wrap; }
.theme-switch button {
  font-family: var(--font-display);
  font-size: 0.72rem;
  letter-spacing: 0.03em;
  color: var(--muted);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.3rem 0.6rem;
  cursor: pointer;
  transition: color .15s, border-color .15s, background .15s;
}
.theme-switch button[aria-pressed="true"] {
  color: var(--accent);
  border-color: var(--accent);
}
.theme-switch button:hover { color: var(--text); }

/* Main */
.app-main {
  flex: 1;
  width: 100%;
  max-width: 720px;
  margin: 0 auto;
  padding: 1.4rem 1.1rem;
}

.ask { display: flex; flex-direction: column; gap: 1.1rem; }
.field { display: flex; flex-direction: column; gap: 0.4rem; }
.field-label {
  font-family: var(--font-display);
  font-size: 0.8rem;
  letter-spacing: 0.05em;
  color: var(--muted);
  text-transform: uppercase;
}
#question {
  font-family: var(--font-body);
  font-size: 1.05rem;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.75rem 0.85rem;
}
#question:focus { outline: 2px solid var(--accent); outline-offset: 1px; }

.sources {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.7rem 0.85rem;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 0.4rem 0.9rem;
}
.sources legend {
  font-family: var(--font-display);
  font-size: 0.8rem;
  letter-spacing: 0.05em;
  color: var(--muted);
  text-transform: uppercase;
  padding: 0 0.3rem;
}
.sources label { display: flex; align-items: center; gap: 0.45rem; font-size: 0.95rem; }
.sources input { accent-color: var(--accent); }

.ask-btn {
  align-self: flex-start;
  font-family: var(--font-display);
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  color: var(--bg);
  background: var(--accent);
  border: none;
  border-radius: var(--radius);
  padding: 0.7rem 1.6rem;
  cursor: pointer;
  transition: filter .15s;
}
.ask-btn:hover { filter: brightness(1.08); }
.ask-btn:disabled { opacity: 0.55; cursor: default; }

/* Answer card */
.answer {
  margin-top: 1.6rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
  padding: 1.1rem 1.15rem;
}
.answer-body { font-size: 1.05rem; }
.citations { list-style: none; margin: 0.9rem 0 0; padding: 0.9rem 0 0; border-top: 1px solid var(--border); display: flex; flex-direction: column; gap: 0.45rem; }
.citations li { font-size: 0.85rem; color: var(--muted); }
.citations a { color: var(--accent-2); text-decoration: none; }
.citations a:hover { text-decoration: underline; }
.answer-meta { margin: 0.8rem 0 0; font-size: 0.75rem; color: var(--muted); font-style: italic; }

/* Footer */
.app-footer {
  padding: 0.9rem 1.1rem;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 0.75rem;
  text-align: center;
}