/* ===== 將 index.html 原本結構對齊 chat-ui.css ===== */

/* main → page */
main {
  width: min(1120px, calc(100% - 28px));
  margin: 18px auto;
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.8fr);
  gap: 18px;
}

/* section → data-shell */
main > section,
.stack > section {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 18px;
  box-shadow: var(--shadow);
}

/* 右邊 stack 保持 */
.stack {
  display: grid;
  gap: 18px;
}

/* 最底 full width */
main > section[style*="grid-column"] {
  grid-column: 1 / -1;
}

/* h2 → section-header style */
main h2 {
  margin: 0 0 12px;
  font-size: 21px;
}

/* 模擬 section-header spacing */
main > section > h2 {
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

/* actions */
.actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 16px;
}

/* row */
.row {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 12px;
}

/* input */
input,
textarea {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px 11px;
}

/* button 對齊 chat-ui */
button {
  border-radius: 8px;
  background: var(--brand);
  color: #fff;
  padding: 10px 14px;
  font-weight: 700;
}

button.secondary {
  background: var(--blue);
}

button.danger {
  background: #b24b3f;
}

/* status */
.status,
pre {
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
}

/* FAQ list */
.faq-list {
  display: grid;
  gap: 13px;
}

/* step */
.step-head {
  display: grid;
  grid-template-columns: minmax(180px, 1fr) minmax(180px, 1fr) 84px;
  gap: 8px;
  margin-bottom: 6px;
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
}

.step-row {
  display: grid;
  grid-template-columns: minmax(180px, 1fr) minmax(180px, 1fr) 84px;
  gap: 8px;
  margin-bottom: 8px;
}

/* responsive */
@media (max-width: 880px) {
  main {
    grid-template-columns: 1fr;
  }

  .row {
    grid-template-columns: 1fr;
  }

  .step-row {
    grid-template-columns: 1fr;
  }

  .step-head {
    display: none;
  }
}