/* styles.css */
:root {
  --bg: #0b1220;
  --card: #121b2f;
  --muted: #9fb0d0;
  --text: #e8eefc;
  --accent: #7aa2ff;
  --danger: #ff6b6b;
  --border: rgba(255,255,255,0.10);
}

* { box-sizing: border-box; }
html, body { height: 100%; margin: 0; font-family: system-ui, -apple-system, Segoe UI, Roboto, "Noto Sans JP", sans-serif; background: var(--bg); color: var(--text); }

.container { max-width: 980px; margin: 0 auto; padding: 18px; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: 16px; padding: 16px; box-shadow: 0 10px 30px rgba(0,0,0,0.25); }

.topbar { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-bottom: 14px; }
.brand { font-weight: 700; letter-spacing: 0.2px; }
.muted { color: var(--muted); font-size: 13px; }

.btn { appearance: none; border: 1px solid var(--border); background: rgba(255,255,255,0.06); color: var(--text); padding: 10px 14px; border-radius: 12px; cursor: pointer; font-weight: 600; }
.btn:hover { border-color: rgba(255,255,255,0.2); }
.btn.primary { background: rgba(122,162,255,0.18); border-color: rgba(122,162,255,0.35); }
.btn.danger { background: rgba(255,107,107,0.12); border-color: rgba(255,107,107,0.35); }

.row { display: flex; gap: 10px; flex-wrap: wrap; }
.spacer { flex: 1; }

.input { width: 100%; padding: 12px 12px; border-radius: 12px; border: 1px solid var(--border); background: rgba(255,255,255,0.04); color: var(--text); outline: none; }
textarea.input { min-height: 64px; resize: vertical; }

.chat {
  display: flex; flex-direction: column; gap: 10px;
  height: calc(100vh - 360px);
  min-height: 320px;
  overflow: auto;
  padding: 10px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: rgba(0,0,0,0.18);
}

.msg { max-width: 85%; padding: 10px 12px; border-radius: 14px; border: 1px solid var(--border); white-space: pre-wrap; }
.msg.user { align-self: flex-end; background: rgba(122,162,255,0.14); border-color: rgba(122,162,255,0.25); }
.msg.assistant { align-self: flex-start; background: rgba(255,255,255,0.06); }

.footer { margin-top: 12px; display: flex; gap: 10px; align-items: flex-end; }
.small { font-size: 12px; color: var(--muted); }

.alert { margin-top: 10px; padding: 10px 12px; border-radius: 12px; border: 1px solid rgba(255,107,107,0.35); background: rgba(255,107,107,0.12); color: var(--text); }
pre.code { background: rgba(0,0,0,0.25); border: 1px solid var(--border); border-radius: 12px; padding: 10px; overflow: auto; }
details { margin-top: 10px; }
label { display:block; margin-bottom: 6px; }