/* SCHEMA. 共有スタイル（menu.html / chat.html） */
:root {
  --bg: #0d1013;
  --panel: #161b1f;
  --border: #242c31;
  --fg: #e6e6e6;
  --accent: #10a37f;
  --muted: #8a90a0;
}

* { box-sizing: border-box; }

html, body { height: 100%; margin: 0; }

body {
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--fg);
  font: 14px/1.6 -apple-system, "Hiragino Kaku Gothic ProN", sans-serif;
}

a { color: inherit; text-decoration: none; }

.app-shell {
  display: flex;
  flex-direction: column;
  height: 100%;
  width: 100%;
}

/* ---- ヘッダー共通 ---- */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
}

.brand { margin: 0; font-size: 16px; font-weight: 700; letter-spacing: .02em; }

.user-area { display: flex; align-items: center; gap: 14px; }

.user-chip { display: flex; align-items: center; gap: 8px; font-size: 12px; color: var(--muted); }

.avatar {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--panel);
  border: 1px solid var(--border);
  font-size: 11px;
  color: var(--fg);
}

.logout-link {
  font-size: 12px;
  color: var(--muted);
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: 6px;
}

.logout-link:hover { color: var(--fg); border-color: var(--accent); }

/* ---- menu.html ---- */
.menu-main {
  flex: 1;
  width: 100%;
  max-width: 900px;
  margin: 0 auto;
  padding: 32px 20px 40px;
}

.menu-lead { margin: 0 0 20px; color: var(--muted); font-size: 13px; }

.menu-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 14px;
}

.menu-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 10px;
  transition: border-color .15s ease, transform .15s ease;
}

.menu-card:hover { border-color: var(--accent); transform: translateY(-2px); }

.menu-card-title { font-size: 14px; font-weight: 700; }
.menu-card-title::after { content: " \2192"; color: var(--accent); }

.menu-card-desc { font-size: 12px; color: var(--muted); }

/* ---- chat.html ---- */
.chat-heading { display: flex; align-items: baseline; gap: 12px; }

.back-link { font-size: 12px; color: var(--muted); }
.back-link:hover { color: var(--accent); }

.status-area { display: flex; align-items: center; gap: 12px; font-size: 11px; color: var(--muted); }

.chat-main { flex: 1; overflow: auto; }

.msgs {
  max-width: 820px;
  width: 100%;
  margin: 0 auto;
  padding: 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.msg { padding: 9px 13px; border-radius: 10px; white-space: pre-wrap; word-break: break-word; }
.msg.user { background: var(--accent); align-self: flex-end; max-width: 85%; }
.msg.ai { background: var(--panel); border: 1px solid var(--border); align-self: flex-start; max-width: 92%; }
.msg.error { background: #4a1d1d; align-self: flex-start; max-width: 92%; }

.input-row {
  display: flex;
  align-items: flex-end;
  gap: 10px;
  padding: 14px 20px;
  border-top: 1px solid var(--border);
  max-width: 820px;
  width: 100%;
  margin: 0 auto;
}

textarea {
  flex: 1;
  min-height: 44px;
  max-height: 160px;
  background: var(--panel);
  color: var(--fg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  resize: vertical;
  font: inherit;
}

textarea:focus { outline: none; border-color: var(--accent); }

.send-area { display: flex; align-items: center; gap: 10px; }

button {
  background: var(--accent);
  color: #fff;
  border: 0;
  border-radius: 8px;
  padding: 0 18px;
  height: 40px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
}

button:disabled { opacity: .4; cursor: default; }

.spinner {
  width: 16px;
  height: 16px;
  border: 2px solid var(--border);
  border-top-color: var(--accent);
  border-radius: 50%;
  display: inline-block;
  animation: spin .8s linear infinite;
}

.spinner[hidden] { display: none; }

@keyframes spin { to { transform: rotate(360deg); } }

@media (max-width: 560px) {
  .topbar { padding: 12px 14px; }
  .menu-main { padding: 24px 14px 32px; }
  .msgs { padding: 14px; }
  .input-row { padding: 12px 14px; flex-wrap: wrap; }
}