:root {
  --ink: #1c1410;
  --paper: #f4efe6;
  --wood: #c4a06a;
  --line: #5a3a18;
  --muted: #6b5c4e;
  --accent: #8b2e1f;
  --ok: #2f6b3a;
}

* { box-sizing: border-box; }
html, body { margin: 0; background: var(--paper); color: var(--ink); font-family: "Iwanami", "Source Han Serif SC", "Songti SC", "Noto Serif SC", serif; }
.top { display: flex; justify-content: space-between; gap: 1rem; align-items: flex-end; flex-wrap: wrap; padding: 1.25rem 1.5rem 0.75rem; border-bottom: 1px solid #e0d5c6; }
.auth { display: flex; flex-wrap: wrap; gap: 0.35rem; align-items: center; }
.auth input { font: inherit; padding: 0.3rem 0.45rem; border: 1px solid #c9b8a2; width: 10rem; }
.auth button { background: var(--ink); color: var(--paper); border: none; padding: 0.35rem 0.7rem; }
.auth button.ghost { background: #fff; color: var(--ink); border: 1px solid #c9b8a2; }
h1 { margin: 0; font-size: 1.4rem; letter-spacing: 0.08em; }
.sub { margin: 0.35rem 0 0; color: var(--muted); font-size: 0.9rem; }
nav { display: flex; gap: 0.4rem; align-items: center; }
.tab, button { font: inherit; cursor: pointer; }
.home { color: var(--muted); text-decoration: none; border: 1px solid #c9b8a2; padding: 0.35rem 0.8rem; }
.tab { background: transparent; border: 1px solid #c9b8a2; padding: 0.35rem 0.8rem; color: var(--muted); }
.tab.on { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.panel { display: none; padding: 1rem 1.5rem 2rem; }
.panel.on { display: block; }
.toolbar { display: flex; flex-wrap: wrap; gap: 0.5rem; align-items: center; margin-bottom: 0.8rem; }
.primary { background: var(--accent); color: #fff; border: none; padding: 0.4rem 0.9rem; }
#btn-pass { background: #fff; border: 1px solid #c9b8a2; padding: 0.4rem 0.9rem; }
.status { color: var(--muted); font-size: 0.92rem; }
canvas { display: block; background: var(--wood); box-shadow: 0 10px 28px rgba(60, 40, 20, 0.18); max-width: 100%; height: auto; }
.lines { margin: 0 0 0.8rem; padding-left: 1.2rem; color: var(--muted); }
.lines .on { color: var(--accent); font-weight: 700; }
.lines .ok { color: var(--ok); }
.play-layout { display: flex; flex-wrap: wrap; gap: 1.2rem; align-items: flex-start; }
.guide-title { margin: 0 0 0.4rem; font-weight: 700; }
.guide-why { margin: 0 0 0.6rem; color: var(--muted); font-size: 0.92rem; }
.guide-verdict { margin: 0; font-weight: 700; }
.guide-verdict.hit { color: var(--ok); }
.guide-verdict.miss { color: var(--accent); }
.review-pane { flex: 1 1 18rem; min-width: 16rem; max-width: 28rem; }
.review-list { margin: 0 0 0.8rem; padding-left: 1.2rem; }
.review-list button {
  font: inherit;
  background: #fff;
  border: 1px solid #c9b8a2;
  padding: 0.25rem 0.55rem;
  margin-left: 0.4rem;
}
.chat-log {
  max-height: 16rem;
  overflow: auto;
  border: 1px solid #e0d5c6;
  background: #fffdf8;
  padding: 0.6rem 0.75rem;
  font-size: 0.92rem;
}
.chat-log .msg { margin: 0 0 0.55rem; }
.chat-log .msg.user { color: var(--muted); }
.chat-log .msg.assistant { color: var(--ink); }
.chat-form { display: flex; gap: 0.35rem; margin-top: 0.45rem; }
.chat-form input { flex: 1; font: inherit; padding: 0.35rem 0.5rem; border: 1px solid #c9b8a2; }
.chat-form button { font: inherit; background: var(--ink); color: var(--paper); border: none; padding: 0.35rem 0.7rem; }