:root {
  --bg: #ffffff; --panel: #f7f7f8; --border: #e3e3e6;
  --text: #1f2023; --muted: #6b6e76; --accent: #1f6feb;
  --good: #1a7f37; --warn: #b35900;
  --code-bg: #1e1e23; --code-fg: #f3f3f3; --ai-bubble: #f3f5f9;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0e1116; --panel: #161b22; --border: #2a313b;
    --text: #e6edf3; --muted: #9aa4b2; --accent: #1f6feb;
    --good: #3fb950; --warn: #d29922;
    --code-bg: #14151a; --code-fg: #f3f3f3; --ai-bubble: #161b22;
  }
}

* { box-sizing: border-box; }
html { scrollbar-gutter: stable; }
body {
  margin: 0; color: var(--text); background: var(--bg);
  font-family: system-ui, "Segoe UI", "Hiragino Sans", "Noto Sans JP", sans-serif;
  font-size: 15px; line-height: 1.65;
}

.ab-main { max-width: 60rem; margin: 0 auto; padding: 1.5rem 1rem 4rem; }

.ab-hero h1 { font-size: 1.5rem; margin: 0.2rem 0 0.4rem; }
.ab-hero p { color: var(--muted); margin: 0 0 1.2rem; }
.ab-hero a { color: var(--accent); }

/* ---- form ---- */
.ab-form {
  background: var(--panel); border: 1px solid var(--border);
  border-radius: 12px; padding: 1rem; margin-bottom: 1.5rem;
}
.ab-field { margin-bottom: 0.9rem; }
.ab-field > label { display: block; font-weight: 600; margin-bottom: 0.35rem; }
.ab-budget-row { display: flex; flex-wrap: wrap; align-items: center; gap: 0.5rem; }
#ab-budget {
  width: 9rem; padding: 0.5rem 0.6rem; font-size: 1rem;
  border: 1px solid var(--border); border-radius: 8px;
  background: var(--bg); color: var(--text);
}
.ab-presets { display: flex; flex-wrap: wrap; gap: 0.35rem; }
.ab-presets button {
  padding: 0.4rem 0.7rem; border: 1px solid var(--border); border-radius: 999px;
  background: var(--bg); color: var(--text); cursor: pointer; font-size: 0.85rem;
}
.ab-presets button:hover, .ab-presets button.active { border-color: var(--accent); color: var(--accent); }
#ab-prompt {
  width: 100%; padding: 0.6rem; font: inherit; resize: vertical;
  border: 1px solid var(--border); border-radius: 8px;
  background: var(--bg); color: var(--text);
}
.ab-actions { display: flex; gap: 0.6rem; align-items: center; }
#ab-send {
  padding: 0.6rem 1.1rem; border: 0; border-radius: 8px;
  background: var(--accent); color: #fff; font-size: 1rem; cursor: pointer;
}
#ab-send:disabled { opacity: 0.55; cursor: default; }
.ghost {
  padding: 0.6rem 1rem; border: 1px solid var(--border); border-radius: 8px;
  background: var(--bg); color: var(--text); cursor: pointer;
}
.hidden { display: none !important; }

/* ---- mode toggle / model select ---- */
.ab-mode { display: flex; flex-wrap: wrap; align-items: center; gap: 0.4rem 1rem; }
.ab-mode-label { font-weight: 600; }
.ab-mode-opt { display: inline-flex; align-items: center; gap: 0.35rem; cursor: pointer; }
.ab-mode-opt small { color: var(--muted); }
#ab-model {
  padding: 0.45rem 0.6rem; font: inherit; border: 1px solid var(--border);
  border-radius: 8px; background: var(--bg); color: var(--text); max-width: 16rem;
}
.ab-model-note { color: var(--muted); }

/* ---- output ---- */
.ab-output { display: flex; flex-direction: column; gap: 1rem; }

/* ---- thinking / steps ---- */
.ab-status { display: flex; flex-direction: column; gap: 0.6rem; }
.ab-steps { display: flex; flex-direction: column; gap: 0.3rem; }
.ab-step { color: var(--muted); font-size: 0.9rem; padding-left: 0.2rem; }

/* ---- verdict banner ---- */
.ab-verdict {
  border-radius: 12px; padding: 0.8rem 1rem; font-weight: 600; line-height: 1.6;
  border: 1px solid var(--border);
}
.ab-verdict.ok   { border-color: var(--good); color: var(--good); background: rgba(63,185,80,0.08); }
.ab-verdict.warn { border-color: var(--warn); color: var(--warn); background: rgba(210,153,34,0.10); }
.ab-bubble {
  background: var(--ai-bubble); border: 1px solid var(--border);
  border-radius: 12px; padding: 0.4rem 1rem;
}
.ab-bubble .ab-role { font-size: 0.8rem; color: var(--muted); margin: 0.4rem 0; }
.ab-bubble pre { background: var(--code-bg); color: var(--code-fg); padding: 0.8rem; border-radius: 8px; overflow-x: auto; }
.ab-bubble code { background: rgba(127,127,127,0.18); padding: 0.1em 0.35em; border-radius: 4px; }
.ab-bubble pre code { background: none; padding: 0; }
.ab-bubble table { border-collapse: collapse; }
.ab-bubble th, .ab-bubble td { border: 1px solid var(--border); padding: 0.3rem 0.5rem; }

.ab-typing { color: var(--muted); font-style: italic; }

/* ---- result card ---- */
.ab-card {
  border: 1px solid var(--border); border-radius: 12px; overflow: hidden;
  background: var(--bg);
}
.ab-card-head {
  display: flex; flex-wrap: wrap; align-items: baseline; gap: 0.6rem;
  padding: 0.9rem 1rem; background: var(--panel); border-bottom: 1px solid var(--border);
}
.ab-card-head h2 { font-size: 1.1rem; margin: 0; }
.ab-total { font-size: 1.25rem; font-weight: 700; }
.ab-total.over { color: var(--warn); }
.ab-budget-note { font-size: 0.82rem; color: var(--muted); }
.ab-badges { display: flex; gap: 0.4rem; margin-left: auto; }
.ab-badge {
  font-size: 0.75rem; padding: 0.2rem 0.55rem; border-radius: 999px;
  border: 1px solid var(--border); color: var(--muted);
}
.ab-badge.good { color: var(--good); border-color: var(--good); }
.ab-badge.warn { color: var(--warn); border-color: var(--warn); }
.ab-badge.tier { color: var(--accent); border-color: var(--accent); }

/* プラン種別ごとの左帯 */
.ab-card.kind-goal { border-left: 4px solid var(--warn); }
.ab-card.kind-feasible { border-left: 4px solid var(--good); }
.ab-card.kind-within_budget { border-left: 4px solid var(--accent); }
.ab-card-reason { padding: 0.6rem 1rem 0; color: var(--text); font-size: 0.94rem; }
.ab-card-reason p { margin: 0.3rem 0; }

.ab-rows { width: 100%; border-collapse: collapse; }
.ab-rows td { padding: 0.55rem 1rem; border-bottom: 1px solid var(--border); vertical-align: top; }
.ab-rows tr:last-child td { border-bottom: 0; }
.ab-rows .c-icon { width: 1.6rem; }
.ab-rows .c-label { color: var(--muted); white-space: nowrap; font-size: 0.85rem; }
.ab-rows .c-name a { color: var(--text); text-decoration: none; }
.ab-rows .c-name a:hover { color: var(--accent); text-decoration: underline; }
.ab-rows .c-price { text-align: right; white-space: nowrap; font-variant-numeric: tabular-nums; }

/* ---- 詳細スペックのアコーディオン ---- */
.ab-rows .c-toggle { width: 2rem; text-align: center; }
.ab-toggle {
  border: 1px solid var(--border); background: var(--panel); color: var(--muted);
  border-radius: 6px; width: 1.6rem; height: 1.6rem; cursor: pointer;
  font-size: 0.75rem; line-height: 1; transition: transform 0.15s;
}
.ab-toggle:hover { color: var(--accent); border-color: var(--accent); }
.ab-toggle.open { transform: rotate(90deg); color: var(--accent); border-color: var(--accent); }
.ab-detail-row td { background: var(--panel); padding: 0.7rem 1rem 0.9rem; }
.ab-detail-grid {
  display: grid; grid-template-columns: max-content 1fr; gap: 0.25rem 1rem;
  font-size: 0.86rem;
}
.ab-detail-k { color: var(--muted); white-space: nowrap; }
.ab-detail-v { overflow-wrap: anywhere; }
.ab-detail-empty { margin: 0; color: var(--muted); font-size: 0.86rem; font-style: italic; }

/* ---- レビュー評価 (信頼度シグナル) ---- */
.ab-review { display: inline-block; margin-left: 0.5rem; color: var(--muted); font-size: 0.78rem; white-space: nowrap; }
.ab-review-sum { margin: 0 0 0.4rem; padding: 0.3rem 0.5rem; background: var(--chip, rgba(127,127,127,0.1));
  border-radius: 6px; font-size: 0.84rem; line-height: 1.4; }

/* ---- 組立チェック一覧 ---- */
.ab-checks { padding: 0.7rem 1rem 0; border-top: 1px solid var(--border); }
.ab-checks-title { font-weight: 600; font-size: 0.85rem; color: var(--muted); margin-bottom: 0.3rem; }
.ab-checks ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 0.2rem; }
.ab-check { display: flex; gap: 0.45rem; align-items: baseline; font-size: 0.86rem; }
.ab-check-ico { width: 1.1rem; text-align: center; flex: none; }
.ab-check-label { font-weight: 600; white-space: nowrap; }
.ab-check-note { color: var(--muted); }
.ab-check.ok .ab-check-ico, .ab-check.ok .ab-check-label { color: var(--good); }
.ab-check.fixed .ab-check-ico, .ab-check.fixed .ab-check-label { color: var(--accent); }
.ab-check.warn .ab-check-ico, .ab-check.warn .ab-check-label { color: var(--warn); }
.ab-check.unknown .ab-check-ico, .ab-check.unknown .ab-check-label { color: var(--muted); }
.ab-badge.power { color: var(--text); }

.ab-card-foot { display: flex; flex-wrap: wrap; gap: 0.6rem; padding: 0.9rem 1rem; }
.ab-card-foot a.ab-open {
  padding: 0.6rem 1.1rem; border-radius: 8px; background: var(--accent);
  color: #fff; text-decoration: none; font-weight: 600;
}
#ab-copy { }
.ab-copied { color: var(--good); font-size: 0.85rem; align-self: center; }

.ab-error {
  border: 1px solid var(--warn); color: var(--warn);
  border-radius: 10px; padding: 0.8rem 1rem;
}

/* ---- ブラッシュアップ会話 ---- */
.ab-chat {
  display: flex; gap: 0.6rem; align-items: flex-end;
  margin-top: 1rem; position: sticky; bottom: 0.5rem;
  background: var(--panel); border: 1px solid var(--border);
  border-radius: 12px; padding: 0.7rem;
}
#ab-chat-input {
  flex: 1; padding: 0.55rem 0.6rem; font: inherit; resize: vertical;
  border: 1px solid var(--border); border-radius: 8px;
  background: var(--bg); color: var(--text);
}
#ab-chat-send {
  padding: 0.6rem 1.1rem; border: 0; border-radius: 8px;
  background: var(--accent); color: #fff; font-size: 0.95rem; cursor: pointer;
}
#ab-chat-send:disabled { opacity: 0.55; cursor: default; }

.ab-bubble.ab-user {
  background: var(--bg); border-color: var(--accent);
  margin-left: 2.5rem;
}
.ab-bubble.ab-user .ab-body { white-space: pre-wrap; padding-bottom: 0.5rem; }

/* ベース構成 (会話の調整対象) の強調 + 調整版カード */
.ab-card.ab-base { box-shadow: 0 0 0 2px var(--accent); }
.ab-card.kind-revised { border-left: 4px solid #8957e5; }
.ab-badge.changed { color: #8957e5; border-color: #8957e5; }
.ab-rebase { font-size: 0.85rem; }

@media (max-width: 520px) {
  .ab-rows .c-label { display: none; }
  .ab-badges { width: 100%; margin-left: 0; }
  .ab-detail-grid { grid-template-columns: 1fr; gap: 0.05rem; }
  .ab-detail-k { margin-top: 0.35rem; }
}