/* 공통 스타일 (채팅, 로그인, 관리자 화면) */
:root {
  --bg: #f6f7f9; --panel: #fff; --text: #1f2328; --muted: #6b7280;
  --line: #e5e7eb; --accent: #2563eb; --accent-text: #fff;
  --warn-bg: #fff7ed; --warn-text: #9a3412;
  --ok-bg: #ecfdf5; --ok-text: #047857;
  --danger: #dc2626;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1115; --panel: #181b21; --text: #e6e8eb; --muted: #9aa1ab;
    --line: #2a2f37; --accent: #3b82f6; --accent-text: #fff;
    --warn-bg: #2a1d12; --warn-text: #fdba74;
    --ok-bg: #0f2a20; --ok-text: #6ee7b7;
    --danger: #f87171;
  }
}
* { box-sizing: border-box; }
body {
  margin: 0; background: var(--bg); color: var(--text);
  font-family: system-ui, -apple-system, "Malgun Gothic", sans-serif;
  font-size: 15px;
}
button, input, select { font: inherit; }

/* 상단 바 */
header {
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
  padding: 12px 16px; border-bottom: 1px solid var(--line); background: var(--panel);
}
header h1 { margin: 0; font-size: 17px; flex: 1; min-width: 0; }
header .who { font-size: 13px; color: var(--muted); }
header nav { display: flex; gap: 8px; }

/* 버튼, 입력 */
.btn {
  padding: 8px 14px; border: 1px solid var(--line); border-radius: 8px;
  background: var(--panel); color: var(--text); cursor: pointer; text-decoration: none;
  font-size: 14px; white-space: nowrap;
}
.btn.primary { background: var(--accent); border-color: var(--accent); color: var(--accent-text); }
.btn:disabled { opacity: .5; cursor: default; }
input, select {
  padding: 10px 12px; border: 1px solid var(--line); border-radius: 8px;
  background: var(--bg); color: var(--text); width: 100%;
}
.error { color: var(--danger); font-size: 14px; min-height: 1.2em; }
.muted { color: var(--muted); }

/* ── 로그인 ── */
.login-wrap { min-height: 100dvh; display: grid; place-items: center; padding: 16px; }
.login-card {
  width: 100%; max-width: 360px; background: var(--panel); border: 1px solid var(--line);
  border-radius: 12px; padding: 24px; display: flex; flex-direction: column; gap: 12px;
}
.login-card h1 { margin: 0 0 4px; font-size: 20px; }
.login-card label { font-size: 13px; color: var(--muted); display: flex; flex-direction: column; gap: 4px; }

/* ── 채팅 ── */
.chat-page { display: flex; flex-direction: column; height: 100dvh; }
#log { flex: 1; overflow-y: auto; padding: 16px; display: flex; flex-direction: column; gap: 12px; }
.msg {
  max-width: min(760px, 88%); width: fit-content; padding: 10px 14px; border-radius: 12px;
  line-height: 1.55; white-space: pre-wrap; word-break: break-word;
}
.msg.me { align-self: flex-end; background: var(--accent); color: var(--accent-text); }
.msg.bot { align-self: flex-start; background: var(--panel); border: 1px solid var(--line); }
.msg.bot.none { background: var(--warn-bg); color: var(--warn-text); }
.msg .meta { margin-top: 6px; font-size: 12px; color: var(--muted); }
.chat-form {
  display: flex; gap: 8px; padding: 12px 16px; border-top: 1px solid var(--line); background: var(--panel);
}
.chat-form input { flex: 1; min-width: 0; }

/* 질문 모드 전환 (문서 / SQL) */
.mode-toggle { display: inline-flex; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; flex-shrink: 0; }
.mode-toggle button {
  border: 0; background: transparent; color: var(--muted); padding: 0 12px; cursor: pointer; white-space: nowrap;
}
.mode-toggle button.active { background: var(--accent); color: var(--accent-text); }

/* SQL 답변 */
.sql-block { margin-top: 8px; }
.sql-block pre {
  margin: 0; padding: 10px 12px; border-radius: 8px; background: var(--bg); border: 1px solid var(--line);
  font: 13px/1.5 ui-monospace, SFMono-Regular, Consolas, monospace; white-space: pre-wrap; word-break: break-all;
}
.sql-block .row { display: flex; gap: 8px; align-items: center; margin-top: 6px; }
.sql-block details { margin-top: 8px; font-size: 13px; }
.sql-block summary { cursor: pointer; color: var(--muted); }

/* ── 관리자 ── */
.admin-page main { padding: 16px; max-width: 1200px; margin: 0 auto; }
.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--line); margin-bottom: 16px; overflow-x: auto; }
.tabs button {
  padding: 10px 14px; border: 0; border-bottom: 2px solid transparent; background: none;
  color: var(--muted); cursor: pointer; white-space: nowrap;
}
.tabs button.active { color: var(--text); border-bottom-color: var(--accent); font-weight: 600; }
.toolbar { display: flex; align-items: center; gap: 8px; margin-bottom: 12px; flex-wrap: wrap; }
.toolbar .count { flex: 1; font-size: 14px; color: var(--muted); }

/* 표: 폰에서는 가로 스크롤 */
.table-wrap { overflow-x: auto; background: var(--panel); border: 1px solid var(--line); border-radius: 10px; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { padding: 10px 12px; text-align: left; vertical-align: top; border-bottom: 1px solid var(--line); }
th { background: var(--bg); font-weight: 600; white-space: nowrap; position: sticky; top: 0; }
tr:last-child td { border-bottom: 0; }
td.nowrap { white-space: nowrap; }
td.num { text-align: right; font-variant-numeric: tabular-nums; white-space: nowrap; }
td.long { min-width: 220px; max-width: 420px; }
.badge { display: inline-block; padding: 2px 8px; border-radius: 999px; font-size: 12px; white-space: nowrap; }
.badge.warn { background: var(--warn-bg); color: var(--warn-text); }
.badge.ok { background: var(--ok-bg); color: var(--ok-text); }

.user-form {
  display: grid; grid-template-columns: 1fr 1fr 140px auto; gap: 8px; align-items: end;
  background: var(--panel); border: 1px solid var(--line); border-radius: 10px; padding: 12px; margin-bottom: 8px;
}
.user-form label { font-size: 13px; color: var(--muted); display: flex; flex-direction: column; gap: 4px; }

@media (max-width: 640px) {
  .user-form { grid-template-columns: 1fr; }
  header nav .btn { padding: 6px 10px; }
}