:root { --line: #e3e3e0; --ink: #1c1c1a; --muted: #6b6b66; --accent: #2f6f4f; }
* { box-sizing: border-box; }
body { margin: 0; font: 16px/1.5 -apple-system, "Segoe UI", Roboto, sans-serif; color: var(--ink); background: #faf9f7; }
.login-box { max-width: 320px; margin: 15vh auto; padding: 24px; background: #fff; border: 1px solid var(--line); border-radius: 12px; }
.login-box h1 { margin: 0 0 16px; font-size: 22px; }
.login-box .face { display: block; width: 96px; height: 96px; margin: 0 auto 12px; border-radius: 50%; }
.login-box input, .login-box button { width: 100%; padding: 10px 12px; margin-bottom: 10px; border: 1px solid var(--line); border-radius: 8px; font: inherit; }
.login-box button { background: var(--accent); color: #fff; border: none; cursor: pointer; }
.err { color: #a12; margin: 4px 0 0; }

.top { display: flex; align-items: center; gap: 10px; padding: 10px 16px; background: #fff; border-bottom: 1px solid var(--line); }
.brand-face { width: 26px; height: 26px; border-radius: 50%; }
.brand { font-weight: 600; }
.spacer { flex: 1; }
.link { background: none; border: none; color: var(--accent); cursor: pointer; font: inherit; }
.fresh { padding: 6px 16px; font-size: 14px; color: var(--muted); background: #fff; border-bottom: 1px solid var(--line); }
.fresh.warn { background: #fff6d8; color: #6a5200; }
.layout { display: flex; height: calc(100vh - 84px); }
.chats { width: 240px; border-right: 1px solid var(--line); padding: 12px; overflow-y: auto; }
.chats .new { width: 100%; padding: 8px; margin-bottom: 12px; border: 1px solid var(--line); border-radius: 8px; background: #fff; cursor: pointer; font: inherit; }
.chats ul { list-style: none; margin: 0; padding: 0; }
.chats li { display: flex; align-items: center; gap: 6px; padding: 8px; border-radius: 8px; cursor: pointer; }
.chats li:hover { background: #f1f0ed; }
.chats li.active { background: #e7efe9; }
.chats .title { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 14px; }
.chats .when { font-size: 11px; color: var(--muted); }
.chats .del { border: none; background: none; color: var(--muted); cursor: pointer; font-size: 16px; }
.talk { flex: 1; display: flex; flex-direction: column; }
#thread { flex: 1; overflow-y: auto; padding: 16px; }
.msg { max-width: 760px; margin: 0 auto 20px; }
.msg .author { display: flex; align-items: center; gap: 6px; font-size: 12px; color: var(--muted); margin-bottom: 4px; }
.msg .face { width: 22px; height: 22px; border-radius: 50%; }
.msg .text { white-space: pre-wrap; }
.msg.user .text { background: #fff; border: 1px solid var(--line); border-radius: 10px; padding: 8px 12px; }
.table-box { margin-top: 12px; overflow-x: auto; background: #fff; border: 1px solid var(--line); border-radius: 10px; padding: 10px; }
.table-title { font-size: 13px; color: var(--muted); margin-bottom: 6px; }
.table-box table { border-collapse: collapse; font-size: 14px; width: 100%; }
.table-box th, .table-box td { border-bottom: 1px solid var(--line); padding: 5px 8px; text-align: left; white-space: nowrap; }
.note { font-size: 13px; color: #6a5200; margin: 6px 0 0; }
.muted { color: var(--muted); }
.composer { border-top: 1px solid var(--line); padding: 12px 16px; background: #fff; }
.composer .row { display: flex; gap: 8px; max-width: 760px; margin: 0 auto; }
.composer textarea { flex: 1; resize: none; padding: 8px 10px; border: 1px solid var(--line); border-radius: 8px; font: inherit; }
.composer select, .composer button { border: 1px solid var(--line); border-radius: 8px; background: #fff; font: inherit; padding: 8px 12px; cursor: pointer; }
.composer #send { background: var(--accent); color: #fff; border: none; min-width: 48px; }
.presets { display: flex; flex-wrap: wrap; gap: 6px; max-width: 760px; margin: 8px auto 0; }
.preset { border: 1px solid var(--line); background: #fff; border-radius: 999px; padding: 4px 10px; font-size: 13px; cursor: pointer; }
.trail .step { margin: 8px 0; padding-left: 10px; border-left: 2px solid #e2e2e2; }
.step-text { color: #666; font-size: 14px; margin-bottom: 4px; }
.sql-box summary { cursor: pointer; color: #666; font-size: 13px; }
.sql-box pre.sql { white-space: pre-wrap; font-size: 13px; background: #f6f6f6; padding: 8px; border-radius: 6px; }