:root {
  --bg: #ffffff;
  --side: #f7f7f8;
  --border: #e6e6e6;
  --text: #1f1f1f;
  --muted: #8f8f92;
  --bubble: #f1f1f3;
  --dark: #171717;
  --ok: #16a34a;
  --warn: #d97706;
  --err: #dc2626;
}
* { box-sizing: border-box; margin: 0; }
html, body { height: 100%; }
body { background: var(--bg); color: var(--text); font-family: 'Inter', -apple-system, system-ui, sans-serif; font-size: 15px; }

#app { display: flex; height: 100vh; }

/* ---------------- sidebar ---------------- */
#sidebar { width: 264px; flex: none; background: var(--side); border-right: 1px solid var(--border); display: flex; flex-direction: column; padding: 14px 12px; gap: 10px; }
#sidebar.hidden { display: none; }
.side-head { display: flex; align-items: center; justify-content: space-between; padding: 2px 6px 8px; }
.wordmark { font-weight: 700; font-size: 16px; letter-spacing: -.01em; }
.icon-btn { background: none; border: 0; font-size: 16px; color: var(--muted); cursor: pointer; padding: 6px; border-radius: 8px; }
.icon-btn:hover { background: #ececee; color: var(--text); }
.icon-btn.floating { position: absolute; top: 12px; left: 12px; z-index: 20; background: var(--bg); border: 1px solid var(--border); }
.new-chat { display: block; width: 100%; text-align: left; background: var(--bg); border: 1px solid var(--border); border-radius: 10px; padding: 10px 12px; font: inherit; font-weight: 500; cursor: pointer; }
.new-chat:hover { border-color: #cfcfd4; }
.side-section { flex: 1; overflow-y: auto; margin-top: 6px; }
.side-label { font-size: 11px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; color: var(--muted); padding: 0 6px 8px; }
.side-empty { font-size: 13px; color: var(--muted); padding: 0 6px; }
.conv-item { display: flex; align-items: center; gap: 8px; width: 100%; text-align: left; background: none; border: 0; border-radius: 8px; padding: 8px 8px; font: inherit; font-size: 13px; cursor: pointer; color: var(--text); }
.conv-item:hover { background: #ececee; }
.conv-item.active { background: #ececee; }
.conv-item .t { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.conv-item small { display: block; color: var(--muted); font-size: 11px; }
@keyframes blink { 50% { opacity: .3; } }
.side-foot { border-top: 1px solid var(--border); padding-top: 10px; }
.user-info { display: flex; align-items: center; justify-content: space-between; gap: 8px; padding: 2px 8px 8px; }
.user-email { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: 12.5px; color: var(--muted); }
.user-logout { flex: none; background: none; border: 0; font: inherit; font-size: 12px; font-weight: 600; color: var(--text); cursor: pointer; padding: 4px 8px; border-radius: 8px; }
.user-logout:hover { background: #ececee; }
.side-btn { display: block; width: 100%; text-align: left; background: none; border: 0; border-radius: 8px; padding: 9px 8px; font: inherit; font-size: 13.5px; cursor: pointer; color: var(--text); }
.side-btn:hover { background: #ececee; }

/* ---------------- chat ---------------- */
#main { flex: 1; display: flex; flex-direction: column; position: relative; min-width: 0; }
#main.dragging #dropHint { display: flex; }
#dropHint { display: none; position: absolute; inset: 0; z-index: 30; background: rgba(255,255,255,.92); border: 2px dashed #bdbdc2; margin: 14px; border-radius: 16px; align-items: center; justify-content: center; font-weight: 600; color: var(--muted); pointer-events: none; }
#chatScroll { flex: 1; overflow-y: auto; }
#chatCol { max-width: 760px; margin: 0 auto; padding: 36px 20px 24px; display: flex; flex-direction: column; gap: 22px; }

/* deck flutuante */
.deck-pill { position: absolute; top: 14px; left: 14px; z-index: 15; display: flex; align-items: center; gap: 8px; background: var(--bg); border: 1px solid var(--border); border-radius: 999px; padding: 7px 14px 7px 12px; font-size: 12.5px; font-weight: 500; box-shadow: 0 2px 10px rgba(0,0,0,.06); }
.deck-pill-text { white-space: nowrap; }
.deck-pill-open { flex: none; background: none; border: 0; font: inherit; font-size: 13px; color: var(--muted); cursor: pointer; padding: 2px 4px; border-radius: 6px; }
.deck-pill-open:hover { background: var(--bubble); color: var(--text); }
.spinner { flex: none; width: 11px; height: 11px; border-radius: 99px; border: 2px solid var(--border); border-top-color: var(--text); animation: spin .7s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

.row { display: flex; gap: 12px; }
.row.bot { align-items: flex-start; }
.row .avatar { flex: none; width: 28px; height: 28px; border-radius: 8px; background: var(--dark); color: #fff; font-size: 10.5px; font-weight: 700; display: flex; align-items: center; justify-content: center; margin-top: 2px; }
.row .body { line-height: 1.7; white-space: pre-wrap; word-break: break-word; min-width: 0; }
.row.user { justify-content: flex-end; }
.row.user .body { background: var(--bubble); border-radius: 16px 16px 4px 16px; padding: 10px 16px; max-width: 78%; }
.row.sys { justify-content: center; }
.row.sys .body { font-size: 12.5px; color: var(--muted); background: none; text-align: center; }
.att { display: inline-flex; align-items: center; gap: 6px; background: #e6e6ea; border-radius: 8px; padding: 3px 9px; font-size: 12px; font-weight: 500; }
.typing { display: inline-flex; gap: 4px; padding: 8px 0; }
.typing i { width: 6px; height: 6px; border-radius: 99px; background: #c4c4c8; animation: tp 1.1s infinite; }
.typing i:nth-child(2) { animation-delay: .15s; }
.typing i:nth-child(3) { animation-delay: .3s; }
@keyframes tp { 0%,60%,100% { transform: translateY(0); opacity: .4; } 30% { transform: translateY(-4px); opacity: 1; } }

/* progresso da geração dentro do chat */
.progress-card { border: 1px solid var(--border); border-radius: 12px; padding: 14px 16px; font-family: ui-monospace, Menlo, monospace; font-size: 12px; line-height: 1.9; max-height: 240px; overflow-y: auto; background: #fafafa; }
.progress-card .stage { color: var(--ok); font-weight: 700; }
.progress-card .err { color: var(--err); }
.progress-card .detail { color: var(--muted); padding-left: 14px; }
.progress-card a { color: #2563eb; }

/* ---------------- composer ---------------- */
#composerWrap { padding: 10px 20px 18px; }
#fileChips { max-width: 760px; margin: 0 auto 8px; display: flex; flex-wrap: wrap; gap: 6px; }
#fileChips span { background: var(--bubble); border-radius: 8px; padding: 4px 10px; font-size: 12px; color: var(--muted); }
#chatForm { max-width: 760px; margin: 0 auto; display: flex; align-items: center; gap: 8px; background: var(--bg); border: 1px solid #d9d9de; border-radius: 24px; padding: 6px 8px; box-shadow: 0 2px 12px rgba(0,0,0,.04); }
#chatForm:focus-within { border-color: #b3b3ba; }
#chatInput { flex: 1; border: 0; outline: none; font: inherit; padding: 8px 6px; background: none; }
#attachBtn { flex: none; width: 36px; height: 36px; border-radius: 99px; border: 0; background: none; font-size: 18px; color: var(--muted); cursor: pointer; }
#attachBtn:hover { background: var(--bubble); color: var(--text); }
#chatSend { flex: none; width: 36px; height: 36px; border-radius: 99px; border: 0; background: var(--dark); color: #fff; font-size: 16px; cursor: pointer; }
#chatSend:disabled { opacity: .3; cursor: default; }
.foot { max-width: 760px; margin: 8px auto 0; text-align: center; font-size: 11.5px; color: var(--muted); }

/* ---------------- settings dialog ---------------- */
dialog#settings { border: 1px solid var(--border); border-radius: 16px; padding: 22px 24px 24px; width: min(560px, 92vw); font: inherit; color: var(--text); }
dialog#settings::backdrop { background: rgba(0,0,0,.28); }
.dlg-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 6px; }
.dlg-head h2 { font-size: 17px; }
dialog section { border-top: 1px solid var(--border); padding: 14px 0; }
dialog h3 { font-size: 13px; font-weight: 600; margin-bottom: 8px; }
dialog label { display: block; font-size: 12px; color: var(--muted); font-weight: 500; }
dialog input[type=text], dialog select { width: 100%; margin-top: 4px; padding: 8px 10px; border: 1px solid var(--border); border-radius: 8px; font: inherit; font-size: 13.5px; }
dialog input[type=color] { width: 100%; height: 34px; margin-top: 4px; padding: 2px; border: 1px solid var(--border); border-radius: 8px; background: none; }
dialog input[type=file] { margin-top: 4px; font-size: 12.5px; }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.grid4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin-top: 10px; }
.mt { margin-top: 10px; }
.muted { color: var(--muted); }
.small { font-size: 12px; margin-top: 6px; line-height: 1.5; }
.muted code { background: var(--bubble); border-radius: 4px; padding: 1px 5px; font-size: 11.5px; }
.btn-dark { margin-top: 14px; width: 100%; background: var(--dark); color: #fff; border: 0; border-radius: 10px; padding: 11px; font: inherit; font-weight: 600; cursor: pointer; }
.btn-dark:hover { opacity: .92; }
#logoPreview { display: inline-block; margin-top: 8px; background: #fff; border: 1px solid var(--border); border-radius: 8px; padding: 6px 10px; }
#logoPreview img { height: 28px; display: block; }
.ok { color: var(--ok); font-weight: 600; }
.warn { color: var(--warn); font-weight: 600; }

@media (max-width: 780px) {
  #sidebar { position: fixed; inset: 0 auto 0 0; z-index: 40; box-shadow: 0 0 40px rgba(0,0,0,.15); }
  .grid4 { grid-template-columns: 1fr 1fr; }
}

/* ---------------- login / cadastro ---------------- */
.auth-body { display: flex; align-items: center; justify-content: center; min-height: 100%; background: var(--side); }
.auth-wrap { width: min(380px, 92vw); }
.auth-logo { text-align: center; font-weight: 700; font-size: 22px; letter-spacing: -.01em; margin-bottom: 22px; }
.auth-card { background: var(--bg); border: 1px solid var(--border); border-radius: 16px; padding: 22px; box-shadow: 0 2px 16px rgba(0,0,0,.05); }
.auth-tabs { display: flex; gap: 4px; background: var(--side); border-radius: 10px; padding: 4px; margin-bottom: 18px; }
.auth-tab { flex: 1; background: none; border: 0; border-radius: 8px; padding: 8px; font: inherit; font-size: 13px; font-weight: 600; color: var(--muted); cursor: pointer; }
.auth-tab.active { background: var(--bg); color: var(--text); box-shadow: 0 1px 4px rgba(0,0,0,.08); }
.auth-form { display: flex; flex-direction: column; gap: 12px; }
.auth-form label { display: block; font-size: 12px; color: var(--muted); font-weight: 500; }
.auth-form input { width: 100%; margin-top: 4px; padding: 9px 11px; border: 1px solid var(--border); border-radius: 8px; font: inherit; font-size: 13.5px; }
.auth-error { font-size: 12.5px; color: var(--err); margin: -2px 0 0; }