/* Visibility guard — must precede every layout rule that sets display. */
[hidden] { display: none !important; }

:root {
  --bg: #0e1116;
  --panel: #151a21;
  --panel-2: #1b212a;
  --line: #262d38;
  --text: #dfe5ec;
  --muted: #8b95a4;
  --accent: #5db2ff;
  --ok: #57c793;
  --err: #f2707f;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font: 15px/1.55 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

button {
  font: inherit;
  cursor: pointer;
  border-radius: 7px;
  border: 1px solid transparent;
  background: var(--accent);
  color: #06121f;
  font-weight: 600;
  padding: 9px 16px;
}
button:hover { filter: brightness(1.08); }
button:disabled { opacity: .5; cursor: default; filter: none; }

button.ghost {
  background: transparent;
  border-color: var(--line);
  color: var(--muted);
  font-weight: 500;
  padding: 6px 12px;
}
button.ghost:hover { color: var(--text); border-color: var(--muted); }

input, textarea {
  font: inherit;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 7px;
  color: var(--text);
  padding: 10px 12px;
  width: 100%;
}
input:focus, textarea:focus { outline: none; border-color: var(--accent); }

/* ---------- login ---------- */

.login-view {
  display: grid;
  place-items: center;
  min-height: 100vh;
  padding: 24px;
}

.login-card {
  width: 100%;
  max-width: 360px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 28px;
}
.login-card h1 { margin: 0 0 4px; font-size: 22px; }
.login-card .sub { margin: 0 0 22px; color: var(--muted); font-size: 14px; }
.login-card label {
  display: block;
  margin: 14px 0 6px;
  font-size: 13px;
  color: var(--muted);
}
.login-card button { width: 100%; margin-top: 22px; }
.login-error {
  margin: 14px 0 0;
  color: var(--err);
  font-size: 14px;
}
.login-card .note {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 12px;
  text-align: center;
}

/* ---------- shell ---------- */

.app-view {
  display: flex;
  flex-direction: column;
  height: 100vh;
}

.topbar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 16px;
  border-bottom: 1px solid var(--line);
  background: var(--panel);
  flex: 0 0 auto;
}
.brand { font-weight: 700; letter-spacing: .2px; }
.session, .user { color: var(--muted); font-size: 13px; font-family: var(--mono); }
.spacer { flex: 1; }

.grid {
  display: grid;
  grid-template-columns: minmax(340px, 4fr) 6fr;
  flex: 1;
  min-height: 0;
}

/* ---------- chat ---------- */

.chat-pane {
  display: flex;
  flex-direction: column;
  min-height: 0;
  border-right: 1px solid var(--line);
}

.messages {
  flex: 1;
  overflow-y: auto;
  padding: 18px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.msg { max-width: 92%; }
.msg .who {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--muted);
  margin-bottom: 5px;
}
.msg .body {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 11px 14px;
  white-space: pre-wrap;
  word-wrap: break-word;
}
.msg.user { align-self: flex-end; }
.msg.user .body { background: var(--panel-2); border-color: #2c3745; }
.msg.error .body { border-color: var(--err); color: var(--err); }

.status {
  color: var(--muted);
  font-size: 13px;
  font-style: italic;
  padding: 0 18px 10px;
}

.followups {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 0 18px 12px;
}
.followups button {
  background: transparent;
  border: 1px solid var(--line);
  color: var(--accent);
  font-weight: 500;
  font-size: 13px;
  padding: 6px 12px;
}

.composer {
  display: flex;
  gap: 10px;
  align-items: flex-end;
  padding: 14px 18px;
  border-top: 1px solid var(--line);
  background: var(--panel);
  flex: 0 0 auto;
}
.composer textarea { resize: vertical; min-height: 62px; }
.composer button { flex: 0 0 auto; }

/* ---------- right pane ---------- */

.right-pane {
  display: grid;
  grid-template-rows: 1fr 260px;
  min-height: 0;
}

.preview, .log {
  display: flex;
  flex-direction: column;
  min-height: 0;
}
.log { border-top: 1px solid var(--line); }

.preview-bar, .log-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 14px;
  border-bottom: 1px solid var(--line);
  background: var(--panel);
  flex: 0 0 auto;
}
.label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--muted);
  flex: 0 0 auto;
}
.preview-bar input { font-family: var(--mono); font-size: 13px; padding: 6px 10px; }
.count { color: var(--muted); font-size: 12px; margin-left: auto; }

.preview-frame { position: relative; flex: 1; min-height: 0; background: #fff; }
.preview-frame iframe { width: 100%; height: 100%; border: 0; display: block; }
.preview-empty {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  margin: 0;
  background: var(--bg);
  color: var(--muted);
  font-size: 14px;
}

.log-body {
  flex: 1;
  overflow-y: auto;
  padding: 10px 14px;
  font-family: var(--mono);
  font-size: 12.5px;
}

.entry { border-bottom: 1px solid var(--line); padding: 7px 0; }
.entry:last-child { border-bottom: 0; }
.entry .head {
  display: flex;
  gap: 8px;
  align-items: baseline;
  cursor: pointer;
}
.entry .dot { flex: 0 0 auto; }
.entry.ok .dot { color: var(--ok); }
.entry.err .dot { color: var(--err); }
.entry.wait .dot { color: var(--muted); }
.entry .name { color: var(--text); word-break: break-all; }
.entry .note { color: var(--muted); margin-left: auto; flex: 0 0 auto; }
.entry pre {
  margin: 8px 0 2px;
  padding: 9px 11px;
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--muted);
  overflow-x: auto;
  white-space: pre-wrap;
  word-break: break-all;
}

@media (max-width: 900px) {
  .grid { grid-template-columns: 1fr; grid-template-rows: 1fr 1fr; }
  .chat-pane { border-right: 0; border-bottom: 1px solid var(--line); }
}