/* Huawei Cloud–inspired theme. */
:root {
  --hw-red: #c7000b;
  --hw-red-2: #e60012;
  --hw-blue: #3270f6;
  --hw-blue-hover: #1c5be0;
  --hw-bg: #f5f6f8;
  --hw-panel: #ffffff;
  --hw-panel-2: #fafbfc;
  --hw-border: #e5e6eb;
  --hw-border-strong: #c9cdd4;
  --hw-text: #1d2129;
  --hw-text-2: #4e5969;
  --hw-muted: #86909c;
  --hw-ok: #00b42a;
  --hw-warn: #ff7d00;
  --hw-err: #f53f3f;
  --hw-user: #e8f3ff;
  --hw-asst: #f7f8fa;
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body {
  margin: 0; min-height: 100%; background: var(--hw-bg); color: var(--hw-text);
  font-family: "HarmonyOS Sans", "PingFang SC", -apple-system, BlinkMacSystemFont,
    "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  font-size: 14px; line-height: 1.5;
}

/* ============ Header ============ */
header { background: var(--hw-panel); border-bottom: 1px solid var(--hw-border); }
header::before { content: ""; display: block; height: 3px;
  background: linear-gradient(90deg, var(--hw-red) 0%, var(--hw-red-2) 100%); }
.header-inner { display: flex; align-items: center; gap: 20px; padding: 12px 24px; }

.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark {
  background: var(--hw-red);
  color: #fff;
  font-weight: 700;
  font-size: 12px;
  letter-spacing: 1.5px;
  padding: 5px 10px;
  border-radius: 2px;
  font-family: -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  line-height: 1;
}
.brand-title { font-size: 15px; font-weight: 600; color: var(--hw-text); }

.tabs { display: flex; gap: 4px; margin-left: auto; }
.tab { background: transparent; color: var(--hw-text-2); border: none; padding: 8px 18px;
  border-radius: 4px; font-size: 13px; font-weight: 500; cursor: pointer; width: auto; margin: 0; }
.tab:hover { background: var(--hw-panel-2); color: var(--hw-text); }
.tab.active { background: var(--hw-blue); color: white; }

.header-link {
  background: transparent; color: var(--hw-text-2); border: none; padding: 6px 10px;
  cursor: pointer; font-size: 13px; width: auto; margin: 0; border-radius: 4px;
}
.header-link:hover { background: var(--hw-panel-2); color: var(--hw-red); }

/* Region/residency: quiet, console-style indicator */
.region-tag {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 4px 10px; border-radius: 4px; font-size: 12px;
  background: var(--hw-panel-2); border: 1px solid var(--hw-border);
  color: var(--hw-text);
}
.region-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--hw-muted); flex-shrink: 0; }
.region-name { font-weight: 500; }
.region-code {
  font-family: "SF Mono", Monaco, "Cascadia Code", Consolas, monospace;
  font-size: 11px; color: var(--hw-muted);
  padding-left: 8px; margin-left: 2px; border-left: 1px solid var(--hw-border);
}
.region-ok      .region-dot { background: var(--hw-ok); }
.region-warn    .region-dot { background: var(--hw-warn); }
.region-unknown .region-dot { background: var(--hw-muted); }

/* ============ Login screen ============ */
.login-screen {
  position: fixed; inset: 0;
  background: linear-gradient(135deg, #f0f2f5 0%, #e8ecf2 100%);
  display: flex; align-items: center; justify-content: center; z-index: 100;
}
.login-card {
  background: var(--hw-panel);
  border: 1px solid var(--hw-border);
  border-radius: 8px;
  padding: 36px 40px;
  width: 100%; max-width: 380px;
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.04);
}
.login-card .brand-stack {
  flex-direction: column; align-items: flex-start; gap: 12px; margin-bottom: 24px;
}
.login-card .brand-title { font-size: 20px; }
.login-hint { color: var(--hw-text-2); margin: 0 0 18px 0; font-size: 13px; }
.login-card form label { margin-bottom: 14px; color: var(--hw-text-2); }
.login-card input[type="password"] { padding: 9px 12px; font-size: 14px; }
.login-card button { margin-top: 8px; padding: 10px 16px; font-size: 14px; }
.login-error {
  background: #fff2f0; color: var(--hw-err); border: 1px solid #ffccc7;
  padding: 8px 12px; border-radius: 4px; font-size: 12px; margin-bottom: 10px;
}
.login-footer { color: var(--hw-muted); font-size: 12px; margin: 20px 0 0 0; text-align: center; }

/* ============ View switching ============ */
.view { display: none; }
.view.active { display: grid; }

/* ============ Playground view ============ */
#view-playground { grid-template-columns: 280px 1fr 320px; gap: 16px; padding: 16px;
  height: calc(100vh - 52px); }
#view-playground aside, #view-playground section {
  background: var(--hw-panel); border: 1px solid var(--hw-border);
  border-radius: 6px; overflow: hidden; display: flex; flex-direction: column;
}
.config, .metrics { overflow-y: auto; padding: 18px; }

h2 { margin: 0 0 14px 0; font-size: 13px; font-weight: 600; color: var(--hw-text);
  padding-bottom: 10px; border-bottom: 1px solid var(--hw-border); }
h3 { margin: 18px 0 10px 0; font-size: 12px; font-weight: 600; color: var(--hw-text-2);
  text-transform: uppercase; letter-spacing: 0.6px; }

label { display: block; margin-bottom: 14px; font-size: 13px; color: var(--hw-text-2); font-weight: 500; }
label.row { display: flex; align-items: center; gap: 8px; font-weight: 400; }
label.row input[type="checkbox"] { width: auto; margin: 0; }
label.inline { display: inline-flex; align-items: center; gap: 8px; margin: 0; font-size: 12px; }
label.inline select { margin: 0; width: auto; padding: 6px 10px; }

input[type="text"], input[type="password"], input[type="number"],
input[type="range"], select, textarea {
  width: 100%; margin-top: 6px; padding: 7px 11px; background: var(--hw-panel);
  color: var(--hw-text); border: 1px solid var(--hw-border-strong);
  border-radius: 4px; font-size: 13px; font-family: inherit; line-height: 1.5;
  transition: border-color 0.15s, box-shadow 0.15s;
}
input:hover, select:hover, textarea:hover { border-color: var(--hw-muted); }
input:focus, select:focus, textarea:focus {
  outline: none; border-color: var(--hw-blue); box-shadow: 0 0 0 2px rgba(50, 112, 246, 0.15);
}
textarea { resize: vertical; }
input[type="range"] { padding: 0; border: none; height: 4px; }

button { width: 100%; padding: 8px 16px; background: var(--hw-blue); color: white;
  border: 1px solid var(--hw-blue); border-radius: 4px; font-weight: 500; font-size: 13px;
  cursor: pointer; margin-top: 8px; transition: background 0.15s, border-color 0.15s;
  font-family: inherit; }
button:hover { background: var(--hw-blue-hover); border-color: var(--hw-blue-hover); }
button.secondary { background: var(--hw-panel); color: var(--hw-text); border-color: var(--hw-border-strong); }
button.secondary:hover { background: var(--hw-panel-2); border-color: var(--hw-muted); color: var(--hw-text); }
button.danger { background: var(--hw-panel); color: var(--hw-err); border-color: #ffccc7; }
button.danger:hover { background: #fff2f0; }
button:disabled { opacity: 0.5; cursor: not-allowed; }

/* ============ Chat ============ */
.chat { padding: 0; }
.messages { flex: 1; padding: 20px 24px; overflow-y: auto;
  display: flex; flex-direction: column; gap: 14px; background: var(--hw-panel-2); }
.messages:empty::before { content: "Ready. Pick a model and send your first prompt.";
  color: var(--hw-muted); font-size: 13px; align-self: center; margin-top: 60px; }
.msg { padding: 12px 16px; border-radius: 8px; max-width: 78%;
  white-space: pre-wrap; word-wrap: break-word; line-height: 1.6;
  font-size: 14px; border: 1px solid var(--hw-border); }
.msg.user { background: var(--hw-user); align-self: flex-end; border-color: #c2dbff; }
.msg.assistant { background: var(--hw-asst); align-self: flex-start; }
.msg.error { background: #fff2f0; color: var(--hw-err); border-color: #ffccc7; align-self: stretch; max-width: 100%; }
.msg .role { font-size: 11px; color: var(--hw-muted); margin-bottom: 6px;
  text-transform: uppercase; letter-spacing: 0.8px; font-weight: 600; }

#composer { display: flex; gap: 10px; padding: 14px 20px;
  border-top: 1px solid var(--hw-border); background: var(--hw-panel);
  align-items: flex-end; }
#composer textarea { flex: 1; margin: 0; min-height: 64px; }
#composer button { width: auto; min-width: 96px; height: 36px; margin: 0; }

/* ============ Metrics panel ============ */
.metrics dl { display: grid; grid-template-columns: 1fr auto; gap: 8px 12px;
  margin: 0 0 16px 0; padding: 12px 14px;
  background: var(--hw-panel-2); border: 1px solid var(--hw-border); border-radius: 4px; }
.metrics dt { color: var(--hw-text-2); font-size: 12px; }
.metrics dd { margin: 0; font-variant-numeric: tabular-nums; text-align: right;
  font-weight: 500; color: var(--hw-text); font-size: 13px; }
.metrics details { margin-top: 12px; font-size: 12px; }
.metrics summary { cursor: pointer; color: var(--hw-blue); padding: 6px 0; user-select: none; }
.metrics summary:hover { color: var(--hw-blue-hover); }
.metrics pre { background: var(--hw-panel-2); padding: 10px; border-radius: 4px;
  font-size: 11px; overflow-x: auto; color: var(--hw-text-2);
  border: 1px solid var(--hw-border);
  font-family: "SF Mono", Monaco, "Cascadia Code", "Roboto Mono", Consolas, monospace; }

/* ============ Analytics view ============ */
.view-analytics { display: none; grid-template-columns: 1fr; gap: 16px;
  padding: 16px; min-height: calc(100vh - 52px); }
.view-analytics.active { display: grid; }

.analytics-toolbar { display: flex; align-items: center; justify-content: space-between;
  background: var(--hw-panel); border: 1px solid var(--hw-border);
  border-radius: 6px; padding: 12px 18px; gap: 16px; flex-wrap: wrap; }
.analytics-toolbar h2 { margin: 0; padding: 0; border: none; font-size: 15px; }
.toolbar-controls { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.toolbar-controls button { width: auto; margin: 0; padding: 7px 14px; }

.cards { display: grid; grid-template-columns: repeat(6, 1fr); gap: 16px; }
.card { background: var(--hw-panel); border: 1px solid var(--hw-border);
  border-radius: 6px; padding: 16px 18px; }
.card-label { font-size: 12px; color: var(--hw-text-2); text-transform: uppercase;
  letter-spacing: 0.6px; margin-bottom: 8px; font-weight: 500; }
.card-value { font-size: 22px; font-weight: 600; color: var(--hw-text);
  font-variant-numeric: tabular-nums; }

.charts { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.chart-card { background: var(--hw-panel); border: 1px solid var(--hw-border);
  border-radius: 6px; padding: 16px 18px; }
.chart-card h3 { margin: 0 0 10px 0; padding: 0; text-transform: none;
  letter-spacing: 0; font-size: 13px; color: var(--hw-text); font-weight: 600; }
.chart-card canvas { width: 100% !important; height: 240px !important; }

.history { background: var(--hw-panel); border: 1px solid var(--hw-border);
  border-radius: 6px; padding: 16px 18px; }
.history-head { display: flex; align-items: baseline; justify-content: space-between;
  margin-bottom: 10px; }
.history-head h3 { margin: 0; padding: 0; text-transform: none; letter-spacing: 0;
  font-size: 14px; color: var(--hw-text); font-weight: 600; }
.muted { color: var(--hw-muted); font-size: 12px; }
.table-wrap { overflow-x: auto; max-height: 480px; overflow-y: auto;
  border: 1px solid var(--hw-border); border-radius: 4px; }
table { width: 100%; border-collapse: collapse; font-size: 12.5px;
  font-variant-numeric: tabular-nums; }
thead th { position: sticky; top: 0; background: var(--hw-panel-2);
  text-align: left; padding: 10px 12px; font-weight: 600; font-size: 12px;
  color: var(--hw-text-2); border-bottom: 1px solid var(--hw-border); white-space: nowrap; }
tbody td { padding: 8px 12px; border-bottom: 1px solid var(--hw-border); white-space: nowrap; }
tbody tr:hover { background: var(--hw-panel-2); }
th.num, td.num { text-align: right; }
.model-pill { display: inline-block; padding: 2px 8px; border-radius: 10px;
  font-size: 11px; background: var(--hw-user); color: var(--hw-blue);
  border: 1px solid #c2dbff; }

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--hw-border-strong); border-radius: 5px; }
::-webkit-scrollbar-thumb:hover { background: var(--hw-muted); }

@media (max-width: 1200px) {
  .cards { grid-template-columns: repeat(3, 1fr); }
  .charts { grid-template-columns: 1fr; }
}
@media (max-width: 1100px) {
  #view-playground { grid-template-columns: 1fr; height: auto; }
  .chat { min-height: 60vh; }
}