:root {
  --bg: #f5f6f8;
  --panel: #ffffff;
  --ink: #1b1f24;
  --muted: #667085;
  --line: #e4e7ec;
  --accent: #2563eb;
  --accent-ink: #ffffff;
  --user: #e8f0fe;
  --bot: #f1f3f5;
  --tool: #fff8e6;
  --tool-line: #f0d48a;
  --ok: #16a34a;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --radius: 10px;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #0f1216; --panel: #171b21; --ink: #e6e8eb; --muted: #98a2b3; --line: #2a3038;
    --accent: #60a5fa; --accent-ink: #0b1220; --user: #1e2a44; --bot: #1f242b; --tool: #2a2410; --tool-line: #6b5a1d;
  }
}
* { box-sizing: border-box; }
html, body { margin: 0; background: var(--bg); color: var(--ink); font: 15px/1.45 var(--sans); }
a { color: var(--accent); }
.muted { color: var(--muted); }
.small { font-size: 12.5px; }
.mono { font-family: var(--mono); }
.spacer { flex: 1; }

.topbar { display: flex; gap: 16px; align-items: flex-start; justify-content: space-between; padding: 14px 16px 10px; border-bottom: 1px solid var(--line); background: var(--panel); }
.brand { display: flex; gap: 12px; align-items: flex-start; }
.logo { font-size: 28px; line-height: 1; }
h1 { margin: 0; font-size: 20px; }
.tagline { margin: 2px 0 0; color: var(--muted); font-size: 13px; max-width: 72ch; }
.topbar-right { display: flex; gap: 10px; align-items: center; white-space: nowrap; }
.badge { font-size: 11.5px; padding: 3px 8px; border: 1px solid var(--line); border-radius: 999px; color: var(--muted); }
.badge.llm { border-color: var(--ok); color: var(--ok); }

.layout { display: grid; grid-template-columns: minmax(320px, 430px) minmax(0, 1fr); gap: 16px; padding: 16px; min-height: calc(100vh - 140px); }
.chat-col { display: flex; flex-direction: column; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); min-height: 0; max-height: calc(100vh - 140px); }
.chat-head { display: flex; justify-content: space-between; align-items: baseline; padding: 10px 14px; border-bottom: 1px solid var(--line); }
.chat { flex: 1; overflow: auto; padding: 12px; display: flex; flex-direction: column; gap: 10px; min-height: 200px; }
.msg { max-width: 92%; padding: 8px 12px; border-radius: 12px; white-space: pre-wrap; word-wrap: break-word; }
.msg.user { align-self: flex-end; background: var(--user); border-bottom-right-radius: 3px; }
.msg.bot { align-self: flex-start; background: var(--bot); border-bottom-left-radius: 3px; }
.msg .who { display: block; font-size: 11px; color: var(--muted); margin-bottom: 2px; }
.typing::after { content: "▍"; animation: blink 1s steps(2) infinite; color: var(--muted); }
@keyframes blink { to { visibility: hidden; } }
.tool { align-self: stretch; border: 1px solid var(--tool-line); background: var(--tool); border-radius: 8px; font-size: 13px; }
.tool summary { cursor: pointer; padding: 6px 10px; font-family: var(--mono); font-size: 12.5px; display: flex; gap: 8px; align-items: center; }
.tool summary .state { margin-left: auto; font-family: var(--sans); color: var(--muted); font-size: 11.5px; }
.tool summary .state.done { color: var(--ok); }
.tool .body { padding: 0 10px 8px; }
.tool pre { margin: 4px 0 0; padding: 6px 8px; background: rgba(0,0,0,.05); border-radius: 6px; font-size: 12px; overflow: auto; white-space: pre-wrap; }
.tool .lbl { display: block; margin-top: 6px; font-size: 11px; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; }
.media { align-self: flex-start; display: flex; gap: 8px; align-items: center; padding: 6px 10px; border: 1px dashed var(--line); border-radius: 8px; font-size: 12.5px; color: var(--muted); background: var(--panel); }
.media.chart-card { align-self: stretch; display: block; }
.media.chart-card .chart-wrap { margin-top: 6px; }
.dots span { display: inline-block; width: 6px; height: 6px; margin-right: 3px; border-radius: 50%; background: var(--muted); animation: bounce 1s infinite; }
.dots span:nth-child(2) { animation-delay: .15s; } .dots span:nth-child(3) { animation-delay: .3s; }
@keyframes bounce { 0%, 80%, 100% { transform: translateY(0); opacity: .5; } 40% { transform: translateY(-4px); opacity: 1; } }

.chat-form { display: flex; gap: 8px; padding: 8px 12px; border-top: 1px solid var(--line); }
.chat-form input { flex: 1; font: inherit; font-size: 14px; padding: 7px 10px; border: 1px solid var(--line); border-radius: 8px; background: var(--panel); color: var(--ink); min-width: 0; }
.chat-form input:focus { outline: 2px solid color-mix(in srgb, var(--accent) 40%, transparent); border-color: var(--accent); }
.msg .note { display: block; margin-top: 4px; font-size: 11.5px; color: var(--muted); }
.msg a { color: var(--accent); }
.steps { border-top: 1px solid var(--line); padding: 10px 12px 12px; }
.steps-head { display: flex; gap: 8px; align-items: baseline; margin-bottom: 8px; flex-wrap: wrap; }
.step-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 6px; }
.step-list button { width: 100%; text-align: left; padding: 7px 10px; border: 1px solid var(--line); border-radius: 8px; background: var(--panel); color: var(--ink); font: inherit; font-size: 13.5px; cursor: pointer; display: flex; gap: 8px; align-items: flex-start; }
.step-list button .n { font-family: var(--mono); color: var(--muted); font-size: 12px; min-width: 1.3em; padding-top: 2px; }
.step-list button.next { border-color: var(--accent); box-shadow: 0 0 0 2px color-mix(in srgb, var(--accent) 25%, transparent); }
.step-list button.done { color: var(--muted); }
.step-list button.done .n { color: var(--ok); }
.step-list button:disabled { cursor: default; opacity: .6; }
.btn { font: inherit; font-size: 13px; padding: 5px 10px; border-radius: 8px; border: 1px solid var(--accent); background: var(--accent); color: var(--accent-ink); cursor: pointer; }
.btn.ghost { background: transparent; color: var(--accent); }
.btn:disabled { opacity: .5; cursor: default; }

.map-col { display: grid; grid-template-rows: minmax(360px, 1fr) auto; grid-template-columns: 1fr 1fr; gap: 12px; min-height: 0; }
.map { grid-column: 1 / -1; border-radius: var(--radius); border: 1px solid var(--line); min-height: 360px; background: #dde3ea; }
.panel { background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius); padding: 10px 12px; }
.panel-head { display: flex; gap: 8px; align-items: baseline; margin-bottom: 8px; flex-wrap: wrap; }
.imagery.inactive .controls, .imagery.inactive .stretch, .imagery.inactive .legend, .imagery.inactive .meta, .imagery.inactive #cursor-readout { opacity: .35; pointer-events: none; }
.controls { display: grid; grid-template-columns: repeat(auto-fit, minmax(120px, 1fr)); gap: 8px 12px; align-items: end; }
.controls label { display: flex; flex-direction: column; gap: 3px; font-size: 12px; color: var(--muted); }
.controls label.check { flex-direction: row; align-items: center; gap: 6px; padding-bottom: 6px; }
select, input[type=range] { font: inherit; font-size: 13px; width: 100%; }
select { padding: 4px 6px; border: 1px solid var(--line); border-radius: 6px; background: var(--panel); color: var(--ink); }
.stretch { margin-top: 10px; }
.stretch-row { display: grid; grid-template-columns: 1fr 1fr auto; gap: 8px; align-items: center; }
.legend { margin-top: 10px; }
#legend-bar { width: 100%; height: 12px; border-radius: 3px; border: 1px solid var(--line); display: block; }
.legend-labels { display: flex; justify-content: space-between; margin-top: 2px; }
.meta { margin-top: 8px; color: var(--muted); }
.meta b { color: var(--ink); }
#cursor-readout { margin-top: 6px; }

#chart, .chart-wrap { position: relative; }
#chart svg { width: 100%; height: auto; display: block; }
.cc-tip { position: absolute; pointer-events: none; background: var(--ink); color: var(--bg); font-size: 11.5px; padding: 4px 7px; border-radius: 6px; white-space: nowrap; transform: translate(-50%, -115%); display: none; z-index: 5; }
.cc-hit { fill: transparent; stroke: none; cursor: pointer; }
.chart-wrap svg { width: 100%; height: auto; display: block; }
.cc-line { fill: none; stroke: var(--muted); stroke-width: 1.5; opacity: .6; }
.cc-dot { fill: var(--panel); stroke: var(--muted); stroke-width: 1.5; }
.cc-dot.rec { fill: var(--accent); stroke: var(--accent); cursor: pointer; }
.cc-dot.sel { stroke: var(--ink); stroke-width: 3; }
.cc-axis { stroke: var(--line); stroke-width: 1; }
.cc-txt { fill: var(--muted); font-size: 10px; font-family: var(--sans); }

.leaflet-container { font: inherit; }
.leaflet-container .leaflet-popup-content { font-size: 12.5px; margin: 8px 12px; }
.bbox-rect { stroke-dasharray: 6 4; }
.foot { padding: 6px 16px 16px; }

@media (max-width: 900px) {
  .layout { grid-template-columns: 1fr; padding: 10px; gap: 10px; min-height: 0; }
  .chat-col { max-height: none; }
  .chat { max-height: 50vh; }
  .map-col { grid-template-columns: 1fr; grid-template-rows: auto auto auto; }
  .map { height: 55vh; min-height: 320px; }
  .topbar { flex-direction: column; gap: 8px; }
  .topbar-right { white-space: normal; }
}