:root {
  --bg: #0f1418;
  --panel: rgba(23, 30, 37, 0.94);
  --panel-2: #1f2830;
  --line: #2b3641;
  --ink: #e6e9ec;
  --dim: #98a3ad;
  --accent: #e8c36a;
  --accent-ink: #1a1408;
  --warn: #f0a06a;
  --ok: #7fc99a;
  --radius: 10px;
  color-scheme: dark;
}
* { box-sizing: border-box; }
[hidden] { display: none !important; }
html, body { margin: 0; background: var(--bg); color: var(--ink); }
body {
  font: 14px/1.45 system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
.dim { color: var(--dim); }

.masthead { display: flex; align-items: baseline; gap: 16px; flex-wrap: wrap; padding: 12px 16px 10px; }
.masthead h1 { margin: 0; font-size: 22px; letter-spacing: -0.01em; }
.masthead p { margin: 0; color: var(--dim); font-size: 13px; }

/* ---------- map stage ---------- */
#stage { position: relative; height: calc(100vh - 58px); min-height: 460px; }
#map { position: absolute; inset: 0; background: #0f1418; }
.leaflet-container { font: inherit; }
.base-flat .leaflet-tile { filter: saturate(0.7) brightness(0.92); }
.leaflet-control-attribution { background: rgba(15,20,24,0.8) !important; color: var(--dim) !important; font-size: 11px; }
.leaflet-control-attribution a { color: var(--accent) !important; }
.leaflet-bar { border: 1px solid var(--line) !important; box-shadow: 0 6px 20px rgba(0,0,0,0.4) !important; }
.leaflet-bar a { background: var(--panel-2) !important; color: var(--ink) !important; border-bottom-color: var(--line) !important; }
.leaflet-control-zoom { margin: 0 12px 12px 0 !important; }
.leaflet-bottom .leaflet-control-attribution { margin: 0 !important; }
.drapp-ov { transition: opacity 0.7s ease; }

.panel {
  position: absolute; z-index: 1000; background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: 0 8px 28px rgba(0,0,0,0.45); backdrop-filter: blur(6px);
}
.panel-addr { top: 12px; left: 12px; width: min(460px, calc(100% - 24px)); padding: 10px; }
.panel-years { top: 12px; right: 12px; width: 300px; padding: 8px; }
.panel-base { bottom: 12px; left: 12px; padding: 4px; }

.addrbar { display: flex; gap: 6px; }
.addrbar input {
  flex: 1 1 auto; min-width: 0; padding: 9px 11px; font: inherit; font-size: 15px;
  background: var(--bg); color: var(--ink); border: 1px solid var(--line); border-radius: 8px;
}
.addrbar input:focus { outline: 2px solid var(--accent); outline-offset: 1px; }
button, .btn {
  font: inherit; cursor: pointer; padding: 8px 12px; border-radius: 8px;
  background: var(--panel-2); color: var(--ink); border: 1px solid var(--line); text-decoration: none;
}
button:hover, .btn:hover { border-color: var(--dim); }
button:disabled { opacity: 0.4; cursor: default; }
button.primary { background: var(--accent); color: var(--accent-ink); border-color: var(--accent); font-weight: 600; }
#locate { font-size: 17px; line-height: 1; padding: 6px 10px; }
.row { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; margin-top: 8px; }
.seg { display: inline-flex; border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
.seg button { border: 0; border-radius: 0; padding: 6px 10px; background: transparent; font-size: 13px; }
.seg button + button { border-left: 1px solid var(--line); }
.seg button[aria-pressed="true"] { background: var(--accent); color: var(--accent-ink); font-weight: 600; }
.chip { padding: 6px 10px; font-size: 13px; }
#status { margin: 8px 0 0; color: var(--dim); font-size: 12.5px; }
#status:empty { display: none; }
#status.warn { color: var(--warn); }

/* ---------- year menu ---------- */
.yearbar { display: flex; gap: 6px; }
.yearbar button { padding: 7px 10px; }
#year-btn { flex: 1; font-weight: 600; font-size: 16px; text-align: left; }
#year-btn::after { content: " ▾"; color: var(--dim); font-weight: 400; }
#year-src { font-size: 12px; padding: 6px 4px 0; }
#year-src:empty { display: none; }
#year-menu { margin-top: 8px; border-top: 1px solid var(--line); padding-top: 6px; }

/* ---------- load this view ---------- */
#view-load { margin-top: 8px; }
.view-chip { width: 100%; text-align: left; border-color: var(--accent); color: var(--accent); }
.view-chip:disabled { border-color: var(--line); color: var(--dim); opacity: 1; }
.view-chip[aria-expanded="true"] { border-bottom-left-radius: 0; border-bottom-right-radius: 0; }
#view-panel { border: 1px solid var(--line); border-top: 0; border-radius: 0 0 8px 8px; padding: 8px; }
#view-desc { margin: 0 0 6px; font-size: 12px; }
#view-years { max-height: min(40vh, 320px); overflow-y: auto; }
.vrow { display: flex; align-items: baseline; gap: 8px; padding: 3px 4px; border-radius: 6px; font-size: 13px; cursor: pointer; }
.vrow:hover { background: var(--panel-2); }
.vrow.off { color: var(--dim); cursor: default; }
.vrow input { accent-color: var(--accent); margin: 0; align-self: center; }
.vrow b { min-width: 42px; }
.vrow em { font-style: normal; font-size: 11.5px; color: var(--dim); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.view-actions { margin-top: 8px; gap: 6px; }
.view-actions .primary { flex: 1; text-align: left; font-size: 13px; padding: 7px 10px; }
.view-note { margin: 8px 0 0; font-size: 11.5px; line-height: 1.35; }
.rows { max-height: min(60vh, 520px); overflow-y: auto; }
.yrow { display: flex; align-items: stretch; gap: 4px; }
.yrow + .yrow { margin-top: 2px; }
.yrow .pick {
  flex: 1; min-width: 0; display: grid; grid-template-columns: 48px 1fr; grid-template-rows: auto auto; column-gap: 8px; align-items: center;
  text-align: left; padding: 6px 8px; background: transparent; border-color: transparent;
}
.yrow .pick:hover { background: var(--panel-2); }
.yrow .pick[aria-pressed="true"] { border-color: var(--accent); }
.yrow .pick b { font-size: 15px; grid-row: 1 / 3; }
.yrow .st { font-size: 12px; color: var(--dim); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.yrow.ready .st { color: var(--ink); }
.yrow.failed .st, .yrow.download .st { color: var(--warn); }
.yrow.loading .st { color: var(--accent); }
.pbar { display: block; height: 3px; background: rgba(255,255,255,0.1); border-radius: 2px; overflow: hidden; margin-top: 3px; }
.pbar i { display: block; height: 100%; width: 0; background: var(--accent); transition: width 150ms linear; }
.yrow .files { position: relative; display: flex; }
.yrow .files summary { list-style: none; cursor: pointer; padding: 6px 8px; border-radius: 8px; color: var(--dim); align-self: center; }
.yrow .files summary::-webkit-details-marker { display: none; }
.yrow .files summary:hover { background: var(--panel-2); color: var(--ink); }
.yrow .files ul {
  position: absolute; right: 0; top: calc(100% + 2px); z-index: 3; margin: 0; padding: 8px 10px; list-style: none; min-width: 240px;
  background: var(--panel-2); border: 1px solid var(--line); border-radius: 8px; box-shadow: 0 8px 24px rgba(0,0,0,0.45); font-size: 12px;
}
.yrow .files li { white-space: nowrap; padding: 2px 0; }
.yrow .files li a { margin-left: 6px; }
.tname { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }
.fade { display: flex; align-items: center; gap: 8px; padding: 6px 4px 2px; font-size: 12px; color: var(--dim); }
.fade input[type="range"] { flex: 1; min-width: 60px; accent-color: var(--accent); }

/* ---------- base map picker ---------- */
#base-btn { font-size: 13px; padding: 7px 11px; background: transparent; border-color: transparent; }
#base-btn::before { content: "▦ "; color: var(--dim); }
#base-btn:hover { background: var(--panel-2); border-color: var(--line); }
#base-btn[aria-expanded="true"] { background: var(--panel-2); border-color: var(--line); }
#base-menu {
  position: absolute; bottom: calc(100% + 6px); left: 0; z-index: 3; width: 260px; max-width: calc(100vw - 24px);
  max-height: min(64vh, 560px); overflow-y: auto; padding: 6px;
  background: var(--panel); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: 0 8px 28px rgba(0,0,0,0.5); backdrop-filter: blur(6px);
}
.bgroup + .bgroup { border-top: 1px solid var(--line); margin-top: 6px; padding-top: 6px; }
.bgroup h3 { margin: 2px 6px; font-size: 11px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; color: var(--dim); }
.bgroup p { margin: 0 6px 4px; font-size: 11.5px; line-height: 1.35; }
.bpick {
  display: flex; align-items: baseline; gap: 8px; width: 100%; text-align: left;
  padding: 6px 8px; font-size: 13px; background: transparent; border-color: transparent;
}
.bpick:hover { background: var(--panel-2); }
.bpick[aria-pressed="true"] { border-color: var(--accent); font-weight: 600; }
.bpick em { font-style: normal; font-size: 11.5px; color: var(--dim); margin-left: auto; }

.menu-foot { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; border-top: 1px solid var(--line); margin-top: 6px; padding-top: 8px; font-size: 12px; color: var(--dim); }
.menu-foot label { display: flex; align-items: center; gap: 6px; flex: 1; }
.menu-foot input[type="range"] { flex: 1; min-width: 60px; accent-color: var(--accent); }
.menu-foot button { padding: 5px 9px; font-size: 12px; }

/* ---------- about ---------- */
.about { padding: 24px 16px 40px; color: var(--dim); font-size: 13.5px; max-width: 86ch; }
.about h2 { font-size: 15px; color: var(--ink); margin: 0 0 6px; }

@media (max-width: 640px) {
  .masthead p { display: none; }
  #stage { height: calc(100vh - 48px); }
  .panel-addr { left: 10px; top: 10px; width: calc(100% - 20px); }
  .panel-years { top: auto; bottom: 28px; right: 10px; left: 124px; width: auto; }
  .panel-base { bottom: 28px; left: 10px; right: auto; }
  #base-btn { max-width: 106px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .rows { max-height: 40vh; }
  .leaflet-control-zoom { display: none; }
  .leaflet-control-attribution { font-size: 10px; }
}