:root {
  --bg: #f3f0e8;
  --panel: rgba(255, 255, 255, 0.9);
  --panel-border: rgba(28, 45, 67, 0.12);
  --ink: #162235;
  --muted: #5a677a;
  --accent: #0c6d7c;
  --accent-2: #d6721f;
  --ok: #1f8f4a;
  --warn: #bf5e09;
  --err: #b22a28;
  --shadow: 0 18px 45px rgba(14, 21, 35, 0.08);
  --radius: 16px;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  color: var(--ink);
  background: radial-gradient(circle at 12% 8%, #fbf8ef 0, #efe7d8 30%, #e7eef0 68%, #e3eaec 100%);
  font: 15px/1.45 "IBM Plex Sans", "Segoe UI", sans-serif;
}

.bg-grid {
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.25;
  background-image:
    linear-gradient(to right, rgba(22,34,53,0.06) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(22,34,53,0.06) 1px, transparent 1px);
  background-size: 28px 28px;
}

.app-shell {
  position: relative;
  max-width: 1440px;
  margin: 0 auto;
  padding: 20px;
}

.topbar {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
  min-height: 86px;
  margin-bottom: 16px;
}

.eyebrow {
  margin: 0;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 11px;
  color: var(--muted);
}

h1 {
  margin: 2px 0 0;
  font: 600 28px/1.1 "IBM Plex Sans", "Segoe UI", sans-serif;
}

h2 {
  margin: 0;
  font: 600 18px/1.2 "IBM Plex Sans", "Segoe UI", sans-serif;
}

.status-cluster {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 6px;
  min-width: 220px;
}

.status-cluster--hidden {
  display: none;
}

.partner-logos {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 18px;
  flex-wrap: wrap;
}

.partner-logo {
  display: block;
  width: auto;
  max-width: 100%;
  object-fit: contain;
}

.partner-logo--empa {
  max-height: 68px;
}

.partner-logo--tq {
  max-height: 60px;
}

.layout-grid {
  display: grid;
  grid-template-columns: minmax(360px, 480px) minmax(0, 1fr);
  gap: 16px;
  align-items: start;
}

.right-column {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px;
  backdrop-filter: blur(6px);
}

.panel-title-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 10px;
}

.muted { color: var(--muted); }
.small { font-size: 12px; }

.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 72px;
  padding: 4px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  background: rgba(22,34,53,0.08);
  color: var(--ink);
}
.badge.idle { background: rgba(22,34,53,0.08); }
.badge.loading { background: rgba(12,109,124,0.14); color: #0b5f6b; }
.badge.busy { background: rgba(191,94,9,0.14); color: #a0520c; }
.badge.error { background: rgba(178,42,40,0.14); color: #9a201f; }
.badge.ok { background: rgba(31,143,74,0.14); color: #1b7d41; }

label { display: grid; gap: 6px; }
label > span { font-size: 13px; color: var(--muted); }
input[type="text"], input[type="password"], input[type="number"], select {
  width: 100%;
  border-radius: 10px;
  border: 1px solid rgba(22,34,53,0.2);
  background: rgba(255,255,255,0.95);
  color: var(--ink);
  padding: 9px 10px;
  font: inherit;
}
input[type="range"] { width: 100%; accent-color: var(--accent); }

.checkbox-row {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  gap: 8px;
}
.checkbox-row.compact { grid-column: auto; align-self: end; min-height: 42px; }
.checkbox-row input { margin: 0; }
.checkbox-row span { margin: 0; color: var(--ink); }

.controls-panel, .result-panel { min-height: 540px; }
.control-block { display: grid; gap: 8px; margin-bottom: 14px; }
.control-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
}
output { font-variant-numeric: tabular-nums; font-weight: 600; }

.xy-pad-wrap {
  position: relative;
  border-radius: 14px;
  border: 1px solid rgba(22,34,53,0.15);
  background: linear-gradient(180deg, rgba(12,109,124,0.06), rgba(214,114,31,0.05));
  padding: 10px;
}
#xyPad {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 10px;
  background: #fbfcfd;
  cursor: crosshair;
  touch-action: none;
}
.xy-pad-labels {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  color: var(--muted);
  margin-top: 6px;
}
.xy-pad-ylabel {
  position: absolute;
  left: -6px;
  top: 50%;
  transform: translate(-100%, -50%) rotate(-90deg);
  transform-origin: center;
  color: var(--muted);
  font-size: 12px;
}

.pv-map-wrap {
  margin-top: 10px;
  border-radius: 14px;
  border: 1px solid rgba(22,34,53,0.12);
  background: rgba(255,255,255,0.7);
  padding: 10px;
}
.pv-map-wrap.pv-map-primary {
  margin-top: 0;
}

.hp-map-wrap {
  margin-top: 10px;
}

.legacy-pad {
  margin-top: 10px;
  border: 1px solid rgba(22,34,53,0.12);
  border-radius: 12px;
  background: rgba(255,255,255,0.5);
  overflow: hidden;
}

.legacy-pad > summary {
  cursor: pointer;
  list-style: none;
  padding: 9px 12px;
  font-size: 13px;
  color: var(--muted);
  user-select: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
}

.legacy-pad > summary::-webkit-details-marker {
  display: none;
}

.legacy-pad > summary::before {
  content: '\25B8';
  display: inline-block;
  margin-right: 8px;
  color: var(--accent);
}

.legacy-pad[open] > summary::before {
  content: '\25BE';
}

.legacy-pad .xy-pad-wrap {
  margin: 0 10px 10px;
}
.legacy-pad .pv-map-wrap {
  margin: 0 10px 10px;
}

.map-details > summary > span:first-child {
  color: var(--ink);
  font-weight: 600;
}

.map-details > summary > .muted {
  text-align: right;
}
.pv-map-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
  font-size: 13px;
  color: var(--ink);
}
#pvMapCanvas,
#hpMapCanvas {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 10px;
  background: #ffffff;
  border: 1px solid rgba(22,34,53,0.1);
  cursor: crosshair;
  touch-action: none;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin-bottom: 12px;
}

.view-mode-row {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.plot-mode-group {
  display: grid;
  gap: 6px;
}

.plot-mode-group > span:first-child {
  font-size: 13px;
  color: var(--muted);
}

.segmented-toggle {
  display: inline-flex;
  align-items: center;
  padding: 4px;
  border-radius: 999px;
  background: rgba(22,34,53,0.08);
  border: 1px solid rgba(22,34,53,0.1);
  width: fit-content;
}

.segmented-toggle__button {
  border: 0;
  background: transparent;
  color: var(--muted);
  border-radius: 999px;
  padding: 8px 14px;
  font: 600 13px/1 "IBM Plex Sans", "Segoe UI", sans-serif;
  cursor: pointer;
  transition: background 140ms ease, color 140ms ease, box-shadow 140ms ease;
}

.segmented-toggle__button.is-active {
  background: #ffffff;
  color: var(--ink);
  box-shadow: 0 4px 10px rgba(22,34,53,0.12);
}

.segmented-toggle__button:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  box-shadow: none;
}

.segmented-toggle__button:focus-visible {
  outline: 2px solid rgba(12,109,124,0.55);
  outline-offset: 1px;
}

.control-disabled {
  opacity: 0.55;
}

.control-disabled input,
.control-disabled select {
  cursor: not-allowed;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
}
.button {
  border: 1px solid rgba(22,34,53,0.15);
  background: rgba(255,255,255,0.92);
  color: var(--ink);
  border-radius: 10px;
  padding: 9px 12px;
  font: 600 14px/1 "IBM Plex Sans", "Segoe UI", sans-serif;
  cursor: pointer;
}
.button:hover { border-color: rgba(22,34,53,0.3); }
.button:disabled { opacity: 0.5; cursor: not-allowed; }
.button:disabled:hover { border-color: rgba(22,34,53,0.15); }
.button.primary { background: var(--accent); color: #fff; border-color: transparent; }
.button.secondary { background: rgba(12,109,124,0.08); color: #0b5f6b; }

.meta-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px 12px;
}
.meta-list div {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 8px 10px;
  border-radius: 10px;
  background: rgba(22,34,53,0.03);
}
.meta-list strong { font-variant-numeric: tabular-nums; }

.result-meta-inline { display: flex; align-items: center; gap: 8px; }
.result-frame {
  position: relative;
  min-height: 380px;
  border-radius: 14px;
  border: 1px solid rgba(22,34,53,0.12);
  background: linear-gradient(180deg, rgba(255,255,255,0.96), rgba(242,245,248,0.96));
  overflow: hidden;
}
#resultImage {
  display: block;
  width: 100%;
  height: auto;
  max-height: 78vh;
  object-fit: contain;
  background: #fff;
}

.about-panel h3,
.citation-panel h3 {
  margin: 0 0 8px;
  font: 600 15px/1.2 "IBM Plex Sans", "Segoe UI", sans-serif;
}

.about-panel p,
.citation-panel p {
  margin: 0;
  color: var(--muted);
}

.about-panel p + p {
  margin-top: 8px;
}

.info-card {
  padding: 14px 16px;
  border-radius: 14px;
  border: 1px solid rgba(22,34,53,0.1);
  background: rgba(255,255,255,0.72);
}

.info-card h3 {
  margin: 0 0 8px;
  font: 600 15px/1.2 "IBM Plex Sans", "Segoe UI", sans-serif;
}

.info-card p {
  margin: 0;
  color: var(--muted);
}

.info-card p + p {
  margin-top: 8px;
}

.citation-block {
  margin: 0;
  color: var(--muted);
  font: 14px/1.55 "IBM Plex Sans", "Segoe UI", sans-serif;
  word-break: break-word;
}

.citation-block a {
  color: var(--accent);
}

.placeholder {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  color: var(--muted);
  font-size: 14px;
}
.error-box {
  margin: 12px 0 0;
  padding: 10px 12px;
  border-radius: 12px;
  background: rgba(178,42,40,0.07);
  border: 1px solid rgba(178,42,40,0.15);
  color: #7a1e1d;
  white-space: pre-wrap;
  word-break: break-word;
  max-height: 180px;
  overflow: auto;
}
.hidden { display: none; }

@media (max-width: 1100px) {
  .layout-grid { grid-template-columns: 1fr; }
  .controls-panel, .result-panel { min-height: auto; }
  .status-cluster { align-items: flex-start; min-width: 0; }
  .partner-logos { justify-content: flex-start; }
  .topbar { flex-direction: column; }
}

@media (max-width: 700px) {
  .app-shell { padding: 12px; }
  .form-grid { grid-template-columns: 1fr; }
  .view-mode-row { grid-template-columns: 1fr; }
  h1 { font-size: 24px; }
  .meta-list { grid-template-columns: 1fr; }
}

/* ── Model mode bar ──────────────────────────────────── */
.model-mode-bar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.5rem 0 0.75rem;
}
.model-mode-label {
  font-size: 0.82rem;
  font-weight: 600;
  opacity: 0.7;
  white-space: nowrap;
}

/* ── Compare: side-by-side error maps ────────────────── */
.result-frame--compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
  min-height: auto;
  border: none;
  background: none;
  padding: 0;
}
.result-frame--compare .compare-pane:nth-child(3) {
  grid-column: 1 / -1;
}
.result-frame--compare.hidden { display: none; }
.result-frame.hidden { display: none; }
.compare-pane {
  position: relative;
  background: #fff;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid rgba(22,34,53,0.10);
}
.compare-pane img {
  width: 100%;
  height: auto;
  display: block;
}
.compare-label {
  position: absolute;
  top: 8px;
  left: 8px;
  background: rgba(0,0,0,0.72);
  color: #fff;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 4px;
  z-index: 2;
  letter-spacing: 0.03em;
}

/* ── Compare: metrics bar ────────────────────────────── */
.compare-metrics {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
  margin-top: 0.75rem;
}
.compare-metrics.hidden { display: none; }
.metric-card {
  background: #f5f7fa;
  border: 1px solid rgba(22,34,53,0.10);
  border-radius: 8px;
  padding: 0.7rem 0.85rem;
  font-size: 0.84rem;
  line-height: 1.7;
  color: #1a2233;
}
.metric-title {
  font-weight: 700;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.3rem;
}
.metric-card--classical .metric-title { color: #1565c0; }
.metric-card--hybrid .metric-title { color: #7b1fa2; }
.metric-card strong {
  font-variant-numeric: tabular-nums;
  color: #0d1117;
}