:root {
  --sn-ink: #092033;
  --sn-ink-soft: #24455f;
  --sn-blue-dark: #082746;
  --sn-blue: #0f5c93;
  --sn-blue-bright: #43a3dd;
  --sn-blue-pale: #e6f4fb;
  --sn-border: rgba(32, 102, 148, 0.25);
  --sn-panel: rgba(255, 255, 255, 0.92);
  --sn-shadow: 0 22px 60px rgba(8, 39, 70, 0.16);
  --sn-radius: 24px;
  --sn-radius-small: 14px;
  --sn-bg: #f1f8fc;
  --sn-line: rgba(67, 163, 221, 0.35);
  --sn-success: #0f735a;
  --sn-warn: #966b00;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--sn-ink);
  background:
    radial-gradient(circle at 12% 10%, rgba(67, 163, 221, 0.22), transparent 34rem),
    linear-gradient(180deg, #f7fcff 0%, #eaf6fc 46%, #f8fcff 100%);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.5;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(15, 92, 147, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(15, 92, 147, 0.04) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: linear-gradient(180deg, rgba(0,0,0,0.72), rgba(0,0,0,0.12));
}

a { color: var(--sn-blue); }

button, input, select, textarea { font: inherit; }

.site-topline {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.8rem clamp(1rem, 3vw, 2.5rem);
  background: rgba(246, 252, 255, 0.88);
  border-bottom: 1px solid var(--sn-border);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--sn-blue-dark);
  font-weight: 800;
  letter-spacing: 0.02em;
  text-decoration: none;
}

.brand::first-letter { color: var(--sn-blue-bright); }

.brand span {
  font-weight: 650;
  color: var(--sn-ink-soft);
}

.site-topline nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  justify-content: flex-end;
}

.site-topline nav a {
  color: var(--sn-ink-soft);
  text-decoration: none;
  padding: 0.45rem 0.75rem;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 0.92rem;
}

.site-topline nav a:hover {
  border-color: var(--sn-border);
  background: rgba(255,255,255,0.8);
}

main {
  width: min(1500px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 1.25rem 0 4rem;
}

.hero-panel,
.control-panel,
.map-panel,
.outputs-panel,
.methodology-panel,
.annotations-panel,
.text-card,
.chart-card,
.metric-card,
.scope-card {
  background: var(--sn-panel);
  border: 1px solid var(--sn-border);
  box-shadow: var(--sn-shadow);
  border-radius: var(--sn-radius);
}

.hero-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 420px);
  gap: 1.4rem;
  align-items: stretch;
  padding: clamp(1.25rem, 3vw, 2.25rem);
  overflow: hidden;
  position: relative;
}

.hero-panel::after {
  content: "";
  position: absolute;
  right: -8rem;
  top: -8rem;
  width: 24rem;
  height: 24rem;
  border-radius: 50%;
  border: 1px solid rgba(67, 163, 221, 0.35);
  background: radial-gradient(circle, rgba(67,163,221,0.15), transparent 68%);
}

.hero-copy, .scope-card { position: relative; z-index: 1; }

.eyebrow {
  margin: 0 0 0.35rem;
  color: var(--sn-blue);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

h1, h2, h3 { line-height: 1.12; color: var(--sn-blue-dark); }

h1 {
  font-size: clamp(2.2rem, 5vw, 4.8rem);
  margin: 0 0 0.9rem;
  letter-spacing: -0.045em;
}

h2 { font-size: clamp(1.35rem, 2vw, 2rem); margin: 0 0 0.75rem; }
h3 { margin: 0 0 0.75rem; }
p { margin-top: 0; }

.hero-copy p:last-child { max-width: 76ch; font-size: 1.08rem; color: var(--sn-ink-soft); }

.scope-card {
  padding: 1.25rem;
  background: linear-gradient(145deg, rgba(8, 39, 70, 0.94), rgba(15, 92, 147, 0.88));
  color: white;
  align-self: center;
}

.scope-card h2 { color: white; }
.scope-card p { color: rgba(255,255,255,0.84); margin-bottom: 0; }

.workspace-grid {
  display: grid;
  grid-template-columns: minmax(360px, 0.76fr) minmax(420px, 1.24fr);
  gap: 1rem;
  margin-top: 1rem;
  align-items: start;
}

.control-panel,
.map-panel,
.outputs-panel,
.methodology-panel,
.annotations-panel {
  padding: 1.1rem;
}

.control-panel {
  display: grid;
  gap: 1rem;
}

.panel-heading { margin-bottom: 0.5rem; }

.field-row {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.8rem;
  align-items: end;
}

.field-block {
  display: grid;
  gap: 0.35rem;
}

.full-span { grid-column: 1 / -1; }

.field-block span,
.slider-grid span {
  color: var(--sn-ink-soft);
  font-size: 0.85rem;
  font-weight: 760;
}

input, select, textarea {
  width: 100%;
  border: 1px solid var(--sn-border);
  border-radius: 14px;
  padding: 0.78rem 0.85rem;
  background: rgba(255,255,255,0.94);
  color: var(--sn-ink);
  outline: none;
}

textarea { resize: vertical; }

input:focus, select:focus, textarea:focus {
  border-color: var(--sn-blue-bright);
  box-shadow: 0 0 0 4px rgba(67, 163, 221, 0.16);
}

.era-input {
  display: grid;
  grid-template-columns: 1fr 92px;
  gap: 0.35rem;
}

.advanced-controls {
  border: 1px solid var(--sn-border);
  background: rgba(230, 244, 251, 0.48);
  border-radius: 18px;
  padding: 0.85rem;
}

.advanced-controls summary {
  cursor: pointer;
  color: var(--sn-blue-dark);
  font-weight: 800;
}

.slider-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem;
  margin-top: 0.85rem;
}

.slider-grid label {
  display: grid;
  grid-template-columns: 1fr auto;
  grid-template-areas: "label output" "range range";
  gap: 0.2rem 0.7rem;
  align-items: center;
}

.slider-grid span { grid-area: label; }
.slider-grid output { grid-area: output; font-size: 0.85rem; font-weight: 800; color: var(--sn-blue); }
.slider-grid input { grid-area: range; padding: 0; accent-color: var(--sn-blue); }

.action-row,
.toolbar-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  align-items: center;
}

.primary-btn,
.secondary-btn,
.chip {
  border: 1px solid var(--sn-border);
  border-radius: 999px;
  padding: 0.75rem 1rem;
  cursor: pointer;
  font-weight: 800;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.primary-btn {
  color: white;
  border-color: rgba(15, 92, 147, 0.25);
  background: linear-gradient(135deg, var(--sn-blue-dark), var(--sn-blue));
  box-shadow: 0 12px 26px rgba(15, 92, 147, 0.24);
}

.primary-btn:disabled,
.secondary-btn:disabled { opacity: 0.55; cursor: not-allowed; }

.secondary-btn,
.chip {
  color: var(--sn-blue-dark);
  background: rgba(255,255,255,0.9);
}

.chip { padding: 0.55rem 0.75rem; font-size: 0.86rem; }
.chip.active { color: white; background: var(--sn-blue); }
button:not(:disabled):hover { transform: translateY(-1px); }

.map-panel { min-height: 690px; }
.map-toolbar {
  display: flex;
  gap: 1rem;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 0.85rem;
}

.map-canvas {
  width: 100%;
  height: 560px;
  border-radius: 22px;
  overflow: hidden;
  border: 1px solid var(--sn-border);
  background: #d8ecf7;
}

.layer-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 0.75rem;
  color: var(--sn-ink-soft);
  font-weight: 700;
}

.layer-controls input { width: auto; }

.outputs-panel,
.methodology-panel,
.annotations-panel { margin-top: 1rem; }

.output-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.8rem;
}

.metric-card {
  padding: 1rem;
  display: grid;
  gap: 0.35rem;
  box-shadow: none;
  background: rgba(255,255,255,0.72);
}

.metric-card span { color: var(--sn-ink-soft); font-weight: 760; font-size: 0.86rem; }
.metric-card strong { color: var(--sn-blue-dark); font-size: clamp(1.3rem, 2.1vw, 2.15rem); line-height: 1.05; }
.metric-card small { color: var(--sn-ink-soft); }

.chart-grid,
.analysis-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.9rem;
  margin-top: 0.9rem;
}

.chart-card,
.text-card {
  padding: 1rem;
  box-shadow: none;
  background: rgba(255,255,255,0.72);
}

.chart-card canvas { max-height: 310px; }

table { width: 100%; border-collapse: collapse; }
td, th { padding: 0.65rem 0.5rem; border-bottom: 1px solid rgba(32,102,148,0.13); vertical-align: top; }
td:last-child { font-weight: 750; color: var(--sn-blue-dark); }

.text-card ul,
.report-shell ul { padding-left: 1.15rem; }
.text-card li,
.report-shell li { margin-bottom: 0.45rem; }

.pdf-frame-wrap {
  border: 1px solid var(--sn-border);
  border-radius: 22px;
  overflow: hidden;
  background: white;
  min-height: 620px;
}

.pdf-frame-wrap iframe {
  display: block;
  width: 100%;
  height: 620px;
  border: 0;
}

.inline-link {
  display: inline-flex;
  margin-top: 0.8rem;
  color: var(--sn-blue-dark);
  font-weight: 800;
  text-decoration: none;
  border-bottom: 2px solid var(--sn-blue-bright);
}

.comment-form {
  display: grid;
  grid-template-columns: minmax(220px, 0.35fr) minmax(0, 1fr) auto;
  gap: 0.8rem;
  align-items: end;
}

.comment-list {
  display: grid;
  gap: 0.75rem;
  margin-top: 1rem;
}

.comment-card {
  padding: 0.9rem;
  background: rgba(255,255,255,0.72);
  border: 1px solid var(--sn-border);
  border-radius: 16px;
}
.comment-card header { display: flex; flex-wrap: wrap; gap: 0.6rem; color: var(--sn-ink-soft); font-size: 0.86rem; margin-bottom: 0.45rem; }
.comment-card strong { color: var(--sn-blue-dark); }
.comment-card p { white-space: pre-wrap; margin: 0; }

.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 80;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  background: rgba(5, 20, 34, 0.62);
  backdrop-filter: blur(8px);
}

.modal-backdrop.active { display: flex; }

.modal-card {
  width: min(560px, 100%);
  background: white;
  border: 1px solid var(--sn-border);
  border-radius: 24px;
  box-shadow: 0 30px 90px rgba(0,0,0,0.25);
  padding: 1.25rem;
}

.progress-track {
  width: 100%;
  height: 14px;
  background: var(--sn-blue-pale);
  border-radius: 999px;
  overflow: hidden;
  border: 1px solid var(--sn-border);
  margin: 1rem 0;
}

#progressBar {
  width: 0%;
  height: 100%;
  background: linear-gradient(90deg, var(--sn-blue), var(--sn-blue-bright));
  transition: width 0.28s ease;
}

#progressSteps {
  padding-left: 1.1rem;
  color: var(--sn-ink-soft);
}

#progressSteps li.done { color: var(--sn-success); font-weight: 800; }

.report-shell {
  width: 8.2in;
  background: #fff;
  color: #0b2133;
  padding: 0.45in;
  font-family: Inter, Arial, sans-serif;
  border: 4px solid #0f5c93;
}

.report-shell .report-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  border-bottom: 2px solid #0f5c93;
  padding-bottom: 0.18in;
  margin-bottom: 0.18in;
}

.report-shell h1 { font-size: 26px; color: #082746; margin: 0; letter-spacing: -0.02em; }
.report-shell h2 { font-size: 16px; color: #0f5c93; border-bottom: 1px solid rgba(15,92,147,0.25); padding-bottom: 4px; margin-top: 18px; }
.report-shell p, .report-shell li, .report-shell td { font-size: 11.5px; line-height: 1.45; }
.report-shell section { break-inside: avoid; }
.report-shell table { border: 1px solid rgba(15,92,147,0.22); }
.report-shell td { border: 1px solid rgba(15,92,147,0.16); }
.report-shell .eyebrow { font-size: 9px; margin: 0 0 4px; color: #0f5c93; }
.report-badge { border: 1px solid #0f5c93; border-radius: 999px; padding: 0.08in 0.16in; color: #0f5c93; font-weight: 800; font-size: 11px; white-space: nowrap; }
.report-image { max-width: 100%; border: 1px solid rgba(15,92,147,0.28); margin: 0.08in 0 0.12in; }
.report-shell footer { margin-top: 0.18in; padding-top: 0.12in; border-top: 1px solid rgba(15,92,147,0.28); color: #38586c; font-size: 10px; }

@media (max-width: 1120px) {
  .workspace-grid, .hero-panel, .chart-grid, .analysis-grid { grid-template-columns: 1fr; }
  .map-panel { min-height: auto; }
  .output-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 760px) {
  main { width: min(100% - 1rem, 1500px); }
  .site-topline { align-items: flex-start; flex-direction: column; }
  .field-row, .slider-grid, .output-grid, .comment-form { grid-template-columns: 1fr; }
  .map-toolbar { align-items: stretch; flex-direction: column; }
  .map-canvas { height: 460px; }
  .hero-panel, .control-panel, .map-panel, .outputs-panel, .methodology-panel, .annotations-panel { border-radius: 18px; }
}

/* v1.1 additions */
.split-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
}
.version-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--sn-border);
  border-radius: 999px;
  padding: 0.35rem 0.65rem;
  font-size: 0.8rem;
  font-weight: 900;
  color: var(--sn-blue-dark);
  background: rgba(230, 244, 251, 0.8);
}
.scenario-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  align-items: center;
}
.info-tip {
  width: 1.15rem;
  height: 1.15rem;
  display: inline-grid;
  place-items: center;
  margin-left: 0.25rem;
  padding: 0;
  border: 1px solid var(--sn-border);
  border-radius: 50%;
  background: rgba(255,255,255,0.86);
  color: var(--sn-blue);
  font-size: 0.7rem;
  font-weight: 900;
  cursor: help;
}
.map-metrics {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  margin-top: 0.75rem;
  color: var(--sn-ink-soft);
  font-size: 0.86rem;
  font-weight: 750;
}
.map-metrics span {
  display: inline-flex;
  border: 1px solid var(--sn-border);
  border-radius: 999px;
  background: rgba(255,255,255,0.82);
  padding: 0.4rem 0.65rem;
}
.mode-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.9rem;
  margin-top: 0.9rem;
}
.mode-card-head {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 0.6rem;
}
.mode-card-head h3 { margin-bottom: 0; }
.mini-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  justify-content: flex-end;
}
.compact-chart {
  height: 260px;
  margin: 0.7rem 0;
  padding: 0.55rem;
  box-shadow: none;
}
.wide-modal { width: min(760px, 100%); }
.json-preview {
  max-height: 320px;
  overflow: auto;
  border: 1px solid var(--sn-border);
  border-radius: 16px;
  background: #f7fcff;
  color: var(--sn-ink);
  padding: 0.85rem;
  white-space: pre-wrap;
  font-size: 0.88rem;
}
.report-shell code {
  font-family: Consolas, Monaco, monospace;
  font-size: 10px;
  color: #082746;
}
.report-shell th {
  text-align: left;
  font-size: 11px;
  color: #082746;
  border: 1px solid rgba(15,92,147,0.16);
  background: rgba(230,244,251,0.55);
}
@media (max-width: 1120px) {
  .mode-grid { grid-template-columns: 1fr; }
}
@media (max-width: 760px) {
  .split-heading, .mode-card-head { flex-direction: column; }
  .scenario-actions, .mini-actions { align-items: stretch; }
  .scenario-actions button, .mini-actions button { width: 100%; }
}