:root {
  color-scheme: dark;
  --sfi-gold: #d2af67;
  --sfi-gold-bright: #f1d58f;
  --sfi-blue: #bfe8fb;
  --sfi-ink: #020306;
  --sfi-panel-bg: linear-gradient(
    112deg,
    rgba(13, 18, 28, 0.74) 0%,
    rgba(10, 15, 24, 0.66) 54%,
    rgba(8, 13, 21, 0.5) 100%
  );
  --sfi-panel-border: rgba(191, 232, 251, 0.25);
  --sfi-panel-shadow:
    0 24px 80px rgba(0, 0, 0, 0.46),
    14px 0 48px rgba(0, 0, 0, 0.1),
    inset 0 1px rgba(255, 255, 255, 0.045);
  --sfi-panel-backdrop: blur(20px) saturate(115%);
  --sfi-panel-padding: 18px;
  --sfi-panel-padding-mobile: 13px 14px;
  --sfi-control-border: rgba(255, 255, 255, 0.22);
  --sfi-text: rgba(255, 255, 255, 0.9);
  --sfi-muted: rgba(255, 255, 255, 0.55);
  --sfi-blue-muted: rgba(191, 232, 251, 0.72);
  --sfi-readout: rgba(255, 255, 255, 0.92);
  --sfi-panel-width: 340px;
  --sfi-panel-left: clamp(16px, 3vw, 48px);
  --sfi-panel-top: clamp(16px, 3vw, 36px);
  --sfi-panel-gap: clamp(16px, 2vw, 28px);
  --sfi-desktop-composition-x: 55vw;
  --sfi-desktop-composition-y: 50%;
  --sfi-mobile-composition-x: 50%;
  --sfi-mobile-composition-y: 26%;
  --sfi-mobile-dock-composition-x: 50%;
  --sfi-mobile-dock-composition-y: 26%;
  --sfi-mobile-overlay-composition-y: 30.5%;
  --sfi-mobile-action-inset: 6px;
  --sfi-global-action-top: clamp(16px, 3vw, 34px);
  --sfi-global-action-right: clamp(16px, 3vw, 38px);
  --sfi-global-action-height: 38px;
  --sfi-global-action-row-gap: 8px;
  --sfi-viewport-actions-top: calc(var(--sfi-global-action-top) + var(--sfi-global-action-height) + var(--sfi-global-action-row-gap));
  --sfi-radius-panel: 18px;
  --sfi-radius-control: 999px;
  --sfi-space-section: 14px;
}

html,
body {
  width: 100%;
  min-height: 100%;
  margin: 0;
  padding: 0;
  background: var(--sfi-ink);
}

.sfi-app-shell,
.sfi-app-shell * { box-sizing: border-box; }

.sfi-app-shell {
  position: relative;
  width: 100%;
  height: 100vh;
  height: 100dvh;
  min-height: 100svh;
  overflow: hidden;
  --sfi-visual-center-x: var(--sfi-desktop-composition-x);
  --sfi-visual-center-y: var(--sfi-desktop-composition-y);
  color: #fff;
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.sfi-app-shell button,
.sfi-app-shell input { font: inherit; }

.sfi-app-shell button { color: inherit; }
.sfi-app-shell button:disabled { cursor: default; opacity: 0.45; }

/* The renderer always owns the full viewport; the panel is a translucent overlay. */
.sfi-layout-side-panel > .sfi-app-viewport {
  position: absolute;
  inset: 0;
  min-width: 0;
  overflow: hidden;
}

.sfi-app-viewport > canvas,
canvas.sfi-app-viewport {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 0;
}

[id].sfi-app-panel {
  position: absolute;
  z-index: 5;
  top: var(--sfi-panel-top);
  left: var(--sfi-panel-left);
  width: min(var(--sfi-panel-width), calc(100% - 32px));
  max-height: calc(100dvh - 32px);
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: var(--sfi-panel-padding);
  border: 1px solid var(--sfi-panel-border);
  border-radius: var(--sfi-radius-panel);
  background: var(--sfi-panel-bg);
  box-shadow: var(--sfi-panel-shadow);
  -webkit-backdrop-filter: var(--sfi-panel-backdrop);
  backdrop-filter: var(--sfi-panel-backdrop);
  scrollbar-width: thin;
  scrollbar-color: rgba(191, 232, 251, 0.3) transparent;
}

.sfi-app-title {
  margin: 0;
  font-size: 19px;
  font-weight: 500;
  letter-spacing: 0.075em;
  line-height: 1.15;
  text-transform: uppercase;
}

.sfi-app-subtitle {
  margin: 4px 0 0;
  color: var(--sfi-blue-muted);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.sfi-panel-header { margin-bottom: 16px; }

.sfi-institution {
  display: flex;
  align-items: center;
  gap: 7px;
  margin-bottom: 8px;
  color: rgba(255, 255, 255, 0.48);
  font-size: 8px;
  font-weight: 500;
  letter-spacing: 0.14em;
  line-height: 1.3;
  text-transform: uppercase;
}

.sfi-institution::before {
  width: 13px;
  height: 1px;
  flex: 0 0 auto;
  background: rgba(210, 175, 103, 0.72);
  content: "";
}

.sfi-panel-footer {
  display: grid;
  gap: 3px;
  margin-top: 16px;
  padding-top: 10px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.48);
  font-size: 8px;
  line-height: 1.3;
  letter-spacing: 0.045em;
}

.sfi-panel-footer small {
  color: rgba(255, 255, 255, 0.32);
  font-size: 8px;
  letter-spacing: 0.055em;
  text-transform: uppercase;
}

[id].sfi-app-panel label.sfi-control,
[id].sfi-app-panel > label {
  align-items: center;
  gap: 8px;
  margin-block: 10px;
  font-size: 13px;
  letter-spacing: 0.02em;
}

[id].sfi-app-panel output,
[id].sfi-app-panel label > span[id$="Val"] {
  color: rgba(255, 255, 255, 0.88);
  font-variant-numeric: tabular-nums;
}

[id].sfi-app-panel input[type="range"] {
  accent-color: var(--sfi-blue);
}

[id].sfi-app-panel button {
  min-height: 40px;
  margin: 0;
  padding: 8px 10px;
  border: 1px solid var(--sfi-control-border);
  border-radius: var(--sfi-radius-control);
  background: rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.88);
  cursor: pointer;
  font-size: 12px;
  transition: border-color 180ms ease, background 180ms ease, color 180ms ease, transform 180ms ease;
}

[id].sfi-app-panel button:hover {
  border-color: rgba(191, 232, 251, 0.5);
  background: rgba(191, 232, 251, 0.1);
}

.sfi-app-shell button:focus-visible,
.sfi-app-shell input:focus-visible,
.sfi-app-shell summary:focus-visible {
  outline: 2px solid var(--sfi-blue);
  outline-offset: 3px;
}

[id].sfi-app-panel button[aria-pressed="true"],
[id].sfi-app-panel button[aria-selected="true"] {
  border-color: rgba(191, 232, 251, 0.72);
  background: rgba(191, 232, 251, 0.16);
  color: rgba(255, 255, 255, 0.96);
  box-shadow: 0 0 18px rgba(191, 232, 251, 0.08);
}

.sfi-math-readout {
  color: var(--sfi-readout);
  font-variant-numeric: tabular-nums;
}

.sfi-result-card {
  display: grid;
  gap: 3px;
  margin-top: 14px;
  padding: 10px 12px;
  border: 1px solid rgba(191, 232, 251, 0.13);
  border-radius: 13px;
  background: rgba(0, 0, 0, 0.3);
}

.sfi-result-label {
  color: rgba(255, 255, 255, 0.42);
  font-size: 8px;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.sfi-result-card .sfi-math-readout {
  overflow-wrap: anywhere;
  font-size: 13px;
  font-weight: 500;
  line-height: 1.4;
}

.sfi-result-detail {
  overflow: hidden;
  color: var(--sfi-blue-muted);
  font-size: 10px;
  line-height: 1.35;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.sfi-educational-note {
  color: var(--sfi-muted);
  font-size: 11px;
  line-height: 1.45;
}

/* Reusable panel controls shared by mathematical explorations. */
.sfi-segmented-control {
  display: grid;
  grid-template-columns: repeat(var(--sfi-segments, 2), minmax(0, 1fr));
  gap: 4px;
  margin: 10px 0;
  padding: 4px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--sfi-radius-control);
  background: rgba(0, 0, 0, 0.25);
  box-shadow: inset 0 1px 7px rgba(0, 0, 0, 0.28);
}

[id].sfi-app-panel .sfi-segmented-control button {
  min-height: 32px;
  padding: 5px 8px;
  border-color: transparent;
  font-size: 10px;
  letter-spacing: 0.055em;
}

.sfi-control-row {
  display: grid;
  grid-template-columns: var(--sfi-control-label-width, 78px) minmax(0, 1fr) var(--sfi-control-value-width, 48px);
  align-items: center;
  gap: 8px;
  margin: 9px 0;
  color: rgba(255, 255, 255, 0.7);
  font-size: 12px;
  letter-spacing: 0.02em;
}

.sfi-control-row > input[type="range"] {
  grid-column: 2;
  grid-row: 1;
  width: 100%;
  min-width: 0;
  margin: 0;
}

.sfi-control-row > output {
  grid-column: 3;
  grid-row: 1;
  overflow: hidden;
  text-align: right;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.sfi-button-grid {
  display: grid;
  grid-template-columns: repeat(var(--sfi-button-columns, 2), minmax(0, 1fr));
  gap: 6px;
  margin-top: 10px;
}

/* Circular τ-domain angle control, established by Hypercubes and reusable by
   explorations whose angles naturally wrap through a full turn. */
.sfi-angle-dial-wrap { display: grid; justify-items: center; }

[id].sfi-app-panel button.sfi-angle-dial {
  position: relative;
  width: 50px;
  min-height: 50px;
  padding: 0;
  border-color: rgba(191, 232, 251, 0.25);
  border-radius: 50%;
  background: radial-gradient(circle at 40% 34%, rgba(255, 255, 255, 0.1), rgba(255, 255, 255, 0.025) 58%, rgba(0, 0, 0, 0.26));
  touch-action: none;
}

.sfi-angle-dial::before {
  position: absolute;
  inset: 5px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  content: "";
}

.sfi-angle-dial-hand {
  position: absolute;
  z-index: 1;
  top: 50%;
  left: 50%;
  width: 38%;
  height: 1px;
  border-radius: 999px;
  background: var(--sfi-blue);
  box-shadow: 0 0 8px rgba(191, 232, 251, 0.45);
  transform-origin: left center;
}

.sfi-angle-dial-center {
  position: absolute;
  z-index: 3;
  top: calc(50% - 2px);
  left: calc(50% - 2px);
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: rgba(221, 247, 255, 0.95);
  box-shadow: 0 0 6px rgba(143, 218, 248, 0.5);
}

.sfi-angle-dial-label,
.sfi-angle-dial-value {
  position: absolute;
  z-index: 2;
  right: 0;
  left: 0;
  pointer-events: none;
  text-align: center;
}

.sfi-angle-dial-label { top: 7px; color: rgba(255, 255, 255, 0.9); font-size: 8px; font-weight: 600; letter-spacing: 0.05em; line-height: 1; }
.sfi-angle-dial-value { bottom: 6px; color: rgba(191, 232, 251, 0.62); font-family: Georgia, "Times New Roman", serif; font-size: 7px; line-height: 1; }

.sfi-mode-note {
  min-height: 14px;
  margin: -3px 2px 8px;
  color: var(--sfi-blue-muted);
  font-size: 8px;
  line-height: 1.35;
  text-align: center;
}

.sfi-panel-section {
  margin-top: 12px;
  padding-top: 11px;
  border-top: 1px solid rgba(255, 255, 255, 0.09);
}

/* Compact secondary mathematical views, shared by Hypercubes and Polar Graph. */
.sfi-floating-visual {
  padding: 7px;
  border: 1px solid rgba(191, 232, 251, 0.18);
  border-radius: 16px;
  background: rgba(4, 10, 16, 0.72);
  box-shadow: 0 15px 38px rgba(0, 0, 0, 0.34), inset 0 1px rgba(255, 255, 255, 0.035);
  -webkit-backdrop-filter: blur(13px);
  backdrop-filter: blur(13px);
  transition: width 180ms ease, inset 180ms ease, transform 180ms ease, background 180ms ease;
}

.sfi-floating-visual.is-expanded {
  z-index: 12;
  border-color: rgba(191, 232, 251, 0.3);
  background: #03080e;
  box-shadow: 0 28px 90px rgba(0, 0, 0, 0.58), inset 0 1px rgba(255, 255, 255, 0.05);
  -webkit-backdrop-filter: none;
  backdrop-filter: none;
}

.sfi-floating-visual-backdrop {
  position: fixed;
  z-index: 11;
  inset: 0;
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
  border: 0;
  border-radius: 0;
  background: rgba(0, 2, 6, 0.68);
  cursor: default;
  -webkit-backdrop-filter: blur(10px) saturate(105%);
  backdrop-filter: blur(10px) saturate(105%);
}

.sfi-floating-visual-backdrop[hidden] { display: none; }

.sfi-floating-visual-toggle {
  display: grid;
  width: 28px;
  min-height: 28px;
  padding: 0;
  place-items: center;
  border: 1px solid rgba(191, 232, 251, 0.23);
  border-radius: 50%;
  background: rgba(3, 8, 14, 0.78);
  color: rgba(235, 249, 255, 0.82);
  cursor: pointer;
  font-size: 13px;
  line-height: 1;
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}

.sfi-floating-visual-toggle:hover,
.sfi-floating-visual-toggle:focus-visible {
  border-color: rgba(191, 232, 251, 0.62);
  background: rgba(191, 232, 251, 0.14);
}

.sfi-floating-visual-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 10px;
  padding: 2px 2px 6px;
}

.sfi-floating-visual-kicker {
  display: block;
  color: rgba(191, 232, 251, 0.58);
  font-size: 7px;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.sfi-floating-visual-title {
  display: block;
  margin-top: 2px;
  color: rgba(245, 251, 255, 0.9);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 12px;
  font-weight: 400;
}

/* Global navigation for The Bhakti Math Guru APP. This remains separate from
   every exploration's mathematical panel and never changes viewport bounds. */
.sfi-exploration-nav {
  position: fixed;
  z-index: 40;
  inset: 0;
  pointer-events: none;
}

.sfi-exploration-trigger {
  position: absolute;
  top: var(--sfi-global-action-top);
  right: var(--sfi-global-action-right);
  display: inline-flex;
  min-height: 38px;
  align-items: center;
  gap: 8px;
  padding: 8px 13px;
  border: 1px solid rgba(191, 232, 251, 0.3);
  border-radius: var(--sfi-radius-control);
  background: linear-gradient(112deg, rgba(13, 18, 28, 0.82), rgba(8, 13, 21, 0.62));
  box-shadow: 0 12px 34px rgba(0, 0, 0, 0.3), inset 0 1px rgba(255, 255, 255, 0.04);
  color: rgba(255, 255, 255, 0.78);
  cursor: pointer;
  font-size: 9px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  backdrop-filter: blur(16px) saturate(115%);
  pointer-events: auto;
  transition: border-color 180ms ease, background 180ms ease, color 180ms ease, transform 180ms ease;
}

.sfi-exploration-trigger:hover,
.sfi-exploration-trigger[aria-expanded="true"] {
  border-color: rgba(191, 232, 251, 0.54);
  background: linear-gradient(112deg, rgba(24, 39, 52, 0.88), rgba(10, 20, 30, 0.7));
  color: #fff;
}

/* Global navigation owns the first corner row; app-specific viewport actions
   form a separate row beneath it instead of competing for the same space. */
.sfi-app-shell.has-exploration-navigation [data-sfi-viewport-actions] {
  top: var(--sfi-viewport-actions-top);
  right: var(--sfi-global-action-right);
}

.sfi-exploration-grid-icon {
  position: relative;
  display: block;
  width: 12px;
  height: 12px;
  flex: 0 0 auto;
}

.sfi-exploration-grid-icon::before {
  position: absolute;
  top: 1px;
  left: 1px;
  width: 4px;
  height: 4px;
  border-radius: 1px;
  background: rgba(191, 232, 251, 0.86);
  box-shadow:
    6px 0 rgba(191, 232, 251, 0.64),
    0 6px rgba(191, 232, 251, 0.64),
    6px 6px rgba(191, 232, 251, 0.86),
    0 0 8px rgba(191, 232, 251, 0.14);
  content: "";
}

.sfi-exploration-backdrop {
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 16px;
  background: rgba(0, 2, 6, 0.7);
  opacity: 0;
  pointer-events: auto;
  backdrop-filter: blur(12px) saturate(108%);
  transition: opacity 180ms ease;
}

.sfi-exploration-backdrop[hidden] { display: none; }
.sfi-exploration-nav.is-open .sfi-exploration-backdrop { opacity: 1; }

.sfi-exploration-switcher {
  display: grid;
  grid-template-rows: auto minmax(0, 1fr) auto;
  width: min(1240px, calc(100vw - 32px));
  max-height: min(820px, calc(100dvh - 32px));
  overflow: hidden;
  border: 1px solid rgba(191, 232, 251, 0.26);
  border-radius: 22px;
  outline: 0;
  background:
    radial-gradient(circle at 78% 12%, rgba(72, 153, 190, 0.12), transparent 35%),
    linear-gradient(128deg, rgba(14, 20, 31, 0.97), rgba(5, 9, 15, 0.94));
  box-shadow: 0 38px 120px rgba(0, 0, 0, 0.72), inset 0 1px rgba(255, 255, 255, 0.04);
  opacity: 0;
  transform: translateY(8px) scale(0.992);
  transition: opacity 180ms ease, transform 180ms ease;
}

.sfi-exploration-nav.is-open .sfi-exploration-switcher {
  opacity: 1;
  transform: none;
}

.sfi-exploration-switcher-header,
.sfi-exploration-switcher-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 17px 20px;
}

.sfi-exploration-switcher-header {
  border-bottom: 1px solid rgba(255, 255, 255, 0.09);
}

.sfi-exploration-switcher-kicker {
  display: block;
  margin-bottom: 5px;
  color: rgba(255, 255, 255, 0.4);
  font-size: 8px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.sfi-exploration-switcher h2 {
  margin: 0;
  color: rgba(255, 255, 255, 0.94);
  font-size: clamp(17px, 2vw, 24px);
  font-weight: 400;
  letter-spacing: 0.055em;
  text-transform: uppercase;
}

.sfi-exploration-close {
  position: relative;
  display: grid;
  width: 42px;
  height: 42px;
  flex: 0 0 auto;
  place-items: center;
  padding: 0;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 14px;
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.09), rgba(255, 255, 255, 0.025));
  box-shadow: inset 0 1px rgba(255, 255, 255, 0.06), 0 10px 28px rgba(0, 0, 0, 0.22);
  color: rgba(255, 255, 255, 0.72);
  cursor: pointer;
  transition: border-color 180ms ease, background 180ms ease, transform 180ms ease;
}

.sfi-exploration-close span,
.sfi-exploration-close span::after {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 15px;
  height: 1px;
  border-radius: 999px;
  background: currentColor;
  content: "";
  transform: translate(-50%, -50%) rotate(45deg);
}

.sfi-exploration-close span::after { transform: translate(-50%, -50%) rotate(90deg); }
.sfi-exploration-close:hover { border-color: rgba(191, 232, 251, 0.48); background: rgba(191, 232, 251, 0.11); color: #fff; }

.sfi-exploration-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 170px), 230px));
  grid-auto-rows: max-content;
  align-items: start;
  justify-content: center;
  align-content: start;
  gap: 14px 12px;
  min-height: 0;
  padding: clamp(10px, 1.5vw, 18px);
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-width: thin;
  scrollbar-color: rgba(191, 232, 251, 0.28) transparent;
}

.sfi-exploration-card {
  position: relative;
  display: grid;
  grid-template-rows: auto auto;
  width: 100%;
  min-height: 0;
  aspect-ratio: auto;
  align-self: start;
  min-width: 0;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.11);
  border-radius: 13px 13px 17px 17px;
  background: linear-gradient(155deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.025));
  box-shadow: 0 14px 30px rgba(0, 0, 0, 0.25), inset 0 1px rgba(255, 255, 255, 0.035);
  color: inherit;
  text-decoration: none;
  transition: border-color 180ms ease, background 180ms ease, transform 180ms ease;
}

.sfi-exploration-card:hover,
.sfi-exploration-card:focus-visible {
  border-color: rgba(191, 232, 251, 0.46);
  background: rgba(191, 232, 251, 0.065);
  transform: translateY(-2px);
}

.sfi-exploration-card.is-current {
  border-color: rgba(191, 232, 251, 0.5);
  box-shadow: inset 0 0 0 1px rgba(191, 232, 251, 0.08);
}

.sfi-exploration-card-copy {
  position: relative;
  display: grid;
  align-content: start;
  min-width: 0;
  gap: 2px;
  min-height: 0;
  padding: 7px 10px 8px;
  background:
    radial-gradient(circle at 14% 0%, rgba(95, 180, 218, 0.12), transparent 48%),
    radial-gradient(circle at 94% 120%, rgba(87, 111, 153, 0.1), transparent 58%),
    rgba(8, 15, 24, 0.98);
  box-shadow: inset 0 1px rgba(255, 255, 255, 0.035);
}

.sfi-exploration-card-copy strong {
  min-width: 0;
  color: rgba(247, 252, 255, 0.95);
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(13px, 1.15vw, 15px);
  font-weight: 400;
  letter-spacing: 0.025em;
  line-height: 1.16;
  overflow-wrap: anywhere;
}

.sfi-exploration-card-copy > span:not(.sfi-exploration-current) {
  min-width: 0;
  color: rgba(191, 232, 251, 0.62);
  font-size: clamp(7px, 0.64vw, 8px);
  letter-spacing: 0.075em;
  line-height: 1.25;
  overflow-wrap: anywhere;
  text-transform: uppercase;
}

.sfi-exploration-current,
.sfi-exploration-access {
  display: inline-flex;
  width: max-content;
  align-items: center;
  padding: 3px 6px;
  border: 1px solid rgba(191, 232, 251, 0.25);
  border-radius: 999px;
  color: rgba(191, 232, 251, 0.72);
  font-size: 7px;
  font-style: normal;
  letter-spacing: 0.1em;
  line-height: 1;
  text-transform: uppercase;
}

.sfi-exploration-current {
  margin-top: 3px;
}

.sfi-exploration-access,
.sfi-exploration-current {
  position: static;
}

.sfi-exploration-switcher-footer {
  justify-content: flex-end;
  border-top: 1px solid rgba(255, 255, 255, 0.09);
}

.sfi-exploration-switcher-footer a {
  color: rgba(255, 255, 255, 0.58);
  font-size: 9px;
  letter-spacing: 0.08em;
  text-decoration: none;
  text-transform: uppercase;
}

.sfi-exploration-switcher-footer a { color: var(--sfi-blue-muted); }
.sfi-exploration-switcher-footer a:hover { color: #fff; }

.sfi-exploration-preview {
  position: relative;
  display: grid;
  min-height: 220px;
  overflow: hidden;
  place-items: center;
  background:
    linear-gradient(rgba(191, 232, 251, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(191, 232, 251, 0.035) 1px, transparent 1px),
    radial-gradient(circle at 50% 45%, color-mix(in srgb, var(--sfi-preview-accent) 16%, transparent), transparent 48%),
    #03060a;
  background-size: 22px 22px, 22px 22px, auto, auto;
  isolation: isolate;
}

.sfi-exploration-preview.is-compact {
  width: 100%;
  height: auto;
  min-height: 0;
  aspect-ratio: 16 / 9;
  border-bottom: 1px solid rgba(191, 232, 251, 0.12);
  box-shadow: inset 0 -10px 24px rgba(0, 0, 0, 0.2);
}

.sfi-exploration-preview::before,
.sfi-exploration-preview::after {
  position: absolute;
  z-index: -1;
  width: 42%;
  aspect-ratio: 1;
  border: 1px solid color-mix(in srgb, var(--sfi-preview-accent) 30%, transparent);
  content: "";
  transform: rotate(28deg);
  animation: sfi-preview-orbit 11s linear infinite;
}

.sfi-exploration-preview::after {
  width: 25%;
  border-radius: 50%;
  opacity: 0.58;
  animation-direction: reverse;
  animation-duration: 8s;
}

.sfi-exploration-preview-symbol {
  color: color-mix(in srgb, var(--sfi-preview-accent) 84%, white);
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(34px, 7vw, 70px);
  font-weight: 300;
  line-height: 1;
  opacity: 0.65;
  text-shadow: 0 0 28px color-mix(in srgb, var(--sfi-preview-accent) 30%, transparent);
}

.sfi-exploration-preview.is-compact .sfi-exploration-preview-symbol { font-size: 38px; }

.sfi-exploration-preview-media {
  position: absolute;
  inset: 0;
  z-index: 2;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0;
  transition: opacity 260ms ease;
}

.sfi-exploration-preview.has-media .sfi-exploration-preview-media { opacity: 1; }
.sfi-exploration-preview.has-media .sfi-exploration-preview-symbol { opacity: 0; }

@keyframes sfi-preview-orbit {
  to { transform: rotate(388deg); }
}

.sfi-sr-only,
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

@media (max-width: 820px) {
  .sfi-app-shell {
    --sfi-global-action-top: var(--sfi-mobile-action-inset);
    --sfi-global-action-right: var(--sfi-mobile-action-inset);
    --sfi-global-action-row-gap: 6px;
  }

  :root {
    --sfi-panel-left: 10px;
    --sfi-panel-top: 10px;
  }

  .sfi-layout-side-panel > .sfi-app-viewport { inset-inline: 0; }

  .sfi-app-shell {
    --sfi-visual-center-x: var(--sfi-mobile-composition-x);
    --sfi-visual-center-y: var(--sfi-mobile-composition-y);
  }

  .sfi-app-shell.sfi-layout-mobile-overlay {
    --sfi-visual-center-y: var(--sfi-mobile-overlay-composition-y);
  }

  [id].sfi-app-panel.sfi-mobile-dock {
    top: auto;
    right: 10px;
    bottom: max(10px, env(safe-area-inset-bottom));
    left: 10px;
    width: auto;
    max-height: 48dvh;
    padding: var(--sfi-panel-padding-mobile);
  }

  .sfi-layout-stacked-mobile {
    display: grid;
    grid-template-rows: auto auto;
    min-height: 0;
    overflow: hidden;
  }

  .sfi-layout-stacked-mobile > .sfi-app-viewport {
    position: relative;
    inset: auto;
    width: 100%;
    height: auto;
  }

  .sfi-layout-mobile-overlay > .sfi-app-viewport { inset: 0; }

  [id].sfi-app-panel.sfi-mobile-stack {
    position: relative;
    inset: auto;
    width: auto;
    max-height: none;
    margin: 10px;
    padding: var(--sfi-panel-padding-mobile);
  }

  [id].sfi-app-panel.sfi-mobile-overlay {
    top: auto;
    right: 10px;
    bottom: max(10px, env(safe-area-inset-bottom));
    left: 10px;
    width: auto;
    max-height: 43dvh;
    padding: var(--sfi-panel-padding-mobile);
  }

  .sfi-app-title { font-size: 15px; }
  .sfi-app-subtitle { font-size: 9px; }
  .sfi-panel-header { margin-bottom: 10px; }
  .sfi-institution { margin-bottom: 6px; font-size: 7px; }
  .sfi-panel-footer { margin-top: 10px; padding-top: 8px; font-size: 7px; }
  .sfi-panel-footer small { font-size: 7px; }
  .sfi-result-card { margin-top: 8px; padding: 8px 10px; }
  .sfi-result-card .sfi-math-readout { font-size: 11px; }
  .sfi-control-row { margin: 7px 0; font-size: 11px; }
  .sfi-segmented-control { margin: 7px 0; }
  .sfi-button-grid { margin-top: 7px; }
  .sfi-panel-section { margin-top: 9px; padding-top: 8px; }
  [id].sfi-app-panel button { min-height: 42px; }

  .sfi-exploration-trigger {
    top: var(--sfi-global-action-top);
    right: var(--sfi-global-action-right);
    min-height: 38px;
  }

  .sfi-app-shell [data-sfi-viewport-actions] {
    position: absolute;
    z-index: 41;
    top: var(--sfi-global-action-top);
    right: var(--sfi-global-action-right);
    bottom: auto;
    display: flex;
    align-items: center;
    gap: 5px;
  }

  .sfi-app-shell.has-exploration-navigation [data-sfi-viewport-actions] {
    top: var(--sfi-viewport-actions-top);
    right: var(--sfi-global-action-right);
  }

  .sfi-exploration-switcher {
    width: calc(100vw - 20px);
    max-height: calc(100dvh - 20px);
    border-radius: 18px;
  }

  .sfi-exploration-switcher-header,
  .sfi-exploration-switcher-footer { padding: 13px 14px; }

  .sfi-exploration-current { position: static; margin-top: 3px; }
  .sfi-exploration-switcher-footer { align-items: flex-start; flex-direction: column; gap: 8px; }
}

@media (max-width: 520px) {
  .sfi-exploration-trigger > span:last-child { display: none; }
  .sfi-exploration-trigger { width: 38px; justify-content: center; padding: 0; }
  .sfi-exploration-preview.is-compact .sfi-exploration-preview-symbol { font-size: 28px; }
}

@media (prefers-reduced-motion: reduce) {
  .sfi-app-shell *,
  .sfi-app-shell *::before,
  .sfi-app-shell *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
  }

  .sfi-exploration-preview::before,
  .sfi-exploration-preview::after { animation: none !important; }
}

/* Canonical World shell. Unmigrated programs retain the compatibility layout
   above; migrated Worlds opt in with .sfi-world-shell. */
:root {
  --sfi-world-wide-min: 1120px;
  --sfi-world-compact-max: 640px;
  --sfi-world-panel-width: 374px;
  --sfi-stage-gap: 18px;
  --sfi-world-panel-intermediate-height: 43dvh;
  --sfi-world-panel-compact-height: 49dvh;
  --sfi-focus-frosting: blur(12px) saturate(108%);
  --sfi-safe-inset-top: env(safe-area-inset-top, 0px);
  --sfi-safe-inset-right: env(safe-area-inset-right, 0px);
  --sfi-safe-inset-bottom: env(safe-area-inset-bottom, 0px);
  --sfi-safe-inset-left: env(safe-area-inset-left, 0px);
}

.sfi-world-shell {
  --sfi-panel-width: var(--sfi-world-panel-width);
  --sfi-stage-left: 0px;
  --sfi-stage-top: 0px;
  --sfi-stage-right: 100vw;
  --sfi-stage-bottom: 100dvh;
  --sfi-stage-width: 100vw;
  --sfi-stage-height: 100dvh;
  --sfi-stage-center-x: 50vw;
  --sfi-stage-center-y: 50dvh;
  --sfi-floating-card-guidance-clearance: 0px;
  --sfi-floating-card-guidance-gap: 32px;
  --sfi-collapsed-bottom-safe-inset: clamp(20px, 2.5vh, 28px);
  --sfi-contextual-guidance-height: 0px;
}

[id].sfi-app-panel.sfi-world-panel {
  z-index: 20;
  max-height: calc(100dvh - var(--sfi-panel-top) - 22px);
}
.sfi-world-panel[hidden] { display: none !important; }

.sfi-world-identity {
  display: grid;
}

.sfi-world-identity-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.sfi-world-identity-copy { min-width: 0; flex: 1 1 auto; }

.sfi-world-app-masthead {
  display: flex;
  width: 100%;
  min-width: 0;
  align-items: baseline;
  gap: 7px;
  margin-bottom: 10px;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(191, 232, 251, 0.13);
  white-space: nowrap;
}
.sfi-world-app-masthead span {
  flex: 0 0 auto;
  color: rgba(191, 232, 251, 0.82);
  font-size: 7.7px;
  font-weight: 650;
  letter-spacing: 0.13em;
  line-height: 1.2;
  text-transform: uppercase;
}
.sfi-world-app-masthead i { width: 1px; height: 12px; flex: 0 0 1px; align-self: center; background: rgba(191, 232, 251, 0.26); }
.sfi-world-app-masthead small { color: rgba(229, 243, 250, 0.42); font-family: Georgia, "Times New Roman", serif; font-size: 7.8px; font-style: italic; letter-spacing: 0.035em; }

.sfi-world-panel-toggle { display: inline-flex; min-height: 32px !important; align-items: center; justify-content: center; }

.sfi-world-controls-restore {
  position: absolute;
  z-index: 42;
  left: calc(var(--sfi-stage-left) + clamp(16px, 2.5vw, 34px));
  bottom: calc(var(--sfi-stage-bottom-inset) + clamp(18px, 3vh, 34px));
  min-height: 38px;
  padding: 8px 14px;
  border: 1px solid rgba(191, 232, 251, 0.2);
  border-radius: var(--sfi-radius-control);
  background: linear-gradient(112deg, rgba(13, 23, 33, 0.66), rgba(6, 12, 19, 0.5));
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.28), inset 0 1px rgba(255, 255, 255, 0.04);
  color: rgba(239, 249, 253, 0.76);
  cursor: pointer;
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.025em;
  -webkit-backdrop-filter: blur(16px) saturate(112%);
  backdrop-filter: blur(16px) saturate(112%);
}
.sfi-world-controls-restore[hidden] { display: none !important; }
.sfi-world-controls-restore:hover { border-color: rgba(191, 232, 251, 0.52); color: #fff; }

.sfi-world-experience-controls { display: grid; }
.sfi-world-modes { min-width: 0; margin-bottom: 10px; }
.sfi-world-mode-selector { width: 100%; margin: 0; }
.sfi-world-mode-note { margin: 5px 2px 0; }
.sfi-world-mode-note[hidden] { display: none; }

.sfi-world-mode-progress {
  display: grid;
  width: 100%;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 9px;
  margin: 5px 0 1px;
}

.sfi-world-mode-progress[hidden] { display: none; }
.sfi-world-mode-progress progress { width: 100%; height: 2px; overflow: hidden; border: 0; border-radius: 999px; appearance: none; background: rgba(191, 232, 251, 0.12); }
.sfi-world-mode-progress progress::-webkit-progress-bar { border-radius: 999px; background: rgba(191, 232, 251, 0.12); }
.sfi-world-mode-progress progress::-webkit-progress-value { border-radius: 999px; background: linear-gradient(90deg, rgba(130, 205, 238, 0.62), rgba(205, 243, 255, 0.92)); box-shadow: 0 0 9px rgba(143, 218, 248, 0.35); }
.sfi-world-mode-progress progress::-moz-progress-bar { border-radius: 999px; background: linear-gradient(90deg, rgba(130, 205, 238, 0.62), rgba(205, 243, 255, 0.92)); box-shadow: 0 0 9px rgba(143, 218, 248, 0.35); }
.sfi-world-mode-progress output { color: rgba(191, 232, 251, 0.58); font-size: 7px; letter-spacing: 0.055em; white-space: nowrap; }

.sfi-world-rotation {
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr);
  align-items: center;
  gap: 8px;
  width: 100%;
  margin: 0 0 11px;
  padding-bottom: 11px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.09);
}

.sfi-world-control-label {
  color: rgba(255, 255, 255, 0.48);
  font-size: 8px;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

.sfi-world-rotation-selector { width: 100%; min-width: 0; margin: 0; padding: 3px; }
[id].sfi-app-panel .sfi-world-rotation-selector button { min-width: 0; min-height: 30px; padding-inline: clamp(4px, 1vw, 8px); font-size: clamp(7.5px, .68vw, 8.5px); }
.sfi-world-rotation[data-disabled] { opacity: 0.48; }

.sfi-world-panel-columns { display: grid; gap: 0; }
.sfi-world-panel-column { min-width: 0; }

.sfi-control-grid { display: grid; gap: 4px; }
.sfi-control-grid[data-sfi-control-count="2"] { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.sfi-control-grid[data-sfi-control-count="3"] { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.sfi-control-grid[data-sfi-control-count="4"] { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.sfi-world-global-controls {
  position: absolute;
  z-index: 42;
  top: var(--sfi-global-action-top);
  right: var(--sfi-global-action-right);
  display: flex;
  align-items: center;
  gap: 7px;
}

.sfi-world-global-controls button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: var(--sfi-global-action-height);
  padding: 8px 12px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--sfi-radius-control);
  background: linear-gradient(112deg, rgba(13, 18, 28, 0.82), rgba(8, 13, 21, 0.62));
  box-shadow: 0 12px 34px rgba(0, 0, 0, 0.28), inset 0 1px rgba(255, 255, 255, 0.04);
  color: rgba(255, 255, 255, 0.82);
  cursor: pointer;
  font-size: 9px;
  font-weight: 500;
  letter-spacing: 0.075em;
  text-transform: uppercase;
  -webkit-backdrop-filter: blur(16px) saturate(115%);
  backdrop-filter: blur(16px) saturate(115%);
  transition: border-color 180ms ease, background 180ms ease, color 180ms ease;
}

.sfi-world-global-controls button > span { pointer-events: none; }
.sfi-world-global-controls .sfi-world-global-primary {
  gap: 9px;
  padding-inline: 15px;
  border-color: rgba(191, 232, 251, 0.5);
  background: linear-gradient(112deg, rgba(25, 47, 64, 0.92), rgba(9, 24, 36, 0.76));
  box-shadow:
    0 14px 38px rgba(0, 0, 0, 0.34),
    0 0 26px rgba(128, 205, 238, 0.085),
    inset 0 1px rgba(235, 250, 255, 0.1),
    inset 0 0 0 1px rgba(191, 232, 251, 0.035);
  color: rgba(245, 252, 255, 0.94);
  font-weight: 600;
}

.sfi-world-global-controls .sfi-world-global-primary .sfi-exploration-grid-icon {
  width: 13px;
  height: 13px;
  filter: drop-shadow(0 0 5px rgba(143, 218, 248, 0.22));
}

.sfi-world-global-controls .sfi-world-global-primary .sfi-exploration-grid-icon::before {
  background: rgba(220, 246, 255, 0.96);
  box-shadow:
    6px 0 rgba(191, 232, 251, 0.76),
    0 6px rgba(191, 232, 251, 0.76),
    6px 6px rgba(220, 246, 255, 0.96),
    0 0 9px rgba(143, 218, 248, 0.22);
}

.sfi-world-global-controls .sfi-world-global-utility {
  gap: 6px;
  border-color: rgba(255, 255, 255, 0.12);
  background: linear-gradient(112deg, rgba(10, 15, 23, 0.64), rgba(6, 10, 17, 0.42));
  box-shadow: 0 9px 26px rgba(0, 0, 0, 0.24), inset 0 1px rgba(255, 255, 255, 0.025);
  color: rgba(255, 255, 255, 0.63);
}
.sfi-world-reset-icon { color: rgba(191, 232, 251, 0.52); font-size: 14px; font-weight: 300; line-height: 1; }
.sfi-world-fullscreen-icon { position: relative; display: block; width: 12px; height: 12px; border: 1px solid rgba(191, 232, 251, 0.46); border-radius: 2px; clip-path: polygon(0 0, 42% 0, 42% 12%, 12% 12%, 12% 42%, 0 42%, 0 0, 100% 0, 100% 42%, 88% 42%, 88% 12%, 58% 12%, 58% 0, 100% 0, 100% 100%, 58% 100%, 58% 88%, 88% 88%, 88% 58%, 100% 58%, 100% 100%, 0 100%, 0 58%, 12% 58%, 12% 88%, 42% 88%, 42% 100%, 0 100%); }

.sfi-world-global-controls button:hover,
.sfi-world-global-controls button[aria-expanded="true"],
.sfi-world-global-controls button[aria-pressed="true"] {
  border-color: rgba(191, 232, 251, 0.54);
  background: linear-gradient(112deg, rgba(24, 39, 52, 0.88), rgba(10, 20, 30, 0.7));
  color: #fff;
}

.sfi-world-global-controls .sfi-world-global-primary:hover,
.sfi-world-global-controls .sfi-world-global-primary[aria-expanded="true"] {
  border-color: rgba(205, 241, 255, 0.68);
  background: linear-gradient(112deg, rgba(31, 57, 76, 0.95), rgba(11, 29, 43, 0.8));
}

.sfi-world-shell.has-exploration-switcher-open .sfi-world-global-controls { z-index: 39; }

.sfi-world-stage-status {
  position: absolute;
  z-index: 8;
  top: var(--sfi-global-action-top);
  left: calc(var(--sfi-stage-left) + clamp(14px, 2vw, 26px));
  display: grid;
  min-height: var(--sfi-global-action-height);
  max-width: min(430px, calc(var(--sfi-stage-width) - 330px));
  align-content: center;
  justify-items: start;
  pointer-events: none;
  text-align: left;
}

.sfi-world-stage-status > span {
  color: var(--sfi-blue-muted);
  font-size: 8px;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.sfi-world-stage-status > strong {
  margin-top: 2px;
  color: rgba(255, 255, 255, 0.94);
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(14px, 1.4vw, 20px);
  font-weight: 400;
  letter-spacing: 0.025em;
}

.sfi-world-stage-status > small {
  margin-top: 4px;
  color: rgba(255, 255, 255, 0.4);
  font-size: 9px;
}

.sfi-world-contextual-guidance {
  position: absolute;
  z-index: 8;
  right: calc(var(--sfi-stage-right-inset) + 22px);
  bottom: calc(var(--sfi-stage-bottom-inset) + 22px);
  display: grid;
  max-width: min(340px, calc(var(--sfi-stage-width) - 40px));
  justify-items: end;
  pointer-events: none;
  text-align: right;
  transition: opacity 180ms ease, transform 180ms ease;
}

.sfi-world-contextual-guidance > span {
  color: rgba(143, 218, 248, 0.78);
  font-size: 8px;
  font-weight: 600;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  text-shadow: 0 2px 14px rgba(0, 0, 0, 0.72);
}

.sfi-world-contextual-guidance > strong {
  margin-top: 4px;
  color: rgba(245, 251, 255, 0.96);
  font-family: Georgia, "Times New Roman", serif;
  font-size: clamp(22px, 2.6vw, 38px);
  font-weight: 400;
  letter-spacing: 0.015em;
  text-shadow: 0 2px 18px rgba(0, 0, 0, 0.6);
}

.sfi-world-contextual-guidance > small {
  margin-top: 6px;
  color: rgba(229, 243, 250, 0.58);
  font-size: 10px;
  font-weight: 400;
  letter-spacing: 0.06em;
  line-height: 1.55;
  white-space: pre-line;
  text-shadow: 0 2px 14px rgba(0, 0, 0, 0.72);
}

.sfi-world-colophon {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  align-items: stretch;
  gap: 0;
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px solid rgba(255, 255, 255, 0.09);
}

.sfi-world-colophon-creator { display: grid; min-width: 0; align-content: center; justify-items: start; gap: 2px; padding-right: 12px; text-align: left; }
.sfi-world-colophon-creator span { color: rgba(255, 255, 255, 0.38); font-size: 7px; letter-spacing: 0.06em; }
.sfi-world-colophon-creator strong { color: rgba(238, 248, 252, 0.72); font-family: Georgia, "Times New Roman", serif; font-size: 10px; font-weight: 400; letter-spacing: 0.025em; }
.sfi-world-colophon-center {
  display: grid;
  min-width: 0;
  align-content: center;
  justify-items: center;
  padding-inline: 12px;
  border-left: 1px solid rgba(191, 232, 251, 0.13);
  text-align: center;
}
.sfi-world-colophon-philosophy { color: rgba(191, 232, 251, 0.74); font-family: Georgia, "Times New Roman", serif; font-size: 10.5px; font-style: italic; font-weight: 400; letter-spacing: 0.02em; line-height: 1.25; }
.sfi-world-colophon-institution { display: grid; min-width: 0; align-content: center; justify-items: end; gap: 2px; padding-left: 12px; border-left: 1px solid rgba(191, 232, 251, 0.13); text-align: right; }
.sfi-world-colophon-institution span { color: rgba(255, 255, 255, 0.36); font-size: 7px; letter-spacing: 0.035em; line-height: 1.3; }
.sfi-world-colophon-institution a { color: rgba(191, 232, 251, 0.55); font-size: 7.5px; text-decoration: none; }
.sfi-world-colophon-institution a:hover { color: rgba(235, 249, 255, 0.9); }
.sfi-world-colophon-copyright { color: rgba(255, 255, 255, 0.25); font-size: 7px; letter-spacing: 0.08em; white-space: nowrap; }

.sfi-world-overlay-host {
  position: absolute;
  z-index: 55;
  inset: 0;
  pointer-events: none;
}

.sfi-floating-card {
  position: absolute;
  right: calc(var(--sfi-stage-right-inset) + clamp(16px, 2.5vw, 34px));
  bottom: calc(var(--sfi-stage-bottom-inset) + var(--sfi-contextual-guidance-height) + var(--sfi-floating-card-guidance-gap));
  width: clamp(164px, 15.5vw, 220px);
  padding: 8px;
  border: 1px solid rgba(191, 232, 251, 0.22);
  border-radius: 17px;
  background: linear-gradient(145deg, rgba(7, 16, 25, 0.76), rgba(2, 7, 12, 0.62));
  box-shadow: 0 18px 44px rgba(0, 0, 0, 0.38), inset 0 1px rgba(255, 255, 255, 0.05);
  -webkit-backdrop-filter: blur(15px) saturate(110%);
  backdrop-filter: blur(15px) saturate(110%);
  transition: opacity 180ms ease, transform 180ms ease, border-color 180ms ease, background 180ms ease;
}

.sfi-floating-card > .sfi-floating-visual-toggle { top: 8px; right: 8px; }
.sfi-world-shell .sfi-focus-modal > .sfi-floating-visual-toggle { top: 12px; right: 12px; width: 34px; min-height: 34px; }

.sfi-focus-modal-backdrop {
  position: absolute;
  z-index: 58;
  inset: 0;
  border: 0;
  background: radial-gradient(circle at var(--sfi-stage-center-x) var(--sfi-stage-center-y), rgba(9, 19, 29, 0.3), rgba(0, 2, 6, 0.76));
  opacity: 0;
  -webkit-backdrop-filter: var(--sfi-focus-frosting);
  backdrop-filter: var(--sfi-focus-frosting);
  transition: opacity 180ms ease;
}

.sfi-focus-modal-backdrop[hidden] { display: none; }
.sfi-focus-modal-backdrop.is-visible { opacity: 1; }

.sfi-world-shell .sfi-focus-modal {
  position: absolute;
  z-index: 60;
  top: var(--sfi-stage-center-y);
  right: auto;
  bottom: auto;
  left: var(--sfi-stage-center-x);
  width: min(calc(var(--sfi-stage-width) * 0.84), calc(var(--sfi-stage-height) * 0.84), 760px);
  max-width: calc(100vw - 28px);
  max-height: calc(100dvh - 28px);
  padding: 14px;
  border-color: rgba(191, 232, 251, 0.36);
  border-radius: 24px;
  outline: 0;
  background: linear-gradient(145deg, rgba(7, 15, 24, 0.98), rgba(2, 7, 12, 0.98));
  box-shadow: 0 34px 110px rgba(0, 0, 0, 0.68), 0 0 70px rgba(101, 181, 218, 0.07), inset 0 1px rgba(255, 255, 255, 0.06);
  transform: translate(-50%, -50%);
  -webkit-backdrop-filter: none;
  backdrop-filter: none;
}

@media (min-width: 641px) and (max-width: 1119px) {
  .sfi-world-shell {
    --sfi-global-action-top: 12px;
    --sfi-global-action-right: 12px;
    --sfi-floating-card-guidance-gap: 10px;
  }

  [id].sfi-app-panel.sfi-world-panel {
    top: auto;
    right: 16px;
    bottom: max(16px, env(safe-area-inset-bottom));
    left: 16px;
    width: auto;
    max-height: var(--sfi-world-panel-intermediate-height);
    padding: 14px 16px;
  }

  .sfi-world-panel-columns {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 18px;
  }

  .sfi-world-experience-controls { grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr); align-items: start; gap: 18px; }
  .sfi-world-modes { width: 100%; }
  .sfi-world-rotation { width: 100%; }

  .sfi-world-panel-column + .sfi-world-panel-column {
    padding-left: 18px;
    border-left: 1px solid rgba(255, 255, 255, 0.09);
  }

  .sfi-world-panel-toggle { display: inline-flex; min-height: 36px !important; align-items: center; justify-content: center; }
  .sfi-world-stage-status {
    top: var(--sfi-global-action-top);
    left: calc(var(--sfi-stage-left) + 16px);
    max-width: calc(var(--sfi-stage-width) - 300px);
  }
  .sfi-world-contextual-guidance {
    right: calc(var(--sfi-stage-right-inset) + 18px);
    bottom: var(--sfi-stage-bottom-inset);
  }
  .sfi-floating-card {
    right: calc(var(--sfi-stage-right-inset) + 18px);
    bottom: calc(var(--sfi-stage-bottom-inset) + var(--sfi-contextual-guidance-height) + var(--sfi-floating-card-guidance-gap));
    width: clamp(158px, 21vw, 194px);
  }
  .sfi-world-colophon { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (max-width: 640px) {
  .sfi-world-shell {
    --sfi-global-action-top: var(--sfi-mobile-action-inset);
    --sfi-global-action-right: var(--sfi-mobile-action-inset);
    --sfi-floating-card-guidance-gap: 9px;
  }

  [id].sfi-app-panel.sfi-world-panel {
    top: auto;
    right: 10px;
    bottom: max(10px, env(safe-area-inset-bottom));
    left: 10px;
    width: auto;
    max-height: var(--sfi-world-panel-compact-height);
    padding: var(--sfi-panel-padding-mobile);
  }

  .sfi-world-panel-columns { grid-template-columns: minmax(0, 1fr); }
  .sfi-world-panel-toggle { display: inline-flex; min-height: 36px !important; align-items: center; justify-content: center; }

  .sfi-world-global-controls { gap: 4px; }
  .sfi-world-global-controls button { min-height: 36px; padding: 6px 8px; font-size: 7px; }
  .sfi-world-global-controls .sfi-world-global-primary { gap: 7px; padding-inline: 10px; }
  .sfi-world-global-controls .sfi-world-global-primary .sfi-exploration-grid-icon { width: 12px; height: 12px; }
  .sfi-world-modes { width: 100%; }
  .sfi-world-experience-controls { grid-template-columns: minmax(0, 1fr); }
  .sfi-world-rotation { grid-template-columns: 52px minmax(0, 1fr); width: 100%; gap: 6px; }
  [id].sfi-app-panel .sfi-world-rotation-selector button { min-width: 44px; padding-inline: 4px; font-size: 7.5px; }
  .sfi-world-stage-status {
    top: var(--sfi-global-action-top);
    left: calc(var(--sfi-stage-left) + 10px);
    max-width: calc(var(--sfi-stage-width) - 240px);
  }
  .sfi-world-stage-status > strong { font-size: 14px; }
  .sfi-world-contextual-guidance {
    right: calc(var(--sfi-stage-right-inset) + 12px);
    bottom: var(--sfi-stage-bottom-inset);
  }
  .sfi-world-contextual-guidance > strong { font-size: 23px; }
  .sfi-floating-card { right: calc(var(--sfi-stage-right-inset) + 10px); bottom: calc(var(--sfi-stage-bottom-inset) + var(--sfi-contextual-guidance-height) + var(--sfi-floating-card-guidance-gap)); width: min(38vw, 154px); padding: 6px; border-radius: 14px; }
  .sfi-world-controls-restore { left: calc(var(--sfi-stage-left) + 10px); bottom: calc(var(--sfi-stage-bottom-inset) + 12px); min-height: 36px; padding: 7px 12px; }
  .is-world-panel-collapsed .sfi-world-contextual-guidance { max-width: min(240px, calc(var(--sfi-stage-width) - 130px)); }
  .sfi-world-colophon { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .sfi-world-colophon-center { padding-inline: 8px; }
  .sfi-world-colophon-institution { padding-left: 8px; }
  .sfi-world-shell .sfi-focus-modal { width: min(calc(var(--sfi-stage-width) * 0.9), calc(var(--sfi-stage-height) * 0.88), 560px); padding: 9px; border-radius: 18px; }
}

/* A collapsed panel releases its stage geometry, while the lower-stage
   composition retains a canonical visual safe area above the viewport edge. */
.is-world-panel-collapsed .sfi-world-contextual-guidance {
  bottom: calc(var(--sfi-stage-bottom-inset) + var(--sfi-collapsed-bottom-safe-inset));
}

.is-world-panel-collapsed .sfi-floating-card {
  bottom: calc(var(--sfi-stage-bottom-inset) + var(--sfi-collapsed-bottom-safe-inset) + var(--sfi-contextual-guidance-height) + var(--sfi-floating-card-guidance-gap));
}

@media (max-width: 360px) {
  .sfi-control-grid[data-sfi-control-count="4"] { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}