:root {
  --paper: #f2f1ed;
  --surface: #ffffff;
  --surface-alt: #e9e8e3;
  --ink: #202624;
  --muted: #626967;
  --accent: #2f4a40;
  --accent-dark: #243a32;
  --line: #c9ccc8;
  --line-strong: #999f9b;
  --focus: #8b6f35;
  --forest: var(--accent);
}

* {
  box-sizing: border-box;
}

html {
  background: var(--paper);
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Georgia, "Times New Roman", serif;
  line-height: 1.55;
}

header {
  padding: 2rem max(1rem, calc((100% - 1460px) / 2));
  color: var(--surface);
  background: var(--accent-dark);
  border-bottom: 1px solid var(--line-strong);
}

header h1 {
  margin: 0 0 .4rem;
  font-size: clamp(1.65rem, 3vw, 2.55rem);
  font-weight: 700;
}

header p {
  margin: 0;
  max-width: 76rem;
  color: #dce1de;
}

nav {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  gap: .3rem;
  flex-wrap: wrap;
  padding: .6rem max(1rem, calc((100% - 1460px) / 2));
  background: rgba(242, 241, 237, .97);
  border-bottom: 1px solid var(--line);
}

nav a,
.main-nav a,
.nav-dropdown summary {
  color: var(--accent-dark);
  text-decoration: none;
  padding: .42rem .62rem;
  border: 1px solid transparent;
  border-radius: 2px;
  font-size: .91rem;
  font-weight: 700;
}

nav a:hover,
nav a[aria-current="page"],
.nav-dropdown[open] summary,
.nav-dropdown summary:hover,
.nav-dropdown summary:focus-visible {
  color: var(--surface);
  background: var(--accent);
  border-color: var(--accent);
}

main {
  width: min(1500px, calc(100% - 2rem));
  margin: 1.35rem auto 3rem;
}

.card {
  margin: 0 0 1.2rem;
  padding: clamp(1rem, 2vw, 1.45rem);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 2px;
  box-shadow: none;
}

.card h2,
.card h3 {
  color: var(--accent-dark);
}

.card h2 {
  margin-top: 0;
}

.intro {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(260px, .85fr);
  gap: 1.4rem;
}

.note {
  margin-top: 1rem;
  padding: .8rem .9rem;
  background: var(--surface-alt);
  border-left: 3px solid var(--line-strong);
  border-radius: 0;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(245px, 1fr));
  gap: .9rem;
}

.link-card {
  display: block;
  min-height: 150px;
  padding: 1rem;
  color: inherit;
  text-decoration: none;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 2px;
  transition: background .15s ease, border-color .15s ease;
}

.link-card:hover {
  background: var(--surface-alt);
  border-color: var(--line-strong);
}

.link-card strong {
  display: block;
  color: var(--accent-dark);
  font-size: 1.14rem;
  margin: .25rem 0;
}

.small {
  color: var(--muted);
  font-size: .82rem;
  font-weight: 700;
}

.legend {
  display: grid;
  gap: .48rem;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: .65rem;
  font-size: .9rem;
}

.legend-line {
  display: inline-block;
  width: 44px;
  border-top: 3px solid;
}

.controls {
  display: flex;
  flex-wrap: wrap;
  gap: .45rem;
  margin: .7rem 0 1.1rem;
}

.controls button {
  appearance: none;
  padding: .56rem .76rem;
  color: var(--accent-dark);
  background: var(--surface-alt);
  border: 1px solid var(--line);
  border-radius: 2px;
  font: inherit;
  font-size: .85rem;
  font-weight: 700;
  cursor: pointer;
}

.controls button:hover {
  background: #deded8;
  border-color: var(--line-strong);
}

.controls button.active {
  color: var(--surface);
  background: var(--accent);
  border-color: var(--accent);
}

.graph-wrap {
  width: 100%;
  overflow: visible;
}

.graph-wrap svg {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
}

.graph-wrap svg path.edge,
.graph-wrap svg .edge {
  fill: none !important;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.node,
.edge {
  transition: opacity .16s ease;
}

.node:hover {
  filter: none;
}

.is-filtered {
  opacity: .055 !important;
  pointer-events: none !important;
}

.is-related-dim {
  opacity: .12 !important;
}

table {
  width: 100%;
  border-collapse: collapse;
  background: var(--surface);
  font-size: .93rem;
}

th,
td {
  padding: .78rem .82rem;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--line);
}

th {
  color: var(--surface);
  background: var(--accent-dark);
}

tbody tr:nth-child(even) {
  background: #f7f6f2;
}

tbody tr:hover {
  background: var(--surface-alt);
}

.tag {
  display: inline-block;
  padding: .22rem .46rem;
  border: 1px solid var(--line-strong);
  border-radius: 2px;
  font-size: .76rem;
  font-weight: 700;
}

.source-list {
  display: grid;
  gap: .7rem;
}

.source-item {
  padding: .8rem;
  background: var(--surface-alt);
  border: 1px solid var(--line);
  border-radius: 2px;
}

.source-item a {
  color: var(--accent-dark);
  overflow-wrap: anywhere;
}

.meta-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: .8rem;
}

.meta-box {
  padding: .85rem;
  background: var(--surface-alt);
  border: 1px solid var(--line);
  border-radius: 2px;
}

.meta-box strong {
  color: var(--accent-dark);
}

code,
pre {
  font-family: Consolas, "Courier New", monospace;
}

pre {
  padding: 1rem;
  overflow-x: auto;
  background: var(--surface-alt);
  border: 1px solid var(--line);
  border-radius: 2px;
}

.main-nav {
  align-items: center;
}

.nav-dropdown {
  position: relative;
}

.nav-dropdown summary {
  display: block;
  cursor: pointer;
  list-style: none;
}

.nav-dropdown summary::-webkit-details-marker {
  display: none;
}

.nav-dropdown summary::after {
  content: "▾";
  margin-left: .35rem;
  font-size: .76rem;
}

.nav-dropdown-menu {
  position: absolute;
  left: 0;
  top: calc(100% + .35rem);
  z-index: 30;
  display: grid;
  gap: .2rem;
  min-width: min(86vw, 22rem);
  padding: .4rem;
  background: var(--surface);
  border: 1px solid var(--line-strong);
  border-radius: 2px;
  box-shadow: none;
}

.nav-dropdown-menu a {
  display: block;
  border-radius: 2px;
  white-space: normal;
}

.breadcrumb {
  position: static;
  display: flex;
  gap: .45rem;
  align-items: center;
  margin: 0 0 1rem;
  padding: 0;
  background: transparent;
  border: 0;
  box-shadow: none;
  backdrop-filter: none;
}

.breadcrumb a {
  padding: 0;
  color: var(--accent-dark);
  border-radius: 0;
}

.breadcrumb a:hover {
  color: var(--accent);
  background: transparent;
  text-decoration: underline;
}

.breadcrumb span {
  color: var(--muted);
  font-size: .91rem;
  font-weight: 700;
}

.breadcrumb a::after {
  content: none;
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .25rem .45rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.breadcrumb li {
  display: flex;
  align-items: center;
  color: var(--muted);
  font-size: .91rem;
  font-weight: 700;
}

.breadcrumb li + li::before {
  content: ">";
  margin-right: .45rem;
  color: var(--line-strong);
  font-weight: 400;
}

.breadcrumb li[aria-current="page"] {
  color: var(--ink);
}

.period-card strong {
  font-size: 1.24rem;
}

.period-card p {
  margin: .4rem 0 0;
}

.period-grid {
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.period-hero {
  align-items: start;
}

.unavailable-card {
  color: var(--muted);
  background: var(--surface-alt);
  border-style: dashed;
}

.unavailable-card strong {
  color: var(--muted);
}

a:focus-visible,
button:focus-visible,
summary:focus-visible,
.breadcrumb a:focus-visible,
.back-link:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
}

.index-list {
  display: grid;
  gap: .5rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.index-list-item {
  margin: 0;
}

.index-list-item a,
.index-list-static {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 1rem;
  width: 100%;
  padding: .88rem 1rem;
  color: inherit;
  text-decoration: none;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 2px;
  transition: background .15s ease, border-color .15s ease;
}

.index-list-item a:hover {
  background: var(--surface-alt);
  border-color: var(--line-strong);
}

.index-list-item a:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
}

.index-code {
  display: inline-grid;
  place-items: center;
  min-width: 3.2rem;
  padding: .28rem .44rem;
  color: var(--surface);
  background: var(--accent);
  border-radius: 2px;
  font-size: .82rem;
  font-weight: 700;
  letter-spacing: 0;
}

.index-content {
  display: grid;
  gap: .16rem;
  min-width: 0;
}

.index-content strong {
  color: var(--accent-dark);
  font-size: 1.06rem;
}

.index-content span {
  color: var(--muted);
  font-size: .94rem;
}

.index-arrow {
  color: var(--accent);
  font-size: 1.18rem;
  font-weight: 700;
}

.index-list-item-unavailable .index-list-static {
  color: var(--muted);
  background: var(--surface-alt);
  border-style: dashed;
}

.index-list-item-unavailable .index-code {
  color: var(--muted);
  background: #ddddd7;
}

.index-list-item-unavailable strong {
  color: var(--muted);
}

.period-list .index-content strong {
  font-size: 1.14rem;
}

.area-list .index-code {
  min-width: 2.45rem;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  margin: 0 0 1rem;
  padding: .48rem .72rem;
  color: var(--accent-dark);
  background: var(--surface-alt);
  border: 1px solid var(--line);
  border-radius: 2px;
  text-decoration: none;
  font-size: .91rem;
  font-weight: 700;
}

.back-link:hover {
  color: var(--surface);
  background: var(--accent);
  border-color: var(--accent);
}

@media (max-width: 820px) {
  .intro {
    grid-template-columns: 1fr;
  }

  main {
    width: min(100% - 1rem, 1500px);
  }

  nav {
    position: static;
  }

  th,
  td {
    padding: .55rem;
  }

  .main-nav {
    align-items: stretch;
  }

  .nav-dropdown {
    width: 100%;
  }

  .nav-dropdown summary {
    display: inline-block;
  }

  .nav-dropdown-menu {
    position: static;
    width: 100%;
    margin-top: .45rem;
  }

  .breadcrumb,
  .breadcrumb ol {
    flex-wrap: wrap;
  }

  .period-card strong {
    font-size: 1.13rem;
  }

  .index-list-item a,
  .index-list-static {
    grid-template-columns: 1fr auto;
    gap: .65rem;
  }

  .index-code {
    grid-column: 1 / -1;
    justify-self: start;
  }

  .index-content strong,
  .period-list .index-content strong {
    font-size: 1.02rem;
  }

  .back-link {
    width: 100%;
    justify-content: center;
  }
}

@media print {
  nav,
  .controls {
    display: none !important;
  }

  body,
  html {
    background: #fff;
  }

  .card {
    box-shadow: none;
    break-inside: avoid;
  }
}

.graph-wrap.graph-viewport {
  position: relative;
  min-height: 420px;
  overflow: hidden;
  border: 1px solid var(--line);
  background-color: var(--surface);
  background-image: radial-gradient(circle, rgba(47, 74, 64, .22) 1px, transparent 1.2px);
  background-position: var(--graph-grid-x, 0) var(--graph-grid-y, 0);
  background-size: var(--graph-grid-size, 24px) var(--graph-grid-size, 24px);
  cursor: zoom-in;
  touch-action: pan-y;
  user-select: none;
}

.graph-wrap.graph-viewport::after {
  content: "sinistro: sposta elementi \00B7 destro: pan \00B7 rotella: zoom";
  position: absolute;
  right: .65rem;
  bottom: .45rem;
  z-index: 2;
  padding: .18rem .4rem;
  color: var(--muted);
  background: rgba(255, 255, 255, .84);
  border: 1px solid var(--line);
  font-size: .72rem;
  pointer-events: none;
}

.graph-wrap.graph-viewport.is-active {
  border-color: var(--line-strong);
}

.graph-wrap.graph-viewport.is-panning {
  cursor: grabbing;
}

.graph-wrap.graph-viewport svg {
  min-width: 100%;
  min-height: 420px;
}

.graph-wrap.graph-viewport .graph-panzoom-layer {
  transform-origin: 0 0;
}

.graph-wrap.graph-static-timeline {
  overflow: auto;
  background: var(--surface);
}

.graph-wrap svg .edge {
  stroke-width: 1.7 !important;
  vector-effect: non-scaling-stroke;
}

.graph-wrap svg .node rect,
.graph-wrap svg .node circle {
  stroke-width: 1.45 !important;
  filter: none !important;
}

.graph-wrap svg .is-draggable-node {
  cursor: grab;
  touch-action: none;
}

.graph-editor-toolbar {
  position: sticky;
  top: 0;
  z-index: 5;
  display: flex;
  flex-wrap: wrap;
  gap: .28rem;
  align-items: center;
  width: 100%;
  padding: .35rem;
  background: rgba(255, 255, 255, .94);
  border-bottom: 1px solid var(--line);
}

.graph-editor-toolbar button,
.graph-editor-panel button,
.graph-editor-menu summary {
  appearance: none;
  padding: .32rem .46rem;
  color: var(--accent-dark);
  background: var(--surface-alt);
  border: 1px solid var(--line);
  border-radius: 2px;
  font: inherit;
  font-size: .74rem;
  font-weight: 700;
  cursor: pointer;
}

.graph-editor-toolbar button:hover,
.graph-editor-panel button:hover,
.graph-editor-toolbar button.active,
.graph-editor-menu[open] summary,
.graph-editor-menu summary:hover {
  color: var(--surface);
  background: var(--accent);
  border-color: var(--accent);
}

.graph-editor-toolbar button:disabled,
.graph-editor-toolbar button:disabled:hover,
.graph-editor-menu.is-disabled summary,
.graph-editor-menu.is-disabled summary:hover {
  color: var(--muted);
  background: #f1f0eb;
  border-color: var(--line);
  cursor: not-allowed;
  opacity: .62;
}

.graph-editor-menu.is-disabled {
  pointer-events: none;
}

.graph-editor-menu {
  position: relative;
}

.graph-editor-menu summary {
  display: block;
  list-style: none;
}

.graph-editor-menu summary::-webkit-details-marker {
  display: none;
}

.graph-editor-menu-content {
  position: absolute;
  left: 0;
  top: calc(100% + .25rem);
  z-index: 12;
  display: grid;
  gap: .2rem;
  min-width: 11rem;
  padding: .28rem;
  background: var(--surface);
  border: 1px solid var(--line-strong);
}

.graph-editor-menu-content button {
  width: 100%;
  text-align: left;
}

.graph-wrap.hide-graph-grid {
  background-image: none;
}

.graph-editor-panel {
  position: absolute;
  top: 3.2rem;
  right: .5rem;
  z-index: 6;
  display: grid;
  gap: .3rem;
  width: min(320px, calc(100% - 1rem));
  max-height: calc(100% - 4rem);
  overflow: auto;
  padding: .5rem;
  background: rgba(255, 255, 255, .96);
  border: 1px solid var(--line-strong);
}

.graph-editor-panel[hidden] {
  display: none;
}

.graph-editor-panel details {
  background: var(--surface);
  border: 1px solid var(--line);
}

.graph-editor-panel summary {
  padding: .42rem .5rem;
  color: var(--accent-dark);
  background: var(--surface-alt);
  cursor: pointer;
  font-size: .82rem;
  font-weight: 700;
}

.graph-editor-panel p,
.graph-editor-panel .graph-editor-controls,
.graph-editor-panel .graph-editor-actions {
  margin: 0;
  padding: .48rem .5rem;
}

.graph-editor-id,
.graph-editor-note {
  color: var(--muted);
  font-size: .78rem;
}

.graph-editor-controls {
  display: grid;
  gap: .45rem;
}

.graph-editor-field {
  display: grid;
  grid-template-columns: minmax(7.2rem, 1fr) minmax(0, 1fr);
  gap: .45rem;
  align-items: center;
  font-size: .78rem;
}

.graph-editor-field input,
.graph-editor-field select {
  min-width: 0;
  width: 100%;
  padding: .22rem .28rem;
  color: var(--ink);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 2px;
  font: inherit;
  font-size: .78rem;
}

.graph-wrap svg .is-selected-graph-element rect,
.graph-wrap svg .is-selected-graph-element circle,
.graph-wrap svg .is-selected-graph-element image {
  stroke-width: 2.45 !important;
}

.graph-wrap svg path.is-selected-graph-element,
.graph-wrap svg .edge.is-selected-graph-element {
  stroke-width: 2.9 !important;
}

.graph-wrap svg .graph-annotation {
  cursor: move;
}

.graph-wrap svg .graph-annotation[data-locked="1"] {
  cursor: default;
}

.graph-wrap svg .graph-annotation-handle {
  display: none;
  fill: var(--surface);
  stroke: var(--accent-dark);
  stroke-width: 1.5;
  vector-effect: non-scaling-stroke;
  cursor: nwse-resize;
}

.graph-wrap svg .is-selected-graph-element .graph-annotation-handle {
  display: block;
}

.graph-wrap svg .graph-annotation[data-locked="1"] .graph-annotation-handle {
  display: none;
}

.graph-wrap svg .graph-annotation-preview {
  pointer-events: none;
  vector-effect: non-scaling-stroke;
}

.graph-wrap.is-drawing-annotation {
  cursor: crosshair;
}

.graph-wrap svg .is-draggable-node.is-dragging {
  cursor: grabbing;
}

.graph-wrap svg .is-draggable-node.is-selected-node rect,
.graph-wrap svg .is-draggable-node.is-selected-node circle,
.graph-wrap svg .is-draggable-node.is-dragging rect,
.graph-wrap svg .is-draggable-node.is-dragging circle {
  stroke-width: 2.25 !important;
}

.graph-wrap svg .is-fixed-node {
  cursor: default;
}

.graph-wrap svg .graph-heading {
  cursor: grab;
  user-select: none;
}

.graph-wrap svg .graph-heading.is-dragging {
  cursor: grabbing;
}

.graph-wrap svg .graph-heading.is-selected-node text,
.graph-wrap svg .graph-heading.is-dragging text {
  paint-order: stroke;
  stroke: rgba(255, 255, 255, .72);
  stroke-width: 3px;
}

@media (max-width: 820px) {
  .graph-editor-toolbar {
    position: relative;
  }

  .graph-editor-menu {
    position: static;
  }

  .graph-editor-menu-content {
    left: .5rem;
    right: .5rem;
    width: auto;
  }

  .graph-editor-panel {
    position: relative;
    top: auto;
    right: auto;
    width: calc(100% - 1rem);
    max-height: none;
    margin: .5rem;
  }
}

.leaflet-provenance-map {
  min-height: 520px;
  border: 1px solid var(--line);
  background: var(--surface-alt);
  z-index: 0;
}

.leaflet-provenance-map .map-label {
  color: var(--ink);
  background: rgba(255, 255, 255, .86);
  border: 1px solid var(--line);
  border-radius: 2px;
  box-shadow: none;
  font-family: Georgia, "Times New Roman", serif;
}