:root {
  color-scheme: light;
  --bg: #f4f6f2;
  --panel: #ffffff;
  --ink: #202522;
  --muted: #68736d;
  --line: #d8ded8;
  --accent: #0f766e;
  --accent-2: #cf6f3e;
  --danger: #9f2f2f;
  --shadow: 0 20px 50px rgba(34, 42, 38, 0.12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: Inter, "Segoe UI", Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
}

body.visual-expanded {
  overflow: hidden;
}

button,
input,
select {
  font: inherit;
}

.app {
  min-height: 100vh;
  padding: 24px;
}

.workspace {
  max-width: 1500px;
  margin: 0 auto;
}

.topbar {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 18px;
}

.eyebrow {
  margin: 0 0 4px;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0;
}

h1,
h2 {
  margin: 0;
}

h1 {
  font-size: clamp(2rem, 4vw, 4.2rem);
  line-height: 0.95;
}

h2 {
  font-size: 1rem;
}

.fill-meter {
  min-width: 220px;
  display: grid;
  gap: 8px;
  font-weight: 800;
  text-align: right;
}

.meter-track {
  height: 12px;
  border: 1px solid var(--line);
  background: #e9eee9;
  overflow: hidden;
}

.meter-bar {
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
}

.layout {
  display: grid;
  grid-template-columns: minmax(330px, 440px) minmax(360px, 1fr) minmax(330px, 420px);
  gap: 18px;
  align-items: stretch;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  padding: 18px;
}

.section-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 14px;
}

.section-title span {
  color: var(--muted);
  font-weight: 800;
}

label {
  display: grid;
  gap: 6px;
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 700;
}

input,
select {
  width: 100%;
  min-height: 42px;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 9px 10px;
  color: var(--ink);
  background: #fbfcfb;
}

input:focus,
select:focus {
  outline: 2px solid rgba(15, 118, 110, 0.22);
  border-color: var(--accent);
}

.grid-3,
.grid-4,
.grid-5 {
  display: grid;
  gap: 10px;
}

.grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.grid-5 {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.mode-switch {
  display: inline-flex;
  gap: 6px;
  margin-top: 16px;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f8faf8;
}

.mode-button {
  min-width: 96px;
  height: 36px;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--muted);
  font-weight: 900;
  cursor: pointer;
}

.mode-button.is-active {
  background: var(--ink);
  color: white;
}

body[data-distribution-mode="percent"] .pieces-field,
body[data-distribution-mode="pieces"] .share-field {
  display: none;
}

.packages-title {
  margin-top: 22px;
}

.icon-button {
  width: 34px;
  height: 34px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #f8faf8;
  color: var(--ink);
  font-size: 1.2rem;
  font-weight: 800;
  cursor: pointer;
}

.packages {
  display: grid;
  gap: 10px;
}

.package-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 12px;
  background: #fbfcfb;
}

.package-head {
  display: grid;
  grid-template-columns: minmax(110px, 0.85fr) minmax(140px, 1fr) 34px;
  gap: 8px;
  margin-bottom: 10px;
}

.package-name {
  font-weight: 800;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.actions button {
  min-height: 42px;
  border: 0;
  border-radius: 6px;
  padding: 0 14px;
  background: var(--accent);
  color: white;
  font-weight: 800;
  cursor: pointer;
}

.actions .secondary {
  background: #25312d;
}

.actions #confirmLayout.is-pending {
  background: var(--accent-2);
  box-shadow: 0 0 0 3px rgba(207, 111, 62, 0.2);
}

.warning {
  min-height: 1.4em;
  margin: 14px 0 0;
  color: var(--danger);
  font-weight: 700;
  line-height: 1.4;
}

.visual-area {
  min-width: 0;
  min-height: 620px;
  display: grid;
  grid-template-rows: auto auto minmax(360px, 1fr) auto auto;
  align-items: center;
  gap: 16px;
  padding: 28px;
  border: 1px solid var(--line);
  background:
    linear-gradient(90deg, rgba(32, 37, 34, 0.05) 1px, transparent 1px),
    linear-gradient(rgba(32, 37, 34, 0.05) 1px, transparent 1px),
    #edf1ec;
  background-size: 34px 34px;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.visual-area.is-expanded {
  position: fixed;
  inset: 12px;
  z-index: 1000;
  min-height: 0;
  height: calc(100vh - 24px);
  grid-template-rows: auto auto minmax(0, 1fr);
  padding: 16px;
}

.visual-area.is-expanded .three-view,
.visual-area.is-expanded #container3d {
  min-height: 0;
}

.visual-area.is-expanded .container-visual,
.visual-area.is-expanded .legend {
  display: none;
}

.view-tabs {
  display: inline-flex;
  gap: 6px;
  justify-self: start;
  padding: 4px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.75);
}

.view-tab {
  min-width: 78px;
  height: 34px;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--muted);
  font-weight: 900;
  cursor: pointer;
}

.view-tab.is-active {
  background: var(--ink);
  color: white;
}

.view-divider {
  width: 1px;
  align-self: stretch;
  background: var(--line);
}

.view-tool {
  width: 34px;
  height: 34px;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: var(--ink);
  font-size: 1.15rem;
  font-weight: 900;
  cursor: pointer;
}

.view-tool-wide {
  width: auto;
  min-width: 48px;
  padding: 0 8px;
  font-size: 0.78rem;
}

.view-tool:hover,
.view-tool:focus-visible {
  background: white;
}

.packing-navigator {
  width: 100%;
  min-width: 0;
  display: grid;
  gap: 8px;
  padding: 10px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.86);
}

.depth-row {
  display: none;
  justify-content: center;
}

.visual-area[data-view="two"] .depth-row {
  display: flex;
}

.packing-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.packing-row > strong {
  min-width: 118px;
  text-align: center;
}

.packing-row > button:not(.icon-button) {
  min-height: 34px;
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 0 10px;
  background: white;
  color: var(--ink);
  font-weight: 800;
  cursor: pointer;
}

.packing-row > button.is-active:not(.icon-button) {
  border-color: var(--ink);
  background: var(--ink);
  color: white;
}

.packing-steps {
  border-top: 1px solid var(--line);
  padding-top: 8px;
}

.placement-detail {
  min-height: 2.8em;
  margin: 0;
  color: var(--muted);
  font-size: 0.84rem;
  font-weight: 700;
  line-height: 1.4;
  text-align: center;
}

.packing-row button:disabled {
  cursor: not-allowed;
  opacity: 0.38;
}

.three-view {
  position: relative;
  width: 100%;
  min-width: 0;
  min-height: 360px;
  align-self: stretch;
  overflow: hidden;
}

#container3d {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 360px;
  cursor: grab;
  touch-action: none;
}

#container3d:active {
  cursor: grabbing;
}

.three-fallback {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 24px;
  color: var(--danger);
  font-weight: 800;
  text-align: center;
}

.three-fallback[hidden] {
  display: none;
}

.container-visual {
  position: relative;
  width: min(100%, 760px);
  aspect-ratio: 1.9 / 1;
  margin: auto;
  transform: skewX(-10deg);
  border: 3px solid rgba(32, 37, 34, 0.88);
  background: rgba(255, 255, 255, 0.5);
  box-shadow: 18px 18px 0 rgba(32, 37, 34, 0.1);
  overflow: hidden;
}

.visual-area[data-view="three"] .container-visual {
  height: 72px;
  aspect-ratio: auto;
  transform: none;
}

.visual-area[data-view="volume"] .three-view {
  display: none;
}

.visual-area:not([data-view="three"]) .view-divider,
.visual-area:not([data-view="three"]) .view-tool:not(#expandView) {
  display: none;
}

.visual-area[data-view="volume"] #expandView {
  display: none;
}

.wall-2d {
  position: absolute;
  left: 50%;
  top: 50%;
  width: calc(100% - 28px);
  height: calc(100% - 28px);
  transform: translate(-50%, -50%);
  display: none;
  border: 4px solid var(--ink);
  background:
    linear-gradient(90deg, rgba(32, 37, 34, 0.05) 1px, transparent 1px),
    linear-gradient(rgba(32, 37, 34, 0.05) 1px, transparent 1px),
    #f8faf8;
  background-size: 10% 10%;
  overflow: hidden;
}

.wall-2d::before,
.wall-2d::after {
  position: absolute;
  left: 8px;
  z-index: 1000;
  padding: 2px 5px;
  background: rgba(255, 255, 255, 0.84);
  color: var(--ink);
  font-size: 0.68rem;
  font-weight: 900;
}

.wall-2d::before {
  content: "STROP";
  top: 7px;
}

.wall-2d::after {
  content: "PODLAHA";
  bottom: 7px;
}

.wall-piece {
  position: absolute;
  display: grid;
  place-items: center;
  min-width: 2px;
  min-height: 2px;
  border: 2px solid #101412;
  color: white;
  font-size: 0.72rem;
  font-weight: 900;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.8);
  overflow: hidden;
}

.wall-2d.is-overview .wall-piece {
  opacity: 0.82;
}

.visual-area[data-view="two"] #container3d {
  display: none;
}

.visual-area[data-view="two"] .wall-2d {
  display: block;
}

.visual-area[data-view="two"] .container-visual {
  display: none;
}

.visual-area[data-view="volume"] .packing-navigator {
  display: none;
}

.visual-area[data-view="volume"] {
  grid-template-rows: auto 1fr auto;
}

.visual-area[data-view="volume"] .container-visual {
  height: auto;
  aspect-ratio: 1.9 / 1;
}

.container-visual::before,
.container-visual::after {
  content: "";
  position: absolute;
  inset: 10px;
  border: 1px dashed rgba(32, 37, 34, 0.28);
  pointer-events: none;
  z-index: 4;
}

.container-visual::after {
  inset: 22px;
}

.container-blocks {
  position: absolute;
  inset: 0;
  display: flex;
  height: 100%;
}

.load-block {
  height: 100%;
  min-width: 1px;
  display: grid;
  place-items: center;
  color: white;
  font-weight: 900;
  text-shadow: 0 1px 12px rgba(0, 0, 0, 0.35);
  box-shadow: inset -10px 0 0 rgba(0, 0, 0, 0.08);
}

.container-lines {
  position: absolute;
  inset: 0;
  z-index: 3;
  background:
    repeating-linear-gradient(90deg, transparent 0 42px, rgba(255, 255, 255, 0.32) 42px 44px),
    repeating-linear-gradient(0deg, transparent 0 38px, rgba(32, 37, 34, 0.12) 38px 40px);
  pointer-events: none;
}

.legend {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}

.legend-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 10px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.78);
  border-radius: 6px;
  font-weight: 800;
}

.swatch {
  width: 14px;
  height: 14px;
  border-radius: 3px;
}

.summary {
  display: grid;
  gap: 10px;
  margin-bottom: 16px;
}

.summary div {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  border-bottom: 1px solid var(--line);
  padding-bottom: 10px;
}

.summary span {
  color: var(--muted);
  font-weight: 700;
}

.table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
}

th,
td {
  padding: 10px 8px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

th {
  color: var(--muted);
  font-size: 0.78rem;
  text-transform: uppercase;
}

.result-name {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 800;
}

.small-note {
  display: block;
  margin-top: 3px;
  color: var(--muted);
  font-size: 0.78rem;
}

@media (max-width: 1180px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .visual-area {
    min-height: 430px;
  }
}

@media (max-width: 720px) {
  .app {
    padding: 14px;
  }

  .topbar {
    display: grid;
    align-items: start;
  }

  .fill-meter {
    min-width: 0;
    text-align: left;
  }

  .grid-3,
  .grid-4,
  .grid-5 {
    grid-template-columns: 1fr 1fr;
  }

  .visual-area {
    padding: 16px;
    min-height: 320px;
  }

  .view-tabs {
    width: 100%;
    flex-wrap: wrap;
  }

  .view-tab {
    flex: 1 1 78px;
  }

  .view-divider {
    display: none;
  }

  .visual-area.is-expanded > * {
    min-width: 0;
  }

  .three-view,
  #container3d {
    min-height: 300px;
  }

  .container-visual {
    transform: none;
    aspect-ratio: 1.45 / 1;
  }

  .packing-row {
    flex-wrap: wrap;
  }
}

@media (max-width: 460px) {
  .grid-3,
  .grid-4,
  .grid-5 {
    grid-template-columns: 1fr;
  }

  th,
  td {
    padding-inline: 5px;
  }

  .package-head {
    grid-template-columns: 1fr 34px;
  }

  .package-type-select {
    grid-column: 1 / -1;
  }
}