/* ==========================================================================
   components.css - tlacitka, karty, ovladace, tabulky, editor.
   Buttons, cards, controls, tables and the editor.
   (c) 2026 Richard Lipka <lipka@fav.zcu.cz> - MIT license
   ========================================================================== */

/* --- hlavicka / header --------------------------------------------------- */

.mode-tabs button {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 8px 14px;
  border: 0;
  border-radius: var(--radius-pill);
  background: transparent;
  color: rgba(255, 255, 255, 0.9);
  font: inherit;
  font-weight: 600;
  font-size: 0.94rem;
  cursor: pointer;
  transition: background 0.16s ease, color 0.16s ease, transform 0.16s ease;
}

.mode-tabs button:hover {
  background: rgba(255, 255, 255, 0.16);
}

.mode-tabs button.is-active {
  background: #fff;
  color: var(--deep-800);
  box-shadow: var(--shadow-sm);
}

.lang-switch {
  display: flex;
  overflow: hidden;
  border: 1.5px solid rgba(255, 255, 255, 0.45);
  border-radius: var(--radius-pill);
}

.lang-switch button {
  padding: 6px 13px;
  border: 0;
  background: transparent;
  color: #fff;
  font: inherit;
  font-weight: 700;
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  cursor: pointer;
}

.lang-switch button.is-active {
  background: #fff;
  color: var(--deep-800);
}

.data-badge {
  padding: 5px 12px;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.16);
  font-size: 0.74rem;
  color: rgba(255, 255, 255, 0.92);
  max-width: 260px;
}

.data-badge.is-local {
  background: rgba(242, 169, 59, 0.9);
  color: var(--deep-900);
  font-weight: 600;
}

/* --- tlacitka / buttons -------------------------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  border: 1.5px solid transparent;
  border-radius: var(--radius-pill);
  font: inherit;
  font-weight: 600;
  font-size: 0.92rem;
  cursor: pointer;
  transition: transform 0.12s ease, box-shadow 0.16s ease, background 0.16s ease;
}

.btn:active {
  transform: translateY(1px);
}

.btn-primary {
  background: linear-gradient(135deg, var(--sea-600), var(--sea-500));
  color: #fff;
  box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
  box-shadow: var(--shadow);
}

.btn-secondary {
  background: #fff;
  border-color: var(--line);
  color: var(--deep-700);
}

.btn-secondary:hover {
  border-color: var(--sea-400);
}

.btn-ghost {
  background: transparent;
  border-color: var(--line);
  color: var(--muted);
}

.btn-ghost:hover {
  color: var(--deep-700);
  border-color: var(--sea-400);
}

.btn-danger {
  background: #fff;
  border-color: rgba(232, 105, 92, 0.5);
  color: var(--coral-dark);
}

.btn-danger:hover {
  background: rgba(232, 105, 92, 0.1);
}

.btn-block {
  width: 100%;
}

/* --- karty / cards ------------------------------------------------------- */

.card {
  padding: 18px;
  background: var(--paper);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid rgba(255, 255, 255, 0.7);
}

.card-title {
  display: block;
  margin: 0 0 12px;
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--deep-700);
}

.diagram-card,
.telescope-card {
  margin: 0;
}

.diagram-svg {
  display: block;
  width: 100%;
  height: auto;
}

.telescope-svg {
  display: block;
  width: 100%;
  max-width: 430px;
  margin: 0 auto;
  height: auto;
}

.map-svg {
  display: block;
  width: 100%;
  height: auto;
}

.chart-svg {
  display: block;
  width: 100%;
  height: auto;
}

/* --- ovladaci panel / control sidebar ------------------------------------ */

.control-group {
  padding: 16px;
  background: var(--paper);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

.control-title {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 12px;
  font-size: 1rem;
}

.step-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--sea-500), var(--sea-600));
  color: #fff;
  font-size: 0.84rem;
  font-weight: 700;
}

.field + .field {
  margin-top: 12px;
}

.field-label {
  display: block;
  margin-bottom: 6px;
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--muted);
}

.input-row {
  display: flex;
  align-items: center;
  gap: 8px;
}

.num-input,
.text-input,
.search-input {
  width: 100%;
  padding: 9px 12px;
  border: 1.5px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--foam-50);
  font: inherit;
  font-size: 1rem;
  color: var(--ink);
}

.num-input {
  max-width: 140px;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}

textarea.text-input {
  resize: vertical;
  line-height: 1.45;
  font-size: 0.9rem;
}

.num-input:focus,
.text-input:focus,
.search-input:focus {
  border-color: var(--sea-400);
  background: #fff;
  outline: none;
}

.unit {
  font-weight: 600;
  color: var(--muted);
}

.range-input {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  margin: 12px 0 0;
  height: 22px;
  background: transparent;
  cursor: pointer;
}

.range-input::-webkit-slider-runnable-track {
  height: 8px;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--aqua-200), var(--sea-400));
}

/* Posuvnik oparu jde od modre (cisty vzduch) do mlecne bile.
   The haze slider runs from blue (clear air) to milky white. */
.range-haze::-webkit-slider-runnable-track {
  background: linear-gradient(90deg, var(--sea-400), #c9d3d9, #eef1f3);
}

.range-haze::-moz-range-track {
  background: linear-gradient(90deg, var(--sea-400), #c9d3d9, #eef1f3);
}

.field-haze {
  margin-top: 14px;
}

.haze-value {
  margin: 6px 0 0;
  font-size: 0.86rem;
  font-weight: 600;
  color: var(--deep-700);
  font-variant-numeric: tabular-nums;
}

.range-input::-moz-range-track {
  height: 8px;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--aqua-200), var(--sea-400));
}

.range-input::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 22px;
  height: 22px;
  margin-top: -7px;
  border: 3px solid #fff;
  border-radius: 50%;
  background: var(--sea-600);
  box-shadow: var(--shadow-sm);
}

.range-input::-moz-range-thumb {
  width: 18px;
  height: 18px;
  border: 3px solid #fff;
  border-radius: 50%;
  background: var(--sea-600);
  box-shadow: var(--shadow-sm);
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 12px;
}

.chip {
  padding: 6px 11px;
  border: 1.5px solid var(--line);
  border-radius: var(--radius-pill);
  background: #fff;
  font: inherit;
  font-size: 0.78rem;
  color: var(--deep-700);
  cursor: pointer;
  transition: all 0.14s ease;
}

.chip:hover {
  border-color: var(--sea-400);
}

.chip.is-active {
  background: var(--sea-600);
  border-color: var(--sea-600);
  color: #fff;
}

/* --- obezne drahy / the observer's orbits -------------------------------- */

.chips-group {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
}

.chips-title {
  display: block;
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--deep-700);
  opacity: 0.72;
}

.chips-orbit {
  margin-top: 8px;
}

/* Vyska drahy patri k nazvu - u kazdeho telesa je jina, a prave to je pointa.
   The altitude belongs with the name: it differs per body, which is the point. */
.chip-value {
  opacity: 0.68;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.chip.is-active .chip-value {
  opacity: 0.85;
}

/* --- vyber objektu / object picker --------------------------------------- */

.search-input {
  margin-bottom: 10px;
}

.object-list-host {
  max-height: 340px;
  overflow-y: auto;
  padding-right: 4px;
  margin: 0 -2px;
}

.object-group {
  display: flex;
  align-items: center;
  gap: 6px;
  margin: 10px 0 6px;
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.object-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(88px, 1fr));
  gap: 8px;
}

.object-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  padding: 9px 5px 7px;
  border: 2px solid transparent;
  border-radius: var(--radius-sm);
  background: var(--foam-50);
  font: inherit;
  cursor: pointer;
  transition: all 0.14s ease;
}

.object-card:hover {
  background: var(--foam-100);
  transform: translateY(-2px);
}

.object-card.is-active {
  border-color: var(--sea-500);
  background: #fff;
  box-shadow: var(--shadow-sm);
}

.object-thumb {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  height: 42px;
  font-size: 1.4rem;
}

/* Vyska musi byt urcena EXPLICITNE. Nase SVG maji jen viewBox, zadnou vlastni
   sirku a vysku, takze uvnitr flexu se se samotnym max-height smrsknou na
   nulu a kresba je neviditelna. Sirka dopocitana z pomeru stran se pak orizne
   na max-width a object-fit ji vlozi dovnitr; object-position drzi objekt
   dole, aby stal na zemi jako v diagramu.
   The height has to be EXPLICIT: our SVGs carry only a viewBox, so with just
   max-height a flex item collapses to zero width and the drawing disappears.
   object-position keeps the object standing on the ground, as in the diagram. */
.object-thumb img {
  width: auto;
  height: 42px;
  max-width: 68px;
  object-fit: contain;
  object-position: bottom;
}

.object-name {
  font-size: 0.72rem;
  font-weight: 600;
  line-height: 1.2;
  text-align: center;
  color: var(--deep-800);
}

.object-height {
  font-size: 0.68rem;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.custom-height {
  margin-top: 12px;
}

/* --- vyber telesa / body picker ------------------------------------------ */

.planet-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(74px, 1fr));
  gap: 6px;
}

.planet-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 8px 4px 6px;
  border: 2px solid transparent;
  border-radius: var(--radius-sm);
  background: var(--foam-50);
  font: inherit;
  cursor: pointer;
  transition: all 0.14s ease;
}

.planet-card:hover {
  background: var(--foam-100);
  transform: translateY(-2px);
}

.planet-card.is-active {
  border-color: var(--sea-500);
  background: #fff;
  box-shadow: var(--shadow-sm);
}

.planet-icon {
  display: block;
  line-height: 0;
}

.planet-sphere {
  width: 28px;
  height: 28px;
}

.planet-name {
  font-size: 0.7rem;
  font-weight: 600;
  text-align: center;
  line-height: 1.15;
  color: var(--deep-800);
}

.planet-swatch {
  display: block;
  width: 26px;
  height: 5px;
  margin-top: 3px;
  border-radius: 3px;
}

.custom-diameter {
  margin-top: 14px;
}

.planet-info {
  font-weight: 600;
  color: var(--deep-700);
}

.step-badge-planet {
  background: linear-gradient(135deg, var(--deep-700), var(--deep-800));
  font-size: 0.9rem;
}

.stat-planet {
  border-left-color: var(--sun);
}

/* --- prepinac / switch --------------------------------------------------- */

.switch {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  user-select: none;
}

.switch input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.switch-track {
  position: relative;
  flex: 0 0 auto;
  width: 46px;
  height: 26px;
  border-radius: var(--radius-pill);
  background: var(--line);
  transition: background 0.18s ease;
}

.switch-knob {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: #fff;
  box-shadow: var(--shadow-sm);
  transition: transform 0.18s ease;
}

.switch input:checked + .switch-track {
  background: var(--sea-500);
}

.switch input:checked + .switch-track .switch-knob {
  transform: translateX(20px);
}

.switch input:focus-visible + .switch-track {
  outline: 3px solid var(--sea-400);
  outline-offset: 2px;
}

.switch-text {
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--deep-700);
}

/* --- shrnuti / verdict --------------------------------------------------- */

.verdict {
  padding: 16px 20px;
  border-radius: var(--radius);
  border-left: 8px solid var(--sea-500);
  background: var(--paper);
  box-shadow: var(--shadow-sm);
}

.verdict-title {
  font-size: 1.14rem;
  margin-bottom: 4px;
}

.verdict-text {
  font-size: 0.98rem;
  color: var(--deep-700);
}

.verdict-full {
  border-left-color: var(--kelp);
  background: linear-gradient(100deg, rgba(47, 158, 111, 0.1), var(--paper) 55%);
}
.verdict-partial {
  border-left-color: var(--sun);
  background: linear-gradient(100deg, rgba(242, 169, 59, 0.14), var(--paper) 55%);
}
.verdict-hidden {
  border-left-color: var(--coral);
  background: linear-gradient(100deg, rgba(232, 105, 92, 0.14), var(--paper) 55%);
}

/* --- dlazdice s cisly / stat tiles --------------------------------------- */

.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(148px, 1fr));
  gap: 10px;
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 11px 13px;
  border-radius: var(--radius-sm);
  background: var(--foam-50);
  border-left: 4px solid var(--aqua-300);
}

.stat-label {
  font-size: 0.76rem;
  font-weight: 600;
  color: var(--muted);
}

.stat-value {
  font-size: 1.16rem;
  font-weight: 700;
  color: var(--deep-800);
  font-variant-numeric: tabular-nums;
}

.stat-sub {
  font-size: 0.72rem;
  color: var(--muted);
}

.stat-horizon {
  border-left-color: var(--sea-500);
}
.stat-beyond {
  border-left-color: var(--sun);
}
.stat-hidden {
  border-left-color: var(--coral);
}
.stat-hidden .stat-value {
  color: var(--coral-dark);
}
.stat-visible {
  border-left-color: var(--kelp);
}
.stat-visible .stat-value {
  color: var(--kelp-dark);
}
.stat-vanish {
  border-left-color: var(--deep-700);
}

/* --- zajimavost / fun fact ----------------------------------------------- */

.fact {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 14px 18px;
  border-radius: var(--radius);
  background: linear-gradient(120deg, var(--sand), #fff8e8);
  border: 1.5px solid rgba(242, 169, 59, 0.35);
  font-size: 0.92rem;
  color: #6a4f1c;
}

.fact-icon {
  font-size: 1.3rem;
  line-height: 1.2;
}

/* --- rezim "kdy zmizi" / vanish mode ------------------------------------- */

.big-result {
  padding: 20px 22px;
  border-radius: var(--radius);
  background: var(--paper);
  box-shadow: var(--shadow);
  border-top: 6px solid var(--sea-500);
}

.big-label {
  display: block;
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--muted);
}

.big-value {
  display: block;
  margin: 4px 0 2px;
  font-size: 2.3rem;
  font-weight: 800;
  line-height: 1.05;
  color: var(--deep-800);
  font-variant-numeric: tabular-nums;
}

.big-sub {
  font-size: 0.84rem;
  color: var(--muted);
}

.big-vanish {
  border-top-color: var(--coral);
}
.big-vanish .big-value {
  color: var(--coral-dark);
}
.big-start {
  border-top-color: var(--kelp);
}
.big-start .big-value {
  color: var(--kelp-dark);
}

.sum-strip {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 14px;
  padding: 14px 18px;
  border-radius: var(--radius);
  background: var(--paper);
  box-shadow: var(--shadow-sm);
}

.sum-part {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 120px;
}

.sum-label {
  font-size: 0.74rem;
  color: var(--muted);
}

.sum-part strong {
  font-size: 1.16rem;
  color: var(--deep-800);
  font-variant-numeric: tabular-nums;
}

.sum-op {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--sea-400);
}

.sum-total strong {
  color: var(--coral-dark);
}

.explain-card {
  background: linear-gradient(120deg, var(--foam-100), #fff 60%);
}

/* --- tabulka / table ----------------------------------------------------- */

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

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  font-variant-numeric: tabular-nums;
}

.data-table th,
.data-table td {
  padding: 8px 12px;
  text-align: left;
  border-bottom: 1px solid var(--line-soft);
  white-space: nowrap;
}

.data-table th {
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
}

.data-table tr.row-horizon {
  background: rgba(47, 158, 111, 0.1);
}

.data-table tr.row-vanish {
  background: rgba(232, 105, 92, 0.12);
  font-weight: 600;
}

.mini-bar {
  display: inline-block;
  width: 84px;
  height: 9px;
  margin-right: 8px;
  border-radius: 5px;
  background: var(--line-soft);
  overflow: hidden;
  vertical-align: middle;
}

.mini-bar-fill {
  display: block;
  height: 100%;
  border-radius: 5px;
  background: linear-gradient(90deg, var(--kelp), var(--sea-400));
}

.mini-bar-text {
  font-size: 0.82rem;
  color: var(--muted);
}

.row-note {
  display: block;
  font-size: 0.74rem;
  color: var(--muted);
}

/* --- srovnani objektu / comparison --------------------------------------- */

.compare-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.compare-row {
  display: grid;
  grid-template-columns: 34px minmax(90px, 1.1fr) minmax(80px, 2.6fr) auto;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 6px 8px;
  border: 0;
  border-radius: var(--radius-sm);
  background: transparent;
  font: inherit;
  text-align: left;
  cursor: pointer;
}

.compare-row:hover {
  background: var(--foam-50);
}

.compare-row.is-active {
  background: var(--foam-100);
  box-shadow: inset 0 0 0 2px var(--sea-400);
}

.compare-thumb {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 30px;
}

.compare-thumb img {
  max-height: 30px;
  max-width: 32px;
  object-fit: contain;
}

.compare-name {
  font-size: 0.84rem;
  font-weight: 600;
  color: var(--deep-800);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.compare-track {
  height: 14px;
  border-radius: 7px;
  background: var(--line-soft);
  overflow: hidden;
}

.compare-fill {
  display: block;
  height: 100%;
  border-radius: 7px;
  background: linear-gradient(90deg, var(--sea-400), var(--deep-700));
}

.compare-value {
  font-size: 0.84rem;
  font-weight: 700;
  color: var(--deep-700);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

/* --- editor -------------------------------------------------------------- */

.editor-toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 12px 14px;
  background: var(--paper);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

.editor-status {
  margin-left: auto;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--muted);
}

.editor-status.is-ok {
  color: var(--kelp-dark);
}
.editor-status.is-error {
  color: var(--coral-dark);
}

.editor-note {
  padding: 0 4px;
}

.editor-errors {
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  background: rgba(232, 105, 92, 0.12);
  border: 1.5px solid rgba(232, 105, 92, 0.4);
  color: var(--coral-dark);
  font-size: 0.88rem;
}

.editor-errors ul {
  margin: 6px 0 0;
  padding-left: 20px;
}

.editor-side {
  padding: 14px;
  background: var(--paper);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

.editor-side-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 10px;
}

.editor-count {
  font-size: 0.76rem;
  color: var(--muted);
}

.editor-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
  max-height: 460px;
  overflow-y: auto;
  margin-top: 10px;
}

.editor-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px 9px;
  border: 2px solid transparent;
  border-radius: var(--radius-sm);
  background: var(--foam-50);
  font: inherit;
  text-align: left;
  cursor: pointer;
}

.editor-item:hover {
  background: var(--foam-100);
}

.editor-item.is-active {
  border-color: var(--sea-500);
  background: #fff;
}

.editor-item-thumb {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  flex: 0 0 auto;
}

.editor-item-thumb img {
  max-width: 34px;
  max-height: 34px;
  object-fit: contain;
}

.editor-item-text {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.editor-item-text strong {
  font-size: 0.86rem;
  color: var(--deep-800);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.editor-item-text span {
  font-size: 0.74rem;
  color: var(--muted);
}

.editor-form {
  padding: 18px;
  background: var(--paper);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  min-width: 0;
}

.editor-empty {
  color: var(--muted);
  text-align: center;
  padding: 40px 0;
}

.form-section + .form-section,
.form-actions {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--line-soft);
}

.form-section h4 {
  margin-bottom: 12px;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--sea-600);
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 12px 16px;
}

.form-row .num-input {
  max-width: none;
}

.form-row + .form-row {
  margin-top: 12px;
}

.form-actions {
  display: flex;
  gap: 8px;
}

.image-editor {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 18px;
  align-items: start;
}

.image-preview {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
  min-width: 150px;
  min-height: 180px;
  padding: 12px;
  border-radius: var(--radius-sm);
  background: linear-gradient(180deg, var(--foam-50), var(--aqua-200));
  border: 1.5px dashed var(--line);
}

.image-preview img {
  object-fit: contain;
}

.image-preview-caption {
  font-size: 0.7rem;
  color: var(--muted);
  text-align: center;
}

.image-actions {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
}

.raw-wrap {
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: flex-start;
}

/* --- rezim Geometrie / the geometry mode ---------------------------------- */

.geometry-svg {
  display: block;
  width: 100%;
  height: auto;
}

.given-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--gap);
}

.given-item {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 14px 18px;
  border-radius: var(--radius);
  background: var(--paper);
  box-shadow: var(--shadow-sm);
  border-left: 6px solid var(--deep-700);
}

.given-symbol {
  font-size: 1.5rem;
  font-weight: 700;
  font-style: italic;
  color: var(--deep-800);
}

.given-item strong {
  font-size: 1.25rem;
  color: var(--deep-800);
  font-variant-numeric: tabular-nums;
}

.given-note {
  margin-left: auto;
  font-size: 0.76rem;
  color: var(--muted);
  text-align: right;
}

.given-observer {
  border-left-color: var(--sea-600);
}
.given-object {
  border-left-color: var(--coral);
}

.formula-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.formula-note {
  padding: 8px 12px;
  font-size: 0.86rem;
  color: var(--muted);
}

.formula-row {
  display: grid;
  grid-template-columns: minmax(190px, 1.2fr) minmax(0, 1.3fr) minmax(140px, auto);
  align-items: center;
  gap: 8px 16px;
  padding: 10px 12px;
  border-radius: var(--radius-sm);
  background: var(--foam-50);
  border-left: 4px solid var(--line);
}

/* Vzorce sazi prohlizec jako MathML (js/core/math.js). Matematicke pismo je
   systemove - zadne webove fonty, aplikace musi jet offline.
   Formulas are native MathML (js/core/math.js). The maths font is a system
   one - no web fonts, the app has to run offline. */
.formula-row math,
.formula-standalone math {
  font-family: "Cambria Math", "STIX Two Math", "Latin Modern Math", "Times New Roman", math, serif;
  font-size: 1.14em;
}

/* MathML se samo nezalomi. Kdyby byl vzorec sirsi nez radek (na telefonu),
   posune se uvnitr sve bunky, misto aby rozsiril celou stranku.
   MathML never line-breaks. A formula wider than its row (on a phone) scrolls
   inside its own cell instead of widening the whole page. */
.formula-symbolic,
.formula-sub,
.formula-standalone {
  min-width: 0;
  max-width: 100%;
  overflow-x: auto;
  overflow-y: hidden;
}

.formula-symbolic {
  font-size: 1rem;
  color: var(--deep-800);
}

.formula-sub {
  font-size: 0.9rem;
  color: var(--muted);
}

.formula-result {
  font-size: 1rem;
  color: var(--deep-800);
  text-align: right;
  white-space: nowrap;
}

.formula-row.row-observer {
  border-left-color: var(--sea-500);
}
.formula-row.row-observer .formula-result {
  color: var(--sea-600);
}
.formula-row.row-object {
  border-left-color: var(--coral);
}
.formula-row.row-object .formula-result {
  color: var(--coral-dark);
}
.formula-row.row-total {
  border-left-color: var(--kelp);
  background: rgba(47, 158, 111, 0.12);
}
.formula-row.row-total .formula-result {
  color: var(--kelp-dark);
  font-size: 1.12rem;
  font-weight: 700;
}
.formula-row.row-approx {
  border-left-color: var(--sun);
}

.formula-standalone {
  display: block;
  margin-top: 10px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  background: rgba(11, 42, 58, 0.05);
  color: var(--deep-800);
  font-size: 1rem;
}

.formula-standalone math[display="block"] {
  margin: 0;
  text-align: left;
}

/* Radek bez dosazeni a bez vysledku si bere celou sirku, aby se dlouhy
   vzorec nezalomil uprostred vyrazu. */
.formula-row.formula-solo {
  grid-template-columns: 1fr;
}

/* --- rezim pro ucitele a tisk / teacher mode and print -------------------- */

.geo-tools {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 14px 18px;
}

.geo-tools-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 26px;
}

.geo-print {
  margin-left: auto;
  font-size: 0.78rem;
}

.geo-tools .hint {
  margin: 0;
}

.geo-chips .chips {
  margin-top: 6px;
}

/* Symboly velicin jako ve vzorcich: kurzivou a matematickym pismem.
   Quantity symbols as in the formulas: italic, in the maths font. */
.geo-chip {
  min-width: 2.6em;
  font-family: "Cambria Math", "STIX Two Math", "Latin Modern Math", "Times New Roman", serif;
  font-size: 1rem;
  font-style: italic;
}

.geo-presets {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 8px;
}

/* Zadani ulohy nad konstrukci. / The task statement above the construction. */
.geo-task {
  margin: 0;
  padding: 10px 16px;
  border-left: 6px solid var(--coral);
  border-radius: var(--radius-sm);
  background: var(--paper);
  box-shadow: var(--shadow-sm);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--deep-800);
}

.given-ask,
.math-ask {
  color: var(--coral-dark);
  font-weight: 800;
}

/* V rezimu pro ucitele jde na hodnoty klepnout. / Clickable values. */
.geo-teacher .given-item[data-q],
.geo-teacher .formula-result[data-q] {
  cursor: pointer;
}

.geo-teacher .given-item[data-q]:hover,
.geo-teacher .formula-result[data-q]:hover {
  outline: 2px dashed var(--sea-400);
  outline-offset: 3px;
}

/* Cernobile: zadne barevne plochy ani stiny. Pozorovatel plnou carou,
   objekt carkovane, stejne jako v obrazku.
   Black and white: no coloured areas, no shadows. Observer solid, object
   dashed, as in the figure. */
.geo-bw .given-item,
.geo-bw .geo-task {
  background: #fff;
  box-shadow: none;
  border: 1px solid #000;
  border-left: 6px solid #000;
}

.geo-bw .given-object {
  border-left-style: dashed;
}

.geo-bw .given-symbol,
.geo-bw .given-item strong,
.geo-bw .given-note,
.geo-bw .given-ask,
.geo-bw .math-ask,
.geo-bw .geo-task {
  color: #000;
}

.geo-bw .formula-row,
.geo-bw .formula-row.row-total {
  background: #fff;
  border-left-color: #000;
}

.geo-bw .formula-row.row-object {
  border-left-style: dashed;
}

.geo-bw .formula-row.row-approx {
  border-left-color: #888;
}

.geo-bw .formula-row .formula-result,
.geo-bw .formula-symbolic,
.geo-bw .formula-sub,
.geo-bw .formula-standalone {
  color: #000;
}

.geo-bw .formula-standalone,
.geo-bw .derive-inverse {
  background: #fff;
  border: 1px solid #000;
  color: #000;
}

/* Sedy pomocny text je na papire bledy. / Grey helper text prints faint. */
.geo-bw .formula-note,
.geo-bw .panel-sub,
.geo-bw .hint {
  color: #222;
}

/* --- export obrazku / picture export -------------------------------------- */

/* Titulek karty s tlacitky vpravo. */
.card-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.export-buttons {
  display: inline-flex;
  gap: 4px;
  flex: none;
}

/* Zamerne nenapadne - jsou to pomocna tlacitka, ne hlavni akce. */
.export-btn {
  padding: 3px 8px;
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  cursor: pointer;
  transition: color 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}

.export-btn:hover {
  color: var(--sea-600);
  border-color: var(--sea-400);
  background: var(--foam-50);
}

/* --- skutecne rozhledy / real sightlines ---------------------------------- */

.sightlines-card {
  margin-top: 4px;
}

.sl-list {
  list-style: none;
  margin: 10px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.sl-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto auto;
  align-items: center;
  gap: 6px 14px;
  padding: 9px 12px;
  border-radius: var(--radius-sm);
  background: var(--foam-50);
  border-left: 4px solid var(--line);
}

/* Hranicni pripady jsou na tom seznamu to nejzajimavejsi. */
.sl-row.is-close {
  border-left-color: var(--sun);
  background: rgba(242, 169, 59, 0.1);
}

.sl-where {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 8px;
  min-width: 0;
}

.sl-from,
.sl-to {
  font-size: 0.92rem;
  color: var(--deep-800);
}

.sl-arrow {
  color: var(--muted);
}

.sl-heights {
  flex-basis: 100%;
  font-size: 0.74rem;
  color: var(--muted);
}

.sl-numbers {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  line-height: 1.25;
}

.sl-distance {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--deep-900);
  font-variant-numeric: tabular-nums;
}

.sl-margin {
  font-size: 0.72rem;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.sl-badge {
  padding: 3px 11px;
  border-radius: var(--radius-pill);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  color: #fff;
}

.sl-badge-yes {
  background: var(--kelp-dark);
}

.sl-badge-no {
  background: var(--coral-dark);
}

.sl-try {
  white-space: nowrap;
}

.sl-notes {
  margin: 12px 0 0;
  padding-left: 18px;
  font-size: 0.82rem;
  line-height: 1.5;
  color: var(--muted);
}

.sl-notes li {
  margin-bottom: 4px;
}

.sl-warning {
  margin-top: 12px;
}

@media (max-width: 620px) {
  .sl-row {
    grid-template-columns: minmax(0, 1fr) auto;
  }
  .sl-numbers {
    align-items: flex-start;
  }
}

/* --- odvozeni funkci / deriving the functions ----------------------------- */

.sub-title {
  margin: 22px 0 8px;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--deep-800);
}

.sub-title:first-of-type {
  margin-top: 12px;
}

/* Vysledek celeho odvozeni - obe funkce jsou navzajem inverzni. */
.derive-inverse {
  margin: 18px 0 0;
  padding: 12px 14px;
  border-left: 4px solid var(--kelp);
  border-radius: var(--radius-sm);
  background: rgba(47, 158, 111, 0.12);
  color: var(--deep-800);
}

@media (max-width: 720px) {
  .formula-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
  }
  .formula-result {
    text-align: left;
  }
  /* Na telefonu se vzorce vejdou na sirku karty, jen kdyz je pismo o kus
     mensi; posouvani uvnitr bunky je az posledni zachrana.
     On a phone the formulas fit the card only with a slightly smaller font;
     scrolling inside the cell is the last resort. */
  .formula-row math,
  .formula-standalone math {
    font-size: 0.96em;
  }
}

.raw-json {
  width: 100%;
  padding: 12px;
  border: 1.5px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--foam-50);
  font-family: "Cascadia Mono", Consolas, "SF Mono", Menlo, monospace;
  font-size: 0.78rem;
  line-height: 1.45;
  resize: vertical;
}