/* ==========================================================================
   VENTONIQ – kalkulačka (/kalkulacka/)
   Doplňuje style.css, používá stejné barvy a písmo.
   ========================================================================== */

/* Anglický název drobným písmem pod českým */
.en {
  display: block;
  margin-top: 2px;
  font-size: 0.75rem;
  font-weight: 400;
  font-stretch: 100%;
  letter-spacing: 0.02em;
  line-height: 1.3;
  color: var(--steel);
}
.en-dark { color: var(--steel-on-dark); }

/* Aktivní položka menu */
.main-nav a[aria-current="page"] { color: var(--white); }

/* --- Úvod ----------------------------------------------------------------- */

.calc-hero {
  background: var(--navy);
  color: var(--white);
  padding-block: clamp(48px, 7vw, 88px) clamp(40px, 5vw, 64px);
}

.calc-hero h1 {
  font-size: clamp(2rem, 1.2rem + 3vw, 3.25rem);
  line-height: 1.06;
  letter-spacing: -0.015em;
}
.calc-hero h1 .en { margin-top: 10px; font-size: 0.9375rem; letter-spacing: 0.04em; }

.calc-lead {
  max-width: 62ch;
  margin: 20px 0 0;
  font-size: 1.0625rem;
  color: var(--steel-on-dark);
}

.calc-toc ol {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  margin: 40px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-dark);
  counter-reset: toc;
}

.calc-toc li { counter-increment: toc; border-bottom: 1px solid var(--line-dark); }

.calc-toc a {
  display: block;
  position: relative;
  padding: 16px 16px 16px 40px;
  color: var(--white);
  font-weight: 600;
  text-decoration: none;
  transition: background-color 0.15s;
}
.calc-toc a::before {
  content: counter(toc, decimal-leading-zero);
  position: absolute;
  left: 4px; top: 17px;
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--air);
}
.calc-toc a:hover { background: var(--navy-2); color: var(--white); }

@media (max-width: 800px) { .calc-toc ol { grid-template-columns: 1fr 1fr; } }
@media (max-width: 480px) { .calc-toc ol { grid-template-columns: 1fr; } }

/* --- Karty kalkulaček ----------------------------------------------------- */

.calc-body {
  background: var(--light);
  padding-block: clamp(32px, 5vw, 64px) clamp(64px, 8vw, 104px);
}

.calc-noscript {
  padding: 16px 20px;
  border-radius: var(--radius);
  background: #FFF3C4;
  color: #5C4500;
  font-weight: 600;
}

.calc-card {
  margin-bottom: 20px;
  padding: clamp(24px, 4vw, 40px);
  background: var(--white);
  border-radius: var(--radius-lg);
}

.calc-head {
  display: flex;
  align-items: flex-start;
  gap: 16px;
}

.calc-num {
  flex: none;
  padding-top: 6px;
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--signal);
}

.calc-head h2 { font-size: clamp(1.375rem, 1.1rem + 1.1vw, 1.875rem); }
.calc-head h2 .en { margin-top: 6px; font-size: 0.8125rem; }

/* Krátký popis pod nadpisem kalkulačky */
.calc-intro {
  margin: 16px 0 0;
  color: var(--steel);
}

/* Zalomení řádku jen na větších obrazovkách; na mobilu text teče volně */
@media (max-width: 760px) {
  .br-desk { display: none; }
}

.calc-formula {
  margin: 20px 0 28px;
  padding: 12px 16px;
  border-left: 4px solid var(--signal);
  border-radius: 0 var(--radius) var(--radius) 0;
  background: #F4F6F7;
  font-size: 1rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
  overflow-x: auto;
  white-space: nowrap;
}

.calc-form {
  display: grid;
  grid-template-columns: minmax(0, 3fr) minmax(0, 2fr);
  gap: 24px 40px;
  align-items: start;
}

.calc-form-cyl { grid-template-columns: minmax(0, 1.1fr) minmax(0, 1.5fr) minmax(0, 1.3fr); }

.calc-inputs {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 20px;
}
.calc-form-cyl .calc-inputs { grid-template-columns: 1fr 1fr; }

.calc-field label {
  display: block;
  margin-bottom: 8px;
  font-size: 0.9375rem;
  font-weight: 600;
}
.calc-field label b,
.calc-result-label b { color: var(--signal); font-weight: 700; }

.calc-input {
  display: flex;
  align-items: stretch;
  border: 1.5px solid #C4CBD1;
  border-radius: var(--radius);
  background: var(--white);
  transition: border-color 0.15s, box-shadow 0.15s;
}
.calc-input:hover { border-color: var(--steel); }
.calc-input:focus-within {
  border-color: var(--signal);
  box-shadow: 0 0 0 3px rgba(11, 107, 203, 0.2);
}

.calc-input input,
.calc-input select {
  flex: 1 1 auto;
  min-width: 0;
  width: 100%;
  padding: 11px 14px;
  border: 0;
  border-radius: var(--radius);
  background: transparent;
  color: var(--navy);
  font: inherit;
  font-size: 1rem; /* 16 px – iOS pak nezvětšuje stránku */
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}
.calc-input input:focus,
.calc-input select:focus { outline: none; }
.calc-input select { cursor: pointer; }

.calc-input .unit {
  display: flex;
  align-items: center;
  padding: 0 14px;
  border-left: 1px solid var(--line-light);
  font-size: 0.875rem;
  color: var(--steel);
  white-space: nowrap;
}

.calc-field.has-error .calc-input { border-color: #C62828; }

.calc-hint {
  min-height: 1.3em;
  margin: 4px 0 0;
  font-size: 0.8125rem;
  color: var(--steel);
}

/* Výsledky */
.calc-results {
  display: grid;
  gap: 12px;
  padding: 20px;
  border-radius: var(--radius);
  background: var(--navy);
  color: var(--white);
}

.calc-result {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  align-items: baseline;
  gap: 4px 10px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-dark);
}
.calc-result:last-child { padding-bottom: 0; border-bottom: 0; }

.calc-result-label { font-size: 0.875rem; font-weight: 600; color: var(--steel-on-dark); }
.calc-result-label b { color: var(--air); }
.calc-result-label .en { color: var(--steel-on-dark); opacity: 0.8; }

.calc-result output {
  font-size: 1.375rem;
  font-weight: 800;
  font-stretch: 112%;
  font-variant-numeric: tabular-nums;
  text-align: right;
  white-space: nowrap;
}
.calc-result-main output { font-size: 1.625rem; color: var(--air); }
.calc-result .unit { font-size: 0.875rem; color: var(--steel-on-dark); white-space: nowrap; }

.calc-msg {
  grid-column: 1 / -1;
  margin: 0;
  font-weight: 600;
  color: #B71C1C;
}
.calc-msg:empty { display: none; }

.calc-note {
  margin: 20px 0 0;
  font-size: 0.875rem;
  color: var(--steel);
}
.calc-note-top { margin: 16px 0 24px; }

/* Schéma válce */
.calc-figure { margin: 0; }
.cyl { width: 100%; max-width: 320px; }
.cyl-barrel { fill: none; stroke: var(--navy); stroke-width: 3; }
.cyl-cap { fill: var(--navy); }
.cyl-chamber-a { fill: rgba(90, 180, 255, 0.35); }
.cyl-chamber-b { fill: rgba(11, 107, 203, 0.14); }
.cyl-piston { fill: var(--navy); }
.cyl-rod { fill: #C9D0D6; stroke: var(--navy); stroke-width: 2; }
.cyl-label { font: 800 22px var(--font); fill: var(--navy); text-anchor: middle; }
.cyl-dim { stroke: var(--signal); stroke-width: 1.5; fill: none; }
.cyl-dim-label { font: 700 16px var(--font); fill: var(--signal); text-anchor: middle; }
.cyl-arrow { stroke: var(--navy); stroke-width: 2.5; fill: none; stroke-linecap: round; stroke-linejoin: round; }

@media (max-width: 1000px) {
  .calc-form-cyl { grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); }
  .calc-form-cyl .calc-figure { grid-column: 1 / -1; }
}

@media (max-width: 760px) {
  .calc-form,
  .calc-form-cyl { grid-template-columns: 1fr; }
}

@media (max-width: 420px) {
  .calc-form-cyl .calc-inputs { grid-template-columns: 1fr; }
}

/* --- Převodní tabulky ----------------------------------------------------- */

.conv + .conv { margin-top: 40px; }

.conv-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px 24px;
  margin-bottom: 16px;
}
.conv-head h3 .en { margin-top: 4px; }
.conv-field { width: 200px; }

.conv-scroll {
  overflow-x: auto;
  border: 1px solid var(--line-light);
  border-radius: var(--radius);
}

.conv-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8125rem;
  font-variant-numeric: tabular-nums;
}

.conv-table th,
.conv-table td {
  padding: 9px 10px;
  border-bottom: 1px solid var(--line-light);
  border-right: 1px solid var(--line-light);
  white-space: nowrap;
  text-align: right;
}
.conv-table tr > :last-child { border-right: 0; }
.conv-table tbody tr:last-child > * { border-bottom: 0; }

.conv-table thead th {
  position: sticky;
  top: 0;
  background: var(--navy);
  color: var(--white);
  font-weight: 700;
  vertical-align: bottom;
}
.conv-table thead th .en { color: var(--steel-on-dark); }

.conv-table tbody th {
  position: sticky;
  left: 0;
  background: #F4F6F7;
  font-weight: 700;
  text-align: left;
}

.conv-table .conv-corner { left: 0; z-index: 1; }

.conv-table tbody tr:hover td,
.conv-table tbody tr:hover th { background: #EEF5FC; }

.conv-table td.is-same,
.conv-table tbody tr:hover td.is-same {
  background: var(--signal);
  color: var(--white);
  font-weight: 700;
}

/* --- Výzva na konci ------------------------------------------------------- */

.calc-cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 20px 32px;
  margin-top: 40px;
  padding: clamp(24px, 4vw, 40px);
  border-radius: var(--radius-lg);
  background: var(--navy);
  color: var(--white);
}
.calc-cta h2 { font-size: clamp(1.375rem, 1.1rem + 1vw, 1.75rem); }
.calc-cta p { margin-top: 8px; color: var(--steel-on-dark); }

@media print {
  .calc-toc, .calc-cta { display: none !important; }
  .calc-hero, .calc-results { background: none; color: #000; }
  .calc-body { background: none; }
}

/* exponenty a indexy v tabulkách tak, aby nerozhodily výšku řádku */
.conv-table sup,
.conv-table sub { font-size: 0.7em; line-height: 0; }