/* ==========================================================================
   VENTONIQ – Poradna (/poradna/, /pruvodce-zavadami/ a návody)
   Doplňuje style.css, používá stejné barvy a písmo.
   ========================================================================== */

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

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

.page-hero h1 {
  max-width: 20ch;
  font-size: clamp(2rem, 1.2rem + 3vw, 3.25rem);
  line-height: 1.06;
  letter-spacing: -0.015em;
  text-wrap: balance;
}

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

/* Přehled závad */
.fault-toc {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px 40px;
  margin-top: 40px;
  padding-top: 32px;
  border-top: 1px solid var(--line-dark);
}

.fault-toc-title {
  margin-bottom: 8px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--air);
}

.fault-toc ul { margin: 0; padding: 0; list-style: none; }

.fault-toc a {
  display: block;
  padding: 8px 0;
  border-bottom: 1px solid var(--line-dark);
  color: var(--white);
  font-weight: 600;
  text-decoration: none;
}
.fault-toc a:hover { color: var(--air); }

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

/* --- Obsah ---------------------------------------------------------------- */

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

.fault-warning {
  margin-bottom: 40px;
  padding: 16px 20px;
  border-left: 4px solid #E0A100;
  border-radius: 0 var(--radius) var(--radius) 0;
  background: #FFF3C4;
  color: #4A3800;
}

.fault-group + .fault-group { margin-top: clamp(48px, 6vw, 72px); }
.fault-group > h2 { margin-bottom: 24px; }

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

.fault h3 { margin-bottom: 24px; font-size: clamp(1.25rem, 1.05rem + 0.8vw, 1.625rem); }

.fault-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 24px 48px;
}

.fault h4 {
  margin: 0 0 12px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--steel);
}

.fault ul,
.fault ol { margin: 0; padding: 0; list-style: none; }

.fault li {
  position: relative;
  padding: 8px 0 8px 28px;
  border-top: 1px solid var(--line-light);
}
.fault li:first-child { border-top: 0; padding-top: 0; }

/* příčiny: značka ve tvaru čárky z loga */
.fault ul li::before {
  content: "";
  position: absolute;
  left: 4px; top: 13px;
  width: 5px; height: 14px;
  border-radius: 3px;
  background: var(--steel);
  opacity: 0.5;
}
.fault ul li:first-child::before { top: 5px; }

/* postup: čísla kroků */
.fault ol { counter-reset: krok; }
.fault ol li { counter-increment: krok; }
.fault ol li::before {
  content: counter(krok);
  position: absolute;
  left: 0; top: 9px;
  display: grid;
  place-items: center;
  width: 20px; height: 20px;
  border-radius: 50%;
  background: var(--signal);
  color: var(--white);
  font-size: 0.75rem;
  font-weight: 700;
  line-height: 1;
}
.fault ol li:first-child::before { top: 1px; }

.fault-note {
  margin-top: 16px;
  font-size: 0.9375rem;
  color: var(--steel);
}

.fault-service {
  margin-top: 24px;
  padding: 14px 18px;
  border-radius: var(--radius);
  background: #EEF5FC;
}
.fault-service strong { color: var(--signal-dark); }

@media (max-width: 760px) { .fault-grid { grid-template-columns: 1fr; } }

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

.fault-cta,
.page-cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 20px 32px;
  margin-top: 48px;
  padding: clamp(24px, 4vw, 40px);
  border-radius: var(--radius-lg);
  background: var(--navy);
  color: var(--white);
}
.fault-cta h2,
.page-cta h2 { font-size: clamp(1.375rem, 1.1rem + 1vw, 1.75rem); }
.fault-cta p,
.page-cta p { max-width: 56ch; margin-top: 8px; color: var(--steel-on-dark); }

.fault-cta-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 24px;
}
.fault-cta-mail { color: var(--white); font-weight: 600; }
.fault-cta-mail:hover { color: var(--air); }

@media print {
  .fault-toc, .fault-cta, .page-cta, .breadcrumb { display: none !important; }
  .page-hero { background: none; color: #000; }
  .fault-body, .article-body { background: none; }
}

/* ==========================================================================
   Společné prvky Poradny
   ========================================================================== */

/* Drobečková navigace v úvodu */
.breadcrumb {
  margin: 0 0 20px;
  padding: 0;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 4px 0;
  font-size: 0.875rem;
  color: var(--steel-on-dark);
}
.breadcrumb li + li::before { content: "›"; margin: 0 10px; color: var(--steel-on-dark); }
.breadcrumb a { color: var(--steel-on-dark); }
.breadcrumb a:hover { color: var(--white); }

/* --- Rozcestník /poradna/ -------------------------------------------------- */

.guide-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.guide-card a {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 28px 28px 32px;
  border: 1px solid transparent;
  border-radius: var(--radius-lg);
  background: var(--white);
  color: var(--navy);
  text-decoration: none;
  transition: border-color 0.2s;
}
.guide-card a:hover { border-color: var(--signal); color: var(--navy); }

.guide-tag {
  margin-bottom: 20px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--signal);
}

.guide-card h2 { margin-bottom: 12px; font-size: 1.375rem; }
.guide-card p { color: var(--steel); }

.guide-more {
  margin-top: auto;
  padding-top: 20px;
  font-weight: 700;
  color: var(--signal);
}

/* --- Článek --------------------------------------------------------------- */

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

.article {
  padding: clamp(24px, 5vw, 56px);
  background: var(--white);
  border-radius: var(--radius-lg);
}

.prose > * { max-width: 72ch; }
.prose > .table-scroll,
.prose > figure,
.prose > .symbols { max-width: none; }

.prose h2 {
  margin: 48px 0 16px;
  font-size: clamp(1.375rem, 1.1rem + 1vw, 1.875rem);
}
.prose h2:first-child { margin-top: 0; }

.prose h3 { margin: 32px 0 12px; font-size: 1.1875rem; }

.prose p,
.prose ul,
.prose ol { margin: 0 0 16px; }

.prose ul,
.prose ol { padding-left: 1.4em; }
.prose li { margin-bottom: 6px; }
.prose li::marker { color: var(--signal); font-weight: 700; }

.prose strong { font-weight: 700; }

.tip,
.warn {
  margin: 24px 0;
  padding: 16px 20px;
  border-left: 4px solid var(--signal);
  border-radius: 0 var(--radius) var(--radius) 0;
  background: #EEF5FC;
}
.warn { border-left-color: #E0A100; background: #FFF3C4; color: #4A3800; }
.tip p:last-child,
.warn p:last-child { margin-bottom: 0; }

/* Tabulky s údaji */
.table-scroll {
  margin: 20px 0 28px;
  overflow-x: auto;
  border: 1px solid var(--line-light);
  border-radius: var(--radius);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9375rem;
  font-variant-numeric: tabular-nums;
}
.data-table caption {
  padding: 12px 14px;
  caption-side: top;
  text-align: left;
  font-weight: 700;
  background: #F4F6F7;
  border-bottom: 1px solid var(--line-light);
}
.data-table th,
.data-table td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--line-light);
  text-align: left;
  vertical-align: top;
}
.data-table thead th {
  background: var(--navy);
  color: var(--white);
  font-size: 0.8125rem;
  font-weight: 700;
  white-space: nowrap;
}
.data-table tbody tr:last-child > * { border-bottom: 0; }
.data-table tbody th { font-weight: 700; white-space: nowrap; }
.data-table td.num { white-space: nowrap; }

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

/* Obrázky (SVG schémata) */
.figure {
  margin: 24px 0 32px;
  padding: 24px;
  border: 1px solid var(--line-light);
  border-radius: var(--radius);
  background: #FAFBFC;
}
.figure svg { width: 100%; height: auto; max-width: 720px; margin-inline: auto; }
.figure figcaption { margin-top: 12px; font-size: 0.875rem; color: var(--steel); text-align: center; }

/* Prvky výkresů */
.d-body { fill: #E9ECEE; stroke: var(--navy); stroke-width: 2.5; }
.d-cap { fill: var(--navy); }
.d-rod { fill: #C9D0D6; stroke: var(--navy); stroke-width: 2; }
.d-thread { stroke: var(--navy); stroke-width: 1.5; fill: none; }
.d-hidden { fill: none; stroke: var(--steel); stroke-width: 1.5; stroke-dasharray: 5 4; }
.d-dim { stroke: var(--signal); stroke-width: 1.5; fill: none; }
.d-ext { stroke: var(--signal); stroke-width: 1; stroke-dasharray: 3 3; fill: none; }
.d-label { font: 700 16px var(--font); fill: var(--signal); text-anchor: middle; }
.d-text { font: 600 13px var(--font); fill: var(--steel); text-anchor: middle; }
.d-arrowhead { fill: var(--signal); }

/* Schématické značky ventilů */
.symbols {
  display: grid;
  /* značka 5/3 je širší (3 polohy), proto dostane víc místa */
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) minmax(0, 1.5fr);
  gap: 16px;
  margin: 24px 0 32px;
}
.symbols .figure { margin: 0; }
@media (max-width: 900px) { .symbols { grid-template-columns: 1fr 1fr; } .symbols .figure:last-child { grid-column: 1 / -1; } }
@media (max-width: 560px) { .symbols { grid-template-columns: 1fr; } }
.symbols figcaption strong { display: block; color: var(--navy); font-size: 0.9375rem; }

.v-box { fill: var(--white); stroke: var(--navy); stroke-width: 2; }
.v-line { stroke: var(--navy); stroke-width: 2; fill: none; }
.v-port { stroke: var(--navy); stroke-width: 2; }
.v-arrowhead { fill: var(--navy); }
.v-act { fill: none; stroke: var(--navy); stroke-width: 2; stroke-linejoin: round; }
.v-num { font: 700 13px var(--font); fill: var(--signal); text-anchor: middle; }

/* Související odkazy */
.related {
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid var(--line-light);
}
.related h2 { margin: 0 0 16px; font-size: 1.25rem; }
.related ul { margin: 0; padding: 0; list-style: none; display: flex; flex-wrap: wrap; gap: 10px; }
.related a {
  display: inline-block;
  padding: 8px 16px;
  border: 1.5px solid var(--line-light);
  border-radius: var(--radius);
  color: var(--navy);
  font-weight: 600;
  font-size: 0.9375rem;
  text-decoration: none;
}
.related a:hover { border-color: var(--signal); color: var(--signal); }