/* ============================================
   Revize & Projekty Elektro — Michal Čejka
   Stylesheet
   ============================================ */

/* ---------- Reset & base ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

:root {
  /* Paleta */
  --color-bg:           #F8F6F1;   /* teplá off-white */
  --color-bg-alt:       #F1EEE6;   /* o něco tmavší */
  --color-surface:      #FFFFFF;
  --color-ink:          #0E1B2C;   /* hlavní text — tmavě modrá/černá */
  --color-ink-muted:    #5A6577;
  --color-ink-light:    #8994A5;
  --color-navy:         #17355F;   /* primární modrá (zesvětlená) */
  --color-navy-dark:    #0B1F3D;
  --color-navy-light:   #2A4E82;
  --color-accent:       #C8803A;   /* průmyslový amber */
  --color-accent-dark:  #8A5420;
  --color-accent-light: #F4E3CF;
  --color-rule:         rgba(14, 27, 44, 0.12);
  --color-rule-light:   rgba(14, 27, 44, 0.06);

  /* Typografie */
  --font-display: "Instrument Serif", Georgia, "Times New Roman", serif;
  --font-body:    "Manrope", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-mono:    "JetBrains Mono", "SF Mono", Menlo, Consolas, monospace;

  /* Rozměry */
  --max-width: 1200px;
  --max-width-narrow: 780px;
  --space-unit: 8px;
}

html, body {
  background: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ---------- Typografie ---------- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 400;
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--color-ink);
}

h1 { font-size: clamp(2.2rem, 5vw, 3.75rem); }
h2 { font-size: clamp(1.75rem, 3.5vw, 2.75rem); }
h3 { font-size: clamp(1.25rem, 2vw, 1.5rem); font-weight: 500; }
h4 { font-size: 1.125rem; font-weight: 500; }

p { margin: 0 0 1rem; color: var(--color-ink-muted); line-height: 1.7; }
p.lead { font-size: 1.1875rem; color: var(--color-ink); line-height: 1.55; }

a { color: var(--color-navy); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 3px; transition: color 0.15s; }
a:hover { color: var(--color-accent-dark); }

/* Technický popisek / section label */
.label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent-dark);
  margin-bottom: 0.75rem;
  display: inline-block;
}

.label-dark {
  color: var(--color-accent);
}

/* Monospace inline (pro ČSN kódy) */
code, .mono {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: var(--color-bg-alt);
  padding: 0.1em 0.4em;
  border-radius: 3px;
  color: var(--color-ink);
}

/* ---------- Layout ---------- */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
}

.container-narrow {
  max-width: var(--max-width-narrow);
}

section {
  padding: 5rem 0;
}

@media (max-width: 768px) {
  section { padding: 3rem 0; }
  .container { padding: 0 1.25rem; }
}

.grid { display: grid; gap: 2rem; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 900px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

.rule { height: 1px; background: var(--color-rule); margin: 0; border: 0; }

/* ---------- Navigace ---------- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(248, 246, 241, 0.92);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-rule-light);
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 2rem;
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--color-ink);
}

.navbar-brand .logo {
  width: 36px;
  height: 36px;
  background: var(--color-navy);
  color: var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  border-radius: 4px;
}

.navbar-brand .brand-name {
  font-family: var(--font-display);
  font-size: 1.1875rem;
  line-height: 1;
}

.navbar-brand .brand-sub {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--color-ink-muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-top: 3px;
}

.navbar-links {
  display: flex;
  gap: 2rem;
  list-style: none;
  align-items: center;
}

.navbar-links a {
  color: var(--color-ink);
  text-decoration: none;
  font-size: 0.9375rem;
  padding: 0.5rem 0;
  position: relative;
  transition: color 0.15s;
}

.navbar-links a:hover,
.navbar-links a.active {
  color: var(--color-accent-dark);
}

.navbar-links a.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--color-accent);
}

.navbar-cta {
  background: var(--color-navy);
  color: var(--color-bg);
  padding: 0.625rem 1.25rem;
  border-radius: 4px;
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  transition: background 0.15s;
}

.navbar-cta:hover {
  background: var(--color-navy-dark);
  color: var(--color-bg);
}

.nav-toggle { display: none; background: none; border: 0; cursor: pointer; padding: 0.5rem; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--color-ink); margin: 5px 0; transition: all 0.2s; }

@media (max-width: 900px) {
  .navbar-links, .navbar-cta { display: none; }
  .nav-toggle { display: block; }
  .navbar-links.open {
    display: flex;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--color-bg);
    flex-direction: column;
    padding: 1.5rem 2rem;
    border-bottom: 1px solid var(--color-rule);
    gap: 1rem;
    align-items: flex-start;
  }
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: 6rem 0 5rem;
  overflow: hidden;
  background: var(--color-bg);
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--color-rule-light) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-rule-light) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: radial-gradient(ellipse at top right, black 20%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at top right, black 20%, transparent 70%);
  opacity: 0.6;
  pointer-events: none;
}

.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 4rem;
  align-items: center;
}

@media (max-width: 900px) {
  .hero-inner { grid-template-columns: 1fr; gap: 2.5rem; }
  .hero { padding: 3rem 0; }
}

.hero-title {
  font-size: clamp(2.25rem, 5.5vw, 4rem);
  line-height: 1.05;
  margin-bottom: 1.5rem;
  letter-spacing: -0.02em;
}

.hero-title em {
  font-style: italic;
  color: var(--color-accent-dark);
}

.hero-lead {
  font-size: 1.1875rem;
  color: var(--color-ink-muted);
  line-height: 1.55;
  margin-bottom: 2rem;
  max-width: 520px;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-rule);
}

.stat-num {
  font-family: var(--font-display);
  font-size: 2rem;
  color: var(--color-ink);
  line-height: 1;
}

.stat-lbl {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-ink-muted);
  margin-top: 0.5rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

/* Hero card */
.hero-card {
  background: var(--color-navy);
  color: var(--color-bg);
  padding: 2.5rem;
  border-radius: 6px;
  position: relative;
  overflow: hidden;
}

.hero-card::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 4px;
  background: var(--color-accent);
}

.hero-card .card-label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 1rem;
}

.hero-card h3 {
  color: var(--color-bg);
  font-size: 1.5rem;
  margin-bottom: 1.25rem;
  line-height: 1.3;
}

.hero-card ul {
  list-style: none;
  padding: 0;
}

.hero-card li {
  color: rgba(248, 246, 241, 0.8);
  padding: 0.625rem 0;
  border-bottom: 1px solid rgba(248, 246, 241, 0.1);
  font-size: 0.9375rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
}

.hero-card li:last-child { border-bottom: 0; }

.hero-card li .mono-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-accent);
  letter-spacing: 0.04em;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 1.75rem;
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 500;
  text-decoration: none;
  border-radius: 4px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.2s;
  letter-spacing: 0;
}

.btn-primary {
  background: var(--color-navy);
  color: var(--color-bg);
  border-color: var(--color-navy);
}
.btn-primary:hover {
  background: var(--color-navy-dark);
  color: var(--color-bg);
  transform: translateY(-1px);
}

.btn-accent {
  background: var(--color-accent);
  color: var(--color-navy-dark);
  border-color: var(--color-accent);
}
.btn-accent:hover {
  background: var(--color-accent-dark);
  color: var(--color-bg);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--color-ink);
  border-color: var(--color-rule);
}
.btn-outline:hover {
  background: var(--color-ink);
  color: var(--color-bg);
  border-color: var(--color-ink);
}

.btn-arrow::after {
  content: '→';
  transition: transform 0.15s;
}

.btn-arrow:hover::after {
  transform: translateX(3px);
}

/* ---------- Trust bar ---------- */
.trust-bar {
  background: var(--color-navy);
  color: var(--color-bg);
  padding: 1.25rem 0;
}

.trust-bar-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: rgba(248, 246, 241, 0.85);
}

.trust-item::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
  flex-shrink: 0;
}

@media (max-width: 700px) {
  .trust-bar-inner { flex-direction: column; align-items: flex-start; }
}

/* ---------- Section header ---------- */
.section-head {
  margin-bottom: 3.5rem;
  max-width: 720px;
}

.section-head.center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.section-head h2 {
  margin-bottom: 0.75rem;
}

.section-head p {
  font-size: 1.0625rem;
  color: var(--color-ink-muted);
}

/* ---------- Service cards ---------- */
.service-card {
  background: var(--color-surface);
  border: 1px solid var(--color-rule);
  border-radius: 6px;
  padding: 2rem;
  transition: all 0.25s;
  position: relative;
  display: flex;
  flex-direction: column;
}

.service-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(14, 27, 44, 0.06);
}

.service-card .svc-num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-accent-dark);
  letter-spacing: 0.12em;
  margin-bottom: 1.25rem;
}

.service-card h3 {
  font-size: 1.4375rem;
  margin-bottom: 0.75rem;
  line-height: 1.25;
}

.service-card p {
  font-size: 0.9375rem;
  line-height: 1.6;
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

.service-card .svc-specs {
  list-style: none;
  padding: 1rem 0 1.25rem;
  border-top: 1px solid var(--color-rule-light);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-ink-muted);
}

.service-card .svc-specs li {
  padding: 0.25rem 0;
  letter-spacing: 0.02em;
}

.service-card .svc-link {
  font-size: 0.875rem;
  color: var(--color-navy);
  text-decoration: none;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
}

.service-card .svc-link:hover {
  color: var(--color-accent-dark);
}

/* ---------- Process ---------- */
.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  border-top: 1px solid var(--color-rule);
  border-bottom: 1px solid var(--color-rule);
}

.process-step {
  padding: 2rem 1.5rem;
  border-right: 1px solid var(--color-rule);
}

.process-step:last-child {
  border-right: 0;
}

.process-num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-accent-dark);
  letter-spacing: 0.12em;
  margin-bottom: 1rem;
}

.process-step h4 {
  font-family: var(--font-display);
  font-size: 1.375rem;
  font-weight: 400;
  margin-bottom: 0.5rem;
  line-height: 1.2;
}

.process-step p {
  font-size: 0.875rem;
  line-height: 1.6;
  margin-bottom: 0;
}

@media (max-width: 900px) {
  .process-grid { grid-template-columns: repeat(2, 1fr); }
  .process-step { border-right: 0; border-bottom: 1px solid var(--color-rule); }
  .process-step:nth-child(odd) { border-right: 1px solid var(--color-rule); }
  .process-step:nth-last-child(-n+2) { border-bottom: 0; }
}

@media (max-width: 560px) {
  .process-grid { grid-template-columns: 1fr; }
  .process-step { border-right: 0 !important; border-bottom: 1px solid var(--color-rule); }
  .process-step:last-child { border-bottom: 0; }
}

/* ---------- About preview ---------- */
.about-preview {
  background: var(--color-bg-alt);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.about-img-wrap {
  position: relative;
  aspect-ratio: 4/5;
  background: var(--color-navy);
  border-radius: 6px;
  overflow: hidden;
}

.about-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.about-img-placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(248, 246, 241, 0.4);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-align: center;
  padding: 2rem;
  line-height: 1.8;
}

.about-tag {
  position: absolute;
  bottom: 1.5rem;
  left: 1.5rem;
  right: 1.5rem;
  background: rgba(12, 35, 64, 0.9);
  backdrop-filter: blur(4px);
  color: var(--color-bg);
  padding: 1rem 1.25rem;
  border-radius: 4px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
  border-left: 3px solid var(--color-accent);
}

.cert-list {
  margin-top: 1.5rem;
  list-style: none;
}

.cert-list li {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 0.875rem 0;
  border-bottom: 1px solid var(--color-rule);
}

.cert-list li:last-child { border-bottom: 0; }

.cert-badge {
  background: var(--color-navy);
  color: var(--color-accent);
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  padding: 0.375rem 0.625rem;
  border-radius: 3px;
  flex-shrink: 0;
  min-width: 70px;
  text-align: center;
}

.cert-text {
  font-size: 0.9375rem;
  color: var(--color-ink);
  line-height: 1.5;
}

@media (max-width: 900px) {
  .about-grid { grid-template-columns: 1fr; gap: 2rem; }
  .about-img-wrap { aspect-ratio: 3/2; max-width: 500px; }
}

/* ---------- References ---------- */
.ref-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.ref-card {
  background: var(--color-surface);
  border: 1px solid var(--color-rule);
  border-radius: 6px;
  padding: 1.75rem 2rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  transition: border-color 0.2s;
}

.ref-card:hover {
  border-color: var(--color-navy);
}

.ref-meta {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-accent-dark);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.ref-card h4 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 400;
  margin-bottom: 0.25rem;
}

.ref-card p {
  font-size: 0.9375rem;
  margin-bottom: 0;
  line-height: 1.55;
}

@media (max-width: 700px) {
  .ref-grid { grid-template-columns: 1fr; }
}

/* ---------- FAQ ---------- */
.faq-list {
  max-width: 780px;
  margin: 0 auto;
}

.faq-item {
  border-top: 1px solid var(--color-rule);
  padding: 1.75rem 0;
}

.faq-item:last-child {
  border-bottom: 1px solid var(--color-rule);
}

.faq-q {
  font-family: var(--font-display);
  font-size: 1.375rem;
  font-weight: 400;
  margin-bottom: 0.75rem;
  line-height: 1.3;
}

.faq-a {
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--color-ink-muted);
  margin: 0;
}

/* ---------- Contact strip / CTA ---------- */
.cta-strip {
  background: var(--color-navy);
  color: var(--color-bg);
  padding: 4.5rem 0;
  position: relative;
  overflow: hidden;
}

.cta-strip::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--color-accent);
}

.cta-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 4rem;
  align-items: center;
}

.cta-strip h2 {
  color: var(--color-bg);
  margin-bottom: 1rem;
}

.cta-strip p {
  color: rgba(248, 246, 241, 0.75);
  font-size: 1.0625rem;
  max-width: 480px;
  margin-bottom: 0;
}

.contact-block {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 6px;
  padding: 1.75rem;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.875rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.contact-item:last-child { border-bottom: 0; }

.contact-item .ci-label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--color-accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 2px;
}

.contact-item .ci-value {
  color: var(--color-bg);
  font-size: 1rem;
  text-decoration: none;
}

.contact-item .ci-value:hover {
  color: var(--color-accent);
}

@media (max-width: 800px) {
  .cta-grid { grid-template-columns: 1fr; gap: 2.5rem; }
}

/* ---------- Footer ---------- */
.footer {
  background: var(--color-navy-dark);
  color: rgba(248, 246, 241, 0.6);
  padding: 3rem 0 2rem;
  font-size: 0.875rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 2.5rem;
}

.footer h5 {
  color: var(--color-bg);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.footer a {
  color: rgba(248, 246, 241, 0.7);
  text-decoration: none;
  display: block;
  padding: 0.25rem 0;
  font-size: 0.9375rem;
}

.footer a:hover { color: var(--color-accent); }

.footer .brand {
  color: var(--color-bg);
  font-family: var(--font-display);
  font-size: 1.375rem;
  margin-bottom: 0.75rem;
}

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
}

@media (max-width: 700px) {
  .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
  .footer-bottom { flex-direction: column; }
}

/* ---------- Page header (pro podstránky) ---------- */
.page-header {
  padding: 4rem 0 3rem;
  border-bottom: 1px solid var(--color-rule);
  background: var(--color-bg);
  position: relative;
}

.page-header::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--color-rule-light) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-rule-light) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: radial-gradient(ellipse at top right, black 10%, transparent 60%);
  -webkit-mask-image: radial-gradient(ellipse at top right, black 10%, transparent 60%);
  opacity: 0.5;
  pointer-events: none;
}

.page-header-inner { position: relative; }

.page-header h1 {
  font-size: clamp(2rem, 4.5vw, 3.25rem);
  margin-bottom: 1rem;
  max-width: 760px;
}

.page-header .lead {
  max-width: 620px;
  font-size: 1.125rem;
  margin-bottom: 0;
}

.breadcrumb {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-ink-muted);
  margin-bottom: 1.25rem;
}

.breadcrumb a {
  color: var(--color-ink-muted);
  text-decoration: none;
}

.breadcrumb a:hover { color: var(--color-accent-dark); }

/* ---------- Forms ---------- */
.form-wrap {
  background: var(--color-surface);
  border: 1px solid var(--color-rule);
  border-radius: 6px;
  padding: 2.5rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
  margin-bottom: 1.25rem;
}

.form-field {
  display: flex;
  flex-direction: column;
  margin-bottom: 1.25rem;
}

.form-field label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-ink);
  margin-bottom: 0.5rem;
}

.form-field input,
.form-field textarea,
.form-field select {
  width: 100%;
  background: var(--color-bg);
  border: 1px solid var(--color-rule);
  border-radius: 4px;
  padding: 0.75rem 0.875rem;
  font-family: var(--font-body);
  font-size: 0.9375rem;
  color: var(--color-ink);
  transition: border-color 0.15s;
}

.form-field input:focus,
.form-field textarea:focus,
.form-field select:focus {
  outline: 0;
  border-color: var(--color-navy);
  background: var(--color-surface);
}

.form-field textarea {
  resize: vertical;
  min-height: 140px;
  line-height: 1.6;
  font-family: var(--font-body);
}

.form-submit {
  margin-top: 0.5rem;
}

@media (max-width: 600px) {
  .form-row { grid-template-columns: 1fr; }
  .form-wrap { padding: 1.75rem; }
}

/* ---------- Article / long-form text ---------- */
.article {
  max-width: 760px;
  margin: 0 auto;
}

.article h2 {
  margin: 2.5rem 0 1rem;
  font-size: 2rem;
}

.article h3 {
  margin: 2rem 0 0.75rem;
  font-size: 1.375rem;
}

.article p {
  font-size: 1.0625rem;
  line-height: 1.75;
  margin-bottom: 1.25rem;
}

.article ul, .article ol {
  margin: 0 0 1.5rem 1.5rem;
  color: var(--color-ink-muted);
}

.article li {
  margin-bottom: 0.5rem;
  line-height: 1.7;
}

.article blockquote {
  border-left: 3px solid var(--color-accent);
  padding: 0.5rem 0 0.5rem 1.5rem;
  margin: 2rem 0;
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-style: italic;
  color: var(--color-ink);
  line-height: 1.5;
}

/* ---------- Downloadable items (Výpočty / Studijní materiál) ---------- */
.download-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.25rem;
}

.download-card {
  background: var(--color-surface);
  border: 1px solid var(--color-rule);
  border-radius: 6px;
  padding: 1.5rem 1.75rem;
  display: flex;
  gap: 1.25rem;
  align-items: flex-start;
  transition: all 0.2s;
}

.download-card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 8px 24px rgba(14, 27, 44, 0.05);
}

.download-icon {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  background: var(--color-accent-light);
  color: var(--color-accent-dark);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 500;
  letter-spacing: 0.02em;
}

.download-body h4 {
  font-size: 1.0625rem;
  font-weight: 500;
  font-family: var(--font-body);
  margin-bottom: 0.375rem;
}

.download-body p {
  font-size: 0.875rem;
  color: var(--color-ink-muted);
  margin-bottom: 0.75rem;
  line-height: 1.5;
}

.download-body a {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-navy);
  text-decoration: none;
  font-family: var(--font-mono);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.download-body a:hover { color: var(--color-accent-dark); }

/* ---------- Info box ---------- */
.info-box {
  background: var(--color-accent-light);
  border-left: 3px solid var(--color-accent);
  padding: 1.25rem 1.5rem;
  margin: 2rem 0;
  border-radius: 0 4px 4px 0;
}

.info-box .label {
  margin-bottom: 0.5rem;
}

.info-box p {
  color: var(--color-ink);
  margin-bottom: 0;
  font-size: 0.9375rem;
  line-height: 1.6;
}

/* ---------- Utilities ---------- */
.text-center { text-align: center; }
.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.mt-3 { margin-top: 3rem; }
.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }
.mb-3 { margin-bottom: 3rem; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* ---------- Print ---------- */
@media print {
  .navbar, .cta-strip, .footer { display: none; }
  body { background: white; color: black; }
}

/* ============================================
   REFERENČNÍ LOGA — karty s logem nad textem
   ============================================ */
.ref-card {
  padding-top: 2rem;
}

.ref-logo {
  height: 48px;
  width: auto;
  max-width: 160px;
  object-fit: contain;
  object-position: left center;
  margin-bottom: 1rem;
  filter: grayscale(100%) opacity(0.85);
  transition: filter 0.25s;
}

.ref-card:hover .ref-logo {
  filter: grayscale(0%) opacity(1);
}

/* Velké barevné firemní logo Michala */
.mc-logo-wrap {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 1.5rem 2rem;
  background: var(--color-surface);
  border: 1px solid var(--color-rule);
  border-left: 3px solid var(--color-accent);
  border-radius: 4px;
  margin-bottom: 2rem;
}

.mc-logo-wrap img {
  width: 90px;
  height: 90px;
  object-fit: contain;
  flex-shrink: 0;
}

.mc-logo-wrap .mc-logo-text {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-ink-muted);
  letter-spacing: 0.08em;
  line-height: 1.6;
  text-transform: uppercase;
}

.mc-logo-wrap .mc-logo-text strong {
  color: var(--color-ink);
  font-weight: 500;
}

@media (max-width: 500px) {
  .mc-logo-wrap { padding: 1.25rem; gap: 1rem; }
  .mc-logo-wrap img { width: 70px; height: 70px; }
}

/* ============================================
   KALKULÁTOR — integrovaný styl (.ko- třídy)
   Přepis originálního CSS tak, aby seděl na design webu
   ============================================ */
.ko-calc {
  font-family: var(--font-body);
  max-width: 820px;
  margin: 0 auto;
  color: var(--color-ink);
  line-height: 1.5;
}

.ko-calc * { box-sizing: border-box; }

.ko-header {
  text-align: center;
  margin-bottom: 2rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--color-rule);
}

.ko-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent-dark);
  margin-bottom: 0.75rem;
}

.ko-title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3.5vw, 2.25rem);
  font-weight: 400;
  color: var(--color-ink);
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.ko-subtitle {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-ink-muted);
  margin-top: 0.5rem;
  letter-spacing: 0.06em;
}

.ko-card {
  background: var(--color-surface);
  border: 1px solid var(--color-rule);
  border-radius: 6px;
  overflow: hidden;
  margin-bottom: 1.25rem;
  box-shadow: 0 2px 8px rgba(14, 27, 44, 0.03);
}

.ko-sec {
  background: var(--color-navy);
  padding: 0.9rem 1.5rem;
  border-bottom: 3px solid var(--color-accent);
}

.ko-sec h2 {
  font-family: var(--font-mono);
  color: var(--color-bg);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin: 0;
  line-height: 1.4;
}

.ko-rows {
  padding: 0.5rem 1.5rem 1rem;
}

.ko-row {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--color-rule-light);
}

.ko-row:last-child { border-bottom: none; }

.ko-row label {
  flex: 1;
  font-size: 0.875rem;
  color: var(--color-ink);
  font-weight: 400;
  font-family: var(--font-body);
}

.ko-row .ko-input-wrap {
  width: 260px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.ko-row select,
.ko-row input {
  width: 100%;
  border: 1px solid var(--color-rule);
  border-radius: 4px;
  padding: 0.5rem 0.75rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-ink);
  background: var(--color-bg);
  outline: none;
  transition: all 0.15s;
  font-family: var(--font-mono);
}

.ko-row select:focus,
.ko-row input:focus {
  border-color: var(--color-navy);
  background: var(--color-surface);
  box-shadow: 0 0 0 3px rgba(23, 53, 95, 0.12);
}

.ko-row input {
  text-align: right;
}

.ko-row input:disabled,
.ko-row select:disabled {
  background: var(--color-bg-alt);
  color: var(--color-ink-light);
  cursor: not-allowed;
}

.ko-unit {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-ink-muted);
  min-width: 32px;
  text-align: left;
  letter-spacing: 0.02em;
}

.ko-hint {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-accent-dark);
  padding: 0.5rem 1.5rem 0.75rem;
  letter-spacing: 0.02em;
  background: var(--color-accent-light);
  border-top: 1px solid var(--color-rule-light);
}

.ko-btn-wrap {
  text-align: center;
  margin: 2rem 0;
}

.ko-btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--color-navy);
  color: var(--color-bg);
  border: 1px solid var(--color-navy);
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  padding: 0.9rem 2.25rem;
  border-radius: 4px;
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(23, 53, 95, 0.2);
  transition: all 0.2s;
}

.ko-btn:hover {
  background: var(--color-navy-dark);
  border-color: var(--color-navy-dark);
  box-shadow: 0 6px 16px rgba(23, 53, 95, 0.3);
  transform: translateY(-1px);
}

.ko-btn:active { transform: translateY(0); }

.ko-btn-pdf {
  background: var(--color-accent);
  color: var(--color-navy-dark);
  border-color: var(--color-accent);
  box-shadow: 0 4px 12px rgba(200, 128, 58, 0.25);
}

.ko-btn-pdf:hover {
  background: var(--color-accent-dark);
  color: var(--color-bg);
  border-color: var(--color-accent-dark);
  box-shadow: 0 6px 16px rgba(138, 84, 32, 0.3);
}

.ko-btn-pdf svg {
  vertical-align: middle;
}

.ko-results {
  display: none;
}

.ko-results.visible {
  display: block;
  animation: ko-fade-in 0.3s ease-out;
}

@keyframes ko-fade-in {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

.ko-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  padding: 1.25rem 1.5rem;
}

.ko-stat {
  background: var(--color-bg);
  border: 1px solid var(--color-rule-light);
  border-radius: 4px;
  padding: 1rem;
  text-align: center;
}

.ko-stat-label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--color-ink-muted);
  margin-bottom: 0.375rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.ko-stat-val {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 500;
  color: var(--color-ink);
}

.ko-summary {
  padding: 0 1.5rem 1.25rem;
}

.ko-sum-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.625rem 0;
  border-bottom: 1px solid var(--color-rule-light);
}

.ko-sum-row:last-child { border-bottom: none; }

.ko-sum-label {
  font-size: 0.875rem;
  color: var(--color-ink);
  font-weight: 400;
}

.ko-pass {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 500;
  color: #2D7A3F;
  letter-spacing: 0.02em;
}

.ko-fail {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 500;
  color: #B91C1C;
  letter-spacing: 0.02em;
}

.ko-na {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--color-ink-light);
  font-style: italic;
  letter-spacing: 0.02em;
}

.ko-footer {
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--color-ink-muted);
  margin-top: 1.5rem;
  padding-bottom: 0.5rem;
  letter-spacing: 0.04em;
}

@media (max-width: 640px) {
  .ko-row {
    flex-direction: column;
    align-items: stretch;
    gap: 0.375rem;
  }
  .ko-row .ko-input-wrap { width: 100%; }
  .ko-grid { padding: 1rem; }
}