*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

/* ── DARK THEME (default) ── */
:root {
  --blue:         #3B8FE0;
  --blue-hover:   #4fa0f0;
  --blue-dim:     rgba(59,143,224,.18);
  --blue-dimmer:  rgba(59,143,224,.10);

  --bg-page:      #0B1F3A;
  --bg-card:      #0F2847;
  --bg-card-2:    #162F50;
  --bg-nav:       rgba(11,31,58,.97);
  --bg-strip:     #0F2847;

  --text:         #F5F2EC;
  --text-muted:   rgba(245,242,236,.60);
  --text-dim:     rgba(245,242,236,.32);
  --text-dimmer:  rgba(245,242,236,.18);

  --border:       rgba(245,242,236,.09);
  --border-mid:   rgba(245,242,236,.20);
  --border-blue:  rgba(59,143,224,.35);

  --accent-bg:    rgba(59,143,224,.12);
  --accent-glow:  rgba(59,143,224,.25);
  --section-alt:  #0D2444;

  --max: 1100px;
}

/* ── LIGHT THEME ── */
[data-theme="light"] {
  --bg-page:      #EDF2FA;
  --bg-card:      #FFFFFF;
  --bg-card-2:    #F0F5FF;
  --bg-nav:       rgba(237,242,250,.97);
  --bg-strip:     #FFFFFF;

  --text:         #0B1F3A;
  --text-muted:   rgba(11,31,58,.62);
  --text-dim:     rgba(11,31,58,.40);
  --text-dimmer:  rgba(11,31,58,.18);

  --border:       rgba(11,31,58,.11);
  --border-mid:   rgba(11,31,58,.22);
  --border-blue:  rgba(59,143,224,.50);

  --accent-bg:    rgba(59,143,224,.10);
  --accent-glow:  rgba(59,143,224,.20);
  --section-alt:  #E2EAF6;
}

html { scroll-behavior: smooth; }
body { font-family: 'Inter', sans-serif; background: var(--bg-page); color: var(--text); min-height: 100vh; overflow-x: hidden; transition: background .3s, color .3s; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

/* CANVAS */
#networkBg { position: fixed; top: 0; left: 0; width: 100%; height: 100%; pointer-events: none; z-index: 0; }

/* NAV */
.nav {
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 48px; height: 80px;
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 100;
  background: var(--bg-nav);
  backdrop-filter: blur(12px);
  transition: background .3s, border-color .3s;
}
.nav-logo { font-family: 'Montserrat', sans-serif; font-size: 22px; font-weight: 800; letter-spacing: .05em; text-transform: uppercase; cursor: pointer; }
.nav-logo span { color: var(--blue); }
.nav-links { display: flex; gap: 28px; list-style: none; }
.nav-links a { font-size: 15px; font-weight: 400; color: var(--text-muted); transition: color .2s; }
.nav-links a:hover, .nav-links a.active { color: var(--text); }
.nav-right { display: flex; align-items: center; gap: 12px; }
.nav-cta { font-size: 15px; font-weight: 600; color: #fff; background: var(--blue); border: none; padding: 10px 24px; border-radius: 4px; cursor: pointer; transition: background .2s; text-decoration: none; display: inline-block; }
.nav-cta:hover { background: var(--blue-hover); }
.theme-toggle {
  width: 38px; height: 38px; border-radius: 50%;
  background: var(--bg-card); border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; transition: background .2s, border-color .2s;
  flex-shrink: 0;
}
.theme-toggle:hover { border-color: var(--border-blue); background: var(--bg-card-2); }
.theme-toggle svg { width: 17px; height: 17px; stroke: var(--text-muted); fill: none; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; transition: stroke .2s; }
.theme-toggle:hover svg { stroke: var(--text); }
.nav-hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 4px; background: none; border: none; }
.nav-hamburger span { display: block; width: 22px; height: 2px; background: var(--text); border-radius: 2px; transition: all .3s; }

/* FOOTER */
.footer { background: var(--bg-card); border-top: 1px solid var(--border); padding: 36px 48px; position: relative; z-index: 1; transition: background .3s; }
.footer-inner { max-width: var(--max); margin: 0 auto; display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 16px; }
.footer-logo { font-family: 'Montserrat', sans-serif; font-size: 17px; font-weight: 800; letter-spacing: .05em; text-transform: uppercase; }
.footer-logo span { color: var(--blue); }
.footer-info { font-size: 14px; color: var(--text-dim); line-height: 1.8; text-align: center; }
.footer-links { display: flex; gap: 20px; }
.footer-links a { font-size: 13px; color: var(--text-dim); transition: color .2s; }
.footer-links a:hover { color: var(--text-muted); }

/* LAYOUT */
.section { padding: 72px 48px; max-width: var(--max); margin: 0 auto; position: relative; z-index: 1; }
.section-bg { position: relative; z-index: 1; }
.sec-eyebrow { display: inline-flex; align-items: center; gap: 10px; font-size: 12px; font-weight: 600; letter-spacing: .12em; text-transform: uppercase; color: var(--blue); margin-bottom: 14px; }
.sec-eyebrow-line { width: 22px; height: 1px; background: var(--blue); flex-shrink: 0; }
.sec-title { font-family: 'Montserrat', sans-serif; font-size: 38px; font-weight: 800; letter-spacing: -.01em; color: var(--text); margin-bottom: 8px; line-height: 1.15; }
.sec-sub { font-size: 17px; color: var(--text-muted); line-height: 1.75; margin-bottom: 44px; max-width: 500px; }
.sec-divider { border: none; border-top: 1px solid var(--border); position: relative; z-index: 1; }

/* BUTTONS */
.btn-primary { font-size: 14px; font-weight: 600; color: var(--bg-page); background: var(--text); border: none; padding: 13px 28px; border-radius: 4px; cursor: pointer; display: inline-block; transition: opacity .2s; text-decoration: none; }
.btn-primary:hover { opacity: .88; }
.btn-secondary { font-size: 14px; font-weight: 500; color: var(--text-muted); background: none; border: 1px solid var(--border-mid); padding: 12px 24px; border-radius: 4px; cursor: pointer; display: inline-block; transition: border-color .2s, color .2s; text-decoration: none; }
.btn-secondary:hover { border-color: var(--text-muted); color: var(--text); }

/* HERO */
.hero { padding: 48px 48px 80px; max-width: var(--max); margin: 0 auto; position: relative; z-index: 1; }
.hero-eyebrow { display: inline-flex; align-items: center; gap: 10px; font-size: 12px; font-weight: 600; letter-spacing: .12em; text-transform: uppercase; color: var(--blue); margin-bottom: 24px; }
.hero-eyebrow-line { width: 22px; height: 1px; background: var(--blue); display: inline-block; }
.hero-title { font-family: 'Montserrat', sans-serif; font-size: clamp(36px, 5vw, 56px); font-weight: 800; letter-spacing: -.02em; line-height: 1.1; color: var(--text); margin-bottom: 20px; max-width: 620px; }
.hero-title em { font-style: normal; color: var(--blue); }
.hero-sub { font-size: 18px; color: var(--text-muted); line-height: 1.75; margin-bottom: 36px; max-width: 500px; }
.hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin-bottom: 72px; }
.hero-stats { display: flex; gap: 48px; flex-wrap: wrap; }
.stat-num { font-family: 'Montserrat', sans-serif; font-size: 36px; font-weight: 800; color: var(--text); line-height: 1; }
.stat-num sup { font-size: 18px; color: var(--blue); }
.stat-label { font-size: 12px; font-weight: 600; letter-spacing: .06em; text-transform: uppercase; color: var(--text-muted); margin-top: 6px; line-height: 1.4; }

/* SERVICES STRIP */
.services-strip { position: relative; z-index: 1; background: var(--bg-strip); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); transition: background .3s; }
.services-strip-inner { max-width: var(--max); margin: 0 auto; padding: 32px 48px; display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.strip-label { font-size: 13px; font-weight: 600; letter-spacing: .1em; text-transform: uppercase; color: var(--text-dimmer); margin-right: 12px; }
.chip { font-size: 15px; color: var(--text-muted); padding: 9px 20px; border: 1px solid var(--border); border-radius: 4px; transition: background .3s, border-color .3s; }
.chip.hi { color: var(--blue); border-color: rgba(59,143,224,.35); background: rgba(59,143,224,.07); }

/* SERVICE CARDS */
.primary-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-bottom: 14px; }
.secondary-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 14px; }
.svc-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: 8px; padding: 28px; cursor: pointer; transition: border-color .25s, background .25s, transform .2s; position: relative; overflow: hidden; }
.svc-card::before { content: ''; position: absolute; inset: 0; background: linear-gradient(135deg, rgba(59,143,224,.05) 0%, transparent 60%); opacity: 0; transition: opacity .3s; pointer-events: none; }
.svc-card:hover { border-color: var(--border-blue); background: var(--bg-card-2); transform: translateY(-2px); }
.svc-card:hover::before { opacity: 1; }
.svc-card.primary { border-left: 3px solid var(--blue); }
.svc-card.secondary { border-left: 3px solid var(--border-mid); }
.svc-icon { width: 38px; height: 38px; border-radius: 6px; background: var(--blue-dimmer); border: 1px solid var(--blue-dim); display: flex; align-items: center; justify-content: center; margin-bottom: 18px; }
.svc-icon svg { width: 18px; height: 18px; stroke: var(--blue); fill: none; stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; }
.svc-card.secondary .svc-icon { background: var(--bg-card-2); border-color: var(--border); }
.svc-card.secondary .svc-icon svg { stroke: var(--text-muted); }
.svc-badge { position: absolute; top: 18px; right: 18px; font-size: 10px; font-weight: 600; letter-spacing: .06em; text-transform: uppercase; padding: 2px 8px; border-radius: 3px; }
.badge-p { background: var(--blue-dimmer); color: var(--blue); border: 1px solid var(--blue-dim); }
.badge-s { background: var(--bg-card-2); color: var(--text-dim); border: 1px solid var(--border); }
.svc-title { font-family: 'Montserrat', sans-serif; font-size: 18px; font-weight: 700; color: var(--text); margin-bottom: 8px; }
.svc-desc { font-size: 15px; color: var(--text-muted); line-height: 1.65; margin-bottom: 16px; }
.svc-pills { display: flex; flex-wrap: wrap; gap: 5px; margin-bottom: 20px; }
.svc-pill { font-size: 12px; color: var(--text-dim); padding: 3px 9px; border: 1px solid var(--border); border-radius: 3px; }
.svc-card.primary .svc-pill { color: var(--blue); border-color: var(--blue-dim); opacity: .8; }
.svc-link { display: inline-flex; align-items: center; gap: 6px; font-size: 14px; font-weight: 500; color: var(--blue); transition: gap .2s; }
.svc-link::after { content: ''; position: absolute; inset: 0; z-index: 1; }
.svc-card.secondary .svc-link { color: var(--text-muted); }
.svc-card:hover .svc-link { gap: 10px; }
.divider-label { font-size: 11px; font-weight: 600; letter-spacing: .1em; text-transform: uppercase; color: var(--text-dimmer); display: flex; align-items: center; gap: 12px; margin-bottom: 14px; }
.divider-label::before, .divider-label::after { content: ''; flex: 1; height: 1px; background: var(--border); }

/* PROJECT CARDS */
.filters { display: flex; gap: 7px; flex-wrap: wrap; margin-bottom: 36px; }
.filter-btn { font-size: 13px; font-weight: 500; padding: 7px 16px; border-radius: 3px; border: 1px solid var(--border); background: transparent; color: var(--text-muted); cursor: pointer; transition: all .2s; }
.filter-btn:hover { border-color: var(--border-mid); color: var(--text); }
.filter-btn.active { background: var(--blue); border-color: var(--blue); color: #fff; font-weight: 600; }
.proj-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 14px; }
.proj-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: 8px; overflow: hidden; transition: border-color .25s, transform .2s, background .3s; }
.proj-card:hover { border-color: var(--border-blue); transform: translateY(-2px); }
.proj-card.hidden { display: none; }
.proj-thumb { height: 120px; position: relative; display: flex; align-items: center; justify-content: center; }
.thumb-obec      { background: linear-gradient(135deg, #0d2540, #1a3d5c); }
.thumb-prumysl   { background: linear-gradient(135deg, #1a2535, #2a3d50); }
.thumb-developer { background: linear-gradient(135deg, #0f2238, #1c3850); }
.thumb-it        { background: linear-gradient(135deg, #0e1f38, #162d4a); }
[data-theme="light"] .thumb-obec      { background: linear-gradient(135deg, #1a4a7a, #2a6aaa); }
[data-theme="light"] .thumb-prumysl   { background: linear-gradient(135deg, #2a3f60, #3a5880); }
[data-theme="light"] .thumb-developer { background: linear-gradient(135deg, #1a3a6a, #2a5590); }
[data-theme="light"] .thumb-it        { background: linear-gradient(135deg, #1e3560, #2d4e85); }
.thumb-ico { width: 40px; height: 40px; border-radius: 7px; background: rgba(59,143,224,.18); border: 1px solid rgba(59,143,224,.3); display: flex; align-items: center; justify-content: center; }
.thumb-ico svg { width: 20px; height: 20px; stroke: #fff; fill: none; stroke-width: 1.5; stroke-linecap: round; stroke-linejoin: round; }
.proj-sector { position: absolute; top: 10px; left: 10px; font-size: 10px; font-weight: 600; letter-spacing: .06em; text-transform: uppercase; padding: 2px 8px; border-radius: 3px; }
.sb-obec      { background: rgba(29,158,117,.25); color: #3DB88A; border: 1px solid rgba(29,158,117,.3); }
.sb-prumysl   { background: rgba(239,159,39,.2); color: #D4880A; border: 1px solid rgba(239,159,39,.3); }
.sb-developer { background: rgba(59,143,224,.2); color: #2478D0; border: 1px solid rgba(59,143,224,.3); }
.sb-it        { background: rgba(120,100,220,.2); color: #7060CC; border: 1px solid rgba(120,100,220,.3); }
[data-theme="dark"] .sb-obec      { color: #5DCAA5; }
[data-theme="dark"] .sb-prumysl   { color: #EF9F27; }
[data-theme="dark"] .sb-developer { color: var(--blue); }
[data-theme="dark"] .sb-it        { color: #AFA9EC; }
.proj-year { position: absolute; top: 10px; right: 10px; font-size: 10px; color: rgba(245,242,236,.5); }
.proj-body { padding: 18px; }
.proj-title { font-family: 'Montserrat', sans-serif; font-size: 14px; font-weight: 700; color: var(--text); margin-bottom: 4px; line-height: 1.25; }
.proj-loc { font-size: 11px; font-weight: 600; letter-spacing: .05em; color: var(--blue); margin-bottom: 8px; text-transform: uppercase; }
.proj-desc { font-size: 14px; color: var(--text-muted); line-height: 1.6; margin-bottom: 10px; }
.proj-tags { display: flex; flex-wrap: wrap; gap: 4px; margin-bottom: 12px; }
.proj-tag { font-size: 11px; padding: 2px 6px; border-radius: 2px; background: var(--bg-card-2); color: var(--text-dim); border: 1px solid var(--border); }
.proj-stats { display: flex; gap: 14px; padding-top: 10px; border-top: 1px solid var(--border); }
.ps-num { font-family: 'Montserrat', sans-serif; font-size: 13px; font-weight: 700; color: var(--text); }
.ps-lbl { font-size: 11px; color: var(--text-dim); margin-top: 2px; }
.show-more { display: flex; justify-content: center; margin-top: 32px; }

/* CTA BANNER */
.cta-banner { position: relative; z-index: 1; background: var(--bg-card); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); transition: background .3s; }
.cta-inner { max-width: var(--max); margin: 0 auto; padding: 56px 48px; display: flex; align-items: center; justify-content: space-between; gap: 36px; }
.cta-title { font-family: 'Montserrat', sans-serif; font-size: 26px; font-weight: 800; letter-spacing: -.01em; margin-bottom: 8px; color: var(--text); }
.cta-sub { font-size: 16px; color: var(--text-muted); line-height: 1.7; max-width: 460px; }
.cta-actions { display: flex; gap: 10px; flex-shrink: 0; }

/* CONTACT FORM */
.contact-form { max-width: 620px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.form-group { display: flex; flex-direction: column; gap: 6px; margin-bottom: 14px; }
.form-group label { font-size: 12px; font-weight: 600; letter-spacing: .06em; text-transform: uppercase; color: var(--text-muted); }
.form-group input, .form-group textarea { background: var(--bg-card); border: 1.5px solid var(--border-mid); border-radius: 4px; padding: 11px 14px; color: var(--text); font-family: 'Inter', sans-serif; font-size: 15px; transition: border-color .2s, background .3s; outline: none; resize: vertical; }
.form-group input:focus, .form-group textarea:focus { border-color: var(--blue); box-shadow: 0 0 0 3px var(--accent-glow); }
.form-group input::placeholder, .form-group textarea::placeholder { color: var(--text-dimmer); }

/* ── CONTRAST ELEMENTS ── */

/* Eyebrow jako pill */
.sec-eyebrow, .hero-eyebrow {
  background: var(--accent-bg);
  border: 1px solid var(--border-blue);
  border-radius: 20px;
  padding: 4px 12px 4px 10px;
}

/* Nadpis sekce s akcentovou čárou */
.sec-title::after {
  content: '';
  display: block;
  width: 40px;
  height: 3px;
  background: var(--blue);
  border-radius: 2px;
  margin-top: 10px;
}

/* Alternující pozadí sekcí */
.section-alt-bg {
  background: var(--section-alt);
  transition: background .3s;
}

/* Statistiky s akcentem */
.hero-stats { padding: 32px 0; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.hero-stat-item { position: relative; padding-left: 16px; }
.hero-stat-item::before { content: ''; position: absolute; left: 0; top: 4px; bottom: 4px; width: 3px; background: var(--blue); border-radius: 2px; }

/* Primární karty — top accent */
.svc-card.primary::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--blue), transparent);
  border-radius: 8px 8px 0 0;
  pointer-events: none;
}

/* CTA s modrým gradientem */
.cta-banner {
  background: linear-gradient(135deg, var(--bg-card) 0%, color-mix(in srgb, var(--blue) 12%, var(--bg-card)) 100%) !important;
  border-top: 1px solid var(--border-blue) !important;
}
.cta-title { color: var(--text); }

/* Hero title — "na desetiletí" glow efekt */
.hero-title em {
  position: relative;
  display: inline-block;
}
.hero-title em::after {
  content: '';
  position: absolute;
  bottom: -2px; left: 0; right: 0;
  height: 2px;
  background: var(--blue);
  border-radius: 2px;
  opacity: .6;
}

/* Výraznější filter tlačítka */
.filter-btn.active {
  box-shadow: 0 0 0 3px var(--accent-glow);
}

/* Výraznější stat čísla */
.stat-num {
  text-shadow: 0 0 40px var(--accent-glow);
}

/* CONTACT INFO */
.contact-info { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 36px; }
.contact-item { display: inline-flex; align-items: center; gap: 10px; font-size: 15px; font-weight: 500; color: var(--text-muted); background: var(--bg-card); border: 1px solid var(--border); border-radius: 6px; padding: 12px 18px; transition: border-color .2s, color .2s; text-decoration: none; }
.contact-item svg { width: 16px; height: 16px; stroke: var(--blue); fill: none; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; flex-shrink: 0; }
.contact-item:hover { border-color: var(--border-blue); color: var(--text); }

/* SCROLL REVEAL */
.reveal { opacity: 0; transform: translateY(20px); transition: opacity .6s ease, transform .6s ease; }
.reveal.revealed { opacity: 1; transform: none; }

/* RESPONSIVE */
@media (max-width: 960px) {
  .nav { padding: 0 20px; }
  .nav-links { display: none; position: fixed; top: 80px; left: 0; right: 0; background: var(--bg-nav); flex-direction: column; padding: 20px; gap: 4px; border-bottom: 1px solid var(--border); backdrop-filter: blur(10px); }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 10px 0; font-size: 15px; border-bottom: 1px solid var(--border); }
  .nav-links li:last-child a { border-bottom: none; }
  .nav-hamburger { display: flex; }
  .nav-cta { display: none; }
  .hero { padding: 36px 20px 48px; }
  .hero-stats { gap: 28px; }
  .section { padding: 48px 20px; }
  .primary-grid, .secondary-grid, .proj-grid { grid-template-columns: 1fr; }
  .cta-inner { flex-direction: column; padding: 36px 20px; }
  .cta-actions { flex-direction: column; width: 100%; }
  .footer-inner { flex-direction: column; text-align: center; }
  .footer { padding: 32px 20px; }
  .footer-links { justify-content: center; }
  .services-strip-inner { padding: 16px 20px; }
  .form-row { grid-template-columns: 1fr; }
}