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

:root {
  --bg: #0a0a0a;
  --bg-2: #0f0f0f;
  --bg-card: #141414;
  --border: rgba(255,255,255,0.07);
  --text: #f0f0f0;
  --text-muted: rgba(240,240,240,0.4);
  --accent: #e8302a;
  --accent-dim: rgba(232,48,42,0.1);
  --font: 'Inter', sans-serif;
  --radius: 10px;
  --radius-lg: 16px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

html { scroll-behavior: smooth; font-size: 16px; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-weight: 400;
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { display: block; max-width: 100%; }

/* ---- CONTAINER ---- */
.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 40px;
}

/* ---- BUTTONS ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 100px;
  font-family: var(--font);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover { background: #d42820; transform: translateY(-1px); }

.btn-ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-ghost:hover { border-color: rgba(255,255,255,0.2); background: rgba(255,255,255,0.05); }

.btn-large { padding: 16px 36px; font-size: 1rem; }

/* ---- NAV ---- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px 40px;
  transition: background var(--transition), backdrop-filter var(--transition);
}

.nav.scrolled {
  background: rgba(10,10,10,0.88);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 14px 40px;
}

.nav-logo {
  position: absolute;
  left: 40px;
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.nav-links {
  display: flex;
  align-items: center;
  background: rgba(255,255,255,0.05);
  border: 1px solid var(--border);
  border-radius: 100px;
  padding: 6px 8px;
  gap: 2px;
}

.nav-links a {
  font-size: 0.82rem;
  color: var(--text-muted);
  padding: 7px 16px;
  border-radius: 100px;
  transition: var(--transition);
}
.nav-links a:hover { color: var(--text); background: rgba(255,255,255,0.06); }

.nav-cta {
  background: var(--accent) !important;
  color: #fff !important;
  font-weight: 500;
}
.nav-cta:hover { background: #d42820 !important; }

.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
  position: absolute;
  right: 24px;
}
.nav-hamburger span {
  display: block;
  width: 24px;
  height: 1.5px;
  background: var(--text);
  transition: var(--transition);
}

/* ---- HERO ---- */
.hero-canvas {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  pointer-events: none;
  z-index: 0;
}

.hero {
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 120px 40px 80px;
  position: relative;
  overflow: hidden;
  z-index: 1;
}

.hero-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  margin-bottom: 20px;
  opacity: 0;
  animation: fadeUp 0.7s 0.1s ease forwards;
}

.hero-heading {
  font-size: clamp(3.2rem, 9vw, 7.5rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 0.95;
  margin-bottom: 24px;
  opacity: 0;
  animation: fadeUp 0.7s 0.2s ease forwards;
}

.hero-heading .dot { color: var(--accent); }

.hero-sub {
  font-size: clamp(0.95rem, 1.8vw, 1.1rem);
  color: var(--text-muted);
  max-width: 480px;
  line-height: 1.7;
  margin: 0 auto 44px;
  opacity: 0;
  animation: fadeUp 0.7s 0.35s ease forwards;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
  opacity: 0;
  animation: fadeUp 0.7s 0.45s ease forwards;
}

.hero-scroll-hint {
  position: absolute;
  bottom: 36px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  opacity: 0;
  animation: fadeIn 1s 1.2s ease forwards;
}

.hero-scroll-hint span {
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.scroll-line {
  width: 1px;
  height: 40px;
  background: var(--border);
  position: relative;
  overflow: hidden;
}
.scroll-line::after {
  content: '';
  position: absolute;
  top: -100%; left: 0;
  width: 100%; height: 100%;
  background: var(--accent);
  animation: lineDown 2s 1.5s ease-in-out infinite;
}

/* ---- SECTIONS ---- */
.section { padding: 100px 0; }
.section-dark { background: var(--bg-2); }

.section-tag {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 10px;
}

.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 48px;
}

/* ---- SERVICES ---- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.service-card {
  background: var(--bg-card);
  padding: 44px 36px;
  position: relative;
  transition: background var(--transition);
}
.service-card:hover { background: #181818; }

.service-num {
  font-size: clamp(5rem, 10vw, 8rem);
  font-weight: 800;
  letter-spacing: -0.05em;
  line-height: 1;
  color: var(--accent);
  margin-bottom: 16px;
  display: block;
  opacity: 0.9;
}

.service-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin-bottom: 10px;
}

.service-card p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 20px;
}

.service-tools {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}
.service-tools li {
  font-size: 0.72rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 100px;
  background: var(--accent-dim);
  color: var(--accent);
  letter-spacing: 0.03em;
}

/* ---- PROJECTS ---- */
.projects-tabs {
  display: flex;
  gap: 6px;
  margin-bottom: 36px;
  flex-wrap: wrap;
}

.tab-btn {
  padding: 8px 20px;
  border-radius: 100px;
  font-family: var(--font);
  font-size: 0.82rem;
  font-weight: 500;
  cursor: pointer;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-muted);
  transition: var(--transition);
}
.tab-btn:hover { color: var(--text); border-color: rgba(255,255,255,0.18); }
.tab-btn.active { background: var(--accent); color: #fff; border-color: var(--accent); }

.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.project-card {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform var(--transition), border-color var(--transition);
  cursor: pointer;
  position: relative;
}
.project-card:hover { transform: translateY(-4px); border-color: rgba(255,255,255,0.14); }
.project-card:hover .project-img::after { opacity: 1; }
.project-card.hidden { display: none; }

.project-img {
  aspect-ratio: 4/3;
  position: relative;
  overflow: hidden;
  display: block;
}

/* Project placeholder — jednotné pozadí */
.project-img--tlf,
.project-img--occamy,
.project-img--cermitech,
.project-img--wantex,
.project-img--fireflow,
.project-img--akademie,
.project-img--hana,
.project-img--delphino,
.project-img--marek,
.project-img--neohrozene,
.project-img--znacky,
.project-img--prehrada { background: linear-gradient(135deg, #111318 0%, #1c1f26 100%); }

/* Big letter overlay */
.project-img::before {
  content: attr(data-letter);
  position: absolute;
  bottom: -10px; right: 8px;
  font-size: 11rem;
  font-weight: 800;
  letter-spacing: -0.06em;
  line-height: 1;
  color: var(--accent);
  opacity: 0.18;
  pointer-events: none;
  user-select: none;
  z-index: 1;
}

.project-img::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.75) 0%, rgba(0,0,0,0.1) 55%, transparent 100%);
  z-index: 2;
  transition: opacity var(--transition);
}

.project-info {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  padding: 18px 20px 20px;
  z-index: 3;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 12px;
}

.project-tag {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 3px;
  display: block;
}

.project-info h3 {
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: #fff;
}

.project-info p {
  font-size: 0.78rem;
  color: rgba(255,255,255,0.55);
  text-align: right;
  line-height: 1.4;
  max-width: 180px;
}

/* ---- ABOUT ---- */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 80px;
  align-items: center;
}

.about-text .section-tag { margin-bottom: 10px; }
.about-text .section-title { margin-bottom: 24px; }

.about-text p {
  font-size: 0.92rem;
  color: var(--text-muted);
  line-height: 1.85;
  margin-bottom: 16px;
  max-width: 520px;
}
.about-text p em { color: var(--text); font-style: normal; font-weight: 500; }

.tools-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 28px;
}
.tools-row span {
  font-size: 0.78rem;
  font-weight: 500;
  padding: 6px 14px;
  border-radius: 100px;
  border: 1px solid var(--border);
  color: var(--text-muted);
}

.about-visual {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.about-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 22px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.about-card:first-child { grid-column: 1 / -1; }
.about-card--accent { border-color: rgba(232,48,42,0.3); background: var(--accent-dim); }

.about-stat {
  font-size: 2.6rem;
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1;
}
.about-card--accent .about-stat { color: var(--accent); }

.about-stat-label {
  font-size: 0.78rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* ---- CONTACT ---- */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 80px;
  align-items: start;
}

.contact-left .section-tag { margin-bottom: 10px; }

.contact-heading {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
  margin-bottom: 14px;
}

.contact-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 36px;
  line-height: 1.7;
}

.contact-info { display: flex; flex-direction: column; }

.contact-detail {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
  transition: color var(--transition);
  font-size: 0.88rem;
}
.contact-detail:first-child { border-top: 1px solid var(--border); }
.contact-detail:hover { color: var(--accent); }

.contact-detail-label {
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-muted);
}

/* ---- FORM ---- */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.form-group label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.form-group input,
.form-group textarea {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 13px 15px;
  font-family: var(--font);
  font-size: 0.88rem;
  color: var(--text);
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
  resize: vertical;
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: rgba(240,240,240,0.18); }
.form-group input:focus,
.form-group textarea:focus {
  border-color: rgba(232,48,42,0.45);
  box-shadow: 0 0 0 3px rgba(232,48,42,0.08);
}

.form-submit { align-self: flex-start; margin-top: 4px; }

.form-success {
  display: none;
  font-size: 0.85rem;
  color: #4caf50;
  font-weight: 500;
}
.form-success.visible { display: block; }

/* ---- FOOTER ---- */
.footer {
  padding: 24px 0;
  border-top: 1px solid var(--border);
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* ---- MODAL ---- */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(0,0,0,0.75);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 24px 16px;
  overflow-y: auto;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}
.modal-overlay.open {
  opacity: 1;
  pointer-events: all;
}

.modal {
  background: #111315;
  border: 1px solid var(--border);
  border-radius: 20px;
  width: 100%;
  max-width: 860px;
  padding: 36px;
  position: relative;
  transform: translateY(20px);
  transition: transform 0.35s cubic-bezier(0.4,0,0.2,1);
  margin: auto;
}
.modal-overlay.open .modal { transform: translateY(0); }

.modal-close {
  position: absolute;
  top: 20px; right: 20px;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border);
  border-radius: 50%;
  width: 40px; height: 40px;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  color: var(--text-muted);
  transition: var(--transition);
}
.modal-close:hover { background: rgba(255,255,255,0.1); color: var(--text); }

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 24px;
  margin-bottom: 32px;
  padding-right: 48px;
}

.modal-tag {
  display: inline-block;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 6px;
}

.modal-title {
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 8px;
}

.modal-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.65;
  max-width: 480px;
}

.modal-link {
  flex-shrink: 0;
  font-size: 0.85rem;
  padding: 11px 20px;
}
.modal-link.hidden { display: none; }

.modal-gallery {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px;
}

.modal-gallery-item {
  border-radius: 10px;
  overflow: hidden;
  cursor: zoom-in;
  aspect-ratio: 16/10;
  background: #1a1c20;
  position: relative;
  transition: transform var(--transition);
}
.modal-gallery-item:first-child:nth-last-child(1) {
  grid-column: 1 / -1;
}
.modal-gallery-item:hover { transform: scale(1.01); }

.modal-gallery-item img {
  width: 100%; height: 100%;
  object-fit: cover;
  display: block;
}

.modal-no-images {
  grid-column: 1 / -1;
  text-align: center;
  padding: 48px 24px;
  color: var(--text-muted);
  font-size: 0.85rem;
  border: 1px dashed var(--border);
  border-radius: 10px;
}
.modal-no-images code {
  display: block;
  margin-top: 8px;
  font-size: 0.78rem;
  color: var(--accent);
  opacity: 0.7;
}

/* ---- LIGHTBOX ---- */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 300;
  background: rgba(0,0,0,0.95);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}
.lightbox.open { opacity: 1; pointer-events: all; }

.lightbox-img {
  max-width: 90vw;
  max-height: 88vh;
  object-fit: contain;
  border-radius: 8px;
  user-select: none;
  transition: opacity 0.2s ease;
}
.lightbox-img.switching { opacity: 0; }

.lightbox-close {
  position: fixed;
  top: 20px; right: 20px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 50%;
  width: 44px; height: 44px;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  color: var(--text);
  transition: var(--transition);
}
.lightbox-close:hover { background: rgba(255,255,255,0.15); }

.lightbox-nav {
  position: fixed;
  top: 50%; transform: translateY(-50%);
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: 50%;
  width: 48px; height: 48px;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  color: var(--text);
  transition: var(--transition);
}
.lightbox-nav:hover { background: rgba(255,255,255,0.12); }
.lightbox-prev { left: 20px; }
.lightbox-next { right: 20px; }
.lightbox-nav:disabled { opacity: 0.2; cursor: default; }

.lightbox-counter {
  position: fixed;
  bottom: 24px; left: 50%; transform: translateX(-50%);
  font-size: 0.78rem;
  color: rgba(255,255,255,0.4);
  letter-spacing: 0.08em;
}

/* ---- REVEAL ---- */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ---- KEYFRAMES ---- */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}
@keyframes lineDown {
  0%   { top: -100%; }
  50%  { top: 100%; }
  100% { top: 100%; }
}

/* ---- RESPONSIVE ---- */
@media (max-width: 960px) {
  .container { padding: 0 24px; }
  .nav { padding: 16px 24px; }
  .nav.scrolled { padding: 12px 24px; }
  .nav-logo { left: 24px; }
  .nav-links { display: none; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    inset: 0;
    background: var(--bg);
    justify-content: center;
    align-items: center;
    gap: 28px;
    z-index: 99;
    border-radius: 0;
    border: none;
    background: var(--bg);
  }
  .nav-links.open a { font-size: 1.3rem; color: var(--text); padding: 0; }
  .nav-hamburger { display: flex; z-index: 101; }

  .hero { padding: 100px 24px 60px; }
  .services-grid { grid-template-columns: 1fr; }
  .projects-grid { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; }
  .about-visual { grid-template-columns: repeat(3, 1fr); }
  .about-card:first-child { grid-column: auto; }
  .contact-grid { grid-template-columns: 1fr; gap: 48px; }
  .form-row { grid-template-columns: 1fr; }
}

@media (max-width: 600px) {
  .section { padding: 64px 0; }
  .about-visual { grid-template-columns: 1fr 1fr; }
  .footer-inner { flex-direction: column; gap: 6px; text-align: center; }
}