/* --- 1. Globální proměnné a reset --- */
:root {
  --bg: #f9fafc;
  --card: #ffffff;
  --text: #1a1d26;
  --muted: #6b7280;
  --accent: #0078ff;
  --accent-2: #00c6a7;
  --radius: 14px;
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  --max-width: 1100px;
}

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

/* --- 2. Body a základní layout --- */
body {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-height: 100vh;

  font-family: "Oxanium", sans-serif;
  color: var(--text);
  background: var(--bg);
}

/* --- 3. Header a navigace --- */
header {
  position: relative;
  top: 0;
  z-index: 1000;

  padding: 16px 0;
  background-color: var(--bg-secondary);
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;

  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
  gap: 400px;
}

nav a {
  font-weight: 600;
  text-decoration: none;
  color: var(--muted);

  margin-left: 24px;
  transition: color 0.2s;
}

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

/* Logo */
.logo {
  font-family: 'Oxanium', sans-serif;
  font-weight: 700;

  color: #007BFF;
  text-decoration: none;

  margin-left: 0 !important;
}

/* Menu */
.menu {
  display: flex;
  gap: 24px;
}

.menu-link {
  font-weight: 500;
  text-decoration: none;
  color: var(--text);

  transition: color 0.3s;
}

.menu-link:hover {
  color: #007BFF;
}

/* --- 4. Hero sekce --- */
.hero {
  text-align: center;
  width: 100%;
}

.hero h1 {
  font-weight: 800;
  font-size: 2.8rem;
  color: var(--text);
}

.hero p {
  max-width: 700px;
  margin: 0 auto 15px;
  color: var(--muted);
  margin-top: 10px;
}

.hero-image {
  position: relative;
  width: 100%;
  height: 400px;
  overflow: hidden;
}

.hero-image img {
  position: absolute;
  top: 35%;
  left: 50%;
  transform: translate(-50%, -35%);

  width: 100%;
  height: auto;
  min-height: 100%;
  object-fit: cover;
}

.hero-text {
  text-align: center;
  padding: 145px 20px 130px;
}

/* --- 5. Sekce --- */

/* Buttons */
.btn-primary {
  padding: 12px 28px;
  border: none;
  border-radius: 8px;

  font-weight: 700;
  color: #fff;
  cursor: pointer;

  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);

  transition: transform 0.2s;
}

.btn-primary:hover {
  transform: scale(1.05);
}

/* Obecné sekce */
.section {
  width: 100%;
  max-width: var(--max-width);
  padding: 40px 20px;
}

.section h2 {
  font-size: 2rem;
  text-align: center;
  margin-bottom: 40px;

  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* Services */
.services {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.card {
  position: relative;
  overflow: hidden;
  padding: 30px 24px;
  border-radius: var(--radius);

  text-align: center;
  background: var(--card);
  box-shadow: var(--shadow);

  transition: transform 0.2s, box-shadow 0.2s;
}

#kontakt .card {
  margin-bottom: 40px;
}

.card h3 {
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 16px;
  color: var(--accent);
}

.card p {
  font-size: 0.95rem;
  color: var(--muted);
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

/* Pricing */
.pricing {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px;
  text-align: center;
}

.price-card {
  flex: 1 1 280px;
  padding: 30px;
  border-radius: var(--radius);

  background: var(--card);
  box-shadow: var(--shadow);

  transition: transform 0.2s;
}

.price-card h4 {
  font-size: 1.6rem;
  margin-bottom: 8px;
  color: var(--accent);
}

.price {
  font-size: 1.5rem;
  margin: 10px 0;
}

.price small {
  font-size: 0.9rem;
  color: var(--muted);
}

.price-card:hover {
  transform: scale(1.03);
}

.old-price {
  text-decoration: line-through;
  color: #888;
  margin-right: 10px;
}

.new-price {
  font-weight: 700;
  color: #e63946;
}

.discount-badge {
  display: inline-block;
  background-color: #ffbe0b;
  color: #000;
  font-weight: 600;
  padding: 5px 10px;
  border-radius: 8px;
  margin-top: 5px;
  font-size: 0.9rem;
}

/* FAQ */
.faq-container {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  border-radius: 12px;
  overflow: hidden;
  background: #fff;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
}

.faq-question {
  width: 100%;
  padding: 18px 24px;
  font-size: 1.05rem;
  font-weight: 700;
  text-align: left;
  color: var(--accent);
  background: #fff;
  border: none;
  cursor: pointer;

  transition: background 0.2s;
}

.faq-question:hover {
  background: #e4e9f0;
}

.faq-answer {
  display: none;       /* skryto vždy */
  padding: 16px 24px;
  font-size: 0.95rem;
  color: var(--text);
  background: #fafbfc;
}

.faq-answer.open {
  display: block;      /* zobrazí se okamžitě po kliknutí */
}

/* Articles */
.articles {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
  margin-top: 20px;
}

.article-card {
  display: flex;
  flex-direction: column;
  text-align: center;

  background: var(--card);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);

  transition: transform 0.2s, box-shadow 0.2s;
}

.article-card img {
  width: 100%;
  height: 180px;
  object-fit: cover;
}

.article-card h3 {
  font-size: 1.2rem;
  margin: 16px 12px 8px;
  color: var(--accent);
}

.article-card p {
  font-size: 0.95rem;
  padding: 0 12px 16px;
  color: var(--muted);
}

.article-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

/* Kontakt */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 600px;
  margin: 0 auto;
}

.contact-form label {
  font-weight: 600;
  color: var(--text);
}

.contact-form input,
.contact-form select,
.contact-form textarea {
  width: 100%;
  padding: 12px;
  border-radius: var(--radius);
  border: 1px solid #ccc;
  font-size: 1rem;
  font-family: "Nunito", sans-serif;
  box-sizing: border-box;
}

/* Article preview */
#articlePreview {
  display: none;
  width: 100%;
  margin-top: 30px;
}

#articlePreview .preview-container {
  width: 100%;
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--card);
  box-shadow: var(--shadow);
}

#previewImg {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

#closePreview {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.5);
  color: #fff;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
}

#previewTitle {
  font-size: 1.8rem;
  color: var(--accent);
  margin-bottom: 16px;
  text-align: center;
}

#previewText {
  font-size: 1rem;
  color: var(--text);
  line-height: 1.6;
  white-space: pre-line;
  padding: 0 24px 24px;
  text-align: justify;
}

/* --- 6. Footer --- */
footer {
  width: 100%;
  text-align: center;
  padding: 20px 0;
  font-size: 0.9rem;
  margin-top: auto;

  color: var(--muted);
  background: #fff;
  border-top: 1px solid #eee;
}

footer a {
  color: var(--accent);
  text-decoration: none;
}

/* --- 7. Media queries --- */
@media (max-width: 600px) {
  .hero-image {
    height: 250px;
  }

  .hero-image img {
    top: 50%;
    transform: translate(-50%, -50%);
  }

  .hero-text {
    padding: 10px 20px 40px;
  }

  .hero h1 {
    font-size: 1.5rem;
  }

  .hero p {
    font-size: 0.95rem;
    margin: 10px auto 10px;
  }

  nav {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 12px;
  }

  .logo {
    font-size: 1.4rem;
    margin-bottom: 12px;
    margin-left: 5px;
    text-align: center;
  }

  .menu {
    flex-wrap: wrap;
    justify-content: center;
    gap: 16px;
  }

  nav div {
    gap: 12px;
  }

  nav a {
    font-size: 0.9rem;
    margin-left: 12px;
  }

  .faq-question {
    font-size: 0.95rem;
    padding: 14px 20px;
  }

  .faq-answer {
    font-size: 0.9rem;
    padding: 12px 20px;
  }

  .articles {
    grid-template-columns: 1fr;
  }
}