/* Reset a základ */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  background-color: #1e1e1e;
  color: #ddd;
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* Header a navigace */
header {
  background-color: #121212;
  padding: 0.75rem 1.5rem;
  box-shadow: 0 2px 6px rgba(0,0,0,0.7);
  position: sticky;
  top: 0;
  z-index: 1000;
}

nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
}

.logo-text-wrapper a img {
  height: 48px;
  width: 48px;
  object-fit: cover;
  border-radius: 50%;
  box-shadow: 0 0 6px rgba(0,0,0,0.6);
  display: block;
}

.logo-text-wrapper span {
  color: #fff;
  font-weight: 700;
  font-size: 1.2rem;
  user-select: none;
}

/* Menu */
.menu {
  list-style: none;
  display: flex;
  gap: 24px;
}

.menu li a {
  color: #ddd;
  text-decoration: none;
  font-weight: 600;
  padding: 8px 12px;
  border-radius: 4px;
  transition: background-color 0.3s ease, color 0.3s ease;
}

.menu li a:hover,
.menu li a:focus {
  background-color: #ffcc00;
  color: #1e1e1e;
  outline: none;
}

/* Hamburger menu pro mobil */
.menu-toggle {
  display: none;
  font-size: 2rem;
  color: #ffcc00;
  cursor: pointer;
}

/* Kontejner sekcí */
.container {
  max-width: 900px;
  padding: 2rem 1rem;
  margin: 1.5rem auto;
}

/* Nadpisy */
h1, h2 {
  color: #ffcc00;
  margin-bottom: 0.8rem;
}

h1 {
  font-size: 2.4rem;
  font-weight: 700;
}

h2 {
  font-size: 1.8rem;
  font-weight: 700;
}

/* Odkazy */
a {
  color: #ffcc00;
  text-decoration: underline;
  font-weight: 700;
  cursor: pointer;
}

a:hover,
a:focus {
  color: #ffd633;
  outline: none;
}

/* Text odstavce */
p {
  margin-bottom: 1rem;
  font-size: 1.05rem;
}

/* Seznam s ikonami (checklist) */
.centered-checklist {
  list-style: none;
  padding-left: 0;
  margin-top: 1rem;
}

.centered-checklist li {
  position: relative;
  padding-left: 24px;
  margin-bottom: 0.7rem;
  font-weight: 600;
}

.centered-checklist li::before {
  content: "✔";
  position: absolute;
  left: 0;
  color: #ffcc00;
  font-weight: bold;
}

/* Formulář */
form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  max-width: 450px;
  margin: 0 auto;
}

label {
  font-weight: 600;
  font-size: 1rem;
  color: #ddd;
}

input[type="text"],
input[type="email"],
input[type="tel"] {
  padding: 10px 12px;
  border: none;
  border-radius: 6px;
  font-size: 1rem;
  background-color: #2a2a2a;
  color: #eee;
  transition: background-color 0.3s ease, box-shadow 0.3s ease;
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="tel"]:focus {
  outline: none;
  background-color: #3b3b3b;
  box-shadow: 0 0 6px 2px #ffcc00;
}

/* Tlačítko */
.buy-btn {
  background-color: #ffcc00;
  color: #1e1e1e;
  font-weight: 700;
  padding: 14px 0;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  font-size: 1.1rem;
  transition: background-color 0.3s ease;
}

.buy-btn:hover,
.buy-btn:focus {
  background-color: #e6b800;
  outline: none;
}

/* Tooltip */
.tooltip-btn {
  position: relative;
  background-color: #ffcc00;
  color: #1e1e1e;
  border: none;
  border-radius: 50%;
  width: 24px;
  height: 24px;
  font-weight: bold;
  font-size: 14px;
  cursor: help;
  display: flex;
  align-items: center;
  justify-content: center;
}

.tooltip-text {
  visibility: hidden;
  opacity: 0;
  width: 250px;
  background-color: #333;
  color: #fff;
  text-align: center;
  border-radius: 6px;
  padding: 8px;
  position: absolute;
  z-index: 10;
  bottom: 125%;
  left: 50%;
  transform: translateX(-50%);
  font-size: 13px;
  line-height: 1.3;
  transition: opacity 0.3s ease;
  pointer-events: none;
}

.crypto-cta {
  display: flex;
  justify-content: center;
  margin: 40px 0;
}

.crypto-box {
  background: #1e1e1e;
  border: 3px solid #ffcc00;
  border-radius: 16px;
  padding: 30px 40px;
  text-align: center;
  max-width: 600px;
  box-shadow: 0 8px 20px rgba(0,0,0,0.5);
}

.crypto-box h2 {
  color: #ffcc00;
  font-size: 2rem;
  margin-bottom: 15px;
}

.crypto-box p {
  color: #fff;
  font-size: 1.2rem;
  margin-bottom: 20px;
}

.crypto-btn {
  display: inline-block;
  background: #ffcc00;
  color: #1e1e1e;
  font-size: 1.4rem;
  font-weight: bold;
  padding: 14px 28px;
  border-radius: 12px;
  text-decoration: none;
  transition: 0.3s ease;
}

.crypto-btn:hover {
  background: #e6b800;
  transform: scale(1.05);
}

.copyable {
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.copyable:hover {
  transform: translateY(-2px);
  box-shadow: 0 2px 6px rgba(255, 204, 0, 0.5);
}

/* YouTube subscribe box */
.youtube-subscribe {
  margin: 2rem auto 4rem;
  max-width: 320px;
  text-align: center;
}

/* Responsivita */
@media (max-width: 768px) {
  nav {
    flex-wrap: wrap;
  }

  .menu {
    flex-direction: column;
    width: 100%;
    display: none;
    background-color: #121212;
    padding: 0.5rem 0;
  }

  .menu.active {
    display: flex;
  }

  .menu li {
    padding: 10px 1.5rem;
  }

  .menu-toggle {
    display: block;
  }
}