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

body {
  font-family: 'Montserrat', sans-serif;
  background-color: #031a40; /* dark blue */
  color: #f5d67a; /* gold/yellow */
  line-height: 1.6;
  min-height: 100vh;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* Header */
.header {
  background-color: #02214a;
  padding: 1.2rem 0;
  box-shadow: 0 3px 6px rgba(245, 214, 122, 0.4);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.header-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-weight: 700;
  font-size: 1.9rem;
  color: #f5d67a;
  letter-spacing: 0.1em;
  text-shadow: 0 0 8px #f5d67a88;
}

.nav ul {
  list-style: none;
  display: flex;
  gap: 2rem;
}

.nav a {
  color: #f5d67a;
  text-decoration: none;
  font-weight: 600;
  padding: 0.3rem 0;
  border-bottom: 2px solid transparent;
  transition: border-color 0.3s ease;
}

.nav a:hover,
.nav a:focus {
  border-bottom: 2px solid #f5d67a;
}

/* Hero Section */
.hero {
  padding: 7rem 0 5rem;
  text-align: center;
  background: linear-gradient(135deg, #041a40, #022a68);
  box-shadow: inset 0 0 80px #f5d67a88;
  border-radius: 10px;
  margin-bottom: 5rem;
}

.hero-content h2 {
  font-size: 3rem;
  font-weight: 700;
  margin-bottom: 1rem;
  text-shadow: 0 0 12px #f5d67aaa;
}

.hero-content p {
  font-size: 1.3rem;
  margin-bottom: 2rem;
  color: #f5d67aaa;
}

.btn-primary {
  background-color: #f5d67a;
  color: #031a40;
  font-weight: 700;
  padding: 0.8rem 2.5rem;
  border-radius: 50px;
  box-shadow: 0 0 15px #f5d67aaa;
  text-decoration: none;
  transition: background-color 0.3s ease, transform 0.3s ease;
  display: inline-block;
}

.btn-primary:hover,
.btn-primary:focus {
  background-color: #d4b23a;
  transform: scale(1.05);
}

/* Coin Section */
.coin-section {
  background-color: #041a40;
  padding: 3rem 1.5rem;
  border-radius: 10px;
  margin-bottom: 5rem;
  box-shadow: 0 0 40px #f5d67aaa inset;
  text-align: center;
}

.coin-section h3 {
  font-size: 2.25rem;
  margin-bottom: 2rem;
  color: #f5d67a;
  text-shadow: 0 0 15px #f5d67aaa;
}

.coin-info {
  max-width: 600px;
  margin: 0 auto;
  background-color: #022a68;
  border-radius: 10px;
  padding: 2rem;
  box-shadow: 0 0 30px #f5d67a66;
}

.coin-symbol {
  font-size: 2rem;
  font-weight: 700;
  color: #ffdd57;
  margin-bottom: 1rem;
  letter-spacing: 0.2em;
}

.coin-price {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  color: #fff07a;
}

.coin-price span {
  font-weight: 700;
  color: #ffe066;
}

.coin-info p {
  font-size: 1.1rem;
  color: #f5d67aaa;
  line-height: 1.5;
}

/* About Section */
.about-section {
  max-width: 900px;
  margin: 0 auto 5rem auto;
  padding: 2rem 1.5rem;
  text-align: center;
}

.about-section h3 {
  font-size: 2rem;
  margin-bottom: 1.5rem;
  color: #f5d67a;
  text-shadow: 0 0 15px #f5d67aaa;
}

.about-section p {
  font-size: 1.1rem;
  color: #f5d67aaa;
  line-height: 1.6;
}

/* Contact Section */
.contact-section {
  max-width: 700px;
  margin: 0 auto 5rem auto;
  padding: 3rem 1.5rem;
  background-color: #022a68;
  border-radius: 10px;
  box-shadow: 0 0 40px #f5d67a88 inset;
}

.contact-section h3 {
  font-size: 2rem;
  margin-bottom: 2rem;
  color: #f5d67a;
  text-shadow: 0 0 15px #f5d67aaa;
}

form label {
  display: block;
  margin-bottom: 0.5rem;
  color: #f5d67a;
  font-weight: 600;
}

form input,
form textarea {
  width: 100%;
  padding: 0.7rem;
  margin-bottom: 1.5rem;
  border-radius: 5px;
  border: none;
  font-size: 1rem;
}

form input:focus,
form textarea:focus {
  outline: 2px solid #f5d67a;
  background-color: #fef9db;
  color: #031a40;
}

form textarea {
  resize: vertical;
  font-family: inherit;
}

form button {
  background-color: #f5d67a;
  border: none;
  padding: 0.85rem 2.5rem;
  font-weight: 700;
  font-size: 1.1rem;
  border-radius: 50px;
  color: #031a40;
  cursor: pointer;
  box-shadow: 0 0 15px #f5d67aaa;
  transition: background-color 0.3s ease, transform 0.3s ease;
}

form button:hover,
form button:focus {
  background-color: #d4b23a;
  transform: scale(1.05);
}

/* Footer */
.footer {
  background-color: #02214a;
  padding: 1.5rem 0;
  text-align: center;
  color: #f5d67a99;
  font-size: 0.9rem;
  box-shadow: 0 -2px 8px #f5d67a44 inset;
}

/* Responsive */
@media (max-width: 768px) {
  .nav ul {
    gap: 1rem;
  }

  .hero-content h2 {
    font-size: 2rem;
  }

  .coin-info {
    padding: 1.5rem;
  }
}