*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Poppins, sans-serif;
}

html {
  scroll-behavior: smooth;
}

body {
    background: linear-gradient(135deg, #ececec, #cbcbcb);
    color: #fff;
}

/* HEADER */

.header-container {
    display: flex;
    flex-direction: column;
    justify-content: center;
    max-width: 100%;
}

.logo {
    width: 32px;
    height: 32px;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center; 
    padding: 12px 24px;
    background: rgb(245, 245, 245);
}

.navbar ul {
    display: flex;
    list-style: none;
    gap: 24px;
    font-size: 1.2rem;
}

.navbar ul li a {
    color: #5d5d5d;
    text-decoration: none;
    transition: color 0.3s ease;
}

.navbar ul li a:hover {
    color: rgb(161, 8, 8);
}

.hero-banner {
    display: flex;
    flex-direction: column;
    align-items: flex-start; 
    justify-content: center;
    background: rgb(161, 8, 8) url("img/header-img.png") no-repeat right center;
    background-size: contain;
    padding: 150px;
}

.hero-banner h1 {
    font-size: 3rem;
    margin-bottom: 20px;
}

.hero-banner p {
    font-size: 1.5rem;
    margin-bottom: 40px;
}

.btn {
    display: inline-block;
    font-size: 1rem;
    max-width: 200px;
    background-color: #af1f1f;
    color: #fff;
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    text-decoration: none;
    transition: background-color 0.3s ease;
    cursor: pointer;
    box-shadow: #05050564 0px 2px 4px -1px;
}

.btn:hover {
    background-color: #a31d1d;
    box-shadow: #05050584 0px 2px 4px -1px;
}

/* FEATURES */

.features-section{
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2em;
    margin: 0 auto 50px auto;
}

.features-section ul{
    display: flex;
    width: 100%;
}

.features-section li {
    flex: 1;
    list-style: none;
    text-align: center;
    padding: 20px;
}

.features-section h3,
.features-section p,
.features-section i{
    color: #ffffff;
}

.features-section p{
    text-align: justify;
    margin: 15px auto;
    padding: 5px;
}

.features-section i{
    font-size: 2.5rem;
    margin-bottom: 6px;
}

/* Individual card colors */
.feature-card:nth-child(1){ background-color: #540000; }
.feature-card:nth-child(2){ background-color: #760000; }
.feature-card:nth-child(3){ background-color: #8d0101; }
.feature-card:nth-child(4){ background-color: #9c1313; }

/* MAIN */

.main-content{
    max-width: 1200px;
    margin: 0 auto 50px auto;
    padding: 32px;
    background-color: #fff;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

.article-section h2{
    color: #8d0101;
    text-align: center;
    margin: 10px auto;
}

.article-section h3{
    color: #8d0101;
    margin: 10px auto;
}

.article-section p{
    color: #5e5e5e;
    text-align: justify;
    margin: 15px auto;
    padding: 5px;
}

.divider {
  width: 90%; 
  height: 2px; 
  background-color: rgb(161, 8, 8); 
  margin: 40px auto; 
  border-radius: 2px; 
  box-shadow: 0 3px 6px rgba(0,0,0,0.2); 
}

/* SELECT */

.select-wrapper {
    margin: 0 auto 40px auto;
    max-width: 400px;
    display: flex;
    flex-direction: column;
    gap: 15px;
    align-items: center;
    background-color: #540000;
    padding: 25px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.select-info h4,
.select-info p {
    color: #ffffff;
    text-align: center;
    margin: 5px auto;
}

#bloodType {
    padding: 10px;
    border: 1px solid #ccc;
    border-radius: 4px;
    font-size: 1rem;
    width: 50%;
}

/* FAQ */

.faq-section {
  max-width: 800px;
  margin: 60px auto;
  padding: 0 20px;
  color: #333;
}

.faq-item {
  margin-bottom: 35px;
}

.faq-title {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.faq-section h3::after {
  content: "";
  display: block;
  width: 60px;
  height: 4px;
  background-color: rgb(161, 8, 8);
  border-radius: 2px;
  margin-top: 8px;
}

.faq-section p {
  line-height: 1.6;
  font-size: 1rem;
  color: #555;
}

/* FORM */

.faq-title i {
  color: rgb(161, 8, 8);
}

form {
  display: flex;
  flex-direction: column;
  max-width: 400px;
  margin: 20px auto 0 auto;
  color: #333;
}

label {
  font-weight: bold;
  margin-bottom: 5px;
}

input, textarea {
  padding: 10px;
  margin-bottom: 15px;
  border: 1px solid #ccc;
  border-radius: 4px;
  font-size: 1rem;
}

input:focus, textarea:focus {
  border-color: rgb(161, 8, 8);
  outline: none;
}

/* FOOTER */

.footer {
    background-color: #A10808;
    text-align: center;
    padding: 20px 0;
    color: #ffffff;
    font-size: 0.9rem;
}


/* RESPONSIVE */


@media (max-width: 1024px) {

  .hero-banner {
    padding: 80px 40px;
    background-position: center right;
  }

  .features-section ul {
    flex-direction: column;
  }

  .feature-card {
    margin-bottom: 20px;
  }

  .main-content {
    padding: 20px;
  }
}


@media (max-width: 768px) {

  .navbar {
    flex-direction: column;
    gap: 15px;
  }

  .navbar ul {
    flex-direction: column;
    gap: 12px;
    align-items: center;
  }

  .hero-banner {
    padding: 60px 20px;
    background: rgb(161, 8, 8);
  }

  .hero-banner h1 {
    font-size: 2rem;
  }

  .hero-banner p {
    font-size: 1.1rem;
  }

  .btn {
    max-width: 100%;
    text-align: center;
  }

  #bloodType {
    width: 100%;
  }

  form {
    max-width: 100%;
  }

}