:root {
  --dark-bg: #F7DBC5;
  --light-bg: #F8F6E9;
  --text-color: #37474F;
  --primary-color: #795548;
  --accent-color: #4DD0E1;
  --footer-color: #90A4AE;
  --card-bg: #FFFFFF;
  --card-selected-bg: linear-gradient(135deg, #F0FDFF 0%, #E8FAF8 100%);
  --card-glow: rgba(77, 208, 225, 0.3);
  --card-shadow: 0 10px 20px rgba(0, 0, 0, 0.15);
  --card-radius: 20px;
  --font-heading: 'Fredoka', sans-serif;
  --font-body: 'Fredoka', sans-serif;
}

html {
  scroll-behavior: smooth;
}

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

body {
  font-family: var(--font-body);
  background-color: var(--dark-bg);
  /* background-image: url('assets/background.png'); */
  color: var(--text-color);
  line-height: 1.6;
}

main {
  margin: 0 auto;
  padding: 0;
}

main>section {
  padding: 0 20px;
}

/* Waves */
.waves {
  position: absolute;
  left: 0;
  right: 0;
  width: 100%;
  height: 32px;
  overflow: hidden;
  padding: 0;
  margin: 0;
}

.waves>svg {
  width: 4000px;
}

.wave {
  fill: var(--dark-bg);
  stroke: var(--dark-bg);
  stroke-opacity: 0.5;
  stroke-width: 2px;
  animation: slide 15s linear infinite;
  animation-delay: 0s;
}

@keyframes slide {
  from {
    transform: translateX(0);
  }

  to {
    transform: translateX(-2000px);
  }
}

/* Header */
header {
  position: relative;
  background-color: var(--light-bg);
  padding: 40px 0;
  text-align: center;
  margin-bottom: 16px;
  /*
  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
  */
}

header h1 {
  font-size: 5rem;
  font-weight: 700;
  letter-spacing: 1px;
  filter: drop-shadow(0px 4px 4px rgba(0, 0, 0, 0.25));
  text-transform: uppercase;
  color: #4DB6C4;
  text-shadow: 2px 2px 0px #206d78, -1px -1px 0 #fff;
}

.subtitle {
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--primary-color);
}

header div.waves {
  bottom: 0;
}

/* Hero */
#hero {
  text-align: center;
  margin-bottom: 50px;
}

#hero h2 {
  font-size: 2rem;
  color: var(--primary-color);
  margin-bottom: 10px;
}

/* Cards */
.cards {
  display: flex;
  flex-direction: column;
  gap: 30px;
  margin-bottom: 60px;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.card {
  background: var(--card-bg);
  border-radius: var(--card-radius);
  padding: 30px;
  text-align: left;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  border: 3px solid transparent;
  display: flex;
  align-items: center;
  gap: 30px;
  cursor: pointer;
  scroll-margin-top: 100px;
}

.card:hover {
  /* TODO: decide */
  box-shadow: 0 8px 25px var(--card-glow), var(--card-shadow);
  box-shadow: var(--card-shadow);
  border-color: var(--accent-color);
}

.card:target {
  border-color: var(--accent-color);
  box-shadow: 0 0 15px var(--card-glow);
  background: var(--card-selected-bg);
  animation: pulse-glow 2s ease-in-out infinite;
}

.card img {
  width: 150px;
  height: 150px;
  border-radius: 10px;
  object-fit: contain;
  flex-shrink: 0;
}

.card-content {
  flex-grow: 1;
}

.card h3 {
  color: var(--primary-color);
  margin-bottom: 10px;
  font-size: 1.5rem;
}

.card .desc {
  margin-bottom: 10px;
  font-weight: 400;
}

.card .meaning {
  font-weight: 600;
  color: var(--accent-color);
  text-transform: uppercase;
  font-size: 0.9rem;
  letter-spacing: 1px;
}

/* Resources */
#resources {
  position: relative;
  background-color: var(--light-bg);
  text-align: center;
  padding: 50px;
  margin: 0;
}

#resources h2 {
  color: var(--primary-color);
  margin-bottom: 20px;
}


/* FAQ Section */
.faq-container {
  max-width: 800px;
  margin: 0 auto;
  text-align: left;
}

.faq-item {
  background: var(--card-bg);
  border-radius: var(--card-radius);
  margin-bottom: 20px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
  transition: box-shadow 0.2s ease;
  overflow: hidden;
}

.faq-item:last-child {
  margin-bottom: 0;
}

.faq-item:hover {
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.1);
}

.faq-item summary {
  padding: 25px 30px;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 15px;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: '';
  width: 12px;
  height: 12px;
  border-right: 3px solid var(--accent-color);
  border-bottom: 3px solid var(--accent-color);
  transform: rotate(-45deg);
  transition: transform 0.3s ease;
  flex-shrink: 0;
}

.faq-item[open] summary::after {
  transform: rotate(45deg);
}

.faq-item summary:hover {
  background: rgba(77, 208, 225, 0.05);
}

.faq-item summary:focus {
  outline: none;
}

.faq-item summary:focus-visible {
  outline: 2px solid var(--accent-color);
  outline-offset: -2px;
}

.faq-item h3 {
  color: var(--primary-color);
  font-size: 1.2rem;
  margin: 0;
  line-height: 1.4;
}

.faq-item[open] {
  border: 2px solid var(--accent-color);
}

.faq-answer {
  color: var(--text-color);
  padding: 0 30px 25px;
}

.faq-answer p {
  margin-bottom: 12px;
  line-height: 1.7;
}

.faq-answer p:last-of-type {
  margin-bottom: 15px;
}

.faq-answer ul {
  margin: 12px 0 15px 20px;
  list-style: disc;
}

.faq-answer li {
  margin-bottom: 8px;
  line-height: 1.6;
}

.faq-answer li:last-child {
  margin-bottom: 0;
}

.faq-answer strong {
  color: var(--primary-color);
}

.faq-source {
  display: block;
  font-style: normal;
  font-size: 0.85rem;
  color: var(--footer-color);
  padding-top: 12px;
  border-top: 1px solid var(--dark-bg);
  margin-top: 5px;
}

.faq-source a {
  color: var(--accent-color);
  text-decoration: none;
  font-weight: 600;
}

.faq-source a:hover {
  text-decoration: underline;
}

#resources .waves {
  top: 0;
  transform: scaleY(-1);
}

/* Footer */
footer {
  background-color: var(--light-bg);
  text-align: center;
  font-size: 0.9rem;
  color: var(--foooter-color);
  padding: 50px 20px;
}

/* Screen reader only - visible to assistive tech and crawlers */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}