:root {
  --transparent-yellow: #F5EFC6;
  --sceptre-red: #4D0E12;
  --cerulean-blue: #A5BCD6;
  --potting-soil: #4A2E27;
  --java-brown: #231815;
  --bg-color: #F6F6F6;
  --white: #FFFFFF;
}

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

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg-color);
  color: var(--java-brown);
  min-height: 100vh;
  padding: 30px 20px;
  font-family: "DM Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
}

#mainHeader {
  position: sticky;
  top: 0;
  z-index: 1000;
  width: 100%;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid #e5e5e5;
  border-radius: 12px;
  margin-bottom: 24px;
  transition: box-shadow 0.3s ease;
}

.nav-container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 15px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 25px;
}

.logo-area {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  flex-shrink: 0;
}

.logo-icon {
  width: 45px;
  height: 45px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.logo-icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.logo-text h1 {
  font-size: 16px;
  font-weight: 800;
  color: var(--java-brown);
  line-height: 1.2;
}

.logo-text p {
  font-size: 10px;
  color: #666;
  margin-top: 2px;
}

nav {
  margin-left: auto;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 16px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links li {
  list-style: none;
}

.nav-links a {
  text-decoration: none;
  white-space: nowrap;
  font-size: 13px;
  font-weight: 600;
  color: var(--java-brown);
}

.nav-link {
  position: relative;
  display: inline-block;
  padding: 8px 0;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 2px;
  height: 2px;
  background: var(--java-brown);
  transform: scaleX(0);
  transition: transform 0.25s ease;
}

.nav-link:hover::after,
.nav-link.active::after {
  transform: scaleX(1);
}

.btn-signin,
.btn-login {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 16px;
  border: 1px solid #777;
  border-radius: 30px;
  background: transparent;
  transition: 0.3s ease;
  font-size: 13px;
}

.btn-signin:hover,
.btn-login:hover {
  background: var(--java-brown);
  color: var(--white);
  border-color: var(--java-brown);
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 9px 18px;
  border-radius: 30px;
  background: #080b12;
  border: 1px solid #080b12;
  color: var(--white) !important;
  transition: 0.3s ease;
  font-size: 13px;
}

.btn-primary:hover {
  background: #333;
  transform: translateY(-2px);
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.2rem;
  cursor: pointer;
  color: var(--java-brown);
}

.view {
  display: none;
  opacity: 0;
  transition: opacity 0.25s ease-in-out;
}

.view.active {
  display: block;
  opacity: 1;
}

.card-button {
  width: 100%;
  background-color: var(--transparent-yellow);
  border-radius: 16px;
  padding: 20px 24px;
  display: flex;
  align-items: center;
  gap: 16px;
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.08);
}

.icon-box {
  background-color: rgba(77, 14, 18, 0.1);
  color: var(--sceptre-red);
  font-size: 20px;
  padding: 12px;
  border-radius: 12px;
  flex-shrink: 0;
}

.card-content {
  flex: 1;
}

.card-content h2 {
  font-size: 1.2rem;
  color: var(--sceptre-red);
  margin-bottom: 3px;
}

.card-content p {
  font-size: 0.9rem;
  color: var(--potting-soil);
  opacity: 0.8;
}

.arrow-icon {
  margin-left: auto;
  color: var(--potting-soil);
  flex-shrink: 0;
}

.pill-back-btn {
  background-color: #EEEEEE;
  border: none;
  border-radius: 20px;
  padding: 8px 18px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--java-brown);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 24px;
  transition: background-color 0.2s ease, transform 0.2s ease;
}

.pill-back-btn:hover {
  background-color: #E2E2E2;
  transform: translateX(-2px);
}

.search-container {
  position: relative;
  width: 100%;
  margin-bottom: 20px;
}

.search-icon {
  position: absolute;
  left: 18px;
  top: 50%;
  transform: translateY(-50%);
  color: #888888;
  font-size: 0.95rem;
  pointer-events: none;
}

.search-container input {
  width: 100%;
  padding: 14px 16px 14px 46px;
  border-radius: 12px;
  border: 1px solid #E5E5E5;
  background-color: var(--white);
  font-size: 0.95rem;
  color: var(--java-brown);
  outline: none;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.02);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.search-container input:focus {
  border-color: var(--cerulean-blue);
  box-shadow: 0 0 0 3px rgba(165, 188, 214, 0.2);
}

.search-container input::placeholder {
  color: #A0A0A0;
}

.filter-chips {
  display: flex;
  align-items: center;
  gap: 10px;
  overflow-x: auto;
  padding-bottom: 10px;
  margin-bottom: 24px;
  scrollbar-width: thin;
}

.chip {
  background-color: var(--white);
  border: 1px solid #E5E5E5;
  border-radius: 20px;
  padding: 8px 18px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--java-brown);
  cursor: pointer;
  white-space: nowrap;
  transition: 0.2s ease;
}

.chip:hover {
  border-color: var(--sceptre-red);
  transform: translateY(-1px);
}

.chip.active {
  background-color: var(--sceptre-red);
  color: var(--white);
  border-color: var(--sceptre-red);
}

.resource-grid {
  width: 100%;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
  align-items: stretch;
}

.resource-link {
  display: block;
  width: 100%;
  text-decoration: none;
  color: inherit;
  border: none;
}

.resource-link:focus-visible {
  outline: 3px solid var(--sceptre-red);
  outline-offset: 4px;
  border-radius: 14px;
}

.resource-card {
  width: 100%;
  height: 100%;
  min-height: 150px;
  background-color: var(--white);
  border-radius: 14px;
  padding: 24px 20px;
  text-align: center;
  cursor: pointer;
  border: 1.5px solid transparent;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.03);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 14px;
}

.resource-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
}

.resource-card[data-type="ebooks"],
.resource-card[data-type="simulations"] {
  border-color: var(--cerulean-blue);
  background-color: rgba(165, 188, 214, 0.1);
}

.resource-card[data-type="assessments"],
.resource-card[data-type="notes"] {
  border-color: #A8C3B0;
  background-color: rgba(168, 195, 176, 0.1);
}

.resource-card[data-type="practice"],
.resource-card[data-type="videos"] {
  border-color: var(--transparent-yellow);
  background-color: rgba(245, 239, 198, 0.25);
}

.resource-icon {
  width: 55px;
  height: 55px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  background-color: rgba(35, 24, 21, 0.05);
  font-size: 1.8rem;
  color: var(--java-brown);
  transition: transform 0.2s ease, background-color 0.2s ease;
}

.resource-card:hover .resource-icon {
  transform: scale(1.05);
  background-color: rgba(77, 14, 18, 0.08);
}

.resource-card h3 {
  font-size: 0.95rem;
  color: var(--java-brown);
  font-weight: 600;
  line-height: 1.4;
}

.modal-overlay {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(35, 24, 21, 0.5);
  display: flex;
  justify-content: center;
  align-items: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
  z-index: 2000;
  padding: 20px;
}

.modal-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.modal {
  width: 90%;
  max-width: 480px;
  max-height: 85vh;
  overflow-y: auto;
  background-color: var(--white);
  border-radius: 16px;
  padding: 24px;
  position: relative;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15);
  animation: modalOpen 0.25s ease;
}

@keyframes modalOpen {
  from {
    opacity: 0;
    transform: translateY(10px) scale(0.98);
  }

  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.close-modal {
  position: absolute;
  top: 14px;
  right: 18px;
  background: none;
  border: none;
  font-size: 1.6rem;
  color: var(--potting-soil);
  cursor: pointer;
  line-height: 1;
  transition: color 0.2s ease, transform 0.2s ease;
}

.close-modal:hover {
  color: var(--sceptre-red);
  transform: rotate(90deg);
}

.modal h2 {
  color: var(--sceptre-red);
  font-size: 1.2rem;
  margin-bottom: 12px;
  padding-right: 30px;
}

.modal-body {
  color: var(--java-brown);
  font-size: 0.9rem;
  line-height: 1.5;
}

.modal-body ul {
  margin-top: 8px;
  padding-left: 18px;
}

@media (max-width: 900px) {
  .nav-links {
    gap: 10px;
  }

  .nav-links a {
    font-size: 12px;
  }

  .resource-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 768px) {
  body {
    padding: 15px;
  }

  #mainHeader {
    margin-bottom: 18px;
  }

  .nav-container {
    padding: 12px 15px;
  }

  nav {
    display: none;
  }

  .menu-toggle {
    display: block;
  }

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

  .resource-card {
    min-height: 140px;
  }

  .logo-text h1 {
    font-size: 14px;
  }

  .logo-text p {
    font-size: 9px;
  }
}

@media (max-width: 480px) {
  body {
    padding: 10px;
  }

  .nav-container {
    padding: 10px 12px;
  }

  .logo-icon {
    width: 40px;
    height: 40px;
  }

  .logo-text h1 {
    font-size: 13px;
  }

  .logo-text p {
    font-size: 8px;
  }

  .pill-back-btn {
    margin-bottom: 18px;
  }

  .search-container input {
    font-size: 0.85rem;
    padding: 13px 12px 13px 42px;
  }

  .filter-chips {
    margin-bottom: 18px;
  }

  .resource-card {
    padding: 20px 16px;
  }

  .resource-icon {
    width: 50px;
    height: 50px;
    font-size: 1.6rem;
  }
}