/* ********************************* Hero section ********************************* */
.hero-section {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 0 5%;
  background: url('images/home-vector-bg2.jpg') center/cover no-repeat;
  position: relative;
}

.hero-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(11,61,145,0.9) 0%,
    rgba(0,24,61,0.85) 50%,
    rgba(0,0,0,0.6) 100%
  );
  z-index: 1;
}

.hero-text, 
.hero-image {
  position: relative;
  z-index: 2;
  max-width: 600px;
}

.hero-text {
  color: #fff;
  opacity: 0;
  transform: translateX(-50px);
  transition: all 1.5s;
}

.hero-text.reveal {
  opacity: 1;
  transform: translateX(0);
}

.hero-text h1 {
  display: block;
  white-space: nowrap;
  font-size: 3.2rem;
  font-weight: 800;
  margin-bottom: 1.5rem;
  text-shadow: 0 4px 10px rgba(0,0,0,0.3);
  cursor: default;
  animation: floatUpDown 8s ease-in-out infinite;
}

.hero-text h1 span { 
  display: block;   
  font-size: 3rem;     
  color: #ffcc00;
  margin-top: 0.3rem;
}

.hero-text p {
  font-size: 1.15rem;
  line-height: 1.6;
  margin-bottom: 2rem;
  color: #e0ecff;
}

.hero-image img {
  max-width: 95%;
  height: auto;
}

.hero-image {
  opacity: 0;
  transform: translateX(50px);
  transition: all 1.5s;
}

.hero-image.reveal {
  opacity: 1;
  transform: translateX(0);
}

.cta-buttons {
  display: flex;
  gap: 1rem;
}

.cta-buttons a {
  padding: 0.7rem 1.5rem;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.9rem;
  text-decoration: none;
  transition: all 0.3s ease;
}

.primary-hero-btn {
  background-color: #ffcc00;
  color: #0b3d91;
  box-shadow: 0 4px 10px rgba(0,0,0,0.2);
}

.primary-hero-btn:hover {
  background-color: #ffdb4d;
  transform: scale(1.05);
}

.secondary-hero-btn {
  border: 2px solid #fff;
  color: #fff;
}

.secondary-hero-btn:hover {
  background: rgba(255, 255, 255, 0.1);
  transform: scale(1.05);
}

@keyframes floatUpDown {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-20px);
  }
}

/***************************************** Feature section ******************************************/
.key-features-section {
  padding: 7rem 10% 10rem;
  padding-bottom: 10rem;
  background-color: #f7f9fc;
  text-align: center;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.key-features-container{
  max-width: 1000px;
}

.feature-badge {
  display: inline-block;
  font-size: 1.2rem;
  padding: 0.4rem 0.8rem;
  background-color: #e0ecff;
  color: #0b3d91;
  border-radius: 20px;
  font-weight: 500;
  width: 100%;
}

.feature-heading {
  font-size: 2.2rem;
  color: #0b3d91;
  font-weight: 700;
  margin-bottom: 1rem;
}

.feature-subtitle {
  font-size: 1rem;
  color: #555;
  max-width: 700px;
  margin: 0 auto 4rem;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr); /* แสดง 3 การ์ดต่อแถวเท่านั้น */
  gap: 2rem;
}

.feature-card {
  background-color: #fff;
  border: 1px solid #e2e8f0;
  border-radius: 15px;
  padding: 2rem 1.5rem;
  box-shadow: 0 4px 16px rgba(0,0,0,0.04);
  transition: all 0.3s ease;
  opacity: 0;
  transform: translateY(40px);
}

.feature-card.visible {
  opacity: 1;
  transform: translateY(0);
}

.feature-card:hover {
  box-shadow: 0 6px 24px rgba(0,0,0,0.06);
  transform: translateY(-5px);
}

.feature-icon {
  background-color: #e0ecff;
  color: #0b3d91;
  width: 50px;
  height: 50px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem;
}

.feature-icon svg {
  width: 26px;
  height: 26px;
}

.feature-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: #0b3d91;
  margin-bottom: 0.5rem;
}

.feature-card p {
  font-size: 0.95rem;
  color: #333;
  line-height: 1.5;
}

/* animation */
.key-features-section .feature-badge,
.key-features-section .feature-heading,
.key-features-section .feature-subtitle {
  opacity: 0;
  transform: translateY(25px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.key-features-section.visible .feature-badge {
  opacity: 1;
  transform: translateY(0);
  transition-delay: 0.1s;
}

.key-features-section.visible .feature-heading {
  opacity: 1;
  transform: translateY(0);
  transition-delay: 0.25s;
}

.key-features-section.visible .feature-subtitle {
  opacity: 1;
  transform: translateY(0);
  transition-delay: 0.4s;
}

/********************************* Latest note section **********************************/
.latest-notes-section {
  position: relative;
  background: linear-gradient(to bottom, #f0f7ff, #e1efff);
  padding: 7rem 10%;
  overflow: hidden;
}

.latest-notes-section::before,
.latest-notes-section::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.265);
  z-index: 0;
}

.latest-notes-section::before {
  top: -85px;
  right: -100px;
  width: 300px;
  height: 300px;
}

.latest-notes-section::after {
  bottom: -80px;
  left: -80px;
  width: 250px;
  height: 250px;
}

.latest-notes-container {
  max-width: 1000px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.section-heading {
  font-size: 2.2rem;
  color: #0b3d91;
  text-align: center;
  margin-bottom: 0.8rem;
}

.section-subtitle {
  font-size: 1rem;
  text-align: center;
  color: #444;
  margin-bottom: 3rem;
  max-width: 700px;
  justify-self: center;
}

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
  gap: 20px;
}

.card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  background: #fff;
  border: 1px solid #e5e7eb;
  border-radius: 14px;
  padding: 20px;
  box-shadow: 0 4px 10px rgba(0,0,0,0.08);
  transition: transform 0.25s ease, box-shadow 0.25s ease, opacity 0.6s ease;
  will-change: transform, box-shadow, opacity;
  opacity: 0;
  transform: translateY(25px);
}

.card.visible {
  opacity: 1;
  transform: translateY(0);
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: 0 10px 24px rgba(0,0,0,0.18);
}

.card header {
  display: flex;
  justify-content: space-between;
  gap: 10px;
}

.title-wrap {
  flex: 1;
  min-width: 0;
  margin-right: 8px;
}

.title {
  display: -webkit-box; 
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical; 
  overflow: hidden;
}

.title a {
  text-decoration: none;
  color: #0b3d91; 
  font-size: 16px;
  font-weight: 700;
}

.title a:hover {
  text-decoration: underline;
}

/* favorite button */
.fav-btn {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  border: 1px solid #e5e7eb;
  background: #fff;
  cursor: pointer;
  color: #9ca3af;
  transition: all 0.2s ease;
}

.fav-btn:hover { 
  background: #fef3c7;
  border-color: #fbbf24;
  color: #d97706;
}

.meta {
  display: flex;
  gap: 8px;
  color: #6b7280;
  font-size: 13px;
  margin-top: 5px;
}

.meta span {
  max-width: 200px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* description */
.desc {
  color: #555; 
  font-size: 14px; 
  line-height: 1.45; 
  margin-top: 6px;
  display: -webkit-box;
  -webkit-box-orient: vertical; 
  overflow: hidden; 
  text-overflow: ellipsis;
}

/* ถ้าชื่อการ์ด 2 บรรทัด */
.desc.clamp-4 {
  -webkit-line-clamp: 4;
  line-clamp: 4;
}

/* ถ้าชื่อการ์ด 1 บรรทัด */
.desc.clamp-5 {
  -webkit-line-clamp: 5;
  line-clamp: 5;
}

/* tags */
.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-left: -3px;
}

.foot {
  margin-top: auto;
}

.badge {
  padding: 5px 10px;
  border-radius: 50px;
  background: #eef6ff;
  border: 1px solid #c7daf9;
  font-size: 12px;
  color: #0b3d91;
  text-decoration: none;
  cursor: default;
  transition: all 0.2s ease;
}

.badge:hover {
  background: #dce7f9;
}

/* see all button */
.see-all {
  display: flex;
  justify-content: center;
  margin-top: 3rem;
}

.see-all-btn {
  padding: 10px 24px;
  background: #0b3d91;
  border: none;
  border-radius: 50px;
  color: #fff;
  font-size: 15px;
  font-weight: bold;
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  gap: 8px;
}

.see-all-btn:hover {
  background: #093372;
  transform: translateY(-2px);
}

/* animations */
.latest-notes-section .section-badge,
.latest-notes-section .section-heading,
.latest-notes-section .section-subtitle,
.latest-notes-section .see-all-btn {
  opacity: 0;
  transform: translateY(25px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.latest-notes-section.visible .section-badge {
  opacity: 1;
  transform: translateY(0);
  transition-delay: 0.1s;   
}

.latest-notes-section.visible .section-heading {
  opacity: 1;
  transform: translateY(0);
  transition-delay: 0.25s;  
}

.latest-notes-section.visible .section-subtitle {
  opacity: 1;
  transform: translateY(0);
  transition-delay: 0.4s;  
}

.latest-notes-section.visible .see-all-btn {
  opacity: 1;
  transform: translateY(0);
  transition-delay: 0.55s;  
}

/********************************* Top Contributors section **********************************/
.top-contributors-section {
  background-color: #f7f9fc;
  padding: 8rem 10%;
  position: relative;
  overflow: hidden;
}

.top-contributors-container {
  max-width: 1100px;
  margin: 0 auto;
  text-align: center;
  margin-bottom: 3rem;
}

.contributors-title {
  font-size: 2.2rem;
  color: #0b3d91;
  margin-bottom: 1rem;
}

.contributors-subtext {
  font-size: 1rem;
  color: #444;
  margin-bottom: 3rem;
  max-width: 700px;
  justify-self: center;
}

/* Title + Subtext animation (default hidden) */
.contributors-title,
.contributors-subtext {
  opacity: 0;
  transform: translateY(25px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.top-contributors-section.visible .contributors-title {
  opacity: 1;
  transform: translateY(0);
  transition-delay: 0.1s;
}

.top-contributors-section.visible .contributors-subtext {
  opacity: 1;
  transform: translateY(0);
  transition-delay: 0.25s;
}

/* Contributors grid */
.contributors-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2.5rem;
  justify-items: stretch;
}

/* Contributor card animation */
.contributor-card {
  background-color: #fff;
  border-radius: 15px;
  padding: 2.2rem 1.8rem;
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.06);
  transition: all 0.3s ease;
  text-align: center;
  min-height: 340px;
  opacity: 0;
  transform: translateY(40px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
}

.contributor-card.visible {
  opacity: 1;
  transform: translateY(0);
}

.contributor-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

.medal {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.avatar {
  width: 84px;
  height: 84px;
  border-radius: 50%;
  object-fit: cover;
  margin-bottom: 1rem;
  border: 3px solid #0b3d91;
}

.name {
  font-size: 1.2rem;
  font-weight: 600;
  color: #0b3d91;
  margin-bottom: 0.4rem;
}

.uploads {
  font-size: 0.95rem;
  color: #666;
  margin-bottom: 1.2rem;
}

.view-profile-btn {
  padding: 0.6rem 1rem;
  background: #0b3d91;
  color: #fff;
  border-radius: 50px;
  text-decoration: none;
  transition: all 0.3s ease;
  font-size: 0.9rem;
}

.view-profile-btn:hover {
  background: #093372;
}

/***************************************** Quickstart Section ******************************************/
.quickstart-pro {
  background: linear-gradient(to bottom, #f2f8ff, #e1efff);
  padding: 5rem 10%;
}

.quickstart-container {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4rem;
  max-width: 1400px;
  margin: 0 auto;
}

.quickstart-content {
  flex: 1 1 510px;
}

.quickstart-image {
  flex: 1 1 400px;
  opacity: 0;
  transform: translateX(50px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.quickstart-pro.visible .quickstart-image {
  opacity: 1;
  transform: translateX(0);
  transition-delay: 0.35s;
}

.quickstart-image img {
  max-width: 90%;
  height: auto;
}

.quickstart-title {
  font-size: 2.3rem;
  color: #0b3d91;
  margin-bottom: 1rem;
  opacity: 0;
  transform: scale(0.95);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.quickstart-pro.visible .quickstart-title {
  opacity: 1;
  transform: scale(1);
  transition-delay: 0.1s;
}

.quickstart-subtitle {
  font-size: 1.05rem;
  color: #444;
  margin-bottom: 2.5rem;
  opacity: 0;
  transform: translateX(-30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.quickstart-pro.visible .quickstart-subtitle {
  opacity: 1;
  transform: translateX(0);
  transition-delay: 0.3s;
}

.quickstart-step {
  display: flex;
  align-items: flex-start;
  gap: 1.5rem;
  margin-bottom: 2.2rem;
  opacity: 0;
  transform: translateY(40px);
  transition: all 0.6s ease;
}

.quickstart-step.visible {
  opacity: 1;
  transform: translateY(0);
}

.icon-circle {
  min-width: 48px;
  height: 48px;
  background-color: #0b3d91;
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.icon-circle svg {
  width: 24px;
  height: 24px;
}

.step-text h3 {
  font-size: 1.2rem;
  color: #0b3d91;
  margin: 0 0 0.3rem;
}

.step-text p {
  font-size: 0.98rem;
  color: #444;
  line-height: 1.6;
}

/***************************************** FAQ Section ******************************************/
.faq-section {
  background: #f6f9ff;
  padding: 6rem 10%;
}

.faq-container {
  max-width: 1000px;
  margin: 0 auto;
}

.faq-heading {
  font-size: 2.2rem;
  font-weight: 600;
  color: #0b3d91;
  text-align: center;
  margin-bottom: 2.5rem;
  opacity: 0;
  transform: translateY(25px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.faq-section.visible .faq-heading {
  opacity: 1;
  transform: translateY(0);
  transition-delay: 0.15s;
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 1.3rem;
}

.faq-item {
  background: white;
  border-radius: 12px;
  box-shadow: 0 6px 18px rgba(0,0,0,0.04);
  overflow: hidden;
  transition: all 0.3s ease;
}

.faq-question {
  background: none;
  border: none;
  width: 100%;
  padding: 1.2rem 1.5rem;
  font-size: 1.05rem;
  font-weight: 600;
  color: #0b3d91;
  text-align: left;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
}

.faq-icon {
  width: 20px;
  height: 20px;
  stroke: #0b3d91;
  transition: all 0.6s ease;
}

.faq-item.open .faq-icon {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  background: #f0f5ff;
  padding: 0 1.5rem;
  transition: all 0.4s ease;
}

.faq-item.open .faq-answer {
  max-height: 500px;
  padding: 1rem 1.5rem;
}

.faq-answer p {
  font-size: 0.95rem;
  color: #333;
  line-height: 1.7;
  margin: 0.2rem 0;
}

.faq-answer .th {
  color: #555;
  font-size: 0.9rem;
}

.faq-item {
  opacity: 0;
  transform: translateY(40px);
  transition: all 0.6s ease;
}

.faq-item.visible {
  opacity: 1;
  transform: translateY(0);
}

/***************************************** Testimonial Section ******************************************/
.testimonial-section {
  background: #eef6ff;
  background: linear-gradient(to bottom, #f2f8ff, #e1efff);
  padding: 7rem 10% 12rem;
}

.testimonial-container {
  max-width: 1000px;
  margin: 0 auto;
  text-align: center;
}

.testimonial-title {
  font-size: 2.2rem;
  color: #0b3d91;
  margin-bottom: 1rem;
  font-weight: 600;
}

.testimonial-subtext {
  font-size: 1rem;
  color: #444;
  max-width: 800px;
  margin: 0 auto 3rem;
}

.testimonial-title,
.testimonial-subtext {
  opacity: 0;
  transform: translateY(25px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.testimonial-section.visible .testimonial-title {
  opacity: 1;
  transform: translateY(0);
  transition-delay: 0.15s;
}

.testimonial-section.visible .testimonial-subtext {
  opacity: 1;
  transform: translateY(0);
  transition-delay: 0.3s;
}

.testimonial-grid {
  display: grid;
  gap: 2rem;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
}

.testimonial-card {
  background: white;
  border-radius: 16px;
  padding: 2rem;
  box-shadow: 0 6px 20px rgba(0,0,0,0.05);
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
  align-items: center;
  opacity: 0;
  transform: translateY(50px);
  transition: all 0.6s ease;
}

.testimonial-card.visible {
  opacity: 1;
  transform: translateY(0);
}

.testimonial-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 8px 28px rgba(0,0,0,0.1);
}

.avatar {
  width: 84px;
  height: 84px;
  border-radius: 50%;
  object-fit: cover;
  margin-bottom: 1.2rem;
}

.quote {
  font-style: italic;
  color: #333;
  margin-bottom: 1.5rem;
}

.name {
  font-size: 1rem;
  font-weight: 600;
  color: #0b3d91;
}

/***************************************** About Section ******************************************/
.about-dme-section {
  display: flex;
  align-items: center;
  justify-content: center;
  background: #f6f9ff;
  padding: 10rem 10% 12rem;
}

.about-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 4rem;
  max-width: 1200px;
}

.about-text {
  flex: 1 1 500px;
  opacity: 0;
  transform: translateY(40px);
  transition: all 0.8s ease;
}

.about-text.visible {
  opacity: 1;
  transform: translateY(0);
}

.about-text h2 {
  font-size: 2.2rem;
  color: #0b3d91;
  margin-bottom: 1rem;
}

.about-text p {
  font-size: 1.1rem;
  line-height: 1.8;
  color: #333;
  margin-bottom: 2rem;
}

.read-more-btn {
  padding: 12px 28px;
  background: #0b3d91;
  color: #fff;
  border-radius: 50px;
  text-decoration: none;
  font-weight: bold;
  transition: all 0.3s ease;
  margin-left: -0.5rem;
}

.read-more-btn:hover {
  background: #093372;
}

.about-image {
  flex: 1 1 400px;
  opacity: 0;
  transform: translateY(40px);
  transition: all 0.8s ease;
}

.about-image.visible {
  opacity: 1;
  transform: translateY(0);
}

.about-image img {
  max-width: 100%;
}

/***************************************** CTA Section ******************************************/
.cta-bottom-section {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 10rem 10% 10rem;
  background: linear-gradient(135deg, #dbeafe 0%, #bfdbfe 100%);
  position: relative;
  overflow: hidden;
}

.cta-bottom-container{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  max-width: 1200px;
}

.cta-bottom-section::before, 
.cta-bottom-section::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  z-index: 0;
}
.cta-bottom-section::before {
  width: 300px; height: 300px;
  top: -100px; left: -100px;
}
.cta-bottom-section::after {
  width: 300px; height: 300px;
  bottom: -100px; right: -100px;
}

.cta-content {
  flex: 1 1 500px;
  max-width: 500px;
  z-index: 1;
  opacity: 0;
  transform: translateY(40px);
  transition: all 0.8s ease;
}

.cta-content.visible {
  opacity: 1;
  transform: translateY(0);
}

.cta-content h1 {
  font-size: 2.8rem;
  font-weight: 700;
  color: #0b3d91;
  margin-bottom: 1rem;
}

.cta-content p {
  font-size: 1.15rem;
  line-height: 1.6;
  color: #333;
  margin-bottom: 2rem;
}

.cta-btn {
  display: inline-block;
  padding: 0.9rem 1.5rem;
  background: #0b3d91;
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  border-radius: 50px;
  text-decoration: none;
  box-shadow: 0 4px 12px rgba(13, 110, 253, 0.3);
  transition: all 0.3s ease;
}

.cta-btn:hover {
  background: #093372;
  box-shadow: 0 6px 16px rgba(13, 110, 253, 0.4);
  transform: translateY(-3px);
}

.cta-btn2 {
  display: inline-block;
  padding: 0.9rem 1.5rem;
  background-color: rgba(255, 255, 255, 0.699);
  color: #0d6efd;
  font-size: 0.9rem;
  font-weight: 600;
  border: 2px solid #0d6efd;
  border-radius: 50px;
  text-decoration: none;
  transition: all 0.3s ease;
}

.cta-btn2:hover {
  background-color: #e0edff;
  color: #0d6efd;
  border-color: #0d6efd;
  box-shadow: 0 4px 12px rgba(13, 110, 253, 0.15);
  transform: translateY(-2px);
}

.cta-image {
  flex: 1 1 400px;
  z-index: 1;
  opacity: 0;
  transform: translateY(40px);
  transition: all 0.8s ease;
}

.cta-image.visible {
  opacity: 1;
  transform: translateY(0);
}

.cta-image img {
  max-width: 600px;
  width: 100%;
  height: auto;
}