/* =====================
   GLOBAL RESET
===================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: "Segoe UI", Tahoma, sans-serif;
  background: #081725; /* dark blue */
  color: #f5f1e6; /* cream */
  line-height: 1.7;
  padding-top: 80px; /* match navbar height */


}

/* =====================
   NAVBAR
===================== */
.navbar {
  position: fixed;         /* fixes navbar at top */
  top: 0;                  /* top edge */
  left: 0;
  width: 100%;             /* full width */
  z-index: 9999;           /* above all other content */
  background: rgba(11, 28, 45, 0.95);  /* dark blue with transparency */
  backdrop-filter: blur(10px);         /* glassy effect */
  padding: 18px 60px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 2px solid #ff6f3c;    /* subtle orange border */
  box-shadow: 0 5px 20px rgba(0,0,0,0.5); /* optional depth */
  transition: all 0.3s ease;
}

/* Optional: shrink padding when scrolling */
.navbar.shrink {
  padding: 10px 60px;
}

.logo {
  font-size: 22px;
  font-weight: 600;
  letter-spacing: 0.5px;
  color: #ff8c32; /* orange accent */
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 36px;
}

.nav-links a {
  text-decoration: none;
  color: #f5f1e6;
  font-size: 15px;
  position: relative;
  padding-bottom: 6px;
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  height: 2px;
  width: 0%;
  background: #ff8c32;
  transition: width 0.35s ease;
}

.nav-links a:hover::after {
  width: 100%;
}

.menu-toggle {
  display: none;
  font-size: 26px;
  color: #f5f1e6;
  cursor: pointer;
}

/* =====================
   HERO SPLIT
===================== */
.hero-split {
  min-height: 100vh;
  padding: 80px 70px;
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 60px;
  align-items: center;
  background: #0a1b2b;
}

.hero-info h1 {
  font-size: 46px;
  font-weight: 700;
  color: #ff6f3c; /* orange */
  margin-bottom: 15px;
}

.subtitle {
  font-size: 18px;
  color: #dcdcdc;
  margin-bottom: 25px;
}

.hero-text {
  font-size: 16.5px;
  color: #e0e0e0;
  line-height: 1.8;
  margin-bottom: 18px;
}

.hero-btn {
  margin-top: 25px;
  padding: 12px 30px;
  border-radius: 30px;
  border: none;
  background: #ff6f3c;
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
}

.hero-btn:hover {
  background: #ff8659;
  transform: translateY(-2px);
}

.hero-tags {
  margin-top: 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hero-tags span {
  padding: 6px 16px;
  border-radius: 20px;
  background: #ff6f3c;
  color: #fff;
  font-size: 13px;
}

.hero-image img {
  width: 100%;
  max-height: 650px;
  object-fit: cover;
  border-radius: 20px;
  box-shadow: 0 35px 80px rgba(0, 0, 0, 0.7);
}

/* =====================
   SECTIONS
===================== */

.section {
  margin: 60px auto;
  padding: 40px 20px;
  max-width: 1100px;
  color: #f5f1e6;
  font-family: "Segoe UI", Tahoma, sans-serif;
  line-height: 1.8;
  background: #0a1b2b;
  border-radius: 15px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.7);
}

h2 {
  font-size: 38px;
  text-align: center;
  color: #ff8c32;
  margin-bottom: 40px;
}

h3 {
  font-size: 28px;
  color: #ff6f3c;
  margin-top: 30px;
  margin-bottom: 20px;
}

.centered-image {
  text-align: center;
  margin: 25px 0;
}

.centered-image img {
  max-width: 70%;
  border-radius: 15px;
  box-shadow: 0 25px 60px rgba(0,0,0,0.7);
}

p {
  font-size: 16px;
  margin-bottom: 20px;
  color: #dcdcdc;
}

ul {
  margin: 20px 0 30px 20px;
  padding: 0;
  list-style-type: disc;
}

ul li {
  margin-bottom: 15px;
  font-size: 16px;
}

@media (max-width: 768px) {
  h2 { font-size: 28px; }
  h3 { font-size: 22px; }
  p, ul li { font-size: 15px; }
  .centered-image img { max-width: 90%; }
}
.section {
  max-width: 1100px;
  margin: 60px auto;
  padding: 40px 25px;
  background: #0a1b2b;
  color: #f5f1e6;
  border-radius: 15px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.7);
}

h2 {
  text-align: center;
  font-size: 36px;
  color: #ff8c32;
  margin-bottom: 25px;
}

p.intro, .diagram-description {
  font-size: 16px;
  color: #dcdcdc;
  text-align: center;
  margin-bottom: 40px;
  line-height: 1.7;
}

/* Protocol Cards */
.protocol-cards {
  display: flex;
  gap: 30px;
  justify-content: center;
  flex-wrap: wrap;
}

.card {
  background: #081725;
  border-radius: 15px;
  overflow: hidden;
  width: 480px;
  box-shadow: 0 15px 40px rgba(0,0,0,0.5);
  transition: transform 0.3s, box-shadow 0.3s;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 25px 60px rgba(0,0,0,0.7);
}

.card-image img {
  width: 100%;
  height: auto;
  display: block;
}

.card-content {
  padding: 20px 25px;
}

.card-content h3 {
  color: #ff6f3c;
  margin-bottom: 15px;
  font-size: 24px;
}

.card-content p {
  font-size: 15px;
  margin-bottom: 15px;
  color: #e0e0e0;
}

.card-content ul {
  list-style-type: disc;
  padding-left: 20px;
}

.card-content ul li {
  margin-bottom: 8px;
}

/* Diagram Section */
.centered-image {
  text-align: center;
  margin: 35px 0;
}

.centered-image img {
  max-width: 90%;
  border-radius: 15px;
  box-shadow: 0 25px 60px rgba(0,0,0,0.6);
}

/* Responsive */
@media (max-width: 1000px) {
  .protocol-cards {
    flex-direction: column;
    align-items: center;
  }

  .card {
    width: 90%;
  }
}

/* =====================
   RESPONSIVE
===================== */
@media(max-width:1000px){
  .hero-split { grid-template-columns: 1fr; padding: 60px 40px; }
  .hero-info h1 { font-size: 38px; }
  .hero-image img { max-height: 400px; margin-top: 30px; }
  .nav-links { flex-direction: column; gap: 24px; display: none; }
  .nav-links.show { display: flex; }
  .menu-toggle { display: block; }
}
/* Feature Cards Container */
.feature-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
  margin-top: 30px;
}

/* Individual Card */
.feature-card {
  background-color: #0a1b2b; /* dark blue */
  border-radius: 20px;
  padding: 20px;
  text-align: center;
  box-shadow: 0 12px 40px rgba(255,111,60,0.2);
  transition: transform 0.4s ease, box-shadow 0.4s ease;
}

.feature-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 25px 50px rgba(255,111,60,0.5);
}

.feature-card img {
  width: 100%;
  height: 160px;
  object-fit: cover;
  border-radius: 15px;
  margin-bottom: 15px;
}

.feature-card h3 {
  font-size: 20px;
  color: #ff6f3c;
  margin-bottom: 10px;
}

.feature-card p {
  font-size: 14px;
  color: #f5f1e6;
  margin-bottom: 10px;
}

/* Advanced Button */
.more-btn {
  background: linear-gradient(135deg, #ff6f3c, #ff9f3c);
  border: none;
  color: #fff;
  font-weight: 600;
  padding: 10px 25px;
  border-radius: 25px;
  font-size: 14px;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: all 0.3s ease;
}

.more-btn::after {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: rgba(255,255,255,0.2);
  transform: skewX(-20deg);
  transition: all 0.5s ease;
}

.more-btn:hover::after {
  left: 100%;
}

.more-btn:hover {
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 8px 20px rgba(255,111,60,0.4);
}

/* Hidden Info */
.more-info {
  display: none;
  margin-top: 10px;
  font-size: 13px;
  color: #dcdcdc;
  line-height: 1.5;
}

.more-info.show {
  display: block;
}

/* === RESPONSIVE === */
@media (max-width: 992px) {
  .feature-card img {
    height: 150px;
  }
}

@media (max-width: 768px) {
  .feature-cards {
    grid-template-columns: 1fr;
  }
  .feature-card img {
    height: 180px;
  }
}
.accordion-btn {
  width: 100%;
  text-align: left;
  background: #081725;
  color: #ff6f3c;
  font-size: 18px;
  padding: 18px;
  border: none;
  border-bottom: 1px solid #ff8c32;
  cursor: pointer;
  transition: background 0.3s;
}

.accordion-btn:hover {
  background: #0a1e32;
}

.accordion-content {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
  background: #0a1b2b;
  padding: 0 18px;
  color: #dcdcdc;
}

.accordion-content p {
  margin: 15px 0;
}
.video-container {
  position: relative;
  width: 100%;
  max-width: 900px;
  margin: 25px auto;
  overflow: hidden;
  border-radius: 15px;
  box-shadow: 0 25px 60px rgba(0,0,0,0.6);
}

.video-container iframe {
  width: 100%;
  height: 500px;
  border: none;
}

.video-description {
  text-align: center;
  font-size: 16px;
  color: #dcdcdc;
  margin-bottom: 20px;
  line-height: 1.7;
}

.video-link {
  text-align: center;
  margin-top: 15px;
}

.video-link a {
  color: #ff8c32;
  text-decoration: none;
  font-weight: 600;
  transition: color 0.3s;
}

.video-link a:hover {
  color: #ff4e0d;
}

@media (max-width: 768px) {
  .video-container iframe {
    height: 300px;
  }
  .video-description {
    font-size: 15px;
  }
}
.site-footer {
  background: #081725;
  color: #f5f1e6;
  padding: 50px 30px 20px 30px;
  font-family: "Segoe UI", Tahoma, sans-serif;
  
  /* Full-width top and bottom borders */
  border-top: 4px solid #ff6f3c;    /* top border in orange */
  border-bottom: 4px solid #ff6f3c; /* bottom border in orange */
  
  box-shadow: 0 -5px 20px rgba(0,0,0,0.4); /* subtle shadow for depth */
}

.footer-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
  max-width: 1200px;
  margin: 0 auto;
}

.footer-about h3,
.footer-contact h3,
.footer-links h3 {
  color: #ff6f3c;
  margin-bottom: 15px;
  font-size: 20px;
}

.footer-about p,
.footer-contact p,
.footer-links ul li {
  font-size: 15px;
  line-height: 1.7;
  color: #dcdcdc;
}

.footer-links ul {
  list-style: none;
  padding: 0;
}

.footer-links ul li {
  margin-bottom: 10px;
}

.footer-links ul li a {
  text-decoration: none;
  color: #ff8c32;
  transition: color 0.3s;
}

.footer-links ul li a:hover {
  color: #ff6f3c;
}

.footer-social {
  margin-top: 15px;
  display: flex;
  gap: 15px;
}

.footer-social a {
  color: #fff;
  text-decoration: none;
  background: #ff6f3c;
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 14px;
  transition: all 0.3s ease;
}

.footer-social a:hover {
  background: #ff8c32;
  transform: scale(1.1);
}

.footer-bottom {
  text-align: center;
  margin-top: 30px;
  font-size: 14px;
  color: #dcdcdc;
  border-top: 1px solid rgba(255,140,50,0.5); /* subtle separator above copyright */
  padding-top: 15px;
}

/* Responsive */
@media (max-width: 768px) {
  .footer-container {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .footer-social {
    justify-content: center;
  }
}
.site-footer {
  background: #06141f; /* darker than main background */
  color: #f5f1e6;
  padding: 50px 30px 20px 30px;
  font-family: "Segoe UI", Tahoma, sans-serif;
  border-top: 4px solid #ff6f3c;
  border-bottom: 4px solid #ff6f3c;
}

.footer-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
  max-width: 1200px;
  margin: 0 auto;
  border-left: none;
  border-right: none;
  padding: 20px;
}
/* Contact links style */
.footer-contact a {
  color: #ff8c32;      /* orange accent color */
  text-decoration: none; /* remove underline */
  font-weight: 500;     /* optional: make it slightly bold */
  transition: color 0.3s ease;
}

.footer-contact a:hover {
  color: #ff6f3c; /* hover effect: brighter orange */
}

/* Borders between divs */
.footer-container > div:not(:last-child) {
  border-right: 2px solid rgba(255, 140, 50, 0.3); /* subtle orange line */
  padding-right: 20px;
}

/* Headings */
.footer-about h3,
.footer-contact h3,
.footer-links h3 {
  color: #ff6f3c;
  margin-bottom: 15px;
  font-size: 20px;
}

/* Text */
.footer-about p,
.footer-contact p,
.footer-links ul li {
  font-size: 15px;
  line-height: 1.7;
  color: #dcdcdc;
}

/* Links */
.footer-links ul {
  list-style: none;
  padding: 0;
}

.footer-links ul li {
  margin-bottom: 10px;
}

.footer-links ul li a {
  text-decoration: none;
  color: #ff8c32;
  transition: color 0.3s;
}

.footer-links ul li a:hover {
  color: #ff6f3c;
}

/* Social buttons */
.footer-social {
  margin-top: 15px;
  display: flex;
  gap: 15px;
}

.footer-social a {
  color: #fff;
  text-decoration: none;
  background: #ff6f3c;
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 14px;
  transition: all 0.3s ease;
}

.footer-social a:hover {
  background: #ff8c32;
  transform: scale(1.1);
}

/* Footer bottom */
.footer-bottom {
  text-align: center;
  margin-top: 30px;
  font-size: 14px;
  color: #dcdcdc;
  border-top: 1px solid rgba(255,140,50,0.5);
  padding-top: 15px;
}

/* Responsive */
@media (max-width: 768px) {
  .footer-container {
    grid-template-columns: 1fr;
    text-align: center;
  }

  /* Remove borders for stacked layout */
  .footer-container > div:not(:last-child) {
    border-right: none;
    padding-right: 0;
    border-bottom: 2px solid rgba(255,140,50,0.3);
    padding-bottom: 20px;
  }

  .footer-social {
    justify-content: center;
  }
}
#backToTop {
  position: fixed;
  bottom: 40px;          /* distance from bottom */
  right: 30px;           /* distance from right */
  background-color: #ff6f3c; /* orange accent */
  color: #fff;
  font-size: 26px;
  padding: 15px 18px;
  border-radius: 12px;   /* slightly rounded corners */
  text-align: center;
  text-decoration: none;
  box-shadow: 0 10px 25px rgba(0,0,0,0.5);
  transition: all 0.3s ease;
  opacity: 0;
  visibility: hidden;
  z-index: 9999;
}

#backToTop:hover {
  background-color: #ff8c32;
  transform: scale(1.2);
  box-shadow: 0 15px 30px rgba(0,0,0,0.6);
}