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

html {
  overflow-x: hidden;
}

body {
  font-family: "Arial", sans-serif;
  background: #0f111a;
  color: #fff;
  overflow-x: hidden;
  width: 100%;
  max-width: 100vw;
}

/* Header */
header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 60px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 1.5rem;
  background: rgba(0, 0, 0, 0.85);
  z-index: 100;
}

header .logo {
  font-size: 1.5rem;
  font-weight: bold;
}

/* Desktop nav */
nav ul {
  list-style: none;
  display: flex;
  gap: 2rem;
}

nav ul li a {
  text-decoration: none;
  color: #fff;
  font-weight: 500;
}

nav ul li a:hover {
  color: #64ffda;
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  z-index: 101;
}

.hamburger span {
  width: 25px;
  height: 3px;
  background: #fff;
  border-radius: 2px;
}

/* Overlay */
.overlay {
  display: none;
}

/* Hero */
.hero {
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  text-align: center;
  position: relative;
  background: url("assets/img/jj-ying-8bghKxNU1j0-unsplash.jpg") no-repeat
    center center/cover;
  animation: zoomBackground 20s infinite alternate ease-in-out;
}

.hero-content h1 {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.hero-content p {
  font-size: 1.2rem;
  margin-bottom: 2rem;
  color: #ccc;
}

/* Scroll chevron */
.scroll-down {
  display: inline-block;
  cursor: pointer;
  animation: bounce-fade 3s infinite;
}

.scroll-down svg {
  width: 3rem;
  height: 3rem;
  stroke: #fff;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

@keyframes bounce-fade {
  0%,
  20%,
  50%,
  80%,
  100% {
    transform: translateY(0);
    opacity: 1;
  }
  40% {
    transform: translateY(12px);
    opacity: 0.6;
  }
  60% {
    transform: translateY(6px);
    opacity: 0.8;
  }
}

@keyframes zoomBackground {
  0% {
    transform: scale(1);
  }
  100% {
    transform: scale(1.05);
  }
}

/* Responsive */
@media (max-width: 768px) {
  .hamburger {
    display: flex;
  }

  nav {
    position: fixed;
    top: 60px;
    right: -250px;
    width: 250px;
    height: calc(100% - 60px);
    background: rgba(0, 0, 0, 0.95);
    display: flex;
    flex-direction: column;
    padding: 2rem 1rem;
    transition: right 0.3s ease;
    z-index: 101;
  }

  nav.active {
    right: 0;
  }

  nav ul {
    flex-direction: column;
    gap: 1.5rem;
  }

  nav ul li a {
    font-size: 1.2rem;
    color: #fff;
  }

  .overlay {
    position: fixed;
    top: 60px;
    left: 0;
    width: 100%;
    height: calc(100% - 60px);
    background: rgba(0, 0, 0, 0.5);
    display: none;
    z-index: 100;
  }

  .overlay.active {
    display: block;
  }
}

/* Timeline Section */
.timeline-section {
  position: relative;
  background: linear-gradient(180deg, #0f111a 0%, #1a1f2e 100%);
  overflow-x: hidden;
  width: 100%;
  /* Provide better sticky context */
  min-height: 100vh;
  padding-bottom: 200px; /* Ensure enough space for sticky to work */
}

.timeline-fade-top {
  position: fixed;
  top: 60px;
  left: 0;
  right: 0;
  height: 120px;
  background: linear-gradient(
    180deg,
    rgba(15, 17, 26, 0.9) 0%,
    rgba(15, 17, 26, 0.4) 50%,
    transparent 100%
  );
  z-index: 10;
  pointer-events: none;
}

.timeline-container {
  width: 100%;
  max-width: 900px;
  margin: 0 auto;
  padding: 100px 2rem 100px;
  position: static; /* Changed from relative to allow proper sticky behavior */
  overflow-x: hidden;
  /* Ensure sufficient height for sticky positioning */
  min-height: 100vh;
}

.timeline-title {
  text-align: center;
  font-size: 2.2rem;
  margin-bottom: 4rem;
  color: #64ffda;
  text-shadow: 0 0 20px rgba(100, 255, 218, 0.3);
  line-height: 1.2;
}

/* Era Indicators */
.era-indicators {
  display: flex !important;
  visibility: visible !important;
  opacity: 1 !important;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 3rem;
  position: sticky;
  top: 100px;
  z-index: 1000;
  background: rgba(15, 17, 26, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 1rem 2rem;
  border-radius: 25px;
  border: 1px solid rgba(100, 255, 218, 0.3);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  width: fit-content;
  max-width: calc(100vw - 4rem);
  margin: 0 auto 3rem auto;
  /* Force hardware acceleration for better performance */
  will-change: transform;
  transform: translateZ(0);
}

.era-indicator {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  padding: 0.8rem 1rem;
  border-radius: 15px;
  transition: all 0.3s ease;
  cursor: pointer;
  opacity: 0.6;
}

.era-indicator.active {
  opacity: 1;
  background: rgba(100, 255, 218, 0.1);
}

.era-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  transition: all 0.3s ease;
}

.era-label {
  font-size: 0.8rem;
  color: #fff;
  font-weight: 500;
  transition: all 0.3s ease;
}

/* Era Colors */
.era-indicator[data-era="1"] .era-dot {
  background: #ff6b6b;
}
.era-indicator[data-era="2"] .era-dot {
  background: #4ecdc4;
}
.era-indicator[data-era="3"] .era-dot {
  background: #45b7d1;
}
.era-indicator[data-era="4"] .era-dot {
  background: #96ceb4;
}
.era-indicator[data-era="5"] .era-dot {
  background: #feca57;
}
.era-indicator[data-era="6"] .era-dot {
  background: #ff9ff3;
}

/* Mobile Vertical Navigation - Hidden by default, only show on mobile */
.mobile-vertical-nav {
  display: none;
}

/* Ensure mobile navigation never shows on desktop */
@media (min-width: 641px) {
  .mobile-vertical-nav {
    display: none !important;
  }
}

.era-indicator.active[data-era="1"] {
  border: 1px solid #ff6b6b;
  box-shadow: 0 0 20px rgba(255, 107, 107, 0.3);
}
.era-indicator.active[data-era="2"] {
  border: 1px solid #4ecdc4;
  box-shadow: 0 0 20px rgba(78, 205, 196, 0.3);
}
.era-indicator.active[data-era="3"] {
  border: 1px solid #45b7d1;
  box-shadow: 0 0 20px rgba(69, 183, 209, 0.3);
}
.era-indicator.active[data-era="4"] {
  border: 1px solid #96ceb4;
  box-shadow: 0 0 20px rgba(150, 206, 180, 0.3);
}
.era-indicator.active[data-era="5"] {
  border: 1px solid #feca57;
  box-shadow: 0 0 20px rgba(254, 202, 87, 0.3);
}
.era-indicator.active[data-era="6"] {
  border: 1px solid #ff9ff3;
  box-shadow: 0 0 20px rgba(255, 159, 243, 0.3);
}

/* Vertical Timeline Track */
.timeline-track {
  position: relative;
  max-width: 700px;
  margin: 0 auto;
  padding-right: 0.3rem;
}

.timeline-track::before {
  content: "";
  position: absolute;
  left: 30px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(
    180deg,
    #ff6b6b 0%,
    #ff6b6b 16.66%,
    #4ecdc4 16.66%,
    #4ecdc4 33.32%,
    #45b7d1 33.32%,
    #45b7d1 49.98%,
    #96ceb4 49.98%,
    #96ceb4 66.64%,
    #feca57 66.64%,
    #feca57 83.3%,
    #ff9ff3 83.3%,
    #ff9ff3 100%
  );
  border-radius: 1px;
  opacity: 0.6;
}

/* Timeline Items */
.timeline-item {
  position: relative;
  margin-bottom: 4rem;
  opacity: 0;
  transform: translateY(50px);
  transition: all 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.timeline-item:first-child {
  margin-top: 2rem;
}

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

.timeline-item.active {
  transform: scale(1.02);
}

.timeline-marker {
  position: absolute;
  left: 20px;
  top: 20px;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 3px solid rgba(15, 17, 26, 1);
  z-index: 2;
  transition: all 0.3s ease;
}

/* Era-specific marker colors */
.timeline-item.era-1 .timeline-marker {
  background: #ff6b6b;
  box-shadow: 0 0 20px rgba(255, 107, 107, 0.5);
}
.timeline-item.era-2 .timeline-marker {
  background: #4ecdc4;
  box-shadow: 0 0 20px rgba(78, 205, 196, 0.5);
}
.timeline-item.era-3 .timeline-marker {
  background: #45b7d1;
  box-shadow: 0 0 20px rgba(69, 183, 209, 0.5);
}
.timeline-item.era-4 .timeline-marker {
  background: #96ceb4;
  box-shadow: 0 0 20px rgba(150, 206, 180, 0.5);
}
.timeline-item.era-5 .timeline-marker {
  background: #feca57;
  box-shadow: 0 0 20px rgba(254, 202, 87, 0.5);
}
.timeline-item.era-6 .timeline-marker {
  background: #ff9ff3;
  box-shadow: 0 0 20px rgba(255, 159, 243, 0.5);
}

.timeline-item.active .timeline-marker {
  transform: scale(1.3);
  box-shadow: 0 0 30px rgba(255, 255, 255, 0.3);
}

.timeline-content {
  margin-left: 70px;
  background: rgba(255, 255, 255, 0.03);
  border-radius: 20px;
  padding: 2rem;
  backdrop-filter: blur(15px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: all 0.4s ease;
  position: relative;
  overflow: hidden;
  max-width: calc(100vw - 120px);
  box-sizing: border-box;
}

.timeline-content::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  border-radius: 20px;
  padding: 1px;
  background: linear-gradient(
    135deg,
    transparent,
    rgba(255, 255, 255, 0.1),
    transparent
  );
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask-composite: exclude;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.timeline-item:hover .timeline-content::before,
.timeline-item.active .timeline-content::before {
  opacity: 1;
}

.timeline-item:hover .timeline-content,
.timeline-item.active .timeline-content {
  transform: translateX(10px);
  background: rgba(255, 255, 255, 0.06);
  box-shadow: -10px 10px 50px rgba(0, 0, 0, 0.3);
}

/* Era Headers */
.era-header {
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 2px solid rgba(255, 255, 255, 0.1);
}

.era-period {
  display: inline-block;
  font-size: 0.9rem;
  font-weight: 600;
  color: #64ffda;
  background: rgba(100, 255, 218, 0.1);
  padding: 0.3rem 1rem;
  border-radius: 20px;
  margin-bottom: 0.8rem;
}

.era-title {
  font-size: 1.4rem;
  font-weight: 700;
  color: #fff;
  margin: 0;
  line-height: 1.3;
}

/* Event Details */
.event-details {
  position: relative;
}

.timeline-year {
  font-size: 1.1rem;
  font-weight: 600;
  color: #64ffda;
  margin-bottom: 0.8rem;
  display: inline-block;
  background: rgba(100, 255, 218, 0.1);
  padding: 0.3rem 0.8rem;
  border-radius: 15px;
}

.event-details h4 {
  font-size: 1.3rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: 1rem;
  line-height: 1.4;
}

.event-quote {
  font-style: italic;
  color: #4fc3f7 !important;
  margin-bottom: 1rem !important;
  padding: 1rem 1.2rem;
  border-left: 4px solid #4fc3f7;
  background: linear-gradient(90deg, rgba(79, 195, 247, 0.1), transparent);
  border-radius: 0 10px 10px 0;
  font-size: 1rem;
  position: relative;
}

.event-details p:not(.event-quote) {
  font-size: 1rem;
  line-height: 1.7;
  color: #b8b8b8;
  margin: 0;
}

/* Animations */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Responsive Design */
@media (max-width: 900px) {
  .timeline-container {
    padding: 100px 1.5rem 80px;
  }

  .timeline-title {
    font-size: 1.8rem;
    margin-bottom: 3rem;
  }

  .era-indicators {
    position: sticky !important; /* Ensure sticky on desktop */
    gap: 0.5rem;
    padding: 0.8rem;
    top: 90px !important;
  }

  .era-indicator {
    padding: 0.6rem 0.8rem;
  }

  .era-label {
    font-size: 0.7rem;
  }

  .timeline-track {
    padding-right: 0.5rem;
  }

  .timeline-content {
    margin-left: 60px;
    padding: 1.5rem;
  }

  .timeline-marker {
    left: 18px;
    width: 18px;
    height: 18px;
  }
}

@media (max-width: 768px) and (min-width: 641px) {
  .timeline-container {
    padding: 100px 1rem 60px;
  }

  .timeline-title {
    font-size: 1.6rem;
    margin-bottom: 2.5rem;
  }

  .era-indicators {
    gap: 0.4rem;
    padding: 0.7rem;
    top: 70px;
  }

  .era-indicator {
    padding: 0.5rem 0.6rem;
  }

  .era-label {
    font-size: 0.6rem;
  }
}

@media (max-width: 768px) and (min-width: 641px) {
  .timeline-container {
    padding: 100px 1.2rem 70px;
  }

  .timeline-title {
    font-size: 1.6rem;
    margin-bottom: 2.8rem;
  }

  .era-indicators {
    position: sticky !important;
    gap: 0.4rem;
    padding: 0.7rem;
    top: 80px !important;
  }

  .era-indicator {
    padding: 0.5rem 0.7rem;
  }
}

@media (max-width: 640px) {
  .timeline-container {
    padding: 100px 1rem 60px;
  }

  .timeline-title {
    font-size: 1.5rem;
    margin-bottom: 2.5rem;
  }

  /* Hero section mobile styles */
  .hero-content p {
    margin-left: 1rem;
    margin-right: 1rem;
    padding: 0 0.5rem;
  }

  .era-indicators {
    position: static;
    display: grid !important;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(2, 1fr);
    gap: 1rem;
    padding: 1.5rem;
    margin-bottom: 2rem;
    margin-left: auto;
    margin-right: auto;
    max-width: 95%;
    border-radius: 20px;
    background: rgba(15, 17, 26, 0.95);
    opacity: 1;
    border: 1px solid rgba(100, 255, 218, 0.2);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  }

  .era-indicator {
    padding: 0.8rem 0.4rem;
    flex-direction: column;
    align-items: center;
    text-align: center;
    min-width: auto;
    width: 100%;
    border: 1px solid rgba(100, 255, 218, 0.15);
    border-radius: 12px;
    background: rgba(100, 255, 218, 0.05);
    transition: all 0.3s ease;
  }

  .era-indicator:hover {
    background: rgba(100, 255, 218, 0.1);
    border-color: rgba(100, 255, 218, 0.3);
  }

  .era-indicator.active {
    background: rgba(100, 255, 218, 0.15);
    border-color: rgba(100, 255, 218, 0.4);
    box-shadow: 0 0 15px rgba(100, 255, 218, 0.2);
  }

  .era-dot {
    width: 8px;
    height: 8px;
  }

  .era-label {
    font-size: 0.5rem;
    text-align: center;
  }

  /* Mobile Vertical Navigation - Only show on mobile */
  .mobile-vertical-nav {
    display: none; /* Hidden by default, shown by JS when in timeline */
    position: fixed;
    right: 0.5rem;
    top: 50%;
    transform: translateY(-50%);
    z-index: 100;
    flex-direction: column;
    gap: 0.6rem;
    padding: 0.8rem 0.4rem;
    background: rgba(15, 17, 26, 0.95);
    border: 1px solid rgba(100, 255, 218, 0.2);
    border-radius: 15px;
    backdrop-filter: blur(15px);
    opacity: 0.4;
    visibility: visible;
    transition: opacity 0.3s ease, visibility 0.3s ease, display 0.3s ease;
  }

  .mobile-vertical-nav:hover {
    opacity: 1;
  }

  .mobile-nav-item {
    cursor: pointer;
    padding: 0.5rem 0.3rem;
    border-radius: 8px;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.2rem;
    text-align: center;
  }

  .mobile-nav-item:hover {
    background: rgba(100, 255, 218, 0.1);
  }

  .mobile-nav-item.active {
    background: rgba(100, 255, 218, 0.2);
    box-shadow: 0 0 15px rgba(100, 255, 218, 0.3);
  }

  .mobile-nav-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    display: block;
  }

  .mobile-nav-dot.era-1 {
    background: #ff6b6b;
  }
  .mobile-nav-dot.era-2 {
    background: #4ecdc4;
  }
  .mobile-nav-dot.era-3 {
    background: #45b7d1;
  }
  .mobile-nav-dot.era-4 {
    background: #96ceb4;
  }
  .mobile-nav-dot.era-5 {
    background: #feca57;
  }
  .mobile-nav-dot.era-6 {
    background: #ff9ff3;
  }

  .mobile-nav-label {
    font-size: 0.55rem;
    color: #fff;
    font-weight: 400;
    line-height: 1.1;
    max-width: 50px;
    word-wrap: break-word;
  }

  .timeline-track {
    padding-right: 0.5rem;
  }

  .timeline-track::before {
    left: 25px;
  }

  .timeline-content {
    margin-left: 50px;
    padding: 1.2rem;
    max-width: calc(100vw - 70px);
  }

  .timeline-marker {
    left: 16px;
    width: 16px;
    height: 16px;
  }

  .era-title {
    font-size: 1.2rem;
  }

  .event-details h4 {
    font-size: 1.1rem;
  }

  .event-quote {
    padding: 0.8rem 1rem;
    font-size: 0.9rem;
  }

  .event-details p:not(.event-quote) {
    font-size: 0.9rem;
    line-height: 1.6;
  }

  /* Disable hover effects on mobile to prevent click behavior */
  .timeline-item:hover .timeline-content::before {
    opacity: 0.3; /* Keep default opacity */
  }

  .timeline-item:hover .timeline-content {
    transform: none; /* Remove hover transform */
    background: rgba(255, 255, 255, 0.03); /* Keep default background */
    box-shadow: none; /* Remove hover shadow */
  }
}

@media (max-width: 480px) {
  .timeline-container {
    padding: 80px 0.8rem 60px;
  }

  .timeline-title {
    font-size: 1.3rem;
  }

  .era-indicators {
    padding: 1rem;
    gap: 0.8rem;
    max-width: 98%;
  }

  .era-indicator {
    padding: 0.6rem 0.3rem;
  }

  .era-label {
    font-size: 0.45rem;
  }

  .timeline-track {
    padding-right: 0.3rem;
  }

  .timeline-content {
    margin-left: 45px;
    padding: 1rem;
    max-width: calc(100vw - 60px);
  }

  .timeline-item:hover .timeline-content,
  .timeline-item.active .timeline-content {
    transform: translateX(3px);
  }

  .era-title {
    font-size: 1.1rem;
  }

  .event-details h4 {
    font-size: 1rem;
  }

  .event-quote {
    font-size: 0.85rem;
    padding: 0.6rem 0.8rem;
  }

  .event-details p:not(.event-quote) {
    font-size: 0.85rem;
    line-height: 1.5;
  }
}

/* URL Anatomy Section */
.url-section {
  background: linear-gradient(135deg, #0f111a 0%, #1a1f2e 100%);
  padding: 100px 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
}

.url-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

.section-header {
  text-align: center;
  margin-bottom: 4rem;
}

.section-title {
  font-size: 3rem;
  background: linear-gradient(135deg, #64ffda, #4fc3f7);
  background-clip: text;
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 1rem;
  font-weight: 700;
}

.section-subtitle {
  font-size: 1.2rem;
  color: #b8b8b8;
  margin-bottom: 0;
}

/* URL Anatomy Illustration */
.url-anatomy {
  margin-bottom: 5rem;
}

.url-example {
  background: rgba(15, 17, 26, 0.8);
  border: 1px solid rgba(100, 255, 218, 0.3);
  border-radius: 20px;
  padding: 2rem;
  margin-bottom: 3rem;
  backdrop-filter: blur(20px);
}

.url-display {
  font-family: "Courier New", monospace;
  font-size: 1.4rem;
  line-height: 1.8;
  text-align: center;
  word-break: break-all;
  padding: 1.5rem;
  background: rgba(0, 0, 0, 0.3);
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.url-part {
  position: relative;
  padding: 0.2rem 0.4rem;
  border-radius: 6px;
  transition: all 0.3s ease;
  cursor: pointer;
}

.url-part:hover,
.url-part.highlighted {
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(100, 255, 218, 0.3);
}

.protocol {
  background: rgba(255, 107, 107, 0.2);
  color: #ff6b6b;
}
.domain {
  background: rgba(78, 205, 196, 0.2);
  color: #4ecdc4;
}
.port {
  background: rgba(69, 183, 209, 0.2);
  color: #45b7d1;
}
.path {
  background: rgba(150, 206, 180, 0.2);
  color: #96ceb4;
}
.query {
  background: rgba(254, 202, 87, 0.2);
  color: #feca57;
}
.fragment {
  background: rgba(255, 159, 243, 0.2);
  color: #ff9ff3;
}

/* URL Components Grid */
.url-components {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.component {
  background: rgba(15, 17, 26, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 16px;
  padding: 1.5rem;
  transition: all 0.3s ease;
  backdrop-filter: blur(10px);
}

.component:hover {
  transform: translateY(-5px);
  border-color: rgba(100, 255, 218, 0.4);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.component-icon {
  font-size: 2rem;
  margin-bottom: 1rem;
  text-align: center;
}

.component h3 {
  color: #64ffda;
  margin-bottom: 0.5rem;
  font-size: 1.1rem;
}

.component p {
  color: #b8b8b8;
  line-height: 1.6;
  margin-bottom: 0.5rem;
}

.component p strong {
  color: #fff;
  font-family: "Courier New", monospace;
  background: rgba(0, 0, 0, 0.3);
  padding: 0.2rem 0.4rem;
  border-radius: 4px;
}

/* Interactive URL Analyzer */
.url-analyzer {
  background: rgba(15, 17, 26, 0.8);
  border: 1px solid rgba(100, 255, 218, 0.3);
  border-radius: 20px;
  padding: 2.5rem;
  backdrop-filter: blur(20px);
}

.analyzer-title {
  color: #64ffda;
  font-size: 1.8rem;
  margin-bottom: 0.5rem;
  text-align: center;
}

.analyzer-subtitle {
  color: #b8b8b8;
  text-align: center;
  margin-bottom: 2rem;
}

.url-input-container {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-bottom: 2rem;
}

.url-label {
  color: #64ffda;
  font-weight: 500;
  margin-bottom: 0.5rem;
}

.url-input {
  flex: 1;
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 12px;
  padding: 1rem 1.5rem;
  color: #fff;
  font-size: 1rem;
  transition: all 0.3s ease;
}

.url-input:focus {
  outline: none;
  border-color: #64ffda;
  box-shadow: 0 0 20px rgba(100, 255, 218, 0.3);
}

.analyze-btn {
  background: linear-gradient(135deg, #64ffda, #4fc3f7);
  border: none;
  border-radius: 12px;
  padding: 1rem 2rem;
  color: #0f111a;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  align-self: flex-start;
}

.analyze-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(100, 255, 218, 0.4);
}

/* URL Result Display */
.url-result {
  display: none;
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.5s ease;
}

.url-result.show-result {
  opacity: 1;
  transform: translateY(0);
}

.result-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1rem;
}

.result-item {
  background: rgba(0, 0, 0, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  padding: 1rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.result-label {
  color: #64ffda;
  font-weight: 500;
}

.result-value {
  color: #fff;
  font-family: "Courier New", monospace;
  background: rgba(100, 255, 218, 0.1);
  padding: 0.3rem 0.6rem;
  border-radius: 6px;
  word-break: break-all;
}

/* Mobile Responsive */
@media (max-width: 768px) {
  .section-title {
    font-size: 2.2rem;
  }

  .url-display {
    font-size: 1rem;
  }

  .url-components {
    grid-template-columns: 1fr;
  }

  .url-input-container {
    flex-direction: column;
  }

  .analyze-btn {
    width: 100%;
  }

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

@media (max-width: 640px) {
  .url-section {
    padding: 80px 0;
  }

  .url-container {
    padding: 0 1rem;
  }

  .section-title {
    font-size: 1.8rem;
  }

  .url-example,
  .url-analyzer {
    padding: 1.5rem;
  }
}

/* HTTP Redirections Summary */
.redirections-summary {
  background: rgba(255, 255, 255, 0.02);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(100, 255, 218, 0.1);
  border-radius: 15px;
  padding: 1.5rem;
  margin-top: 2rem;
}

.redirections-summary h3 {
  color: #64ffda;
  margin-bottom: 1rem;
  text-align: center;
}

.redirect-info {
  color: #c9d1d9;
  line-height: 1.8;
  font-size: 1rem;
}

.redirect-code-small {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  border-radius: 12px;
  font-weight: bold;
  font-size: 0.85rem;
  color: white;
  margin-right: 0.5rem;
}

.redirect-code-small.redirect-301 {
  background: linear-gradient(135deg, #ff6b35, #ff8e3c);
}

.redirect-code-small.redirect-302 {
  background: linear-gradient(135deg, #4fc3f7, #29b6f6);
}

/* Mobile Responsive for Redirections */
@media (max-width: 640px) {
  .redirections-summary {
    padding: 1rem;
    margin-top: 1.5rem;
  }

  .redirect-info {
    font-size: 0.9rem;
  }
}

/* Domain Names Section */
.domain-section {
  background: linear-gradient(135deg, #1a1f2e 0%, #0f111a 100%);
  padding: 100px 0;
  min-height: 100vh;
}

.domain-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem 0 2rem;
}

/* DNS Definition */
.dns-definition {
  background: rgba(255, 255, 255, 0.02);
  backdrop-filter: blur(15px);
  border: 1px solid rgba(100, 255, 218, 0.1);
  border-radius: 20px;
  padding: 2.5rem;
  margin-bottom: 3rem;
}

.dns-definition h3 {
  color: #64ffda;
  margin-bottom: 2rem;
  text-align: center;
}

.definition-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
}

.definition-text p {
  color: #c9d1d9;
  line-height: 1.7;
  font-size: 1.1rem;
  margin-bottom: 1.5rem;
}

.dns-example {
  background: rgba(0, 0, 0, 0.3);
  border-radius: 15px;
  padding: 1.5rem;
  text-align: center;
}

.conversion {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 1rem;
  font-family: "Courier New", monospace;
}

.ip-address {
  background: rgba(255, 107, 107, 0.2);
  color: #ff6b6b;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  font-weight: bold;
}

.domain-name {
  background: rgba(100, 255, 218, 0.2);
  color: #64ffda;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  font-weight: bold;
}

.arrow {
  color: #4fc3f7;
  font-size: 1.5rem;
  font-weight: bold;
}

.conversion-label {
  color: #8b949e;
  font-size: 0.9rem;
  margin: 0;
}

.dns-role h4 {
  color: #64ffda;
  margin-bottom: 1rem;
}

.dns-role ul {
  color: #c9d1d9;
  line-height: 1.6;
  padding-left: 1.5rem;
}

.dns-role li {
  margin-bottom: 0.8rem;
}

/* Domain Lifecycle */
.domain-lifecycle {
  margin-bottom: 3rem;
}

.domain-lifecycle h3 {
  color: #64ffda;
  margin-bottom: 2rem;
  text-align: center;
}

.lifecycle-diagram {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr auto 1fr auto auto;
  align-items: center;
  gap: 1rem;
  background: rgba(255, 255, 255, 0.02);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(100, 255, 218, 0.1);
  border-radius: 20px;
  padding: 2rem;
  overflow-x: auto;
}

.lifecycle-step {
  text-align: center;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 15px;
  padding: 1.5rem 1rem;
  transition: all 0.3s ease;
  min-width: 140px;
}

.lifecycle-step:hover {
  transform: translateY(-5px);
  border-color: rgba(100, 255, 218, 0.3);
  background: rgba(255, 255, 255, 0.08);
}

.step-icon {
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.lifecycle-step h4 {
  color: #fff;
  margin-bottom: 0.8rem;
  font-size: 1rem;
}

.lifecycle-step p {
  color: #b8b8b8;
  font-size: 0.85rem;
  line-height: 1.4;
  margin-bottom: 0.8rem;
}

.step-duration {
  display: inline-block;
  background: rgba(100, 255, 218, 0.2);
  color: #64ffda;
  padding: 0.3rem 0.6rem;
  border-radius: 10px;
  font-size: 0.75rem;
  font-weight: bold;
}

.lifecycle-arrow {
  color: #4fc3f7;
  font-size: 1.5rem;
  font-weight: bold;
}

.renewal-arrow {
  color: #feca57;
  font-size: 2rem;
  transform: rotate(-90deg);
}

.renewal-option {
  text-align: center;
  background: rgba(254, 202, 87, 0.1);
  border: 1px solid rgba(254, 202, 87, 0.3);
  border-radius: 15px;
  padding: 1rem;
  margin-left: -1rem;
}

.renewal-option h4 {
  color: #feca57;
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
}

.renewal-option p {
  color: #b8b8b8;
  font-size: 0.8rem;
  margin: 0;
}

/* Domain Actors */
.domain-actors {
  margin-bottom: 3rem;
}

.domain-actors h3 {
  color: #64ffda;
  margin-bottom: 2rem;
  text-align: center;
}

.actors-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.actor-card {
  background: rgba(255, 255, 255, 0.02);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 15px;
  padding: 1.5rem 1.5rem 1.5rem 2.5rem;
  transition: all 0.3s ease;
}

.actor-card:hover {
  transform: translateY(-5px);
  border-color: rgba(100, 255, 218, 0.3);
  background: rgba(255, 255, 255, 0.05);
}

.actor-icon {
  font-size: 2.5rem;
  text-align: center;
  margin-bottom: 1rem;
}

.actor-card h4 {
  color: #64ffda;
  margin-bottom: 0.5rem;
  text-align: center;
}

.actor-role {
  color: #8b949e;
  font-size: 0.9rem;
  text-align: center;
  margin-bottom: 1rem;
  font-style: italic;
}

.actor-card ul {
  color: #c9d1d9;
  line-height: 1.6;
  padding-left: 1.5rem;
}

.actor-card li {
  margin-bottom: 0.5rem;
}

/* Actor-specific colors */
.icann-card:hover {
  border-color: rgba(255, 107, 107, 0.4);
}
.registry-card:hover {
  border-color: rgba(78, 205, 196, 0.4);
}
.registrar-card:hover {
  border-color: rgba(69, 183, 209, 0.4);
}
.user-card:hover {
  border-color: rgba(254, 202, 87, 0.4);
}

/* Domain Structure */
.domain-structure {
  background: rgba(255, 255, 255, 0.02);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(100, 255, 218, 0.1);
  border-radius: 20px;
  padding: 2rem;
}

.domain-structure h3 {
  color: #64ffda;
  margin-bottom: 2rem;
  text-align: center;
}

.hierarchy-example {
  text-align: center;
}

.domain-breakdown {
  font-family: "Courier New", monospace;
  font-size: 1.8rem;
  margin-bottom: 1.5rem;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.2rem;
}

.part {
  padding: 0.5rem 0.8rem;
  border-radius: 8px;
  font-weight: bold;
}

.subdomain {
  background: rgba(255, 107, 107, 0.2);
  color: #ff6b6b;
}
.domain {
  background: rgba(78, 205, 196, 0.2);
  color: #4ecdc4;
}
.tld {
  background: rgba(69, 183, 209, 0.2);
  color: #45b7d1;
}
.root {
  background: rgba(150, 206, 180, 0.2);
  color: #96ceb4;
}

.dot {
  color: #fff;
  font-size: 2rem;
}

.dot.invisible {
  opacity: 0.3;
}

.breakdown-labels {
  display: flex;
  justify-content: center;
  gap: 2rem;
}

.label {
  color: #8b949e;
  font-size: 0.9rem;
  font-weight: 500;
}

/* Mobile Responsive for Domain Section */
@media (max-width: 768px) {
  .domain-container {
    padding: 0 1rem;
  }

  .definition-content {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .definition-text p {
    font-size: 1rem;
    line-height: 1.6;
  }

  .dns-example {
    padding: 1rem;
    margin: 0;
  }

  .conversion {
    flex-direction: column;
    gap: 0.8rem;
    font-size: 0.9rem;
  }

  .ip-address,
  .domain-name {
    padding: 0.4rem 0.8rem;
    word-break: break-all;
  }

  .lifecycle-diagram {
    grid-template-columns: 1fr;
    gap: 1rem;
    text-align: center;
  }

  .lifecycle-arrow {
    transform: rotate(90deg);
  }

  .renewal-arrow {
    transform: rotate(0deg);
  }

  .actors-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .domain-breakdown {
    flex-direction: column;
    font-size: 1.2rem;
    gap: 0.5rem;
  }

  .breakdown-labels {
    flex-direction: column;
    gap: 0.5rem;
  }

  .dns-definition,
  .domain-structure {
    padding: 1.5rem;
  }
}

@media (max-width: 640px) {
  .domain-section {
    padding: 80px 0;
  }

  .lifecycle-step {
    padding: 1rem 0.8rem;
    min-width: auto;
  }

  .actor-card {
    padding: 1rem 1rem 1rem 1.5rem;
  }

  .actor-card ul {
    padding-left: 1.2rem;
  }

  .domain-breakdown {
    font-size: 1rem;
  }
}

/* Web Standards Section */
.standards-section {
  background: linear-gradient(135deg, #0f111a 0%, #1a1f2e 50%, #2a2f3e 100%);
  padding: 100px 0;
  min-height: 100vh;
}

.standards-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* Organizations */
.standards-organizations {
  margin-bottom: 4rem;
}

.standards-organizations h3 {
  color: #64ffda;
  margin-bottom: 2rem;
  text-align: center;
}

.organizations-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}

.org-card {
  background: rgba(255, 255, 255, 0.02);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 20px;
  padding: 2rem;
  text-align: center;
  transition: all 0.3s ease;
}

.org-card:hover {
  transform: translateY(-8px);
  background: rgba(255, 255, 255, 0.05);
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.3);
}

.org-logo {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.org-card h4 {
  color: #64ffda;
  font-size: 1.8rem;
  margin-bottom: 0.5rem;
  font-weight: bold;
}

.org-full-name {
  color: #8b949e;
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
  font-style: italic;
}

.org-details p {
  color: #c9d1d9;
  margin-bottom: 0.8rem;
  line-height: 1.6;
}

.org-standards {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
  margin-top: 1rem;
}

.standard-tag {
  background: rgba(100, 255, 218, 0.2);
  color: #64ffda;
  padding: 0.3rem 0.8rem;
  border-radius: 15px;
  font-size: 0.8rem;
  font-weight: 500;
}

/* Organization specific hover colors */
.w3c-card:hover {
  border-color: rgba(255, 107, 107, 0.4);
}
.ietf-card:hover {
  border-color: rgba(78, 205, 196, 0.4);
}
.ecma-card:hover {
  border-color: rgba(254, 202, 87, 0.4);
}
.iso-card:hover {
  border-color: rgba(69, 183, 209, 0.4);
}

/* Standards Importance */
.standards-importance {
  margin-bottom: 4rem;
}

.standards-importance h3 {
  color: #64ffda;
  margin-bottom: 2rem;
  text-align: center;
}

.importance-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.benefit-card {
  background: rgba(255, 255, 255, 0.03);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(100, 255, 218, 0.1);
  border-radius: 15px;
  padding: 1.5rem;
  text-align: center;
  transition: all 0.3s ease;
}

.benefit-card:hover {
  transform: translateY(-5px);
  border-color: rgba(100, 255, 218, 0.3);
  background: rgba(255, 255, 255, 0.06);
}

.benefit-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.benefit-card h4 {
  color: #64ffda;
  margin-bottom: 0.8rem;
}

.benefit-card p {
  color: #c9d1d9;
  line-height: 1.6;
  margin: 0;
}

/* Chaos Example */
.chaos-example {
  background: rgba(255, 255, 255, 0.02);
  backdrop-filter: blur(15px);
  border: 1px solid rgba(255, 107, 107, 0.2);
  border-radius: 20px;
  padding: 2.5rem;
  margin-bottom: 4rem;
}

.chaos-example h3 {
  color: #ff6b6b;
  margin-bottom: 2rem;
  text-align: center;
}

.chaos-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
}

.chaos-scenario h4 {
  color: #ff6b6b;
  margin-bottom: 1.5rem;
  text-align: center;
}

.chaos-points {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.chaos-point {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  background: rgba(255, 107, 107, 0.1);
  padding: 1rem;
  border-radius: 12px;
  border-left: 3px solid #ff6b6b;
}

.chaos-icon {
  font-size: 1.5rem;
  flex-shrink: 0;
  margin-top: 0.2rem;
}

.chaos-text {
  color: #c9d1d9;
  line-height: 1.5;
}

.reality-check h4 {
  color: #4ecdc4;
  margin-bottom: 1.5rem;
  text-align: center;
}

.reality-points {
  background: rgba(78, 205, 196, 0.1);
  padding: 1.5rem;
  border-radius: 12px;
  border-left: 3px solid #4ecdc4;
}

.reality-points p {
  color: #c9d1d9;
  line-height: 1.6;
  margin-bottom: 0.8rem;
}

.reality-points p:last-child {
  margin-bottom: 0;
}

/* Standards Timeline */
.standards-timeline h3 {
  color: #64ffda;
  margin-bottom: 3rem;
  text-align: center;
}

.timeline-line {
  position: relative;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding: 2rem 0;
}

.timeline-line::before {
  content: "";
  position: absolute;
  top: 4rem;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(
    90deg,
    transparent 0%,
    #64ffda 15%,
    #4fc3f7 50%,
    #64ffda 85%,
    transparent 100%
  );
  border-radius: 2px;
  z-index: 1;
}

.timeline-milestone {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  flex: 1;
  z-index: 2;
}

.milestone-dot {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: linear-gradient(135deg, #64ffda, #4fc3f7);
  border: 4px solid #0f111a;
  margin-bottom: 1.5rem;
  transition: all 0.3s ease;
  position: relative;
  z-index: 3;
}

.milestone-dot:hover {
  transform: scale(1.3);
  box-shadow: 0 0 20px rgba(100, 255, 218, 0.6);
}

.milestone-content {
  text-align: center;
  background: rgba(255, 255, 255, 0.03);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 15px;
  padding: 1.5rem;
  transition: all 0.3s ease;
  max-width: 180px;
}

.milestone-content:hover {
  transform: translateY(-5px);
  border-color: rgba(100, 255, 218, 0.3);
  background: rgba(255, 255, 255, 0.06);
}

.milestone-year {
  background: rgba(100, 255, 218, 0.2);
  color: #64ffda;
  padding: 0.4rem 0.8rem;
  border-radius: 15px;
  font-weight: bold;
  font-size: 0.9rem;
  display: inline-block;
  margin-bottom: 0.8rem;
}

.milestone-content h4 {
  color: #fff;
  margin-bottom: 0.5rem;
  font-size: 1.1rem;
}

.milestone-content p {
  color: #8b949e;
  font-size: 0.85rem;
  line-height: 1.4;
  margin: 0;
}

/* Mobile Responsive for Standards */
@media (max-width: 768px) {
  .standards-container {
    padding: 0 1rem;
  }

  .organizations-grid,
  .importance-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .chaos-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .timeline-line {
    flex-direction: column;
    align-items: flex-start;
    padding: 0 2rem;
  }

  .timeline-line::before {
    top: 0;
    bottom: 0;
    left: 2.5rem;
    right: auto;
    width: 4px;
    height: auto;
    background: linear-gradient(
      180deg,
      transparent 0%,
      #64ffda 15%,
      #4fc3f7 50%,
      #64ffda 85%,
      transparent 100%
    );
  }

  .timeline-milestone {
    flex-direction: row;
    align-items: flex-start;
    width: 100%;
    margin-bottom: 2rem;
  }

  .milestone-dot {
    margin-bottom: 0;
    margin-right: 1.5rem;
    flex-shrink: 0;
    margin-top: 1rem;
  }

  .milestone-content {
    max-width: none;
    flex: 1;
  }

  .org-card,
  .benefit-card,
  .chaos-example {
    padding: 1.5rem;
  }
}

@media (max-width: 640px) {
  .standards-section {
    padding: 80px 0;
  }

  .timeline-line {
    padding: 0 1rem;
  }

  .timeline-line::before {
    left: 1.5rem;
  }

  .milestone-dot {
    margin-right: 1rem;
    width: 16px;
    height: 16px;
  }

  .milestone-content {
    padding: 1rem;
  }

  .org-card {
    padding: 1rem;
  }

  .org-standards {
    flex-direction: column;
    align-items: center;
  }
}

/* Security Section */
.security-section {
  background: linear-gradient(135deg, #1a1f2e 0%, #2a1f2e 50%, #1a1f2e 100%);
  padding: 100px 0;
  min-height: 100vh;
}

.security-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* Attacks Section */
.attacks-section {
  margin-bottom: 4rem;
}

.attacks-section h3 {
  color: #ff6b6b;
  margin-bottom: 2rem;
  text-align: center;
}

.attacks-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}

.attack-card {
  background: rgba(255, 107, 107, 0.05);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 107, 107, 0.2);
  border-radius: 20px;
  padding: 2rem;
  transition: all 0.3s ease;
}

.attack-card:hover {
  transform: translateY(-8px);
  background: rgba(255, 107, 107, 0.08);
  border-color: rgba(255, 107, 107, 0.4);
  box-shadow: 0 15px 40px rgba(255, 107, 107, 0.1);
}

.attack-icon {
  font-size: 3rem;
  text-align: center;
  margin-bottom: 1rem;
}

.attack-card h4 {
  color: #ff6b6b;
  font-size: 1.5rem;
  margin-bottom: 0.8rem;
  text-align: center;
}

.attack-description {
  color: #c9d1d9;
  text-align: center;
  margin-bottom: 1.5rem;
  font-style: italic;
}

.attack-details p {
  color: #c9d1d9;
  margin-bottom: 0.8rem;
  line-height: 1.6;
}

.attack-examples {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1rem;
}

.example-tag {
  background: rgba(255, 107, 107, 0.2);
  color: #ff8e8e;
  padding: 0.3rem 0.8rem;
  border-radius: 15px;
  font-size: 0.8rem;
  font-weight: 500;
}

/* Practices Section */
.practices-section {
  margin-bottom: 4rem;
}

.practices-section h3 {
  color: #4ecdc4;
  margin-bottom: 2rem;
  text-align: center;
}

.practices-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
}

.practice-card {
  background: rgba(78, 205, 196, 0.05);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(78, 205, 196, 0.2);
  border-radius: 20px;
  padding: 2rem;
  transition: all 0.3s ease;
}

.practice-card:hover {
  transform: translateY(-8px);
  background: rgba(78, 205, 196, 0.08);
  border-color: rgba(78, 205, 196, 0.4);
  box-shadow: 0 15px 40px rgba(78, 205, 196, 0.1);
}

.practice-icon {
  font-size: 3rem;
  text-align: center;
  margin-bottom: 1rem;
}

.practice-card h4 {
  color: #4ecdc4;
  font-size: 1.5rem;
  margin-bottom: 0.8rem;
  text-align: center;
}

.practice-description {
  color: #c9d1d9;
  text-align: center;
  margin-bottom: 1.5rem;
  font-style: italic;
}

.practice-benefits,
.password-rules,
.twofa-methods,
.update-types {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.benefit-item,
.rule-item,
.method-item,
.update-item {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  color: #c9d1d9;
  font-size: 0.9rem;
}

.benefit-icon,
.rule-icon,
.method-icon,
.update-icon {
  font-size: 1.2rem;
}

/* Security Tips */
.security-tips h3 {
  color: #64ffda;
  margin-bottom: 2rem;
  text-align: center;
}

.tips-container {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.tip-card {
  background: rgba(255, 255, 255, 0.03);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(100, 255, 218, 0.2);
  border-radius: 15px;
  padding: 1.5rem;
  display: flex;
  gap: 1rem;
  transition: all 0.3s ease;
}

.tip-card:hover {
  transform: translateY(-5px);
  border-color: rgba(100, 255, 218, 0.4);
  background: rgba(255, 255, 255, 0.06);
}

.tip-number {
  background: linear-gradient(135deg, #64ffda, #4fc3f7);
  color: #0f111a;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.tip-content h4 {
  color: #64ffda;
  margin-bottom: 0.5rem;
}

.tip-content p {
  color: #c9d1d9;
  line-height: 1.6;
  margin: 0;
}

/* Mobile Responsive for Security */
@media (max-width: 768px) {
  .security-container {
    padding: 0 1rem;
  }

  .attacks-grid,
  .practices-grid,
  .tips-container {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .attack-card,
  .practice-card {
    padding: 1.5rem;
  }

  .tip-card {
    flex-direction: column;
    text-align: center;
  }

  .tip-number {
    align-self: center;
  }
}

@media (max-width: 640px) {
  .security-section {
    padding: 80px 0;
  }

  .attack-card,
  .practice-card,
  .tip-card {
    padding: 1rem;
  }

  .attack-examples,
  .twofa-methods,
  .update-types {
    justify-content: center;
    text-align: center;
  }
}

/* Footer */
.main-footer {
  background: linear-gradient(135deg, #0f111a 0%, #1a1f2e 100%);
  border-top: 1px solid rgba(100, 255, 218, 0.2);
  padding: 3rem 0 1.5rem;
  margin-top: 2rem;
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
}

.footer-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  margin-bottom: 2rem;
}

.footer-info {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.school-info,
.author-info {
  background: rgba(255, 255, 255, 0.03);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(100, 255, 218, 0.1);
  border-radius: 15px;
  padding: 1.5rem;
  transition: all 0.3s ease;
}

.school-info:hover,
.author-info:hover {
  border-color: rgba(100, 255, 218, 0.3);
  background: rgba(255, 255, 255, 0.05);
}

.school-info h4,
.author-info h4 {
  color: #64ffda;
  margin-bottom: 0.5rem;
  font-size: 1.2rem;
}

.school-info p,
.author-info p {
  color: #b8b8b8;
  margin: 0;
  font-size: 0.9rem;
}

.footer-sources {
  background: rgba(255, 255, 255, 0.02);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 15px;
  padding: 2rem;
}

.footer-sources h4 {
  color: #64ffda;
  margin-bottom: 1.5rem;
  text-align: center;
}

.sources-list {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.sources-list a {
  color: #c9d1d9;
  text-decoration: none;
  padding: 0.8rem;
  border-radius: 8px;
  transition: all 0.3s ease;
  font-size: 0.9rem;
  border-left: 3px solid transparent;
}

.sources-list a:hover {
  color: #64ffda;
  background: rgba(100, 255, 218, 0.1);
  border-left-color: #64ffda;
  transform: translateX(5px);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-bottom p {
  color: #8b949e;
  margin: 0;
  font-size: 0.85rem;
}

.footer-tech {
  color: #64ffda;
  font-size: 0.8rem;
  font-weight: 500;
}

.footer-tech span {
  background: rgba(100, 255, 218, 0.1);
  padding: 0.3rem 0.8rem;
  border-radius: 15px;
}

/* Footer Mobile Responsive */
@media (max-width: 768px) {
  .footer-container {
    padding: 0 1rem;
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .footer-info {
    gap: 1rem;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
    gap: 0.8rem;
  }

  .school-info,
  .author-info,
  .footer-sources {
    padding: 1rem;
  }
}

@media (max-width: 640px) {
  .main-footer {
    padding: 2rem 0 1rem;
  }

  .footer-bottom p,
  .footer-tech {
    font-size: 0.8rem;
  }

  .sources-list a {
    font-size: 0.85rem;
    padding: 0.6rem;
  }
}