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

body {
  font-family: 'Poppins', sans-serif;
  background-color: #10151f;
  color: #eaf6ff;
  scroll-behavior: smooth;
}

/* Navbar */
header {
  background-color: #0d1b2a;
  padding: 0.8rem 2rem;
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 100;
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo-title {
  font-size: 2.2rem;
  font-weight: 900;
  color: #00f0ff;
  letter-spacing: 2px;
}

.nav-links {
  display: flex;
  gap: 1.5rem;
  list-style: none;
}

.nav-links li a {
  text-decoration: none;
  color: #eaf6ff;
  font-weight: 600;
  transition: color 0.3s ease;
}

.nav-links li a:hover {
  color: #00f0ff;
}

/* 🔲 Hide checkbox toggle visually */
#menu-toggle {
  display: none;
}

/* 🍔 Hamburger Icon */
.hamburger {
  display: none;
  font-size: 1.8rem;
  color: #eaf6ff;
  cursor: pointer;
}


/* Hero Section Base */
#hero {
  background-image: url('image.png');
  background-size: cover;
  background-position: center;
  position: relative;
  padding: 8rem 2rem 4rem;
  color: #eaf6ff;
}

#hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.55); /* Dark overlay for contrast */
  z-index: 0;
}

/* Content Container */
.hero-content {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  align-items: center;
  position: relative;
  z-index: 1;
  max-width: 1200px;
  margin: 0 auto;
}

/* Left Side: Text */
.hero-text {
  flex: 1;
  min-width: 300px;
}

.hero-text h1 {
  font-size: 2.0rem;
  font-weight: 900;
  color: #66fcf1;
  letter-spacing: 2px;
  margin-bottom: 1rem;
}

.hero-text p {
  font-size: 1.2rem;
  color: #b5daf2;
  margin-bottom: 2rem;
  line-height: 1.6;
}

/* CTA Button */
.cta-button {
  display: inline-block;
  padding: 0.8rem 1.5rem;
  background: linear-gradient(to right, #00f0ff, #66fcf1);
  color: #10151f;
  font-weight: 700;
  border-radius: 6px;
  text-decoration: none;
  box-shadow: 0 4px 12px rgba(0,240,255,0.3);
  transition: transform 0.3s ease;
}

.cta-button:hover {
  box-shadow: 0 0 12px #00f0ff;
  transform: scale(1.05);
}

/* Scroll Cue */
.scroll-cue {
  margin-top: 2rem;
  font-size: 1.5rem;
  color: #66fcf1;
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(8px); }
}

/* Right Side: Image */
.hero-image {
  flex: 1;
  min-width: 300px;
  text-align: center;
}

.hero-image img {
  opacity: 0.85;
  filter: drop-shadow(0 0 12px rgba(0, 240, 255, 0.3));
  max-width: 100%;
  height: auto;
  border-radius: 12px;
  box-shadow: 0 4px 16px rgba(0,240,255,0.2);
}

@media screen and (max-width: 768px) {
  nav {
    flex-direction: column;
    align-items: flex-start;
  }

  .hamburger {
    display: block;
    margin-left: auto;
  }

  .nav-links {
    display: none;
    flex-direction: column;
    width: 100%;
    margin-top: 1rem;
  }

  #menu-toggle:checked + .hamburger + .nav-links {
    display: flex;
  }

  .nav-links li {
    width: 100%;
    padding: 0.8rem 1rem;
    border-top: 1px solid #1c2a3a;
  }

  .hero-content {
    flex-direction: column;
    text-align: center;
  }

  .hero-text, .hero-image {
    min-width: unset;
    width: 100%;
  }

  .hero-text h1 {
    font-size: 1.6rem;
  }

  .hero-text p {
    font-size: 1rem;
  }

  .scroll-cue {
    font-size: 1.2rem;
  }
}



/* visualizer section ------------------------------------------------------------------------------- */

#visualizer {
  position: relative;
  background-image: url('image3.jpg'); /* Your chosen neon swirl */
  background-size: cover;
  background-position: center;
  padding: 6rem 2rem;
  color: #eaf6ff;
  overflow: hidden;
  z-index: 0;
}

.visualizer-overlay {
  position: absolute;
  inset: 0;
  background: rgba(10, 15, 30, 0.7);
  z-index: 1;
}

/* Main container sits above overlay */
.visualizer-container {
  position: relative;
  z-index: 2;
  max-width: 1000px;
  margin: 0 auto;
  padding: 2rem;
  background: rgba(255, 255, 255, 0.02);
  border-radius: 16px;
  box-shadow: 0 0 40px rgba(0, 240, 255, 0.1);
}

/* Text styling */
.visualizer-container h2 {
  font-size: 2.8rem;
  margin-bottom: 0.5rem;
  color: #66fcf1;
  text-shadow: 0 0 12px rgba(102, 252, 241, 0.3);
}

.visualizer-container p {
  font-size: 1.15rem;
  margin-bottom: 2rem;
  color: #b3daf2;
  line-height: 1.6;
}

/* Controls styling */
.controls {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.2rem;
  margin-bottom: 2rem;
}

.controls select,
.controls button,
.slider-control input {
  padding: 0.8rem 1.2rem;
  border-radius: 8px;
  border: none;
  background: #1c2946;
  color: #eaf6ff;
  font-weight: 600;
  box-shadow: 0 2px 8px rgba(0, 240, 255, 0.3);
  transition: all 0.3s ease;
}

.controls button:hover {
  background: #66fcf1;
  color: #10151f;
  transform: scale(1.05);
}

/* Speed slider */
.slider-control {
  display: flex;
  align-items: center;
  gap: 0.6rem;
}

.slider-control input[type="range"] {
  width: 160px;
  accent-color: #00f0ff;
}

/* Sorting bar visuals */
.bars-container {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: 4px;
  height: 320px;
  padding-top: 1rem;
  border-top: 2px dashed #66fcf1;
}

/* Default bar */
.bars-container div {
  background-color: #66fcf1;
  transition: height 0.3s ease, transform 0.2s ease;
}

/* Hover */
.bars-container div:hover {
  transform: scaleY(1.08);
  box-shadow: 0 0 12px rgba(102, 252, 241, 0.6);
}

/* Sorting shimmer animation */
.bars-container.sorting div {
  background: linear-gradient(90deg, #66fcf1 20%, #88f9ff 40%, #66fcf1 60%);
  background-size: 200px 100%;
  animation: shimmer 1.4s infinite linear;
}

@keyframes shimmer {
  0% { background-position: -200px 0; }
  100% { background-position: 200px 0; }
}

/* Compare + Swap classes */
.bar.compare {
  background-color: #00ff88 !important;
  animation: bounce 0.3s ease;
}

.bar.swap {
  background-color: #ff4c4c !important;
  animation: bounce 0.3s ease;
}

@keyframes bounce {
  0% { transform: scaleY(1); }
  50% { transform: scaleY(1.2); }
  100% { transform: scaleY(1); }
}

/* Loading shimmer text */
.loading-indicator {
  display: none;
  font-size: 1rem;
  font-weight: bold;
  margin-top: 1rem;
  color: #66fcf1;
  animation: pulseText 1.2s ease-in-out infinite;
}

@keyframes pulseText {
  0%, 100% { opacity: 0.6; }
  50% { opacity: 1; }
}
.status-text {
  margin-top: 1rem;
  font-size: 1rem;
  font-weight: 600;
  color: #66fcf1;
  text-shadow: 0 0 6px rgba(102, 252, 241, 0.3);
  animation: pulseText 1.2s ease-in-out infinite;
}


/* Sort tip */
.sort-hint {
  margin-top: 1.2rem;
  font-size: 0.95rem;
  font-style: italic;
  color: #88c9e5;
}

/* Responsive Styles */
@media screen and (max-width: 768px) {
  #visualizer {
    padding: 4rem 1.2rem;
    background-position: top;
  }

  .visualizer-container {
    padding: 1.5rem;
    border-radius: 12px;
  }

  .visualizer-container h2 {
    font-size: 1.8rem;
    text-align: center;
  }

  .visualizer-container p {
    font-size: 1rem;
    text-align: center;
  }

  .controls {
    flex-direction: column;
    align-items: stretch;
    gap: 1rem;
  }

  .slider-control {
    flex-direction: column;
    align-items: flex-start;
  }

  .bars-container {
    flex-wrap: wrap;
    gap: 2px;
    height: auto;
    min-height: 200px;
  }

  .bars-container div {
    width: 6px;
  }

  .loading-indicator,
  .status-text,
  .sort-hint {
    font-size: 0.9rem;
    text-align: center;
  }
}


/* Algorithms Section */

#algorithms {
  background-image: url('image\ 4.jpg'); /* Replace with actual file name */
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  position: relative;
  padding: 5rem 2rem;
  color: #eaf6ff;
  overflow: hidden;
  z-index: 0;
}

/* 🌟 Everything inside algo section stays above overlay */
#algorithm-gallery .algo-container {
  position: relative;
  z-index: 2;
  max-width: 1000px;
  margin: auto;
  text-align: center;
}

/* ✨ Heading and intro text */
.algo-container h2 {
  font-size: 2.6rem;
  color: #66fcf1;
  margin-bottom: 0.5rem;
  text-shadow: 0 0 10px rgba(102, 252, 241, 0.3);
}

.algo-container p {
  font-size: 1.15rem;
  color: #b3daf2;
  margin-bottom: 3rem;
}

/* 📦 Cards layout */
.algo-cards {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  justify-content: center;
}

/* 🧠 Individual card */
.algo-card {
  background: rgba(255, 255, 255, 0.06);
  border-radius: 14px;
  padding: 2rem;
  width: 280px;
  box-shadow: 0 0 20px rgba(0,240,255,0.08);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  backdrop-filter: blur(4px);
}

.algo-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 0 30px rgba(102, 252, 241, 0.2);
}

.algo-card h3 {
  font-size: 1.6rem;
  margin-bottom: 1rem;
  color: #88e9ff;
}

.algo-card p {
  font-size: 1rem;
  color: #cdeffd;
  margin-bottom: 1rem;
  line-height: 1.5;
}

/* 🎀 Labels and badges */
.label {
  display: inline-block;
  margin-bottom: 0.5rem;
  padding: 0.5rem 0.8rem;
  background-color: #66fcf1;
  color: #10151f;
  font-size: 0.85rem;
  border-radius: 6px;
  font-weight: 600;
}

.complexity {
  display: block;
  font-size: 0.85rem;
  color: #88e9ff;
  font-style: italic;
  margin-top: 0.3rem;
}

/* 💫 Responsive layout tweaks */
@media (max-width: 768px) {
  .algo-container h2 {
    font-size: 2rem;
  }

  .algo-container p {
    font-size: 1rem;
    margin-bottom: 2rem;
  }

  .algo-cards {
    flex-direction: column;
    align-items: center;
  }

  .algo-card {
    width: 90%;
    padding: 1.5rem;
  }
}

/* 🪐 Even smaller screens */
@media (max-width: 480px) {
  .algo-container h2 {
    font-size: 1.75rem;
  }

  .algo-card h3 {
    font-size: 1.4rem;
  }

  .algo-card p {
    font-size: 0.95rem;
  }

  .label,
  .complexity {
    font-size: 0.8rem;
  }
}

#blog {
  background-color: #010a1b;
  color: #eaf6ff;
  padding: 5rem 2rem;
  font-family: 'Segoe UI', sans-serif;
}

.blog-wrapper {
  max-width: 950px;
  margin: auto;
  text-align: center;
}

.blog-wrapper h2 {
  font-size: 2.5rem;
  color: #94fdf2;
  margin-bottom: 0.5rem;
  text-shadow: 0 0 12px rgba(148, 253, 242, 0.2);
}

.blog-wrapper p {
  font-size: 1.1rem;
  color: #c6e6f2;
  margin-bottom: 3rem;
}

.blog-post {
  background: rgba(255, 255, 255, 0.06);
  border-radius: 12px;
  padding: 2rem;
  margin-bottom: 2rem;
  box-shadow: 0 0 18px rgba(102, 252, 241, 0.08);
  backdrop-filter: blur(3px);
  text-align: left;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.blog-post:hover {
  transform: translateY(-4px);
  box-shadow: 0 0 24px rgba(102, 252, 241, 0.2);
}

.blog-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.blog-day {
  background-color: #66fcf1;
  color: #10151f;
  padding: 0.4rem 0.8rem;
  font-weight: 600;
  border-radius: 6px;
  font-size: 0.85rem;
}

.blog-post h3 {
  font-size: 1.4rem;
  color: #88e9ff;
  margin: 0;
}

.blog-post p {
  font-size: 1rem;
  color: #cdeffd;
  line-height: 1.6;
  margin-bottom: 1rem;
}

.blog-tags {
  font-size: 0.85rem;
  color: #66fcf1;
  font-weight: 600;
}

#about {
  background-color: #0b132b;
  color: #eaf6ff;
  padding: 5rem 2rem;
}
 #about {
  background-image: url('image\ 4.jpg'); /* ✅ Make sure file name & folder match */
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  position: relative;
  padding: 5rem 2rem;
  color: #eaf6ff;
  z-index: 0;
}

/* Optional overlay to soften background contrast */
#about::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(10, 15, 30, 0.4); /* You can adjust opacity */
  z-index: -1;
}




.about-container {
  max-width: 900px;
  margin: auto;
  text-align: center;
  font-family: 'Segoe UI', sans-serif;
}

.about-container h2 {
  font-size: 2.5rem;
  color: #94fdf2;
  margin-bottom: 1rem;
  text-shadow: 0 0 12px rgba(148, 253, 242, 0.2);
}

.about-container p {
  font-size: 1.1rem;
  color: #c6e6f2;
  line-height: 1.7;
  margin-bottom: 1.5rem;
}

.about-tags {
  font-size: 0.95rem;
  font-weight: 600;
  color: #66fcf1;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
  padding-top: 1rem;
}

/* Footer */
footer {
  background-color: #0d1b2a;
  color: #88c9e5;
  text-align: center;
  padding: 2rem;
  font-size: 0.9rem;
  border-top: 1px solid #00f0ff;
}