/* Reset */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  scroll-behavior: smooth;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(135deg, #e6f0ff 60%, #f7faff 40%);
  color: #222;
  display: flex;
  min-height: 100vh;
  overflow-x: hidden;
}

/* Sidebar */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: 200px;
  height: 100vh;
  background-color: #003d99;
  color: #cce0ff;
  display: flex;
  flex-direction: column;
  padding-top: 40px;
  box-shadow: 2px 0 8px rgba(0, 0, 0, 0.1);
  z-index: 1200;
  overflow-y: auto;
}

.nav-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  padding-left: 20px;
  padding-right: 20px;
}

.nav-links li a {
  color: #cce0ff;
  font-weight: 600;
  padding: 8px 15px;
  border-left: 4px solid transparent;
  border-radius: 6px;
  transition: all 0.3s ease;
  display: block;
  text-decoration: none;
  user-select: none;
  font-size: 1.1rem;
}

.nav-links li a:hover {
  background-color: #0050e6;
  color: #fff;
  border-left-color: #80b3ff;
}

.nav-links li a.active {
  background-color: #0047b3;
  color: white;
  font-weight: 700;
  border-left-color: #80b3ff;
}

/* Main content */
.content {
  margin-left: 200px;
  padding: 40px 60px 70px 60px;
  flex-grow: 1;
  min-height: 100vh;
  background: #f7faff;
  box-shadow: inset -15px 0 40px -20px rgba(0, 61, 153, 0.15);
  display: flex;
  flex-direction: column;
  align-items: center; /* center all sections horizontally */
  gap: 40px;
}

/* Section base */
section {
  background: white;
  border-radius: 12px;
  padding: 50px 40px 60px;
  box-shadow: 0 6px 15px rgb(0 0 0 / 0.05);
  width: 700px; /* fixed width for all sections */
  max-width: 90vw; /* responsive limit */
  box-sizing: border-box;
}

/* Scroll offset fix */
section > h2::before,
section > h1::before {
  content: "";
  display: block;
  height: 100px;
  margin-top: -100px;
  visibility: hidden;
  pointer-events: none;
}

/* Home Section */
#home {
  text-align: center;
  padding-top: 80px;
  padding-bottom: 100px;
}

.home-content {
  max-width: 600px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
}

.home-profile-pic {
  width: 170px;
  height: 170px;
  border-radius: 50%;
  border: 4px solid #80b3ff;
  object-fit: cover;
  box-shadow: 0 0 25px #80b3ffaa;
  user-select: none;
  transition: transform 0.3s ease;
}

.home-profile-pic:hover {
  transform: scale(1.05);
}

.home-name {
  font-size: 3rem;
  color: #0047b3;
  font-weight: 900;
  margin: 0;
  white-space: nowrap;
  letter-spacing: 2px;
}

.home-subtitle {
  font-size: 1.3rem;
  color: #333;
  font-weight: 600;
  line-height: 1.5;
  max-width: 90%;
}

.btn {
  background: #0047b3;
  color: white;
  padding: 14px 32px;
  border-radius: 30px;
  font-weight: 600;
  cursor: pointer;
  display: inline-block;
  transition: background 0.3s ease;
  text-decoration: none;
  margin-top: 10px;
  box-shadow: 0 5px 15px rgba(0, 71, 179, 0.3);
}

.btn:hover {
  background: #002966;
  box-shadow: 0 8px 20px rgba(0, 41, 102, 0.5);
}

/* About section spacing */
#about p {
  margin-bottom: 24px;
}

#about .btn {
  margin-top: 24px;
  display: inline-block;
}

/* Skills Grid */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 36px;
  max-width: 1000px;
  margin: 0 auto;
}

.skill-category {
  margin-bottom: 0;
}

.skill-category h3 {
  color: #0047b3;
  margin-bottom: 14px;
  font-weight: 700;
  border-bottom: 3px solid #0047b3;
  display: inline-block;
  padding-bottom: 6px;
}

.skill-category ul {
  list-style: disc inside;
  color: #333;
  font-size: 1.1rem;
}

.skill-category ul li {
  margin-bottom: 10px;
}

/* Education */
.education-item {
  background: #f0f5ff;
  padding: 26px 32px;
  border-radius: 12px;
  box-shadow: 0 3px 14px rgba(0, 71, 179, 0.12);
  max-width: 700px;
  margin: 0 auto 40px;
}

.education-item h3 {
  color: #0047b3;
  font-weight: 700;
  margin-bottom: 10px;
}

.education-item span {
  color: #555;
  font-size: 1rem;
  display: block;
  margin-bottom: 6px;
}

/* Experience */
.experience-item {
  margin-bottom: 30px;
  padding-bottom: 12px;
  border-bottom: 1px solid #ccc;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

.experience-item h3 {
  color: #0047b3;
  margin-bottom: 6px;
}

.experience-item span {
  font-style: italic;
  font-size: 1rem;
  color: #555;
}

.experience-item ul {
  margin-top: 10px;
  color: #444;
  padding-left: 24px;
  font-size: 1rem;
}

/* Achievements & Certifications */
#achievements ul,
#certifications ul {
  list-style: disc inside;
  max-width: 700px;
  color: #444;
  margin: 20px auto 40px;
  font-size: 1rem;
  font-weight: 600;
}

#achievements ul li,
#certifications ul li {
  margin-bottom: 14px;
}

/* Projects */
.project-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 26px;
  max-width: 1000px;
  margin: 0 auto 50px;
}

.project {
  border: 1px solid #ccc;
  padding: 20px 18px;
  border-radius: 12px;
  transition: box-shadow 0.3s ease;
  background: #fff;
}

.project:hover {
  box-shadow: 0 10px 20px rgb(0 71 179 / 0.3);
}

.project h3 {
  margin-bottom: 14px;
  color: #0047b3;
}

.project p {
  font-size: 1rem;
  color: #444;
  line-height: 1.4;
}

.project a {
  margin-top: 12px;
  display: inline-block;
  color: #0047b3;
  font-weight: 700;
  text-decoration: none;
  transition: color 0.3s ease;
}

.project a:hover {
  color: #002966;
}

/* Contact */
.contact-info {
  max-width: 400px;
  margin: 0 auto 60px;
  font-size: 1.1rem;
  color: #222;
  line-height: 1.7;
}

.contact-info p {
  margin-bottom: 18px;
  font-weight: 700;
}

.contact-info a {
  color: #0047b3;
  text-decoration: none;
  transition: color 0.3s ease;
}

.contact-info a:hover {
  color: #002966;
  text-decoration: underline;
}

/* Footer */
footer {
  position: fixed;
  bottom: 0;
  left: 200px; /* Width of sidebar */
  width: calc(100% - 200px);
  background: #003d99;
  color: #cce0ff;
  text-align: center;
  padding: 15px 10px;
  font-size: 0.9rem;
  z-index: 1500;
  box-shadow: 0 -2px 8px rgba(0, 0, 0, 0.15);
}

/* Responsive */
@media (max-width: 900px) {
  .sidebar {
    width: 60px;
    padding-top: 20px;
  }
  .nav-links li a {
    font-size: 0;
    padding: 10px 8px;
    border-left: none;
    border-radius: 0;
    position: relative;
  }
  .nav-links li a::after {
    content: attr(data-title);
    position: absolute;
    left: 70px;
    top: 50%;
    transform: translateY(-50%);
    background: #0047b3;
    color: #fff;
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 0.85rem;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
  }
  .nav-links li a:hover::after {
    opacity: 1;
  }

  .content {
    margin-left: 60px;
    padding: 40px 30px 90px;
  }

  footer {
    left: 60px;
    width: calc(100% - 60px);
  }

  .home-name {
    font-size: 2.5rem;
  }

  .home-profile-pic {
    width: 140px;
    height: 140px;
  }
}


/* ===== Responsive Enhancements ===== */

/* General responsive tweaks */
img, video { max-width: 100%; height: auto; }
section { width: min(100%, 700px); }
.home-name { white-space: normal; }

/* Mobile menu toggle button */
.menu-toggle {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 1600;
  border: none;
  background: #0047b3;
  color: #fff;
  padding: 10px 14px;
  border-radius: 10px;
  font-weight: 700;
  box-shadow: 0 4px 10px rgba(0,0,0,.15);
  display: none; /* default hidden on desktop */
}

/* Backdrop for mobile nav */
.backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.35);
  z-index: 1100;
  opacity: 0;
  pointer-events: none;
  transition: opacity .3s ease;
}
body.nav-open .backdrop {
  opacity: 1;
  pointer-events: auto;
}

/* Off-canvas behavior on tablets/phones */
@media (max-width: 900px) {
  .menu-toggle { display: inline-block; }

  .sidebar {
    width: 240px;
    transform: translateX(-260px);
    transition: transform .3s ease;
    padding-top: 70px; /* space for status bars */
  }
  .sidebar.open {
    transform: translateX(0);
  }

  .nav-links { gap: 1rem; }
  .nav-links li a { font-size: 1rem; padding: 10px 12px; }

  .content {
    margin-left: 0;
    padding: 70px 18px 110px; /* top padding for the menu button area */
  }

  /* Make sections edge-to-edge with comfortable padding */
  section {
    width: 100%;
    padding: 28px 18px 32px;
    border-radius: 10px;
  }

  /* Footer should not be fixed on mobile to avoid overlap */
  footer {
    position: static;
    left: 0;
    width: 100%;
    margin-top: 24px;
  }

  /* Home tweaks */
  .home-name { font-size: 2rem; }
  .home-subtitle { font-size: 1rem; }
  .home-profile-pic { width: 120px; height: 120px; }
}

/* Small phones */
@media (max-width: 480px) {
  .menu-toggle { padding: 8px 12px; border-radius: 8px; }
  .btn { padding: 12px 18px; border-radius: 24px; }
  .skill-category ul { font-size: 1rem; }
  .contact-info { font-size: 1rem; }
}