/* ===========================
   RESET & BASE STYLES
=========================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-padding-top: 80px; /* Matches header height */
}

body {
  font-family: 'Poppins', sans-serif;
  line-height: 1.6;
  scroll-behavior: smooth;
  background-color: #f9fbff;
  background-image: url('https://www.transparenttextures.com/patterns/cubes.png');
  background-repeat: repeat;
  background-size: 150px 150px;
  color: #333;
  transition: background-color 0.4s ease, color 0.4s ease;

}

main {
  flex: 1; /* Push footer to bottom */
}

/* Spacer to avoid content hiding behind sticky header */
#top-spacer {
  height: 70px; /* Same as header height */
  width: 100%;
}

/* ===========================
   NAVBAR
=========================== */
header {
  background: #1e3a8a;
  color: white;
  padding: 18px 30px;
  position: sticky;
  top: 0;
  z-index: 1000;
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
  height: 70px;
}

nav {
  display: flex;
  gap: 40px;
  align-items: center;
}

nav h1 {
  font-weight: 600;
  font-size: 1.6rem;
  white-space: nowrap;
}

nav ul {
  list-style: none;
  display: flex;
  gap: 25px;
}

nav ul li a {
  color: white;
  text-decoration: none;
  font-weight: 500;
  font-size: 1rem;
  padding: 6px 4px;
  border-radius: 4px;
  transition: background-color 0.3s ease, color 0.3s ease;
}

nav ul li a:hover,
nav ul li a[aria-current="page"] {
  background-color: #3b82f6;
  color: white;
  text-decoration: none;
}

/* Toggle button */
#toggle-btn {
  background: transparent;
  border: 2px solid white;
  color: white;
  padding: 6px 14px;
  border-radius: 20px;
  font-weight: 600;
  cursor: pointer;
  font-size: 0.9rem;
  transition: background-color 0.3s ease, color 0.3s ease;
  white-space: nowrap;
}
#toggle-btn:hover {
  background: white;
  color: #1e3a8a;
}

/* ===========================
   SECTIONS GENERAL
=========================== */
.section {
  padding: 60px 20px;
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
  border-bottom: 1px solid rgba(224, 224, 224, 0.4);
  transition: background-color 0.4s ease, color 0.4s ease;
}

.section:nth-child(even) {
  background: linear-gradient(135deg, #f0f4ff, #ffffff);
}

.section h2 {
  font-size: 2rem;
  margin-bottom: 20px;
  color: #1e3a8a;
  border-bottom: 3px solid #1e3a8a;
  padding-bottom: 5px;
  display: inline-block;
  transition: color 0.3s ease, border-color 0.3s ease;
}

/* ===========================
   HOME SECTION
=========================== */
.home-container {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 30px;
  max-width: 700px;
  margin: 0 auto;
}

.profile-pic {
  width: 160px;
  height: 160px;
  border-radius: 50%;
  border: 3px solid #1e3a8a;
  object-fit: cover;
  flex-shrink: 0;
}

.home-text {
  max-width: 480px;
  text-align: left;
  color: #333;
  font-size: 1.1rem;
}

/* ===========================
   SKILLS
=========================== */
.skills-container {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

.skill {
  background: #e0e7ff;
  color: #1e3a8a;
  padding: 8px 16px;
  border-radius: 20px;
  font-weight: 600;
  font-size: 1rem;
  box-shadow: 0 2px 5px rgba(0,0,0,0.05);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  cursor: default;
}
.skill:hover {
  transform: scale(1.1);
  box-shadow: 0 4px 10px rgba(30, 58, 138, 0.3);
}

/* ===========================
   PROJECTS
=========================== */
/* Uniform card heights using grid auto rows and flex */
.projects-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 25px;
  grid-auto-rows: 1fr; /* make rows equal height */
}

.project-card {
  background: white;
  padding: 25px 20px;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.08);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  display: flex;
  flex-direction: column;
  height: 100%; /* stretch to fill grid cell */
}
.project-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 10px 25px rgba(30, 58, 138, 0.3);
}
.project-card h3 {
  font-size: 1.25rem;
  margin-bottom: 10px;
  color: #1e3a8a;
  /* Dark mode override in body.dark */
}
.project-card p {
  font-size: 1rem;
  color: #444;
  /* Dark mode override in body.dark */
}
.project-card a {
  display: inline-block;
  margin-top: auto; /* push link to bottom */
  color: #1e3a8a;
  text-decoration: none;
  font-weight: 600;
  font-size: 1rem;
  transition: color 0.3s ease;
}
.project-card a:hover {
  text-decoration: underline;
  color: #3b82f6;
}

/* ===========================
   ACHIEVEMENTS
=========================== */
.achievements-list {
  max-width: 700px;
  margin: 0 auto 20px auto;
  padding-left: 0;
  list-style-type: none;
  text-align: left;
}

.achievements-list li {
  list-style: none;
  margin-left: 0;
  background: #e0e7ff;
  color: #1e3a8a;
  padding: 14px 18px;
  border-radius: 8px;
  margin-bottom: 14px;
  font-weight: 600;
  font-size: 1rem;
  box-shadow: 0 2px 6px rgba(0,0,0,0.05);
  transition: transform 0.3s ease, background 0.3s ease;
  cursor: default;
}
.achievements-list li:hover {
  transform: translateX(5px);
  background: #d4defc;
}

/* ===========================
   BUTTONS
=========================== */
.btn {
  display: inline-block;
  margin-top: 15px;
  padding: 12px 28px;
  background: #1e3a8a;
  color: white;
  border-radius: 6px;
  text-decoration: none;
  cursor: pointer;
  font-weight: 600;
  font-size: 1.1rem;
  transition: background-color 0.3s ease;
}
.btn:hover {
  background: #163172;
}

/* Animated Resume Button */
.resume-btn {
  background: linear-gradient(90deg, #1e3a8a, #3b82f6);
  color: white;
  border: none;
  padding: 14px 32px;
  border-radius: 30px;
  font-size: 1.1rem;
  font-weight: 700;
  text-decoration: none;
  display: inline-block;
  position: relative;
  overflow: hidden;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.resume-btn:hover {
  transform: translateY(-4px);
  box-shadow: 0 5px 14px rgba(59, 130, 246, 0.5);
}
.resume-btn::after {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: rgba(255, 255, 255, 0.2);
  transition: left 0.4s ease;
  pointer-events: none;
}
.resume-btn:hover::after {
  left: 100%;
}

/* ===========================
   SOCIAL LINKS & BADGES
=========================== */
.social-links {
  display: flex;
  justify-content: center;
  gap: 20px;
  margin-top: 20px;
  flex-wrap: wrap;
}

.social-links a {
  display: inline-block;
}

.social-links a img {
  height: 44px;
  width: auto;
  filter: drop-shadow(0 1px 1px rgba(0,0,0,0.15));
  transition: transform 0.3s ease, filter 0.3s ease, box-shadow 0.3s ease;
  border-radius: 8px;
  box-shadow: 0 1px 6px rgba(0,0,0,0.1);
  transform-origin: center;
  transform: scale(1);
}

.social-links a:hover {
  cursor: pointer;
}

.social-links a:hover img {
  transform: scale(1.12);
  filter: drop-shadow(0 2px 5px rgba(30,58,138,0.5));
  box-shadow: 0 5px 16px rgba(30,58,138,0.5);
}

.social-links a:focus img {
  outline: 2px solid #1e3a8a;
  outline-offset: 4px;
}

@media (max-width: 400px) {
  .social-links a img {
    height: 36px;
  }
}

/* ===========================
   FOOTER
=========================== */
footer {
  background: #1e3a8a;
  color: white;
  text-align: center;
  padding: 10px;
  margin-top: 20px;
  font-size: 1rem;
}

/* ===========================
   DARK MODE - SOFT BLENDING
=========================== */
body.dark {
  background-color: #18181b;
  color: #e5e7eb; /* Better default text */
  position: relative;
}

body.dark::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  pointer-events: none;
  background-image: url('https://www.transparenttextures.com/patterns/cubes.png');
  background-repeat: repeat;
  background-size: 150px 150px;
  opacity: 0.15;
  mix-blend-mode: screen;
  z-index: 9999;
}

/* Keep your original navbar dark mode */
body.dark header {
  background-color: #1e3a8a;
  color: #ddd;
  box-shadow: 0 2px 10px rgba(255, 255, 255, 0.1);
}

body.dark nav ul li a {
  color: #ddd;
}

body.dark nav ul li a:hover,
body.dark nav ul li a[aria-current="page"] {
  background-color: #2563eb;
  color: #f0f9ff;
}

body.dark #toggle-btn {
  border-color: #ccc;
  color: #ccc;
}
body.dark #toggle-btn:hover {
  background-color: #ccc;
  color: #0f172a;
}

body.dark .section:nth-child(even) {
  background: #111827;
  color: #e5e7eb;
}

body.dark .section {
  border-color: #333;
}

body.dark .section h2 {
  color: #93c5fd; /* Better contrast */
  border-color: #93c5fd;
}

body.dark .home-text {
  color: #e5e7eb; /* Better visibility */
}

body.dark .skill {
  background: #334155; /* Better contrast */
  color: #f1f5f9;
}

/* Dark mode fixes for project cards */
body.dark .project-card {
  background: #111827;
  box-shadow: 0 4px 20px rgba(255, 255, 255, 0.05);
  color: #ddd;
}

/* Project title and links brighter for better visibility */
body.dark .project-card h3,
body.dark .project-card a {
  color: #93c5fd;
}

body.dark .project-card p {
  color: #d1d5db;
}

body.dark .project-card:hover {
  box-shadow: 0 8px 35px rgba(37, 99, 235, 0.7);
}

body.dark .achievements-list li {
  background: #1e293b;
  color: #cbd5e1;
}

body.dark .btn, body.dark .resume-btn {
  background: #2563eb;
  color: #f0f9ff;
}
body.dark .btn:hover, body.dark .resume-btn:hover {
  background: #1e40af;
}

body.dark .social-links a img {
  filter: brightness(1.2);
}

/* ===========================
   BACK TO TOP BUTTON
=========================== */
#back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background-color: #1e3a8a;
  color: white;
  border: none;
  padding: 10px 15px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1.3rem;
  box-shadow: 0 4px 8px rgba(30, 58, 138, 0.6);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
  z-index: 2000;
}
#back-to-top.show {
  opacity: 1;
  visibility: visible;
}
#back-to-top:hover {
  background-color: #3b82f6;
  box-shadow: 0 6px 14px rgba(59, 130, 246, 0.8);
}

/* ===========================
   RESPONSIVE
=========================== */
/* @media (max-width: 768px) {
  header {
    flex-wrap: wrap;
    height: auto;
    padding: 15px 20px;
  }
  nav {
    gap: 20px;
    flex-wrap: wrap;
    justify-content: center;
    width: 100%;
  }
  nav h1 {
    flex-basis: 100%;
    text-align: center;
    margin-bottom: 10px;
  }
  nav ul {
    justify-content: center;
    flex-basis: 100%;
  }
  #toggle-btn {
    margin-top: 10px;
    flex-basis: 100%;
    justify-self: center;
  }
  .home-container {
    flex-direction: column;
    text-align: center;
  }
  .home-text {
    max-width: 100%;
  }
  .skills-container {
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .project-card {
    padding: 18px 15px;
  }
  nav ul li a {
    font-size: 0.9rem;
    padding: 6px 6px;
  }
}
 */
/* ===========================
   RESPONSIVE (Updated)
=========================== */
@media (max-width: 768px) {
  header {
    flex-wrap: wrap;
    height: auto;
    padding: 15px 20px;
  }
  nav {
    gap: 20px;
    flex-wrap: wrap;
    justify-content: center;
    width: 100%;
  }
  nav h1 {
    flex-basis: 100%;
    text-align: center;
    margin-bottom: 10px;
    font-size: 1.4rem; /* ✅ Slightly smaller for tablets */
  }
  nav ul {
    justify-content: center;
    flex-basis: 100%;
  }
  nav ul li a {
    font-size: 0.95rem;
    padding: 6px 6px;
  }
  #toggle-btn {
    margin-top: 10px;
    flex-basis: 100%;
    justify-self: center;
  }

  .home-container {
    flex-direction: column;
    text-align: center;
    gap: 20px;
  }
  .home-text {
    max-width: 100%;
    font-size: 1rem; /* ✅ Better fit on tablets */
  }
  .profile-pic {
    width: 130px; /* ✅ Slightly smaller for tablets */
    height: 130px;
  }
  .skills-container {
    justify-content: center;
  }
  .skills-container img {
    height: 40px; /* ✅ Adjust badge size for tablets */
  }
  .projects-container {
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  }
}

@media (max-width: 480px) {
  header {
    padding: 12px 15px;
  }
  nav h1 {
    font-size: 1.2rem; /* ✅ Compact for phones */
  }
  nav ul {
   flex-direction: column; 
   align-items: center;
   gap: 10px;
  }
  nav ul li a {
    font-size: 0.85rem;
    padding: 4px 4px;
  }
  .profile-pic {
    width: 110px; /* ✅ Even smaller for phones */
    height: 110px;
  }
  .home-text {
    font-size: 0.95rem;
    text-align: center;
  }
  .skills-container img {
    height: 32px; /* ✅ Mobile-friendly badge size */
    margin: 0.2rem;
  }
  .skill {
    font-size: 0.85rem;
    padding: 6px 12px;
  }
  .project-card {
    padding: 16px 12px;
    font-size: 0.9rem;
  }
  footer {
    font-size: 0.85rem;
    padding: 8px;
  }
  .social-links a img {
    height: 36px;
  }
}