/* Reset */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'Poppins', sans-serif;
}

html {
  font-size: 16px;
}

h2 {
  font-size: 2.5rem;
  font-weight: 600;
}

h3 {
  font-size: 1.5rem;
  font-weight: 600;
}

/* Variables (Dark Theme - Default) */
:root {
  --bg-color: #121212;
  --bg-pattern: radial-gradient(circle at 10% 20%, rgba(255, 204, 0, 0.05) 0%, transparent 20%), 
                radial-gradient(circle at 90% 80%, rgba(255, 255, 255, 0.05) 0%, transparent 20%);
  --text-color: #f1f1f1;
  --text-muted: #b0b0b0;
  --accent-color: #FFCC00;
  
  --glass-bg: rgba(255, 255, 255, 0.03);
  --glass-border: rgba(255, 255, 255, 0.1);
  --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.4);
  --hover-shadow: 0 10px 30px -10px rgba(255, 204, 0, 0.3);
  
  --nav-bg: rgba(18, 18, 18, 0.7);
}

/* Light Theme Variables */
[data-theme="light"] {
  --bg-color: #f5f5f7;
  --bg-pattern: radial-gradient(circle at 10% 20%, rgba(255, 204, 0, 0.1) 0%, transparent 20%), 
                radial-gradient(circle at 90% 80%, rgba(0, 0, 0, 0.03) 0%, transparent 20%);
  --text-color: #1a1a1a;
  --text-muted: #555555;
  --accent-color: #e69900; /* enhanced richer yellow for better contrast */
  
  --glass-bg: rgba(255, 255, 255, 0.6);
  --glass-border: rgba(255, 255, 255, 0.5);
  --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.07);
  --hover-shadow: 0 10px 30px -10px rgba(212, 170, 0, 0.4);
  
  --nav-bg: rgba(245, 245, 247, 0.7);
}

/* Body */
body {
  background-color: var(--bg-color);
  background-image: var(--bg-pattern);
  background-attachment: fixed;
  color: var(--text-color);
  line-height: 1.6;
  transition: background-color 0.5s ease, color 0.5s ease;
  position: relative;
  overflow-x: hidden;
}

/* Background Pattern overlay */
body::before {
  content: "";
  position: fixed;
  top: 0; left: 0; width: 100vw; height: 100vh;
  background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%239C92AC' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  z-index: -1;
  pointer-events: none;
}

/* Glass Panel Base */
.glass-panel {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  box-shadow: var(--glass-shadow);
  transition: transform 0.3s ease, box-shadow 0.3s ease, background 0.5s ease, border 0.5s ease;
}

/* Header & Nav */
header {
  text-align: center;
  padding: 0;
  margin-bottom: 2rem;
}

nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 5%;
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--nav-bg);
  backdrop-filter: blur(15px);
  -webkit-backdrop-filter: blur(15px);
  border-bottom: 1px solid var(--glass-border);
  transition: background 0.5s ease;
}

.logo {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text-color);
  display: flex;
  align-items: center;
  gap: 4px;
  letter-spacing: -0.5px;
}

.logo-box {
  background-color: var(--accent-color);
  color: #121212; /* Deep contrast against the yellow */
  padding: 0 8px;
  border-radius: 6px;
  display: inline-block;
  line-height: 1.2;
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 2rem;
  align-items: center;
}

.nav-links a {
  color: var(--text-color);
  text-decoration: none;
  font-weight: 500;
  font-size: 1rem;
  transition: color 0.3s ease;
}

.nav-links a:hover {
  color: var(--accent-color);
}

.theme-toggle {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-color);
  transition: color 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}
.theme-toggle:hover {
  color: var(--accent-color);
}

/* Hamburger button */
.menu-toggle, .close-menu {
  display: none;
  background: none;
  border: none;
  color: var(--text-color);
  cursor: pointer;
}
.menu-toggle { font-size: 1.8rem; }
.close-menu { font-size: 1.5rem; align-self: flex-end; margin-bottom: 1rem; }

/* Mobile view */
@media (max-width: 768px) {
  .nav-links {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 70px;
    right: 5%;
    width: 250px;
    padding: 1.5rem;
    gap: 1rem;
    background: var(--nav-bg);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    box-shadow: var(--glass-shadow);
  }
  .nav-links.active {
    display: flex;
  }
  .menu-toggle, .close-menu {
    display: block;
  }
}

/* Hero Section */
.hero {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 3rem;
  padding: 5rem 1rem 3rem 1rem;
  flex-wrap: wrap;
}

.hero-left img {
  width: 200px;
  height: 200px;
  object-fit: cover;
  border: 4px solid var(--accent-color);
  border-radius: 50%;
  box-shadow: 0 0 20px rgba(255, 204, 0, 0.3);
  transition: transform 0.3s ease;
}

.hero-left img:hover {
  transform: scale(1.05);
}

.hero-right {
  min-width: 320px;
  text-align: left;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.hero-right h2 {
  font-size: 2rem;
  color: var(--text-color);
  line-height: 1.4;
}

#typing {
  color: var(--accent-color);
  border-right: 3px solid var(--accent-color);
  white-space: nowrap;
  overflow: hidden;
  display: inline-block;
  padding-right: 5px;
}

/* Sections */
section {
  padding: 4rem 1rem;
  text-align: center;
  max-width: 1200px;
  margin: 0 auto;
}

section h2 {
  color: var(--accent-color);
  margin-bottom: 2rem;
  display: inline-block;
  position: relative;
}

section h2::after {
  content: '';
  position: absolute;
  width: 50%;
  height: 3px;
  background: var(--accent-color);
  bottom: -10px;
  left: 25%;
  border-radius: 2px;
  transition: width 0.3s ease, left 0.3s ease;
}
section h2:hover::after {
  width: 100%;
  left: 0;
}

.para-profile {
  max-width: 800px;
  margin: 0 auto;
  font-size: 1.1rem;
  color: var(--text-muted);
  padding: 2rem;
  text-align: justify;
}

/* Skills Section */
.skills-grid, .extra-skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
  padding: 0 1rem;
}

.skill-card {
  padding: 2rem 1rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

.skill-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--hover-shadow);
  border-color: rgba(255, 204, 0, 0.3);
}

.skill-card img {
  width: 60px;
  height: 60px;
  filter: drop-shadow(0 4px 6px rgba(0,0,0,0.2));
}

.skill-card p {
  color: var(--text-color);
  font-weight: 600;
}

/* Education Timeline */
.timeline {
  position: relative;
  margin: 2rem auto;
  padding: 2rem 0;
  max-width: 800px;
}

.timeline::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 2px;
  background: var(--glass-border);
  transform: translateX(-50%);
}

.timeline-item {
  position: relative;
  margin: 2rem 0;
  width: 50%;
  padding: 0 2rem;
}

.timeline-item:nth-child(odd) {
  left: 0;
  text-align: right;
}

.timeline-item:nth-child(even) {
  left: 50%;
  text-align: left;
}

.timeline-item::after {
  content: '';
  position: absolute;
  width: 16px;
  height: 16px;
  background: var(--accent-color);
  border-radius: 50%;
  top: 50%;
  transform: translateY(-50%);
  box-shadow: 0 0 10px var(--accent-color);
}

.timeline-item:nth-child(odd)::after { right: -8px; }
.timeline-item:nth-child(even)::after { left: -8px; }

.timeline-content {
  padding: 1.5rem;
}

.timeline-content:hover {
  transform: translateY(-8px);
  box-shadow: var(--hover-shadow);
  border-color: rgba(255, 204, 0, 0.3);
}

.timeline-content h3 {
  color: var(--accent-color);
  margin-bottom: 0.5rem;
}
.timeline-content p { color: var(--text-muted); }

@media (max-width: 768px) {
  .timeline::before { left: 20px; }
  .timeline-item { width: 100%; padding-left: 50px; padding-right: 0; left: 0 !important; text-align: left !important; }
  .timeline-item::after { left: 12px !important; }
}

/* Experience */
.internship-grid {
  display: flex;
  justify-content: center;
  padding: 0 1rem;
}

.internship-card {
  padding: 2.5rem;
  max-width: 700px;
  width: 100%;
}

.internship-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--hover-shadow);
}

.internship-header img {
  height: 120px;
  width: 120px;
  object-fit: cover;
  border: 3px solid var(--accent-color);
  border-radius: 50%;
  margin: 1rem 0;
  box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

.internship-header h3 { color: var(--accent-color); }
.role { color: var(--text-color); font-weight: 600; font-size: 1.1rem; display: block; margin-top: 0.5rem;}
.duration { color: var(--text-muted); font-size: 0.9rem; margin-bottom: 1rem;}

.internship-summary p { color: var(--text-muted); margin-bottom: 1.5rem; }

.expand-btn {
  background: transparent;
  color: var(--accent-color);
  border: 2px solid var(--accent-color);
  padding: 0.5rem 1.5rem;
  border-radius: 25px;
  cursor: pointer;
  font-weight: 600;
  transition: all 0.3s ease;
}

.expand-btn:hover {
  background: var(--accent-color);
  color: var(--bg-color);
  box-shadow: 0 0 15px rgba(255, 204, 0, 0.4);
}

.internship-details {
  display: none;
  margin-top: 2rem;
  text-align: left;
  border-top: 1px solid var(--glass-border);
  padding-top: 1.5rem;
}

.internship-details ul { 
  padding-left: 1rem; 
  list-style: none;
}

.internship-details li {
  margin: 0.8rem 0;
  position: relative;
  padding-left: 1.5rem;
  color: var(--text-muted);
}
.internship-details li::before {
  content: "•";
  position: absolute;
  left: 0;
  color: var(--accent-color);
  font-size: 1.2rem;
}

/* Projects */
.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  padding: 0 1rem;
}

.project-card {
  padding: 2rem;
  text-align: left;
}

.project-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--hover-shadow);
  border-color: rgba(255, 204, 0, 0.3);
}

.project-card h3 {
  color: var(--accent-color);
  margin-bottom: 1rem;
}

.project-card p {
  color: var(--text-muted);
}
.project-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 10px;
    margin-top: 10px;
}
#portfolio-link{
  text-decoration: none;
}
/*Certificates*/
#cert-img{
  width:100%;
  height:auto;
  display:block;
  border-radius:10px;
  object-fit:contain;
}
/*Badges*/

.achievement-card{
    width:350px;
}

#badge{
    width:200px;
    height: 200px;
    object-fit:contain;
    margin-bottom:20px;
}

.achievement-card h3{
    margin-bottom:10px;
}

.achievement-card p{
    color:#666;
    line-height:1.6;
}

.achievement-card a{
    display:inline-block;
    margin-top:15px;
    text-decoration:none;
    color:#FFA116;   /* LeetCode orange */
    font-weight:600;
}
/* Contact Section */
.social-links {
  margin-top: 2.5rem;
  display: flex;
  justify-content: center;
  gap: 2rem;
  flex-wrap: wrap;
}

.social-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.social-icon img {
  width: 30px;
  height: 30px;
  transition: filter 0.3s ease;
}

[data-theme="dark"] .social-icon img,
body:not([data-theme="light"]) .social-icon img {
  filter: brightness(0) invert(1);
}

[data-theme="light"] .social-icon img {
  filter: brightness(0);
}

.social-icon:hover {
  transform: translateY(-5px);
  box-shadow: var(--hover-shadow);
  border-color: rgba(255, 204, 0, 0.3);
}

[data-theme="dark"] .social-icon:hover img,
body:not([data-theme="light"]) .social-icon:hover img {
  filter: brightness(0) invert(70%) sepia(80%) saturate(2000%) hue-rotate(5deg) drop-shadow(0 0 5px rgba(255,204,0,0.5));
}
[data-theme="light"] .social-icon:hover img {
  filter: brightness(0) invert(60%) sepia(90%) saturate(1000%) hue-rotate(5deg);
}

/* Footer */
footer {
  text-align: center;
  padding: 2rem;
  margin-top: 4rem;
  border-top: 1px solid var(--glass-border);
  background: var(--nav-bg);
  backdrop-filter: blur(10px);
}

footer h6 {
  color: var(--text-muted);
  font-weight: 400;
  margin: 0.5rem 0;
}