/* =========================
   Variables
========================= */
:root {
  --light-bg: #f5efe6;
  --light-text: #222;
  --dark-bg: #1b1b1b;
  --dark-text: #f5f5f5;
  --accent: #da4b4b;
  --accent-hover: #b33a3a;
  --nav-bg-light: #ffb347;
  --nav-bg-dark: #171616;
  --card-bg-light: #fff3e0;
  --card-bg-dark: #2a2a2a;
  --bg-section-light: #f9f9f9;
  --bg-section-dark: #1f1f1f;
  --text-secondary-light: #555;
  --text-secondary-dark: #ccc;
  --shadow: 0 4px 12px rgba(0,0,0,0.15);
  --shadow-hover: 0 8px 20px rgba(0,0,0,0.15);
  --border-radius: 10px;
  --transition-speed: 0.3s;
}

/* =========================
   Base Styles
========================= */
body {
  margin: 0;
  font-family: 'Segoe UI', Tahoma, sans-serif;
  background: var(--light-bg);
  color: var(--light-text);
  transition: background var(--transition-speed) ease, color var(--transition-speed) ease;
}

body.dark-theme {
  background: var(--dark-bg);
  color: var(--dark-text);
}

h2 {
  font-size: 1.8rem;
  margin-bottom: 1rem;
  text-align: center;
}

/* =========================
   Navbar
========================= */
.navbar {
  background: var(--nav-bg-light);
  padding: 0.7rem 1rem;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: var(--shadow);
  transition: background var(--transition-speed);
}

body.dark-theme .navbar {
  background: var(--nav-bg-dark);
}

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

.logo {
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--light-text);
}

body.dark-theme .logo {
  color: var(--dark-text);
}

ul.nav-links {
  list-style: none;
  display: flex;
  gap: 0.8rem;
  flex-wrap: wrap;
  align-items: center;
  margin: 0;
  padding: 0;
}

ul.nav-links li a {
  text-decoration: none;
  padding: 0.45rem 0.8rem;
  border-radius: var(--border-radius);
  font-weight: 600;
  font-size: 0.95rem;
  transition: background var(--transition-speed), transform 0.2s;
  color: var(--light-text);
}

body.dark-theme ul.nav-links li a {
  color: var(--dark-text);
}

ul.nav-links li a:hover {
  background: rgba(0,0,0,0.08);
  transform: translateY(-2px);
}

body.dark-theme ul.nav-links li a:hover {
  background: rgba(255,255,255,0.08);
}

/* Theme Toggle Button */
#theme-toggle {
  background: transparent;
  border: none;
  font-size: 1.2rem;
  cursor: pointer;
  color: var(--light-text);
}
body.dark-theme #theme-toggle {
  color: var(--dark-text);
}

/* =========================
   About Section
========================= */
.about-section {
  padding: 2rem 1rem;
}

.about-container {
  display: flex;
  align-items: center;
  gap: 2rem;
  flex-wrap: wrap;
}

.about-img {
  flex: 0 0 220px;
}

.profile-img {
  width: 220px;
  height: 220px;
  border-radius: var(--border-radius);
  object-fit: cover;
  box-shadow: var(--shadow);
  border: 4px solid rgba(0,0,0,0.1);
}

body.dark-theme .profile-img {
  border-color: rgba(255,255,255,0.3);
}

.about-text {
  flex: 1;
}

.social-links {
  display: flex;
  gap: 0.8rem;
  flex-wrap: wrap;
  margin-top: 1rem;
}

.social-links a {
  text-decoration: none;
  font-size: 1rem;
  color: var(--light-text);
  background: var(--card-bg-light);
  padding: 0.4rem 0.6rem;
  border-radius: var(--border-radius);
  transition: transform 0.2s, background var(--transition-speed);
}

.social-links a:hover {
  transform: translateY(-2px);
  background: var(--accent);
  color: #fff;
}

body.dark-theme .social-links a {
  color: var(--dark-text);
  background: var(--card-bg-dark);
}

/* =========================
   Sections Common
========================= */
section {
  padding: 3rem 1rem;
  background: var(--bg-section-light);
  transition: background var(--transition-speed);
}

body.dark-theme section {
  background: var(--bg-section-dark);
}

/* =========================
   Tech Stack
========================= */
.tech-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.8rem;
}

.tech-grid span {
  background: var(--card-bg-light);
  padding: 0.5rem 1rem;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  font-weight: bold;
}

body.dark-theme .tech-grid span {
  background: var(--card-bg-dark);
}
/* =========================
   Internships (Card Layout)
========================= */
.internship-card {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  background: var(--card-bg-light);
  padding: 1rem;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  margin-bottom: 1rem;
  transition: transform var(--transition-speed);
}
body.dark-theme .internship-card {
  background: var(--card-bg-dark);
}
.internship-card:hover {
  transform: translateY(-5px);
}

.company-logo {
  width: 70px;
  height: 70px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--accent);
}

.internship-details h3 {
  margin: 0;
}
/* =========================
   Internships – Click Dropdown
========================= */

.internship-card {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  background: var(--card-bg-light);
  padding: 1rem;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  margin-bottom: 1rem;
  transition: transform var(--transition-speed);
}

body.dark-theme .internship-card {
  background: var(--card-bg-dark);
}

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

.company-logo {
  width: 70px;
  height: 70px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--accent);
}

.internship-details h3 {
  margin: 0;
}

/* Dropdown container */
.cert-dropdown {
  position: relative;
  margin-top: 0.5rem;
}

/* Dropdown button */
.cert-btn {
  padding: 0.45rem 0.9rem;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--border-radius);
  cursor: pointer;
  font-size: 0.9rem;
  transition: background 0.3s ease;
}
.cert-btn:hover {
  background: var(--accent-hover);
}

/* Hidden list */
.cert-list {
  max-height: 0;
  overflow: hidden;
  list-style: none;
  background: var(--card-bg-light);
  box-shadow: var(--shadow);
  border-radius: var(--border-radius);
  margin-top: 0.4rem;
  transition: max-height 0.3s ease;
}
body.dark-theme .cert-list {
  background: var(--card-bg-dark);
}

/* When JS adds .show => expand */
.cert-list.show {
  max-height: 180px; /* enough to show all items */
}

.cert-list li {
  padding: 0.35rem 1rem;
}

.cert-list li a {
  text-decoration: none;
  color: var(--light-text);
  font-size: 0.9rem;
}
body.dark-theme .cert-list li a {
  color: var(--dark-text);
}
.cert-list li a:hover {
  text-decoration: underline;
}


/* =========================
   Education
========================= */
/* =========================
   Education (same design as Internship)
========================= */
.education-card {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  background: var(--card-bg-light);
  padding: 1rem;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  margin-bottom: 1rem;
  transition: transform var(--transition-speed);
}

body.dark-theme .education-card {
  background: var(--card-bg-dark);
}

.education-card:hover {
  transform: translateY(-5px);
}

.education-card h3 {
  margin: 0;
}

/* reuse the same dropdown styles */
.education-card .cert-dropdown { margin-top: 0.5rem; }
.education-card .cert-btn      { padding: 0.45rem 0.9rem; }
.education-card .cert-list     { max-height: 0; overflow: hidden; }
.education-card .cert-list.show { max-height: 200px; }


/* =========================
   Projects
========================= */
/* =========================
   Projects
========================= */

#projects {
  padding: 40px;
}

.project-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  justify-content: center;
  margin-bottom: 30px;
}

.project-card {
  background: var(--card-bg-light);
  border-radius: var(--border-radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  width: 300px;
  transition: transform var(--transition-speed), box-shadow var(--transition-speed);
}

body.dark-theme .project-card {
  background: var(--card-bg-dark);
}

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

.project-card h3 {
  margin-top: 0;
  margin-bottom: 0.6rem;
}

.project-card p {
  font-size: 0.95rem;
  margin-bottom: 1rem;
}

/* Links container */
.project-links {
  display: flex;
  gap: 10px;
  justify-content: center;
}

/* Button style for project links */
.project-links .btn {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  padding: 0.6rem 1.2rem;
  text-align: center;
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: var(--border-radius);
  transition: background 0.3s ease;
}

.project-links .btn:hover {
  background: var(--accent-hover);
}

/* =========================
   Certifications
========================= */
.certifications-container {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px;
}

.cert-card {
  background: var(--card-bg-light);
  padding: 1.5rem;
  width: 280px;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  text-align: center;
  transition: transform var(--transition-speed), box-shadow var(--transition-speed);
}

body.dark-theme .cert-card {
  background: var(--card-bg-dark);
}

.cert-card h3 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

.cert-card p {
  font-size: 0.9rem;
  color: var(--text-secondary-light);
}

body.dark-theme .cert-card p {
  color: var(--text-secondary-dark);
}

.cert-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
}
/* =========================
   Certifications Buttons
========================= */
.cert-card .btn {
  background: var(--accent);
  color: white;
  text-decoration: none;
  padding: 0.6rem 1rem;
  border-radius: var(--border-radius);
  font-size: 0.85rem;
  font-weight: bold;
  transition: background var(--transition-speed);
}

.cert-card .btn:hover {
  background: var(--accent-hover);
}
/* =========================
   Publications Buttons (Updated)
========================= */
.card-buttons .btn {
  background: var(--accent); 
  color: white;
  text-decoration: none;
  padding: 0.6rem 1rem;
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: bold;
  transition: background 0.3s ease;
}

.card-buttons .btn:hover {
  background: var(--accent-hover);
}

/* Secondary button variant for certificates */
.card-buttons .btn.secondary {
  background: var(--accent); 
  color: white;
}

.card-buttons .btn.secondary:hover {
  background: var(--accent-hover);
}

/* =========================
   Publications
========================= */
.cards-container {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px;
}

.card {
  background: var(--card-bg-light);
  padding: 1.5rem;
  width: 280px;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  transition: transform var(--transition-speed), box-shadow var(--transition-speed);
  text-align: center;
}

body.dark-theme .card {
  background: var(--card-bg-dark);
}

.card h3 {
  margin-bottom: 0.5rem;
}

.card p {
  font-size: 0.95rem;
  color: var(--text-secondary-light);
}

body.dark-theme .card p {
  color: var(--text-secondary-dark);
}

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

.card-buttons {
  display: flex;
  gap: 10px;
  justify-content: center;
}

/* =========================
   Achievements
========================= */
.achievement-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px;
}

.achievement-card {
  background: var(--card-bg-light);
  padding: 1rem;
  width: 250px;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  text-align: center;
  transition: transform var(--transition-speed), box-shadow var(--transition-speed);
}

body.dark-theme .achievement-card {
  background: var(--card-bg-dark);
}

.achievement-card img {
  width: 100%;
  height: 160px;
  object-fit: cover;
  border-radius: var(--border-radius);
}

.achievement-card p {
  margin-top: 10px;
  font-size: 0.95rem;
  color: var(--text-secondary-light);
}

body.dark-theme .achievement-card p {
  color: var(--text-secondary-dark);
}

.achievement-card .btn {
  background: var(--accent); 
  color: white;
  text-decoration: none;
  padding: 0.6rem 1rem;
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: bold;
  transition: background 0.3s ease;
}

.achievement-card .btn:hover {
  background: var(--accent-hover);
}

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

/* =========================
   Blogs
========================= */
.blog-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px;
}

.blog-card {
  background: var(--card-bg-light);
  padding: 1rem;
  width: 250px;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  text-align: center;
  transition: transform var(--transition-speed), box-shadow var(--transition-speed);
}

body.dark-theme .blog-card {
  background: var(--card-bg-dark);
}

.blog-card h3 {
  font-size: 1.2rem;
  margin-bottom: 10px;
}

.blog-card p {
  margin-top: 10px;
  font-size: 0.95rem;
  color: var(--text-secondary-light);
}

body.dark-theme .blog-card p {
  color: var(--text-secondary-dark);
}

.blog-card .btn {
  background: var(--accent); 
  color: white;
  text-decoration: none;
  padding: 0.6rem 1rem;
  border-radius: 6px;
  font-size: 0.85rem;
  font-weight: bold;
  transition: background 0.3s ease;
}

.blog-card .btn:hover {
  background: var(--accent-hover);
}

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

/* =========================
   Modal
========================= */
.modal {
  display: none;
  position: fixed;
  z-index: 9999;
  left: 0; top: 0;
  width: 100%; height: 100%;
  background: rgba(0,0,0,0.7);
  justify-content: center;
  align-items: center;
}

.modal img {
  max-width: 90%;
  max-height: 80%;
}

.close-btn {
  position: absolute;
  top: 20px;
  right: 30px;
  font-size: 2rem;
  color: #fff;
  cursor: pointer;
}

.modal-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  margin-top: 1rem;
}

.modal-buttons a,
.modal-buttons button {
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  border: none;
  padding: 6px 10px;
  border-radius: var(--border-radius);
  cursor: pointer;
}

/* =========================
   Contact Form
========================= */
form {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  max-width: 500px;
  margin: auto;
}

input, textarea {
  padding: 0.6rem;
  border-radius: var(--border-radius);
  border: 1px solid #ccc;
}

button {
  background: var(--accent);
  color: white;
  border: none;
  padding: 0.6rem;
  border-radius: var(--border-radius);
  cursor: pointer;
  font-weight: bold;
}

button:hover {
  opacity: 0.9;
}

/* =========================
   Footer
========================= */
footer {
  text-align: center;
  padding: 1rem;
  background: var(--nav-bg-light);
}

body.dark-theme footer {
  background: var(--nav-bg-dark);
}

/* =========================
   Responsive
========================= */
@media (max-width: 860px) {
  ul.nav-links {
    display: none;
  }
  .about-container {
    flex-direction: column;
    align-items: center;
  }
  .project-grid, .achievement-grid, .cards-container, .certifications-container {
    justify-content: center;
  }
}