/* --- CSS VARIABLES --- */
:root {
  /* Aqua-themed light mode */
  --bg-color-light: #f0f8ff;
  --surface-color-light: #ffffff;
  --glass-bg-light: rgba(255, 255, 255, 0.5); /* Glass Background */
  --glass-border-light: rgba(255, 255, 255, 0.7);
  --text-color-light: #333333;
  --heading-color-light: #1a1a1a;
  --accent-color-light: #00bcd4;
  --accent-gradient-light: linear-gradient(135deg, #00bcd4, #00e5ff);
  --soft-gradient-bg-light: linear-gradient(135deg, #e0f7fa 0%, #bbdefb 100%);
  --border-color-light: #e0e0e0;
  --shadow-light: rgba(0, 0, 0, 0.08);

  /* Dark mode */
  --bg-color-dark: #1f2833;
  --surface-color-dark: #2c3a47;
  --glass-bg-dark: rgba(44, 58, 71, 0.4); /* Glass Background */
  --glass-border-dark: rgba(192, 217, 233, 0.2);
  --text-color-dark: #c0d9e9;
  --heading-color-dark: #ffffff;
  --accent-color-dark: #66fcf1;
  --accent-gradient-dark: linear-gradient(135deg, #66fcf1, #45a29e);
  --soft-gradient-bg-dark: linear-gradient(135deg, #1a222c 0%, #2b3945 100%);
  --border-color-dark: #4a5d6e;
  --shadow-dark: rgba(0, 0, 0, 0.4);

  /* Shared properties */
  --font-heading: "Poppins", sans-serif;
  --font-body: "Poppins", sans-serif;
  --border-radius-sm: 8px;
  --border-radius-md: 15px;
  --border-radius-lg: 25px;
}

/* --- NEW: PARTICLES CANVAS --- */
#particles-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -2; /* Behind everything */
  pointer-events: none;
}

/* --- MOUSE FOLLOWER DECOR --- */
.mouse-follower {
  position: fixed;
  width: 30px;
  height: 30px;
  border: 2px solid var(--accent-color-light);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  pointer-events: none;
  z-index: 9999;
  transition: width 0.3s ease, height 0.3s ease, background-color 0.3s ease;
}
body.dark-mode .mouse-follower {
  border-color: var(--accent-color-dark);
}
.mouse-follower.active {
  width: 50px;
  height: 50px;
  background-color: rgba(0, 188, 212, 0.2);
}
body.dark-mode .mouse-follower.active {
  background-color: rgba(102, 252, 241, 0.2);
}

/* --- THEME APPLICATION --- */
body {
  font-family: var(--font-body);
  background-color: var(--bg-color-light); /* This acts as a fallback */
  color: var(--text-color-light);
  transition: background-color 0.4s ease, color 0.4s ease;
  padding-top: 80px;
}
body.dark-mode {
  background-color: var(--bg-color-dark);
  color: var(--text-color-dark);
}

/* --- GENERAL RESET & UTILITIES --- */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
a {
  text-decoration: none;
  color: inherit;
}

section {
  padding: 40px 5%; /* MODIFIED: Reduced vertical padding */
  min-height: auto; /* MODIFIED: Removed min-height for tighter spacing */
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  background-color: transparent;
}
#home {
  min-height: 90vh; /* Keep hero section larger */
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-heading);
  color: var(--heading-color-light);
  transition: color 0.4s ease;
}
body.dark-mode h1,
body.dark-mode h2,
body.dark-mode h3,
body.dark-mode h4 {
  color: var(--heading-color-dark);
}
h2 {
  font-size: 2.5rem;
  text-align: center;
  margin-bottom: 30px; /* MODIFIED: Reduced margin */
}

/* Buttons */
.btn {
  padding: 12px 25px;
  border-radius: var(--border-radius-lg);
  font-weight: 600;
  font-size: 1rem;
  transition: all 0.3s ease;
  border: none;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.primary-btn {
  background: var(--accent-gradient-light);
  color: white;
  box-shadow: 0 5px 15px rgba(0, 188, 212, 0.3);
}
.primary-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 20px rgba(0, 188, 212, 0.4);
}
.secondary-btn {
  background-color: var(--surface-color-light);
  color: var(--text-color-light);
  border: 1px solid var(--border-color-light);
}
body.dark-mode .secondary-btn {
  background-color: var(--surface-color-dark);
  color: var(--text-color-dark);
  border: 1px solid var(--border-color-dark);
}
.secondary-btn:hover {
  background-color: var(--accent-color-light);
  color: white;
}
body.dark-mode .secondary-btn:hover {
  background-color: var(--accent-color-dark);
  color: var(--bg-color-dark);
}

/* --- HEADER --- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 80px;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 5%;
  transition: background-color 0.4s ease, box-shadow 0.4s ease;

  /* GLASS EFFECT FOR HEADER */
  background-color: var(--glass-bg-light);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px); /* For Safari */
  border-bottom: 1px solid var(--glass-border-light);
  box-shadow: 0 2px 10px var(--shadow-light);
}
body.dark-mode .header {
  background-color: var(--glass-bg-dark);
  border-bottom: 1px solid var(--glass-border-dark);
  box-shadow: 0 2px 10px var(--shadow-dark);
}

.navbar {
  display: flex;
  justify-content: space-between;
  width: 100%;
  align-items: center;
}
.nav-links {
  display: flex;
  gap: 30px;
}
.nav-item {
  padding: 8px 15px;
  border-radius: var(--border-radius-lg);
  font-weight: 500;
  color: var(--text-color-light);
  transition: all 0.3s ease;
}
body.dark-mode .nav-item {
  color: var(--text-color-dark);
}
/* MODIFIED: Separated active and hover styles */
.nav-item.active,
.nav-item:hover {
  background: var(--accent-gradient-light);
  color: white;
}
.nav-item:not(.active):hover {
  transform: translateY(-3px);
}
body.dark-mode .nav-item.active,
body.dark-mode .nav-item:hover {
  background: var(--accent-gradient-dark);
  color: var(--bg-color-dark);
}

.logo {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--heading-color-light);
}
body.dark-mode .logo {
  color: var(--heading-color-dark);
}
.theme-toggle-btn {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-color-light);
  transition: color 0.3s ease;
}
body.dark-mode .theme-toggle-btn {
  color: var(--text-color-dark);
}
.theme-toggle-btn:hover {
  color: var(--accent-color-light);
}
body.dark-mode .theme-toggle-btn:hover {
  color: var(--accent-color-dark);
}

/* --- HERO SECTION --- */
#home {
  position: relative;
  overflow: hidden;
  padding: 100px 5%;
}
.hero-bg-gradient {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--soft-gradient-bg-light);
  transition: background 0.4s ease;
  z-index: -1;
  opacity: 0.3;
}
body.dark-mode .hero-bg-gradient {
  background: var(--soft-gradient-bg-dark);
}

.hero-content {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 50px;
  max-width: 1200px;
  margin: auto;
}
.hero-text {
  flex: 1;
  min-width: 300px;
  text-align: left;
}
#home h1 {
  font-size: 3.5rem;
  line-height: 1.2;
  margin-bottom: 20px;
}
.highlight-name {
  background: var(--accent-gradient-light);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight: 700;
}
body.dark-mode .highlight-name {
  background: var(--accent-gradient-dark);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.quote-box {
  border-left: 5px solid var(--accent-color-light);
  padding: 20px;
  border-radius: var(--border-radius-md);
  margin-bottom: 30px;
  max-width: 400px;
  box-shadow: 0 4px 10px var(--shadow-light);
  transition: background-color 0.4s ease, border-color 0.4s ease,
    box-shadow 0.4s ease;
  background-color: var(--glass-bg-light);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border: 1px solid var(--glass-border-light);
}
body.dark-mode .quote-box {
  background-color: var(--glass-bg-dark);
  border-color: var(--accent-color-dark);
  border-left: 5px solid var(--accent-color-dark);
  box-shadow: 0 4px 10px var(--shadow-dark);
}
.quote-box i {
  color: var(--accent-color-light);
  font-size: 1.5rem;
  margin-right: 10px;
}
body.dark-mode .quote-box i {
  color: var(--accent-color-dark);
}
.quote-box p {
  display: inline;
  font-style: italic;
  line-height: 1.6;
}
.hero-cta-buttons {
  display: flex;
  gap: 20px;
}
.hero-image-container {
  position: relative;
  flex: 1;
  min-width: 300px;
  display: flex;
  justify-content: center;
  align-items: center;
}
.hero-profile-image {
  width: 350px;
  height: 400px;
  object-fit: cover;
  border-radius: 20%;
  box-shadow: 0 10px 30px var(--shadow-light);
  transition: box-shadow 0.4s ease;
}
body.dark-mode .hero-profile-image {
  box-shadow: 0 10px 30px var(--shadow-dark);
}

/* --- CARD & ITEM STYLES with GLASS EFFECT --- */
.service-card,
.skill-item,
.project-item,
.education-card,
.internship-item {
  box-shadow: 0 5px 15px var(--shadow-light);
  transition: all 0.3s ease;
  background-color: var(--glass-bg-light);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid var(--glass-border-light);
  border-radius: var(--border-radius-md);
}
body.dark-mode .service-card,
body.dark-mode .skill-item,
body.dark-mode .project-item,
body.dark-mode .education-card,
body.dark-mode .internship-item {
  background-color: var(--glass-bg-dark);
  border: 1px solid var(--glass-border-dark);
  box-shadow: 0 5px 15px var(--shadow-dark);
}
/* --- NEW: GENTLE & CONTINUOUS SHAKE ANIMATION --- */

/* 1. Define the keyframes for the smooth floating effect */
@keyframes gentle-shake {
  0% {
    transform: translate(0, 0) rotate(0deg);
  }
  25% {
    transform: translate(2px, -2px) rotate(-1deg);
  }
  50% {
    transform: translate(0, 0) rotate(0deg);
  }
  75% {
    transform: translate(-2px, 2px) rotate(1deg);
  }
  100% {
    transform: translate(0, 0) rotate(0deg);
  }
}

/* 2. Apply the animation directly to the profile images */
.hero-profile-image,
.about-profile-image {
  animation: gentle-shake 2s ease-in-out infinite;
}
.service-card:hover,
.skill-item:hover,
.project-item:hover,
.education-card:hover,
.internship-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 20px var(--shadow-light);
}
body.dark-mode .service-card:hover,
body.dark-mode .skill-item:hover,
body.dark-mode .project-item:hover,
body.dark-mode .education-card:hover,
body.dark-mode .internship-item:hover {
  box-shadow: 0 8px 20px var(--shadow-dark);
}

.service-cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  width: 100%;
  max-width: 1200px;
}
.service-card {
  padding: 30px;
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 380px;
}
.service-card::before {
  display: none;
}
.service-card h3 {
  font-size: 1.5rem;
  margin-bottom: 20px;
}
.service-sample-image {
  width: 100%;
  max-width: 250px;
  height: auto;
  object-fit: contain;
  margin: 20px auto;
  display: block;
  border-radius: var(--border-radius-sm);
}
.service-link-btn {
  align-self: flex-end;
  background-color: var(--accent-color-light);
  color: white;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 1.2rem;
  box-shadow: 0 3px 10px rgba(0, 188, 212, 0.3);
  transition: all 0.3s ease;
}
body.dark-mode .service-link-btn {
  background-color: var(--accent-color-dark);
}
.service-link-btn:hover {
  transform: translateX(5px) scale(1.05);
  box-shadow: 0 5px 15px rgba(0, 188, 212, 0.4);
}

.about-content-wrapper {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 50px;
  max-width: 1200px;
  margin-top: 30px;
}
.about-image-side {
  flex: 1;
  min-width: 300px;
  max-width: 400px;
}
.about-profile-image {
  width: 100%;
  height: auto;
  border-radius: var(--border-radius-md);
  box-shadow: 0 10px 30px var(--shadow-light);
  transition: box-shadow 0.4s ease;
}
body.dark-mode .about-profile-image {
  box-shadow: 0 10px 30px var(--shadow-dark);
}
.about-text-side {
  flex: 2;
  min-width: 300px;
  text-align: left;
}
.about-text-side h3 {
  font-size: 2rem;
  margin-bottom: 20px;
}
.about-text-side p {
  line-height: 1.7;
  margin-bottom: 15px;
  max-width: 700px;
}

.skills-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 20px;
  max-width: 1000px;
}
.skill-item {
  padding: 20px 30px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 15px;
  width: 150px;
}
.skill-item i {
  font-size: 3rem;
  color: var(--accent-color-light);
}
body.dark-mode .skill-item i {
  color: var(--accent-color-dark);
}
.skill-item span {
  font-weight: 500;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 30px;
  width: 100%;
  max-width: 1200px;
}
.project-item {
  overflow: hidden;
}
.project-item img {
  width: 100%;
  height: 250px;
  object-fit: cover;
  display: block;
}
.project-info {
  padding: 20px;
}
.project-info h3 {
  font-size: 1.4rem;
  margin-bottom: 15px;
}
.project-links {
  display: flex;
  gap: 15px;
}
.project-links a {
  color: var(--text-color-light);
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 5px;
  transition: color 0.3s ease;
}
body.dark-mode .project-links a {
  color: var(--text-color-dark);
}
.project-links a:hover {
  color: var(--accent-color-light);
}
body.dark-mode .project-links a:hover {
  color: var(--accent-color-dark);
}

.contact-form {
  max-width: 800px;
  margin: 0 auto 50px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 15px 20px;
  outline: none;
  color: var(--text-color-light);
  border-radius: var(--border-radius-md);
  font-family: var(--font-body);
  font-size: 1rem;
  transition: all 0.3s ease;
  background-color: var(--glass-bg-light);
  backdrop-filter: blur(5px);
  -webkit-backdrop-filter: blur(5px);
  border: 1px solid var(--glass-border-light);
}
body.dark-mode .contact-form input,
body.dark-mode .contact-form textarea {
  background-color: var(--glass-bg-dark);
  border: 1px solid var(--glass-border-dark);
  color: var(--text-color-dark);
}
.contact-form input::placeholder,
.contact-form textarea::placeholder {
  color: var(--text-color-light);
  opacity: 0.7;
}
body.dark-mode .contact-form input::placeholder,
body.dark-mode .contact-form textarea::placeholder {
  color: var(--text-color-dark);
  opacity: 0.7;
}
.contact-form input:focus,
.contact-form textarea:focus {
  border: 1px solid var(--accent-color-light);
  box-shadow: 0 0 0 3px rgba(0, 188, 212, 0.2);
}
body.dark-mode .contact-form input:focus,
body.dark-mode .contact-form textarea:focus {
  border: 1px solid var(--accent-color-dark);
  box-shadow: 0 0 0 3px rgba(102, 252, 241, 0.2);
}

.social-links {
  margin-top: 30px;
  display: flex;
  justify-content: center;
  gap: 30px;
}
.social-links a {
  font-size: 2.5rem;
  color: var(--text-color-light);
  transition: color 0.3s ease;
}
body.dark-mode .social-links a {
  color: var(--text-color-dark);
}
.social-links a:hover {
  color: var(--accent-color-light);
}
body.dark-mode .social-links a:hover {
  color: var(--accent-color-dark);
}

.footer {
  padding: 30px 5%;
  text-align: center;
  color: #777;
  font-size: 0.9rem;
  transition: background-color 0.4s ease, color 0.4s ease;
  background-color: transparent;
}
body.dark-mode .footer {
  color: #a0a0a0;
}

/* --- EDUCATION SECTION --- */
.education-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 30px;
  width: 100%;
  max-width: 900px;
}
.education-card {
  padding: 30px;
  text-align: center;
}
.education-card h3 {
  font-size: 1.4rem;
  color: var(--accent-color-light);
  margin-bottom: 10px;
}
body.dark-mode .education-card h3 {
  color: var(--accent-color-dark);
}
.education-card .institution {
  font-size: 1.1rem;
  font-weight: 500;
  margin-bottom: 10px;
}
.education-card .details {
  font-size: 1rem;
  opacity: 0.9;
}

/* --- INTERNSHIP SECTION --- */
.internship-container {
  display: grid; /* MODIFIED */
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr)); /* MODIFIED */
  gap: 30px;
  width: 100%;
  max-width: 1200px; /* MODIFIED */
}
.internship-item {
  display: flex;
  flex-wrap: wrap;
  gap: 25px;
  padding: 30px;
  align-items: flex-start;
  text-align: left;
}
.internship-logo {
  flex-shrink: 0;
}
.internship-logo img {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--surface-color-light);
  padding: 10px;
  object-fit: contain;
  border: 1px solid var(--border-color-light);
}
body.dark-mode .internship-logo img {
  background: var(--surface-color-dark);
  border-color: var(--border-color-dark);
}
.internship-details {
  flex-grow: 1;
}
.internship-details h3 {
  font-size: 1.4rem;
  margin-bottom: 5px;
}
.internship-details .company {
  font-weight: 500;
  margin-bottom: 8px;
  font-size: 1.1rem;
}
.internship-details .duration {
  font-style: italic;
  opacity: 0.8;
  margin-bottom: 15px;
  display: block;
}
.internship-details ul {
  padding-left: 20px;
}
.internship-details ul li {
  margin-bottom: 8px;
  line-height: 1.6;
}

/* --- RESPONSIVE DESIGN --- */
@media (max-width: 992px) {
  .navbar {
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
  }
  .nav-links {
    gap: 15px;
  }
  .logo {
    order: -1;
    width: 100%;
    text-align: center;
    margin-bottom: 10px;
  }
  .hero-content {
    flex-direction: column;
    text-align: center;
    gap: 30px;
  }
  .hero-text {
    text-align: center;
  }
  .hero-cta-buttons {
    justify-content: center;
  }
  .hero-image-container {
    order: -1;
  }
  .hero-profile-image {
    width: 280px;
    height: 320px;
  }
  .about-content-wrapper {
    flex-direction: column;
    gap: 30px;
  }
  .about-text-side {
    text-align: center;
  }
  .about-text-side .btn {
    margin: 20px auto 0;
  }
}
@media (max-width: 768px) {
  h1 {
    font-size: 2.8rem;
  }
  h2 {
    font-size: 2rem;
    margin-bottom: 30px;
  }
  .nav-links.left,
  .nav-links.right {
    display: none;
  }
  .logo {
    width: auto;
    margin-bottom: 0;
  }
  .theme-toggle-btn {
    margin-left: auto;
  }
  .service-cards-grid,
  .projects-grid,
  .internship-container {
    grid-template-columns: 1fr;
  }
}
@media (max-width: 480px) {
  h1 {
    font-size: 2.2rem;
  }
  .hero-cta-buttons {
    flex-direction: column;
    gap: 15px;
  }
  .btn {
    width: 100%;
  }
  .hero-profile-image {
    width: 250px;
    height: 280px;
  }
  .quote-box {
    margin: 0 auto 20px;
  }
  .service-card h3 {
    font-size: 1.3rem;
  }
  .social-links {
    gap: 20px;
  }
  .social-links a {
    font-size: 2rem;
  }
  .internship-item {
    text-align: center;
    flex-direction: column;
    align-items: center;
  }
  .internship-details ul {
    text-align: left;
  }
}