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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: 'Inter', 'Segoe UI', -apple-system, BlinkMacSystemFont, sans-serif;
  background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
  color: #1f2937;
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-overflow-scrolling: touch;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Layout */
.container {
  width: 90%;
  max-width: 1200px;
  margin: auto;
  padding: 20px;
}

header .container {
  padding: 0 20px;
}

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

header {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(15px);
  padding: 20px 0;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  transition: all 0.3s ease;
  will-change: transform, padding, box-shadow;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
}

header.scrolled {
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(15px);
  padding: 15px 0;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.logo {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  cursor: pointer;
}

.logo img {
  height: 80px;
  width: auto;
  border-radius: 0;
  background: transparent;
  padding: 0;
}

.logo-section {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  margin-left: -40px;
}

.logo-link {
  text-decoration: none;
  cursor: pointer;
}

.logo-tagline {
  font-size: 13px;
  color: #666;
  font-weight: 500;
  margin-top: 4px;
  margin-left: 2px;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  opacity: 0.7;
}

.logo .year {
  font-size: 18px;
  font-weight: 400;
  color: #a0aec0;
  -webkit-text-fill-color: #a0aec0;
  background: none;
  margin-left: 5px;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  cursor: pointer;
  padding: 8px;
  background: none;
  border: none;
  z-index: 1001;
}

.nav-toggle span {
  width: 25px;
  height: 3px;
  background: #2d3748;
  margin: 3px 0;
  transition: 0.3s;
  border-radius: 2px;
  display: block;
}

nav ul {
  display: flex;
  list-style: none;
  gap: 12px;
}

nav a {
  color: #1a202c;
  text-decoration: none;
  font-size: 15px;
  font-weight: 600;
  padding: 12px 20px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid rgba(226, 232, 240, 0.8);
  transition: all 0.3s ease;
  position: relative;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

nav a:hover {
  color: #ffffff;
  background: linear-gradient(135deg, #667eea, #764ba2);
  border-color: #667eea;
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(102, 126, 234, 0.3);
}

nav a.active {
  color: #ffffff;
  background: linear-gradient(135deg, #667eea, #764ba2);
  border-color: #667eea;
  box-shadow: 0 4px 15px rgba(102, 126, 234, 0.25);
}

/* Fullscreen Hero Section */
.hero-full {
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
  text-align: center;
  padding: 0 20px;
  position: relative;
}

.hero-full::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 30% 20%, rgba(16, 185, 129, 0.1) 0%, transparent 50%),
              radial-gradient(circle at 80% 60%, rgba(5, 150, 105, 0.1) 0%, transparent 50%),
              radial-gradient(circle at 40% 80%, rgba(16, 185, 129, 0.08) 0%, transparent 50%);
}

.hero-content {
  position: relative;
  z-index: 1;
  background: rgba(255, 255, 255, 0.95);
  padding: 60px 40px;
  border-radius: 20px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.hero-content h2 {
  font-size: 4rem;
  margin-bottom: 25px;
  color: #1a202c;
  font-weight: 800;
  text-shadow: none;
  line-height: 1.1;
}

.tagline {
  font-size: 1.4rem;
  margin-bottom: 45px;
  color: #2d3748;
  font-weight: 600;
  max-width: 650px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.5;
}

.btn {
  padding: 16px 40px;
  background: linear-gradient(45deg, #6366f1, #4f46e5);
  color: #fff;
  border: none;
  border-radius: 50px;
  font-size: 1.1rem;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.3s ease;
  box-shadow: 0 8px 25px rgba(99, 102, 241, 0.3);
  position: relative;
  overflow: hidden;
}

.btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 15px 35px rgba(99, 102, 241, 0.4);
  background: linear-gradient(45deg, #4f46e5, #3730a3);
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.5s;
}

.btn:hover::before {
  left: 100%;
}

/* Content Sections */
main:not(.hero-full) {
  background: #fff;
  min-height: 80vh;
  border-radius: 20px 20px 0 0;
  margin-top: -20px;
  position: relative;
  z-index: 10;
  box-shadow: 0 -10px 40px rgba(0, 0, 0, 0.1);
}

.section-title {
  text-align: center;
  font-size: 3rem;
  margin: 60px 0 50px;
  color: #2d3748;
  font-weight: 800;
  position: relative;
}

.section-title .emoji {
  background: none;
  -webkit-text-fill-color: initial;
  color: initial;
  margin-right: 10px;
}

.section-title .text {
  background: linear-gradient(135deg, #667eea, #764ba2, #f093fb);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -15px;
  left: 50%;
  transform: translateX(-50%);
  width: 100px;
  height: 5px;
  background: linear-gradient(135deg, #6366f1, #4f46e5, #8b5cf6);
  border-radius: 3px;
  box-shadow: 0 2px 8px rgba(99, 102, 241, 0.3);
}

.portfolio-section, .about-intro, .about-goal, .about-points {
  margin-bottom: 50px;
  padding: 30px;
  background: #f8fafc;
  border-radius: 15px;
  border-left: 5px solid #6366f1;
  box-shadow: 0 5px 20px rgba(99, 102, 241, 0.1);
  transition: transform 0.3s ease;
}

.portfolio-section:hover {
  transform: translateY(-5px);
}

.portfolio-section h3, .about-points h3, .about-goal h3 {
  font-size: 1.8rem;
  color: #2d3748;
  margin-bottom: 20px;
  font-weight: 700;
  position: relative;
  padding-bottom: 10px;
}

.portfolio-section h3 .emoji, .about-points h3 .emoji, .about-goal h3 .emoji {
  color: initial;
  margin-right: 8px;
}

.portfolio-section h3 .text, .about-points h3 .text, .about-goal h3 .text {
  background: linear-gradient(135deg, #667eea, #764ba2);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.portfolio-section h3::after, .about-points h3::after, .about-goal h3::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 40px;
  height: 3px;
  background: linear-gradient(135deg, #6366f1, #4f46e5);
  border-radius: 2px;
}

.portfolio-section p, .about-intro p, .about-goal p {
  margin-bottom: 15px;
  color: #4a5568;
  font-size: 1.05rem;
  line-height: 1.7;
}

.portfolio-section ul, .about-points ul {
  margin-left: 25px;
  color: #718096;
}

.portfolio-section ul li, .about-points li {
  margin-bottom: 12px;
  padding-left: 10px;
  position: relative;
}

.portfolio-section ul li::before, .about-points li::before {
  content: '✨';
  position: absolute;
  left: -20px;
}

.btn-wrap {
  text-align: center;
  margin: 50px 0;
}

/* Blog Posts */
.blog-post {
  background: #fff;
  padding: 35px;
  margin-bottom: 30px;
  border-radius: 15px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
  border: 1px solid #e2e8f0;
  transition: all 0.3s ease;
}

.blog-post:hover {
  transform: translateY(-5px);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.12);
}

.blog-post h3 {
  font-size: 1.7rem;
  margin-bottom: 15px;
  color: #2d3748;
  font-weight: 600;
}

.meta {
  font-size: 0.9rem;
  color: #a0aec0;
  margin-bottom: 15px;
  font-weight: 500;
}

.read-more {
  display: inline-flex;
  align-items: center;
  margin-top: 15px;
  color: #667eea;
  text-decoration: none;
  font-weight: 600;
  transition: all 0.3s ease;
}

.read-more:hover {
  color: #764ba2;
  transform: translateX(5px);
}

/* YouTube Page */
.youtube-page p {
  color: #4a5568;
  margin-bottom: 20px;
  font-size: 1.1rem;
  line-height: 1.6;
}

.yt-intro {
  margin-bottom: 50px;
  text-align: center;
  padding: 40px;
  background: #f8fafc;
  border-radius: 15px;
}

.yt-video {
  margin-bottom: 60px;
  text-align: center;
}

.yt-video h3 {
  font-size: 1.4rem;
  margin-bottom: 25px;
  color: #2d3748;
  font-weight: 600;
}

.yt-video iframe {
  border-radius: 15px;
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
}

/* Contact */
.contact-links ul {
  list-style: none;
  padding: 0;
  margin-bottom: 50px;
  text-align: center;
}

.contact-links li {
  margin-bottom: 20px;
  font-size: 1.1rem;
  padding: 15px;
  background: #f8fafc;
  border-radius: 10px;
  transition: all 0.3s ease;
}

.contact-links li:hover {
  background: #e2e8f0;
  transform: translateY(-2px);
}

.contact-links a {
  color: #667eea;
  text-decoration: none;
  font-weight: 600;
}

.contact-links a:hover {
  color: #764ba2;
}

/* Contact Form */
.contact-form {
  max-width: 600px;
  margin: auto;
  padding: 40px;
  background: #f8fafc;
  border-radius: 15px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
}

.contact-form h3 {
  text-align: center;
  margin-bottom: 30px;
  color: #2d3748;
  font-size: 1.5rem;
  font-weight: 600;
}

.contact-form form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.contact-form input,
.contact-form textarea {
  padding: 15px;
  font-size: 1rem;
  border: 2px solid #e2e8f0;
  border-radius: 10px;
  transition: all 0.3s ease;
  background: #fff;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: #667eea;
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.contact-form button {
  background: #cbd5e0;
  color: #718096;
  padding: 15px;
  border: none;
  border-radius: 10px;
  font-size: 1rem;
  cursor: not-allowed;
  opacity: 0.7;
  font-weight: 600;
}

/* Profile Header Styles */
#profileHeader {
  display: flex;
  align-items: center;
  gap: 15px;
  margin-left: auto;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  padding: 8px 16px;
  border-radius: 25px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  z-index: 1000;
  position: relative;
}

.profile-info {
  text-align: right;
  font-size: 0.9rem;
  color: #4f46e5;
  line-height: 1.2;
}

.profile-name {
  font-weight: 700;
  color: #2d3748;
  margin-bottom: 2px;
}

.profile-contact {
  font-size: 0.8rem;
  color: #718096;
}

.profile-logout-btn {
  background: linear-gradient(45deg, #ff6b6b, #ee5253);
  color: white;
  padding: 8px 15px;
  border: none;
  border-radius: 20px;
  cursor: pointer;
  font-weight: 600;
  font-size: 0.9rem;
  transition: all 0.3s ease;
  white-space: nowrap;
}

.profile-logout-btn:hover {
  background: linear-gradient(45deg, #ee5253, #c44569);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(238, 82, 83, 0.3);
}

/* Responsive Profile Header */
@media (max-width: 768px) {
  #profileHeader {
    position: fixed;
    top: 80px;
    right: 10px;
    left: 10px;
    margin: 0 auto;
    max-width: 300px;
    z-index: 1001;
  }

  .profile-info {
    font-size: 0.8rem;
  }

  .profile-logout-btn {
    padding: 6px 12px;
    font-size: 0.8rem;
  }
}

@media (max-width: 480px) {
  #profileHeader {
    flex-direction: column;
    gap: 10px;
    padding: 12px;
    text-align: center;
  }

  .profile-info {
    text-align: center;
  }

  .profile-logout-btn {
    width: 100%;
  }
}

/* Footer */
footer {
  background: #1a202c;
  color: #e2e8f0;
  text-align: center;
  padding: 30px 0;
  font-size: 15px;
  font-weight: 500;
}

/* Responsive */
@media (max-width: 768px) {
  header {
    padding: 15px 0;
  }

  .nav-flex {
    flex-direction: column;
    align-items: center;
    gap: 20px;
  }

  .logo img {
    height: 80px;
  }

  nav ul {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    width: 100%;
  }

  nav a {
    font-size: 14px;
    padding: 10px 16px;
  }

  .hero {
    flex-direction: column;
    text-align: center;
    padding: 40px 20px;
  }

  .hero-text h2 {
    font-size: 2.5rem;
    margin-bottom: 15px;
  }

  .hero-text p {
    font-size: 1.1rem;
  }

  .hero-image img {
    width: 220px;
    height: 220px;
    margin-top: 20px;
  }

  .section-title {
    font-size: 2.2rem;
    margin: 40px 0 30px;
  }

  .experience, .projects {
    padding: 40px 20px;
  }

  .columns {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .contact-tools {
    grid-template-columns: 1fr;
    padding: 40px 20px;
    gap: 30px;
  }

  .contact-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
  }

  .certificates-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
  }

  .project-list {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .hero-content {
    padding: 30px 20px;
    margin: 0 10px;
  }

  .hero-content h2 {
    font-size: 2.5rem;
    line-height: 1.2;
  }

  .tagline {
    font-size: 1.1rem;
    line-height: 1.4;
  }

  .portfolio-section, .about-intro, .about-goal, .about-points {
    padding: 25px 20px;
    margin-bottom: 30px;
  }

  .blog-post {
    padding: 25px 20px;
  }

  .contact-form {
    padding: 25px 20px;
  }

  .yt-video iframe {
    height: 250px;
  }

  .video-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .youtube-container {
    padding: 1rem;
  }

  .channel-header {
    padding: 2rem 1rem;
  }

  .channel-name {
    font-size: 2rem;
  }

  .action-buttons {
    flex-direction: column;
    gap: 15px;
  }

  .youtube-btn, .notes-btn {
    width: 100%;
    max-width: 280px;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 15px;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-flex {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }

  nav {
    position: fixed;
    top: 80px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 80px);
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    transition: left 0.3s ease;
    z-index: 999;
  }

  nav.active {
    left: 0;
  }

  nav ul {
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    gap: 20px;
    padding-top: 40px;
    height: 100%;
    list-style: none;
    margin: 0;
    padding-left: 0;
  }

  nav a {
    font-size: 16px;
    padding: 12px 20px;
    text-align: center;
  }

  /* Index page specific mobile fixes */
  .hero {
    flex-direction: column;
    padding: 30px 15px 20px;
    text-align: center;
    gap: 20px;
  }

  .hero-text {
    max-width: 100%;
    order: 2;
  }

  .hero-text h2 {
    font-size: 1.6rem;
    line-height: 1.3;
    margin-bottom: 12px;
  }

  .hero-text p {
    font-size: 0.9rem;
    line-height: 1.4;
    margin-bottom: 15px;
  }

  .hero-image {
    order: 1;
    margin-bottom: 15px;
  }

  .hero-image img {
    width: 180px;
    height: 180px;
  }

  .experience {
    padding: 30px 15px;
  }

  .experience h3 {
    font-size: 1.6rem;
    margin-bottom: 25px;
  }

  .columns {
    grid-template-columns: 1fr;
    gap: 15px;
  }

  .columns div {
    padding: 18px 15px;
  }

  .contact-tools {
    grid-template-columns: 1fr;
    padding: 30px 15px;
    gap: 25px;
  }

  .contact, .certificates {
    padding: 20px 15px;
  }

  .contact h4, .certificates h4 {
    font-size: 1.3rem;
    margin-bottom: 18px;
  }

  .contact-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .contact-item {
    padding: 18px 15px;
    text-align: center;
    flex-direction: row;
    justify-content: flex-start;
    align-items: center;
    gap: 15px;
  }

  .contact-icon {
    font-size: 24px;
    margin-bottom: 0;
    flex-shrink: 0;
  }

  .contact-info {
    text-align: left;
    flex: 1;
  }

  .contact-info h5 {
    font-size: 14px;
    margin-bottom: 3px;
  }

  .contact-info p {
    font-size: 12px;
  }

  .certificates-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .certificate-card {
    width: 100%;
    padding: 18px 15px;
    margin: 0;
  }

  .certificate-icon {
    font-size: 24px;
    margin-bottom: 8px;
  }

  .certificate-card h3 {
    font-size: 0.9rem;
    margin-bottom: 6px;
    line-height: 1.3;
  }

  .certificate-card p {
    font-size: 0.7rem;
    margin-bottom: 10px;
    line-height: 1.3;
  }

  .view-button {
    font-size: 0.7rem;
    padding: 6px 12px;
  }

  .projects {
    padding: 30px 15px;
  }

  .projects h3 {
    font-size: 1.6rem;
    margin-bottom: 25px;
  }

  .project-list {
    grid-template-columns: 1fr;
    gap: 15px;
  }

  .project {
    padding: 20px 15px;
  }

  .project span {
    font-size: 35px;
    margin-bottom: 12px;
  }

  .project h5 {
    font-size: 0.95rem;
    margin-bottom: 8px;
  }

  .project p {
    font-size: 0.85rem;
    line-height: 1.4;
  }

  .hero-content {
    padding: 25px 15px;
    margin: 0;
  }

  .hero-content h2 {
    font-size: 2rem;
    line-height: 1.3;
  }

  .tagline {
    font-size: 1rem;
    line-height: 1.4;
  }

  .btn {
    padding: 14px 28px;
    font-size: 1rem;
  }

  .section-title {
    font-size: 1.8rem;
    margin: 30px 0 25px;
  }

  .portfolio-section, .about-intro, .about-goal, .about-points {
    padding: 20px 15px;
  }

  .portfolio-section h3, .about-points h3, .about-goal h3 {
    font-size: 1.5rem;
  }

  .blog-post {
    padding: 20px 15px;
  }

  .contact-form {
    padding: 20px 15px;
  }

  .youtube-container {
    padding: 0.5rem;
  }

  .channel-header {
    padding: 1.5rem 1rem;
  }

  .channel-name {
    font-size: 1.8rem;
  }

  .channel-header img {
    width: 100px;
    height: 100px;
  }

  .video-grid {
    grid-template-columns: 1fr;
    gap: 15px;
  }

  .video-item iframe {
    height: 200px;
  }
}

/* === HOMEPAGE CUSTOM STYLES === */

.hero {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  padding: 80px 40px;
  background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
  border-bottom: none;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 20% 30%, rgba(16, 185, 129, 0.1) 0%, transparent 50%),
              radial-gradient(circle at 80% 70%, rgba(5, 150, 105, 0.1) 0%, transparent 50%);
  z-index: 1;
}

.hero-text {
  max-width: 600px;
  position: relative;
  z-index: 2;
}

.hero-text h2 {
  font-size: 48px;
  margin-bottom: 20px;
  color: #1a202c;
  font-weight: 800;
  line-height: 1.2;
  text-shadow: 2px 2px 4px rgba(0,0,0,0.1);
}

.hero-text p {
  font-size: 20px;
  line-height: 1.6;
  color: #2d3748;
  font-weight: 600;
  margin-bottom: 30px;
  text-shadow: 1px 1px 2px rgba(0,0,0,0.1);
}

.hero-image {
  position: relative;
  z-index: 2;
}

.hero-image img {
  width: 320px;
  height: 320px;
  object-fit: cover;
  border-radius: 50%;
  border: 6px solid #fff;
  box-shadow: 0 20px 40px rgba(0,0,0,0.15);
  transition: transform 0.3s ease;
}

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

.experience {
  padding: 80px 40px;
  background: #fff;
  position: relative;
}

.experience h3 {
  font-size: 36px;
  margin-bottom: 50px;
  text-align: center;
  color: #2d3748;
  font-weight: 700;
  position: relative;
}

.experience h3::after {
  content: '';
  position: absolute;
  bottom: -15px;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background: linear-gradient(45deg, #667eea, #764ba2);
  border-radius: 2px;
}

.columns {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 40px;
}

.columns div {
  background: #f8fafc;
  padding: 30px;
  border-radius: 15px;
  box-shadow: 0 10px 30px rgba(99, 102, 241, 0.1);
  border-left: 4px solid #6366f1;
  transition: transform 0.3s ease;
}

.columns div:hover {
  transform: translateY(-5px);
}

.columns h4 {
  margin-bottom: 20px;
  font-weight: 600;
  font-size: 20px;
  color: #2d3748;
}

.columns ul {
  list-style: none;
  padding-left: 0;
}

.columns ul li {
  margin-bottom: 12px;
  padding-left: 25px;
  position: relative;
  color: #4a5568;
  font-weight: 500;
}


.contact-tools {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: 50px;
  padding: 80px 40px;
  background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
}

.contact, .certificates {
  background: #fff;
  padding: 40px;
  border-radius: 20px;
  box-shadow: 0 15px 40px rgba(0,0,0,0.1);
  text-align: left;
  transition: transform 0.3s ease;
}

.contact:hover, .certificates:hover {
  transform: translateY(-5px);
}

.contact h4, .certificates h4 {
  font-size: 28px;
  margin-bottom: 30px;
  color: #667eea;
  font-weight: 700;
  text-align: center;
}

/* Contact Grid */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 20px;
}

.contact-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 16px 12px;
  border-radius: 10px;
  text-decoration: none;
  transition: all 0.2s ease;
  border: 1px solid rgba(226, 232, 240, 0.8);
  background: #fff;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.contact-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 25px rgba(0,0,0,0.1);
}

.contact-item.linkedin {
  border-color: #0077b5;
}

.contact-item.linkedin:hover {
  background: linear-gradient(135deg, #0077b5, #005885);
  color: white;
}

.contact-item.instagram {
  border-color: #e4405f;
}

.contact-item.instagram:hover {
  background: linear-gradient(135deg, #e4405f, #c13584);
  color: white;
}

.contact-item.telegram {
  border-color: #0088cc;
}

.contact-item.telegram:hover {
  background: linear-gradient(135deg, #0088cc, #006699);
  color: white;
}

.contact-item.youtube {
  border-color: #ff0000;
}

.contact-item.youtube:hover {
  background: linear-gradient(135deg, #ff0000, #cc0000);
  color: white;
}

.contact-icon {
  font-size: 24px;
  margin-bottom: 8px;
  transition: transform 0.2s ease;
}

.contact-item:hover .contact-icon {
  transform: scale(1.1);
}

.contact-info h5 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 5px;
  color: inherit;
}

.contact-info p {
  font-size: 12px;
  opacity: 0.8;
  margin: 0;
  color: inherit;
}

/* Certificates Grid */
.certificates-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
}

.certificate-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 25px 20px;
  background: #f8fafc;
  border-radius: 15px;
  transition: all 0.3s ease;
  border: 2px solid transparent;
  text-align: center;
}

.certificate-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 25px rgba(0,0,0,0.1);
}

.certificate-item.emotional-intelligence {
  border-color: #667eea;
}

.certificate-item.emotional-intelligence:hover {
  background: linear-gradient(135deg, #667eea, #764ba2);
  color: white;
}

.certificate-icon {
  font-size: 32px;
  margin-bottom: 12px;
  transition: transform 0.3s ease;
}

.certificate-item:hover .certificate-icon {
  transform: scale(1.1);
}

.certificate-item h5 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
  color: inherit;
}

.certificate-item p {
  font-size: 12px;
  opacity: 0.8;
  margin: 0 0 12px 0;
  color: inherit;
}

.view-certificate-btn {
  background: linear-gradient(45deg, #667eea, #764ba2);
  color: white;
  padding: 8px 16px;
  border: none;
  border-radius: 6px;
  text-decoration: none;
  font-size: 12px;
  font-weight: 500;
  transition: all 0.2s ease;
  margin-top: auto;
}

.view-certificate-btn:hover {
  background: linear-gradient(45deg, #764ba2, #667eea);
  transform: translateY(-1px);
  box-shadow: 0 4px 8px rgba(102, 126, 234, 0.3);
}

.projects {
  padding: 80px 40px;
  background: #fff;
}

.projects h3 {
  font-size: 36px;
  margin-bottom: 50px;
  text-align: center;
  color: #2d3748;
  font-weight: 700;
  position: relative;
}

.projects h3::after {
  content: '';
  position: absolute;
  bottom: -15px;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background: linear-gradient(45deg, #667eea, #764ba2);
  border-radius: 2px;
}

.project-list {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
  overflow-x: auto;
}

.project {
  background: #f8fafc;
  padding: 40px 30px;
  border-radius: 20px;
  box-shadow: 0 10px 30px rgba(99, 102, 241, 0.1);
  text-align: center;
  transition: all 0.3s ease;
  border: 1px solid #e2e8f0;
}

.project:hover {
  transform: translateY(-10px);
  box-shadow: 0 20px 40px rgba(0,0,0,0.12);
}

.project span {
  font-size: 60px;
  font-weight: 800;
  display: block;
  margin-bottom: 20px;
  background: linear-gradient(45deg, #6366f1, #4f46e5);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.project h5 {
  font-size: 20px;
  margin-bottom: 15px;
  color: #2d3748;
  font-weight: 600;
}

.project p {
  color: #4a5568;
  line-height: 1.6;
  font-weight: 500;
}

nav ul {
  display: flex;
  list-style: none;
  gap: 20px; /* Increased gap for better spacing */
}


.read-more-btn {
  color: white;
  background-color: #000080;
  padding: 0.5rem 1rem;
  border-radius: 6px;
  text-decoration: none;
  font-weight: bold;
}
.read-more-btn:hover {
  background-color: #0000cc;
}

.blog-card {
  background: #fff;
  border-radius: 12px;
  padding: 1.5rem 2rem;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.05);
  margin-bottom: 2rem;
  transition: all 0.2s ease;
}

.blog-card:hover {
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
}

.blog-card h2 {
  font-size: 1.8rem;
  color: #1a202c;
  margin-bottom: 0.5rem;
  font-weight: 700;
  line-height: 1.3;
}

.blog-card .meta {
  font-size: 0.9rem;
  color: #666;
  margin-bottom: 0.8rem;
}

.blog-card p {
  margin-bottom: 1.2rem;
  color: #444;
}

.read-more-btn {
  padding: 0.5rem 1.2rem;
  background: #000080;
  color: white;
  text-decoration: none;
  border-radius: 6px;
  font-weight: 500;
  transition: background 0.2s ease;
}

.read-more-btn:hover {
  background: #0000cc;
}

.certificates-section {
  padding: 30px 20px;
  background-color: #f8faff;
  text-align: center;
}

.certificates-section h2 {
  font-size: 1.8rem;
  margin-bottom: 20px;
  color: #1a1a1a;
}

.certificates-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 15px;
}

.certificate-card {
  background: #fff;
  border: 1px solid #e0e0e0;
  border-radius: 15px;
  padding: 15px 10px;
  width: 200px;
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.06);
  transition: transform 0.2s ease;
}

.certificate-card:hover {
  transform: scale(1.03);
}

.certificate-icon {
  font-size: 24px;
  margin-bottom: 5px;
}

.certificate-card h3 {
  font-size: 1rem;
  margin-bottom: 6px;
}

.certificate-card p {
  font-size: 0.8rem;
  color: #666666;
  margin-bottom: 10px;
}

.view-button {
  text-decoration: none;
  font-size: 0.8rem;
  padding: 6px 12px;
  border-radius: 20px;
  background: linear-gradient(90deg, #667eea, #764ba2);
  color: white;
  transition: background 0.3s ease;
}

.view-button:hover {
  background: linear-gradient(90deg, #5a67d8, #6b46c1);
}

.emoji-icon {
  width: 48px;
  height: 48px;
  margin-left: 10px;
  vertical-align: middle;
  object-fit: contain;
  display: inline-block;
  transform: translateY(-6px); /* adjusts vertical alignment */
}


li a {
  color: #1a202c; /* dark gray/black */
  text-decoration: none;
  font-weight: 600;
  font-size: 16px;
  transition: all 0.3s ease;
  padding: 8px 12px;
  border-radius: 8px;
  display: inline-block;
}

li a:hover {
  background-color: #f0f0f0; /* subtle hover effect */
  color: #2b6cb0; /* change text color on hover */
  text-decoration: underline;
}

.projects .project a {
  color: #1a202c; /* dark gray text */
  text-decoration: none;
  font-weight: 600;
  font-size: 16px;
  transition: all 0.3s ease;
  padding: 4px 2px;
  border-bottom: 2px solid transparent;
  cursor: pointer;
  display: inline-block;
}

.projects .project a:hover {
  color: #2b6cb0; /* blue on hover */
  border-bottom: 2px solid #2b6cb0;
}

/* Floating Button */
.doubts-btn {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background: #00aaff;
  color: white;
  font-size: 22px;
  width: 55px;
  height: 55px;
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
  cursor: pointer;
  z-index: 9999;
  opacity: 0;
  transform: scale(0.5) translateY(50px);
  text-decoration: none;
  animation: btnEnter 0.6s ease-out forwards;
  animation-delay: 0.3s;
}

/* Entrance animation */
@keyframes btnEnter {
  0% { opacity: 0; transform: scale(0.5) translateY(50px); }
  60% { opacity: 1; transform: scale(1.1) translateY(0); }
  100% { opacity: 1; transform: scale(1) translateY(0); }
}

/* Tooltip Bubble */
.doubts-bubble {
  position: fixed;
  bottom: 85px;
  right: 20px;
  background: #333;
  color: #fff;
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 14px;
  white-space: nowrap;
  opacity: 0;
  transform: translateY(10px);
  pointer-events: none;
  transition: opacity 0.4s ease, transform 0.4s ease;
  z-index: 9998;
}

/* Bubble visible */
.doubts-bubble.show {
  opacity: 1;
  transform: translateY(0);
}

/* Hover effect */
.doubts-btn:hover {
  background-color: #0088cc;
  transform: scale(1.15);
  transition: transform 0.2s ease;
}

/* Responsive */
@media (max-width: 600px) {
  .doubts-btn {
    width: 45px;
    height: 45px;
    font-size: 18px;
    bottom: 15px;
    right: 15px;
  }
  .doubts-bubble {
    bottom: 70px;
    right: 15px;
    font-size: 12px;
  }
}

/* YouTube Preview Section Styles */
.youtube-preview {
  max-width: 1200px;
  margin: 4rem auto;
  padding: 0 2rem;
}

.youtube-header {
  text-align: center;
  margin-bottom: 3rem;
  padding: 2rem;
  background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
  border-radius: 20px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.youtube-header h3 {
  font-size: 2.2rem;
  color: #2d3748;
  margin-bottom: 1rem;
  font-weight: 800;
}

.youtube-header p {
  font-size: 1.1rem;
  color: #4a5568;
  max-width: 700px;
  margin: 0 auto;
  line-height: 1.6;
}

.youtube-content {
  background: white;
  border-radius: 20px;
  padding: 2.5rem;
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
  margin-bottom: 3rem;
  border: 1px solid rgba(226, 232, 240, 0.5);
}

.channel-preview {
  display: flex;
  gap: 2rem;
  margin-bottom: 2rem;
  align-items: center;
}

.channel-info {
  display: flex;
  gap: 1.5rem;
  flex: 1;
  align-items: center;
}

.channel-thumb {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  object-fit: cover;
  border: 4px solid #fff;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.channel-details h4 {
  font-size: 1.5rem;
  color: #2d3748;
  margin-bottom: 0.5rem;
  font-weight: 700;
}

.channel-details p {
  color: #4a5568;
  margin-bottom: 0.8rem;
  line-height: 1.5;
}

.channel-description {
  font-size: 0.95rem;
  color: #718096;
}

.youtube-stats {
  display: flex;
  gap: 1rem;
  flex-direction: column;
  min-width: 150px;
}

.stat-item {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  padding: 0.8rem;
  background: #f8fafc;
  border-radius: 10px;
  transition: all 0.3s ease;
}

.stat-item:hover {
  background: #e2e8f0;
  transform: translateX(5px);
}

.stat-icon {
  font-size: 1.2rem;
}

.stat-text {
  font-weight: 600;
  color: #2d3748;
  font-size: 0.9rem;
}

.youtube-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  margin-top: 2rem;
}

.youtube-btn {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  padding: 1rem 2rem;
  border-radius: 15px;
  text-decoration: none;
  font-weight: 700;
  font-size: 1rem;
  transition: all 0.3s ease;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
  border: none;
  cursor: pointer;
}

.youtube-btn.primary {
  background: linear-gradient(45deg, #ff0000, #cc0000);
  color: white;
}

.youtube-btn.primary:hover {
  background: linear-gradient(45deg, #cc0000, #990000);
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(255, 0, 0, 0.3);
}

.youtube-btn.secondary {
  background: linear-gradient(45deg, #00897b, #00695c);
  color: white;
}

.youtube-btn.secondary:hover {
  background: linear-gradient(45deg, #00695c, #004d40);
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(0, 137, 123, 0.3);
}

.btn-icon {
  font-size: 1.1rem;
}

.featured-content {
  background: linear-gradient(135deg, #f0f9ff, #e0f2fe);
  border-radius: 20px;
  padding: 2.5rem;
  border-left: 4px solid #0ea5e9;
  box-shadow: 0 10px 30px rgba(14, 165, 233, 0.1);
}

.featured-content h4 {
  font-size: 1.6rem;
  color: #0369a1;
  margin-bottom: 2rem;
  text-align: center;
  font-weight: 700;
}

.content-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
}

.content-card {
  background: white;
  border-radius: 15px;
  padding: 2rem;
  text-align: center;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
  transition: all 0.3s ease;
  cursor: pointer;
  border: 2px solid transparent;
}

.content-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
  border-color: #6366f1;
}

.content-icon {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.content-card h5 {
  font-size: 1.2rem;
  color: #2d3748;
  margin-bottom: 0.8rem;
  font-weight: 700;
}

.content-card p {
  color: #4a5568;
  font-size: 0.95rem;
  line-height: 1.5;
}

/* Mobile Responsive for YouTube Section */
@media (max-width: 768px) {
  .youtube-preview {
    margin: 2rem auto;
    padding: 0 1rem;
  }

  .youtube-header {
    padding: 1.5rem;
    margin-bottom: 2rem;
  }

  .youtube-header h3 {
    font-size: 1.8rem;
  }

  .youtube-content {
    padding: 1.5rem;
    margin-bottom: 2rem;
  }

  .channel-preview {
    flex-direction: column;
    text-align: center;
    gap: 1.5rem;
  }

  .channel-info {
    flex-direction: column;
    text-align: center;
  }

  .channel-thumb {
    width: 80px;
    height: 80px;
  }

  .youtube-stats {
    flex-direction: row;
    justify-content: center;
    flex-wrap: wrap;
    min-width: auto;
  }

  .youtube-actions {
    flex-direction: column;
    align-items: center;
  }

  .youtube-btn {
    width: 100%;
    max-width: 300px;
    justify-content: center;
  }

  .featured-content {
    padding: 1.5rem;
  }

  .content-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

  .content-card {
    padding: 1.5rem;
  }
}