/* CSS Custom Properties */
:root {
  --color-bg: #f8f9fa;
  --color-text: #1a1a1a;
  --color-accent: #0066cc;
  --color-accent-hover: #0052a3;
  --color-secondary: #00a8cc;
  --color-border: #e0e0e0;
  --color-card-bg: #ffffff;
  --color-shadow: rgba(0, 0, 0, 0.08);
  --color-shadow-hover: rgba(0, 102, 204, 0.15);
  --font-heading: 'Poppins', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-nav: 'Space Mono', monospace;
  --max-width: 1200px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  font-size: 16px;
  overflow-x: hidden;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* Navigation */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: 0 2px 15px var(--color-shadow);
  z-index: 1000;
  transition: var(--transition);
}

.nav-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 80px;
}

/* Futuristic BP Monogram Logo */
.bp-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-secondary) 100%);
  border-radius: 12px;
  text-decoration: none;
  font-family: var(--font-nav);
  font-weight: 700;
  font-size: 22px;
  color: white;
  box-shadow: 0 4px 15px rgba(0, 102, 204, 0.3);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  clip-path: polygon(10% 0, 100% 0, 100% 90%, 90% 100%, 0 100%, 0 10%);
}

.bp-logo::before {
  content: '';
  position: absolute;
  inset: 2px;
  background: var(--color-card-bg);
  border-radius: 10px;
  z-index: 1;
  clip-path: polygon(10% 0, 100% 0, 100% 90%, 90% 100%, 0 100%, 0 10%);
  transition: var(--transition);
}

.bp-logo span {
  position: relative;
  z-index: 2;
  background: linear-gradient(135deg, var(--color-accent), var(--color-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  letter-spacing: -1px;
}

.bp-logo:hover {
  transform: translateY(-2px) scale(1.05);
  box-shadow: 0 8px 25px rgba(0, 168, 204, 0.4);
}

.bp-logo:hover::before {
  background: var(--color-bg);
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 35px;
}

/* Navigation Links with Space Mono */
.nav-link {
  font-family: var(--font-nav);
  color: var(--color-text);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  position: relative;
  padding: 0.5rem 0;
  transition: color 0.3s ease;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-secondary));
  transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  border-radius: 2px;
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-accent);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 5px;
  z-index: 1001;
}

.nav-toggle span {
  width: 30px;
  height: 3px;
  background-color: var(--color-text);
  transition: var(--transition);
  border-radius: 3px;
}

/* Hero Section */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 120px 20px 80px;
  overflow: hidden;
  background-color: var(--color-bg);
}

.hero-background {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at top right, rgba(0, 168, 204, 0.1), transparent 40%),
              radial-gradient(circle at bottom left, rgba(0, 102, 204, 0.1), transparent 40%);
  z-index: 0;
}

.floating-shape {
  position: absolute;
  border-radius: 50%;
  opacity: 0.5;
  animation: float 20s ease-in-out infinite;
  filter: blur(40px);
}

.shape-1 {
  width: 400px;
  height: 400px;
  background: rgba(0, 102, 204, 0.15);
  top: -10%;
  left: -10%;
  animation-delay: 0s;
}

.shape-2 {
  width: 300px;
  height: 300px;
  background: rgba(0, 168, 204, 0.15);
  top: 50%;
  right: -5%;
  animation-delay: -5s;
}

.shape-3 {
  width: 250px;
  height: 250px;
  background: rgba(0, 102, 204, 0.1);
  bottom: -10%;
  left: 20%;
  animation-delay: -10s;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(30px, -50px) scale(1.1); }
  66% { transform: translate(-20px, 20px) scale(0.9); }
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 900px;
}

.hero-name {
  font-family: var(--font-heading);
  font-size: 4rem;
  font-weight: 700;
  margin-bottom: 15px;
  color: var(--color-text);
  letter-spacing: -1px;
  animation: fadeInUp 1s ease;
}

.hero-headline {
  font-family: var(--font-heading);
  font-size: 1.8rem;
  font-weight: 600;
  margin-bottom: 15px;
  background: linear-gradient(135deg, var(--color-accent), var(--color-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: fadeInUp 1s ease 0.2s backwards;
}

.hero-tagline {
  font-size: 1.2rem;
  margin-bottom: 30px;
  color: #555;
  animation: fadeInUp 1s ease 0.4s backwards;
}

.typing-container {
  height: 40px;
  margin-bottom: 40px;
  font-family: var(--font-nav);
  animation: fadeInUp 1s ease 0.6s backwards;
}

.typing-text {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-accent);
}

.typing-cursor {
  font-size: 1.2rem;
  color: var(--color-text);
  animation: blink 1s infinite;
}

@keyframes blink {
  0%, 50% { opacity: 1; }
  51%, 100% { opacity: 0; }
}

.hero-intro {
  font-size: 1.1rem;
  line-height: 1.8;
  margin-bottom: 40px;
  color: #444;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
  animation: fadeInUp 1s ease 0.8s backwards;
}

.cta-button {
  display: inline-block;
  padding: 16px 40px;
  background: linear-gradient(135deg, var(--color-accent), var(--color-secondary));
  color: #ffffff;
  text-decoration: none;
  font-family: var(--font-nav);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  border-radius: 8px;
  transition: var(--transition);
  animation: fadeInUp 1s ease 1s backwards;
  box-shadow: 0 10px 20px rgba(0, 102, 204, 0.2);
  border: none;
  cursor: pointer;
}

.cta-button:hover {
  transform: translateY(-3px);
  box-shadow: 0 15px 25px rgba(0, 102, 204, 0.3);
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Section Styles */
section {
  padding: 100px 20px;
}

.section-title {
  font-family: var(--font-heading);
  font-size: 2.5rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 50px;
  color: var(--color-text);
  position: relative;
  display: inline-block;
  left: 50%;
  transform: translateX(-50%);
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-secondary));
  border-radius: 2px;
}

.section-subtitle {
  text-align: center;
  font-size: 1.1rem;
  color: #666;
  margin-top: -30px;
  margin-bottom: 50px;
}

/* Fade-in Animation */
.fade-in-section {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1), transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.fade-in-section.visible {
  opacity: 1;
  transform: translateY(0);
}

/* About Section */
.about {
  background-color: var(--color-card-bg);
}

.about-content {
  max-width: 800px;
  margin: 0 auto;
}

.about-text {
  font-size: 1.1rem;
  line-height: 1.8;
  margin-bottom: 25px;
  color: #444;
}

.about-quote {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-style: italic;
  text-align: center;
  padding: 30px;
  margin: 40px 0;
  border-left: 4px solid var(--color-accent);
  background-color: var(--color-bg);
  color: var(--color-accent);
  border-radius: 0 8px 8px 0;
}

/* Projects Section */
.project-filters {
  display: flex;
  justify-content: center;
  gap: 15px;
  margin-bottom: 50px;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 10px 25px;
  background-color: transparent;
  border: 2px solid var(--color-border);
  color: var(--color-text);
  font-family: var(--font-nav);
  font-weight: 700;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  cursor: pointer;
  border-radius: 30px;
  transition: var(--transition);
}

.filter-btn:hover,
.filter-btn.active {
  background-color: var(--color-accent);
  color: #ffffff;
  border-color: var(--color-accent);
  box-shadow: 0 5px 15px rgba(0, 102, 204, 0.2);
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 30px;
}

.project-card {
  background-color: var(--color-card-bg);
  padding: 40px 30px;
  border-radius: 16px;
  box-shadow: 0 10px 30px var(--color-shadow);
  transition: var(--transition);
  border: 1px solid rgba(0,0,0,0.05);
  display: flex;
  flex-direction: column;
}

.project-card.hidden {
  display: none;
}

.project-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 20px 40px var(--color-shadow-hover);
  border-color: rgba(0, 102, 204, 0.2);
}

.project-title {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 15px;
  color: var(--color-text);
}

.project-description {
  font-size: 1rem;
  line-height: 1.6;
  margin-bottom: 25px;
  color: #555;
  flex-grow: 1;
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 25px;
}

.tech-tag {
  padding: 6px 14px;
  background-color: var(--color-bg);
  color: var(--color-accent);
  font-family: var(--font-nav);
  font-size: 0.8rem;
  font-weight: 700;
  border-radius: 20px;
  border: 1px solid rgba(0, 102, 204, 0.1);
}

.project-btn {
  padding: 12px 25px;
  background-color: transparent;
  color: var(--color-accent);
  border: 2px solid var(--color-accent);
  border-radius: 8px;
  font-family: var(--font-nav);
  font-weight: 700;
  font-size: 0.9rem;
  text-transform: uppercase;
  cursor: pointer;
  transition: var(--transition);
  align-self: flex-start;
}

.project-btn:hover {
  background-color: var(--color-accent);
  color: #ffffff;
}

/* Articles Section */
.articles {
  background-color: var(--color-card-bg);
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 30px;
}

.article-card {
  background-color: var(--color-bg);
  padding: 35px;
  border-radius: 16px;
  box-shadow: 0 5px 20px var(--color-shadow);
  transition: var(--transition);
  border-left: 4px solid transparent;
}

.article-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 30px var(--color-shadow-hover);
  border-left-color: var(--color-secondary);
}

.article-title {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 15px;
  color: var(--color-text);
  line-height: 1.4;
}

.article-excerpt {
  font-size: 1rem;
  line-height: 1.6;
  margin-bottom: 25px;
  color: #555;
}

.article-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid var(--color-border);
  padding-top: 20px;
}

.article-date {
  font-family: var(--font-nav);
  font-size: 0.85rem;
  color: #888;
}

.article-btn {
  background: none;
  color: var(--color-accent);
  border: none;
  font-family: var(--font-nav);
  font-weight: 700;
  font-size: 0.9rem;
  cursor: pointer;
  transition: var(--transition);
  text-transform: uppercase;
}

.article-btn:hover {
  color: var(--color-secondary);
}

/* Technology Stack Section */
.tech-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 30px;
  max-width: 1000px;
  margin: 0 auto;
}

.tech-card {
  background-color: var(--color-card-bg);
  padding: 40px 20px;
  border-radius: 16px;
  text-align: center;
  box-shadow: 0 10px 30px var(--color-shadow);
  transition: var(--transition);
  border: 1px solid rgba(0,0,0,0.05);
}

.tech-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 20px 40px var(--color-shadow-hover);
  border-color: rgba(0, 102, 204, 0.2);
}

.tech-icon {
  font-family: var(--font-nav);
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: 20px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.tech-name {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-text);
}

/* Timeline Section */
.timeline {
  background-color: var(--color-card-bg);
}

.timeline-container {
  max-width: 900px;
  margin: 0 auto;
  position: relative;
  padding: 40px 0;
}

.timeline-container::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 4px;
  background: linear-gradient(to bottom, var(--color-accent), var(--color-secondary));
  transform: translateX(-50%);
  border-radius: 2px;
}

.timeline-item {
  position: relative;
  margin-bottom: 60px;
  width: 100%;
}

.timeline-left {
  padding-right: 50%;
  padding-left: 0;
}

.timeline-right {
  padding-left: 50%;
  padding-right: 0;
}

.timeline-content {
  background-color: var(--color-bg);
  padding: 30px;
  border-radius: 16px;
  box-shadow: 0 10px 30px var(--color-shadow);
  position: relative;
  width: 90%;
  transition: var(--transition);
}

.timeline-left .timeline-content {
  margin-left: auto;
  margin-right: 40px;
}

.timeline-right .timeline-content {
  margin-right: auto;
  margin-left: 40px;
}

.timeline-content:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 35px var(--color-shadow-hover);
}

/* Timeline Dots */
.timeline-left .timeline-content::after,
.timeline-right .timeline-content::after {
  content: '';
  position: absolute;
  top: 30px;
  width: 24px;
  height: 24px;
  background-color: var(--color-card-bg);
  border: 4px solid var(--color-accent);
  border-radius: 50%;
  z-index: 1;
}

.timeline-left .timeline-content::after {
  right: -54px;
}

.timeline-right .timeline-content::after {
  left: -54px;
}

.timeline-year {
  font-family: var(--font-nav);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: 15px;
}

.timeline-title {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 15px;
  color: var(--color-text);
}

.timeline-description {
  font-size: 1rem;
  line-height: 1.6;
  color: #555;
}

/* Gallery Section */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 25px;
}

.gallery-item {
  cursor: pointer;
  overflow: hidden;
  border-radius: 16px;
  box-shadow: 0 10px 30px var(--color-shadow);
  transition: var(--transition);
  position: relative;
}

.gallery-item:hover {
  transform: scale(1.03);
  box-shadow: 0 20px 40px var(--color-shadow-hover);
}

.gallery-placeholder {
  width: 100%;
  height: 280px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  font-family: var(--font-heading);
  font-size: 1.3rem;
  font-weight: 700;
  text-align: center;
  padding: 20px;
  transition: var(--transition);
}

.gallery-item:hover .gallery-placeholder {
  filter: brightness(1.1);
}

.gallery-text {
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
  z-index: 2;
}

/* Lightbox */
.lightbox {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(26, 26, 26, 0.95);
  backdrop-filter: blur(5px);
  z-index: 2000;
  align-items: center;
  justify-content: center;
  padding: 40px;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.lightbox.active {
  display: flex;
  opacity: 1;
}

.lightbox-close {
  position: absolute;
  top: 30px;
  right: 40px;
  font-size: 3rem;
  color: #ffffff;
  background: none;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  font-family: var(--font-nav);
}

.lightbox-close:hover {
  color: var(--color-secondary);
  transform: scale(1.1);
}

.lightbox-content {
  max-width: 900px;
  width: 100%;
  text-align: center;
  transform: scale(0.9);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.lightbox.active .lightbox-content {
  transform: scale(1);
}

.lightbox-image {
  width: 100%;
  border-radius: 16px;
  margin-bottom: 25px;
  box-shadow: 0 20px 50px rgba(0,0,0,0.5);
  overflow: hidden;
}

.lightbox-caption {
  color: #ffffff;
  font-size: 1.2rem;
  line-height: 1.6;
  font-family: var(--font-heading);
}

/* Tech Lab Section */
.tech-lab {
  background-color: var(--color-card-bg);
}

.lab-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 30px;
}

.lab-card {
  background-color: var(--color-bg);
  padding: 40px 30px;
  border-radius: 16px;
  box-shadow: 0 10px 30px var(--color-shadow);
  transition: var(--transition);
  border-top: 4px solid var(--color-secondary);
  display: flex;
  flex-direction: column;
}

.lab-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 20px 40px var(--color-shadow-hover);
}

.lab-title {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 15px;
  color: var(--color-text);
}

.lab-description {
  font-size: 1rem;
  line-height: 1.6;
  margin-bottom: 25px;
  color: #555;
  flex-grow: 1;
}

.lab-status {
  display: inline-block;
  padding: 8px 16px;
  background-color: rgba(0, 168, 204, 0.1);
  color: var(--color-secondary);
  font-family: var(--font-nav);
  font-size: 0.85rem;
  font-weight: 700;
  border-radius: 20px;
  align-self: flex-start;
}

/* Contact Section */
.contact-content {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 60px;
  max-width: 1000px;
  margin: 0 auto;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 30px;
}

.contact-text {
  font-size: 1.1rem;
  line-height: 1.8;
  color: #444;
}

.contact-links {
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.contact-link {
  display: flex;
  align-items: center;
  gap: 15px;
  padding: 15px 25px;
  background-color: var(--color-card-bg);
  color: var(--color-text);
  text-decoration: none;
  border-radius: 12px;
  box-shadow: 0 5px 15px var(--color-shadow);
  transition: var(--transition);
  font-family: var(--font-nav);
  font-weight: 700;
  font-size: 0.95rem;
}

.contact-link:hover {
  background: linear-gradient(135deg, var(--color-accent), var(--color-secondary));
  color: #ffffff;
  transform: translateX(10px);
  box-shadow: 0 10px 25px rgba(0, 102, 204, 0.2);
}

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

.contact-form {
  background-color: var(--color-card-bg);
  padding: 40px;
  border-radius: 16px;
  box-shadow: 0 10px 30px var(--color-shadow);
}

.form-group {
  margin-bottom: 25px;
}

.form-label {
  display: block;
  font-family: var(--font-nav);
  font-weight: 700;
  font-size: 0.9rem;
  margin-bottom: 10px;
  color: var(--color-text);
  text-transform: uppercase;
}

.form-input,
.form-textarea {
  width: 100%;
  padding: 15px;
  border: 2px solid var(--color-border);
  border-radius: 8px;
  font-family: var(--font-body);
  font-size: 1rem;
  transition: var(--transition);
  background-color: var(--color-bg);
  color: var(--color-text);
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 4px rgba(0, 102, 204, 0.1);
}

.form-error {
  display: block;
  color: #dc3545;
  font-size: 0.85rem;
  margin-top: 8px;
  font-family: var(--font-nav);
}

.form-submit {
  width: 100%;
  padding: 16px;
  background: linear-gradient(135deg, var(--color-accent), var(--color-secondary));
  color: #ffffff;
  border: none;
  border-radius: 8px;
  font-family: var(--font-nav);
  font-size: 1rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 5px 15px rgba(0, 102, 204, 0.2);
}

.form-submit:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 25px rgba(0, 102, 204, 0.3);
}

.form-message {
  margin-top: 20px;
  padding: 15px;
  border-radius: 8px;
  text-align: center;
  font-weight: 500;
  display: none;
  font-family: var(--font-body);
}

.form-message.success {
  display: block;
  background-color: #d4edda;
  color: #155724;
  border: 1px solid #c3e6cb;
}

.form-message.error {
  display: block;
  background-color: #f8d7da;
  color: #721c24;
  border: 1px solid #f5c6cb;
}

/* Footer */
.footer {
  background-color: var(--color-text);
  color: #ffffff;
  padding: 60px 20px;
  text-align: center;
}

.footer-text {
  font-family: var(--font-nav);
  font-size: 1rem;
  margin-bottom: 15px;
  font-weight: 700;
}

.footer-message {
  font-size: 1.1rem;
  opacity: 0.8;
  max-width: 600px;
  margin: 0 auto;
}

/* Responsive Design */
@media (max-width: 992px) {
  .timeline-container::before {
    left: 30px;
  }

  .timeline-left,
  .timeline-right {
    padding-left: 80px;
    padding-right: 0;
  }

  .timeline-left .timeline-content,
  .timeline-right .timeline-content {
    margin: 0;
    width: 100%;
  }

  .timeline-left .timeline-content::after,
  .timeline-right .timeline-content::after {
    left: -62px;
    right: auto;
  }
  
  .contact-content {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 80px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 80px);
    background-color: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    flex-direction: column;
    align-items: center;
    padding: 40px 0;
    transition: var(--transition);
    box-shadow: 0 10px 20px var(--color-shadow);
  }

  .nav-menu.active {
    left: 0;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
  }

  .nav-toggle.active span:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
  }

  .hero-name {
    font-size: 2.8rem;
  }

  .hero-headline {
    font-size: 1.4rem;
  }

  .section-title {
    font-size: 2rem;
  }
}

@media (max-width: 480px) {
  .hero-name {
    font-size: 2.2rem;
  }

  .hero-headline {
    font-size: 1.2rem;
  }
  
  .projects-grid,
  .articles-grid,
  .lab-grid,
  .gallery-grid {
    grid-template-columns: 1fr;
  }
  
  .timeline-left,
  .timeline-right {
    padding-left: 60px;
  }
  
  .timeline-container::before {
    left: 20px;
  }
  
  .timeline-left .timeline-content::after,
  .timeline-right .timeline-content::after {
    left: -52px;
  }
}