:root {
  --bg: #ffffff;
  --bg-alt: #fff8f3;
  --accent: #ff6b35;
  --accent-dark: #000000;
  --accent-light: #ff8c5a;
  --border: #ffe4d6;
  --text: #1a1a1a;
  --text-muted: #666666;
  --radius: 8px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
  box-sizing: border-box;
}

html, body {
  height: 100%;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", sans-serif;
  font-size: 16px;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.6;
  padding-top: 70px;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--accent-light);
}

.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 24px;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(8px);
  background-color: rgba(255, 255, 255, 0.95);
  padding: 16px 0;
  z-index: 100;
}

.site-banner {
  padding: 12px 24px;
  text-align: center;
  background: linear-gradient(135deg, #ff6b35, #ff8c5a);
  color: white;
  font-weight: 700;
  font-size: 16px;
  letter-spacing: 0.3px;
  animation: blinkBanner 1.8s linear infinite;
  border-bottom: 1px solid rgba(255, 255, 255, 0.4);
}

.site-banner p {
  margin: 0;
}

@keyframes blinkBanner {
  0% {
    opacity: 1;
    text-shadow: 0 0 8px rgba(255, 255, 255, 0.8);
  }
  50% {
    opacity: 0.55;
    text-shadow: 0 0 4px rgba(255, 255, 255, 0.5);
  }
  100% {
    opacity: 1;
    text-shadow: 0 0 8px rgba(255, 255, 255, 0.8);
  }
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 24px;
}

.brand {
  font-weight: 800;
  font-size: 18px;
  letter-spacing: 0.5px;
  color: var(--accent);
  text-decoration: none;
  cursor: pointer;
  flex: 0 0 auto;
  margin-right: 40px;
}

.brand:hover {
  color: var(--accent-light);
}

.nav {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-left: auto;
  flex-wrap: nowrap;
  justify-content: flex-end;
}

.nav a {
  text-decoration: none;
  color: var(--text-muted);
  font-weight: 700;
  font-size: 13px;
  transition: var(--transition);
  white-space: nowrap;
}

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

.nav a.cta {
  color: var(--bg);
  border: 1px solid var(--accent);
  padding: 6px 12px;
  border-radius: var(--radius);
  background: var(--accent);
  font-weight: 600;
  font-size: 12px;
}

.nav a.cta:hover {
  background: var(--accent-light);
  border-color: var(--accent-light);
}

.language-switcher {
  display: flex;
  gap: 4px;
  margin-left: 16px;
}

.lang-btn {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: 6px 10px;
  border-radius: 4px;
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
  transition: var(--transition);
}

.lang-btn:hover {
  color: var(--text);
  border-color: var(--text);
}

.lang-btn.active {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}

.hero {
  padding: 80px 0 60px;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 48px;
  align-items: center;
}

.hero > .container > div:first-child {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.eyebrow {
  color: var(--text-muted);
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin: 0 0 8px;
}

.hero h1 {
  margin: 0 0 12px;
  font-size: 48px;
  font-weight: 700;
  letter-spacing: -1.5px;
  line-height: 1.2;
}

.sub {
  color: var(--text-muted);
  margin: 0 0 24px;
  font-size: 16px;
  font-weight: 500;
}

.hero-actions {
  display: flex;
  gap: 12px;
  margin-bottom: 48px;
}

.btn {
  display: inline-block;
  padding: 12px 20px;
  border-radius: var(--radius);
  background: var(--accent);
  color: var(--bg);
  text-decoration: none;
  font-weight: 600;
  font-size: 14px;
  border: 1px solid var(--accent);
  transition: var(--transition);
  cursor: pointer;
}

.btn:hover {
  background: var(--accent-light);
  border-color: var(--accent-light);
}

.btn-ghost {
  background: transparent;
  color: var(--accent);
  border: 2px solid var(--accent);
}

.btn-ghost:hover {
  border-color: var(--accent-light);
  background: var(--bg-alt);
  color: var(--accent-light);
}

.hero-card {
  background: var(--bg-alt);
  padding: 32px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.hero-card h3 {
  margin: 0 0 16px;
  font-size: 14px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
}

.hero-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text);
}

#about {
  background: var(--bg-alt);
  padding: 48px 24px;
  margin: 48px 0;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  max-width: 1000px;
  margin-left: auto;
  margin-right: auto;
}

#about h2 {
  margin-top: 0;
  font-size: 28px;
  margin-bottom: 24px;
}

#about p {
  font-size: 16px;
  line-height: 1.8;
  color: var(--text);
  margin: 0;
}

.hero-image {
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-image img {
  width: 100%;
  max-width: 300px;
  height: 300px;
  border-radius: 50%;
  object-fit: cover;
  border: 3px solid var(--accent);
  box-shadow: 0 10px 40px rgba(255, 107, 53, 0.2);
}

.section {
  padding: 64px 0;
  border-top: 1px solid var(--border);
}

h2 {
  font-size: 28px;
  font-weight: 700;
  margin: 0 0 32px;
  letter-spacing: -0.5px;
  color: var(--accent-dark);
  position: relative;
  padding-bottom: 12px;
}

h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 40px;
  height: 3px;
  background: var(--accent);
  border-radius: 2px;
}

h3 {
  font-size: 16px;
  font-weight: 700;
  margin: 0 0 8px;
  color: var(--text);
}

h4 {
  font-size: 15px;
  font-weight: 700;
  margin: 0 0 6px;
  color: var(--text);
}

p {
  margin: 0 0 12px;
  font-size: 15px;
}

ul {
  margin: 0;
  padding-left: 20px;
}

ul li {
  margin-bottom: 10px;
  color: var(--text);
}

ul li a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
  transition: var(--transition);
}

ul li a:hover {
  color: var(--accent-light);
  text-decoration: underline;
}

.timeline a {
  font-weight: 600;
  background: linear-gradient(120deg, rgba(255, 107, 53, 0.1), rgba(255, 140, 90, 0.1));
  padding: 2px 6px;
  border-radius: 4px;
  transition: var(--transition);
}

.timeline a:hover {
  background: linear-gradient(120deg, rgba(255, 107, 53, 0.2), rgba(255, 140, 90, 0.2));
}

.timeline strong {
  font-weight: 700;
  color: var(--accent);
  background: linear-gradient(120deg, rgba(255, 107, 53, 0.1), rgba(255, 140, 90, 0.1));
  padding: 2px 6px;
  border-radius: 4px;
}

.timeline .muted {
  font-weight: 600;
  background: rgba(26, 26, 26, 0.05);
  padding: 2px 6px;
  border-radius: 4px;
  display: inline-block;
}

.timeline li strong {
  background: rgba(26, 26, 26, 0.05);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--text);
}

.timeline {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.timeline article {
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-alt);
  transition: var(--transition);
  border-left: 4px solid var(--accent);
}

.timeline article:hover {
  border-left-color: var(--accent-light);
  box-shadow: 0 4px 12px rgba(255, 107, 53, 0.1);
}

.muted {
  color: var(--text-muted);
  font-size: 14px;
}

.edu {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.edu h4 {
  margin-bottom: 6px;
}

.education-items {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.education-card {
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-alt);
  transition: var(--transition);
  border-left: 4px solid var(--accent);
}

.education-card:hover {
  border-left-color: var(--accent-light);
  box-shadow: 0 4px 12px rgba(255, 107, 53, 0.1);
}

.education-card h4 {
  margin: 0 0 8px;
  color: var(--text);
  font-size: 16px;
}

.education-school {
  margin: 0 0 4px;
  font-weight: 600;
  color: var(--text);
  font-size: 14px;
}

.education-year {
  margin: 0 0 12px;
  color: var(--accent);
  font-weight: 600;
  font-size: 13px;
}

.education-card ul {
  margin: 0;
  padding-left: 20px;
}

.education-card ul li {
  margin-bottom: 8px;
  color: var(--text);
  font-size: 14px;
  font-weight: 500;
}

.certifications-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.cert-card {
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-alt);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.cert-card:hover {
  border-color: var(--accent);
  box-shadow: 0 4px 12px rgba(255, 107, 53, 0.1);
  transform: translateY(-2px);
}

.cert-icon {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, var(--accent), var(--accent-light));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 12px;
  overflow: hidden;
  box-shadow: 0 4px 12px rgba(255, 107, 53, 0.2);
}

.cert-icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.cert-card h4 {
  margin: 0 0 8px;
  font-size: 16px;
}

.cert-card h4 a {
  color: var(--text);
  text-decoration: none;
  transition: var(--transition);
}

.cert-card h4 a:hover {
  color: var(--accent);
}

.cert-card .muted {
  margin: 0;
  font-size: 13px;
}

.publication-card {
  padding: 28px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-alt);
  transition: var(--transition);
  border-left: 4px solid var(--accent);
}

.publication-card:hover {
  border-left-color: var(--accent-light);
  box-shadow: 0 4px 12px rgba(255, 107, 53, 0.1);
  transform: translateX(4px);
}

.publication-card h4 {
  margin: 0 0 12px;
  font-size: 17px;
  color: var(--text);
  line-height: 1.6;
}

.pub-meta {
  margin: 0 0 8px;
  color: var(--accent);
  font-weight: 600;
  font-size: 14px;
}

.pub-details {
  margin: 0 0 16px;
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.6;
}

.pub-link {
  display: inline-block;
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
  font-size: 14px;
  transition: var(--transition);
}

.pub-link:hover {
  color: var(--accent-light);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.grid-3 > div {
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-alt);
  transition: var(--transition);
  border-top: 3px solid var(--accent);
}

.grid-3 > div:hover {
  box-shadow: 0 4px 12px rgba(255, 107, 53, 0.1);
  border-top-color: var(--accent-light);
}

.grid-3 h4 {
  margin-bottom: 12px;
}

.grid-3 p {
  font-size: 14px;
  color: var(--text-muted);
  margin: 0;
}

  .skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
  }.skill-tag {
  display: inline-block;
  background: linear-gradient(135deg, rgba(255, 107, 53, 0.2), rgba(255, 140, 90, 0.2));
  color: var(--accent);
  border: 1px solid rgba(255, 107, 53, 0.3);
  padding: 6px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.3px;
  transition: var(--transition);
  box-shadow: 0 1px 4px rgba(255, 107, 53, 0.1);
}

.skill-tag:hover {
  transform: translateY(-2px);
  background: linear-gradient(135deg, rgba(255, 107, 53, 0.3), rgba(255, 140, 90, 0.3));
  border-color: rgba(255, 107, 53, 0.5);
  box-shadow: 0 2px 8px rgba(255, 107, 53, 0.15);
}

.projects {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.project-card {
  background: var(--bg-alt);
  padding: 28px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  transition: var(--transition);
}

.project-card:hover {
  border-color: var(--accent);
  box-shadow: 0 8px 24px rgba(255, 107, 53, 0.15);
  transform: translateY(-2px);
}

.project-card h4 {
  margin-bottom: 12px;
}

.project-card p {
  font-size: 14px;
  margin-bottom: 12px;
}

.project-description {
  font-size: 15px !important;
  color: var(--text) !important;
  line-height: 1.8;
  margin-bottom: 16px !important;
  padding: 16px;
  background: linear-gradient(135deg, rgba(255, 107, 53, 0.05), rgba(255, 140, 90, 0.05));
  border-left: 3px solid var(--accent);
  border-radius: 4px;
}

.proj-link {
  display: inline-block;
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
  font-size: 14px;
  transition: var(--transition);
}

.proj-link:hover {
  color: var(--accent-light);
}

.languages-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
}

.language-card {
  padding: 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-alt);
  transition: var(--transition);
  text-align: center;
  border-top: 3px solid var(--accent);
}

.language-card:hover {
  box-shadow: 0 4px 12px rgba(255, 107, 53, 0.1);
  border-top-color: var(--accent-light);
}

.language-card h4 {
  margin: 0 0 8px;
  font-size: 16px;
}

.lang-level {
  margin: 0;
  color: var(--accent);
  font-weight: 600;
  font-size: 13px;
}

.volunteer-card {
  padding: 28px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-alt);
  transition: var(--transition);
  border-left: 4px solid var(--accent);
}

.volunteer-card:hover {
  border-left-color: var(--accent-light);
  box-shadow: 0 4px 12px rgba(255, 107, 53, 0.1);
}

.volunteer-card h4 {
  margin: 0 0 8px;
  font-size: 16px;
}

.volunteer-org {
  margin: 0 0 12px;
  color: var(--accent);
  font-weight: 600;
  font-size: 14px;
}

.volunteer-desc {
  margin: 0;
  color: var(--text);
  font-size: 14px;
  line-height: 1.7;
}

.contact-wrapper {
  max-width: 100%;
  margin: 0 auto;
}

.contact-card {
  background: var(--bg-alt);
  border-left: 4px solid var(--accent);
  border-radius: var(--radius);
  padding: 40px;
}

.contact-card h3 {
  margin: 0 0 8px;
  font-size: 24px;
  color: var(--text);
}

.contact-card > p {
  margin: 0 0 24px;
  color: var(--text-muted);
  font-size: 15px;
  line-height: 1.6;
}

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

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-group {
  display: flex;
  flex-direction: column;
}

.form-group label {
  margin-bottom: 8px;
  font-weight: 600;
  font-size: 13px;
  color: var(--text);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.form-group input,
.form-group textarea {
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-family: inherit;
  font-size: 14px;
  color: var(--text);
  background: var(--bg);
  transition: var(--transition);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-muted);
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
  font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
  background: white;
  box-shadow: 0 0 0 3px rgba(255, 107, 53, 0.1);
}

.contact-form .btn {
  align-self: flex-start;
  margin-top: 8px;
  padding: 12px 24px;
  font-size: 14px;
  font-weight: 600;
  background: var(--accent);
  color: white;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: var(--transition);
}

.contact-form .btn:hover {
  background: var(--accent-light);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(255, 107, 53, 0.3);
}

/* Responsive */
@media (max-width: 640px) {
  .contact-card {
    padding: 24px;
  }

  .form-row {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .contact-card h3 {
    font-size: 20px;
  }
}

.contact {
  text-align: center;
}

.contact a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 600;
  transition: var(--transition);
}

.contact a:hover {
  color: var(--accent-light);
}

.site-footer {
  padding: 40px 0 20px;
  color: var(--text-muted);
  font-size: 13px;
  border-top: 1px solid var(--border);
  background: var(--bg-alt);
}

.footer-content {
  display: flex;
  align-items: center;
  justify-content: center;
  max-width: 1000px;
  margin: 0 auto;
  padding: 0 24px;
}

.footer-links {
  display: flex;
  gap: 32px;
  justify-content: center;
}

.footer-links a {
  color: var(--text);
  text-decoration: none;
  font-weight: 600;
  font-size: 14px;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.footer-icon {
  width: 20px;
  height: 20px;
  object-fit: contain;
  transition: var(--transition);
}

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

.footer-links a:hover .footer-icon {
  transform: scale(1.2);
}

.footer-bottom {
  text-align: center;
  padding: 16px 0 0;
  margin-top: 20px;
  border-top: 1px solid var(--border);
}

.footer-bottom p {
  margin: 0;
  font-size: 12px;
  color: var(--text-muted);
}

@media (max-width: 640px) {
  .site-footer {
    padding: 32px 0 16px;
  }
  
  .footer-links {
    gap: 16px;
    flex-direction: column;
  }
  
  .footer-links a {
    font-size: 13px;
  }
}

/* Responsive */
@media (max-width: 900px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .projects {
    grid-template-columns: 1fr;
  }
  
  .certifications-list {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .nav {
    gap: 12px;
    font-size: 12px;
  }
  
  .hero h1 {
    font-size: 36px;
  }
  
  .section {
    padding: 40px 0;
  }
}

@media (max-width: 768px) {
  .nav {
    display: none;
  }
  
  .language-switcher {
    margin-left: 0;
  }
}

@media (max-width: 640px) {
  body {
    padding-top: 70px;
  }
  
  .container {
    padding: 0 24px;
    margin: 0 auto;
  }
  
  .header-inner {
    padding: 0 24px;
  }
  
  .site-banner {
    padding: 12px 24px;
    margin-left: -24px;
    margin-right: -24px;
    width: calc(100% + 48px);
  }
  
  .nav {
    display: none;
  }
  
  .language-switcher {
    margin-left: auto;
    padding-left: 12px;
    gap: 2px;
  }
  
  .lang-btn {
    padding: 4px 8px;
    font-size: 11px;
  }
  
  h2 {
    font-size: 24px;
    margin-bottom: 24px;
  }
  
  .hero h1 {
    font-size: 28px;
  }
  
  .hero {
    padding: 48px 0 32px;
  }
  
  .hero-inner {
    gap: 24px;
  }
  
  .hero-image img {
    width: 200px;
    height: 200px;
  }
  
  .grid-3 {
    grid-template-columns: 1fr;
  }
  
  .hero-actions {
    flex-direction: column;
  }
  
  .btn {
    width: 100%;
    text-align: center;
  }
  
  .section {
    padding: 32px 0;
  }
  
  .timeline {
    gap: 24px;
  }
  
  article {
    padding: 16px;
  }
  
  article h3 {
    font-size: 16px;
  }
  
  article ul {
    margin: 8px 0;
  }
  
  article li {
    font-size: 14px;
    margin-bottom: 8px;
  }
  
  .education-items {
    gap: 16px;
  }
  
  .projects {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  
  .certifications-list {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  
  .languages-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  
  .skills-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  
  .skill-tag {
    font-size: 12px;
    padding: 4px 8px;
  }
  
  #about {
    padding: 24px 16px;
    margin: 24px 0;
  }
  
  #about h2 {
    font-size: 20px;
  }
  
  #about p {
    font-size: 14px;
  }
}