/* ===== Reset & Base ===== */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --color-bg: #fafaf9;
  --color-bg-alt: #f0efeb;
  --color-text: #1a1a1a;
  --color-text-muted: #6b6b6b;
  --color-accent: #2d6a4f;
  --color-accent-light: #40916c;
  --color-accent-bg: #d8f3dc;
  --color-border: #e0ddd5;
  --color-white: #ffffff;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-serif: 'Playfair Display', Georgia, serif;
  --container-max: 1100px;
  --transition: 0.3s ease;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

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

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ===== Navigation ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 1.25rem 0;
  transition: all var(--transition);
}

.navbar.scrolled {
  background: rgba(250, 250, 249, 0.95);
  backdrop-filter: blur(10px);
  padding: 0.75rem 0;
  box-shadow: 0 1px 0 var(--color-border);
}

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

.nav-logo {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text);
}

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

.nav-links {
  display: flex;
  list-style: none;
  gap: 2rem;
}

.nav-links a {
  color: var(--color-text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  transition: color var(--transition);
}

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

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--color-text);
  transition: all var(--transition);
}

/* ===== Hero ===== */
.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 6rem 0 3rem;
  position: relative;
}

.hero-content {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 4rem;
}

.hero-greeting {
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-accent);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

.hero-name {
  font-family: var(--font-serif);
  font-size: clamp(3rem, 7vw, 5rem);
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 1rem;
  color: var(--color-text);
}

.hero-tagline {
  font-size: 1.25rem;
  font-weight: 400;
  color: var(--color-text-muted);
  margin-bottom: 1.5rem;
}

.hero-description {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  max-width: 520px;
  margin-bottom: 2rem;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

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

.hero-shape {
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-light));
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 20px 60px rgba(45, 106, 79, 0.2);
}

.hero-initials {
  font-family: var(--font-serif);
  font-size: 5rem;
  font-weight: 700;
  color: white;
  letter-spacing: 0.05em;
}

.scroll-indicator {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-text-muted);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

.scroll-line {
  width: 1px;
  height: 40px;
  background: var(--color-border);
  animation: scroll-pulse 2s ease-in-out infinite;
}

@keyframes scroll-pulse {
  0%, 100% { opacity: 0.3; transform: scaleY(0.5); }
  50% { opacity: 1; transform: scaleY(1); }
}

/* ===== Buttons ===== */
.btn {
  display: inline-block;
  padding: 0.75rem 1.75rem;
  border-radius: 6px;
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  transition: all var(--transition);
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--color-accent);
  color: var(--color-white);
}

.btn-primary:hover {
  background: var(--color-accent-light);
  color: var(--color-white);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(45, 106, 79, 0.3);
}

.btn-outline {
  background: transparent;
  color: var(--color-accent);
  border: 1.5px solid var(--color-accent);
}

.btn-outline:hover {
  background: var(--color-accent);
  color: var(--color-white);
  transform: translateY(-1px);
}

/* ===== Sections ===== */
.section {
  padding: 6rem 0;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

.section-alt {
  background: var(--color-bg-alt);
}

.section-title {
  font-family: var(--font-serif);
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: var(--color-text);
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  max-width: 600px;
  margin-bottom: 3rem;
}

/* ===== About ===== */
.about-intro {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 3rem;
  align-items: center;
  margin-bottom: 3rem;
}

.about-photo img {
  width: 280px;
  height: 280px;
  object-fit: cover;
  border-radius: 50%;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.1);
}

.about-lead {
  font-size: 1.15rem;
  font-weight: 400;
  color: var(--color-text);
  margin-bottom: 1rem;
}

.about-text p {
  margin-bottom: 1rem;
  color: var(--color-text-muted);
}

.about-highlights {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
  margin-bottom: 4rem;
}

.highlight-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: 1.5rem;
  text-align: center;
  transition: transform var(--transition), box-shadow var(--transition);
}

.highlight-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
}

.highlight-number {
  display: block;
  font-family: var(--font-serif);
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1.2;
}

.highlight-label {
  font-size: 0.85rem;
  color: var(--color-text-muted);
}

/* ===== Education Timeline ===== */
.education-timeline h3 {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  margin-bottom: 1.5rem;
}

.timeline {
  border-left: 2px solid var(--color-border);
  padding-left: 2rem;
}

.timeline-item {
  position: relative;
  margin-bottom: 1.5rem;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -2.375rem;
  top: 0.4rem;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-accent);
  border: 2px solid var(--color-bg);
}

.timeline-date {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: 0.25rem;
}

.timeline-content {
  font-size: 0.95rem;
  line-height: 1.6;
}

.muted {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

/* ===== Projects ===== */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1.5rem;
}

.project-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 2rem;
  transition: transform var(--transition), box-shadow var(--transition);
}

.project-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.08);
}

.project-icon {
  width: 44px;
  height: 44px;
  margin-bottom: 1.25rem;
  color: var(--color-accent);
}

.project-icon svg {
  width: 100%;
  height: 100%;
}

.project-card h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

.project-card p {
  font-size: 0.92rem;
  color: var(--color-text-muted);
  margin-bottom: 1.25rem;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.project-tags span {
  background: var(--color-accent-bg);
  color: var(--color-accent);
  font-size: 0.78rem;
  font-weight: 500;
  padding: 0.3rem 0.7rem;
  border-radius: 20px;
}

/* ===== Publications ===== */
.awards-section {
  margin-bottom: 3rem;
}

.awards-section h3 {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.awards-list {
  list-style: none;
}

.awards-list li {
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.95rem;
  color: var(--color-text-muted);
}

.awards-list li strong {
  color: var(--color-text);
}

.pub-links {
  display: flex;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.pub-link-card {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: 1rem 1.5rem;
  font-weight: 500;
  color: var(--color-text);
  transition: all var(--transition);
}

.pub-link-card:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
}

.pub-link-card svg {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
}

/* ===== Podcast ===== */
.podcast-content {
  max-width: 700px;
  display: flex;
  gap: 2.5rem;
  align-items: flex-start;
}

.podcast-logo {
  flex-shrink: 0;
}

.podcast-logo img {
  width: 180px;
  height: 180px;
  object-fit: contain;
  border-radius: 16px;
}

.podcast-info p {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  margin-bottom: 1rem;
}

.podcast-links {
  display: flex;
  gap: 1rem;
  margin-top: 1.5rem;
  flex-wrap: wrap;
}

/* ===== Skills ===== */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 2rem;
  margin-bottom: 3rem;
}

.skill-category h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-size: 0.85rem;
}

.skill-list {
  list-style: none;
}

.skill-list li {
  padding: 0.4rem 0;
  font-size: 0.92rem;
  color: var(--color-text-muted);
  border-bottom: 1px solid var(--color-border);
}

.skill-list li:last-child {
  border-bottom: none;
}

.languages-bar h3 {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.lang-items {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
}

.lang-item {
  display: flex;
  flex-direction: column;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 1rem 1.5rem;
  min-width: 140px;
  text-align: center;
}

.lang-name {
  font-weight: 600;
  font-size: 0.95rem;
  margin-bottom: 0.25rem;
}

.lang-level {
  font-size: 0.82rem;
  color: var(--color-text-muted);
}

/* ===== Contact ===== */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1.25rem;
}

.contact-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 2rem 1.5rem;
  text-align: center;
  color: var(--color-text);
  transition: all var(--transition);
}

.contact-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
}

.contact-card svg {
  width: 32px;
  height: 32px;
  color: var(--color-accent);
}

.contact-label {
  font-weight: 600;
  font-size: 0.9rem;
}

.contact-value {
  font-size: 0.82rem;
  color: var(--color-text-muted);
}

/* ===== Blog ===== */
.blog-header {
  padding: 8rem 0 2rem;
  background: var(--color-bg-alt);
}

.blog-header-content {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.blog-logo {
  width: 120px;
  height: 120px;
  object-fit: contain;
  border-radius: 50%;
}

.blog-main {
  padding-top: 3rem;
}

.blog-grid {
  display: grid;
  gap: 2rem;
  max-width: 720px;
}

.blog-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 2rem;
  transition: transform var(--transition), box-shadow var(--transition);
}

.blog-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
}

.blog-date {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}

.blog-title {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: var(--color-text);
}

.blog-subtitle {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-text-muted);
  margin-bottom: 1rem;
}

.blog-subheading {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
  margin-top: 0.5rem;
  margin-bottom: 0.5rem;
}

.blog-excerpt {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.7;
  margin-bottom: 1rem;
}

.blog-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.blog-tags span {
  background: var(--color-accent-bg);
  color: var(--color-accent);
  font-size: 0.78rem;
  font-weight: 500;
  padding: 0.3rem 0.7rem;
  border-radius: 20px;
}

.nav-active {
  color: var(--color-accent) !important;
  font-weight: 600 !important;
}

.lang-toggle {
  background: var(--color-accent);
  color: var(--color-white);
  border: none;
  padding: 0.3rem 0.7rem;
  border-radius: 4px;
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  letter-spacing: 0.05em;
  transition: all var(--transition);
}

.lang-toggle:hover {
  background: var(--color-accent-light);
}

/* ===== Footer ===== */
.footer {
  padding: 2rem 0;
  text-align: center;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  border-top: 1px solid var(--color-border);
}

/* ===== Mobile ===== */
@media (max-width: 768px) {
  .nav-toggle {
    display: flex;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-bg);
    flex-direction: column;
    padding: 1rem 1.5rem 1.5rem;
    gap: 1rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  }

  .nav-links.active {
    display: flex;
  }

  .hero-content {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .hero-description {
    margin-left: auto;
    margin-right: auto;
  }

  .hero-cta {
    justify-content: center;
  }

  .hero-visual {
    order: -1;
  }

  .hero-shape {
    width: 180px;
    height: 180px;
  }

  .hero-initials {
    font-size: 3.5rem;
  }

  .about-intro {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .about-photo { order: -1; }
  .about-photo img { width: 200px; height: 200px; margin: 0 auto; }

  .about-highlights {
    grid-template-columns: 1fr 1fr;
  }

  .projects-grid {
    grid-template-columns: 1fr;
  }

  .skills-grid {
    grid-template-columns: 1fr 1fr;
  }

  .pub-links {
    flex-direction: column;
  }

  .section {
    padding: 4rem 0;
  }

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

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

  .podcast-content {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .podcast-logo img {
    width: 140px;
    height: 140px;
  }

  .podcast-links {
    justify-content: center;
    flex-direction: column;
    align-items: center;
  }

  .blog-header-content {
    flex-direction: column;
    text-align: center;
  }

  .blog-logo {
    width: 90px;
    height: 90px;
  }

  .blog-grid {
    max-width: 100%;
  }

  .lang-items {
    justify-content: center;
  }

  .about-text p {
    text-align: left;
  }
}

@media (max-width: 480px) {
  .skills-grid {
    grid-template-columns: 1fr;
  }

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

  .about-highlights {
    grid-template-columns: 1fr 1fr;
  }

  .hero-shape {
    width: 140px;
    height: 140px;
  }

  .hero-initials {
    font-size: 2.5rem;
  }

  .about-photo img {
    width: 160px;
    height: 160px;
  }

  .podcast-logo img {
    width: 120px;
    height: 120px;
  }

  .section-title {
    font-size: 1.75rem;
  }
}