@import url('https://fonts.googleapis.com/css2?family=Lora:ital,wght@0,400;0,500;0,600;1,400;1,500&family=Inter:wght@300;400;500&display=swap');

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --sand: #F5F0E8;
  --sand-dark: #E8E0CE;
  --dust: #D6CCBA;
  --green-mist: #8AAF8C;
  --green-deep: #4A7A5B;
  --green-dark: #2C5F3A;
  --ink: #2A2A2A;
  --ink-light: #555550;
  --ink-muted: #888880;
  --white: #FDFCF9;
  --nav-height: 68px;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', sans-serif;
  background: var(--white);
  color: var(--ink);
  font-size: 16px;
  line-height: 1.7;
  min-height: 100vh;
}

/* NAV */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-height);
  background: rgba(253, 252, 249, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--dust);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(1.5rem, 5vw, 4rem);
}

.nav-name {
  font-family: 'Lora', serif;
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--ink);
  text-decoration: none;
  letter-spacing: 0.01em;
}

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

.nav-links a {
  font-size: 0.875rem;
  font-weight: 400;
  color: var(--ink-light);
  text-decoration: none;
  letter-spacing: 0.02em;
  transition: color 0.2s;
}

.nav-links a:hover,
.nav-links a.active { color: var(--green-deep); }

.nav-links a.active {
  font-weight: 500;
}

/* HAMBURGER */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 4px;
}
.hamburger span {
  display: block;
  width: 22px;
  height: 1.5px;
  background: var(--ink);
  transition: all 0.3s;
}

.mobile-menu {
  display: none;
  position: fixed;
  top: var(--nav-height);
  left: 0; right: 0;
  background: var(--white);
  border-bottom: 1px solid var(--dust);
  padding: 1.5rem clamp(1.5rem, 5vw, 4rem);
  z-index: 99;
  flex-direction: column;
  gap: 1.25rem;
}
.mobile-menu a {
  font-size: 1rem;
  color: var(--ink-light);
  text-decoration: none;
}
.mobile-menu a:hover { color: var(--green-deep); }
.mobile-menu.open { display: flex; }

/* MAIN LAYOUT */
main { padding-top: var(--nav-height); }

/* PAGE HERO */
.page-hero {
  background: var(--sand);
  padding: clamp(3rem, 8vw, 5rem) clamp(1.5rem, 5vw, 4rem) clamp(2.5rem, 6vw, 4rem);
  border-bottom: 1px solid var(--dust);
}

.page-hero-inner {
  max-width: 860px;
  margin: 0 auto;
}

.page-hero-label {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--green-deep);
  margin-bottom: 0.75rem;
}

.page-hero h1 {
  font-family: 'Lora', serif;
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 500;
  color: var(--ink);
  line-height: 1.2;
}

/* CONTENT */
.content-section {
  padding: clamp(2.5rem, 6vw, 4rem) clamp(1.5rem, 5vw, 4rem);
  max-width: 860px;
  margin: 0 auto;
}

.content-section + .content-section {
  border-top: 1px solid var(--sand-dark);
}

.section-label {
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--green-mist);
  margin-bottom: 1.5rem;
}

/* TYPOGRAPHY */
h2 {
  font-family: 'Lora', serif;
  font-size: 1.5rem;
  font-weight: 500;
  color: var(--ink);
  margin-bottom: 1rem;
}

h3 {
  font-family: 'Lora', serif;
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--ink);
  margin-bottom: 0.35rem;
}

p {
  color: var(--ink-light);
  margin-bottom: 1rem;
}

p:last-child { margin-bottom: 0; }

/* PUBLICATION CARD */
.pub-list {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.pub-card {
  padding: 1.25rem 1.5rem;
  border: 1px solid var(--sand-dark);
  border-radius: 8px;
  background: var(--white);
  border-left: 3px solid var(--green-mist);
  transition: border-left-color 0.2s;
}

.pub-card:hover { border-left-color: var(--green-deep); }

.pub-year {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--green-deep);
  margin-bottom: 0.35rem;
}

.pub-title {
  font-family: 'Lora', serif;
  font-size: 1rem;
  font-weight: 500;
  color: var(--ink);
  margin-bottom: 0.35rem;
  line-height: 1.4;
}

.pub-authors {
  font-size: 0.85rem;
  color: var(--ink-muted);
  margin-bottom: 0.25rem;
}

.pub-venue {
  font-size: 0.85rem;
  color: var(--ink-light);
  font-style: italic;
}

/* TEACHING */
.course-card {
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--sand-dark);
}
.course-card:first-child { border-top: 1px solid var(--sand-dark); }

.course-meta {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  margin-top: 0.35rem;
}

.tag {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  background: var(--sand);
  color: var(--ink-light);
  padding: 0.2rem 0.65rem;
  border-radius: 20px;
}

.tag.blue {
  background: #EAF2EA;
  color: var(--green-dark);
}

/* EDUCATION */
.edu-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0 1.25rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--sand-dark);
  align-items: start;
}
.edu-item:first-child { border-top: 1px solid var(--sand-dark); }

.edu-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--green-mist);
  margin-top: 0.55rem;
}

.edu-degree {
  font-weight: 500;
  color: var(--ink);
  font-size: 0.95rem;
}

.edu-school {
  font-size: 0.875rem;
  color: var(--ink-muted);
}

/* BUTTON */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.65rem 1.4rem;
  border-radius: 6px;
  font-family: 'Inter', sans-serif;
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  transition: all 0.2s;
  letter-spacing: 0.02em;
}

.btn-primary {
  background: var(--green-deep);
  color: var(--white);
  border: none;
}
.btn-primary:hover { background: var(--green-dark); }

.btn-outline {
  background: transparent;
  color: var(--green-deep);
  border: 1.5px solid var(--green-mist);
}
.btn-outline:hover {
  border-color: var(--green-deep);
  background: var(--sand);
}

/* FOOTER */
footer {
  background: var(--sand);
  border-top: 1px solid var(--dust);
  padding: 2.5rem clamp(1.5rem, 5vw, 4rem);
  margin-top: 4rem;
}

.footer-inner {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-name {
  font-family: 'Lora', serif;
  font-size: 1rem;
  font-weight: 500;
  color: var(--ink);
}

.footer-links {
  display: flex;
  gap: 1.25rem;
}

.footer-links a {
  font-size: 0.85rem;
  color: var(--ink-muted);
  text-decoration: none;
  transition: color 0.2s;
}
.footer-links a:hover { color: var(--green-deep); }

.footer-copy {
  width: 100%;
  font-size: 0.75rem;
  color: var(--ink-muted);
  margin-top: 0.75rem;
}

/* RESPONSIVE */
@media (max-width: 640px) {
  .nav-links { display: none; }
  .hamburger { display: flex; }

  .footer-inner { flex-direction: column; align-items: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; }
}

/* ============================================================
   HOME PAGE
   ============================================================ */
.hero {
  min-height: calc(100svh - var(--nav-height));
  display: grid;
  grid-template-columns: 1fr 1fr;
  max-width: 1100px;
  margin: 0 auto;
  padding: clamp(2rem, 6vw, 5rem) clamp(1.5rem, 5vw, 4rem);
  align-items: center;
  gap: 4rem;
}

.hero-text { max-width: 520px; }

.hero-eyebrow {
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--green-deep);
  margin-bottom: 1.25rem;
}

.hero-name {
  font-family: 'Lora', serif;
  font-size: clamp(2.5rem, 6vw, 3.75rem);
  font-weight: 500;
  color: var(--ink);
  line-height: 1.1;
  margin-bottom: 1.5rem;
}

.hero-name em {
  font-style: italic;
  color: var(--green-deep);
}

.hero-bio {
  font-size: 1.05rem;
  color: var(--ink-light);
  line-height: 1.75;
  margin-bottom: 2rem;
}

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

.hero-image-wrap {
  position: relative;
  display: flex;
  justify-content: center;
}

.hero-image-frame {
  width: 100%;
  max-width: 380px;
  aspect-ratio: 3 / 4;
  border-radius: 4px 40px 4px 40px;
  overflow: hidden;
  background: var(--sand);
  position: relative;
}

.hero-image-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  display: block;
}

.hero-image-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  color: var(--ink-muted);
}

.hero-image-placeholder svg {
  width: 48px;
  height: 48px;
  opacity: 0.4;
}

.hero-image-placeholder span {
  font-size: 0.8rem;
  text-align: center;
  padding: 0 1rem;
  line-height: 1.5;
}

.hero-accent {
  position: absolute;
  bottom: -16px;
  right: -16px;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: var(--sand-dark);
  z-index: -1;
}

.interest-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.5rem;
}

.quick-links {
  background: var(--sand);
  border-top: 1px solid var(--dust);
}

.quick-links-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 3rem clamp(1.5rem, 5vw, 4rem);
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
}

.quick-card {
  background: var(--white);
  border: 1px solid var(--dust);
  border-radius: 8px;
  padding: 1.5rem;
  text-decoration: none;
  transition: border-color 0.2s, transform 0.2s;
  display: block;
}

.quick-card:hover {
  border-color: var(--green-mist);
  transform: translateY(-2px);
}

.quick-card-icon {
  font-size: 1.5rem;
  margin-bottom: 0.75rem;
  color: var(--green-mist);
}

.quick-card h3 {
  font-family: 'Lora', serif;
  font-size: 1rem;
  margin-bottom: 0.4rem;
}

.quick-card p {
  font-size: 0.85rem;
  color: var(--ink-muted);
  margin: 0;
  line-height: 1.5;
}

@media (max-width: 700px) {
  .hero {
    grid-template-columns: 1fr;
    gap: 2.5rem;
    min-height: unset;
    padding-top: 3rem;
  }
  .hero-image-wrap { order: -1; }
  .hero-image-frame { max-width: 280px; }
}

/* ============================================================
   ABOUT PAGE
   ============================================================ */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 4rem;
  align-items: start;
}

.sidebar-photo {
  position: sticky;
  top: calc(var(--nav-height) + 2rem);
}

.photo-frame {
  width: 100%;
  aspect-ratio: 3 / 4;
  border-radius: 4px 32px 4px 32px;
  overflow: hidden;
  background: var(--sand);
  margin-bottom: 1.5rem;
}

.photo-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  display: block;
}

.photo-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  color: var(--ink-muted);
  font-size: 0.8rem;
  text-align: center;
  padding: 1rem;
}

.contact-block {
  background: var(--sand);
  border-radius: 8px;
  padding: 1.25rem;
  border: 1px solid var(--dust);
}

.contact-block h3 {
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--green-mist);
  margin-bottom: 1rem;
  font-family: 'Inter', sans-serif;
}

.contact-item {
  display: flex;
  flex-direction: column;
  margin-bottom: 0.9rem;
}

.contact-item:last-child { margin-bottom: 0; }

.contact-label {
  font-size: 0.75rem;
  color: var(--ink-muted);
  margin-bottom: 0.15rem;
}

.contact-value {
  font-size: 0.875rem;
  color: var(--ink-light);
}

.contact-value a {
  color: var(--green-deep);
  text-decoration: none;
}
.contact-value a:hover { text-decoration: underline; }

.social-links {
  display: flex;
  gap: 0.75rem;
  margin-top: 1rem;
}

.social-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
  color: var(--ink-muted);
  text-decoration: none;
  border: 1px solid var(--dust);
  border-radius: 4px;
  padding: 0.35rem 0.75rem;
  background: var(--white);
  transition: all 0.2s;
}
.social-link:hover {
  color: var(--green-deep);
  border-color: var(--green-mist);
}

.fields-of-study {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.75rem;
}

@media (max-width: 800px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  .sidebar-photo {
    position: static;
    max-width: 320px;
  }
  .sidebar-photo .photo-frame {
    aspect-ratio: 1 / 1;
  }
}

/* ============================================================
   RESEARCH PAGE
   ============================================================ */
.research-focus {
  background: var(--sand);
  border-radius: 8px;
  padding: 1.75rem 2rem;
  border-left: 3px solid var(--green-deep);
  margin-bottom: 2.5rem;
}

.research-focus p {
  font-family: 'Lora', serif;
  font-size: 1.05rem;
  font-style: italic;
  color: var(--ink);
  line-height: 1.75;
  margin: 0;
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.25rem;
  margin-top: 1rem;
}

.project-card {
  background: var(--sand);
  border-radius: 8px;
  padding: 1.5rem;
  border: 1px solid var(--dust);
}

.project-card h3 {
  font-size: 0.95rem;
  margin-bottom: 0.5rem;
  line-height: 1.35;
}

.project-card p {
  font-size: 0.85rem;
  color: var(--ink-muted);
  margin: 0;
  line-height: 1.55;
}

.project-tag {
  display: inline-block;
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--green-dark);
  background: #E8F0F7;
  padding: 0.15rem 0.55rem;
  border-radius: 20px;
  margin-bottom: 0.75rem;
}

/* ============================================================
   TEACHING PAGE
   ============================================================ */
.teaching-philosophy {
  background: var(--sand);
  border-radius: 8px;
  padding: 1.75rem 2rem;
  border-left: 3px solid var(--green-deep);
  margin-bottom: 2.5rem;
}

.teaching-philosophy p {
  font-family: 'Lora', serif;
  font-size: 1.05rem;
  font-style: italic;
  color: var(--ink);
  line-height: 1.75;
  margin: 0;
}

.course-role {
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--green-deep);
  margin-bottom: 0.2rem;
}

.course-title {
  font-family: 'Lora', serif;
  font-size: 1rem;
  font-weight: 500;
  color: var(--ink);
  margin-bottom: 0.4rem;
}

.course-desc {
  font-size: 0.875rem;
  color: var(--ink-muted);
  line-height: 1.6;
}

.expertise-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-top: 1rem;
}

.expertise-item {
  padding: 1.1rem 1.25rem;
  background: var(--sand);
  border-radius: 6px;
  border: 1px solid var(--dust);
}

.expertise-item h3 {
  font-size: 0.9rem;
  margin-bottom: 0.25rem;
}

.expertise-item p {
  font-size: 0.8rem;
  color: var(--ink-muted);
  margin: 0;
  line-height: 1.5;
}

.note-box {
  background: #EEF4F9;
  border-radius: 6px;
  padding: 1.1rem 1.4rem;
  margin-top: 2rem;
}

.note-box p {
  font-size: 0.875rem;
  color: var(--green-dark);
  margin: 0;
}

.note-box a { color: var(--green-deep); }

/* ============================================================
   CV PAGE
   ============================================================ */
.cv-download-block {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  background: var(--sand);
  border-radius: 8px;
  padding: 1.75rem 2rem;
  border: 1px solid var(--dust);
  margin-bottom: 2.5rem;
  flex-wrap: wrap;
}

.cv-download-text h2 {
  font-size: 1.15rem;
  margin-bottom: 0.3rem;
}

.cv-download-text p {
  font-size: 0.875rem;
  color: var(--ink-muted);
  margin: 0;
}

.cv-section {
  margin-bottom: 2.5rem;
}

.cv-section-title {
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--green-mist);
  margin-bottom: 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--sand-dark);
}

.cv-entry {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 0 1.5rem;
  padding: 0.85rem 0;
  border-bottom: 1px solid var(--sand-dark);
}

.cv-entry:first-of-type { border-top: 1px solid var(--sand-dark); }

.cv-year {
  font-size: 0.8rem;
  color: var(--ink-muted);
  padding-top: 0.1rem;
  line-height: 1.4;
}

.cv-content h3 {
  font-size: 0.95rem;
  margin-bottom: 0.2rem;
  font-family: 'Inter', sans-serif;
  font-weight: 500;
}

.cv-content p {
  font-size: 0.85rem;
  color: var(--ink-muted);
  margin: 0;
}

.cv-content .cv-detail {
  font-size: 0.82rem;
  color: var(--ink-muted);
  font-style: italic;
  margin-top: 0.2rem;
}

@media (max-width: 560px) {
  .cv-entry {
    grid-template-columns: 1fr;
    gap: 0.2rem;
  }
  .cv-year {
    font-size: 0.75rem;
    color: var(--green-mist);
  }
}