/* ===== DESIGN TOKENS ===== */
:root {
  --bg-primary: #faf8f5;
  --bg-secondary: #f2efe9;
  --bg-card: #ffffff;
  --bg-card-hover: #fdfcfa;
  --border: #e4dfd6;
  --border-hover: #cfc8bb;
  --text-primary: #1a1a2e;
  --text-secondary: #4a4a5a;
  --text-muted: #8a8a96;
  --accent: #8b6f47;
  --accent-dim: rgba(139, 111, 71, 0.08);
  --accent-hover: #a0824f;
  --accent-light: rgba(139, 111, 71, 0.12);
  --navy: #1a1a2e;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-serif: 'Playfair Display', Georgia, serif;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --radius: 8px;
  --radius-lg: 12px;
  --max-width: 1100px;
  --shadow-sm: 0 1px 3px rgba(26, 26, 46, 0.04);
  --shadow-md: 0 4px 16px rgba(26, 26, 46, 0.06);
  --shadow-lg: 0 8px 30px rgba(26, 26, 46, 0.08);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.5;
  overflow-x: hidden;
}

p,
li,
.about-text {
  text-align: justify;
}

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

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

img {
  max-width: 100%;
  display: block;
}

::selection {
  background: var(--accent);
  color: #fff;
}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar {
  width: 6px;
}

::-webkit-scrollbar-track {
  background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
  background: #ccc;
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: #aaa;
}

/* ===== NAVIGATION ===== */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 0 2rem;
  background: rgba(250, 248, 245, 0.9);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.nav.scrolled {
  border-bottom-color: var(--border);
  box-shadow: var(--shadow-sm);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.nav-logo {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--navy);
  letter-spacing: -0.02em;
}

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

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

.nav-links a {
  color: var(--text-muted);
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  position: relative;
  padding-bottom: 2px;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 1.5px;
  background: var(--accent);
  transition: width var(--transition);
}

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

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

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--navy);
  margin: 5px 0;
  transition: var(--transition);
}

/* ===== HERO ===== */
.hero {
  display: flex;
  align-items: center;
  padding: 4rem 2rem 0;
  position: relative;
  background: linear-gradient(170deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 45%;
  height: 100%;
  background: radial-gradient(ellipse at 70% 40%, rgba(139, 111, 71, 0.05) 0%, transparent 60%);
  pointer-events: none;
}

.hero-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  width: 100%;
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 4rem;
  align-items: center;
}

.hero-content {
  position: relative;
  z-index: 1;
}

.hero-label {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.75rem;
  opacity: 0;
  animation: fadeUp 0.6s 0.2s forwards;
}

.hero-label::before {
  content: '';
  width: 24px;
  height: 1.5px;
  background: var(--accent);
}

.hero-title {
  font-family: var(--font-serif);
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.03em;
  color: var(--navy);
  margin-bottom: 0.5rem;
  opacity: 0;
  animation: fadeUp 0.6s 0.35s forwards;
}

.hero-subtitle {
  font-size: 1.02rem;
  color: var(--text-secondary);
  line-height: 1.8;
  max-width: 540px;
  margin-bottom: 1.5rem;
  opacity: 0;
  animation: fadeUp 0.6s 0.5s forwards;
}

.hero-meta {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
  opacity: 0;
  animation: fadeUp 0.6s 0.65s forwards;
}

.hero-meta-item {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.hero-meta-label {
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
}

.hero-meta-value {
  font-size: 0.88rem;
  color: var(--navy);
  font-weight: 600;
}

.hero-photo {
  position: relative;
  opacity: 0;
  animation: fadeUp 0.6s 0.4s forwards;
}

.hero-photo img {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  filter: saturate(0.9);
  transition: filter var(--transition);
}

.hero-photo:hover img {
  filter: saturate(1);
}

.hero-photo::after {
  content: '';
  position: absolute;
  inset: 8px -8px -8px 8px;
  border: 1.5px solid var(--accent);
  border-radius: var(--radius-lg);
  opacity: 0.25;
  z-index: -1;
}

/* ===== SECTIONS ===== */
.section {
  padding: 3rem 2rem;
  position: relative;
}

.section-inner {
  max-width: var(--max-width);
  margin: 0 auto;
}

.section-header {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.section-number {
  font-family: var(--font-serif);
  font-size: 0.85rem;
  color: var(--accent);
  font-weight: 600;
}

.section-title {
  font-family: var(--font-serif);
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--navy);
}

.section-line {
  flex: 1;
  height: 1px;
  background: var(--border);
  margin-left: 1rem;
}

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

/* ===== ABOUT ===== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
}

.about-text {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.about-text p {
  margin-bottom: 1.2rem;
}

.about-text strong {
  color: var(--navy);
  font-weight: 600;
}

.about-details {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.detail-card {
  padding: 1.25rem 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.detail-card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-md);
}

.detail-card-label {
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 0.35rem;
}

.detail-card-value {
  font-size: 0.95rem;
  color: var(--navy);
  font-weight: 600;
}

.detail-card-sub {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 0.15rem;
}

/* ===== EXPERIENCE TIMELINE ===== */
.timeline {
  position: relative;
  padding-left: 2rem;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 1px;
  background: var(--border);
}

.timeline-item {
  position: relative;
  padding-bottom: 2.5rem;
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -2rem;
  top: 6px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--bg-primary);
  border: 2px solid var(--accent);
  transform: translateX(-4px);
}

.timeline-period {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 0.4rem;
}

.timeline-role {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--navy);
  margin-bottom: 0.2rem;
}

.timeline-company {
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin-bottom: 0.8rem;
}

.timeline-desc {
  font-size: 0.86rem;
  color: var(--text-muted);
  line-height: 1.7;
}

.timeline-desc li {
  margin-bottom: 0.4rem;
  list-style: none;
  padding-left: 1rem;
  position: relative;
}

.timeline-desc li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-size: 0.75rem;
}

/* ===== PROJECTS ===== */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 1.5rem;
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow-sm);
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  display: flex;
  flex-direction: column;
}

.project-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.project-card-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.project-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius);
  background: var(--accent-dim);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
}

.project-tag {
  display: inline-block;
  font-size: 0.63rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  background: var(--accent-dim);
  padding: 0.2rem 0.6rem;
  border-radius: 4px;
  margin-bottom: 0.75rem;
}

.project-card h3 {
  font-size: 1.08rem;
  font-weight: 600;
  margin-bottom: 0.6rem;
  color: var(--navy);
}

.project-card p {
  font-size: 0.84rem;
  color: var(--text-secondary);
  line-height: 1.7;
  flex: 1;
}

.project-tech {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border);
}

.project-tech span {
  font-size: 0.72rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* ===== PUBLICATIONS ===== */
.pub-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}

.pub-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow-sm);
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.pub-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.pub-type {
  font-size: 0.63rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

.pub-card h3 {
  font-size: 1.05rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  line-height: 1.4;
  color: var(--navy);
}

.pub-card p {
  font-size: 0.84rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

.pub-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin-top: 1rem;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--accent);
}

.pub-link:hover {
  gap: 0.6rem;
}

/* ===== EDUCATION / COURSEWORK ===== */
.edu-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2.5rem;
}

.edu-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  box-shadow: var(--shadow-sm);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.edu-card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-md);
}

.edu-degree {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--navy);
  margin-bottom: 0.25rem;
}

.edu-school {
  font-size: 0.88rem;
  color: var(--text-secondary);
  margin-bottom: 0.15rem;
}

.edu-meta {
  font-size: 0.78rem;
  color: var(--accent);
  font-weight: 600;
  margin-bottom: 1rem;
}

.coursework-title {
  font-size: 0.68rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 0.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

.coursework-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
}

.coursework-tag {
  font-size: 0.73rem;
  padding: 0.25rem 0.65rem;
  background: var(--accent-dim);
  border: 1px solid transparent;
  border-radius: 100px;
  color: var(--text-secondary);
  transition: border-color var(--transition), color var(--transition);
}

.coursework-tag:hover {
  border-color: var(--accent);
  color: var(--navy);
}

/* ===== CERTIFICATIONS ===== */
.certs-container {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1rem;
}

.cert-group-title {
  grid-column: 1 / -1;
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
  margin-top: 1rem;
}

.cert-group-title:first-child {
  margin-top: 0;
}

.cert-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  padding: 1rem 1.25rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.cert-item:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-md);
}

.cert-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  margin-top: 7px;
  flex-shrink: 0;
}

.cert-name {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--navy);
}

.cert-source {
  font-size: 0.73rem;
  color: var(--text-muted);
  margin-top: 0.15rem;
}

/* ===== SKILLS ===== */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 1.5rem;
}

.skill-group h3 {
  font-size: 0.72rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border);
}

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

.skill-tag {
  margin-right: 0.5rem;
  margin-bottom: 0.5rem;
  display: inline-block;
  font-size: 0.8rem;
  padding: 0.35rem 0.85rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 100px;
  color: var(--text-secondary);
  box-shadow: var(--shadow-sm);
  transition: border-color var(--transition), color var(--transition), box-shadow var(--transition);
}

.skill-tag:hover {
  border-color: var(--accent);
  color: var(--navy);
  box-shadow: var(--shadow-md);
}

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

.connect-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1.25rem 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  color: var(--navy);
}

.connect-link:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  color: var(--navy);
}

.connect-icon {
  font-size: 1.1rem;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius);
  background: var(--accent-dim);
  color: var(--accent);
  flex-shrink: 0;
  font-weight: 700;
}

.connect-label {
  font-size: 0.85rem;
  font-weight: 600;
}

.connect-sub {
  font-size: 0.72rem;
  color: var(--text-muted);
}

/* ===== FOOTER ===== */
.footer {
  padding: 2.5rem 2rem;
  border-top: 1px solid var(--border);
  text-align: center;
  background: var(--bg-secondary);
}

.footer-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.footer-links a {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition);
}

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

.footer-links span {
  font-size: 0.7rem;
  color: var(--border-hover);
}

.footer p {
  font-size: 0.78rem;
  color: var(--text-muted);
}

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

/* ===== ANIMATIONS ===== */
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .hero-photo {
    max-width: 220px;
    order: -1;
  }

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

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

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

  .certs-container {
    grid-template-columns: 1fr;
  }

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

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

  .nav-links {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: rgba(250, 248, 245, 0.97);
    backdrop-filter: blur(20px);
    flex-direction: column;
    padding: 1.5rem 2rem;
    gap: 1rem;
    border-bottom: 1px solid var(--border);
  }

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

  .nav-toggle {
    display: block;
  }

  .hero-meta {
    gap: 1.5rem;
  }

  .section {
    padding: 3.5rem 1.25rem;
  }
}

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

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