:root {
  --bg: #071a18;
  --bg-elev: #0d2a26;
  --bg-soft: #123b35;
  --panel: rgba(12, 31, 28, 0.82);
  --panel-strong: rgba(16, 39, 34, 0.96);
  --text: #edfdf7;
  --muted: #bcdccf;
  --accent: #7ce7c2;
  --accent-strong: #58bca2;
  --border: rgba(176, 255, 224, 0.12);
  --shadow: 0 30px 60px rgba(3, 11, 10, 0.42);
  --hero-glow: rgba(124, 231, 194, 0.22);
  --gradient: linear-gradient(135deg, rgba(124, 231, 194, 0.14), rgba(88, 188, 162, 0.1));
  --card-shadow: 0 16px 30px rgba(2, 10, 9, 0.2);
  --section-alt: rgba(10, 26, 23, 0.9);
  --success: #9ce8b9;
  color-scheme: dark;
}

:root[data-theme="light"] {
  --bg: #edf9f4;
  --bg-elev: #ffffff;
  --bg-soft: #e4f5ed;
  --panel: rgba(255, 255, 255, 0.8);
  --panel-strong: rgba(255, 255, 255, 0.96);
  --text: #102c27;
  --muted: #496a63;
  --accent: #1f7b5f;
  --accent-strong: #2f9b7d;
  --border: rgba(16, 44, 39, 0.08);
  --shadow: 0 20px 50px rgba(29, 76, 66, 0.12);
  --hero-glow: rgba(31, 123, 95, 0.12);
  --gradient: linear-gradient(135deg, rgba(31, 123, 95, 0.08), rgba(47, 155, 125, 0.08));
  --card-shadow: 0 12px 28px rgba(17, 54, 47, 0.1);
  --section-alt: rgba(234, 246, 240, 0.95);
  --success: #1d855f;
  color-scheme: light;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Inter", sans-serif;
  background:
    radial-gradient(circle at top left, var(--hero-glow), transparent 30%),
    var(--bg);
  color: var(--text);
  line-height: 1.6;
  transition: background 0.3s ease, color 0.3s ease;
}

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

button,
a {
  transition: all 0.25s ease;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
}

.container {
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto;
}

.narrow {
  width: min(760px, calc(100% - 2rem));
}

.section {
  padding: 6rem 0;
}

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

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

.eyebrow {
  margin: 0 0 0.65rem;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.72rem;
  font-weight: 700;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  font-size: clamp(2.8rem, 4vw, 5rem);
  line-height: 0.96;
  letter-spacing: -0.06em;
  margin-bottom: 1rem;
}

.hero-greeting {
  margin: 0 0 0.7rem;
  font-size: 0.82rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
}

.name-highlight {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-strong) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

h2 {
  font-size: clamp(2rem, 3vw, 3rem);
  line-height: 1.1;
  letter-spacing: -0.05em;
  margin-bottom: 0;
}

h3 {
  font-size: 1.15rem;
  line-height: 1.35;
  margin-bottom: 0.6rem;
}

p {
  color: var(--muted);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  backdrop-filter: blur(18px);
  background: rgba(9, 13, 18, 0.7);
  border-bottom: 1px solid var(--border);
}

:root[data-theme="light"] .site-header {
  background: rgba(243, 247, 251, 0.82);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  min-height: 74px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  font-weight: 700;
  letter-spacing: -0.04em;
}

.brand-logo {
  width: 2.5rem;
  height: 2.5rem;
  object-fit: contain;
  filter: drop-shadow(0 0 0.6rem rgba(124, 201, 255, 0.18));
}

.brand-name {
  font-size: 0.96rem;
}

.brand-name span {
  color: var(--accent);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.site-nav a {
  position: relative;
  color: var(--muted);
  font-size: 0.95rem;
  padding: 0.45rem 0.2rem;
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.2rem;
  width: 100%;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s ease;
}

.site-nav a:hover,
.site-nav a.active {
  color: var(--text);
}

.site-nav a:hover::after,
.site-nav a.active::after {
  transform: scaleX(1);
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.65rem 0.95rem;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: transparent;
  color: var(--text);
  cursor: pointer;
}

.theme-toggle:hover {
  border-color: rgba(124, 201, 255, 0.4);
  transform: translateY(-1px);
}

.theme-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
}

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

.nav-toggle {
  display: none;
  width: 2.7rem;
  height: 2.7rem;
  border-radius: 0.8rem;
  border: 1px solid var(--border);
  background: transparent;
  padding: 0.55rem;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--text);
  border-radius: 999px;
  margin: 0.3rem 0;
}

.hero {
  padding-top: 4.5rem;
  padding-bottom: 4rem;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  align-items: center;
  gap: 2.8rem;
}

.subtitle {
  max-width: 35rem;
  font-size: 1.1rem;
  margin-bottom: 2rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.9rem 1.4rem;
  border-radius: 999px;
  font-weight: 600;
  letter-spacing: -0.02em;
  border: 1px solid transparent;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  color: #08131b;
  box-shadow: var(--shadow);
}

.btn-secondary {
  border-color: var(--border);
  background: transparent;
  color: var(--text);
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  align-items: center;
  color: var(--muted);
  font-size: 0.92rem;
}

.hero-meta a {
  color: var(--text);
}

.hero-visual {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 26rem;
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(12px);
  opacity: 0.85;
}

.orb-1 {
  width: 18rem;
  height: 18rem;
  background: linear-gradient(135deg, rgba(124, 201, 255, 0.35), rgba(124, 201, 255, 0));
  right: 0;
  top: 2rem;
}

.orb-2 {
  width: 14rem;
  height: 14rem;
  background: linear-gradient(135deg, rgba(139, 125, 255, 0.38), rgba(139, 125, 255, 0));
  left: 1rem;
  bottom: 1rem;
}

.minimalist-visual {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 18rem;
}

.mini-identity {
  position: relative;
  z-index: 1;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.8rem;
  padding: 0.9rem 1.1rem;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(124, 201, 255, 0.04);
  backdrop-filter: blur(4px);
}

.mini-identity span {
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.about-panel,
.research-panel,
.contact-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 1.4rem;
  box-shadow: var(--card-shadow);
}

.about-panel {
  padding: 2rem;
}

.about-panel p + p {
  margin-top: 1.1rem;
}

.timeline {
  position: relative;
  display: grid;
  gap: 1.5rem;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 0.72rem;
  top: 0.2rem;
  bottom: 0.2rem;
  width: 2px;
  background: var(--border);
}

.timeline-item {
  position: relative;
  display: grid;
  grid-template-columns: 2rem minmax(0, 1fr);
  gap: 1.2rem;
  align-items: start;
}

.timeline-mark {
  width: 1.5rem;
  height: 1.5rem;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent), var(--accent-strong));
  border: 4px solid var(--bg);
  box-shadow: 0 0 0 4px rgba(124, 201, 255, 0.15);
  margin-top: 0.6rem;
  position: relative;
  z-index: 1;
}

.timeline-content {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 1.1rem;
  padding: 1.3rem 1.4rem;
  box-shadow: var(--card-shadow);
}

.timeline-date,
.item-label,
.project-type,
.project-status {
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  font-weight: 700;
}

.institution {
  margin: 0.25rem 0 0;
  color: var(--muted);
  font-weight: 600;
}

.skills-grid,
.project-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.25rem;
}

.skill-card,
.project-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: 1.2rem;
  box-shadow: var(--card-shadow);
}

.skill-card {
  padding: 1.5rem;
}

.tag-group {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}

.tag-group span {
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 0.55rem 0.7rem;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--muted);
  font-size: 0.8rem;
}

.project-card {
  padding: 1.5rem;
}

.project-card.featured {
  grid-column: span 2;
  background:
    linear-gradient(135deg, rgba(124, 201, 255, 0.04), rgba(139, 125, 255, 0.06)),
    var(--panel);
}

.project-topline {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 0.8rem;
  margin-bottom: 0.8rem;
}

.project-status {
  color: var(--success);
}

.research-panel {
  display: grid;
  gap: 1rem;
  padding: 1.75rem;
}

.research-item {
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}

.research-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.abstract-toggle {
  margin: 0.5rem 0 1rem;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  border-radius: 999px;
  padding: 0.7rem 1rem;
  cursor: pointer;
}

.abstract-toggle:hover {
  border-color: rgba(124, 201, 255, 0.4);
}

.modal {
  position: fixed;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 2000;
}

.modal.open {
  display: flex;
}

.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(4, 7, 11, 0.7);
  backdrop-filter: blur(6px);
}

.modal-dialog {
  position: relative;
  z-index: 1;
  width: min(720px, calc(100% - 2rem));
  max-height: 80vh;
  overflow: auto;
  background: var(--panel-strong);
  border: 1px solid var(--border);
  border-radius: 1.25rem;
  padding: 1.5rem 1.25rem 1.25rem;
  box-shadow: var(--shadow);
}

.modal-close {
  position: absolute;
  top: 0.8rem;
  right: 0.8rem;
  width: 2.1rem;
  height: 2.1rem;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
}

.modal-body {
  margin-top: 0.5rem;
}

.modal-body p {
  margin: 0 0 1rem;
  color: var(--text);
}

.contact-card {
  display: grid;
  gap: 1rem;
  padding: 1.7rem 1.5rem;
}

.contact-message {
  margin: 0;
  font-size: 1rem;
  color: var(--muted);
}

.contact-tags {
  margin: 0.25rem 0 0.3rem;
}

.email-toggle {
  justify-self: start;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  border-radius: 999px;
  padding: 0.8rem 1.1rem;
  cursor: pointer;
}

.email-toggle:hover {
  border-color: rgba(124, 201, 255, 0.4);
}

.contact-email {
  display: none;
  align-items: center;
  justify-content: center;
  width: fit-content;
  min-height: 3rem;
  padding: 0.8rem 1.1rem;
  border-radius: 999px;
  background: linear-gradient(135deg, rgba(124, 201, 255, 0.14), rgba(139, 125, 255, 0.08));
  border: 1px solid rgba(124, 201, 255, 0.24);
  color: var(--text);
  font-weight: 600;
}

.contact-email.visible {
  display: inline-flex;
}

.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.2rem 0;
}

.footer-wrap {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.site-footer p {
  margin: 0;
  color: var(--muted);
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}

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

@media (max-width: 900px) {
  .hero-grid,
  .skills-grid,
  .project-grid {
    grid-template-columns: 1fr 1fr;
  }

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

  .profile-card {
    width: min(22rem, 100%);
  }

  .project-card.featured {
    grid-column: span 2;
  }
}

@media (max-width: 720px) {
  .nav-toggle {
    display: block;
  }

  .site-nav {
    position: absolute;
    top: calc(100% + 0.6rem);
    right: 1rem;
    left: 1rem;
    display: none;
    flex-direction: column;
    align-items: flex-start;
    padding: 1rem;
    border: 1px solid var(--border);
    border-radius: 1rem;
    background: var(--panel-strong);
    box-shadow: var(--shadow);
  }

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

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

  .project-card.featured {
    grid-column: span 1;
  }

  .hero {
    padding-top: 3.25rem;
  }

  .hero-visual {
    min-height: 20rem;
  }

  .contact-row {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}