:root {
  --bg: #000000;
  --panel: rgba(255, 255, 255, 0.045);
  --line: rgba(255, 255, 255, 0.09);
  --text: #f5f7fa;
  --muted: #a6b0bd;
  --muted-2: #7d8896;
  --accent: #89b7ff;
  --accent-soft: rgba(137, 183, 255, 0.16);
  --max: 1180px;
  --radius: 26px;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.34);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text",
    "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  line-height: 1.6;
  background:
    radial-gradient(circle at 18% 0%, rgba(137, 183, 255, 0.10), transparent 24%),
    radial-gradient(circle at 88% 82%, rgba(137, 183, 255, 0.08), transparent 22%),
    linear-gradient(180deg, #030508 0%, #000000 100%);
}

body.loaded .hero-kicker,
body.loaded .hero h1,
body.loaded .hero-title,
body.loaded .hero-subtext,
body.loaded .hero-actions,
body.loaded .page-circuit-bg {
  opacity: 1;
  transform: translateY(0);
}

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

.page-circuit-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0;
  transform: translateY(20px);
  transition:
    opacity 1s ease,
    transform 1s cubic-bezier(0.22, 1, 0.36, 1);
  will-change: transform;
}

.page-circuit-svg {
  width: 100%;
  height: 100%;
  display: block;
}

.bg-trace {
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.bg-trace.base {
  stroke: rgba(137, 183, 255, 0.08);
  stroke-width: 4;
}

.bg-trace.active {
  stroke: rgba(137, 183, 255, 0.28);
  stroke-width: 4;
  stroke-dasharray: 90 700;
  stroke-dashoffset: 790;
  animation: bgSignalTravel 8.5s linear infinite;
}

.bg-trace.delay-1 { animation-delay: 0s; }
.bg-trace.delay-2 { animation-delay: 1.2s; }
.bg-trace.delay-3 { animation-delay: 2.2s; }
.bg-trace.delay-4 { animation-delay: 3.1s; }
.bg-trace.delay-5 { animation-delay: 4s; }
.bg-trace.delay-6 { animation-delay: 4.9s; }
.bg-trace.delay-7 { animation-delay: 5.8s; }
.bg-trace.delay-8 { animation-delay: 6.7s; }

.bg-node {
  fill: rgba(137, 183, 255, 0.34);
  filter: drop-shadow(0 0 9px rgba(137, 183, 255, 0.14));
}

.pulse-1 { animation: bgNodePulse 3.2s ease-in-out infinite; }
.pulse-2 { animation: bgNodePulse 3.2s ease-in-out 0.25s infinite; }
.pulse-3 { animation: bgNodePulse 3.2s ease-in-out 0.5s infinite; }
.pulse-4 { animation: bgNodePulse 3.2s ease-in-out 0.75s infinite; }
.pulse-5 { animation: bgNodePulse 3.2s ease-in-out 1s infinite; }
.pulse-6 { animation: bgNodePulse 3.2s ease-in-out 1.25s infinite; }
.pulse-7 { animation: bgNodePulse 3.2s ease-in-out 1.5s infinite; }
.pulse-8 { animation: bgNodePulse 3.2s ease-in-out 1.75s infinite; }
.pulse-9 { animation: bgNodePulse 3.2s ease-in-out 2s infinite; }
.pulse-10 { animation: bgNodePulse 3.2s ease-in-out 2.25s infinite; }
.pulse-11 { animation: bgNodePulse 3.2s ease-in-out 2.5s infinite; }
.pulse-12 { animation: bgNodePulse 3.2s ease-in-out 2.75s infinite; }
.pulse-13 { animation: bgNodePulse 3.2s ease-in-out 3s infinite; }
.pulse-14 { animation: bgNodePulse 3.2s ease-in-out 3.25s infinite; }
.pulse-15 { animation: bgNodePulse 3.2s ease-in-out 3.5s infinite; }
.pulse-16 { animation: bgNodePulse 3.2s ease-in-out 3.75s infinite; }
.pulse-17 { animation: bgNodePulse 3.2s ease-in-out 4s infinite; }
.pulse-18 { animation: bgNodePulse 3.2s ease-in-out 4.25s infinite; }
.pulse-19 { animation: bgNodePulse 3.2s ease-in-out 4.5s infinite; }
.pulse-20 { animation: bgNodePulse 3.2s ease-in-out 4.75s infinite; }
.pulse-21 { animation: bgNodePulse 3.2s ease-in-out 5s infinite; }
.pulse-22 { animation: bgNodePulse 3.2s ease-in-out 5.25s infinite; }
.pulse-23 { animation: bgNodePulse 3.2s ease-in-out 5.5s infinite; }
.pulse-24 { animation: bgNodePulse 3.2s ease-in-out 5.75s infinite; }

.signal-dot {
  fill: rgba(232, 242, 255, 0.88);
  opacity: 0.9;
}

.dot-1,
.dot-2,
.dot-3,
.dot-4 {
  filter: drop-shadow(0 0 14px rgba(137, 183, 255, 0.42));
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 1100;
  backdrop-filter: blur(18px);
  background: rgba(0, 0, 0, 0.58);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.nav {
  max-width: var(--max);
  margin: 0 auto;
  padding: 1rem 1.4rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  font-size: 0.98rem;
  font-weight: 600;
  letter-spacing: 0.08em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.2rem;
}

.nav-links a {
  font-size: 0.92rem;
  color: var(--muted);
  transition: color 0.2s ease, transform 0.2s ease;
}

.nav-links a:hover {
  color: var(--text);
  transform: translateY(-1px);
}

.menu-toggle {
  display: none;
  width: 46px;
  height: 46px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
}

.menu-toggle span {
  width: 18px;
  height: 2px;
  background: var(--text);
  border-radius: 999px;
  display: block;
}

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  z-index: 1;
}

.hero-inner {
  max-width: var(--max);
  margin: 0 auto;
  padding: 7.6rem 1.4rem 5.8rem;
  width: 100%;
  position: relative;
  z-index: 2;
}

.hero-kicker,
.hero h1,
.hero-title,
.hero-subtext,
.hero-actions {
  opacity: 0;
  transform: translateY(26px);
  transition:
    opacity 0.9s ease,
    transform 0.9s cubic-bezier(0.22, 1, 0.36, 1);
}

.hero-kicker { transition-delay: 220ms; }
.hero h1 { transition-delay: 340ms; }
.hero-title { transition-delay: 460ms; }
.hero-subtext { transition-delay: 580ms; }
.hero-actions { transition-delay: 700ms; }

.hero-kicker {
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.78rem;
  margin-bottom: 1.25rem;
}

.hero h1 {
  margin: 0;
  max-width: 920px;
  font-size: clamp(3.35rem, 9vw, 7.35rem);
  line-height: 0.94;
  letter-spacing: -0.055em;
}

.hero-title {
  margin-top: 1.25rem;
  max-width: 760px;
  font-size: clamp(1.15rem, 2vw, 1.62rem);
  color: #dbe4ef;
}

.hero-subtext {
  margin-top: 1.45rem;
  max-width: 720px;
  color: var(--muted);
  font-size: 1.06rem;
}

.hero-actions {
  margin-top: 2.15rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
}

.hero-glow {
  position: absolute;
  right: -6%;
  bottom: -14%;
  width: 560px;
  height: 560px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(137, 183, 255, 0.18), transparent 62%);
  filter: blur(22px);
  pointer-events: none;
  transition: transform 0.5s ease;
  will-change: transform;
  animation: ambientFloat 9s ease-in-out infinite;
  z-index: 0;
}

.hero-grid {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: linear-gradient(to bottom, rgba(255,255,255,0.18), transparent 80%);
  opacity: 0.14;
  transition: transform 0.5s ease;
  will-change: transform;
  z-index: 0;
}

.section {
  padding: 1.8rem 0 6.6rem;
  position: relative;
  z-index: 1;
}

.section-shell {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 1.4rem;
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 1.85rem;
}

.section-label-wrap {
  position: relative;
  display: flex;
  align-items: center;
  min-height: 28px;
  padding-left: 1.5rem;
  transition: transform 0.25s ease;
}

.section-connector {
  position: absolute;
  left: 0;
  top: 50%;
  width: 18px;
  height: 2px;
  background: rgba(137, 183, 255, 0.12);
  transform: translateY(-50%);
  transition: background 0.25s ease, box-shadow 0.25s ease, width 0.25s ease;
}

.section-node {
  position: absolute;
  left: 18px;
  top: 50%;
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: rgba(137, 183, 255, 0.24);
  transform: translate(-50%, -50%);
  transition: background 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
}

.section-label {
  color: var(--muted-2);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  transition: color 0.25s ease, transform 0.25s ease;
}

.section-label-wrap.is-active .section-connector {
  width: 28px;
  background: rgba(137, 183, 255, 0.55);
  box-shadow: 0 0 14px rgba(137, 183, 255, 0.18);
}

.section-label-wrap.is-active .section-node {
  background: rgba(137, 183, 255, 0.95);
  box-shadow: 0 0 16px rgba(137, 183, 255, 0.34);
  transform: translate(-50%, -50%) scale(1.2);
}

.section-label-wrap.is-active .section-label {
  color: rgba(232, 242, 255, 0.98);
  transform: translateX(2px);
}

.section-content h2 {
  margin: 0 0 1rem;
  font-size: clamp(2rem, 4vw, 3.7rem);
  line-height: 1.03;
  letter-spacing: -0.045em;
}

.section-content p {
  color: var(--muted);
  font-size: 1.03rem;
  max-width: 860px;
}

.narrow {
  max-width: 790px;
}

.info-card,
.project-card {
  background:
    linear-gradient(180deg, rgba(255,255,255,0.042), rgba(255,255,255,0.028));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.65rem;
  box-shadow: var(--shadow);
  transition:
    transform 0.35s ease,
    border-color 0.35s ease,
    box-shadow 0.35s ease,
    background 0.35s ease;
  transform-style: preserve-3d;
  will-change: transform;
}

.info-card:hover,
.project-card:hover {
  border-color: rgba(137, 183, 255, 0.22);
  box-shadow: 0 28px 90px rgba(0, 0, 0, 0.42);
}

.card-topline {
  color: var(--accent);
  font-size: 0.86rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  margin-bottom: 0.56rem;
}

.card-title {
  font-size: 1.48rem;
  font-weight: 600;
  letter-spacing: -0.03em;
  margin-bottom: 0.35rem;
}

.card-meta {
  color: var(--muted-2);
  font-size: 0.95rem;
  margin-bottom: 1rem;
}

.muted-line {
  color: #d5dfeb !important;
}

.coursework-block {
  margin-top: 1.35rem;
  padding-top: 1.1rem;
  border-top: 1px solid var(--line);
}

.coursework-block h3 {
  margin: 0 0 0.85rem;
  font-size: 1rem;
}

.course-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.72rem;
}

.course-tags span {
  border: 1px solid var(--line);
  background: rgba(255,255,255,0.03);
  color: #dce5ef;
  padding: 0.72rem 0.95rem;
  border-radius: 999px;
  font-size: 0.93rem;
  transition: transform 0.25s ease, border-color 0.25s ease, background 0.25s ease;
}

.course-tags span:hover {
  transform: translateY(-2px);
  border-color: rgba(137, 183, 255, 0.25);
  background: rgba(255,255,255,0.05);
}

.project-intro {
  margin-top: 0;
  margin-bottom: 1.3rem;
  font-size: 1.05rem;
}

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

.mini-card,
.project-detail-block {
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 1.15rem;
  background: rgba(255, 255, 255, 0.03);
  transition:
    transform 0.35s ease,
    border-color 0.35s ease,
    box-shadow 0.35s ease,
    background 0.35s ease;
  transform-style: preserve-3d;
  will-change: transform;
}

.mini-card:hover,
.project-detail-block:hover {
  border-color: rgba(137, 183, 255, 0.22);
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.26);
  background: rgba(255, 255, 255, 0.045);
}

.mini-card h3,
.project-detail-block h3 {
  margin: 0 0 0.6rem;
  font-size: 1rem;
}

.mini-card p,
.project-detail-block p {
  margin: 0;
  color: var(--muted);
  font-size: 0.96rem;
}

.project-detail {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.clean-list {
  margin: 1rem 0 0;
  padding-left: 1.2rem;
  color: var(--muted);
}

.clean-list li + li {
  margin-top: 0.55rem;
}

.skills-wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.skills-wrap span {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.035);
  color: #dce5ef;
  padding: 0.78rem 1rem;
  border-radius: 999px;
  font-size: 0.95rem;
  transition: transform 0.25s ease, border-color 0.25s ease, background 0.25s ease;
}

.skills-wrap span:hover {
  transform: translateY(-2px);
  border-color: rgba(137, 183, 255, 0.25);
  background: rgba(255, 255, 255, 0.05);
}

.contact-links {
  margin-top: 1.5rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0.88rem 1.2rem;
  border-radius: 999px;
  font-size: 0.95rem;
  font-weight: 600;
  transition:
    transform 0.22s ease,
    opacity 0.22s ease,
    border-color 0.22s ease,
    box-shadow 0.22s ease,
    background 0.22s ease;
}

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

.btn-primary {
  background: var(--text);
  color: #05070a;
}

.btn-primary:hover {
  box-shadow: 0 10px 32px rgba(255, 255, 255, 0.12);
}

.btn-secondary {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
  color: var(--text);
}

.btn-secondary:hover {
  border-color: rgba(137, 183, 255, 0.35);
  background: rgba(255, 255, 255, 0.05);
}

.footer {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 1.4rem 2.2rem;
  color: var(--muted-2);
  font-size: 0.92rem;
  position: relative;
  z-index: 1;
}

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity 0.85s ease,
    transform 0.85s cubic-bezier(0.22, 1, 0.36, 1);
}

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

.reveal-group .stagger {
  opacity: 0;
  transform: translateY(22px);
  transition:
    opacity 0.8s ease,
    transform 0.8s cubic-bezier(0.22, 1, 0.36, 1);
  transition-delay: var(--delay, 0ms);
}

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

@keyframes ambientFloat {
  0%, 100% {
    transform: translate(0, 0) scale(1);
  }
  50% {
    transform: translate(-10px, -14px) scale(1.03);
  }
}

@keyframes bgSignalTravel {
  0% {
    stroke-dashoffset: 790;
  }
  100% {
    stroke-dashoffset: 0;
  }
}

@keyframes bgNodePulse {
  0%, 100% {
    opacity: 0.18;
    transform: scale(1);
  }
  50% {
    opacity: 0.58;
    transform: scale(1.14);
  }
}

@media (max-width: 900px) {
  .section-shell {
    grid-template-columns: 1fr;
    gap: 0.95rem;
  }

  .section-label-wrap {
    padding-left: 1.3rem;
  }

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

  .page-circuit-bg {
    opacity: 0.65 !important;
  }
}

@media (max-width: 760px) {
  .menu-toggle {
    display: inline-flex;
  }

  .nav-links {
    position: absolute;
    top: calc(100% + 10px);
    right: 1rem;
    left: 1rem;
    display: none;
    flex-direction: column;
    align-items: flex-start;
    padding: 1rem;
    border-radius: 20px;
    border: 1px solid var(--line);
    background: rgba(8, 10, 14, 0.96);
  }

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

  .hero-inner {
    padding-top: 7rem;
    padding-bottom: 5rem;
  }

  .hero-subtext {
    font-size: 1rem;
  }

  .page-circuit-bg {
    opacity: 0.45 !important;
  }

  .info-card,
  .project-card,
  .mini-card,
  .project-detail-block {
    transform: none !important;
  }
}