:root {
  --ink: #060a2f;
  --ink-soft: rgba(6, 10, 47, 0.68);
  --ink-dimmer: rgba(6, 10, 47, 0.45);
  --ink-line: rgba(6, 10, 47, 0.16);
  --ink-line-soft: rgba(6, 10, 47, 0.08);
  --paper: #ffffff;
  --paper-2: #f2f3f9;
  --on-ink: #ffffff;
  --on-ink-soft: rgba(255, 255, 255, 0.75);
  --on-ink-dimmer: rgba(255, 255, 255, 0.5);
  --on-ink-line: rgba(255, 255, 255, 0.24);
  --radius: 14px;
  --max: 1040px;
  --serif-display: "Italiana", Georgia, "Times New Roman", serif;
  --serif: "Fraunces", Georgia, "Times New Roman", serif;
  --sans: "Public Sans", -apple-system, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: 84px; }

body {
  margin: 0;
  padding-top: 84px;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; animation: none !important; }
}

.noise {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: 0.035;
  background-image: radial-gradient(circle at 1px 1px, var(--ink) 1px, transparent 0);
  background-size: 3px 3px;
}

/* ---------- Scroll progress ---------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  z-index: 60;
  background: transparent;
}

.scroll-progress-bar {
  height: 100%;
  width: 0%;
  background: var(--ink);
}

/* ---------- Nav ---------- */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.85);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--ink-line-soft);
}


.nav-inner {
  position: relative;
  max-width: var(--max);
  margin: 0 auto;
  padding: 18px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
}

.nav-logo img {
  display: block;
  height: 44px;
  width: auto;
  transform: translateY(3px);
}

.nav-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 34px;
  height: 34px;
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.nav-toggle:focus-visible { outline: 2px solid var(--ink); outline-offset: 4px; }

.nav-links {
  position: absolute;
  top: calc(100% + 8px);
  right: 24px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 190px;
  background: var(--paper);
  border: 1px solid var(--ink-line);
  border-radius: 12px;
  padding: 8px;
  box-shadow: 0 20px 40px -18px rgba(6, 10, 47, 0.28);
  opacity: 0;
  transform: translateY(-8px);
  pointer-events: none;
  transition: opacity 0.22s ease, transform 0.22s ease;
}

.nav-links.open { opacity: 1; transform: translateY(0); pointer-events: auto; }

.nav-links a {
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 0.92rem;
  letter-spacing: 0.01em;
  padding: 10px 14px;
  border-radius: 8px;
  transition: color 0.2s ease, background 0.2s ease;
}

.nav-links a:hover { color: var(--ink); background: var(--paper-2); }

.nav-links a.active { color: var(--ink); font-weight: 600; background: var(--paper-2); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  padding: 110px 24px 90px;
  text-align: center;
  background: var(--ink);
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: -20% -10%;
  background: radial-gradient(ellipse 60% 50% at 50% 0%, rgba(255, 255, 255, 0.07), transparent 70%);
  pointer-events: none;
  transform: translateY(var(--parallax-y, 0px));
  will-change: transform;
}

.hero-glow {
  position: absolute;
  top: 0;
  left: 0;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.08), transparent 70%);
  transform: translate(-50%, -50%);
  opacity: 0;
  transition: opacity 0.4s ease;
  pointer-events: none;
}

.hero-glow.visible { opacity: 1; }

.hero-inner { position: relative; max-width: 680px; margin: 0 auto; }

.hero h1 {
  font-family: var(--serif-display);
  font-size: clamp(2.6rem, 5.5vw, 3.8rem);
  margin: 0 0 14px;
  font-weight: 400;
  letter-spacing: 0.01em;
  text-wrap: balance;
  color: var(--on-ink);
}

.hero-role {
  color: var(--on-ink-soft);
  font-size: 1.05rem;
  margin: 0 0 20px;
  letter-spacing: 0.01em;
  min-height: 1.4em;
}

.hero-role::after {
  content: "";
  display: inline-block;
  width: 1px;
  height: 1em;
  margin-left: 3px;
  background: var(--on-ink-soft);
  vertical-align: -0.15em;
  animation: caret-blink 0.9s step-end infinite;
}

.hero-role.typing-done::after { animation: none; opacity: 0; }

@keyframes caret-blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

.hero-tagline {
  color: var(--on-ink-soft);
  font-size: 1.02rem;
  max-width: 560px;
  margin: 0 auto 36px;
  text-wrap: balance;
}

.hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

.btn {
  display: inline-block;
  padding: 13px 28px;
  border-radius: 999px;
  font-size: 0.92rem;
  text-decoration: none;
  letter-spacing: 0.02em;
  transition: all 0.2s ease;
}

.btn:focus-visible { outline: 2px solid var(--on-ink); outline-offset: 3px; }

.btn-primary { background: var(--on-ink); color: var(--ink); font-weight: 600; }
.btn-primary:hover { background: #e6e8f2; transform: translateY(-1px); }

.btn-ghost { color: var(--on-ink); border: 1px solid var(--on-ink-line); }
.btn-ghost:hover { border-color: var(--on-ink); background: rgba(255, 255, 255, 0.06); }

/* ---------- Sections ---------- */
.section { padding: 80px 24px; position: relative; z-index: 1; }
.section.alt { background: var(--paper-2); }
.section-inner { max-width: var(--max); margin: 0 auto; }

.kicker {
  color: var(--ink);
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-size: 0.72rem;
  margin: 0 0 28px;
  font-weight: 600;
}

.kicker-sticky {
  position: sticky;
  top: 84px;
  z-index: 5;
  width: fit-content;
  padding: 6px 0;
  background: var(--paper);
}

.section.alt .kicker-sticky { background: var(--paper-2); }

.profile-text { max-width: 720px; color: var(--ink-soft); font-size: 1.05rem; margin: 0 0 44px; }

.chip-groups { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }

.chip-group h3 {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ink-dimmer);
  margin: 0 0 14px;
  font-weight: 600;
}

.chips { display: flex; flex-wrap: wrap; gap: 10px; }

.chip {
  border: 1px solid var(--ink-line);
  color: var(--ink);
  background: rgba(6, 10, 47, 0.03);
  padding: 7px 16px;
  border-radius: 999px;
  font-size: 0.86rem;
}

.chip-small { padding: 5px 13px; font-size: 0.8rem; }

/* ---------- Timeline ---------- */
.timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 28px;
  border-left: 1px solid var(--ink-line);
}

.timeline-item { position: relative; padding-bottom: 48px; }
.timeline-item:last-child { padding-bottom: 0; }

.timeline-marker {
  position: absolute;
  left: -33px;
  top: 6px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--ink);
  box-shadow: 0 0 0 4px var(--paper);
}

.section.alt .timeline-marker { box-shadow: 0 0 0 4px var(--paper-2); }

.timeline-content h3 { margin: 0 0 6px; font-family: var(--serif); font-size: 1.25rem; font-weight: 600; color: var(--ink); }

.timeline-date {
  display: block;
  color: var(--ink-soft);
  font-size: 0.8rem;
  letter-spacing: 0.02em;
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
  margin: 0 0 6px;
}

.timeline-org { color: var(--ink-soft); margin: 0 0 14px; font-style: italic; }

.timeline-content ul { margin: 0; padding-left: 20px; color: var(--ink-soft); font-size: 0.95rem; }
.timeline-content li { margin-bottom: 6px; }

/* ---------- Education ---------- */
.edu-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }

.edu-card {
  border: 1px solid var(--ink-line);
  border-radius: var(--radius);
  padding: 28px;
  background: var(--paper);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.edu-card:hover {
  transform: translateY(-4px);
  border-color: var(--ink-dimmer);
  box-shadow: 0 16px 28px -18px rgba(6, 10, 47, 0.28);
}

.edu-card h3 { margin: 0 0 6px; font-family: var(--serif); font-size: 1.15rem; font-weight: 600; color: var(--ink); }
.edu-detail { color: var(--ink-soft); margin: 10px 0 0; font-size: 0.92rem; }
.edu-card .chips { margin-top: 16px; }

/* ---------- Projects ---------- */
.proj-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }

.proj-card {
  border: 1px solid var(--ink-line);
  border-radius: var(--radius);
  padding: 28px;
  background: var(--paper);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.proj-card:hover {
  transform: translateY(-4px);
  border-color: var(--ink-dimmer);
  box-shadow: 0 16px 28px -18px rgba(6, 10, 47, 0.28);
}

.proj-card h3 { margin: 0 0 6px; font-family: var(--serif); font-size: 1.15rem; font-weight: 600; color: var(--ink); }
.proj-card ul { margin: 14px 0 0; padding-left: 20px; color: var(--ink-soft); font-size: 0.94rem; }
.proj-card li { margin-bottom: 6px; }

.proj-result {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--ink-line-soft);
  color: var(--ink);
  font-size: 0.88rem;
  font-style: italic;
}

/* ---------- CV download ---------- */
.download-section { padding: 40px 24px; }

.download-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 18px;
  border: 1px solid var(--ink-line);
  border-radius: var(--radius);
  padding: 26px 32px;
  background: var(--paper-2);
}

.download-label {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 0.68rem;
  color: var(--ink-dimmer);
  margin: 0 0 4px;
  font-weight: 600;
}

.download-title {
  font-family: var(--serif);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--ink);
  margin: 0;
}

.download-card .btn-primary { background: var(--ink); color: var(--on-ink); white-space: nowrap; }
.download-card .btn-primary:hover { background: #12175c; }

/* ---------- Contact ---------- */
.contact {
  text-align: center;
  background: var(--ink);
}

.contact h2 { font-family: var(--serif); font-size: clamp(1.9rem, 4vw, 2.5rem); margin: 0 0 12px; font-weight: 600; color: var(--on-ink); }
.contact-sub { color: var(--on-ink-soft); max-width: 480px; margin: 0 auto 44px; }

.contact-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; text-align: left; }

.contact-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  border: 1px solid var(--on-ink-line);
  border-radius: var(--radius);
  padding: 20px;
  color: var(--on-ink);
  text-decoration: none;
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.contact-card:hover { border-color: var(--on-ink); transform: translateY(-2px); }
.contact-card:focus-visible { outline: 2px solid var(--on-ink); outline-offset: 2px; }

.contact-label { text-transform: uppercase; letter-spacing: 0.1em; font-size: 0.68rem; color: var(--on-ink-dimmer); }
.contact-value { font-size: 0.9rem; word-break: break-word; color: var(--on-ink); }

/* ---------- Footer ---------- */
.footer {
  text-align: center;
  padding: 30px 24px 40px;
  color: var(--ink-dimmer);
  font-size: 0.82rem;
  border-top: 1px solid var(--ink-line-soft);
}

/* ---------- Floating actions ---------- */
.floating-actions {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 55;
  display: flex;
  flex-direction: column;
  gap: 12px;
  opacity: 0;
  transform: translateY(12px);
  pointer-events: none;
  transition: opacity 0.35s ease, transform 0.35s ease;
}

.floating-actions.visible { opacity: 1; transform: translateY(0); pointer-events: auto; }

.fab {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--ink);
  color: var(--on-ink);
  box-shadow: 0 10px 22px -10px rgba(6, 10, 47, 0.45);
  transition: transform 0.2s ease, background 0.2s ease;
}

.fab svg { width: 20px; height: 20px; }

.fab:hover { transform: translateY(-2px) scale(1.05); background: #12175c; }
.fab:focus-visible { outline: 2px solid var(--ink); outline-offset: 3px; }

/* ---------- Password gate ---------- */
.gate {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background: var(--ink);
}

.gate-form {
  width: 100%;
  max-width: 360px;
  text-align: center;
  border: 1px solid var(--on-ink-line);
  border-radius: var(--radius);
  padding: 40px 32px;
  background: rgba(255, 255, 255, 0.04);
}

.gate-eyebrow {
  color: var(--on-ink-soft);
  text-transform: uppercase;
  letter-spacing: 0.18em;
  font-size: 0.68rem;
  font-weight: 600;
  margin: 0 0 18px;
}

.gate-form h1 {
  font-family: var(--serif);
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--on-ink);
  margin: 0 0 10px;
}

.gate-sub {
  color: var(--on-ink-soft);
  font-size: 0.9rem;
  margin: 0 0 24px;
}

.gate-form input {
  width: 100%;
  box-sizing: border-box;
  padding: 13px 16px;
  border-radius: 10px;
  border: 1px solid var(--on-ink-line);
  background: rgba(255, 255, 255, 0.06);
  color: var(--on-ink);
  font-size: 0.95rem;
  text-align: center;
  letter-spacing: 0.05em;
  margin-bottom: 16px;
}

.gate-form input::placeholder { color: var(--on-ink-dimmer); letter-spacing: normal; }
.gate-form input:focus-visible { outline: 2px solid var(--on-ink); outline-offset: 2px; }

.gate-error {
  display: none;
  color: #ffb4b4;
  font-size: 0.82rem;
  margin: -8px 0 16px;
}

.gate-error.show { display: block; }

.gate-submit { width: 100%; }

/* ---------- Reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.in { opacity: 1; transform: translateY(0); }

/* ---------- Responsive ---------- */
@media (max-width: 820px) {
  .chip-groups { grid-template-columns: 1fr; }
  .edu-grid, .proj-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .nav-links { right: 20px; left: 20px; min-width: 0; }
  .hero { padding: 90px 20px 70px; }
  .section { padding: 60px 20px; }
  .contact-grid { grid-template-columns: 1fr; }
  .timeline { padding-left: 22px; }
  .timeline-marker { left: -27px; }
  .floating-actions { right: 16px; bottom: 16px; }
  .kicker-sticky { top: 70px; }
}