:root {
  --bg: #f7f6f3;
  --paper: #fbfaf8;
  --ink: #232a33;
  --muted: #5e6672;
  --primary: #4a5d68;
  --accent: #8f7f6c;
  --card: #f3f0eb;
  --card-2: #eff2f4;
  --line: #d7dbe0;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

section[id] {
  scroll-margin-top: 5.5rem;
}

body {
  margin: 0;
  overflow-x: hidden;
  background:
    radial-gradient(circle at 12% 10%, #f4f1ea 0%, transparent 36%),
    radial-gradient(circle at 88% 5%, #edf1f4 0%, transparent 30%),
    var(--bg);
  color: var(--ink);
  font-family: "Manrope", sans-serif;
  line-height: 1.6;
}

a {
  color: inherit;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 0.75rem 1.25rem;
  background: rgba(255, 253, 249, 0.92);
  border-bottom: 1px solid #ece8df;
  backdrop-filter: blur(8px);
}

.home-page .topbar {
  position: fixed;
  left: 0;
  right: 0;
  transform: translateY(-115%);
  opacity: 0;
  pointer-events: none;
  transition: transform 360ms ease, opacity 260ms ease;
}

.home-page.scrolled-past-about .topbar {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}

.brand {
  font-family: "Playfair Display", serif;
  font-size: 1.4rem;
  font-weight: 700;
  white-space: nowrap;
}

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

.jump-btn {
  text-decoration: none;
  padding: 0.4rem 0.75rem;
  border: 1px solid #d4d9dd;
  border-radius: 999px;
  font-size: 0.9rem;
  color: var(--primary);
  background: #f7f8f9;
  transition: 0.2s ease;
}

.jump-btn:hover {
  transform: translateY(-1px);
  border-color: #c2c9cf;
  background: #f0f3f5;
}

.page-wrap {
  max-width: 1080px;
  margin: 0 auto;
  padding: 1.5rem 1rem 3rem;
}

.home-wrap {
  padding-top: 0;
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 2rem;
  align-items: center;
  padding: 1rem 0 2rem;
}

#about {
  min-height: 100svh;
  padding: clamp(1.25rem, 2.8vw, 2.2rem);
  padding-bottom: clamp(4rem, 8vh, 5.5rem);
  align-content: center;
  justify-items: center;
  grid-template-columns: 1fr;
  text-align: center;
  isolation: isolate;
}

#about .hero-text {
  max-width: min(980px, 94vw);
}

#about .social-row {
  justify-content: center;
}

#about::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 100vw;
  transform: translateX(-50%);
  z-index: -1;
  background:
    radial-gradient(140% 96% at 18% 12%, rgba(242, 246, 251, 0.82) 0%, rgba(242, 246, 251, 0.24) 44%, rgba(242, 246, 251, 0) 74%),
    linear-gradient(160deg, #e3e8ee 0%, #d5dce4 38%, #c6cfd9 68%, #b9c3ce 100%);
  transition: background 180ms ease;
}

#about:target::before {
  background:
    radial-gradient(140% 96% at 18% 12%, rgba(234, 240, 247, 0.68) 0%, rgba(234, 240, 247, 0.16) 42%, rgba(234, 240, 247, 0) 74%),
    linear-gradient(160deg, #d2dae3 0%, #c1cad5 42%, #b1bcc8 71%, #a2aebc 100%);
}

#about::after {
  content: "";
  position: absolute;
  left: 50%;
  width: 100vw;
  transform: translateX(-50%);
  bottom: -5.5rem;
  height: 15rem;
  pointer-events: none;
  background: linear-gradient(
    to bottom,
    rgba(214, 223, 233, 0) 0%,
    rgba(214, 223, 233, 0.1) 18%,
    rgba(218, 226, 235, 0.28) 40%,
    rgba(226, 232, 238, 0.56) 64%,
    rgba(236, 239, 241, 0.82) 82%,
    rgba(247, 246, 243, 1) 100%
  );
}

.home-page #about::before {
  animation: heroBackdropIn 1200ms ease-out both;
}

.home-page #about .hero-text {
  opacity: 0;
  transform: translateY(26px);
  animation: heroFloatIn 1400ms cubic-bezier(0.2, 0.8, 0.2, 1) 180ms forwards;
}

.home-page #about .hero-photo-wrap {
  opacity: 0;
  transform: translateY(30px) scale(0.985);
  animation: heroFloatIn 1600ms cubic-bezier(0.2, 0.8, 0.2, 1) 340ms forwards;
}

.home-page #about .social-row {
  opacity: 0;
  transform: translateY(16px);
  animation: heroFloatIn 1200ms cubic-bezier(0.2, 0.8, 0.2, 1) 480ms forwards;
}

.home-page #about .hero-photo {
  animation: heroPortraitBob 8s ease-in-out 1.8s infinite;
}

.scroll-next {
  position: absolute;
  left: 50%;
  bottom: clamp(1rem, 2.4vh, 1.5rem);
  transform: translateX(-50%);
  z-index: 2;
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  padding: 0.45rem 0.8rem;
  border-radius: 999px;
  border: 1px solid rgba(70, 86, 102, 0.4);
  background: rgba(244, 248, 252, 0.52);
  color: #2f3f4f;
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.02em;
  backdrop-filter: blur(4px);
  opacity: 0;
  animation: heroFloatInCentered 1200ms cubic-bezier(0.2, 0.8, 0.2, 1) 620ms forwards;
}

.scroll-next:hover {
  background: rgba(244, 248, 252, 0.7);
}

.scroll-next-label {
  font-size: 0.8rem;
  text-transform: uppercase;
}

.scroll-next-arrow {
  display: inline-block;
  font-size: 1.2rem;
  line-height: 1;
  animation: heroScrollCue 1.6s ease-in-out infinite;
}

@keyframes heroFloatIn {
  from {
    opacity: 0;
    transform: translateY(26px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes heroBackdropIn {
  from {
    opacity: 0;
    transform: translateX(-50%) scale(1.015);
  }
  to {
    opacity: 1;
    transform: translateX(-50%) scale(1);
  }
}

@keyframes heroPortraitBob {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-6px);
  }
}

@keyframes heroScrollCue {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(4px);
  }
}

@keyframes heroFloatInCentered {
  from {
    opacity: 0;
    transform: translateX(-50%) translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
  }
}

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

.eyebrow {
  margin: 0;
  color: var(--primary);
  font-size: 0.9rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  font-family: "Playfair Display", serif;
  margin-top: 0;
}

h1 {
  font-size: clamp(2.1rem, 3.5vw, 3.2rem);
  margin-bottom: 0.6rem;
}

h2 {
  font-size: clamp(1.6rem, 2.2vw, 2rem);
  margin-bottom: 0.75rem;
}

.hero-focus-line {
  margin-top: 0;
  margin-bottom: 0.7rem;
  color: #41576a;
  font-family: "Roboto Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  letter-spacing: 0.01em;
  font-size: clamp(0.9rem, 1.35vw, 1.12rem);
  line-height: 1.35;
}

.focus-dot {
  display: inline-block;
  margin: 0 0.28ch;
}

.lead {
  margin-top: 0;
  font-size: 1.05rem;
  color: var(--muted);
  max-width: 62ch;
}

.hero-photo-wrap {
  justify-self: center;
}

.hero-photo {
  width: min(380px, 88vw);
  aspect-ratio: 4/3;
  object-fit: cover;
  border-radius: 5px;
  border: 1px solid #cfd5db;
  box-shadow: 0 10px 22px rgba(34, 51, 66, 0.12);
}

.social-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1rem;
}

.social-icons {
  gap: 0.9rem;
  margin-top: 1.15rem;
}

.social-btn {
  text-decoration: none;
  background: var(--primary);
  color: #fff;
  padding: 0.5rem 0.9rem;
  border-radius: 8px;
  font-size: 0.9rem;
}

.social-btn:hover {
  background: #3f505b;
}

.social-icon-link {
  width: 50px;
  height: 50px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  border: 2px solid #344858;
  background: rgba(238, 244, 250, 0.55);
  color: #253848;
  text-decoration: none;
  transition: transform 180ms ease, background 180ms ease, border-color 180ms ease;
}

.social-icon-link:hover {
  transform: translateY(-2px);
  border-color: #263747;
  background: rgba(229, 238, 247, 0.92);
}

.social-icon-link svg {
  width: 26px;
  height: 26px;
  display: block;
  fill: currentColor;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.inline-accent-link {
  color: #324b61;
  text-decoration-line: underline;
  text-decoration-color: #7f98b0;
  text-decoration-thickness: 2px;
  text-underline-offset: 0.2em;
  transition: color 160ms ease, text-decoration-color 160ms ease;
}

.inline-accent-link:hover {
  color: #223748;
  text-decoration-color: #4f6e8a;
}

.content-section {
  margin: 3.2rem 0;
  padding: 0.2rem 0;
}

.about-me-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: clamp(0.7rem, 1.6vw, 1.1rem);
  align-items: center;
}

.about-me-copy {
  max-width: 66ch;
}

.about-pill-row {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.55rem;
  margin-top: 1.1rem;
}

.about-pill {
  display: inline-flex;
  align-items: center;
  padding: 0.45rem 0.9rem;
  border-radius: 4px;
  border: 1px solid #d0d0d1;
  background: rgba(255, 255, 255, 0.9);
  color: #0e0e0e;
  font-size: clamp(0.95rem, 1.45vw, 1.05rem);
  line-height: 1.2;
  /* box-shadow: 0 20x 8px rgba(47, 61, 74, 0.06); */
}

.about-me-photo-wrap {
  justify-self: end;
  width: min(400px, 82vw);
  align-self: start;
  margin-top: clamp(1.1rem, 8.4vw, 6rem);
}

.about-me-photo {
  width: 100%;
}

.content-section ul {
  margin: 0.6rem 0 0;
  padding-left: 1.2rem;
}

.content-section li::marker {
  color: var(--accent);
}

.pub-list {
  display: grid;
  gap: 0.9rem;
}

.pub-item {
  display: grid;
  grid-template-columns: 130px 1fr;
  gap: 0.95rem;
  align-items: start;
  padding: 0.9rem 1rem;
  border: 1px solid #d7dde3;
  border-left: 4px solid #afbfce;
  background: #eef2f6;
  border-radius: 12px;
}

.pub-marker {
  padding-top: 0.05rem;
}

.pub-index {
  margin: 0;
  font-family: "Playfair Display", serif;
  font-size: 1.4rem;
  line-height: 1;
  color: #405566;
}

.pub-loc-year {
  margin: 0.45rem 0 0;
  font-size: 0.86rem;
  line-height: 1.25;
  color: #5a6a79;
  font-weight: 700;
}

.pub-main h3 {
  margin: 0;
}

.pub-item p {
  margin: 0.35rem 0 0.85rem;
  color: var(--muted);
}

.pub-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.42rem 0.85rem;
  border-radius: 8px;
  border: 1px solid #b7c4d1;
  background: #e9eef4;
  color: #3a5065;
  text-decoration: none;
  font-weight: 700;
  font-size: 0.9rem;
  transition: background 160ms ease, border-color 160ms ease, transform 160ms ease;
}

.pub-btn:hover {
  background: #e2e9f1;
  border-color: #a5b5c5;
  transform: translateY(-1px);
}

.text-link {
  color: var(--primary);
  text-decoration: none;
  margin-right: 1rem;
  font-weight: 700;
}

.text-link:hover {
  text-decoration: underline;
}

.timeline {
  position: relative;
  margin-top: 0.5rem;
  padding-left: 1.5rem;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 0.45rem;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--line);
}

.exp-block {
  position: relative;
  background: var(--card-2);
  border: 1px solid #d7dde3;
  border-radius: 12px;
  padding: 1rem;
  margin-bottom: 0.9rem;
}

.exp-block::before {
  content: "";
  position: absolute;
  left: -1.37rem;
  top: 1rem;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--primary);
  box-shadow: 0 0 0 3px #edf7f6;
}

.exp-meta {
  margin: 0 0 0.3rem;
  color: #455668;
  font-weight: 700;
  font-size: 0.9rem;
}

.exp-block h3 {
  margin-bottom: 0.5rem;
}

.exp-block ul {
  margin: 0;
}

.exp-block li {
  color: #3f4d5b;
}

.exp-block li::marker {
  color: #8c7a64;
}

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

.card {
  background: var(--card);
  border: 1px solid #ddd7cf;
  border-radius: 14px;
  padding: 1rem;
}

.card h3 {
  margin-bottom: 0.35rem;
}

.card p {
  margin-top: 0;
  color: var(--muted);
}

.meta-line {
  display: block;
  margin-bottom: 0.6rem;
  color: #6f6760;
  font-size: 0.9rem;
}

.read-btn {
  display: inline-block;
  text-decoration: none;
  background: #f5f7f8;
  color: var(--primary);
  border: 1px solid #c3cad0;
  padding: 0.4rem 0.75rem;
  border-radius: 7px;
  font-weight: 700;
}

.read-btn:hover {
  background: #eef2f5;
}

.blog-controls {
  margin: 1rem 0 1.25rem;
  display: grid;
  gap: 0.7rem;
}

.blog-search-wrap {
  display: grid;
  gap: 0.35rem;
  color: #4a5d6f;
  font-weight: 700;
  font-size: 0.92rem;
}

#blog-search {
  width: min(560px, 100%);
  padding: 0.55rem 0.7rem;
  border: 1px solid #c6d0da;
  border-radius: 9px;
  background: #f7fafc;
  color: #2d3f52;
  font: inherit;
}

#blog-search:focus {
  outline: 2px solid #a8bccf;
  outline-offset: 1px;
}

.blog-tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  align-items: center;
}

.blog-tag-label {
  font-size: 0.88rem;
  color: #5a6877;
  font-weight: 700;
  margin-right: 0.1rem;
}

.blog-tag-filter {
  border: 1px solid #c2ccd6;
  background: #f1f4f7;
  color: #405365;
  border-radius: 999px;
  padding: 0.28rem 0.65rem;
  font-size: 0.82rem;
  line-height: 1.2;
  cursor: pointer;
}

.blog-tag-filter:hover {
  background: #e9eef4;
}

.blog-tag-filter.is-active {
  border-color: #8ea5bc;
  background: #dce6f0;
  color: #284157;
}

.post-tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin: 0 0 0.7rem;
}

.post-tag {
  display: inline-flex;
  align-items: center;
  border: 1px solid #cbd5de;
  background: #f5f8fb;
  color: #4c5f71;
  border-radius: 999px;
  padding: 0.16rem 0.5rem;
  font-size: 0.76rem;
  line-height: 1.2;
}

.note-list {
  display: grid;
  gap: 0.8rem;
}

.note-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  border-radius: 10px;
  border: 1px solid #ddd9d2;
  background: #faf9f7;
}

.note-item p {
  margin: 0;
}

.note-item strong {
  display: block;
}

.note-browser {
  display: grid;
  gap: 1.05rem;
}

.note-last-updated {
  margin: -0.1rem 0 0.95rem;
  color: #51687c;
  font-size: 0.9rem;
  font-weight: 700;
}

.note-section {
  border: 1px solid #c3ced8;
  border-radius: 15px;
  background: linear-gradient(180deg, #e4ebf2 0%, #dbe4ee 100%);
  box-shadow: 0 8px 20px rgba(35, 50, 66, 0.08);
  overflow: clip;
  transition: border-color 180ms ease, box-shadow 180ms ease;
}

.note-section > summary {
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.8rem;
  cursor: pointer;
  padding: 0.88rem 1rem;
  font-weight: 800;
  color: #2f4254;
  background: linear-gradient(180deg, rgba(222, 232, 241, 0.98) 0%, rgba(213, 225, 237, 0.98) 100%);
  border-bottom: 1px solid #c7d4e1;
}

.note-section > summary::before {
  content: ">";
  display: inline-block;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  font-size: 1.05rem;
  margin-right: 0.45rem;
  color: #516a81;
  transform: rotate(0deg);
  transition: transform 140ms ease;
}

.note-section > summary::-webkit-details-marker {
  display: none;
}

.note-section > summary::marker {
  content: "";
}

.note-section[open] > summary::before {
  transform: rotate(90deg);
}

.note-section[open] > summary {
  background: linear-gradient(180deg, rgba(209, 222, 235, 0.98) 0%, rgba(199, 214, 229, 0.98) 100%);
}

.note-summary-main {
  display: inline-flex;
  align-items: center;
  min-width: 0;
}

.note-summary-title {
  font-size: 1rem;
  letter-spacing: 0.01em;
}

.note-section-body {
  padding: 0.95rem 1rem 1rem;
  background: linear-gradient(180deg, rgba(237, 243, 249, 0.92) 0%, rgba(230, 238, 246, 0.92) 100%);
}

.note-count {
  font-size: 0.83rem;
  font-weight: 700;
  color: #3f566c;
  background: rgba(244, 249, 253, 0.9);
  border: 1px solid #bfd0df;
  border-radius: 999px;
  padding: 0.16rem 0.54rem;
  white-space: nowrap;
}

.note-course-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.7rem;
}

.note-course-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 0.75rem;
  border: 1px solid #c5d3e0;
  border-radius: 11px;
  background: #edf4fb;
  padding: 0.78rem 0.86rem;
  box-shadow: 0 2px 8px rgba(36, 53, 71, 0.06);
}

.note-course-card h3 {
  margin: 0 0 0.2rem;
  font-family: "Roboto Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  font-size: 0.98rem;
  color: #2f455a;
}

.note-course-meta {
  margin: 0 0 0.58rem;
  color: #4d6378;
  font-size: 0.8rem;
  font-weight: 700;
}

.note-doc-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem;
  justify-content: flex-end;
}

.note-doc-btn {
  font-size: 0.78rem;
  padding: 0.33rem 0.6rem;
  border-radius: 7px;
  border-color: #a9bed1;
  background: #dce8f3;
  color: #32495e;
}

.note-doc-btn:hover {
  background: #cfdfed;
}

.note-empty-block {
  margin: 0;
  padding: 0.75rem 0.8rem;
  border: 1px dashed #bccddd;
  border-radius: 10px;
  background: #eaf2f9;
}

.note-course-main {
  min-width: 0;
}

.empty-state {
  color: var(--muted);
}

@media (max-width: 860px) {
  .hero {
    grid-template-columns: 1fr;
    text-align: left;
  }

  #about {
    min-height: 100svh;
  }

  #about {
    text-align: center;
  }

  #about .social-row {
    justify-content: center;
  }

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

  .about-me-photo-wrap {
    justify-self: start;
    margin-top: 0.35rem;
  }

  .pub-item {
    grid-template-columns: 1fr;
    gap: 0.55rem;
  }

  .pub-marker {
    display: flex;
    align-items: baseline;
    gap: 0.5rem;
  }

  .pub-loc-year {
    margin-top: 0;
  }

  .note-course-grid {
    grid-template-columns: 1fr;
  }

  .note-course-card {
    grid-template-columns: 1fr;
  }

  .note-doc-row {
    justify-content: flex-start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .home-page #about::before,
  .home-page #about .hero-text,
  .home-page #about .hero-photo-wrap,
  .home-page #about .social-row,
  .home-page #about .hero-photo,
  .scroll-next,
  .scroll-next-arrow {
    animation: none;
    opacity: 1;
    transform: none;
  }

  .scroll-next {
    transform: translateX(-50%);
  }
}