/* ==========================================================================
   Adetokunboh Adesuyi — researcher portfolio
   --------------------------------------------------------------------------
   1.  Design tokens (light + dark)
   2.  Base & typography
   3.  Layout helpers
   4.  Header, navigation & buttons
   5.  Hero
   6.  Sections & prose
   7.  Research cards
   8.  Publications
   9.  CV
   10. Contact
   11. Footer
   12. Motion, focus & responsive tweaks
   ========================================================================== */

/* ==========================================================================
   1. Design tokens
   ========================================================================== */

:root {
  /* Colour — warm paper, near-black ink, one amber accent */
  --bg: #fbfaf7;
  --surface: #ffffff;
  --surface-alt: #f4f1ea;
  --ink: #17181a;
  --ink-soft: #3f423f;
  --muted: #63665f;
  --line: #e4dfd5;
  --line-strong: #d2cabd;
  --accent: #a24d0a;
  --accent-hover: #823c05;
  --accent-soft: #f6e7d3;
  --on-accent: #ffffff;
  --focus: #1a4f8a;

  /* Type */
  --font-sans: "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-serif: "Source Serif 4", Georgia, "Iowan Old Style", "Times New Roman", serif;

  /* Structure */
  --header-h: 4.5rem;
  --radius-sm: 8px;
  --radius: 14px;
  --radius-lg: 20px;
  --shadow-sm: 0 1px 2px rgba(23, 24, 26, 0.04), 0 14px 30px -24px rgba(23, 24, 26, 0.35);
  --shadow-lg: 0 26px 50px -34px rgba(23, 24, 26, 0.45);
}

/* Dark palette follows the system unless the user has chosen light on purpose. */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg: #101112;
    --surface: #17191b;
    --surface-alt: #1d2022;
    --ink: #ece9e3;
    --ink-soft: #cbc8c1;
    --muted: #a3a099;
    --line: #292d30;
    --line-strong: #3b4045;
    --accent: #f0a95e;
    --accent-hover: #f8bf80;
    --accent-soft: #35250f;
    --on-accent: #1a1206;
    --focus: #8fc7ff;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4), 0 16px 32px -24px rgba(0, 0, 0, 0.8);
    --shadow-lg: 0 30px 60px -38px rgba(0, 0, 0, 0.9);
  }
}

:root[data-theme="dark"] {
  --bg: #101112;
  --surface: #17191b;
  --surface-alt: #1d2022;
  --ink: #ece9e3;
  --ink-soft: #cbc8c1;
  --muted: #a3a099;
  --line: #292d30;
  --line-strong: #3b4045;
  --accent: #f0a95e;
  --accent-hover: #f8bf80;
  --accent-soft: #35250f;
  --on-accent: #1a1206;
  --focus: #8fc7ff;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4), 0 16px 32px -24px rgba(0, 0, 0, 0.8);
  --shadow-lg: 0 30px 60px -38px rgba(0, 0, 0, 0.9);
}

/* ==========================================================================
   2. Base & typography
   ========================================================================== */

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 1.5rem);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: clamp(1rem, 0.97rem + 0.16vw, 1.0625rem);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-serif);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.015em;
  text-wrap: balance;
  margin: 0;
}

p {
  text-wrap: pretty;
}

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

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

img {
  max-width: 100%;
}

button {
  font-family: inherit;
}

[hidden] {
  display: none !important;
}

::selection {
  background: var(--accent-soft);
  color: var(--ink);
}

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

.icon {
  width: 1.05rem;
  height: 1.05rem;
  flex: none;
}

/* Screen-reader-only text */
.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;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 100;
  padding: 0.65rem 1rem;
  background: var(--accent);
  color: var(--on-accent);
  font-size: 0.85rem;
  font-weight: 500;
  text-decoration: none;
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 0;
  color: var(--on-accent);
}

/* ==========================================================================
   3. Layout helpers
   ========================================================================== */

.wrap {
  width: 100%;
  max-width: 1120px;
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 5vw, 2.75rem);
}

/* ==========================================================================
   4. Header, navigation & buttons
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--bg);
  border-bottom: 1px solid var(--line);
}

@supports (backdrop-filter: blur(1px)) {
  .site-header {
    background: color-mix(in srgb, var(--bg) 88%, transparent);
    backdrop-filter: blur(14px) saturate(115%);
  }
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  min-height: var(--header-h);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  color: var(--ink);
  text-decoration: none;
  flex: none;
}

.brand:hover {
  color: var(--ink);
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 2.2rem;
  height: 2.2rem;
  border-radius: 50%;
  background: var(--accent);
  color: var(--on-accent);
  font-family: var(--font-serif);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.brand-text {
  display: flex;
  flex-direction: column;
  font-family: var(--font-serif);
  font-size: 1.02rem;
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.01em;
}

.brand-sub {
  margin-top: 0.18rem;
  font-family: var(--font-sans);
  font-size: 0.64rem;
  font-weight: 500;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}

.nav-panel {
  display: flex;
  align-items: center;
  gap: clamp(1rem, 2.6vw, 2.4rem);
}

.nav-list {
  display: flex;
  align-items: center;
  gap: clamp(0.95rem, 1.9vw, 1.8rem);
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-list a {
  position: relative;
  display: inline-block;
  padding: 0.4rem 0;
  color: var(--ink-soft);
  font-size: 0.875rem;
  font-weight: 500;
  text-decoration: none;
  transition: color 0.2s ease;
}

.nav-list a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s ease;
}

.nav-list a:hover,
.nav-list a[aria-current="true"] {
  color: var(--ink);
}

.nav-list a:hover::after,
.nav-list a[aria-current="true"]::after {
  transform: scaleX(1);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.theme-toggle {
  display: grid;
  place-items: center;
  width: 2.4rem;
  height: 2.4rem;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: transparent;
  color: var(--ink-soft);
  cursor: pointer;
  transition: border-color 0.2s ease, color 0.2s ease, background-color 0.2s ease;
}

.theme-toggle:hover {
  border-color: var(--line-strong);
  background: var(--surface-alt);
  color: var(--ink);
}

.theme-toggle .icon-sun {
  display: none;
}

:root[data-theme="dark"] .theme-toggle .icon-sun {
  display: block;
}

:root[data-theme="dark"] .theme-toggle .icon-moon {
  display: none;
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 2.6rem;
  height: 2.6rem;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: transparent;
  color: var(--ink);
  cursor: pointer;
}

.nav-toggle-bars {
  display: grid;
  gap: 4px;
  width: 16px;
}

.nav-toggle-bars span {
  display: block;
  height: 1.5px;
  width: 100%;
  background: currentColor;
  transition: transform 0.25s ease, opacity 0.2s ease;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(1) {
  transform: translateY(5.5px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bars span:nth-child(3) {
  transform: translateY(-5.5px) rotate(-45deg);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  min-height: 2.75rem;
  padding: 0.8rem 1.25rem;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 500;
  line-height: 1;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--on-accent);
}

.btn-primary:hover {
  background: var(--accent-hover);
  border-color: var(--accent-hover);
  color: var(--on-accent);
}

.btn-ghost {
  background: transparent;
  border-color: var(--line-strong);
  color: var(--ink);
}

.btn-ghost:hover {
  background: var(--surface-alt);
  border-color: var(--ink-soft);
  color: var(--ink);
}

.btn-quiet {
  background: transparent;
  border-color: transparent;
  color: var(--muted);
  padding-inline: 0.85rem;
}

.btn-quiet:hover:not(:disabled) {
  color: var(--ink);
  background: var(--surface);
}

.btn-quiet:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

.btn-sm {
  min-height: 2.3rem;
  padding: 0.55rem 0.95rem;
  font-size: 0.84rem;
}

/* ==========================================================================
   5. Hero
   ========================================================================== */

.hero {
  padding-block: clamp(2.5rem, 6vw, 4.5rem) clamp(3.25rem, 7vw, 6rem);
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(2rem, 5vw, 3rem);
  align-items: center;
}

.hero-media img {
  display: block;
  width: 100%;
  max-width: 360px;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-lg);
}

.hero-body {
  max-width: 40rem;
}

.eyebrow {
  margin: 0 0 1.1rem;
  color: var(--accent);
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0 0 0.7rem;
  font-size: clamp(2.35rem, 5.6vw, 3.6rem);
  font-weight: 600;
  letter-spacing: -0.032em;
  line-height: 1.02;
}

.hero-affil {
  margin: 0 0 1.5rem;
  max-width: 40ch;
  color: var(--muted);
  font-size: 0.96rem;
  line-height: 1.6;
}

.hero-summary {
  margin: 0 0 1.9rem;
  max-width: 33ch;
  font-family: var(--font-serif);
  font-size: clamp(1.2rem, 2.4vw, 1.5rem);
  line-height: 1.5;
  letter-spacing: -0.01em;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.45rem 1.5rem;
  margin: 1.9rem 0 0;
  padding: 0;
  list-style: none;
  color: var(--muted);
  font-size: 0.86rem;
}

.hero-meta li {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
}

.hero-meta .icon {
  width: 0.95rem;
  height: 0.95rem;
  opacity: 0.8;
}

.hero-meta a {
  color: var(--muted);
  text-decoration: none;
  border-bottom: 1px solid var(--line-strong);
  transition: color 0.2s ease, border-color 0.2s ease;
}

.hero-meta a:hover {
  color: var(--accent);
  border-color: var(--accent);
}

/* ==========================================================================
   6. Sections & prose
   ========================================================================== */

.section {
  padding-block: clamp(3rem, 7vw, 5.5rem);
  border-top: 1px solid var(--line);
}

.section-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.5rem, 4vw, 2.25rem);
  align-items: start;
}

.kicker {
  margin: 0 0 1rem;
  color: var(--accent);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-variant-numeric: tabular-nums;
}

.section h2 {
  margin: 0;
  font-size: clamp(1.8rem, 3.6vw, 2.5rem);
  letter-spacing: -0.02em;
}

.section-note {
  margin: 1.1rem 0 0;
  max-width: 34ch;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.65;
}

.section-note-small {
  margin-top: 0.7rem;
  font-size: 0.8rem;
}

code {
  padding: 0.1em 0.35em;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--surface-alt);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.85em;
}

.prose {
  max-width: 64ch;
}

.prose p {
  margin: 0 0 1.15rem;
  color: var(--ink-soft);
  font-size: 1.02rem;
  line-height: 1.75;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 1.6rem 0 0;
  padding: 0;
  list-style: none;
}

.tag-list li {
  padding: 0.3rem 0.62rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface-alt);
  color: var(--ink-soft);
  font-size: 0.75rem;
  line-height: 1.5;
}

.tag-list-sm {
  margin: 0.45rem 0 1rem;
}

.tag-list-sm li {
  padding: 0.2rem 0.5rem;
  font-size: 0.7rem;
}

/* ==========================================================================
   7. Research cards
   ========================================================================== */

.card-grid {
  display: grid;
  grid-template-columns: 1fr;
  align-items: start;
  gap: 1rem;
}

.theme-group + .theme-group {
  margin-top: clamp(2rem, 4vw, 2.75rem);
}

.theme-heading {
  margin: 0 0 1rem;
  padding-bottom: 0.6rem;
  border-bottom: 1px solid var(--line);
  color: var(--ink-soft);
  font-family: var(--font-sans);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.card {
  display: flex;
  flex-direction: column;
  padding: clamp(1.25rem, 2.4vw, 1.6rem);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}

.card:hover {
  border-color: var(--line-strong);
  box-shadow: var(--shadow-sm);
}

.card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 0.9rem;
}

.status {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.26rem 0.55rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 0.66rem;
  font-weight: 600;
  letter-spacing: 0.09em;
  line-height: 1.4;
  text-transform: uppercase;
}

.status-dot {
  width: 0.38rem;
  height: 0.38rem;
  border-radius: 50%;
  background: currentColor;
}

.status-ongoing {
  border-color: color-mix(in srgb, var(--accent) 28%, transparent);
  background: var(--accent-soft);
  color: var(--accent);
}

.status-completed {
  background: var(--surface-alt);
  color: var(--muted);
}

.card-title {
  margin: 0 0 0.55rem;
  font-size: 1.22rem;
  font-weight: 600;
  line-height: 1.3;
}

.card-summary {
  margin: 0 0 1rem;
  color: var(--ink-soft);
  font-size: 0.92rem;
  line-height: 1.65;
}

/* Collapsible detail: animates height without measuring in JS.
   `visibility` keeps collapsed text out of the accessibility tree and tab order. */
.card-details {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.32s cubic-bezier(0.2, 0.7, 0.3, 1);
}

.card-details-inner {
  overflow: hidden;
  visibility: hidden;
  transition: visibility 0s linear 0.32s;
}

.card.is-open .card-details {
  grid-template-rows: 1fr;
}

.card.is-open .card-details-inner {
  visibility: visible;
  transition-delay: 0s;
}

.card-details p {
  margin: 0 0 0.75rem;
  color: var(--ink-soft);
  font-size: 0.89rem;
  line-height: 1.7;
}

.card-details p:last-child {
  margin-bottom: 0;
}

.card-outcome {
  color: var(--muted) !important;
}

.card-outcome strong {
  color: var(--ink);
  font-weight: 600;
}

/* Without JS the cards cannot expand, so show the full text and drop the button. */
html:not(.js) .card-details {
  grid-template-rows: 1fr;
}

html:not(.js) .card-details-inner {
  visibility: visible;
}

html:not(.js) .link-btn {
  display: none;
}

.link-btn {
  display: inline-flex;
  align-items: center;
  align-self: flex-start;
  gap: 0.35rem;
  margin-top: auto;
  padding: 0.85rem 0 0;
  border: 0;
  background: none;
  color: var(--accent);
  font-size: 0.84rem;
  font-weight: 500;
  cursor: pointer;
}

.link-btn:hover {
  color: var(--accent-hover);
}

.link-btn-icon {
  width: 0.95rem;
  height: 0.95rem;
  transition: transform 0.3s ease;
}

.card.is-open .link-btn-icon {
  transform: rotate(180deg);
}

/* ==========================================================================
   8. Publications
   ========================================================================== */

.pub-block + .pub-block {
  margin-top: clamp(2rem, 4vw, 3rem);
  padding-top: clamp(1.5rem, 3vw, 2rem);
  border-top: 1px solid var(--line);
}

.subhead {
  margin: 0 0 1.1rem;
  font-family: var(--font-sans);
  font-size: 0.76rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted);
}

.pub-block-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem 1rem;
}

.pub-count {
  margin: 0 0 1.1rem;
  color: var(--muted);
  font-size: 0.78rem;
  font-variant-numeric: tabular-nums;
}

/* Selected publications */
.selected-list {
  display: grid;
  gap: 0.6rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.selected-item {
  display: grid;
  grid-template-columns: 5.2rem minmax(0, 1fr);
  gap: 1rem;
  padding: 1rem 1.1rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface);
}

.selected-year {
  margin: 0;
  color: var(--accent);
  font-family: var(--font-serif);
  font-size: 0.95rem;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.selected-title {
  margin: 0 0 0.3rem;
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.4;
}

.selected-authors {
  margin: 0 0 0.2rem;
  color: var(--ink-soft);
  font-size: 0.8rem;
  line-height: 1.55;
}

.selected-authors strong {
  color: var(--ink);
  font-weight: 600;
}

.selected-venue {
  margin: 0;
  color: var(--muted);
  font-size: 0.8rem;
  line-height: 1.55;
}

.selected-item .pub-links {
  margin-top: 0.45rem;
}

.selected-item .pub-link {
  font-size: 0.74rem;
}

/* Filter bar */
.pub-controls {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.8rem;
  align-items: end;
  margin-bottom: 1.5rem;
  padding: 1rem;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--surface-alt);
}

.field {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  min-width: 0;
}

.field-search {
  grid-column: 1 / -1;
}

.field label {
  color: var(--muted);
  font-size: 0.66rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.field input,
.field select {
  width: 100%;
  min-height: 2.5rem;
  padding: 0.5rem 0.7rem;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 0.86rem;
}

.field input::placeholder {
  color: var(--muted);
  opacity: 0.85;
}

.pub-controls .btn-reset {
  grid-column: 1 / -1;
  justify-self: start;
}

/* Full list */
.pub-years {
  margin-top: 0.25rem;
}

.pub-year-group + .pub-year-group {
  margin-top: 1.8rem;
}

.pub-year {
  margin: 0 0 0.2rem;
  padding-bottom: 0.45rem;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-family: var(--font-serif);
  font-size: 0.92rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  font-variant-numeric: tabular-nums;
}

.pub-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.pub {
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--line);
}

.pub:last-child {
  border-bottom: 0;
  padding-bottom: 0.3rem;
}

.pub-authors {
  margin: 0 0 0.3rem;
  color: var(--ink-soft);
  font-size: 0.81rem;
  line-height: 1.55;
}

.pub-authors strong {
  color: var(--ink);
  font-weight: 600;
}

.pub-title {
  margin: 0 0 0.35rem;
  max-width: 60ch;
  font-family: var(--font-serif);
  font-size: 1.04rem;
  font-weight: 600;
  line-height: 1.4;
  transition: color 0.2s ease;
}

.pub:hover .pub-title {
  color: var(--accent);
}

.pub-venue {
  margin: 0 0 0.55rem;
  color: var(--muted);
  font-size: 0.82rem;
  line-height: 1.55;
}

.pub-type {
  display: inline-block;
  margin-right: 0.5rem;
  color: var(--accent);
  font-size: 0.64rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.pub-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem 1rem;
}

.pub-link {
  display: inline-flex;
  align-items: center;
  gap: 0.2rem;
  padding: 0;
  border: 0;
  border-bottom: 1px solid var(--line-strong);
  background: none;
  color: var(--muted);
  font-family: var(--font-sans);
  font-size: 0.76rem;
  font-weight: 500;
  line-height: 1.7;
  text-decoration: none;
  cursor: pointer;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.pub-link:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.pub-link .icon {
  width: 0.75rem;
  height: 0.75rem;
}

.pub-abstract {
  margin: 0.75rem 0 0.2rem;
  padding: 0.85rem 1rem;
  border-left: 2px solid var(--accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: var(--surface-alt);
}

.pub-abstract p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.84rem;
  line-height: 1.7;
}

.pub-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1.5rem;
  margin-top: 1.6rem;
}

.pub-note {
  margin: 0;
  color: var(--muted);
  font-size: 0.8rem;
}

.pub-status,
.pub-empty {
  margin: 0;
  padding: 1.1rem 0;
  color: var(--muted);
  font-size: 0.88rem;
}

.notice {
  margin: 1.25rem 0 0;
  padding: 0.9rem 1rem;
  border: 1px solid var(--line-strong);
  border-left: 2px solid var(--accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: var(--surface-alt);
  color: var(--ink-soft);
  font-size: 0.84rem;
  line-height: 1.65;
}

/* ==========================================================================
   9. CV
   ========================================================================== */

.cv-card {
  padding: clamp(1.4rem, 3vw, 2.2rem);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.cv-lead {
  max-width: 38ch;
  margin: 0 0 0.45rem;
  font-family: var(--font-serif);
  font-size: clamp(1.12rem, 2.2vw, 1.38rem);
  line-height: 1.45;
}

.cv-meta {
  margin: 0 0 1.5rem;
  color: var(--muted);
  font-size: 0.78rem;
  letter-spacing: 0.02em;
}

.cv-preview {
  margin-top: 1.7rem;
  padding-top: 1.2rem;
  border-top: 1px solid var(--line);
}

.cv-preview summary {
  width: fit-content;
  color: var(--accent);
  font-size: 0.84rem;
  font-weight: 500;
  cursor: pointer;
  list-style-position: inside;
}

.cv-preview summary:hover {
  color: var(--accent-hover);
}

.cv-frame {
  margin-top: 1rem;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface-alt);
}

.cv-frame iframe {
  display: block;
  width: 100%;
  height: min(70vh, 560px);
  border: 0;
}

.cv-fallback {
  margin: 0.6rem 0 0;
  color: var(--muted);
  font-size: 0.76rem;
}

/* ==========================================================================
   10. Contact
   ========================================================================== */

.contact-card {
  display: grid;
  gap: 1.1rem;
  padding: clamp(1.4rem, 3vw, 2rem);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.contact-row {
  display: flex;
  align-items: flex-start;
  gap: 0.9rem;
  padding-bottom: 1.15rem;
  border-bottom: 1px solid var(--line);
  color: inherit;
  text-decoration: none;
}

a.contact-row:hover .contact-value {
  color: var(--accent);
}

.contact-icon {
  display: grid;
  place-items: center;
  flex: none;
  width: 2.3rem;
  height: 2.3rem;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: var(--surface-alt);
  color: var(--accent);
}

.contact-text {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.contact-label {
  margin: 0;
  color: var(--muted);
  font-size: 0.66rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.contact-value {
  color: var(--ink);
  font-size: 0.97rem;
  line-height: 1.55;
  overflow-wrap: anywhere;
  transition: color 0.2s ease;
}

.contact-profiles .contact-label {
  margin-bottom: 0.6rem;
}

.profile-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 0.6rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.profile-list a {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.4rem 0.7rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--surface-alt);
  color: var(--ink-soft);
  font-size: 0.8rem;
  text-decoration: none;
  transition: color 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
}

.profile-list a:hover {
  border-color: var(--accent);
  background: transparent;
  color: var(--accent);
}

.profile-list .icon {
  width: 0.8rem;
  height: 0.8rem;
}

.contact-btn {
  justify-self: start;
  margin-top: 0.2rem;
}

/* ==========================================================================
   11. Footer
   ========================================================================== */

.site-footer {
  padding-block: 2.5rem;
  border-top: 1px solid var(--line);
  background: var(--surface-alt);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1.5rem 2rem;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 0.7rem;
}

.brand-mark-sm {
  width: 1.9rem;
  height: 1.9rem;
  font-size: 0.72rem;
}

.footer-name {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 0.98rem;
  font-weight: 600;
}

.footer-role {
  margin: 0;
  color: var(--muted);
  font-size: 0.76rem;
}

.footer-nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1rem;
  margin: 0.2rem 0 0;
  padding: 0;
  list-style: none;
}

.footer-nav a {
  color: var(--muted);
  font-size: 0.79rem;
  text-decoration: none;
  transition: color 0.2s ease;
}

.footer-nav a:hover {
  color: var(--ink);
}

.footer-meta {
  margin-left: auto;
  color: var(--muted);
  font-size: 0.75rem;
  line-height: 1.75;
  text-align: right;
}

.footer-meta p {
  margin: 0;
}

/* ==========================================================================
   12. Motion, focus & responsive tweaks
   ========================================================================== */

/* Scroll reveal — only active when JS is running, so no-JS users see everything. */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.65s cubic-bezier(0.2, 0.7, 0.3, 1), transform 0.65s cubic-bezier(0.2, 0.7, 0.3, 1);
}

.js [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

@media (min-width: 640px) {
  .pub-controls {
    grid-template-columns: repeat(2, minmax(0, 1fr)) auto;
  }

  .pub-controls .btn-reset {
    grid-column: auto;
    justify-self: stretch;
    align-self: end;
    min-height: 2.5rem;
    padding-block: 0;
  }
}

@media (min-width: 700px) {
  .card-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .hero-grid {
    grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.25fr);
    gap: clamp(2.5rem, 6vw, 5rem);
  }

  .hero-body {
    max-width: 38rem;
  }
}

@media (min-width: 900px) {
  .section-inner {
    grid-template-columns: minmax(0, 0.78fr) minmax(0, 1.55fr);
    gap: clamp(2.5rem, 5vw, 4.5rem);
  }

  .section-head {
    position: sticky;
    top: calc(var(--header-h) + 2.5rem);
  }
}

@media (max-width: 899px) {
  .nav-toggle {
    display: inline-flex;
  }

  .nav-panel {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 0.5rem;
    padding: 0.75rem clamp(1.25rem, 5vw, 2.75rem) 1.4rem;
    border-bottom: 1px solid var(--line);
    background: var(--bg);
    box-shadow: var(--shadow-sm);
    visibility: hidden;
    opacity: 0;
    transform: translateY(-6px);
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0s linear 0.2s;
  }

  .nav-panel.is-open {
    visibility: visible;
    opacity: 1;
    transform: none;
    transition-delay: 0s;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

  .nav-list a {
    display: block;
    padding: 0.8rem 0;
    border-bottom: 1px solid var(--line);
    font-size: 0.98rem;
  }

  .nav-list a::after {
    display: none;
  }

  .nav-list a[aria-current="true"] {
    color: var(--accent);
  }

  .nav-actions {
    justify-content: space-between;
    margin-top: 0.9rem;
  }
}

@media (max-width: 640px) {
  .selected-item {
    grid-template-columns: 1fr;
    gap: 0.3rem;
  }

  .selected-year {
    font-size: 0.85rem;
  }

  .footer-meta {
    margin-left: 0;
    text-align: left;
  }
}

@media (max-width: 420px) {
  .brand-sub {
    display: none;
  }

  .nav-actions .btn {
    padding-inline: 0.9rem;
  }

  .hero-actions .btn {
    flex: 1 1 auto;
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

  .js [data-reveal] {
    opacity: 1;
    transform: none;
  }
}

@media print {
  .site-header,
  .nav-toggle,
  .theme-toggle,
  .hero-actions,
  .pub-controls,
  .pub-footer,
  .cv-preview,
  .contact-btn,
  .skip-link {
    display: none !important;
  }

  body {
    background: #fff;
    color: #000;
  }

  .section {
    padding-block: 1.5rem;
    border-color: #ccc;
  }

  .card,
  .cv-card,
  .contact-card,
  .selected-item {
    break-inside: avoid;
  }
}