/* ═══════════════════════════════════════════════════════════════
   Research Homepage · Yoonjeon Kim · KAIST AI
   Design: minimalist, editorial, frontier-lab aesthetic
   ═══════════════════════════════════════════════════════════════ */

/* ── TOKENS: LIGHT ──────────────────────────────────────────── */
:root {
  --accent:       #4863A0;
  --accent-soft:  rgba(72, 99, 160, 0.07);
  --accent-mid:   rgba(72, 99, 160, 0.18);
  --accent-h:     #3a52870;

  --bg:           #FFFFFF;
  --bg2:          #FAFBFC;
  --section-bg:   #F8F9FA;
  --section-bg2:  #F2F4F7;

  --text:         #1A1C20;
  --text2:        #6C757D;
  --text3:        #ADB5BD;
  --text4:        #CED4DA;

  --border:       #E9ECEF;
  --border-h:     #CED4DA;
  --border-focus: rgba(72, 99, 160, 0.5);

  --sans:  'Satoshi', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --mono:  'IBM Plex Mono', 'JetBrains Mono', ui-monospace, 'Courier New', monospace;

  --nav-h:  52px;
  --max-w:  960px;
  --gap:    72px;
  --r-card: 12px;
  --r-sm:   7px;
  --r-btn:  6px;

  --shadow-card: 0 1px 4px rgba(0,0,0,0.04), 0 4px 16px rgba(0,0,0,0.04);
  --shadow-lift: 0 4px 12px rgba(0,0,0,0.06), 0 12px 32px rgba(0,0,0,0.06);
}

/* ── TOKENS: DARK ───────────────────────────────────────────── */
@media (prefers-color-scheme: dark) {
  :root {
    --accent:       #7B9FE0;
    --accent-soft:  rgba(123, 159, 224, 0.09);
    --accent-mid:   rgba(123, 159, 224, 0.22);

    --bg:           #0F1117;
    --bg2:          #13151E;
    --section-bg:   #161A24;
    --section-bg2:  #1C2030;

    --text:         #E4E6EF;
    --text2:        #8890A8;
    --text3:        #505670;
    --text4:        #343750;

    --border:       #1E2232;
    --border-h:     #2C3250;
    --border-focus: rgba(123, 159, 224, 0.45);

    --shadow-card: 0 1px 4px rgba(0,0,0,0.3), 0 4px 16px rgba(0,0,0,0.2);
    --shadow-lift: 0 4px 12px rgba(0,0,0,0.4), 0 12px 32px rgba(0,0,0,0.3);
  }

  .r-nav.r-nav--solid {
    background: rgba(15, 17, 23, 0.92) !important;
  }

  .r-grid {
    background-image:
      linear-gradient(rgba(123, 159, 224, 0.04) 1px, transparent 1px),
      linear-gradient(90deg, rgba(123, 159, 224, 0.04) 1px, transparent 1px);
  }

  .r-blob {
    background: radial-gradient(circle, rgba(123, 159, 224, 0.06) 0%, transparent 65%);
  }

  .r-photo {
    border-color: var(--border-h);
    filter: grayscale(15%) brightness(0.92);
  }
  .r-photo:hover {
    filter: grayscale(0%) brightness(1);
  }

  .r-tl-item::before {
    border-color: var(--bg);
  }

  .r-abs-body.open {
    background: var(--section-bg);
  }
}

/* ── RESET ──────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 20px);
}

body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  font-size: 22px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  transition: background 0.3s, color 0.3s;
}

::selection {
  background: var(--accent-mid);
  color: var(--text);
}

/* ── FOCUS ──────────────────────────────────────────────────── */
:focus-visible {
  outline: 2px solid var(--border-focus);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ── AMBIENT BACKGROUND ─────────────────────────────────────── */
.r-grid {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(72, 99, 160, 0.034) 1px, transparent 1px),
    linear-gradient(90deg, rgba(72, 99, 160, 0.034) 1px, transparent 1px);
  background-size: 52px 52px;
  pointer-events: none;
  z-index: 0;
}

.r-blob {
  position: fixed;
  top: -240px;
  right: -240px;
  width: 680px;
  height: 680px;
  background: radial-gradient(circle at center, rgba(72, 99, 160, 0.055) 0%, transparent 62%);
  filter: blur(64px);
  pointer-events: none;
  z-index: 0;
}

/* ── NAV ────────────────────────────────────────────────────── */
.r-nav {
  position: sticky;
  top: 0;
  height: var(--nav-h);
  z-index: 50;
  border-bottom: 1px solid transparent;
  transition: background 0.28s, border-color 0.28s;
}

.r-nav.r-nav--solid {
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-color: var(--border);
}

.r-nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.r-nav-brand {
  font-family: var(--mono);
  font-size: 14.5px;
  font-weight: 500;
  color: var(--text3);
  letter-spacing: .14em;
  text-decoration: none;
  transition: color 0.2s;
}
.r-nav-brand:hover { color: var(--text2); }

.r-nav-links {
  display: flex;
  gap: 24px;
  list-style: none;
}

.r-nav-links a {
  font-size: 16.5px;
  color: var(--text2);
  text-decoration: none;
  letter-spacing: .02em;
  position: relative;
  transition: color 0.2s;
}

.r-nav-links a::after {
  content: '';
  position: absolute;
  left: 0; bottom: -3px;
  width: 0; height: 1px;
  background: var(--accent);
  transition: width 0.22s ease;
}

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

.r-nav-links a:hover::after,
.r-nav-links a.active::after { width: 100%; }

/* ── LAYOUT ─────────────────────────────────────────────────── */
.r-main {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px 96px;
  position: relative;
  z-index: 1;
}

/* ── FADE ANIMATION ─────────────────────────────────────────── */
.r-fade {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.54s ease, transform 0.54s ease;
}
.r-fade.in { opacity: 1; transform: none; }

/* ── HERO ───────────────────────────────────────────────────── */
.r-hero {
  padding: 72px 0 60px;
  display: flex;
  align-items: flex-start;
  gap: 28px;
}

.r-photo-wrap { flex-shrink: 0; }

.r-photo {
  width: 182px;
  height: 182px;
  border-radius: var(--r-card);
  object-fit: cover;
  border: 1px solid var(--border);
  display: block;
  filter: grayscale(20%);
  box-shadow: var(--shadow-card);
  transition: filter 0.4s ease, box-shadow 0.4s ease, transform 0.3s ease;
}

.r-photo:hover {
  filter: grayscale(0%);
  box-shadow: var(--shadow-lift);
  transform: scale(1.02);
}

.r-hero-text { flex: 1; padding-top: 4px; }

.r-name {
  font-size: 33px;
  font-weight: 700;
  letter-spacing: -.035em;
  color: var(--text);
  line-height: 1.18;
  margin-bottom: 10px;
}

.r-tagline {
  font-size: 20px;
  color: var(--text2);
  line-height: 1.72;
  margin-bottom: 10px;
}

.r-tagline em    { font-style: normal; color: var(--accent); font-weight: 500; }
.r-tagline a     { color: var(--text); border-bottom: 1px solid var(--border-h); transition: border-color 0.2s; }
.r-tagline a:hover { border-color: var(--accent); }

.r-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--text3);
  letter-spacing: .04em;
  margin-bottom: 18px;
}

.r-status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #22c55e;
  box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.2);
  flex-shrink: 0;
  animation: pulse 2.4s ease infinite;
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.2); }
  50%       { box-shadow: 0 0 0 5px rgba(34, 197, 94, 0.08); }
}

.r-social { display: flex; flex-wrap: wrap; gap: 5px; list-style: none; }

.r-social a {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 4px 10px;
  border-radius: var(--r-btn);
  border: 1px solid var(--border);
  color: var(--text2);
  text-decoration: none;
  font-family: var(--mono);
  font-size: 14.5px;
  letter-spacing: .03em;
  transition: border-color 0.2s, color 0.2s, background 0.2s, transform 0.15s;
}

.r-social a:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-soft);
  transform: translateY(-1px);
  opacity: 1;
}

.r-social a i { font-size: 12px; }

/* ── SECTION ────────────────────────────────────────────────── */
.r-section {
  padding-top: var(--gap);
  border-top: 1px solid var(--border);
}

.r-section-head { margin-bottom: 28px; }

.r-label {
  font-family: var(--mono);
  font-size: 19.5px;
  font-weight: 500;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--text3);
}

.r-sub-head {
  margin: 44px 0 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

/* ── SHARED LINK PILL ───────────────────────────────────────── */
.r-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 500;
  color: var(--text2);
  text-decoration: none;
  padding: 3px 9px;
  border-radius: var(--r-btn);
  border: 1px solid var(--border);
  letter-spacing: .025em;
  white-space: nowrap;
  transition: color 0.2s, border-color 0.2s, background 0.2s, transform 0.15s;
}

.r-link:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-soft);
  transform: translateY(-1px);
  opacity: 1;
}

/* ── VENUE BADGE ────────────────────────────────────────────── */
.r-badge {
  font-family: var(--mono);
  font-size: 12.5px;
  font-weight: 500;
  letter-spacing: .08em;
  padding: 2px 7px;
  border-radius: 4px;
  border: 1px solid;
  white-space: nowrap;
  flex-shrink: 0;
}

.r-badge-conf   { color: var(--accent);  background: var(--accent-soft);           border-color: rgba(72, 99, 160, 0.25); }
.r-badge-pre    { color: #9A7828;        background: rgba(200, 155, 50, 0.08);     border-color: rgba(200, 155, 50, 0.25); }
.r-badge-review { color: var(--text3);   background: transparent;                  border-color: var(--border-h); }
.r-badge-journal { color: #5A8A6A;       background: rgba(80, 160, 100, 0.07);    border-color: rgba(80, 160, 100, 0.24); }

@media (prefers-color-scheme: dark) {
  .r-badge-conf    { color: var(--accent); background: var(--accent-soft); border-color: rgba(123,159,224,0.28); }
  .r-badge-pre     { color: #C8A855; background: rgba(200,168,85,0.1); border-color: rgba(200,168,85,0.28); }
  .r-badge-review  { color: var(--text3); border-color: var(--border-h); }
  .r-badge-journal { color: #6DB890; background: rgba(109,184,144,0.09); border-color: rgba(109,184,144,0.26); }
}

/* ── ABSTRACT TOGGLE ────────────────────────────────────────── */
.r-abs-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-family: var(--mono);
  font-size: 14px;
  color: var(--text3);
  background: none;
  border: none;
  cursor: pointer;
  padding: 3px 0;
  letter-spacing: .04em;
  transition: color 0.2s;
  user-select: none;
}

.r-abs-btn:hover { color: var(--text2); }
.r-abs-btn.open  { color: var(--accent); }

.r-abs-body {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  font-size: 19.5px;
  color: var(--text2);
  line-height: 1.8;
  border-radius: 0 0 var(--r-sm) var(--r-sm);
  transition:
    max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1),
    opacity    0.36s ease,
    margin-top 0.3s ease,
    padding    0.3s ease;
}

.r-abs-body.open {
  max-height: 800px;
  opacity: 1;
  margin-top: 14px;
  padding: 14px 16px;
  background: var(--section-bg);
  border-radius: var(--r-sm);
  border: 1px solid var(--border);
}

/* ── SELECTED RESEARCH CARDS ────────────────────────────────── */
.r-cards { display: flex; flex-direction: column; gap: 14px; }

.r-card {
  background: var(--section-bg);
  border: 1px solid var(--border);
  border-radius: var(--r-card);
  padding: 22px 24px;
  position: relative;
  overflow: hidden;
  transition: border-color 0.24s, transform 0.24s, box-shadow 0.24s;
  box-shadow: var(--shadow-card);
}

.r-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 3px; height: 100%;
  background: var(--accent);
  opacity: 0;
  transition: opacity 0.24s;
  border-radius: var(--r-card) 0 0 var(--r-card);
}

.r-card:hover {
  border-color: var(--border-h);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lift);
}

.r-card:hover::before { opacity: 1; }

.r-card-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 11px;
}

.r-card-year {
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--text3);
  letter-spacing: .04em;
}

.r-card-title {
  font-size: 23.5px;
  font-weight: 600;
  color: var(--text);
  line-height: 1.42;
  letter-spacing: -.018em;
  margin-bottom: 8px;
}

.r-card-summary {
  font-size: 19.5px;
  color: var(--text2);
  line-height: 1.7;
  margin-bottom: 13px;
}

.r-card-authors {
  font-size: 18px;
  color: var(--text3);
  margin-bottom: 15px;
  line-height: 1.5;
}

.r-card-authors strong { color: var(--text2); font-weight: 500; }

.r-card-footer {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
}

/* ── PUBLICATIONS LIST ──────────────────────────────────────── */
.r-pub-list { display: flex; flex-direction: column; }

.r-pub {
  padding: 20px 0;
  border-bottom: 1px solid var(--border);
  transition: padding-left 0.2s;
}

.r-pub:first-child { border-top: 1px solid var(--border); }
.r-pub:hover { padding-left: 6px; }

.r-pub-title {
  font-size: 21.5px;
  font-weight: 500;
  color: var(--text);
  line-height: 1.46;
  letter-spacing: -.012em;
  margin-bottom: 5px;
}

.r-pub-authors {
  font-size: 18px;
  color: var(--text3);
  line-height: 1.5;
  margin-bottom: 9px;
}

.r-pub-authors strong { color: var(--text2); font-weight: 500; }

.r-pub-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
}

/* ── NEWS ───────────────────────────────────────────────────── */
.r-news { display: flex; flex-direction: column; }

.r-news-item {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 16px;
  align-items: baseline;
  padding: 11px 0;
  border-bottom: 1px solid var(--border);
}

.r-news-item:last-child { border-bottom: none; }

.r-news-date {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text3);
  letter-spacing: .05em;
  padding-top: 1px;
}

.r-news-text {
  font-size: 20px;
  color: var(--text2);
  line-height: 1.58;
}

.r-news-text a { color: var(--accent); text-decoration: none; }
.r-news-text a:hover { opacity: 0.76; }
.r-news-text strong { color: var(--text); font-weight: 600; }

/* ── TALKS ──────────────────────────────────────────────────── */
.r-talks { display: flex; flex-direction: column; gap: 10px; }

.r-talk {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px 18px;
  background: var(--section-bg);
  border: 1px solid var(--border);
  border-radius: var(--r-card);
  box-shadow: var(--shadow-card);
  transition: border-color 0.22s, transform 0.22s, box-shadow 0.22s;
}

.r-talk:hover {
  border-color: var(--border-h);
  transform: translateY(-1px);
  box-shadow: var(--shadow-lift);
}

.r-talk-icon {
  width: 34px; height: 34px;
  flex-shrink: 0;
  border-radius: var(--r-sm);
  background: var(--accent-soft);
  border: 1px solid var(--accent-mid);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-size: 15px;
}

.r-talk-body { flex: 1; }

.r-talk-title {
  font-size: 20px;
  font-weight: 500;
  color: var(--text);
  margin-bottom: 5px;
  line-height: 1.42;
}

.r-talk-meta {
  font-size: 14px;
  color: var(--text3);
  font-family: var(--mono);
  margin-bottom: 5px;
  letter-spacing: .02em;
}

.r-talk-link {
  font-family: var(--mono);
  font-size: 14px;
  color: var(--accent);
  text-decoration: none;
  letter-spacing: .03em;
  transition: opacity 0.2s;
}

.r-talk-link:hover { opacity: 0.72; }

/* ── PROJECTS ───────────────────────────────────────────────── */
.r-proj-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.r-proj {
  padding: 16px 18px;
  background: var(--section-bg);
  border: 1px solid var(--border);
  border-radius: var(--r-card);
  box-shadow: var(--shadow-card);
  transition: border-color 0.22s, transform 0.22s, box-shadow 0.22s;
}

.r-proj:hover {
  border-color: var(--border-h);
  transform: translateY(-1px);
  box-shadow: var(--shadow-lift);
}

.r-proj-funder {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--text3);
  margin-bottom: 6px;
}

.r-proj-name {
  font-size: 19.5px;
  font-weight: 500;
  color: var(--text);
  line-height: 1.44;
  margin-bottom: 7px;
}

.r-proj-period {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text3);
  letter-spacing: .03em;
}

/* ── EXPERIENCE TIMELINE ────────────────────────────────────── */
.r-timeline {
  border-left: 1px solid var(--border);
  padding-left: 26px;
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.r-tl-item { position: relative; }

.r-tl-item::before {
  content: '';
  position: absolute;
  left: -30px;
  top: 7px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--bg);
  box-shadow: 0 0 0 2px var(--accent-mid);
  transition: box-shadow 0.2s;
}

.r-tl-item:hover::before {
  box-shadow: 0 0 0 4px var(--accent-soft);
}

.r-tl-date {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text3);
  letter-spacing: .05em;
  margin-bottom: 3px;
}

.r-tl-org {
  font-size: 22px;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -.015em;
  margin-bottom: 1px;
}

.r-tl-role {
  font-size: 19.5px;
  color: var(--text2);
  margin-bottom: 8px;
}

.r-tl-detail {
  font-size: 19px;
  color: var(--text3);
  line-height: 1.64;
}

.r-tl-detail a { color: var(--accent); text-decoration: none; }
.r-tl-detail a:hover { opacity: 0.76; }

.r-tl-sub { list-style: none; margin-top: 7px; }

.r-tl-sub li {
  font-size: 19px;
  color: var(--text3);
  padding: 2px 0 2px 16px;
  position: relative;
  line-height: 1.55;
}

.r-tl-sub li::before {
  content: '↳';
  position: absolute;
  left: 0;
  color: var(--text4);
  font-size: 12.5px;
}

/* ── EDUCATION ──────────────────────────────────────────────── */
.r-edu-list { display: flex; flex-direction: column; gap: 20px; }

.r-edu-item { display: flex; gap: 14px; align-items: flex-start; }

.r-edu-deg {
  font-family: var(--mono);
  font-size: 12.5px;
  font-weight: 500;
  color: var(--accent);
  min-width: 36px;
  padding-top: 2px;
  letter-spacing: .04em;
  flex-shrink: 0;
}

.r-edu-inst {
  font-size: 20px;
  font-weight: 600;
  color: var(--text);
  line-height: 1.3;
  letter-spacing: -.01em;
}

.r-edu-dept {
  font-size: 19px;
  color: var(--text2);
  margin-top: 2px;
}

.r-edu-period {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text3);
  margin-top: 4px;
  letter-spacing: .04em;
}

/* ── SERVICE ────────────────────────────────────────────────── */
.r-service { margin-top: 40px; }

.r-service-label {
  font-family: var(--mono);
  font-size: 19.5px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--text3);
  margin-bottom: 12px;
}

.r-chips { display: flex; flex-wrap: wrap; gap: 6px; }

.r-chip {
  font-family: var(--mono);
  font-size: 14px;
  padding: 3px 10px;
  border-radius: 5px;
  border: 1px solid var(--border);
  color: var(--text2);
  letter-spacing: .04em;
  background: var(--section-bg);
  transition: border-color 0.2s, color 0.2s;
}

.r-chip:hover { border-color: var(--accent); color: var(--accent); }

/* ── RESEARCH INTERESTS ─────────────────────────────────────── */
.r-interests {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 14px;
}

.r-interest-tag {
  font-family: var(--mono);
  font-size: 12px;
  padding: 3px 10px;
  border-radius: 5px;
  border: 1px solid var(--accent-mid);
  color: var(--accent);
  background: var(--accent-soft);
  letter-spacing: .04em;
}

/* ── FOOTER ─────────────────────────────────────────────────── */
.r-footer {
  border-top: 1px solid var(--border);
  padding: 24px 0;
  position: relative;
  z-index: 1;
  background: var(--bg2);
}

.r-footer-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text3);
  letter-spacing: .05em;
}

/* ── GLOBAL ─────────────────────────────────────────────────── */
a { color: var(--accent); text-decoration: none; transition: opacity 0.2s; }
a:hover { opacity: 0.8; }

/* ── BIBTEX ─────────────────────────────────────────────────── */
.r-bib-btn {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-family: var(--mono);
  font-size: 14px;
  color: var(--text3);
  background: none;
  border: none;
  cursor: pointer;
  padding: 3px 0;
  letter-spacing: .04em;
  transition: color 0.2s;
  user-select: none;
}

.r-bib-btn:hover { color: var(--text2); }
.r-bib-btn.open  { color: var(--accent); }

.r-bib-body {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition:
    max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1),
    opacity    0.35s ease,
    margin-top 0.3s ease;
}

.r-bib-body.open {
  max-height: 480px;
  opacity: 1;
  margin-top: 12px;
}

.r-bib-inner {
  background: var(--section-bg2, #F2F4F7);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  padding: 12px 14px;
  overflow: hidden;
}

@media (prefers-color-scheme: dark) {
  .r-bib-inner { background: var(--bg2); }
}

.r-bib-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 9px;
}

.r-bib-label-sm {
  font-family: var(--mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--text3);
}

.r-bib-copy {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--text3);
  background: transparent;
  border: 1px solid var(--border-h);
  border-radius: 4px;
  padding: 2px 9px;
  cursor: pointer;
  letter-spacing: .04em;
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}

.r-bib-copy:hover {
  color: var(--accent);
  border-color: var(--accent);
  background: var(--accent-soft);
}

.r-bib-copy.copied {
  color: #22c55e;
  border-color: rgba(34, 197, 94, 0.4);
  background: rgba(34, 197, 94, 0.07);
}

.r-bib-code {
  font-family: var(--mono);
  font-size: 15px;
  line-height: 1.68;
  color: var(--text2);
  white-space: pre;
  overflow-x: auto;
  display: block;
  scrollbar-width: thin;
  scrollbar-color: var(--border-h) transparent;
}

.r-bib-code::-webkit-scrollbar { height: 4px; }
.r-bib-code::-webkit-scrollbar-track { background: transparent; }
.r-bib-code::-webkit-scrollbar-thumb { background: var(--border-h); border-radius: 2px; }

/* ── PRINT ──────────────────────────────────────────────────── */
@media print {
  .r-nav, .r-grid, .r-blob, .r-social, .r-abs-btn { display: none !important; }
  .r-abs-body { max-height: none !important; opacity: 1 !important; }
  .r-main { padding: 0; }
  body { font-size: 11pt; }
  .r-section { page-break-inside: avoid; }
}

/* ── RESPONSIVE ─────────────────────────────────────────────── */
@media (max-width: 640px) {
  :root { --gap: 56px; --max-w: 100%; }

  .r-hero { flex-direction: column; gap: 18px; padding-top: 48px; }
  .r-photo { width: 64px; height: 64px; }
  .r-name  { font-size: 33px; }

  .r-nav-links li:nth-child(n+5) { display: none; }

  .r-proj-list { grid-template-columns: 1fr; }

  .r-news-item { grid-template-columns: 64px 1fr; gap: 10px; }

  .r-footer-inner { flex-direction: column; gap: 4px; text-align: center; }

  .r-card { padding: 18px 18px; }
}