/* ============================================================
   FIRM project page
   Layout lineage: Nerfies / academic-project-page template.
   Styling written from scratch (no Bulma dependency).

   THEMES — pick one on the <html> tag in template.html:
       <html lang="en" data-theme="cream">   warm paper, light hero
       <html lang="en" data-theme="gray">    neutral graphite
       <html lang="en" data-theme="teal">    original ocean gradient
   Preview any theme without editing: add ?theme=gray to the URL.
   To make your own, copy a theme block below and change the values.
   ============================================================ */

/* ---------- theme: cream ---------- */
[data-theme="cream"] {
  --bg-top:        #fbf8f1;
  --bg-bottom:     #f2eadb;
  --surface:       #fffdf8;
  --ink:           #2b2620;
  --ink-soft:      #6a5e50;
  --ink-faint:     #9a8e7e;
  --rule:          #e6dac6;
  --rule-strong:   #d9cab1;
  --card:          rgba(255, 252, 245, 0.9);
  --card-border:   rgba(255, 255, 255, 0.7);
  --shadow:        60 44 24;             /* r g b, used with alpha */

  --accent:        #8a5a3b;
  --accent-2:      #c08a5c;
  --on-accent:     #fffaf2;

  --hero-1: #f6eddd;  --hero-2: #f1e4cc;  --hero-3: #ecdcbf;  --hero-4: #e6d1b0;
  --hero-glow-1:   rgba(255, 255, 255, 0.65);
  --hero-glow-2:   rgba(214, 170, 120, 0.28);
  --hero-glow-3:   rgba(160, 110, 70, 0.14);
  --hero-text:     #2b2620;
  --hero-sub:      #8a5a3b;
  --hero-muted:    #74685a;
  --hero-link:     #2b2620;
  --hero-link-hover: #8a5a3b;
  --hero-shadow:   none;
  --btn-bg:        rgba(43, 38, 32, 0.88);
  --btn-bg-hover:  rgba(43, 38, 32, 1);
  --btn-border:    rgba(43, 38, 32, 0.9);
  --btn-text:      #fbf5ea;

  --badge-1: #8a5a3b; --badge-2: #a86f47; --badge-3: #c08a5c;
  --badge-ink:     #fffaf2;
  --badge-glow:    192 138 92;

  --dark-1: #2e2721;  --dark-2: #362e27;  --dark-3: #43392f;
  --on-dark:       #fbf5ea;
  --dark-text:     #eadfcd;
  --dark-muted:    #b8a892;
  --dark-title:    #e7bd8f;
  --dark-kw:       #f0c27a;

  --tint-1: #f7f0e3;  --tint-2: #f1e7d5;  --tint-border: #e2d3ba;
  --stripe:        rgba(138, 90, 59, 0.035);
  --sticky:        #fffcf6;
  --sticky-alt:    #faf5ec;
  --ours-row:      rgba(192, 138, 92, 0.12);
  --ours-sticky:   #f6ebdc;
  --note-bg:       #fbf3e2;
  --note-border:   #ead7b4;
  --footer-1: #f3ecdf; --footer-2: #ebe1d0;

  --best:          #1d4ed8;
  --second:        #c62a3d;
}

/* ---------- theme: gray ---------- */
:root,
[data-theme="gray"] {
  --bg-top:        #f7f7f8;
  --bg-bottom:     #ebebed;
  --surface:       #ffffff;
  --ink:           #1d1f23;
  --ink-soft:      #555a62;
  --ink-faint:     #8a8f97;
  --rule:          #e1e2e5;
  --rule-strong:   #cfd1d5;
  --card:          rgba(255, 255, 255, 0.9);
  --card-border:   rgba(255, 255, 255, 0.7);
  --shadow:        20 22 26;

  --accent:        #3c4450;
  --accent-2:      #6e7784;
  --on-accent:     #ffffff;

  --hero-1: #17191c;  --hero-2: #23262a;  --hero-3: #2f3338;  --hero-4: #3d4248;
  --hero-glow-1:   rgba(255, 255, 255, 0.07);
  --hero-glow-2:   rgba(180, 188, 200, 0.10);
  --hero-glow-3:   rgba(255, 255, 255, 0.05);
  --hero-text:     #f2f3f5;
  --hero-sub:      #b9bec6;
  --hero-muted:    #9aa0a8;
  --hero-link:     #e6e8eb;
  --hero-link-hover: #ffffff;
  --hero-shadow:   0 2px 14px rgba(0, 0, 0, 0.35);
  --btn-bg:        rgba(255, 255, 255, 0.08);
  --btn-bg-hover:  rgba(255, 255, 255, 0.16);
  --btn-border:    rgba(255, 255, 255, 0.18);
  --btn-text:      #f2f3f5;

  --badge-1: #e9eaec; --badge-2: #d6d8dc; --badge-3: #f4f4f6;
  --badge-ink:     #1d1f23;
  --badge-glow:    220 222 226;

  --dark-1: #1c1e22;  --dark-2: #24272c;  --dark-3: #2e3238;
  --on-dark:       #f2f3f5;
  --dark-text:     #d6d9de;
  --dark-muted:    #969ba3;
  --dark-title:    #f2f3f5;
  --dark-kw:       #e3c38a;

  --tint-1: #f4f4f6;  --tint-2: #ececef;  --tint-border: #d9dbdf;
  --stripe:        rgba(20, 22, 26, 0.025);
  --sticky:        #ffffff;
  --sticky-alt:    #f8f8f9;
  --ours-row:      rgba(60, 68, 80, 0.07);
  --ours-sticky:   #eeeff1;
  --note-bg:       #f5f5f6;
  --note-border:   #dcdde0;
  --footer-1: #efeff1; --footer-2: #e6e6e9;

  --best:          #1d4ed8;
  --second:        #c62a3d;
}

/* ---------- theme: teal (original) ---------- */
[data-theme="teal"] {
  --bg-top:        #f7f9fc;
  --bg-bottom:     #eaf0f6;
  --surface:       #ffffff;
  --ink:           #16202b;
  --ink-soft:      #46586b;
  --ink-faint:     #7b8b9c;
  --rule:          #e2e8f0;
  --rule-strong:   #cfdce3;
  --card:          rgba(255, 255, 255, 0.86);
  --card-border:   rgba(255, 255, 255, 0.6);
  --shadow:        16 32 42;

  --accent:        #0e6f88;
  --accent-2:      #14a89a;
  --on-accent:     #ffffff;

  --hero-1: #081722;  --hero-2: #0c2c3e;  --hero-3: #0e4f60;  --hero-4: #157a6e;
  --hero-glow-1:   rgba(32, 201, 180, 0.30);
  --hero-glow-2:   rgba(56, 143, 214, 0.28);
  --hero-glow-3:   rgba(224, 160, 44, 0.16);
  --hero-text:     #eef4f6;
  --hero-sub:      #a9d8d5;
  --hero-muted:    #9fbac1;
  --hero-link:     #dfe9ec;
  --hero-link-hover: #e0a02c;
  --hero-shadow:   0 2px 14px rgba(0, 0, 0, 0.28);
  --btn-bg:        rgba(255, 255, 255, 0.11);
  --btn-bg-hover:  rgba(255, 255, 255, 0.2);
  --btn-border:    rgba(255, 255, 255, 0.2);
  --btn-text:      #f2f7f8;

  --badge-1: #e8b355; --badge-2: #d2932f; --badge-3: #f3d08a;
  --badge-ink:     #10202a;
  --badge-glow:    240 180 68;

  --dark-1: #0d2230;  --dark-2: #0f3644;  --dark-3: #10515c;
  --on-dark:       #ffffff;
  --dark-text:     #d9e7ea;
  --dark-muted:    #a8ccd4;
  --dark-title:    #7fd8cd;
  --dark-kw:       #f0b657;

  --tint-1: #f2f7f9;  --tint-2: #e9f1f4;  --tint-border: #d7e4e9;
  --stripe:        rgba(14, 111, 136, 0.03);
  --sticky:        #fbfdfe;
  --sticky-alt:    #f5fafb;
  --ours-row:      rgba(20, 168, 154, 0.09);
  --ours-sticky:   #e8f7f5;
  --note-bg:       #fff8e8;
  --note-border:   #f0dcb0;
  --footer-1: #eef2f6; --footer-2: #e5ebf1;

  --best:          #1d4ed8;
  --second:        #c62a3d;
}

:root { --maxw: 980px; --maxw-wide: 1180px; }

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: 'Noto Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  font-size: 16px;
  line-height: 1.65;
  color: var(--ink);
  background: linear-gradient(180deg, var(--bg-top) 0%, var(--bg-bottom) 100%);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-2); }

.container   { max-width: var(--maxw);      margin: 0 auto; padding: 0 1.25rem; }
.container.wide { max-width: var(--maxw-wide); }
.section     { padding: 2.25rem 0; }
.narrow      { max-width: 800px; margin: 0 auto; }
.center      { text-align: center; }
.justify     { text-align: justify; hyphens: auto; }

/* ---------- hero ---------- */

.hero {
  position: relative;
  overflow: hidden;
  padding: 3.5rem 0 3rem;
  background: linear-gradient(135deg, var(--hero-1) 0%, var(--hero-2) 32%, var(--hero-3) 64%, var(--hero-4) 100%);
  color: var(--hero-text);
}
.hero::before {
  content: "";
  position: absolute; inset: -12%;
  background:
    radial-gradient(38% 45% at 18% 22%, var(--hero-glow-1), transparent 62%),
    radial-gradient(42% 48% at 82% 30%, var(--hero-glow-2), transparent 64%),
    radial-gradient(46% 50% at 50% 96%, var(--hero-glow-3), transparent 62%);
  animation: drift 14s ease-in-out infinite alternate;
  pointer-events: none;
}
@keyframes drift {
  from { transform: translate(-2%, 1.5%) rotate(-0.6deg) scale(1.02); }
  to   { transform: translate(2.5%, -1.5%) rotate(0.8deg) scale(1.06); }
}
.hero .container { position: relative; z-index: 1; }

.publication-title {
  font-family: 'Google Sans', 'Noto Sans', sans-serif;
  font-size: clamp(1.55rem, 4.4vw, 2.85rem);
  font-weight: 700;
  line-height: 1.18;
  letter-spacing: -0.015em;
  margin: 0 0 0.35rem;
  text-shadow: var(--hero-shadow);
}
.publication-subtitle {
  font-family: 'Google Sans', 'Noto Sans', sans-serif;
  font-size: clamp(0.95rem, 2.1vw, 1.2rem);
  font-weight: 400;
  color: var(--hero-sub);
  margin: 0 0 1.4rem;
}
.publication-authors {
  font-family: 'Google Sans', 'Noto Sans', sans-serif;
  font-size: 1.05rem;
  margin-bottom: 0.4rem;
}
.author-block { display: inline-block; margin: 0 0.15rem; }
.author-block a { color: var(--hero-link); border-bottom: 1px solid color-mix(in srgb, var(--hero-link) 35%, transparent); }
.author-block a:hover { color: var(--hero-link-hover); border-bottom-color: var(--hero-link-hover); }
.affiliations { font-size: 0.98rem; color: var(--hero-muted); margin-bottom: 0.5rem; }
.affiliations .author-block { margin: 0 0.6rem; }

.badge {
  display: inline-block;
  padding: 0.34rem 1.1rem;
  border-radius: 30px;
  background: linear-gradient(135deg, var(--badge-1), var(--badge-2), var(--badge-3));
  color: var(--badge-ink);
  font-weight: 700;
  font-size: 0.8rem;
  letter-spacing: 1.6px;
  text-transform: uppercase;
  animation: pulse-glow 3.2s ease-in-out infinite;
}
@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 0 0 rgb(var(--badge-glow) / 0.42); }
  50%      { box-shadow: 0 0 0 12px rgb(var(--badge-glow) / 0); }
}

.publication-links {
  display: flex; flex-wrap: wrap; justify-content: center;
  gap: 0.7rem; margin-top: 1.5rem;
}
.link-button {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.55rem 1.25rem;
  border-radius: 40px;
  background: var(--btn-bg);
  border: 1px solid var(--btn-border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  color: var(--btn-text);
  font-family: 'Google Sans', 'Noto Sans', sans-serif;
  font-size: 0.95rem; font-weight: 500;
  transition: transform 0.25s ease, background 0.25s ease, box-shadow 0.25s ease;
}
.link-button:hover {
  color: var(--btn-text);
  background: var(--btn-bg-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 22px rgb(var(--shadow) / 0.26);
}
.link-button.disabled { opacity: 0.5; cursor: not-allowed; }
.link-button.disabled:hover { transform: none; box-shadow: none; background: var(--btn-bg); }

/* ---------- cards & headings ---------- */

.card {
  background: var(--card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--card-border);
  border-radius: 20px;
  padding: 2rem 2.25rem 1.75rem;
  box-shadow: 0 1px 2px rgb(var(--shadow) / 0.05), 0 14px 38px rgb(var(--shadow) / 0.07);
  transition: box-shadow 0.4s ease, transform 0.4s ease;
}
.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 2px 4px rgb(var(--shadow) / 0.06), 0 20px 46px rgb(var(--shadow) / 0.11);
}

h2.title {
  font-family: 'Google Sans', 'Noto Sans', sans-serif;
  font-size: 1.6rem; font-weight: 700;
  margin: 0 0 1.1rem;
  text-align: center;
  color: var(--ink);
}
h2.title::after {
  content: "";
  display: block;
  width: 64px; height: 3px; margin: 0.6rem auto 0;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
}
h3.subtitle {
  font-family: 'Google Sans', 'Noto Sans', sans-serif;
  font-size: 1.1rem; font-weight: 600;
  margin: 2rem 0 0.6rem;
  padding-left: 0.7rem;
  border-left: 3px solid var(--accent);
}
h3.subtitle:first-child { margin-top: 0; }

p { margin: 0 0 1rem; }
p:last-child { margin-bottom: 0; }

.caption {
  font-size: 0.88rem;
  line-height: 1.6;
  color: var(--ink-soft);
  text-align: justify;
  margin: 0.9rem auto 0;
  max-width: 860px;
}
.caption b, .caption strong { color: var(--ink); }

figure { margin: 0; }
figure img { display: block; max-width: 100%; height: auto; margin: 0 auto; border-radius: 10px; }

/* ---------- teaser ---------- */

.teaser { padding: 2.25rem 0 0.5rem; }
.teaser-wrapper {
  display: inline-block;
  width: 100%;
  border-radius: 16px;
  overflow: hidden;
  background: #fff;
  box-shadow: 0 18px 44px rgb(var(--shadow) / 0.16);
  cursor: zoom-in;
  transition: transform 0.4s ease, box-shadow 0.4s ease;
}
.teaser-wrapper:hover { transform: translateY(-6px); box-shadow: 0 24px 56px rgb(var(--shadow) / 0.22); }
.teaser-wrapper img { display: block; width: 100%; filter: blur(0.6px); transition: filter 0.5s ease; }

#lightbox {
  display: none;
  position: fixed; inset: 0; z-index: 9999;
  background: rgba(10, 10, 12, 0.92);
  align-items: center; justify-content: center;
  padding: 2rem; cursor: zoom-out;
}
#lightbox img { max-width: 96%; max-height: 92%; border-radius: 8px; }
#lightbox .hint {
  position: absolute; bottom: 1.1rem; left: 0; right: 0;
  text-align: center; color: #a9adb3; font-size: 0.82rem;
}

/* ---------- highlight stats ---------- */

.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 1rem;
  margin-top: 1.75rem;
}
.stat {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  padding: 1.25rem 1rem;
  text-align: center;
  box-shadow: 0 10px 26px rgb(var(--shadow) / 0.07);
}
.stat .num {
  font-family: 'Google Sans', 'Noto Sans', sans-serif;
  font-size: 1.85rem; font-weight: 700; line-height: 1.1;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.stat .lab { font-size: 0.82rem; color: var(--ink-soft); margin-top: 0.3rem; }

/* ---------- method diagram ---------- */

.diagram { width: 100%; overflow-x: auto; padding: 0.5rem 0 0.25rem; }
.diagram svg { display: block; margin: 0 auto; min-width: 720px; max-width: 100%; height: auto; }

.eq-card {
  background: linear-gradient(135deg, var(--tint-1), var(--tint-2));
  border: 1px solid var(--tint-border);
  border-left: 3px solid var(--accent);
  border-radius: 12px;
  padding: 0.6rem 1.1rem;
  margin: 1.1rem 0;
  overflow-x: auto;
}

/* ---------- algorithm blocks ---------- */

.algo-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.1rem;
  margin-top: 1.25rem;
}
.algo {
  background: linear-gradient(135deg, var(--dark-1), var(--dark-2) 60%, var(--dark-3));
  color: var(--dark-text);
  border-radius: 14px;
  padding: 1.1rem 1.25rem;
  font-size: 0.83rem;
  line-height: 1.85;
  overflow-x: auto;
}
.algo .algo-name {
  font-family: 'Google Sans', 'Noto Sans', sans-serif;
  font-weight: 700; font-size: 0.95rem;
  color: var(--dark-title);
  display: block;
  margin-bottom: 0.5rem;
  padding-bottom: 0.45rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
}
.algo code { font-family: 'SFMono-Regular', Menlo, Consolas, monospace; white-space: nowrap; }
.algo .kw { color: var(--dark-kw); }
.algo .cm { color: var(--dark-muted); font-style: italic; }

/* ---------- tabs ---------- */

.tabs {
  display: flex; flex-wrap: wrap; justify-content: center;
  gap: 0.5rem;
  margin: 1.4rem auto 1.5rem;
}
.tab {
  font-family: 'Google Sans', 'Noto Sans', sans-serif;
  font-size: 0.88rem; font-weight: 500;
  padding: 0.5rem 1.1rem;
  border: 1px solid var(--rule-strong);
  border-radius: 50px;
  background: var(--surface);
  color: var(--ink-soft);
  cursor: pointer;
  display: inline-flex; align-items: center; gap: 0.45rem;
  transition: all 0.22s ease;
}
.tab:hover { border-color: var(--accent); color: var(--accent); }
.tab.active {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  border-color: transparent;
  color: var(--on-accent);
  box-shadow: 0 6px 16px color-mix(in srgb, var(--accent) 30%, transparent);
}
.panel { display: none; }
.panel.active { display: block; animation: fadeSlide 0.38s ease; }
@keyframes fadeSlide {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: none; }
}

/* ---------- tables ---------- */

.table-scroll { width: 100%; overflow-x: auto; -webkit-overflow-scrolling: touch; }
table.results {
  border-collapse: collapse;
  margin: 0 auto;
  font-size: 0.74rem;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
table.results.compact { font-size: 0.85rem; }
table.results th, table.results td { padding: 0.28rem 0.5rem; text-align: center; }
table.results thead th {
  font-family: 'Google Sans', 'Noto Sans', sans-serif;
  font-weight: 600; color: var(--ink-soft);
}
table.results thead tr.groups th {
  border-bottom: 1px solid var(--rule);
  color: var(--ink);
  font-size: 0.82rem;
  padding-bottom: 0.35rem;
}
table.results thead tr.metrics th { font-size: 0.7rem; padding-bottom: 0.4rem; }
table.results thead tr.metrics { border-bottom: 1.5px solid var(--ink); }
table.results tbody td:first-child,
table.results tbody th:first-child {
  text-align: left;
  font-weight: 500;
  position: sticky; left: 0;
  background: var(--sticky);
  padding-right: 0.9rem;
}
table.results tbody tr:nth-child(even) td { background: var(--stripe); }
table.results tbody tr:nth-child(even) td:first-child { background: var(--sticky-alt); }
table.results tbody tr.sep-top td { border-top: 1px solid var(--rule); }
table.results tbody tr.ours td { background: var(--ours-row); }
table.results tbody tr.ours td:first-child { background: var(--ours-sticky); font-weight: 700; }
table.results tbody tr.degraded td { color: var(--ink-faint); }
table.results td.best   { color: var(--best);   font-weight: 700; }
table.results td.second { color: var(--second); font-weight: 700; }
.legend { font-size: 0.78rem; color: var(--ink-faint); text-align: center; margin-top: 0.75rem; }
.legend .sw-best   { color: var(--best);   font-weight: 700; }
.legend .sw-second { color: var(--second); font-weight: 700; }
.muted { color: var(--ink-faint); }

/* ---------- bibtex ---------- */

.bibtex-wrapper { position: relative; }
.bibtex-copy-btn {
  position: absolute; top: 0.85rem; right: 0.85rem;
  display: inline-flex; align-items: center; gap: 0.4rem;
  font-family: 'Google Sans', 'Noto Sans', sans-serif;
  font-size: 0.78rem;
  padding: 0.35rem 0.8rem;
  border-radius: 30px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  background: rgba(255, 255, 255, 0.1);
  color: var(--dark-text);
  cursor: pointer;
  transition: all 0.22s ease;
}
.bibtex-copy-btn:hover { background: rgba(255, 255, 255, 0.2); color: var(--on-dark); }
.bibtex-copy-btn.copied {
  background: color-mix(in srgb, var(--accent-2) 40%, transparent);
  border-color: color-mix(in srgb, var(--accent-2) 70%, transparent);
  color: var(--on-dark);
}
.bibtex-wrapper pre {
  margin: 0;
  background: linear-gradient(135deg, var(--dark-1), var(--dark-2) 60%, var(--dark-3));
  color: var(--dark-text);
  border-radius: 14px;
  padding: 1.6rem 1.7rem;
  overflow-x: auto;
  font-size: 0.82rem;
  line-height: 1.7;
}

/* ---------- misc ---------- */

.fade-in { opacity: 0; transform: translateY(28px); transition: opacity 0.8s ease-out, transform 0.8s ease-out; }
.fade-in.visible { opacity: 1; transform: none; }

.note {
  font-size: 0.85rem;
  color: var(--ink-soft);
  background: var(--note-bg);
  border: 1px solid var(--note-border);
  border-radius: 10px;
  padding: 0.75rem 1rem;
  margin-top: 1.1rem;
}

footer.footer {
  padding: 2.25rem 0 2.75rem;
  background: linear-gradient(180deg, var(--footer-1), var(--footer-2));
  border-top: 1px solid var(--rule);
  color: var(--ink-soft);
  font-size: 0.84rem;
  text-align: center;
}
footer.footer p { max-width: 680px; margin: 0 auto 0.5rem; }

/* ---------- method diagram colours (inline SVG) ---------- */

.diagram .d-box      { fill: var(--surface);  stroke: var(--rule-strong); }
.diagram .d-box-hi   { fill: var(--surface);  stroke: var(--accent-2); stroke-width: 1.6; }
.diagram .d-loop     { fill: var(--tint-1);   stroke: var(--tint-border); }
.diagram .d-darkbox  { fill: var(--dark-1); }
.diagram .d-arrow    { stroke: var(--ink-soft); }
.diagram .d-arrow-a  { stroke: var(--accent); }
.diagram .d-head     { fill: var(--ink-soft); }
.diagram .d-head-a   { fill: var(--accent); }
.diagram .s-accent   { stop-color: var(--accent); }
.diagram .s-accent-2 { stop-color: var(--accent-2); }
.diagram .s-dark-1   { stop-color: var(--dark-1); }
.diagram .s-dark-3   { stop-color: var(--dark-3); }
.diagram .lbl  { font: 500 13px 'Noto Sans', sans-serif; fill: var(--ink); }
.diagram .lblw { font: 500 13px 'Noto Sans', sans-serif; fill: var(--on-dark); }
.diagram .sml  { font: 400 11px 'Noto Sans', sans-serif; fill: var(--ink-soft); }
.diagram .sml-a{ font: 400 11px 'Noto Sans', sans-serif; fill: var(--accent); }
.diagram .smlw { font: 400 11px 'Noto Sans', sans-serif; fill: var(--dark-muted); }
.diagram .smlo { font: 400 11px 'Noto Sans', sans-serif; fill: var(--on-accent); opacity: 0.85; }
.diagram .hd   { font: 700 12px 'Google Sans','Noto Sans',sans-serif; fill: var(--accent); letter-spacing: .08em; }
.diagram .mth  { font: italic 14px 'Times New Roman', serif; fill: var(--ink); }
.diagram .mthw { font: italic 14px 'Times New Roman', serif; fill: var(--on-dark); }
.diagram .mtho { font: italic 14px 'Times New Roman', serif; fill: var(--on-accent); }
.diagram .lblo { font: 500 13px 'Noto Sans', sans-serif; fill: var(--on-accent); }

/* ---------- responsive ---------- */

@media (max-width: 768px) {
  body { font-size: 15px; }
  .hero { padding: 2.5rem 0 2.25rem; }
  .publication-authors { font-size: 0.92rem; }
  .affiliations { font-size: 0.86rem; }
  .affiliations .author-block { display: block; margin: 0.1rem 0; }
  .card { padding: 1.25rem 1.1rem 1.1rem; border-radius: 14px; }
  .card:hover, .teaser-wrapper:hover { transform: none; }
  h2.title { font-size: 1.3rem; }
  h3.subtitle { font-size: 1rem; }
  .tabs { gap: 0.35rem; }
  .tab { font-size: 0.8rem; padding: 0.42rem 0.85rem; }
  .stat .num { font-size: 1.5rem; }
  .bibtex-wrapper pre { font-size: 0.66rem; padding: 1.1rem; }
  .bibtex-copy-btn { top: 0.5rem; right: 0.5rem; font-size: 0.7rem; }
  table.results { font-size: 0.68rem; }
  .diagram svg { min-width: 640px; }
}

@media (max-width: 420px) {
  .publication-links { gap: 0.45rem; }
  .link-button { font-size: 0.85rem; padding: 0.48rem 0.95rem; }
}