/* ============================================================
   Wireless Sensing Security — project page
   Palette keyed to the paper: Victim=blue, Weapon=red, Shield=green
   ============================================================ */
:root{
  --ink:        #16181d;
  --ink-soft:   #3a3f4a;
  --ink-mute:   #6b7280;
  --line:       #e6e8ec;
  --line-soft:  #eef0f3;
  --bg:         #ffffff;
  --bg-warm:    #f7f8fa;
  --bg-warm2:   #f1f3f6;

  --victim:     #2f6fb3;
  --victim-bg:  #eaf2fb;
  --weapon:     #c0392b;
  --weapon-bg:  #fbecea;
  --shield:     #2f8f5b;
  --shield-bg:  #e9f6ee;

  --accent:     #1f6feb;
  --ink-hero:   #0c0e14;

  --radius:     16px;
  --radius-sm:  10px;
  --shadow:     0 1px 2px rgba(16,18,29,.04), 0 8px 28px rgba(16,18,29,.06);
  --shadow-lg:  0 24px 60px rgba(16,18,29,.12);

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  --mono:  "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;

  --maxw: 1180px;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;scroll-padding-top:78px;}
html,body{overflow-x:hidden;max-width:100%;}
body{
  margin:0;
  font-family:var(--sans);
  color:var(--ink);
  background:var(--bg);
  line-height:1.62;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
a{color:var(--accent);text-decoration:none;}
img{max-width:100%;display:block;}
sup{font-size:.62em;}

.container{max-width:var(--maxw);margin:0 auto;padding:0 28px;}
.narrow{max-width:820px;}

/* ---------- NAV ---------- */
.nav{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.82);
  backdrop-filter:saturate(160%) blur(12px);
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.nav-inner{
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  display:flex;align-items:center;gap:24px;
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.brand{display:flex;align-items:center;gap:9px;color:var(--ink);font-weight:800;letter-spacing:-.01em;}
.brand-mark{display:grid;place-items:center;color:var(--accent);}
.brand-text{font-size:1.02rem;}
.nav-links{display:flex;gap:4px;margin-left:8px;flex:1;}
.nav-links a{
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.nav-links a:hover{color:var(--ink);background:var(--bg-warm2);}
.nav-cta{display:flex;gap:9px;align-items:center;}

.btn{
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  font-family:var(--sans);font-weight:600;font-size:.9rem;
  padding:9px 16px;border-radius:10px;border:1px solid transparent;
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}
.btn-dark{background:var(--ink);color:#fff;}
.btn-dark:hover{background:#000;transform:translateY(-1px);}
.btn-ghost{color:var(--ink-soft);border-color:var(--line);background:#fff;}
.btn-ghost:hover{border-color:var(--ink-mute);color:var(--ink);}
.btn-primary{background:var(--accent);color:#fff;padding:13px 24px;font-size:.98rem;box-shadow:0 8px 20px rgba(31,111,235,.28);}
.btn-primary:hover{background:#1559c9;transform:translateY(-1px);box-shadow:0 12px 26px rgba(31,111,235,.34);}
.btn-line{background:rgba(255,255,255,.06);color:#e9edf5;border-color:rgba(255,255,255,.22);padding:13px 22px;}
.btn-line:hover{background:rgba(255,255,255,.14);border-color:rgba(255,255,255,.42);}

/* ---------- HERO ---------- */
.hero{position:relative;overflow:hidden;color:#eef1f7;background:var(--ink-hero);}
.hero-bg{
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.hero-bg::after{
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  background-image:
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}
.hero-inner{position:relative;z-index:1;max-width:980px;margin:0 auto;padding:72px 28px 64px;text-align:center;}
.venue-badge{
  display:inline-block;font-size:.78rem;font-weight:600;letter-spacing:.04em;text-transform:uppercase;
  color:#bcd0ee;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.16);
  padding:7px 15px;border-radius:999px;margin-bottom:26px;max-width:100%;
}
.hero-title{
  font-family:var(--serif);font-weight:600;letter-spacing:-.02em;
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}
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}
.kw{font-weight:700;}
.kw-victim{color:#7fb2ee;}
.kw-weapon{color:#ee9189;}
.kw-shield{color:#79d6a0;}

.authors{margin:30px auto 0;max-width:780px;}
.author-line{font-size:1.02rem;color:#e7eaf1;font-weight:500;margin:0 0 6px;line-height:1.7;}
.author-line sup{color:#9fb2d4;}
.affil{font-size:.92rem;color:#aab2c2;margin:2px 0;}
.affil-note{font-size:.82rem;color:#8b93a4;margin-top:4px;}

.hero-actions{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;margin:34px 0 8px;}
.hero-stats{
  list-style:none;display:flex;flex-wrap:wrap;justify-content:center;gap:14px;
  padding:0;margin:42px auto 0;max-width:760px;
}
.hero-stats li{
  flex:1 1 150px;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.12);
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}
.stat-num{display:block;font-family:var(--serif);font-size:1.7rem;font-weight:600;color:#fff;letter-spacing:-.01em;}
.stat-label{display:block;font-size:.8rem;color:#9aa3b4;margin-top:3px;letter-spacing:.02em;}

/* ---------- SECTION SCAFFOLD ---------- */
.section{padding:84px 0;border-bottom:1px solid var(--line-soft);}
.section-abstract{background:var(--bg-warm);}
.eyebrow{
  font-size:.78rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase;
  color:var(--accent);margin-bottom:14px;
}
.section-head{max-width:760px;margin:0 auto 52px;text-align:center;}
.section-head .eyebrow{text-align:center;}
.section h2{
  font-family:var(--serif);font-weight:600;letter-spacing:-.02em;
  font-size:clamp(1.8rem,3.6vw,2.7rem);line-height:1.12;margin:0 0 16px;color:var(--ink);
}
.section-sub{font-size:1.06rem;color:var(--ink-soft);margin:0;}

/* ---------- ABSTRACT ---------- */
.section-abstract .lead{font-size:1.22rem;line-height:1.7;color:var(--ink);}
.section-abstract p{font-size:1.05rem;color:var(--ink-soft);}
.section-abstract .eyebrow{text-align:left;}
.contrib-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin-top:38px;}
.contrib{
  display:flex;gap:14px;align-items:flex-start;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius-sm);padding:18px 20px;box-shadow:var(--shadow);
}
.contrib-no{font-family:var(--serif);font-weight:600;font-size:1.3rem;color:var(--accent);line-height:1;flex-shrink:0;}
.contrib p{margin:0;font-size:.96rem;color:var(--ink-soft);}

/* ---------- MODEL ---------- */
.equation-card{
  max-width:880px;margin:0 auto;background:#fff;border:1px solid var(--line);
  border-radius:var(--radius);box-shadow:var(--shadow-lg);padding:44px 40px 34px;text-align:center;
}
.equation{
  font-family:var(--serif);font-size:clamp(1.7rem,4.4vw,2.9rem);
  display:flex;flex-wrap:wrap;align-items:baseline;justify-content:center;gap:.12em;color:var(--ink);
}
.equation span[data-comp]{
  cursor:pointer;border-radius:8px;padding:0 .08em;transition:.16s;position:relative;
  border-bottom:2px solid transparent;
}
.equation span[data-comp]:hover{background:var(--bg-warm2);}
.eq-x[data-comp].on,.comp-chip[data-comp="x"].on{color:#fff;}
.eq-op,.eq-sum,.eq-paren,.eq-comma{color:var(--ink-mute);}
.eq-sum sub,.equation sub{font-size:.5em;}
.equation .on{color:#fff;}
.eq-x.on{background:var(--victim);}
.eq-h.on{background:var(--shield);}
.eq-theta.on{background:#7a4fb0;}
.eq-n.on{background:var(--weapon);}
.eq-y.on{background:var(--ink);}

.equation-caption{font-size:.98rem;color:var(--ink-soft);max-width:620px;margin:20px auto 0;}
.comp-grid{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin:26px 0 0;}
.comp-chip{
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  background:var(--bg-warm);border:1.5px solid var(--line);border-radius:12px;
  padding:11px 18px;cursor:pointer;transition:.16s;font-family:var(--sans);min-width:96px;
}
.comp-chip:hover{border-color:var(--ink-mute);transform:translateY(-2px);}
.comp-sym{font-family:var(--serif);font-size:1.3rem;color:var(--ink);}
.comp-name{font-size:.74rem;font-weight:600;letter-spacing:.04em;text-transform:uppercase;color:var(--ink-mute);}
.comp-chip[data-comp="x"].on{background:var(--victim);border-color:var(--victim);}
.comp-chip[data-comp="h"].on{background:var(--shield);border-color:var(--shield);}
.comp-chip[data-comp="theta"].on{background:#7a4fb0;border-color:#7a4fb0;}
.comp-chip[data-comp="n"].on{background:var(--weapon);border-color:var(--weapon);}
.comp-chip[data-comp="y"].on{background:var(--ink);border-color:var(--ink);}
.comp-chip.on .comp-sym,.comp-chip.on .comp-name{color:#fff;}

.comp-detail{
  margin-top:26px;text-align:left;background:var(--bg-warm);border:1px solid var(--line);
  border-radius:var(--radius-sm);padding:22px 24px;min-height:120px;
  border-left:4px solid var(--accent);transition:.2s;
}
.comp-detail h4{margin:0 0 6px;font-size:1.12rem;font-family:var(--serif);font-weight:600;display:flex;align-items:center;gap:10px;}
.comp-detail .cd-sym{font-size:1.3rem;color:var(--accent);}
.comp-detail p{margin:0 0 10px;font-size:.98rem;color:var(--ink-soft);}
.comp-detail .cd-roles{display:flex;flex-wrap:wrap;gap:8px;margin-top:8px;}
.cd-role{font-size:.82rem;font-weight:600;padding:5px 11px;border-radius:999px;}
.cd-role.v{background:var(--victim-bg);color:var(--victim);}
.cd-role.w{background:var(--weapon-bg);color:var(--weapon);}
.cd-role.s{background:var(--shield-bg);color:var(--shield);}

/* ---------- ROLES ---------- */
.roles{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-bottom:46px;}
.role-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:28px 26px;box-shadow:var(--shadow);position:relative;overflow:hidden;
  transition:.2s;display:flex;flex-direction:column;
}
.role-card::before{content:"";position:absolute;top:0;left:0;right:0;height:4px;}
.role-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);}
.role-victim::before{background:var(--victim);}
.role-weapon::before{background:var(--weapon);}
.role-shield::before{background:var(--shield);}
.role-top{display:flex;align-items:center;gap:14px;margin-bottom:16px;}
.role-icon{font-size:1.7rem;width:52px;height:52px;display:grid;place-items:center;border-radius:13px;}
.role-victim .role-icon{background:var(--victim-bg);}
.role-weapon .role-icon{background:var(--weapon-bg);}
.role-shield .role-icon{background:var(--shield-bg);}
.role-tag{font-size:.72rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--ink-mute);}
.role-meta h3{margin:2px 0 0;font-family:var(--serif);font-size:1.6rem;font-weight:600;}
.role-victim .role-meta h3{color:var(--victim);}
.role-weapon .role-meta h3{color:var(--weapon);}
.role-shield .role-meta h3{color:var(--shield);}
.role-def{font-size:.97rem;color:var(--ink-soft);margin:0 0 14px;}
.role-formula{
  font-family:var(--mono);font-size:.82rem;color:var(--ink);background:var(--bg-warm);
  border:1px dashed var(--line);border-radius:8px;padding:9px 12px;margin-bottom:16px;
}
.role-list{list-style:none;padding:0;margin:0 0 16px;display:flex;flex-direction:column;gap:9px;flex:1;}
.role-list li{font-size:.9rem;color:var(--ink-soft);padding-left:18px;position:relative;}
.role-list li::before{content:"";position:absolute;left:0;top:.6em;width:7px;height:7px;border-radius:2px;}
.role-victim .role-list li::before{background:var(--victim);}
.role-weapon .role-list li::before{background:var(--weapon);}
.role-shield .role-list li::before{background:var(--shield);}
.role-eg{font-size:.85rem;color:var(--ink-mute);font-style:italic;margin:0 0 18px;}
.role-explore{
  align-self:flex-start;font-family:var(--sans);font-weight:600;font-size:.9rem;cursor:pointer;
  background:none;border:none;padding:0;transition:.15s;
}
.role-victim .role-explore{color:var(--victim);}
.role-weapon .role-explore{color:var(--weapon);}
.role-shield .role-explore{color:var(--shield);}
.role-explore:hover{gap:10px;letter-spacing:.01em;opacity:.8;}

/* ---------- FIGURES ---------- */
.figure-wide{margin:0;text-align:center;}
.figure-wide img{
  margin:0 auto;border-radius:var(--radius);box-shadow:var(--shadow);background:#fff;
}
.figure-bordered img{border:1px solid var(--line);padding:14px;}
.figure-wide figcaption{
  font-size:.9rem;color:var(--ink-mute);margin-top:16px;max-width:760px;margin-left:auto;margin-right:auto;
}
.figure-cloud img{max-width:min(680px,100%);height:auto;}

/* ---------- TAXONOMY ---------- */
.tax-cols{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-bottom:48px;}
.tax-col{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);}
.tax-col-head{padding:20px 22px;color:#fff;display:flex;align-items:center;gap:12px;}
.tax-victim .tax-col-head{background:linear-gradient(135deg,#3a7ec0,#2f6fb3);}
.tax-weapon .tax-col-head{background:linear-gradient(135deg,#d04a3b,#c0392b);}
.tax-shield .tax-col-head{background:linear-gradient(135deg,#3aa069,#2f8f5b);}
.tax-col-head .tax-emoji{font-size:1.4rem;}
.tax-col-head h3{margin:0;font-family:var(--serif);font-size:1.34rem;font-weight:600;}
.tax-col-head .tax-sec{display:block;font-size:.74rem;opacity:.82;font-weight:600;letter-spacing:.05em;text-transform:uppercase;}
.tax-group{border-top:1px solid var(--line-soft);}
.tax-group:first-of-type{border-top:none;}
.tax-q{
  width:100%;text-align:left;background:none;border:none;cursor:pointer;
  padding:15px 22px;display:flex;justify-content:space-between;align-items:center;gap:10px;
  font-family:var(--sans);font-weight:600;font-size:.98rem;color:var(--ink);transition:.15s;
}
.tax-q:hover{background:var(--bg-warm);}
.tax-q .tax-toggle{font-size:1.2rem;color:var(--ink-mute);transition:.2s;line-height:1;flex-shrink:0;}
.tax-q.open .tax-toggle{transform:rotate(45deg);}
.tax-a{max-height:0;overflow:hidden;transition:max-height .3s ease;}
.tax-a-inner{padding:0 22px 16px;font-size:.9rem;color:var(--ink-soft);}
.tax-a-inner ul{margin:0;padding-left:18px;}
.tax-a-inner li{margin:5px 0;}
.tax-a-inner .tax-desc{margin:0 0 10px;}

/* ---------- EXPLORER ---------- */
.explorer{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;}
.explorer-controls{padding:22px 24px;border-bottom:1px solid var(--line);background:var(--bg-warm);}
.search-wrap{display:flex;align-items:center;gap:10px;background:#fff;border:1.5px solid var(--line);border-radius:11px;padding:0 14px;transition:.15s;}
.search-wrap:focus-within{border-color:var(--accent);box-shadow:0 0 0 3px rgba(31,111,235,.12);}
.search-wrap svg{color:var(--ink-mute);flex-shrink:0;}
#searchInput{flex:1;border:none;outline:none;padding:13px 0;font-family:var(--sans);font-size:.98rem;background:none;color:var(--ink);}
.filter-row{display:flex;justify-content:space-between;flex-wrap:wrap;gap:16px;margin-top:16px;align-items:center;}
.chips{display:flex;gap:8px;flex-wrap:wrap;}
.chip{
  font-family:var(--sans);font-weight:600;font-size:.86rem;cursor:pointer;
  padding:8px 15px;border-radius:999px;border:1.5px solid var(--line);background:#fff;color:var(--ink-soft);transition:.15s;
}
.chip:hover{border-color:var(--ink-mute);}
.chip-all.active{background:var(--ink);border-color:var(--ink);color:#fff;}
.chip-victim.active{background:var(--victim);border-color:var(--victim);color:#fff;}
.chip-weapon.active{background:var(--weapon);border-color:var(--weapon);color:#fff;}
.chip-shield.active{background:var(--shield);border-color:var(--shield);color:#fff;}
.selects{display:flex;gap:12px;flex-wrap:wrap;}
.sel{display:flex;flex-direction:column;gap:3px;font-size:.74rem;font-weight:600;color:var(--ink-mute);text-transform:uppercase;letter-spacing:.04em;}
.sel select{
  font-family:var(--sans);font-size:.9rem;font-weight:500;color:var(--ink);
  padding:7px 10px;border:1.5px solid var(--line);border-radius:9px;background:#fff;cursor:pointer;text-transform:none;letter-spacing:0;
}
.sel select:focus{outline:none;border-color:var(--accent);}
.chip b{font-weight:700;font-size:.78rem;opacity:.62;margin-left:3px;}
.chip.active b{opacity:.85;}

.year-filter{display:flex;align-items:center;gap:22px;margin-top:18px;flex-wrap:wrap;}
.year-ctrl{display:flex;align-items:center;gap:10px;flex:1;min-width:230px;}
.yf-label{font-size:.86rem;color:var(--ink-soft);white-space:nowrap;}
.yf-label strong{color:var(--ink);font-family:var(--mono);font-size:.84rem;}
.year-ctrl input[type=range]{flex:1;min-width:120px;accent-color:var(--accent);}
.reset-btn{
  font-family:var(--sans);font-weight:600;font-size:.84rem;color:var(--ink-soft);cursor:pointer;
  background:#fff;border:1.5px solid var(--line);border-radius:9px;padding:8px 14px;transition:.15s;white-space:nowrap;
}
.reset-btn:hover{border-color:var(--ink-mute);color:var(--ink);background:var(--bg-warm);}

.explorer-summary{
  display:flex;align-items:center;gap:18px;flex-wrap:wrap;
  padding:14px 24px;border-bottom:1px solid var(--line);background:#fff;
}
.sum-counts{display:flex;gap:8px;flex-wrap:wrap;}
.sum-pill{display:inline-flex;align-items:center;gap:6px;font-size:.82rem;font-weight:600;padding:5px 11px;border-radius:999px;}
.sum-pill .dot{width:8px;height:8px;border-radius:50%;background:currentColor;}
.sum-pill.v{background:var(--victim-bg);color:var(--victim);}
.sum-pill.w{background:var(--weapon-bg);color:var(--weapon);}
.sum-pill.s{background:var(--shield-bg);color:var(--shield);}
.rel-legend{display:flex;align-items:center;gap:12px;flex-wrap:wrap;font-size:.78rem;color:var(--ink-mute);}
.rl-label{font-weight:700;letter-spacing:.04em;text-transform:uppercase;font-size:.72rem;}
.rl{display:inline-flex;align-items:center;gap:6px;}
.rel-legend .rel-badge{width:20px;height:20px;font-size:.72rem;}
.result-count{margin-left:auto;font-size:.88rem;font-weight:700;color:var(--ink);}

.table-scroll{max-height:640px;overflow-y:auto;overflow-x:hidden;max-width:100%;}
.paper-table{width:100%;border-collapse:collapse;font-size:.92rem;table-layout:fixed;}
.td-title{word-wrap:break-word;overflow-wrap:anywhere;}
.paper-table thead th{
  position:sticky;top:0;z-index:2;background:#fff;text-align:left;
  font-size:.74rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--ink-mute);
  padding:14px 16px;border-bottom:2px solid var(--line);
}
.sortable{cursor:pointer;user-select:none;}
.sortable:hover{color:var(--ink);}
.sortable.sorted::after{content:" \2193";opacity:.7;}
.sortable.sorted.asc::after{content:" \2191";}
.paper-table tbody tr{border-bottom:1px solid var(--line-soft);transition:background .12s;}
.paper-table tbody tr:hover{background:var(--bg-warm);}
.paper-table td{padding:12px 16px;vertical-align:middle;color:var(--ink-soft);}
.col-year{width:60px;}
.col-venue{width:116px;}
.col-role{width:104px;}
.col-rel{width:54px;text-align:center;}
.td-year{font-family:var(--mono);font-size:.86rem;color:var(--ink);font-weight:500;}
.td-venue{font-weight:600;color:var(--ink);font-size:.84rem;}
.td-title{color:var(--ink);font-weight:500;line-height:1.4;}
.role-pill{display:inline-flex;align-items:center;gap:6px;font-size:.74rem;font-weight:700;padding:4px 10px;border-radius:999px;white-space:nowrap;}
.role-pill.v{background:var(--victim-bg);color:var(--victim);}
.role-pill.w{background:var(--weapon-bg);color:var(--weapon);}
.role-pill.s{background:var(--shield-bg);color:var(--shield);}
.role-pill .dot{width:7px;height:7px;border-radius:50%;background:currentColor;}
.rel-badge{display:inline-grid;place-items:center;width:26px;height:26px;border-radius:7px;font-size:.8rem;font-weight:700;font-family:var(--mono);margin:0 auto;}
.rel-1{background:#f0f1f4;color:#8b93a4;}
.rel-2{background:#e3edf9;color:#3a72b8;}
.rel-3{background:#fdf0d9;color:#b67d18;}
.rel-4{background:#fde3df;color:#c0392b;}
.empty-state{text-align:center;padding:50px 20px;color:var(--ink-mute);font-size:1rem;}

/* ---------- TRENDS ---------- */
.charts-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-bottom:48px;}
.chart-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:24px;}
.chart-card.chart-wide{grid-column:1 / -1;}
.chart-card h3{margin:0 0 18px;font-size:1.05rem;font-weight:700;color:var(--ink);}
.chart-holder{position:relative;height:300px;}
.chart-card.chart-wide .chart-holder{height:340px;}

/* ---------- CHALLENGES & FUTURE ---------- */
.challenge-band{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-bottom:46px;}
.challenge{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px 24px;box-shadow:var(--shadow);position:relative;}
.challenge-no{font-size:.74rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--weapon);}
.challenge h3{font-family:var(--serif);font-size:1.3rem;font-weight:600;margin:8px 0 10px;}
.challenge p{margin:0;font-size:.94rem;color:var(--ink-soft);}
.future-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;}
.future-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px 26px;box-shadow:var(--shadow);transition:.2s;}
.future-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);}
.future-icon{font-size:1.9rem;margin-bottom:12px;}
.future-card h3{font-family:var(--serif);font-size:1.32rem;font-weight:600;margin:0 0 10px;color:var(--ink);}
.future-card p{margin:0;font-size:.97rem;color:var(--ink-soft);}

/* ---------- CITATION ---------- */
.section-cite{background:var(--bg-warm);}
.bibtex-card{position:relative;background:var(--ink-hero);border-radius:var(--radius);padding:26px 28px;box-shadow:var(--shadow-lg);overflow:auto;}
.bibtex-card pre{margin:0;font-family:var(--mono);font-size:.84rem;line-height:1.7;color:#d6dce8;white-space:pre;}
.copy-btn{position:absolute;top:16px;right:16px;background:rgba(255,255,255,.1);color:#e6eaf2;border:1px solid rgba(255,255,255,.2);border-radius:8px;padding:7px 14px;font-family:var(--sans);font-weight:600;font-size:.82rem;cursor:pointer;transition:.15s;}
.copy-btn:hover{background:rgba(255,255,255,.2);}
.copy-btn.copied{background:var(--shield);border-color:var(--shield);color:#fff;}
.cite-links{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;margin-top:24px;}
.section-cite .btn-line{background:#fff;color:var(--ink-soft);border-color:var(--line);}
.section-cite .btn-line:hover{border-color:var(--ink-mute);color:var(--ink);}

/* ---------- FOOTER ---------- */
.footer{background:var(--ink-hero);color:#aab2c2;padding:60px 0 30px;}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:36px;padding-bottom:36px;border-bottom:1px solid rgba(255,255,255,.1);}
.footer-brand{font-weight:800;font-size:1.1rem;color:#fff;margin-bottom:12px;letter-spacing:-.01em;}
.footer-text{font-size:.92rem;color:#8b93a4;margin:0;line-height:1.7;}
.footer-col h4{font-size:.78rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:#c4cad7;margin:0 0 14px;}
.footer-col a{display:block;color:#9aa3b4;font-size:.92rem;padding:4px 0;transition:.15s;}
.footer-col a:hover{color:#fff;}
.footer-bottom{display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;padding-top:24px;font-size:.84rem;color:#6b7280;}

/* ---------- TO TOP ---------- */
.to-top{position:fixed;bottom:26px;right:26px;width:46px;height:46px;border-radius:50%;background:var(--ink);color:#fff;border:none;font-size:1.2rem;cursor:pointer;box-shadow:var(--shadow-lg);opacity:0;pointer-events:none;transition:.25s;z-index:40;}
.to-top.show{opacity:1;pointer-events:auto;}
.to-top:hover{background:#000;transform:translateY(-3px);}

/* ---------- RESPONSIVE ---------- */
@media (max-width:980px){
  .nav-links{display:none;}
  .roles,.tax-cols,.challenge-band{grid-template-columns:1fr;}
  .charts-grid,.future-grid,.contrib-grid{grid-template-columns:1fr;}
  .chart-card.chart-wide{grid-column:auto;}
  .footer-grid{grid-template-columns:1fr;gap:24px;}
}
@media (max-width:620px){
  .section{padding:60px 0;}
  .hero-inner{padding:54px 20px 48px;}
  .container{padding:0 18px;}
  .equation-card{padding:30px 20px;}
  .selects{width:100%;}
  .result-count{margin-left:0;width:100%;}
  .col-venue{display:none;}
  .nav-cta .btn-ghost{display:none;}
}
@media (prefers-reduced-motion:reduce){
  *{scroll-behavior:auto!important;transition:none!important;}
}