/* The Scissors Effect - project page.
   Layout grammar follows the GeoSelect / PInVerify project pages so the three
   read as one series; only the palette differs. Chestnut replaces teal as the
   primary, and standard/robust carry a fixed two-colour semantic encoding
   throughout, because on this page colour means something. */

:root{
  --chest:#8C4A2F;        /* primary  (was teal) */
  --chest-light:#A8613F;
  --chest-dark:#6E3722;
  --chest-bg:#FAF0EA;
  --steel:#2A5C7A;        /* secondary (was indigo) */
  --steel-light:#3F7699;
  --steel-bg:#EBF2F7;
  --sand:#C79A3C;         /* accent   (was amber) */
  --sand-light:#DDB05A;
  --sand-bg:#FBF4E4;

  /* semantic: these two are load-bearing, not decoration */
  --std:var(--steel);
  --rob:var(--chest);

  --gray-50:#FAFAFA; --gray-100:#F4F5F7; --gray-200:#EAECEF; --gray-300:#DCDFE4;
  --gray-500:#8A9099; --gray-600:#6B727B; --gray-800:#3A4049; --gray-900:#1C2128;
  --white:#FFFFFF;
  --shadow-sm:0 1px 3px rgba(40,25,20,.08);
  --shadow-md:0 4px 14px rgba(40,25,20,.10);
  --shadow-lg:0 10px 34px rgba(40,25,20,.14);
  --radius:14px; --radius-sm:9px;
  --transition:.28s cubic-bezier(.4,0,.2,1);
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:58px}
body{font-family:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  color:var(--gray-900);line-height:1.62;background:var(--white);
  -webkit-font-smoothing:antialiased}

h1,h2,h3,h4{font-weight:700;line-height:1.3;letter-spacing:-.01em}
h1{font-size:2.8rem} h2{font-size:1.85rem} h3{font-size:1.3rem}
p{color:var(--gray-800)}
code,.mono,.num{font-family:'Fira Code','SF Mono','Consolas',monospace}
a{color:var(--chest);text-decoration:none}
a:hover{text-decoration:underline}

.section-title{text-align:center;margin-bottom:2.4rem}
.section-title h2{display:inline-block;position:relative}
.section-title h2::after{content:'';display:block;width:64px;height:3px;
  background:linear-gradient(90deg,var(--chest),var(--sand));
  margin:.55rem auto 0;border-radius:2px}
.section-title .sub{margin-top:.6rem;color:var(--gray-600);font-size:.95rem;font-weight:400;
  max-width:74ch;margin-left:auto;margin-right:auto}

.container{max-width:1140px;margin:0 auto;padding:0 24px}
section{padding:5rem 0}
section:nth-child(even){background:var(--gray-50)}

/* ---- nav ---- */
.site-nav{position:sticky;top:0;z-index:900;background:rgba(255,255,255,.9);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--gray-200);padding:.55rem 0}
.site-nav ul{list-style:none;display:flex;justify-content:center;gap:1.5rem;flex-wrap:wrap;
  max-width:1140px;margin:0 auto;padding:0 24px}
.site-nav a{color:var(--gray-600);text-decoration:none;font-size:.82rem;font-weight:600;
  letter-spacing:.2px;padding:.2rem 0;border-bottom:2px solid transparent;
  transition:var(--transition)}
.site-nav a:hover{color:var(--chest);border-bottom-color:var(--chest);text-decoration:none}

/* ---- hero ---- */
.hero{background:linear-gradient(165deg,var(--chest-bg) 0%,var(--white) 55%);
  padding:5.2rem 0 4.2rem;text-align:center;position:relative;overflow:hidden}
.hero .container{position:relative;z-index:1}
.hero .eyebrow{display:inline-block;font-size:.78rem;font-weight:700;letter-spacing:.14em;
  text-transform:uppercase;color:var(--chest-dark);background:var(--chest-bg);
  border:1px solid rgba(140,74,47,.2);padding:.3rem .85rem;border-radius:50px;
  margin-bottom:1.3rem}
.hero h1{font-size:3rem;background:linear-gradient(120deg,var(--chest) 0%,var(--steel) 100%);
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;
  margin-bottom:.6rem}
.hero .subtitle{font-size:1.18rem;color:var(--gray-800);margin-bottom:1.4rem;font-weight:400;
  max-width:760px;margin-left:auto;margin-right:auto}
.hero .subtitle strong{color:var(--steel);font-weight:700}
.authors{font-size:1rem;color:var(--gray-800);margin-bottom:.35rem}
.authors sup{color:var(--gray-500);font-size:.72rem}
.affil{font-size:.88rem;color:var(--gray-600);margin-bottom:1.3rem}
.affil sup{color:var(--gray-500)}
.venue-badge{display:inline-flex;align-items:center;gap:.45rem;font-size:.8rem;font-weight:600;
  color:var(--sand);background:var(--sand-bg);border:1px solid rgba(199,154,60,.3);
  padding:.32rem .9rem;border-radius:50px;margin-bottom:1.4rem}
.btn-group{display:flex;gap:.7rem;justify-content:center;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:.45rem;padding:.62rem 1.25rem;
  border-radius:var(--radius-sm);font-size:.92rem;font-weight:600;
  border:1px solid var(--gray-300);background:var(--white);color:var(--gray-800);
  box-shadow:var(--shadow-sm);transition:var(--transition)}
.btn:hover{transform:translateY(-2px);box-shadow:var(--shadow-md);text-decoration:none;
  border-color:var(--chest);color:var(--chest)}
.btn-primary{background:linear-gradient(120deg,var(--chest),var(--chest-light));
  color:var(--white);border-color:transparent}
.btn-primary:hover{color:var(--white);border-color:transparent}

/* ---- cards ---- */
.card{background:var(--white);border:1px solid var(--gray-200);border-radius:var(--radius);
  padding:1.5rem 1.6rem;box-shadow:var(--shadow-sm);transition:var(--transition)}
.card:hover{box-shadow:var(--shadow-md)}
.card-title{font-size:.76rem;font-weight:700;letter-spacing:.13em;text-transform:uppercase;
  color:var(--gray-500);margin-bottom:.55rem}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:1.2rem}
@media(max-width:820px){.grid2{grid-template-columns:1fr}}

/* ---- controls ---- */
.ctl{display:flex;align-items:center;gap:1rem;flex-wrap:wrap;margin-bottom:.6rem}
.ctl label{font-size:.76rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase;
  color:var(--gray-500)}
input[type=range]{-webkit-appearance:none;appearance:none;height:5px;border-radius:3px;
  background:var(--gray-200);flex:1;min-width:200px;outline:none}
input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:19px;height:19px;
  border-radius:50%;background:var(--white);border:3px solid var(--chest);cursor:grab;
  box-shadow:var(--shadow-sm)}
input[type=range]::-moz-range-thumb{width:19px;height:19px;border-radius:50%;
  background:var(--white);border:3px solid var(--chest);cursor:grab}
.val{font-family:'Fira Code',monospace;font-size:1rem;font-weight:600;min-width:56px;
  color:var(--chest-dark)}

.readout{display:flex;gap:.8rem;flex-wrap:wrap;margin-top:1.1rem}
.chip{flex:1;min-width:190px;border-radius:var(--radius-sm);padding:.85rem 1rem;
  border:1px solid var(--gray-200);background:var(--gray-50)}
.chip.std{background:var(--steel-bg);border-color:rgba(42,92,122,.22)}
.chip.rob{background:var(--chest-bg);border-color:rgba(140,74,47,.22)}
.chip .k{font-size:.7rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;
  color:var(--gray-500)}
.chip .v{font-family:'Fira Code',monospace;font-size:1.55rem;font-weight:600;line-height:1.3}
.chip.std .v{color:var(--std)} .chip.rob .v{color:var(--rob)}
.chip .s{font-size:.78rem;color:var(--gray-600)}

/* ---- tables ---- */
table{width:100%;border-collapse:collapse;font-size:.9rem}
th,td{padding:.5rem .6rem;text-align:right;border-bottom:1px solid var(--gray-200)}
th:first-child,td:first-child{text-align:left}
th{font-size:.7rem;letter-spacing:.09em;text-transform:uppercase;color:var(--gray-500);
  font-weight:700}
tbody tr:hover{background:var(--gray-50)}
.pos{color:var(--std)} .neg{color:var(--rob)} .dim{color:var(--gray-500)}

/* ---- bar rows ---- */
.bars{display:flex;flex-direction:column;gap:.55rem;margin-top:.4rem}
.bar{display:grid;grid-template-columns:190px 1fr 105px;align-items:center;gap:.75rem;
  font-size:.88rem}
.bar .track{position:relative;height:22px;background:var(--gray-100);border-radius:5px}
.bar .zero{position:absolute;top:-3px;bottom:-3px;width:1px;background:var(--gray-500);opacity:.55}
.bar .fill{position:absolute;top:3px;bottom:3px;border-radius:4px;transition:var(--transition)}
.bar .ci{position:absolute;top:10px;height:2px;background:rgba(28,33,40,.28)}
.bar .lab{font-family:'Fira Code',monospace;font-size:.85rem;text-align:right;font-weight:600}
@media(max-width:820px){.bar{grid-template-columns:120px 1fr 88px;font-size:.8rem}}

/* ---- gauge ---- */
.gauge{position:relative;height:44px;margin:1.3rem 0 .4rem}
.gauge .rail{position:absolute;top:19px;left:0;right:0;height:6px;border-radius:3px;
  background:linear-gradient(90deg,var(--steel) 0%,var(--steel) 92%,var(--chest) 92%,var(--chest) 100%);
  opacity:.32}
.gauge .tau{position:absolute;top:2px;bottom:2px;left:92%;width:2px;background:var(--gray-900)}
.gauge .tau span{position:absolute;top:-17px;left:50%;transform:translateX(-50%);
  font-family:'Fira Code',monospace;font-size:.7rem;white-space:nowrap;color:var(--gray-900)}
.gauge .knob{position:absolute;top:11px;width:22px;height:22px;margin-left:-11px;border-radius:50%;
  background:var(--white);border:3px solid var(--chest);box-shadow:var(--shadow-sm);
  transition:var(--transition)}
.verdict{display:flex;align-items:center;gap:.7rem;margin-top:.6rem;
  font-family:'Fira Code',monospace;font-size:1.05rem;font-weight:600}
.verdict.on{color:var(--std)} .verdict.off{color:var(--rob)}

/* ---- misc ---- */
.pill{display:inline-block;font-size:.78rem;font-weight:600;padding:.28rem .8rem;
  border-radius:50px;border:1px solid var(--gray-300);background:var(--white);
  color:var(--gray-600);margin:0 .35rem .4rem 0;cursor:pointer;
  transition:var(--transition);box-shadow:var(--shadow-sm)}
.pill:hover{border-color:var(--chest);color:var(--chest)}
.pill.sel{background:var(--chest);color:var(--white);border-color:var(--chest)}
ul.tight{margin:0;padding-left:1.2rem;color:var(--gray-800)}
ul.tight li{margin:.5rem 0}
pre.bib{background:var(--gray-50);border:1px solid var(--gray-200);border-radius:var(--radius-sm);
  padding:1rem 1.1rem;font-family:'Fira Code',monospace;font-size:.8rem;overflow-x:auto;
  color:var(--gray-800)}
.src{font-size:.74rem;color:var(--gray-500);margin-top:.7rem;line-height:1.5}
footer{padding:2.4rem 0 3.4rem;color:var(--gray-500);font-size:.85rem;text-align:center;
  border-top:1px solid var(--gray-200)}