/* Chess Forensics — Classical Wooden Chessboard Theme */

@import url('https://fonts.googleapis.com/css2?family=Libre+Baskerville:ital,wght@0,400;0,700;1,400&family=Inter:wght@300;400;500;600&family=IBM+Plex+Mono:wght@400;500&display=swap');

:root {
  /* wood palette */
  --void: #1a0e08;
  --walnut: #2c1810;
  --mahogany: #3d2517;
  --oak: #5a3a24;
  --maple: #f0d9b5;
  --cream: #f5e6d0;
  --parchment: #ede0cc;
  --dark-sq: #b58863;
  --light-sq: #f0d9b5;

  /* functional */
  --glass: rgba(44,24,16,0.88);
  --glass-2: rgba(61,37,23,0.80);
  --border-glow: rgba(181,136,99,0.2);
  --fg: #faf3e8;
  --fg-2: #d9c4a4;
  --fg-3: #a6896a;
  --cyan: #d4a034;
  --blue: #c28b30;
  --deepblue: #8b5e1a;
  --teal: #b89040;
  --pink: #c47060;
  --gold: #d4a034;
  --red: #c45040;
  --emerald: #6a9a50;

  --font-display: 'Libre Baskerville', Georgia, 'Times New Roman', serif;
  --font-body: 'Inter', 'Segoe UI', system-ui, sans-serif;
  --font-mono: 'IBM Plex Mono', 'Consolas', monospace;
}

*{box-sizing:border-box;margin:0;padding:0}
html,body{height:100%;overflow-x:hidden;background:var(--void);color:var(--fg);font:400 17px/1.65 var(--font-body);-webkit-font-smoothing:antialiased}
::selection{background:var(--dark-sq);color:#fff}
a{color:var(--gold);text-decoration:none}
a:hover{text-decoration:underline}

/* ======================================================= CHESSBOARD BACKGROUND */

#cosmos{position:fixed;inset:0;z-index:0;overflow:hidden;background:var(--light-sq)}

/* Full-page chessboard squares */
#cosmos::before{
  content:'';position:absolute;inset:0;
  background:
    repeating-conic-gradient(
      var(--dark-sq) 0% 25%,
      var(--light-sq) 0% 50%
    ) 0 0 / 80px 80px;
}

/* Dark vignette overlay so content is readable against the board */
#cosmos::after{
  content:'';position:absolute;inset:0;
  background:
    radial-gradient(ellipse 100% 100% at 50% 40%, rgba(26,14,8,0.55) 0%, rgba(26,14,8,0.88) 70%),
    linear-gradient(180deg, rgba(26,14,8,0.3) 0%, rgba(26,14,8,0.7) 100%);
}

/* Warm ambient glow orbs — add depth over the board */
.orb{position:absolute;border-radius:50%;filter:blur(120px);opacity:0.15;pointer-events:none;z-index:1}
.o1{width:500px;height:500px;background:rgba(240,217,181,0.3);top:5%;left:10%;animation:drift1 30s ease-in-out infinite}
.o2{width:350px;height:350px;background:rgba(181,136,99,0.25);top:55%;right:5%;animation:drift2 35s ease-in-out infinite}
.o3{width:400px;height:400px;background:rgba(212,160,52,0.15);bottom:10%;left:35%;animation:drift3 40s ease-in-out infinite}
.o4{width:250px;height:250px;background:rgba(240,217,181,0.12);top:30%;right:25%;animation:drift1 33s ease-in-out infinite reverse}
.o5{width:300px;height:300px;background:rgba(181,136,99,0.15);top:70%;left:60%;animation:drift2 38s ease-in-out infinite reverse}

@keyframes drift1{0%,100%{transform:translate(0,0)}33%{transform:translate(40px,-50px)}66%{transform:translate(-30px,40px)}}
@keyframes drift2{0%,100%{transform:translate(0,0)}33%{transform:translate(-50px,30px)}66%{transform:translate(30px,-40px)}}
@keyframes drift3{0%,100%{transform:translate(0,0)}33%{transform:translate(20px,50px)}66%{transform:translate(-40px,-20px)}}

/* ======================================================= APP LAYOUT */

#app{position:relative;z-index:1;min-height:100vh;display:flex;flex-direction:column}

/* INPUT OVERLAY */
#input-overlay{
  position:fixed;inset:0;z-index:100;
  display:flex;align-items:center;justify-content:center;
  padding:40px 20px;
  background:rgba(26,14,8,0.7);
  backdrop-filter:blur(8px);
  transition:opacity 0.4s ease,visibility 0.4s ease;
}
#input-overlay.hidden{opacity:0;visibility:hidden;pointer-events:none}

#input-card{
  width:100%;max-width:560px;
  background:rgba(44,24,16,0.95);
  backdrop-filter:blur(30px) saturate(1.2);
  border:1px solid rgba(181,136,99,0.15);
  border-radius:16px;
  padding:28px 32px 28px;
  position:relative;overflow:hidden;
  box-shadow:0 24px 80px rgba(0,0,0,0.5),0 0 1px rgba(181,136,99,0.2);
  max-height:90vh;overflow-y:auto;
  animation:cardIn 0.4s cubic-bezier(0.22,1,0.36,1) both;
}
@keyframes cardIn{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:none}}

#input-card::before{
  content:'';position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(212,160,52,0.3),transparent);
}

/* modal header */
.modal-header{margin-bottom:20px}
.modal-title{
  font:600 20px var(--font-display);color:var(--fg);margin:0 0 14px;
}
.seg--mode{margin-bottom:0}
.seg--source{margin-bottom:14px}

.logo{
  font:800 42px/1 var(--font-display);text-align:center;
  background:linear-gradient(135deg,var(--cream),var(--gold),var(--dark-sq));
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;
  margin-bottom:8px;
  filter:drop-shadow(0 0 20px rgba(212,160,52,0.2));
  animation:logoGlow 4s ease-in-out infinite alternate;
}
@keyframes logoGlow{0%{filter:drop-shadow(0 0 16px rgba(181,136,99,0.15))}100%{filter:drop-shadow(0 0 24px rgba(212,160,52,0.2))}}

.tagline{text-align:center;color:var(--fg-2);font-size:13px;margin-bottom:28px}

/* settings collapse */
.settings-collapse{margin:16px 0 20px;border:1px solid rgba(181,136,99,0.1);border-radius:10px;overflow:hidden}
.settings-toggle{
  padding:10px 14px;font:500 11px var(--font-body);color:var(--fg-3);
  cursor:pointer;list-style:none;transition:color 0.2s;
}
.settings-toggle:hover{color:var(--fg)}
.settings-toggle::marker,.settings-toggle::-webkit-details-marker{display:none}
.settings-toggle::before{content:'+ ';font:500 13px var(--font-mono);color:var(--fg-3)}
.settings-collapse[open] .settings-toggle::before{content:'- '}
.settings-collapse[open] .settings-toggle{border-bottom:1px solid rgba(181,136,99,0.1)}
.settings-body{padding:14px}
.settings-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}

/* TOPBAR — always visible */
#topbar{
  display:flex;align-items:center;justify-content:space-between;
  padding:14px 32px;
  background:rgba(26,14,8,0.85);backdrop-filter:blur(20px) saturate(1.2);
  border-bottom:1px solid rgba(181,136,99,0.12);
  position:sticky;top:0;z-index:50;
}
#app.has-results #input-overlay{pointer-events:none;opacity:0;visibility:hidden}
#app.has-results #input-overlay.visible{pointer-events:auto;opacity:1;visibility:visible}
#app.has-results #welcome{display:none}

.logo-sm{
  font:700 14px var(--font-display);
  background:linear-gradient(90deg,var(--gold),var(--cream));
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;
}
.topbar-right{display:flex;align-items:center;gap:6px}
.nav-link{
  font:500 11px var(--font-body);color:var(--fg-3);
  padding:6px 12px;border-radius:6px;text-decoration:none;
  transition:color 0.2s,background 0.2s;
}
.nav-link:hover{color:var(--fg);background:rgba(181,136,99,0.08);text-decoration:none}

/* OVERLAY CLOSE */
.overlay-close{
  position:absolute;top:14px;right:16px;
  background:rgba(181,136,99,0.06);border:1px solid rgba(181,136,99,0.12);
  color:var(--fg-3);width:32px;height:32px;
  font-size:18px;cursor:pointer;line-height:1;
  display:flex;align-items:center;justify-content:center;
  border-radius:8px;transition:color 0.2s,background 0.2s,border-color 0.2s;z-index:2;
}
.overlay-close:hover{color:var(--fg);background:rgba(181,136,99,0.12);border-color:rgba(181,136,99,0.25)}

/* MAIN CONTENT */
#stage{flex:1;width:100%;max-width:1200px;margin:0 auto;padding:0 32px}
#app.has-results #stage{padding-top:24px;padding-bottom:100px}

/* ======================================================= HERO */

.hero{
  display:flex;align-items:center;justify-content:center;
  min-height:calc(100vh - 54px);padding:60px 0;text-align:center;
  position:relative;
}

/* Decorative chess pieces flanking the hero */
.hero::before, .hero::after{
  position:absolute;font-size:160px;opacity:0.07;pointer-events:none;
  font-family:serif;line-height:1;color:var(--maple);
}
.hero::before{
  content:'\265A';  /* black king */
  top:12%;left:6%;transform:rotate(-8deg);
}
.hero::after{
  content:'\265B';  /* black queen */
  bottom:8%;right:6%;transform:rotate(6deg);
}

.hero-inner{max-width:700px}
.hero-badge{
  display:inline-block;
  font:500 12px var(--font-display);letter-spacing:0.18em;text-transform:uppercase;
  color:var(--gold);
  background:rgba(212,160,52,0.06);border:1px solid rgba(212,160,52,0.15);
  border-radius:20px;padding:6px 20px;margin-bottom:28px;
  animation:heroFade 0.8s ease both;
}
.hero-title{
  font:800 clamp(48px,7vw,76px)/1 var(--font-display);
  background:linear-gradient(135deg,var(--cream) 20%,var(--gold) 50%,var(--dark-sq) 100%);
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;
  margin-bottom:24px;
  filter:drop-shadow(0 0 40px rgba(212,160,52,0.15));
  animation:heroRise 0.9s cubic-bezier(0.22,1,0.36,1) 0.15s both;
}
.hero-desc{
  font:300 clamp(15px,2vw,18px)/1.7 var(--font-body);
  color:var(--fg-2);max-width:540px;margin:0 auto 36px;
  animation:heroFade 0.8s ease 0.4s both;
}
.hero-actions{
  display:flex;gap:14px;justify-content:center;align-items:center;flex-wrap:wrap;
  animation:heroFade 0.8s ease 0.6s both;
}
@keyframes heroRise{from{opacity:0;transform:translateY(30px) scale(0.96)}to{opacity:1;transform:none}}
@keyframes heroFade{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:none}}
.hero-scroll{
  display:inline-flex;align-items:center;justify-content:center;
  padding:16px 48px;border-radius:12px;
  font:600 13px var(--font-display);letter-spacing:0.12em;text-transform:uppercase;
  background:transparent;border:2px solid rgba(181,136,99,0.3);
  color:var(--gold);cursor:pointer;
  transition:all 0.3s ease;text-decoration:none!important;
}
.hero-scroll:hover{
  border-color:var(--gold);color:var(--cream);
  box-shadow:0 0 30px rgba(212,160,52,0.1);
  background:rgba(181,136,99,0.06);
  text-decoration:none!important;
}

/* ======================================================= FEATURES */

.features-section{padding:80px 0 60px}
.features-grid{
  display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:28px;
}
@media(max-width:900px){.features-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:500px){.features-grid{grid-template-columns:1fr}}

.feature-card{
  background:var(--glass-2);backdrop-filter:blur(14px) saturate(1.1);
  border:1px solid rgba(181,136,99,0.1);border-radius:14px;
  padding:24px 20px 20px;position:relative;overflow:hidden;
  transition:border-color 0.3s,box-shadow 0.3s,transform 0.3s;
  opacity:0;transform:translateY(24px);
  text-align:center;
}
.features-grid.visible .feature-card{
  animation:cardRise 0.6s ease-out both;
}
.features-grid.visible .feature-card:nth-child(2){animation-delay:0.12s}
.features-grid.visible .feature-card:nth-child(3){animation-delay:0.24s}
.features-grid.visible .feature-card:nth-child(4){animation-delay:0.36s}
@keyframes cardRise{from{opacity:0;transform:translateY(24px)}to{opacity:1;transform:translateY(0)}}
.feature-card:hover{
  border-color:rgba(212,160,52,0.2);transform:translateY(-4px);
  box-shadow:0 0 40px rgba(181,136,99,0.06),0 20px 50px rgba(0,0,0,0.3);
}
.feature-card::before{
  content:'';position:absolute;top:0;left:0;right:0;height:3px;
  background:
    repeating-conic-gradient(
      var(--dark-sq) 0% 25%,
      var(--light-sq) 0% 50%
    ) 0 0 / 6px 6px;
  opacity:0.5;
}
.feature-card h4{
  font:600 16px var(--font-display);color:var(--fg);margin-bottom:8px;
}
.feature-card p{
  font-size:15px;color:var(--fg-2);line-height:1.65;text-align:left;
}

/* --- feature mini UIs --- */
.feat-viz{
  height:110px;display:flex;align-items:center;justify-content:center;
  margin-bottom:16px;
}
.feat-board{width:110px;height:110px;border-radius:6px;overflow:hidden}

/* Restyle mini-board squares to wood colors */
.feat-board rect:nth-child(odd){fill:rgba(181,136,99,0.18)!important}
.feat-board rect:nth-child(even){fill:rgba(240,217,181,0.1)!important}

.feat-arrow{stroke-width:2;stroke-linecap:round}
.feat-arrow.arrow-best{stroke:var(--emerald)}
.feat-arrow.arrow-alt{stroke:var(--gold)}
.feat-piece{filter:drop-shadow(0 2px 4px rgba(0,0,0,0.4))}

/* signal bars mini */
.feat-signals{width:100%;padding:0 4px}
.feat-sig-row{display:flex;align-items:center;gap:6px;margin-bottom:5px}
.feat-sig-label{font:500 9px var(--font-mono);color:var(--fg-3);width:58px;text-align:right;flex-shrink:0}
.feat-sig-track{flex:1;height:8px;background:rgba(181,136,99,0.1);border-radius:4px;overflow:hidden}
.feat-sig-fill{
  height:100%;border-radius:4px;
  background:var(--fc);
  width:0;
}
.features-grid.visible .feat-sig-fill{
  animation:sigGrow 1.2s ease-out var(--delay) forwards;
}
@keyframes sigGrow{to{width:var(--fw)}}

/* curves SVG */
.feat-curves{width:140px;height:80px}

/* gauge */
.feat-gauge{width:120px;height:70px}
.gauge-needle{
  transform-origin:60px 60px;
  animation:needleSwing 4s ease-in-out infinite;
}
@keyframes needleSwing{
  0%,100%{transform:rotate(0deg)}
  30%{transform:rotate(-15deg)}
  60%{transform:rotate(10deg)}
  80%{transform:rotate(-5deg)}
}

/* ======================================================= METHODOLOGY */

.method-section{padding:80px 0 40px;max-width:760px;margin:0 auto}
.method-block{margin-bottom:40px}
.method-card{
  background:var(--glass-2);backdrop-filter:blur(14px) saturate(1.1);
  border:1px solid rgba(181,136,99,0.1);border-radius:14px;
  padding:32px 28px;position:relative;
}

/* Chessboard strip on method cards */
.method-card::after{
  content:'';position:absolute;bottom:0;left:0;right:0;height:4px;
  background:
    repeating-conic-gradient(
      var(--dark-sq) 0% 25%,
      var(--light-sq) 0% 50%
    ) 0 0 / 8px 8px;
  opacity:0.45;
  border-radius:0 0 14px 14px;
}

.method-card p{font-size:16px;line-height:1.7;color:var(--fg-2);margin-bottom:14px}
.method-card p:last-child{margin-bottom:0}
.method-tag{
  display:inline-block;font:600 10px var(--font-display);letter-spacing:0.15em;text-transform:uppercase;
  color:var(--gold);background:rgba(212,160,52,0.08);border:1px solid rgba(212,160,52,0.15);
  border-radius:6px;padding:4px 12px;margin-bottom:14px;
}
.method-card h3{font:600 22px var(--font-display);color:var(--fg);margin-bottom:14px}

/* challenges grid */
.method-challenges{display:flex;flex-direction:column;gap:16px;margin:20px 0 8px}
.method-challenge{display:flex;gap:14px;align-items:flex-start}
.mc-icon{width:40px;height:40px;flex-shrink:0}
.method-challenge p{font-size:14px;margin:2px 0 0;color:var(--fg-2)}
.method-challenge strong{color:var(--fg);font-size:14px}

/* formula flow */
.method-formula{
  display:flex;align-items:center;justify-content:center;gap:12px;
  margin:24px 0;flex-wrap:wrap;
}
.mf-box{
  background:rgba(181,136,99,0.05);border:1px solid rgba(181,136,99,0.12);
  border-radius:12px;padding:14px 18px;text-align:center;min-width:120px;
}
.mf-result{border-color:rgba(212,160,52,0.25);background:rgba(212,160,52,0.06)}
.mf-label{font:500 9px var(--font-display);letter-spacing:0.1em;text-transform:uppercase;color:var(--fg-3);margin-bottom:6px}
.mf-val{font:700 24px var(--font-mono);color:var(--fg)}
.mf-desc{font:400 11px var(--font-body);color:var(--fg-3);margin-top:4px}
.mf-arrow{font-size:22px;color:var(--fg-3);flex-shrink:0}

/* signals grid */
.method-signals-grid{
  display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin:20px 0 8px;
}
.ms-item{
  background:rgba(181,136,99,0.04);border:1px solid rgba(181,136,99,0.08);
  border-radius:10px;padding:14px;
}
.ms-head{display:flex;align-items:center;gap:8px;margin-bottom:6px}
.ms-icon{width:24px;height:24px;flex-shrink:0}
.ms-item p{font-size:13px;line-height:1.55;color:var(--fg-2);margin:0}
.ms-item strong{font-size:13px;color:var(--fg)}

/* baseline viz */
.method-baseline-viz{
  display:flex;gap:24px;margin:20px 0;align-items:center;flex-wrap:wrap;
}
.mb-chart{flex:1;min-width:260px}
.mb-title{font:500 10px var(--font-display);letter-spacing:0.1em;text-transform:uppercase;color:var(--fg-3);margin-bottom:8px;text-align:center}
.mb-svg{width:100%;max-width:300px;display:block;margin:0 auto}
.mb-stats{display:flex;flex-direction:column;gap:12px;flex-shrink:0}
.mb-stat{text-align:center;padding:10px 16px;background:rgba(181,136,99,0.05);border-radius:10px;border:1px solid rgba(181,136,99,0.1)}
.mb-num{font:700 22px var(--font-mono);color:var(--gold)}
.mb-label{font:400 10px var(--font-display);letter-spacing:0.08em;text-transform:uppercase;color:var(--fg-3);margin-top:2px}

/* waterfall chart */
.method-waterfall{margin:20px 0}
.mw-row{display:flex;align-items:center;gap:10px;margin-bottom:8px}
.mw-name{font:500 12px var(--font-body);color:var(--fg-2);width:110px;text-align:right;flex-shrink:0}
.mw-bar-wrap{flex:1;position:relative;height:24px}
.mw-bar{
  position:absolute;height:100%;border-radius:6px;
  display:flex;align-items:center;padding:0 10px;
  font:600 11px var(--font-mono);color:#fff;white-space:nowrap;
  width:0;
}
.mw-pos{background:linear-gradient(90deg,rgba(106,154,80,0.8),rgba(106,154,80,0.4));left:50%}
.mw-neg{background:linear-gradient(270deg,rgba(196,80,64,0.8),rgba(196,80,64,0.4));right:50%;direction:rtl}
.mw-total{border-top:1px solid rgba(181,136,99,0.15);padding-top:8px;margin-top:4px}
.mw-total .mw-name{font-weight:700;color:var(--fg)}
.method-section.visible .mw-bar{animation:barGrow 0.8s ease-out forwards}
@keyframes barGrow{to{width:var(--w)}}

/* pipeline */
.method-pipeline{margin:20px 0}
.mp-step{display:flex;gap:14px;align-items:flex-start}
.mp-num{
  width:28px;height:28px;border-radius:50%;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;
  font:700 12px var(--font-mono);color:var(--gold);
  background:rgba(212,160,52,0.1);border:1px solid rgba(212,160,52,0.2);
}
.mp-body{padding:2px 0 0}
.mp-body strong{font-size:14px;color:var(--fg);display:block;margin-bottom:2px}
.mp-body p{font-size:14px;color:var(--fg-2);margin:0;line-height:1.55}
.mp-arrow{text-align:center;color:var(--fg-3);font-size:16px;margin:4px 0 4px 7px;opacity:0.4}

/* cta row */
.method-cta-row{display:flex;gap:14px;justify-content:center;align-items:center;flex-wrap:wrap}

@media(max-width:600px){
  .method-signals-grid{grid-template-columns:1fr}
  .method-formula{flex-direction:column}
  .mf-arrow{transform:rotate(90deg)}
  .method-baseline-viz{flex-direction:column}
}

/* ======================================================= VALIDATION GRID */

.method-validation-grid{
  display:grid;grid-template-columns:1fr 1fr 1fr;gap:20px;margin:20px 0;
}
.mv-category h4{
  font:600 13px var(--font-display);color:var(--fg-2);
  text-transform:uppercase;letter-spacing:0.08em;
  margin-bottom:10px;padding-bottom:6px;
  border-bottom:2px solid rgba(181,136,99,0.15);
}
.mv-items{display:flex;flex-direction:column;gap:8px}
.mv-item{
  display:flex;gap:10px;align-items:baseline;
  padding:8px 10px;border-radius:8px;
  background:rgba(26,14,8,0.4);
  border-left:3px solid transparent;
}
.mv-item.mv-good{border-left-color:var(--emerald)}
.mv-item.mv-flagged{border-left-color:var(--red)}
.mv-item.mv-warn{border-left-color:var(--gold)}
.mv-item.mv-stat{border-left-color:var(--cyan)}
.mv-val{
  font:600 14px var(--font-mono);white-space:nowrap;flex-shrink:0;min-width:70px;
}
.mv-good .mv-val{color:var(--emerald)}
.mv-flagged .mv-val{color:var(--red)}
.mv-warn .mv-val{color:var(--gold)}
.mv-stat .mv-val{color:var(--cyan)}
.mv-desc{font-size:13px;color:var(--fg-3);line-height:1.45}

@media(max-width:900px){
  .method-validation-grid{grid-template-columns:1fr}
}

/* ======================================================= LANDING FOOTER */

.landing-footer{
  margin-top:60px;padding:30px 0 40px;
  border-top:1px solid rgba(181,136,99,0.1);text-align:center;
  position:relative;
}
/* Full-width chessboard strip in footer */
.landing-footer::before{
  content:'';position:absolute;top:-1px;left:0;right:0;
  height:6px;
  background:
    repeating-conic-gradient(
      var(--dark-sq) 0% 25%,
      var(--light-sq) 0% 50%
    ) 0 0 / 12px 12px;
  opacity:0.4;
}
.footer-inner{opacity:0.5}
.footer-inner p{font-size:13px;color:var(--fg-3);margin-top:6px}

/* ======================================================= CASES SECTION */

.cases-section{padding:60px 0 20px}

/* ======================================================= FORM */

.side-h{font:600 10px var(--font-display);letter-spacing:0.2em;text-transform:uppercase;color:var(--fg-3);margin:22px 0 10px}

.seg{display:flex;gap:3px;margin-bottom:20px;flex-wrap:wrap;background:rgba(181,136,99,0.04);border-radius:10px;padding:3px}
.seg button{
  flex:1;background:transparent;border:1px solid transparent;
  color:var(--fg-3);padding:7px 6px;font:500 11px var(--font-body);border-radius:7px;cursor:pointer;
  transition:all 0.2s ease;white-space:nowrap;
}
.seg button:hover{color:var(--fg)}
.seg button[aria-selected="true"]{
  background:rgba(181,136,99,0.12);
  border-color:rgba(181,136,99,0.18);color:var(--fg);
  box-shadow:0 1px 4px rgba(0,0,0,0.25);
}

label.fld{display:block;margin-bottom:12px}
label.fld>span{display:block;font-size:11px;color:var(--fg-3);margin-bottom:4px;font-weight:500}

input[type="text"],input[type="number"],select{
  width:100%;background:rgba(181,136,99,0.06);color:var(--fg);
  border:1px solid rgba(181,136,99,0.12);border-radius:8px;padding:9px 12px;
  font:400 13px var(--font-body);outline:none;
  transition:border-color 0.2s,box-shadow 0.2s;
}
input:focus,select:focus{border-color:rgba(212,160,52,0.4);box-shadow:0 0 0 2px rgba(212,160,52,0.1)}
input[type="file"]{font:400 11px var(--font-body);color:var(--fg-2);width:100%}

textarea{
  width:100%;background:rgba(181,136,99,0.06);color:var(--fg);
  border:1px solid rgba(181,136,99,0.12);border-radius:8px;padding:12px;
  font:400 12px var(--font-mono);line-height:1.6;resize:vertical;min-height:110px;outline:none;
  transition:border-color 0.2s,box-shadow 0.2s;
}
textarea:focus{border-color:rgba(212,160,52,0.4);box-shadow:0 0 0 2px rgba(212,160,52,0.1)}
textarea::placeholder{color:var(--fg-3)}
select{appearance:none;padding-right:28px;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%238a6d50'%3E%3Cpath d='M2 4l4 4 4-4'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 10px center}

.chk{display:flex;gap:8px;align-items:center;margin-bottom:12px;font-size:12px;color:var(--fg-2)}
.chk input{accent-color:var(--gold)}

.hint{color:var(--fg-2);font-size:14px;margin:-4px 0 14px;line-height:1.5}

.btn-cosmic{
  display:block;width:100%;padding:14px 24px;border:0;border-radius:10px;
  font:600 13px var(--font-display);letter-spacing:0.1em;text-transform:uppercase;
  color:#fff;cursor:pointer;position:relative;overflow:hidden;
  background:linear-gradient(135deg,var(--oak),var(--dark-sq),var(--gold));
  background-size:300% 300%;animation:gradientShift 6s ease infinite;
  box-shadow:0 2px 16px rgba(90,58,36,0.35),inset 0 1px 0 rgba(240,217,181,0.1);
  transition:transform 0.2s,box-shadow 0.3s;
}
.btn-cosmic:hover{transform:translateY(-1px);box-shadow:0 4px 24px rgba(181,136,99,0.3)}
.btn-cosmic:active{transform:translateY(0)}
.btn-cosmic:disabled{opacity:0.4;cursor:not-allowed;transform:none;animation:none}
@keyframes gradientShift{0%{background-position:0% 50%}50%{background-position:100% 50%}100%{background-position:0% 50%}}

.btn-ghost{
  display:inline-flex;align-items:center;gap:6px;
  background:rgba(181,136,99,0.06);border:1px solid rgba(181,136,99,0.15);
  color:var(--fg-2);padding:8px 16px;font:500 11px var(--font-body);
  border-radius:8px;cursor:pointer;transition:all 0.2s ease;
}
.btn-ghost:hover{color:var(--fg);border-color:rgba(181,136,99,0.3);background:rgba(181,136,99,0.1)}
a.btn-ghost{text-decoration:none}

/* ======================================================= NOTICES */

.notice{
  background:var(--glass-2);backdrop-filter:blur(12px);
  border:1px solid rgba(181,136,99,0.12);border-radius:14px;
  padding:16px 20px;margin-bottom:14px;font-size:15px;color:var(--fg-2);
  animation:fadeUp 0.4s ease both;
}
.notice.err{border-color:rgba(196,80,64,0.3);box-shadow:0 0 30px rgba(196,80,64,0.06)}
.notice.warn{border-color:rgba(212,160,52,0.3)}
.notice strong{color:var(--fg)}

/* ======================================================= PROGRESS */

/* full-screen scanning overlay */
#progwrap{
  position:fixed;inset:0;z-index:200;
  display:flex;align-items:center;justify-content:center;
  background:rgba(26,14,8,0.96);
}
#progwrap[hidden]{display:none}
#scan-boards{
  position:absolute;inset:0;
  display:flex;align-items:center;justify-content:center;
  pointer-events:none;
}
.scan-board-grid{
  display:grid;grid-template-columns:repeat(8,1fr);
  width:min(520px,70vw);aspect-ratio:1;
  filter:blur(5px);opacity:0;
  animation:boardFadeIn 0.6s ease 0.2s forwards;
}
@keyframes boardFadeIn{to{opacity:0.3}}
.scan-cell{
  aspect-ratio:1;display:flex;align-items:center;justify-content:center;
  font-size:clamp(24px,5vw,48px);line-height:1;
  transition:color 0.1s;
}
.scan-cell.light{background:rgba(240,217,181,0.1)}
.scan-cell.dark{background:rgba(181,136,99,0.15)}
.scan-cell.w{color:rgba(245,230,208,0.85)}
.scan-cell.b{color:rgba(90,58,36,0.9)}

.scan-center{
  position:relative;z-index:2;
  display:flex;flex-direction:column;align-items:center;
  width:min(500px,85vw);
}
.scan-status-text{
  font:500 13px var(--font-display);letter-spacing:0.1em;text-transform:uppercase;
  color:var(--fg-3);margin-bottom:24px;text-align:center;
  animation:statusPulse 2s ease-in-out infinite;
}
@keyframes statusPulse{0%,100%{opacity:0.5}50%{opacity:1}}

#progtrack{height:3px;background:rgba(181,136,99,0.1);border-radius:2px;overflow:visible;position:relative;width:100%}
#progfill{
  height:100%;width:0%;border-radius:2px;position:relative;
  background:linear-gradient(90deg,var(--oak),var(--dark-sq),var(--gold));
  background-size:200% 100%;animation:gradientShift 3s ease infinite;
  transition:width 0.3s ease;
  box-shadow:0 0 12px rgba(181,136,99,0.2),0 0 24px rgba(212,160,52,0.15);
}
#progfill::after{
  content:'';position:absolute;right:-5px;top:-5px;width:13px;height:13px;
  background:var(--gold);border-radius:50%;
  box-shadow:0 0 15px rgba(212,160,52,0.3),0 0 30px rgba(212,160,52,0.2);
  animation:pulse 1.5s ease infinite;
}
@keyframes pulse{0%,100%{transform:scale(1);opacity:1}50%{transform:scale(1.5);opacity:0.5}}
#progtext{font:400 11px var(--font-mono);color:var(--fg-3);margin-top:10px;text-align:center}
.spin{display:inline-block;width:10px;height:10px;border:1.5px solid rgba(181,136,99,0.2);border-top-color:var(--gold);border-radius:50%;animation:sp 0.7s linear infinite;margin-right:6px}
@keyframes sp{to{transform:rotate(360deg)}}

/* ======================================================= GAME HEADER */

#gamehead{text-align:center;padding:20px 0 24px}
#gamehead .names{
  font:700 clamp(24px,4vw,44px)/1.1 var(--font-display);
  background:linear-gradient(135deg,var(--fg),var(--gold),var(--dark-sq));
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;
  filter:drop-shadow(0 0 30px rgba(212,160,52,0.15));
}
#gamehead .vs{
  -webkit-text-fill-color:var(--fg-3);font-size:0.4em;padding:0 10px;
  font-weight:400;vertical-align:middle;
}
#gamehead .elo{
  -webkit-text-fill-color:var(--fg-3);
  font:400 clamp(12px,1.5vw,16px) var(--font-mono);
  padding-left:6px;
}
#gamehead .meta{color:var(--fg-3);font-size:12px;margin-top:8px}

/* ======================================================= CARDS */

.card{
  background:var(--glass-2);backdrop-filter:blur(16px) saturate(1.2);
  border:1px solid rgba(181,136,99,0.1);border-radius:14px;
  padding:28px 30px;margin-bottom:18px;
  position:relative;overflow:hidden;
  transition:border-color 0.3s,box-shadow 0.3s,transform 0.3s;
}
.card:hover{
  border-color:rgba(212,160,52,0.18);
  box-shadow:0 0 40px rgba(181,136,99,0.06),0 20px 60px rgba(0,0,0,0.3);
  transform:translateY(-3px);
}
.card::after{
  content:'';position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(212,160,52,0.25),rgba(181,136,99,0.15),transparent);
}

.grid2{display:grid;grid-template-columns:1fr 1fr;gap:18px}
@media(max-width:1000px){.grid2{grid-template-columns:1fr}}

.card h3{font:600 15px var(--font-display);margin:0 0 4px}
.card h3 .qual{color:var(--fg-3);font-weight:400}
.card .sub{color:var(--fg-3);font-size:12px;margin:0 0 16px}

h2.sec{
  font:700 clamp(20px,3vw,30px) var(--font-display);
  text-align:center;margin:50px 0 8px;
  background:linear-gradient(135deg,var(--dark-sq),var(--gold));
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;
  position:relative;padding-bottom:14px;
}
h2.sec::after{
  content:'';position:absolute;bottom:0;left:50%;transform:translateX(-50%);
  width:64px;height:4px;
  background:
    repeating-conic-gradient(
      var(--dark-sq) 0% 25%,
      var(--light-sq) 0% 50%
    ) 0 0 / 8px 8px;
  opacity:0.5;border-radius:1px;
}
p.secsub{text-align:center;color:var(--fg-2);font-size:16px;margin:0 auto 22px;max-width:60ch}

/* scroll reveal */
.reveal{opacity:0;transform:translateY(28px);transition:opacity 0.7s ease,transform 0.7s ease}
.reveal.visible{opacity:1;transform:none}

/* ======================================================= BOARD SECTION */

.board-section{
  display:flex;gap:24px;align-items:start;justify-content:center;
  margin:0 auto;max-width:900px;
}
@media(max-width:800px){.board-section{flex-direction:column;align-items:center}}

.board-center{width:100%;max-width:520px;flex-shrink:0}

#board-area{display:flex;gap:0;align-items:stretch}
#board-wrap{position:relative;flex:1;border-radius:8px;overflow:hidden;box-shadow:0 0 40px rgba(0,0,0,0.5),0 0 0 2px rgba(181,136,99,0.2)}
#board{width:100%}

/* Eval bar */
#eval-bar{
  width:28px;flex-shrink:0;position:relative;
  background:var(--mahogany);border-radius:4px 0 0 4px;overflow:hidden;
  border:1px solid rgba(181,136,99,0.1);
}
#eval-fill{
  position:absolute;bottom:0;left:0;right:0;height:50%;
  background:var(--cream);transition:height 0.4s ease;
}
#eval-text{
  position:absolute;left:0;right:0;text-align:center;
  font:700 9px var(--font-mono);color:var(--mahogany);z-index:1;
  transition:bottom 0.4s ease;bottom:42%;
}

.replay-controls{display:flex;gap:4px;margin-top:10px}
.replay-controls button{
  flex:1;background:rgba(181,136,99,0.08);border:1px solid rgba(181,136,99,0.12);
  color:var(--fg-2);padding:10px 0;font-size:16px;border-radius:8px;cursor:pointer;
  transition:all 0.2s;
}
.replay-controls button:hover{background:rgba(212,160,52,0.15);border-color:var(--gold);color:var(--cream)}

input[type="range"]{width:100%;appearance:none;background:transparent;height:20px;cursor:pointer;margin-top:8px}
input[type="range"]::-webkit-slider-runnable-track{height:3px;background:rgba(181,136,99,0.15);border-radius:2px}
input[type="range"]::-webkit-slider-thumb{appearance:none;width:16px;height:16px;background:var(--gold);border:2px solid var(--void);border-radius:50%;margin-top:-7px;box-shadow:0 0 12px rgba(212,160,52,0.2);transition:transform 0.15s}
input[type="range"]::-webkit-slider-thumb:hover{transform:scale(1.3)}
input[type="range"]::-moz-range-track{height:3px;background:rgba(181,136,99,0.15);border-radius:2px}
input[type="range"]::-moz-range-thumb{width:14px;height:14px;background:var(--gold);border:2px solid var(--void);border-radius:50%;box-shadow:0 0 12px rgba(212,160,52,0.2)}

/* ======================================================= MOVE LIST */

.ml-wrap{
  background:var(--glass-2);backdrop-filter:blur(16px) saturate(1.2);
  border:1px solid rgba(181,136,99,0.1);border-radius:14px;
  overflow:hidden;width:280px;flex-shrink:0;
}
@media(max-width:800px){.ml-wrap{width:100%;max-width:520px}}
.ml-header{
  padding:10px 14px;border-bottom:1px solid rgba(181,136,99,0.1);
  font:600 12px var(--font-display);color:var(--fg-2);
}
.ml-body{
  max-height:460px;overflow-y:auto;scrollbar-width:thin;
  scrollbar-color:rgba(181,136,99,0.25) transparent;
}
.ml-row{
  display:flex;align-items:center;
  border-bottom:1px solid rgba(181,136,99,0.05);
}
.ml-num{
  width:36px;text-align:right;padding:6px 6px 6px 8px;
  font:500 11px var(--font-mono);color:var(--fg-3);flex-shrink:0;
}
.ml-move{
  flex:1;padding:6px 10px;cursor:pointer;
  font:500 13px var(--font-mono);color:var(--fg);
  transition:background 0.15s;
  border-left:1px solid rgba(181,136,99,0.05);
}
.ml-move:hover{background:rgba(212,160,52,0.1)}
.ml-move.active{background:rgba(212,160,52,0.2);color:var(--cream)}

/* ======================================================= VERDICT CARDS */

.verdict-card{text-align:center}
.verdict-elo{font:400 12px var(--font-mono);color:var(--fg-3);margin-bottom:12px}

.traffic-light{display:flex;flex-direction:column;align-items:center;gap:8px;margin:16px 0}
.light-dot{width:48px;height:48px;border-radius:50%;transition:all 0.5s}
.light-label{font:500 14px var(--font-body);color:var(--fg-2)}
.light-green .light-label{color:var(--emerald)}
.light-yellow .light-label{color:var(--gold)}
.light-red .light-label{color:var(--red)}

.acc-ring-wrap{display:flex;justify-content:center;padding:10px 0}
.acc-ring{width:160px;height:160px}
.acc-bg{fill:none;stroke:rgba(181,136,99,0.1);stroke-width:7}
.acc-val{fill:none;stroke-width:7;stroke-linecap:round;transition:stroke-dashoffset 1.5s}
.acc-num{font:700 36px var(--font-display);fill:var(--fg);text-anchor:middle;dominant-baseline:central}
.acc-label{font:500 8px var(--font-display);letter-spacing:0.18em;fill:var(--fg-3);text-anchor:middle}

.verdict-detail{
  display:flex;justify-content:center;gap:20px;
  font-size:12px;color:var(--fg-2);margin:12px 0 6px;
}
.verdict-detail strong{color:var(--fg)}
.verdict-interp{
  text-align:center;font-size:12px;color:var(--fg-3);
  margin-top:8px;padding-top:8px;border-top:1px solid rgba(181,136,99,0.1);
  line-height:1.6;
}

/* ======================================================= ENGINE AGREEMENT */

#agreement-bars{margin:14px 0 8px}
.agree-row{display:flex;align-items:center;gap:12px;margin-bottom:10px}
.agree-name{font:500 12px var(--font-body);color:var(--fg-2);width:120px;text-align:right;flex-shrink:0}
.agree-track{flex:1;height:18px;background:rgba(181,136,99,0.08);border-radius:9px;position:relative;overflow:visible}
.agree-fill{height:100%;border-radius:9px;background:linear-gradient(90deg,var(--oak),var(--gold));transition:width 0.8s ease;box-shadow:0 0 12px rgba(212,160,52,0.15)}
.agree-marker{position:absolute;top:-4px;width:3px;height:26px;background:var(--fg);border-radius:2px;transform:translateX(-50%);box-shadow:0 0 8px rgba(245,230,208,0.2)}
.agree-pct{font:600 13px var(--font-mono);color:var(--fg);width:55px;flex-shrink:0}
.agree-legend{display:flex;align-items:center;gap:12px;font-size:11px;color:var(--fg-3);justify-content:center;margin-top:4px}
.agree-leg-fill{width:14px;height:8px;border-radius:4px;background:linear-gradient(90deg,var(--oak),var(--gold))}
.agree-leg-marker{width:3px;height:14px;background:var(--fg);border-radius:2px}

/* ======================================================= EVIDENCE */

.evidence-details{
  background:var(--glass-2);border:1px solid rgba(181,136,99,0.1);
  border-radius:14px;overflow:hidden;
}
.evidence-summary{
  padding:18px 28px;font:600 14px var(--font-display);color:var(--fg-2);
  cursor:pointer;list-style:none;
  transition:color 0.2s;
}
.evidence-summary:hover{color:var(--fg)}
.evidence-summary::marker,.evidence-summary::-webkit-details-marker{display:none}
.evidence-summary::before{content:'+ ';font:500 16px var(--font-mono);color:var(--gold)}
.evidence-details[open] .evidence-summary::before{content:'- '}
.evidence-details[open] .evidence-summary{border-bottom:1px solid rgba(181,136,99,0.1)}
.evidence-details .grid2{padding:0 14px}
.evidence-details .card{box-shadow:none;border:1px solid rgba(181,136,99,0.08)}

.ev-row{display:flex;justify-content:space-between;padding:6px 0;border-bottom:1px solid rgba(181,136,99,0.06);font-size:12px}
.ev-label{color:var(--fg-2)}
.ev-val{font:500 12px var(--font-mono);color:var(--fg)}

/* ======================================================= CHARTS */

.chart{width:100%;height:360px}.chart.tall{height:440px}.chart.short{height:260px}

/* ======================================================= TABLES */

.scroll-x{overflow-x:auto;-webkit-overflow-scrolling:touch}
.tbl{width:100%;border-collapse:collapse;font-size:14px;color:var(--fg-2)}
.tbl thead{border-bottom:1px solid rgba(181,136,99,0.15)}
.tbl th{font:500 12px var(--font-display);letter-spacing:0.1em;text-transform:uppercase;color:var(--fg-3);padding:8px 10px;text-align:left}
.tbl td{padding:7px 10px;border-bottom:1px solid rgba(181,136,99,0.06)}
.tbl th.num,.tbl td.num{text-align:right;font-family:var(--font-mono)}
.tbl tbody tr:hover{background:rgba(181,136,99,0.06)}

/* Alternating row tint — subtle chessboard rows */
.tbl tbody tr:nth-child(even){background:rgba(181,136,99,0.03)}
.tbl tbody tr:nth-child(even):hover{background:rgba(181,136,99,0.08)}

/* ======================================================= SIGNAL BARS (scan) */

.sig-bar-row{display:flex;align-items:center;gap:10px;margin-bottom:8px}
.sig-bar-name{font:500 12px var(--font-body);color:var(--fg-2);width:150px;text-align:right;flex-shrink:0;text-transform:capitalize}
.sig-bar-track{flex:1;height:14px;background:rgba(181,136,99,0.08);border-radius:7px;overflow:hidden}
.sig-bar-fill{height:100%;border-radius:7px;transition:width 0.6s ease;min-width:3px}
.sig-bar-val{font:500 13px var(--font-mono);width:140px;flex-shrink:0}

/* ======================================================= MISC */

.empty{color:var(--fg-3);font-size:13px;font-style:italic}
.caveat{background:rgba(212,160,52,0.04);border:1px solid rgba(212,160,52,0.15);border-radius:10px;padding:10px 14px;font-size:12px;color:var(--fg-2);margin:8px 0;line-height:1.6}
.row{display:flex;gap:8px;align-items:center;flex-wrap:wrap}

@keyframes fadeUp{from{opacity:0;transform:translateY(15px)}to{opacity:1;transform:none}}
.fade-in{animation:fadeUp 0.4s ease both}
.fade-in:nth-child(2){animation-delay:0.08s}
.fade-in:nth-child(3){animation-delay:0.16s}

.badge{display:inline-block;font:600 12px var(--font-display);letter-spacing:0.1em;padding:3px 9px;border-radius:6px}
.badge.suspect{background:rgba(196,80,64,0.15);color:var(--red)}
.badge.ok{background:rgba(106,154,80,0.15);color:var(--emerald)}
.badge.neutral{background:rgba(212,160,52,0.15);color:var(--gold)}

.stats{display:flex;gap:28px;flex-wrap:wrap;margin-top:18px}
.stat .k{font:500 11px var(--font-display);letter-spacing:0.15em;text-transform:uppercase;color:var(--fg-3);margin-bottom:3px}
.stat .v{font:500 20px var(--font-mono)}

/* ======================================================= SCAN ANIMATION */

.scan-anim{
  width:160px;height:160px;margin:0 auto 28px;position:relative;
  display:flex;align-items:center;justify-content:center;
}
.scan-ring{
  position:absolute;border-radius:50%;
  border:2px solid transparent;pointer-events:none;
}
.ring-1{
  inset:0;
  border-top-color:var(--gold);border-bottom-color:var(--gold);
  animation:scanSpin 2.4s linear infinite;
  filter:drop-shadow(0 0 8px rgba(212,160,52,0.3));
}
.ring-2{
  inset:14px;
  border-left-color:var(--dark-sq);border-right-color:var(--dark-sq);
  animation:scanSpin 3.2s linear infinite reverse;
  filter:drop-shadow(0 0 8px rgba(181,136,99,0.3));
}
.ring-3{
  inset:28px;
  border-top-color:rgba(212,160,52,0.4);border-bottom-color:rgba(181,136,99,0.4);
  animation:scanSpin 1.8s linear infinite;
}
.scan-icon{
  font-size:48px;color:var(--cream);
  animation:scanPulse 2s ease-in-out infinite;
  filter:drop-shadow(0 0 12px rgba(212,160,52,0.2));
  z-index:1;
}
@keyframes scanSpin{to{transform:rotate(360deg)}}
@keyframes scanPulse{0%,100%{opacity:0.7;transform:scale(1)}50%{opacity:1;transform:scale(1.08)}}

/* ======================================================= CASE STUDIES */

/* ---- 2×3 grid layout ---- */
.case-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:24px;
}
@media(max-width:1200px){.case-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:720px){.case-grid{grid-template-columns:1fr}}

/* ---- case group (tile wrapper) ---- */
.case-group{opacity:0;transform:translateY(20px);transition:opacity 0.6s ease,transform 0.6s ease}
.case-grid.visible .case-group{opacity:1;transform:none}
.case-grid.visible .case-group:nth-child(2){transition-delay:0.1s}
.case-grid.visible .case-group:nth-child(3){transition-delay:0.2s}
.case-grid.visible .case-group:nth-child(4){transition-delay:0.3s}
.case-grid.visible .case-group:nth-child(5){transition-delay:0.4s}
.case-grid.visible .case-group:nth-child(6){transition-delay:0.5s}
.case-group-header{
  display:flex;align-items:center;gap:10px;margin-bottom:6px;
}
.case-group-num{
  font:700 10px var(--font-display);letter-spacing:0.12em;
  color:var(--gold);white-space:nowrap;
  background:rgba(181,136,99,0.08);border:1px solid rgba(181,136,99,0.15);
  border-radius:8px;padding:4px 10px;
}
.case-group-title{
  font:600 15px var(--font-display);color:var(--fg);margin:0;
}
.case-group-sub{color:var(--fg-3);font-size:11px;margin-bottom:4px}
.case-group-narrative{
  font-size:12.5px;color:var(--fg-2);line-height:1.6;
  margin-bottom:10px;
  max-height:6.4em;overflow-y:auto;
}

/* ---- case card (stacked: board on top, info below) ---- */
.case-card{
  display:flex;flex-direction:column;gap:16px;
  background:var(--glass-2);backdrop-filter:blur(14px) saturate(1.1);
  border:1px solid rgba(181,136,99,0.1);border-radius:14px;
  padding:16px;position:relative;overflow:hidden;
  transition:border-color 0.3s,box-shadow 0.3s;
  height:100%;
}
.case-card::before{
  content:'';position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(212,160,52,0.2),transparent);
}
.case-card:hover{
  border-color:rgba(181,136,99,0.2);
  box-shadow:0 0 40px rgba(90,58,36,0.08),0 20px 60px rgba(0,0,0,0.25);
}

.case-info-col{display:flex;flex-direction:column;flex:1}
.case-info-col .case-group-header{margin-bottom:4px}
.case-info-col .case-group-sub{margin-bottom:6px}
.case-info-col .case-group-narrative{margin-bottom:10px}

.case-board-col{display:flex;flex-direction:column;gap:6px}

.board-player{
  display:flex;align-items:center;justify-content:space-between;
  padding:6px 10px;
  background:rgba(26,14,8,0.5);
  border:1px solid rgba(181,136,99,0.08);
}
.board-player--top{border-radius:8px 8px 0 0;border-bottom:none}
.board-player--bottom{border-radius:0 0 8px 8px;border-top:none}
.board-player-name{
  font:600 12px var(--font-body);color:var(--fg);
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.board-player-elo{
  font:400 11px var(--font-mono);color:var(--fg-3);flex-shrink:0;margin-left:8px;
}

.case-board-wrap{border-radius:0;overflow:hidden;box-shadow:0 0 30px rgba(0,0,0,0.4)}
.case-controls{
  display:flex;gap:3px;
}
.case-controls button{
  flex:1;background:rgba(181,136,99,0.08);border:1px solid rgba(181,136,99,0.1);
  color:var(--fg-3);padding:7px 0;font-size:14px;
  cursor:pointer;border-radius:6px;transition:color 0.2s,background 0.2s;
}
.case-controls button:hover{color:var(--fg);background:rgba(181,136,99,0.15)}
.case-ply{
  font:400 11px var(--font-mono);color:var(--fg-3);text-align:center;
}
.case-game-select{
  width:100%;margin-top:2px;
}
.case-game-label{
  font-size:11px;color:var(--fg-3);text-align:center;line-height:1.4;
}

/* ---- case group meta (stats + details above grid) ---- */
.case-group-meta{margin-bottom:20px}
.case-stats{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:12px}
.case-stat{
  padding:8px 14px;
  background:rgba(181,136,99,0.05);border:1px solid rgba(181,136,99,0.1);
  border-radius:10px;
}
.case-stat.highlight{
  border-color:rgba(196,80,64,0.3);background:rgba(196,80,64,0.06);
}
.cs-val{font:600 16px var(--font-mono);color:var(--fg);display:block}
.cs-label{font-size:10px;color:var(--fg-3);letter-spacing:0.05em}
.case-detail{font-size:11.5px;color:var(--fg-2);margin-bottom:4px;line-height:1.55}
.case-detail strong{color:var(--fg)}

/* ---- clean (counter-example) modifiers ---- */
.case-group--clean .case-group-num{
  color:var(--emerald);
  background:rgba(106,154,80,0.08);border-color:rgba(106,154,80,0.15);
}
.case-group--clean .case-stat.highlight{
  border-color:rgba(106,154,80,0.3);background:rgba(106,154,80,0.06);
}
.case-group--clean .case-card{
  border-color:rgba(106,154,80,0.1);
}
.case-group--clean .case-card:hover{
  border-color:rgba(106,154,80,0.2);
  box-shadow:0 0 40px rgba(106,154,80,0.06),0 20px 60px rgba(0,0,0,0.2);
}
.case-group--clean .case-card::before{
  background:linear-gradient(90deg,transparent,rgba(106,154,80,0.2),transparent);
}

.cases-note{
  text-align:center;font-size:11px;color:var(--fg-3);
  margin-top:36px;max-width:60ch;margin-left:auto;margin-right:auto;
  line-height:1.6;padding-bottom:40px;
}

/* ======================================================= PLAYER PROFILE (scan) */

.profile-stats{
  display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:16px;
}
@media(max-width:600px){.profile-stats{grid-template-columns:repeat(2,1fr)}}
.profile-stat{
  text-align:center;padding:18px 10px;
  background:rgba(181,136,99,0.05);border:1px solid rgba(181,136,99,0.1);
  border-radius:12px;transition:border-color 0.3s;
}
.profile-stat:hover{border-color:rgba(181,136,99,0.2)}
.ps-val{
  display:block;font:600 28px var(--font-mono);color:var(--fg);margin-bottom:4px;
}
.ps-label{
  font:500 12px var(--font-display);letter-spacing:0.08em;text-transform:uppercase;
  color:var(--fg-3);
}
.ps-desc{
  display:block;font:400 13px/1.5 var(--font-body);color:var(--fg-3);
  margin-top:8px;opacity:0.75;
}

/* ======================================================= CANCEL BUTTON */

.scan-cancel-btn{
  margin-top:18px;
  border-color:rgba(196,80,64,0.25);color:var(--red);
  transition:all 0.2s;
}
.scan-cancel-btn:hover{
  border-color:rgba(196,80,64,0.5);background:rgba(196,80,64,0.08);color:#fff;
}

/* ======================================================= SPEED BREAKDOWN */

.speed-grid{display:flex;gap:10px;flex-wrap:wrap;margin-top:12px}
.speed-chip{
  padding:10px 16px;
  background:rgba(181,136,99,0.05);border:1px solid rgba(181,136,99,0.1);
  border-radius:10px;text-align:center;min-width:100px;
}
.speed-chip .sc-speed{font:600 12px var(--font-display);color:var(--fg);text-transform:capitalize;margin-bottom:4px}
.speed-chip .sc-val{font:500 11px var(--font-mono);color:var(--fg-2)}

/* ======================================================= TEMPORAL CHART */

.temporal-note{
  display:inline-block;font:500 11px var(--font-body);color:var(--gold);
  background:rgba(212,160,52,0.06);border:1px solid rgba(212,160,52,0.15);
  border-radius:8px;padding:6px 12px;margin-top:8px;
}

/* ======================================================= SCAN GAME ANALYSE BUTTON */

.tbl .btn-analyse{
  font:500 10px var(--font-display);letter-spacing:0.06em;
  padding:4px 10px;border-radius:6px;cursor:pointer;
  background:rgba(212,160,52,0.08);border:1px solid rgba(212,160,52,0.2);
  color:var(--gold);transition:all 0.2s;white-space:nowrap;
}
.tbl .btn-analyse:hover{background:rgba(212,160,52,0.15);color:var(--cream)}

/* ======================================================= EXPORT BAR */

.export-bar{
  display:flex;gap:8px;flex-wrap:wrap;margin-top:16px;
}

/* ======================================================= DECORATIVE CHESS PIECES */

/* Scattered chess piece watermarks — easter eggs */
.features-section{position:relative}
.features-section::before{
  content:'\2656';  /* white rook */
  position:absolute;top:20px;right:30px;
  font-size:80px;opacity:0.02;pointer-events:none;
  transform:rotate(-15deg);
}
.cases-section::after{
  content:'\265E';  /* black knight */
  position:absolute;bottom:20px;left:20px;
  font-size:90px;opacity:0.025;pointer-events:none;
  transform:rotate(10deg);
}
.cases-section{position:relative;overflow:hidden}

/* Chessboard corner pattern in cards — easter egg */
.method-section .method-block:first-child .method-card::before{
  content:'';position:absolute;top:12px;right:12px;
  width:32px;height:32px;
  background:
    repeating-conic-gradient(
      rgba(181,136,99,0.08) 0% 25%,
      transparent 0% 50%
    ) 0 0 / 8px 8px;
  opacity:0.6;
  border-radius:4px;
}

/* ======================================================= MOBILE */

@media(max-width:700px){
  #topbar{padding:10px 16px}
  #stage{padding:0 12px}
  #app.has-results #stage{padding-top:16px}
  .hero-title{font-size:clamp(36px,8vw,56px)}
  .hero-desc{font-size:14px}
  .hero-actions{flex-direction:column;gap:10px}
  .hero-scroll{padding:14px 32px}
  .features-grid{grid-template-columns:1fr}
  .profile-stats{grid-template-columns:1fr 1fr}
  .card{padding:18px 16px;border-radius:14px}
  .board-section{flex-direction:column;align-items:center}
  .ml-wrap{width:100%;max-width:100%}
  .case-card{padding:16px;gap:12px}
  .grid2{grid-template-columns:1fr}
  .verdict-detail{flex-direction:column;gap:6px;align-items:center}
  .sig-bar-name{width:100px;font-size:10px}
  .sig-bar-val{width:110px;font-size:10px}
  .agree-name{width:80px;font-size:10px}
  .tbl{font-size:11px}
  .tbl th,.tbl td{padding:5px 6px}
  .modal-title{font-size:17px}
  #input-card{padding:20px 16px;border-radius:14px}
  .seg button{font-size:10px;padding:6px 4px}
  .speed-grid{flex-direction:column}
  .speed-chip{min-width:auto}
  .hero::before,.hero::after{display:none}
}
@media(max-width:400px){
  .profile-stats{grid-template-columns:1fr}
  .hero-title{font-size:32px}
  .nav-link{display:none}
}