:root{
  --bg:#1f2f40;
  --bg-deep:#152739;
  --fg:#e4edf3;
  --muted:#9db0bc;
  --muted-2:#c4d2d9;
  --accent:#cc6433;
  --gold:#d7a243;
  --panel:rgba(255,255,255,.022);
  --panel-2:rgba(255,255,255,.03);
  --line:rgba(228,237,243,.135);
  --soft-line:rgba(228,237,243,.07);
  --max:1260px;
  --header:72px;
  --phase-col:270px;
  --study-col:355px;
  --learn-col:270px;
  --next-col:270px;
}
html[data-theme="light"]{
  --bg:#efe5d2;
  --bg-deep:#e7d9c0;
  --fg:#241c15;
  --muted:#6d5b4e;
  --muted-2:#54463a;
  --accent:#bf5a2d;
  --gold:#b6842e;
  --panel:rgba(36,28,21,.02);
  --panel-2:rgba(36,28,21,.03);
  --line:rgba(36,28,21,.15);
  --soft-line:rgba(36,28,21,.08);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:linear-gradient(180deg,var(--bg-deep) 0%,var(--bg) 16%,var(--bg) 100%);color:var(--fg);font-family:ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
a{color:inherit}
code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

.site-header{height:var(--header);position:sticky;top:0;z-index:1000;display:flex;align-items:center;padding:0 clamp(20px,4vw,64px);gap:24px;border-bottom:1px solid var(--line);background:color-mix(in srgb,var(--bg) 89%,transparent);backdrop-filter:blur(16px)}
.brand{display:flex;align-items:center;text-decoration:none;margin-right:auto}
.brand-copy{font:650 14px/1.2 ui-sans-serif,system-ui,sans-serif;letter-spacing:.02em}
.brand-copy em{font-style:normal;color:var(--accent)}
.site-nav{display:flex;gap:24px}
.site-nav a{text-decoration:none;font-size:13px;color:var(--muted);padding:24px 0 20px;border-bottom:3px solid transparent}
.site-nav a:hover,.site-nav a.is-active{color:var(--fg);border-bottom-color:var(--accent)}
.theme-toggle{width:40px;height:40px;border:1px solid var(--line);background:transparent;color:var(--fg);cursor:pointer;border-radius:2px}

.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line)}
.hero-grid{position:absolute;inset:0;opacity:.24;background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);background-size:104px 104px;mask-image:linear-gradient(90deg,transparent,#000 4%,#000 96%,transparent)}
.hero-arc-inner{position:relative;z-index:1;width:min(var(--max),92vw);margin:0 auto;padding:56px 0 38px}
.eyebrow{margin:0 0 12px;color:var(--accent);text-transform:uppercase;letter-spacing:.2em;font:700 12px/1.2 ui-sans-serif,system-ui,sans-serif}
.arc-title{margin:0;max-width:15ch;font:700 68px/.95 Georgia,"Times New Roman",serif;letter-spacing:-.04em}
.arc-title em{font-style:italic;color:var(--accent);font-weight:600}
.arc-deck{max-width:1120px;margin:16px 0 0;color:var(--muted-2);font-size:16px;line-height:1.48}
.arc-columns{display:grid;grid-template-columns:minmax(0,calc(33.333% - 5px)) minmax(0,calc(33.333% - 5px)) minmax(0,calc(33.333% + 10px));gap:0;margin-top:26px;border-top:none}
.arc-col{display:grid;grid-template-columns:56px minmax(0,1fr);gap:18px;align-items:start;padding:18px 28px 0 0;min-height:100%}
.arc-col + .arc-col{padding-left:28px;border-left:1px solid var(--soft-line)}
.arc-step{font:700 50px/.92 ui-sans-serif,system-ui,sans-serif;letter-spacing:-.04em;color:#93a7bb;opacity:.95}
.arc-copy{min-width:0;display:flex;flex-direction:column;height:100%}
.arc-kicker{margin:2px 0 10px;color:var(--accent);text-transform:uppercase;letter-spacing:.16em;font:700 11px/1.2 ui-sans-serif,system-ui,sans-serif}
.arc-col-title{margin:0;max-width:17ch;font:700 23px/1.08 Georgia,"Times New Roman",serif;letter-spacing:-.015em;color:var(--fg);text-wrap:balance}
.arc-col-body{margin:10px 0 0;color:var(--muted-2);font-size:14px;line-height:1.45;max-width:34ch}
.arc-question{margin:12px 0 0;color:var(--muted-2);font-size:14px;line-height:1.42;max-width:34ch;margin-top:auto;padding-top:12px}
.arc-question strong{color:var(--accent)}
.controls-shell{position:sticky;top:var(--header);z-index:900;background:color-mix(in srgb,var(--bg) 95%,transparent);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.controls-inner,.results-row,.sticky-grid-head,.grid-shell,.footer-note,.site-footer{width:min(var(--max),92vw);margin:0 auto}
.controls-inner{display:grid;grid-template-columns:minmax(0,1fr) minmax(250px,300px);gap:18px;align-items:center;padding:16px 0 10px}
.filter-row{display:grid;grid-template-columns:repeat(7,minmax(0,1fr));gap:8px}
.filter-btn{min-height:38px;border:1px solid var(--line);background:transparent;color:var(--muted);padding:9px 10px;cursor:pointer;font-size:12px;letter-spacing:.04em;text-align:center}
.filter-btn:hover,.filter-btn.is-active{border-color:color-mix(in srgb,var(--accent) 70%,var(--line));color:var(--fg);background:color-mix(in srgb,var(--accent) 10%,transparent)}
.search-wrap input{width:100%;background:var(--panel);border:1px solid var(--line);color:var(--fg);padding:11px 12px;font:inherit;font-size:13px;outline:none}
.search-wrap input:focus{border-color:var(--accent)}
.results-row{padding:0 0 8px;color:var(--muted);font-size:13px}
.sticky-grid-head{padding:0 0 0}
.grid-shell{padding:0 0 88px}
.grid-header{display:grid;grid-template-columns:var(--phase-col) var(--study-col) var(--learn-col) var(--next-col);gap:18px;padding:10px 0 10px;border-top:1px solid var(--soft-line);border-bottom:1px solid var(--line)}
.gh{color:var(--accent);font-size:10px;letter-spacing:.18em;text-transform:uppercase;font-weight:700}
.grid-header .gh:nth-child(1){padding-left:26px}
.grid-header .gh:nth-child(4){padding-left:28px}
.phase-group{border-bottom:1px solid var(--line)}
.phase-layout{display:grid;grid-template-columns:var(--phase-col) 1fr;gap:18px}
.phase-cell{position:relative;padding:18px 0 16px 26px}
.phase-cell::before{content:"";position:absolute;left:10px;top:20px;bottom:10px;width:1px;background:color-mix(in srgb,var(--accent) 56%,transparent)}
.phase-cell::after{content:"";position:absolute;left:4px;top:26px;width:12px;height:12px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 4px color-mix(in srgb,var(--accent) 12%,transparent)}
.phase-line-arrow{position:absolute;left:6px;bottom:5px;width:0;height:0;border-left:5px solid transparent;border-right:5px solid transparent;border-top:9px solid var(--accent);filter:drop-shadow(0 0 2px color-mix(in srgb,var(--accent) 18%,transparent));}
.phase-title{margin:0;font:700 22px/.98 Georgia,"Times New Roman",serif;letter-spacing:-.022em;max-width:10ch}
.phase-summary{margin:10px 0 0;color:var(--muted-2);font-size:14px;line-height:1.48;max-width:25ch}
.phase-question{margin:10px 0 0;color:var(--muted);font-size:12px;line-height:1.55;max-width:26ch}
.phase-question strong{color:var(--fg)}
.phase-rows{display:grid;gap:0}
.study-row-grid{display:grid;grid-template-columns:var(--study-col) var(--learn-col) var(--next-col);gap:18px;padding:0;border-top:1px solid var(--soft-line)}
.study-row-grid:first-child{border-top:none}
.study-cell,.learn-cell,.next-cell{padding:16px 0;display:flex;flex-direction:column}
.study-cell{position:relative;padding-left:28px}
.study-title{margin:0;font:700 17px/1.14 Georgia,"Times New Roman",serif;letter-spacing:-.012em}
.study-meta{margin:7px 0 0;display:flex;flex-wrap:wrap;align-items:center;gap:7px 9px}
.study-meta .tagword{font-size:10px;letter-spacing:.15em;text-transform:uppercase;color:var(--muted)}
.study-meta .sep{display:inline-flex;align-items:center;justify-content:center;color:var(--muted);opacity:.45;line-height:1;transform:translateY(-1px)}
.study-narrative{margin:10px 0 0;color:var(--muted-2);font-size:14.5px;line-height:1.5;max-width:33ch}
.box-label{margin:0 0 8px;color:var(--muted);font-size:10px;letter-spacing:.18em;text-transform:uppercase}
.learn-box,.next-box{display:flex;flex-direction:column;justify-content:flex-start;flex:1;border:1px solid color-mix(in srgb,var(--line) 80%,transparent);background:linear-gradient(180deg,var(--panel),var(--panel-2));padding:12px 13px 12px;box-shadow:inset 0 1px 0 rgba(255,255,255,.02)}
.learn-text,.next-text{margin:0;font-size:14.5px;line-height:1.48;color:var(--muted-2);font-weight:400}
.learn-text strong,.next-text strong{color:var(--fg)}
.learn-text strong{font-weight:400}
.next-wrap{display:grid;grid-template-columns:18px 1fr;gap:10px;align-items:stretch;flex:1}
.arrow{color:var(--accent);font-size:24px;line-height:1;padding-top:14px;text-align:center}
.study-marker{position:absolute;left:0;top:18px;width:12px;height:12px;border:4px solid var(--accent);background:var(--bg);box-shadow:0 2px 10px rgba(0,0,0,.2)}
.badges{margin:10px 0 0;display:flex;flex-wrap:wrap;gap:8px}
.badge{display:inline-flex;align-items:center;min-height:22px;padding:4px 8px;border:1px solid var(--line);font-size:10px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}
.badge.is-kill{border-color:color-mix(in srgb,var(--accent) 48%,var(--line));color:var(--accent)}
.badge.is-current{border-color:color-mix(in srgb,var(--gold) 45%,var(--line));color:var(--gold)}
.empty-state{padding:36px 0;color:var(--muted);font-size:16px}
.footer-note{padding:0 0 32px;color:var(--muted);font-size:14px}
.site-footer{padding:18px 0 34px;display:flex;justify-content:space-between;gap:24px;border-top:1px solid var(--line);color:var(--muted);font-size:13px}
.site-footer a{text-decoration:none}

@media (max-width: 1260px){
  :root{--phase-col:248px;--study-col:330px;--learn-col:248px;--next-col:248px}
  .arc-title{font-size:64px}
}
@media (max-width: 1140px){
  .arc-title{font-size:58px}
  .arc-deck{font-size:16px}
  .arc-columns{grid-template-columns:1fr;gap:0;margin-top:22px}
  .arc-col{grid-template-columns:44px minmax(0,1fr);gap:14px;padding:14px 0 12px 0}
  .arc-col + .arc-col{padding-left:0;border-left:none;border-top:1px solid var(--soft-line)}
  .arc-step{font-size:40px}
  .arc-col-title,.arc-col-body,.arc-question{max-width:none}
  .filter-row{grid-template-columns:repeat(4,minmax(0,1fr))}
  .grid-header{display:none}
  .phase-group{position:relative}
  .phase-group::before{content:"";position:absolute;left:10px;top:26px;bottom:-1px;width:1px;background:color-mix(in srgb,var(--accent) 56%,transparent);z-index:0}
  .phase-group::after{content:"";position:absolute;left:6px;bottom:-1px;width:0;height:0;border-left:5px solid transparent;border-right:5px solid transparent;border-top:9px solid var(--accent);z-index:1}
  .phase-layout{grid-template-columns:1fr;position:relative;z-index:1}
  .phase-cell{padding-bottom:4px;border-bottom:1px solid var(--soft-line)}
  .phase-cell::before{display:none}
  .phase-line-arrow{display:none}
  .phase-title,.phase-summary,.phase-question{max-width:none}
  .phase-summary{margin:5px 0 0}
  .phase-question{margin:5px 0 0}
  .study-row-grid{grid-template-columns:1fr;border-top:none}
  .study-cell{padding-left:0}
  .study-marker{display:none}
  .study-cell{padding:3px 0 1px 96px}
  .learn-cell{padding:0 0 0 96px}
  .next-cell{padding:0 0 12px 96px}
  .study-cell::before{content:"";position:absolute;left:70px;top:4px;width:7px;height:7px;border:3px solid var(--accent);background:transparent;box-shadow:0 4px 10px rgba(0,0,0,.24)}
  .study-title{margin-top:-1px}
  .study-meta{margin:3px 0 0}
  .study-narrative{margin:4px 0 0;max-width:none}
  .learn-box,.next-box{padding:10px 12px 10px}
  .box-label{margin:0 0 4px;color:var(--accent)}
  .next-box{margin-bottom:8px}
  .next-wrap{grid-template-columns:1fr}
  .arrow{display:none}
}
@media (max-width: 900px){
  .site-nav{display:none}
  .controls-inner{grid-template-columns:1fr}
}
@media (max-width: 640px){
  .hero-arc-inner{padding:48px 0 28px}
  .arc-title{font-size:44px}
  .arc-deck{font-size:15px}
  .arc-step{font-size:34px}
  .arc-col-title{font-size:21px;max-width:none}
  .arc-col-body,.arc-question{font-size:13px}
  .filter-row{grid-template-columns:repeat(2,minmax(0,1fr))}
  .site-footer{flex-direction:column}
}