:root {
  --paper:     #E4E7E0;
  --surface:   #FFFFFF;
  --ink:       #0E1013;
  --ink-soft:  #3E4348;
  --ink-faint: #70767B;
  --line:      #BFC5BB;
  --accent:    #B4661A;

  --serif: "Iowan Old Style", "Palatino Linotype", Palatino, "Book Antiqua", Georgia, serif;
  --sans:  system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono:  "Cascadia Code", "SFMono-Regular", "SF Mono", Consolas, Menlo, monospace;
}
@media (prefers-color-scheme: dark) {
  :root {
    --paper:     #0D0F11;
    --surface:   #1C2024;
    --ink:       #F4F6F2;
    --ink-soft:  #B4BAB5;
    --ink-faint: #828992;
    --line:      #383E44;
    --accent:    #E0913F;
  }
}
:root[data-theme="light"] {
  --paper:     #E4E7E0;
  --surface:   #FFFFFF;
  --ink:       #0E1013;
  --ink-soft:  #3E4348;
  --ink-faint: #70767B;
  --line:      #BFC5BB;
  --accent:    #B4661A;
}
:root[data-theme="dark"] {
  --paper:     #0D0F11;
  --surface:   #1C2024;
  --ink:       #F4F6F2;
  --ink-soft:  #B4BAB5;
  --ink-faint: #828992;
  --line:      #383E44;
  --accent:    #E0913F;
}

/* ===== RESET & BASE ===== */
*{box-sizing:border-box}
body{margin:0;background:var(--paper);color:var(--ink);font:17px/1.65 var(--sans);-webkit-font-smoothing:antialiased;}

/* ===== LAYOUT ===== */
.wrap{max-width:760px;margin:0 auto;padding:40px 24px 80px;}

/* ===== LINKS ===== */
a{color:var(--accent);text-decoration:none;}
a:hover{text-decoration:underline;}
a:focus-visible,nav a:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:2px;}

/* ===== SKIP LINK ===== */
.skip{position:absolute;left:-999px;top:8px;z-index:200;background:var(--accent);color:#fff;padding:10px 16px;border-radius:4px;font-weight:600;}
.skip:focus{left:8px;}

/* ===== TOP BAR ===== */
.top{display:flex;justify-content:space-between;align-items:center;gap:16px;border-bottom:1px solid var(--line);padding-bottom:16px;margin-bottom:36px;font-size:14px;flex-wrap:wrap;}
.brand{font-weight:600;color:var(--ink);}
.brand small{font-size:.62em;font-weight:600;letter-spacing:.02em;}
.top nav{display:flex;gap:18px;}
.top nav a{color:var(--ink-soft);}
.top nav a[aria-current="page"]{color:var(--accent);}

/* ===== TYPOGRAPHY ===== */
h1{font:600 clamp(26px,5vw,34px)/1.15 var(--serif);margin:0 0 8px;letter-spacing:-.01em;}
.eff{color:var(--ink-soft);font-size:13px;margin:0 0 28px;font-family:var(--mono);}
h2{font:600 19px/1.3 var(--sans);margin:34px 0 10px;}
p{margin:0 0 14px;}
ul{margin:0 0 14px;padding-left:22px;}
li{margin:6px 0;}
.soft{color:var(--ink-soft);}

/* ===== COMPONENTS ===== */
.note{background:color-mix(in srgb,var(--accent) 9%,transparent);border:1px solid var(--line);border-radius:6px;padding:14px 16px;font-size:14px;color:var(--ink-soft);margin:22px 0;}
.ph{background:color-mix(in srgb,var(--accent) 16%,transparent);border-radius:3px;padding:0 4px;font-family:var(--mono);font-size:.92em;}

/* ===== FOOTER ===== */
footer{margin-top:48px;border-top:1px solid var(--line);padding-top:16px;font-size:13px;color:var(--ink-soft);}