@import url('https://fonts.googleapis.com/css2?family=Fraunces:ital,opsz,wght@0,9..144,400;0,9..144,600;0,9..144,800;1,9..144,400&family=JetBrains+Mono:wght@400;500&family=Outfit:wght@400;500;600;700;800&display=swap');

:root{
  --ds-bg:#f0ebe1;
  --ds-surface:#faf7f0;
  --ds-ink:#1c1b18;
  --ds-mid:#47423b;
  --ds-soft:#7a756c;
  --ds-ghost:#b5b0a7;
  --ds-rule:rgba(28,27,24,.10);
  --ds-rule-strong:rgba(28,27,24,.18);
  --ds-teal:#1a5c6b;
  --ds-teal-soft:rgba(26,92,107,.08);
  --ds-terra:#c0622a;
  --ds-terra-soft:rgba(192,98,42,.08);
  --ds-shadow:0 18px 46px rgba(28,27,24,.06);
  --ds-max:1120px;
}

html{scroll-behavior:smooth}

body.ds-learning-page{
  margin:0!important;
  min-height:100vh;
  color:var(--ds-ink)!important;
  background:
    radial-gradient(circle at 8% 0%,rgba(192,98,42,.07),transparent 24%),
    radial-gradient(circle at 92% 3%,rgba(26,92,107,.08),transparent 25%),
    var(--ds-bg)!important;
  font-family:'Fraunces',Georgia,serif!important;
  -webkit-font-smoothing:antialiased;
}

body.ds-learning-page::after{
  content:"";
  position:fixed;
  inset:0;
  z-index:9999;
  pointer-events:none;
  opacity:.25;
  background:url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.84' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.04'/%3E%3C/svg%3E");
  background-size:210px;
  mix-blend-mode:multiply;
}

.ds-sitebar{
  position:sticky;
  top:0;
  z-index:5000;
  background:rgba(240,235,225,.92);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--ds-rule);
  color:var(--ds-ink);
}

.ds-sitebar-inner{
  width:min(calc(100% - 32px),var(--ds-max));
  min-height:66px;
  margin:0 auto;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:18px;
  position:relative;
}

.ds-brand{
  display:flex;
  flex-direction:column;
  color:var(--ds-ink)!important;
  text-decoration:none!important;
}

.ds-brand strong{
  font-family:'Outfit',sans-serif;
  font-size:.9rem;
  line-height:1.25;
  font-weight:800;
  letter-spacing:.08em;
  text-transform:uppercase;
}

.ds-brand span{
  font-family:'JetBrains Mono',monospace;
  font-size:.67rem;
  line-height:1.35;
  color:var(--ds-soft);
}

.ds-site-nav{
  display:flex;
  align-items:center;
  gap:3px;
}

.ds-site-nav a{
  padding:8px 11px;
  border-radius:999px;
  color:var(--ds-soft)!important;
  font-family:'Outfit',sans-serif!important;
  font-size:.8rem!important;
  line-height:1.4!important;
  font-weight:700!important;
  text-decoration:none!important;
  text-transform:none!important;
  margin:0!important;
}

.ds-site-nav a:hover,
.ds-site-nav a.ds-active{
  color:var(--ds-ink)!important;
  background:rgba(28,27,24,.06)!important;
}

.ds-menu-toggle{
  display:none;
  width:42px;
  height:42px;
  align-items:center;
  justify-content:center;
  border:1px solid var(--ds-rule);
  border-radius:11px;
  background:rgba(255,255,255,.45);
  color:var(--ds-ink);
  font-size:1.1rem;
  cursor:pointer;
}

.ds-pathbar,
.ds-contextbar{
  width:min(calc(100% - 32px),var(--ds-max));
  margin:20px auto 0;
  border:1px solid var(--ds-rule);
  border-radius:20px;
  background:rgba(250,247,240,.78);
  box-shadow:var(--ds-shadow);
  overflow:hidden;
}

.ds-path-head,
.ds-context-inner{
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap:18px;
  padding:16px 18px 13px;
}

.ds-path-kicker,
.ds-context-kicker{
  font-family:'JetBrains Mono',monospace;
  font-size:.67rem;
  color:var(--ds-terra);
  margin-bottom:3px;
}

.ds-path-title,
.ds-context-title{
  font-family:'Fraunces',Georgia,serif;
  font-size:1.15rem;
  line-height:1.15;
  font-weight:600;
  color:var(--ds-ink);
}

.ds-path-copy,
.ds-context-copy{
  max-width:50ch;
  color:var(--ds-soft);
  font-size:.86rem;
  line-height:1.5;
  text-align:right;
}

.ds-steps{
  display:flex;
  gap:7px;
  overflow-x:auto;
  padding:0 12px 12px;
  scrollbar-width:thin;
  scrollbar-color:var(--ds-ghost) transparent;
}

.ds-step{
  flex:0 0 auto;
  display:flex;
  align-items:center;
  gap:8px;
  min-height:42px;
  padding:7px 11px;
  border:1px solid var(--ds-rule);
  border-radius:12px;
  background:rgba(255,255,255,.42);
  color:var(--ds-mid)!important;
  text-decoration:none!important;
  font-family:'Outfit',sans-serif!important;
  font-size:.77rem!important;
  font-weight:700!important;
  line-height:1.25!important;
}

.ds-step-num{
  display:grid;
  place-items:center;
  width:22px;
  height:22px;
  border-radius:50%;
  background:var(--ds-teal-soft);
  color:var(--ds-teal);
  font-family:'JetBrains Mono',monospace;
  font-size:.62rem;
}

.ds-step:hover{
  border-color:var(--ds-rule-strong);
  background:rgba(255,255,255,.72);
}

.ds-step.ds-current{
  color:white!important;
  background:var(--ds-ink);
  border-color:var(--ds-ink);
}

.ds-step.ds-current .ds-step-num{
  background:rgba(255,255,255,.13);
  color:white;
}

.ds-step-footer{
  width:min(calc(100% - 32px),var(--ds-max));
  margin:28px auto 54px;
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:12px;
}

.ds-step-footer.ds-end{grid-template-columns:1fr}

.ds-next-card{
  min-height:110px;
  padding:18px;
  border:1px solid var(--ds-rule);
  border-radius:18px;
  background:var(--ds-surface);
  box-shadow:var(--ds-shadow);
  text-decoration:none!important;
  color:var(--ds-ink)!important;
}

.ds-next-card:hover{
  transform:translateY(-1px);
  border-color:var(--ds-rule-strong);
}

.ds-next-card small{
  display:block;
  margin-bottom:5px;
  font-family:'JetBrains Mono',monospace;
  font-size:.64rem;
  color:var(--ds-terra);
  text-transform:uppercase;
  letter-spacing:.05em;
}

.ds-next-card strong{
  display:block;
  font-family:'Fraunces',Georgia,serif;
  font-size:1.18rem;
  line-height:1.2;
  margin-bottom:5px;
}

.ds-next-card span{
  display:block;
  color:var(--ds-soft);
  font-size:.86rem;
  line-height:1.45;
}

.ds-next-card.ds-next{text-align:right}

.ds-path-end{
  padding:22px;
  border:1px solid var(--ds-rule);
  border-radius:18px;
  background:linear-gradient(135deg,var(--ds-teal-soft),var(--ds-terra-soft));
  color:var(--ds-mid);
  line-height:1.55;
}
.ds-path-end strong{
  display:block;
  color:var(--ds-ink);
  font-family:'Fraunces',Georgia,serif;
  font-size:1.15rem;
  margin-bottom:5px;
}

/* Hide old site chrome on legacy pages without touching the interactive content. */
body.ds-learning-page > header:not(.ds-sitebar),
body.ds-learning-page > footer:not(.ds-step-footer){
  display:none!important;
}

/* Shared content rhythm */
body.ds-binary-page > .wrap,
body.ds-binary-page > .container,
body.ds-binary-page > main,
body.ds-binary-page > .app{
  margin-top:20px!important;
}

body.ds-binary-page h1,
body.ds-binary-page h2,
body.ds-binary-page h3,
body.ds-utility-page h1,
body.ds-utility-page h2,
body.ds-utility-page h3{
  font-family:'Fraunces',Georgia,serif!important;
  color:var(--ds-ink)!important;
  letter-spacing:-.02em!important;
}

body.ds-binary-page p,
body.ds-binary-page li,
body.ds-utility-page p,
body.ds-utility-page li{
  color:var(--ds-mid);
}

/* Binary 1 + Binary 4 legacy light pages */
body.ds-binary-page .container{
  max-width:1100px!important;
  width:min(calc(100% - 32px),1100px)!important;
  margin:20px auto!important;
  padding:24px!important;
  background:rgba(250,247,240,.82)!important;
  border:1px solid var(--ds-rule)!important;
  border-radius:22px!important;
  box-shadow:var(--ds-shadow)!important;
  text-align:left;
}

body.ds-binary-page .main-title{
  padding:0 0 18px!important;
  background:transparent!important;
  border-bottom:1px solid var(--ds-rule);
}

body.ds-binary-page .column,
body.ds-binary-page .info-section,
body.ds-binary-page .challenge-container,
body.ds-binary-page .binary-tree-tutorial,
body.ds-binary-page .practice-section{
  background:rgba(255,255,255,.47)!important;
  border:1px solid var(--ds-rule)!important;
  border-radius:16px!important;
  box-shadow:none!important;
}

body.ds-binary-page .column{padding:20px!important}
body.ds-binary-page .challenge-container,
body.ds-binary-page .binary-tree-tutorial,
body.ds-binary-page .practice-section{padding:16px!important}

/* Dark interactive pages become warm editorial tools */
body.ds-binary-page{
  --bg0:var(--ds-bg);
  --bg1:var(--ds-bg);
  --bg:var(--ds-bg);
  --card:rgba(250,247,240,.82);
  --card2:rgba(255,255,255,.46);
  --stroke:var(--ds-rule);
  --stroke2:var(--ds-rule-strong);
  --text:var(--ds-ink);
  --muted:var(--ds-mid);
  --muted2:var(--ds-soft);
  --shadow:var(--ds-shadow);
  --focus:0 0 0 4px rgba(26,92,107,.10);
  --border:var(--ds-rule);
  --panel:rgba(255,255,255,.48);
  --panelBorder:var(--ds-rule);
  --accent:var(--ds-teal);
  --accent2:var(--ds-teal);
}

body.ds-binary-page .hero,
body.ds-binary-page .app,
body.ds-binary-page .sectionCard,
body.ds-binary-page .card:not(.ds-next-card),
body.ds-binary-page .panel,
body.ds-binary-page .ascii-section,
body.ds-binary-page .stat{
  background:rgba(250,247,240,.82)!important;
  border-color:var(--ds-rule)!important;
  box-shadow:var(--ds-shadow)!important;
  color:var(--ds-ink)!important;
}

body.ds-binary-page .top,
body.ds-binary-page .controls{
  background:transparent!important;
  border-color:var(--ds-rule)!important;
}

body.ds-binary-page .explain,
body.ds-binary-page .explanation,
body.ds-binary-page .chip,
body.ds-binary-page .row,
body.ds-binary-page .binaryBox:not(.ds-blackbox .binaryBox),
body.ds-binary-page .ascii-item,
body.ds-binary-page .stat{
  background:rgba(255,255,255,.44)!important;
  border-color:var(--ds-rule)!important;
  color:var(--ds-mid)!important;
}

body.ds-binary-page .small,
body.ds-binary-page .subtitle,
body.ds-binary-page .hint,
body.ds-binary-page label{
  color:var(--ds-soft)!important;
}

body.ds-binary-page button,
body.ds-binary-page .challenge-button,
body.ds-binary-page input[type="button"],
body.ds-binary-page input[type="submit"]{
  border:1px solid var(--ds-ink)!important;
  background:var(--ds-ink)!important;
  color:white!important;
  border-radius:12px!important;
  font-family:'Outfit',sans-serif!important;
  font-weight:700!important;
  box-shadow:none!important;
}

body.ds-binary-page button:hover,
body.ds-binary-page .challenge-button:hover{
  background:#34312c!important;
  transform:translateY(-1px);
}

body.ds-binary-page input:not([type="range"]):not([type="checkbox"]):not([type="file"]),
body.ds-binary-page textarea,
body.ds-binary-page select{
  background:rgba(255,255,255,.62)!important;
  color:var(--ds-ink)!important;
  border:1px solid var(--ds-rule-strong)!important;
  border-radius:12px!important;
  font-family:'Outfit',sans-serif;
}

body.ds-binary-page input:focus,
body.ds-binary-page textarea:focus,
body.ds-binary-page select:focus{
  outline:none!important;
  border-color:rgba(26,92,107,.42)!important;
  box-shadow:0 0 0 4px rgba(26,92,107,.08)!important;
}

body.ds-binary-page .mono,
body.ds-binary-page pre,
body.ds-binary-page .binary-value{
  font-family:'JetBrains Mono',monospace!important;
}

/* Keep meaningful visuals meaningful */
body.ds-binary-page .preview,
body.ds-binary-page canvas,
body.ds-binary-page .color-box,
body.ds-binary-page .bulb,
body.ds-binary-page .bulbBig,
body.ds-binary-page .pixel,
body.ds-binary-page [style*="background-color"]{
  /* intentionally not recolored */
}

/* Audio page layout */
body.ds-binary-page .wrap{
  width:min(calc(100% - 32px),1200px)!important;
}
body.ds-binary-page .wrap > .card.full{grid-column:1/-1}

/* Black Box remains a dark capstone inside the shared site shell. */
body.ds-blackbox-page{
  --bg0:#05060a;
  --bg1:#070a12;
  --panel:rgba(255,255,255,.055);
  --border:rgba(255,255,255,.12);
  --text:rgba(245,248,255,.9);
  --blue:#7db6ff;
  --mint:#86f3c6;
  --warm:#ffd07a;
  --shadow:0 22px 90px rgba(0,0,0,.5);
  color:var(--ds-ink)!important;
}
body.ds-blackbox-page > .wrap{margin-top:20px!important}
body.ds-blackbox-page > .wrap .card{
  background:linear-gradient(180deg,#12151d,#090b10)!important;
  border-color:rgba(255,255,255,.12)!important;
  box-shadow:0 22px 70px rgba(0,0,0,.25)!important;
}
body.ds-blackbox-page > .wrap .content,
body.ds-blackbox-page > .wrap .content p,
body.ds-blackbox-page > .wrap .content span{
  color:rgba(245,248,255,.85);
}
body.ds-blackbox-page > .wrap .binaryBox{
  background:rgba(0,0,0,.30)!important;
  border-color:rgba(255,255,255,.10)!important;
}
body.ds-blackbox-page > .wrap pre{color:rgba(245,248,255,.9)!important}
body.ds-blackbox-page > .wrap textarea{
  background:rgba(0,0,0,.28)!important;
  color:rgba(245,248,255,.92)!important;
  border-color:rgba(255,255,255,.12)!important;
}
body.ds-blackbox-page > .wrap button{
  background:rgba(134,243,198,.08)!important;
  border-color:rgba(134,243,198,.28)!important;
  color:rgba(245,248,255,.9)!important;
}

/* Utility pages */
body.ds-utility-page{
  display:block!important;
  padding:0!important;
  align-items:initial!important;
  justify-content:initial!important;
}

body.ds-utility-page > .container{
  width:min(calc(100% - 32px),1000px)!important;
  max-width:1000px!important;
  margin:22px auto 48px!important;
  padding:28px!important;
  border:1px solid var(--ds-rule)!important;
  border-radius:22px!important;
  background:rgba(250,247,240,.84)!important;
  box-shadow:var(--ds-shadow)!important;
  color:var(--ds-ink)!important;
  text-align:left!important;
}

body.ds-utility-page .section,
body.ds-utility-page .bio-section,
body.ds-utility-page .highlight,
body.ds-utility-page .practice-section{
  background:rgba(255,255,255,.46)!important;
  border:1px solid var(--ds-rule)!important;
  border-radius:16px!important;
  color:var(--ds-mid)!important;
  box-shadow:none!important;
}

body.ds-utility-page .section,
body.ds-utility-page .bio-section,
body.ds-utility-page .practice-section{padding:20px!important;margin-bottom:18px!important}

body.ds-utility-page .highlights{
  gap:12px!important;
}

body.ds-utility-page .highlight{
  padding:18px!important;
  text-align:left;
}

body.ds-utility-page .name,
body.ds-utility-page .tagline,
body.ds-utility-page .subtitle,
body.ds-utility-page .bio-section h3,
body.ds-utility-page .highlight h4,
body.ds-utility-page .highlight p{
  color:var(--ds-ink)!important;
  text-shadow:none!important;
}

body.ds-utility-page .subtitle,
body.ds-utility-page .highlight p,
body.ds-utility-page .bio-section p{color:var(--ds-mid)!important}

body.ds-utility-page .avatar,
body.ds-utility-page .iste-badge{
  background:var(--ds-teal)!important;
  color:white!important;
  box-shadow:none!important;
}

body.ds-utility-page button,
body.ds-utility-page .connect-button{
  background:var(--ds-ink)!important;
  color:white!important;
  border:1px solid var(--ds-ink)!important;
  border-radius:12px!important;
  box-shadow:none!important;
  font-family:'Outfit',sans-serif!important;
  font-weight:700!important;
}

body.ds-utility-page button:hover,
body.ds-utility-page .connect-button:hover{
  background:#34312c!important;
  transform:translateY(-1px);
}

body.ds-utility-page input,
body.ds-utility-page textarea,
body.ds-utility-page select{
  border:1px solid var(--ds-rule-strong)!important;
  border-radius:11px!important;
  background:rgba(255,255,255,.62)!important;
  color:var(--ds-ink)!important;
}


body.ds-utility-page > h1,
body.ds-utility-page > .section{
  width:min(calc(100% - 32px),1000px)!important;
  margin-left:auto!important;
  margin-right:auto!important;
}
body.ds-utility-page > h1{
  margin-top:24px!important;
  margin-bottom:18px!important;
  font-size:clamp(1.9rem,3.5vw,2.8rem)!important;
  line-height:1.05!important;
}
body.ds-utility-page > .section{
  margin-bottom:16px!important;
}
body.ds-utility-page .mini-quiz,
body.ds-utility-page .tip{
  border-radius:14px!important;
  border:1px solid var(--ds-rule)!important;
  box-shadow:none!important;
}
body.ds-utility-page .tip{
  background:var(--ds-teal-soft)!important;
  border-left:4px solid var(--ds-teal)!important;
}

body.ds-utility-page .floating-elements{display:none!important}

@media(max-width:760px){
  .ds-menu-toggle{display:flex}
  .ds-site-nav{
    display:none;
    position:absolute;
    top:calc(100% + 6px);
    left:0;
    right:0;
    padding:10px;
    flex-direction:column;
    align-items:stretch;
    border:1px solid var(--ds-rule);
    border-radius:14px;
    background:rgba(240,235,225,.98);
    box-shadow:var(--ds-shadow);
  }
  .ds-site-nav.ds-open{display:flex}
  .ds-site-nav a{padding:11px 13px}
  .ds-path-head,.ds-context-inner{flex-direction:column}
  .ds-path-copy,.ds-context-copy{text-align:left}
  .ds-step-footer{grid-template-columns:1fr}
  .ds-next-card.ds-next{text-align:left}
  body.ds-binary-page .container,
  body.ds-utility-page > .container{padding:20px!important}
}

@media(max-width:520px){
  .ds-brand span{font-size:.6rem}
  .ds-sitebar-inner,.ds-pathbar,.ds-contextbar,.ds-step-footer{width:min(calc(100% - 20px),var(--ds-max))}
}