:root {
  /* spacing: 4-based scale, used everywhere */
  --s-1: 4px;   --s-2: 8px;   --s-3: 12px;  --s-4: 16px;
  --s-5: 24px;  --s-6: 32px;  --s-7: 48px;  --s-8: 72px;  --s-9: 112px;

  /* radii */
  --r-1: 4px;   --r-2: 8px;   --r-3: 14px;  --r-pill: 999px;

  /* type — heading font swappable via [data-heading="mono|sans"] */
  --f-sans: 'Space Grotesk', ui-sans-serif, system-ui, sans-serif;
  --f-mono: 'JetBrains Mono', ui-monospace, 'Courier New', monospace;
  --f-sans-2: "Source Sans Pro", Helvetica, sans-serif;
  --f-heading: var(--f-sans);
  --f-body:    var(--f-sans);

  --c-bg:       #935d8c;
  --c-bg-2:     rgba(255,255,255,0.06);   /* subtle raised surface */
  --c-bg-3:     rgba(255,255,255,0.10);   /* card */
  --c-bg-4:     rgba(0,0,0,0.50);   /* section */
  --c-bg-5:     rgba(0,0,0,0.30);   /* selected */
  --c-line:     rgba(255,255,255,0.16);
  --c-line-2:   rgba(255,255,255,0.32);
  --c-fg:       #ffffff;
  --c-fg-soft:  rgba(255,255,255,0.78);
  --c-fg-mute:  rgba(255,255,255,0.70);
  --c-accent:   #ff00c6;       /* your accent / accent5 */
  --c-accent-2: #00fff3;       /* your accent1 */
  --c-warn:     #ffd28a;
  --c-white:    #ffffff;
  --c-black:    #000000;
  --c-yellow:   #fff000;
  --c-good:     #c8efb4;
  --c-bad:      #ff00f052;


  /* gradient bg layer — 45deg from bg1 to bg2 over bg, like your _page.scss */
  --bg-grad: linear-gradient(45deg, #e37682 15%, #5f4d93 85%), #935d8c;

  --bg-grid:  linear-gradient(rgba(255,255,255,0.08) 1px, transparent 1px) 0 0 / 32px 32px,
              linear-gradient(90deg, rgba(255,255,255,0.08) 1px, transparent 1px) 0 0 / 32px 32px,
              linear-gradient(45deg, #e37682 15%, #5f4d93 85%);

  --bg-noise: var(--c-bg);

  --bg-active: var(--bg-grad);

  --shadow-1: 0 1px 0 rgba(255,255,255,0.06) inset, 0 4px 24px rgba(0,0,0,0.30);
  --shadow-2: 0 1px 0 rgba(255,255,255,0.08) inset, 0 12px 40px rgba(0,0,0,0.40);

  /* --- */

  /* core brand */
  --c-pink:    #ff00c6;  /* primary accent, buttons, borders */
  --c-cyan:    #00fff3;  /* secondary accent, focus, tags */
  --c-yellow:  #fff000;  /* hover text, highlights */
  --c-mint:    #81d8a2;  /* hover bg, success state */
  --c-purple:  #935d8c;  /* body background */
 
  /* interactive */
  --c-blue:    #8cc9f0;  /* focus rings, primary button base */
  --c-gray:    #636363;  /* light panel text (#main, #nav) */
  --c-gray-bg: #f7f7f7;  /* light panel background (#nav) */
  --c-white-bg: #ffffff; /* #main background */
 
  /* pastels — icon styles, gradient accents */
  --c-pastel-1: #efa8b0;  /* style1 icon, gradient start */
  --c-pastel-2: #c79cc8;  /* style2 icon */
  --c-pastel-3: #a89cc8;  /* style3 icon, gradient mid */
  --c-pastel-4: #9bb2e1;  /* style4 icon */
  --c-pastel-5: #8cc9f0;  /* style5 icon, gradient end (same as --c-blue) */
 
  /* transparency layers — used throughout for surfaces and borders */
  --c-white-6:  rgba(255, 255, 255, 0.06);
  --c-white-8:  rgba(255, 255, 255, 0.075);
  --c-white-20: rgba(255, 255, 255, 0.2);
  --c-white-35: rgba(255, 255, 255, 0.35);
  --c-white-50: rgba(255, 255, 255, 0.5);
  --c-white-65: rgba(255, 255, 255, 0.65);
  --c-gray-25:  rgba(222, 222, 222, 0.25);
  --c-gray-50:  rgba(222, 222, 222, 0.50);
  --c-pink-60:  rgba(255, 0, 198, 0.6);   /* scoreboard highlight */
  --c-mint-25:  rgba(129, 216, 162, 0.25); /* table row alt */
  --c-mint-50:  rgba(129, 216, 162, 0.5);  /* table row alt 2 */
  --c-yellow-60: rgba(255, 240, 0, 0.6);   /* scoreboard row highlight */
 
  /* state */
  --c-solved:  #a2f08c;  /* solved challenge bg */
  --c-invalid: #ff00c6;  /* invalid input border (same as pink) */
 
  /* header.major h2::after gradient */
  --grad-pastel: linear-gradient(90deg, #efa8b0, #a89cc8, #8cc9f0);
  --grad-challs: linear-gradient(90deg, #efa8b0, #a89cc8, #8cc9f0, #ffffff);

    /* light pairs */
  --pl1-a:  #c6fa1b;  --pl1-b:  #0f3dfe;
  --pl2-a:  #47e97c;  --pl2-b:  #0f3cff;
  --pl3-a:  #f40203;  --pl3-b:  #afe022;
  --pl4-a:  #c6fa1d;  --pl4-b:  #fa1de2;
  --pl5-a:  #f61ee4;  --pl5-b:  #bede24;
  --pl6-a:  #f30102;  --pl6-b:  #4ce282;
  --pl7-a:  #f51de3;  --pl7-b:  #c0de24;
  --pl8-a:  #c6fa1d;  --pl8-b:  #d50314;
  --pl9-a:  #1d45fb;  --pl9-b:  #fe73ff;
  --pl10-a: #c6fa1d;  --pl10-b: #fe73ff;
  --pl11-a: #1d45fb;  --pl11-b: #bede24;
  --pl12-a: #1c44fa;  --pl12-b: #46e379;
  --pl13-a: #1d45fb;  --pl13-b: #f91012;
  --pl14-a: #49eb7e;  --pl14-b: #d50314;
  --pl15-a: #f673fa;  --pl15-b: #2448fd;
  --pl16-a: #f572f9;  --pl16-b: #42d85f;
  --pl17-a: #ec7dee;  --pl17-b: #e50307;
  --pl18-a: #ff00ff;  --pl18-b: #00ff00;
  --pl19-a: #00ffff;  --pl19-b: #ff0000;
  --pl20-a: #ffff00;  --pl20-b: #0000ff;
  --pl21-a: #ff8000;  --pl21-b: #0080ff;
  --pl22-a: #80ff00;  --pl22-b: #8000ff;
  --pl23-a: #ff0080;  --pl23-b: #00ff80;
  --pl24-a: #00ff80;  --pl24-b: #ff0080;
  --pl25-a: #8000ff;  --pl25-b: #80ff00;
  --pl26-a: #0080ff;  --pl26-b: #ff8000;
  --pl27-a: #ffbf00;  --pl27-b: #4000ff;
  --pl28-a: #40ff00;  --pl28-b: #bf00ff;
  --pl29-a: #00ffbf;  --pl29-b: #ff0040;
  --pl30-a: #ff0040;  --pl30-b: #00ffbf;
  --pl31-a: #bf00ff;  --pl31-b: #40ff00;
  --pl32-a: #4000ff;  --pl32-b: #ffbf00;
  --pl33-a: #ff4000;  --pl33-b: #00bfff;
  --pl34-a: #00bfff;  --pl34-b: #ff4000;
  --pl35-a: #bfff00;  --pl35-b: #4000ff;
  --pl36-a: #4000ff;  --pl36-b: #bfff00;
  --pl37-a: #ff00bf;  --pl37-b: #00ff40;
  --pl38-a: #00ff40;  --pl38-b: #ff00bf;
  --pl39-a: #7fff00;  --pl39-b: #8000ff;
  --pl40-a: #8000ff;  --pl40-b: #7fff00;
  --pl41-a: #007fff;  --pl41-b: #ff8000;
  --pl42-a: #ff8000;  --pl42-b: #007fff;
 
  /* dark pairs */
  --pd1-a:  #040404;  --pd1-b:  #0d3dfd;
  --pd2-a:  #050505;  --pd2-b:  #e40202;
  --pd3-a:  #060606;  --pd3-b:  #da00ca;
  --pd4-a:  #060606;  --pd4-b:  #afe120;
  --pd5-a:  #030303;  --pd5-b:  #00ffff;
  --pd6-a:  #070707;  --pd6-b:  #ffff00;
  --pd7-a:  #020202;  --pd7-b:  #ff8000;
  --pd8-a:  #080808;  --pd8-b:  #80ff00;
  --pd9-a:  #010101;  --pd9-b:  #ff0080;
  --pd10-a: #090909;  --pd10-b: #00ff80;
  --pd11-a: #040404;  --pd11-b: #8000ff;
  --pd12-a: #050505;  --pd12-b: #0080ff;
  --pd13-a: #060606;  --pd13-b: #ffbf00;
  --pd14-a: #070707;  --pd14-b: #40ff00;
  --pd15-a: #080808;  --pd15-b: #00ffbf;
  --pd16-a: #010101;  --pd16-b: #ff0040;
  --pd17-a: #020202;  --pd17-b: #bf00ff;
  --pd18-a: #030303;  --pd18-b: #4000ff;
  --pd19-a: #090909;  --pd19-b: #ff4000;
  --pd20-a: #040404;  --pd20-b: #00bfff;
  --pd21-a: #050505;  --pd21-b: #bfff00;
  --pd22-a: #060606;  --pd22-b: #4000ff;
  --pd23-a: #070707;  --pd23-b: #ff00bf;
  --pd24-a: #080808;  --pd24-b: #00ff40;
  --pd25-a: #010101;  --pd25-b: #7fff00;
  --pd26-a: #020202;  --pd26-b: #8000ff;
  --pd27-a: #030303;  --pd27-b: #007fff;
  --pd28-a: #090909;  --pd28-b: #ff8000;
  --pd29-a: #040404;  --pd29-b: #00ff00;
  --pd30-a: #050505;  --pd30-b: #ff00ff;
  --pd31-a: #060606;  --pd31-b: #00ffff;
  --pd32-a: #070707;  --pd32-b: #ffff00;
  --pd33-a: #080808;  --pd33-b: #0000ff;
  --pd34-a: #010101;  --pd34-b: #ff8000;
  --pd35-a: #020202;  --pd35-b: #80ff00;
  --pd36-a: #030303;  --pd36-b: #ff0080;
  --pd37-a: #090909;  --pd37-b: #00ff80;
}

/* =========================================================================
   reset + base
   ========================================================================= */

*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--f-body);
  font-size: 16px;
  line-height: 1.55;
  color: var(--c-fg);
  background: var(--bg-grad);
  background-attachment: fixed;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

[data-fx="on"] body {
  background-image: url(/static/assets/css/images/bg2024.gif);
  background-size: cover;
}

a { color: inherit; text-decoration: none; border-bottom: 1px dotted var(--c-line-2); transition: border-color .15s, color .15s; }
a:hover { border-bottom-color: var(--c-accent); color: var(--c-fg); }
a.plain { border-bottom: none; }

p { margin: 0 0 var(--s-4) 0; color: var(--c-fg-soft); }
strong, b { color: var(--c-fg); font-weight: 600; }

h1, h2, h3, h4 {
  font-family: var(--f-heading);
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.1;
  margin: 0 0 var(--s-3) 0;
  color: var(--c-fg);
}
[data-heading="mono"] h1,
[data-heading="mono"] h2,
[data-heading="mono"] h3,
[data-heading="mono"] h4 {
  font-weight: 500;
  letter-spacing: -0.02em;
  text-transform: none;
}

h1 { font-size: clamp(2.4rem, 5vw, 4rem); }
h2 { font-size: clamp(1.6rem, 3vw, 2.4rem); }
h3 { font-size: 1.15rem; }
h4 { font-size: 1rem; color: var(--c-fg-soft); text-transform: uppercase; letter-spacing: 0.08em; }

code, pre {
  font-family: var(--f-mono);
  font-size: 0.92em;
}
code {
  background: var(--c-bg-2);
  border: 1px solid var(--c-line);
  border-radius: var(--r-1);
  padding: 1px 6px;
  color: var(--c-fg);
}
pre {
  background: var(--c-bg-2);
  border: 1px solid var(--c-line);
  border-radius: var(--r-2);
  padding: var(--s-3) var(--s-4);
  overflow-x: auto;
}

hr {
    border: 1px solid #ffffff20;
}

/* utility: flag-format chip */
.kbd {
  display: inline-block;
  font-family: var(--f-mono);
  font-size: 0.85em;
  background: var(--c-bg-2);
  border: 1px solid var(--c-line);
  border-radius: var(--r-1);
  padding: 1px 6px;
  color: var(--c-fg);
}

/* highlight pill (dates etc.) */
.hl {
  background: color-mix(in oklab, var(--c-accent-2) 18%, transparent);
  border: 1px solid color-mix(in oklab, var(--c-accent-2) 40%, transparent);
  color: var(--c-fg);
  padding: 1px 8px;
  border-radius: var(--r-1);
  font-weight: 500;
  white-space: nowrap;
}

table.matrix tbody tr:hover td { background: color-mix(in oklab, var(--c-yellow) 10%, var(--c-bg-2)); }
table.matrix tbody tr.you:hover td { background: color-mix(in oklab, var(--c-accent) 22%, var(--c-bg-2)); }
table.matrix tbody td.col-hover { background: color-mix(in oklab, var(--c-cyan) 10%, var(--c-bg-2)); }
table.matrix tbody tr:hover td.col-hover { background: color-mix(in oklab, var(--c-cyan) 40%, var(--c-bg-3)); }
tr.you td.col-hover {
  background: color-mix(in oklab, var(--c-accent) 18%, color-mix(in oklab, var(--c-good) 22%, var(--c-bg-2)));
}

h1 .blink,
h2 .blink,
h3 .blink,
h4 .blink {
  display: inline-block;
  vertical-align: text-bottom;
  margin-left: 4px;
}
h2 .blink {
    width: 16px;
    height: 1.1em;
    background: var(--c-accent);
    animation: blink 1s step-end infinite;
}

h3 .blink {
    width: 8px;
    height: 1.1em;
    background: var(--c-accent-2);
    animation: blink 0.9s step-end infinite;
}

/* =========================================================================
   layout: page wrapper, header, nav, main, footer
   ========================================================================= */

.app {
  position: relative;
  z-index: 1;
  max-width: 1440px;
  margin: 0 auto;
  padding: var(--s-5) var(--s-5) var(--s-9);
}

[data-fx="on"] .app {
  backdrop-filter: blur(16px) grayscale(100%) invert(80%);
}

.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--s-3) 0;
  margin-bottom: var(--s-5);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--s-3);
  font-family: var(--f-mono);
  font-weight: 600;
  font-size: 0.92rem;
  letter-spacing: 0.02em;
  border-bottom: none;
  color: var(--c-fg);
}
.brand .mark {
  width: 28px; height: 28px;
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--c-accent);
  color: var(--c-bg);
  border-radius: var(--r-1);
  font-weight: 800;
  font-family: var(--f-mono);
  letter-spacing: 0;
  flex: 0 0 auto;
}

.brand-logo {
  --logo-fill:  var(--c-accent-2);
  --logo-3d:    var(--c-accent);
  --logo-shine: var(--c-accent-2);

  height: 36px;
  width:  auto;
}
.brand-logo:hover {
  --logo-fill:  var(--c-yellow);
  --logo-3d:    var(--c-accent-2);
  --logo-shine: var(--c-yellow);
}

.mobile-menu .brand {
  --logo-fill:  var(--c-accent-2);
  --logo-3d:    var(--c-accent);
  --logo-shine: var(--c-accent-2);
}

.mobile-menu .brand:hover {
  --logo-fill:  var(--c-yellow);
  --logo-3d:    var(--c-accent-2);
  --logo-shine: var(--c-yellow);
}

a.brand {
  display:     inline-flex;
  align-items: center;
  height:      36px;
  flex:        1 1 0;
  min-width:   48px;
}

@media (max-width: 856px) {
  a.brand {
    display: none !important;
  }
}

@media (max-width: 720px) {
  a.brand {
    display: inline-flex !important;
  }
}

/* desktop nav */
.nav {
  display: flex;
  align-items: center;
  gap: var(--s-2);
  font-family: var(--f-mono);
  font-size: clamp(0.75rem, 1.5vw, 0.9rem);
}
.nav .group {
  display: flex;
  align-items: center;
  gap: var(--s-1);
  background: var(--c-bg-2);
  border: 1px solid var(--c-line);
  border-radius: var(--r-pill);
  padding: 4px;
}

/* items are flat by default; edges get rounding from container shape */
.nav a, .nav button.linklike, .nav .group .fx {
  border-bottom: none;
  padding: 6px 14px;
  border-radius: 0;
  color: var(--c-fg-soft);
  background: transparent;
  border: 0;
  font: inherit;
  cursor: pointer;
  transition: color .15s, background .15s;
}
.nav .group > *:first-child                    { border-radius: var(--r-pill) 0 0 var(--r-pill); }
.nav .group > *:last-child,
.nav .group > *:last-child button              { border-radius: 0 var(--r-pill) var(--r-pill) 0; }
.nav .group > *:only-child                     { border-radius: var(--r-pill); }

.nav a:hover, .nav button.linklike:hover, .nav .group .fx:hover {
  color: var(--c-yellow);
  background: color-mix(in oklab, var(--c-accent-2) 18%, transparent);
}
.nav a.active { background: var(--c-accent); color: var(--c-yellow); }

[data-fx="on"] .nav a:hover { animation: shake 100ms ease-in-out infinite; }

/* fx toggle */
.fx {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: var(--r-pill);
  background: var(--c-bg-2);
  border: 1px solid var(--c-line);
  font-family: var(--f-mono);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--c-fg-soft);
  cursor: pointer;
  user-select: none;
}
.fx .led {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--c-fg-mute);
  box-shadow: 0 0 0 0 var(--c-accent);
  transition: background .15s, box-shadow .15s;
}
.fx[data-on="true"] .led { background: var(--c-accent); box-shadow: 0 0 8px var(--c-accent); }
.fx[data-on="true"] { color: var(--c-fg); }

/* hamburger */
.hamburger {
  display: none;
  width: 44px; height: 44px;
  border: 1px solid var(--c-line);
  border-radius: var(--r-2);
  background: var(--c-bg-2);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  padding: 0;
}
.hamburger span {
  display: block;
  width: 18px; height: 2px;
  background: var(--c-fg);
  border-radius: 2px;
  transition: transform .25s, opacity .25s;
}
.hamburger[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.hamburger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* mobile overlay menu */
.mobile-menu {
  position: fixed; inset: 0;
  z-index: 100;
  background: var(--c-bg);
  background-image: var(--bg-active);
  background-attachment: fixed;
  display: flex; flex-direction: column;
  padding: var(--s-5);
  transform: translateY(-12px);
  opacity: 0;
  pointer-events: none;
  transition: opacity .2s, transform .2s;
}
.mobile-menu[data-open="true"] { opacity: 1; transform: none; pointer-events: auto; }
.mobile-menu .top {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: var(--s-7);
}
.mobile-menu nav {
  display: flex; flex-direction: column; gap: var(--s-2);
}
.mobile-menu nav a {
  font-family: var(--f-heading);
  font-size: clamp(2rem, 7vw, 3rem);
  font-weight: 600;
  padding: var(--s-3) 0;
  border-bottom: 1px solid var(--c-line);
  color: var(--c-fg);
  letter-spacing: -0.02em;
}
.mobile-menu nav a.active { color: var(--c-accent); }
.mobile-menu nav a .num {
  font-family: var(--f-mono);
  font-size: 0.7rem;
  color: var(--c-fg-mute);
  margin-right: var(--s-3);
  vertical-align: middle;
}
.mobile-menu .bottom {
  margin-top: auto;
  display: flex; align-items: center; justify-content: space-between;
  font-family: var(--f-mono);
  font-size: 0.78rem;
  color: var(--c-fg-mute);
  padding-top: var(--s-5);
}

/* hero / page header */
.page-head {
  margin-bottom: var(--s-6);
}
.page-head .eyebrow {
  font-family: var(--f-mono);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-fg-mute);
  margin-bottom: var(--s-3);
}
.page-head h1 { margin: 0; }

/* glitch heading: layered offsets driven by data-text */
.glitch {
  position: relative;
  display: inline-block;
}
.glitch::before, .glitch::after {
  content: attr(data-text);
  position: absolute; left: 0; top: 0;
  width: 100%;
  pointer-events: none;
  opacity: 0;
}
[data-fx="on"] .glitch::before {
  color: var(--c-accent);
  opacity: 0.85;
  transform: translate(-2px, 0);
  mix-blend-mode: screen;
  animation: glitch-x 4.2s infinite steps(1);
}
[data-fx="on"] .glitch::after {
  color: var(--c-accent-2);
  opacity: 0.75;
  transform: translate(2px, 0);
  mix-blend-mode: screen;
  animation: glitch-x 3.7s infinite steps(1) reverse;
}

[data-fx="off"] .svg-logo__fill animate,
[data-fx="off"] .svg-logo__3d animate,
[data-fx="off"] .svg-logo__fill,
[data-fx="off"] #chr0, [data-fx="off"] #chr1, [data-fx="off"] #chr2,
[data-fx="off"] #chr3, [data-fx="off"] #chr4, [data-fx="off"] #chr5,
[data-fx="off"] #chr6, [data-fx="off"] #chr7, [data-fx="off"] #chr8,
[data-fx="off"] #chr9, [data-fx="off"] #chr10 {
  opacity: 1;
  background: pink
}

[data-fx="off"] #svg-logo__cursor,
[data-fx="off"] #abbr-cursor {
  display: none;
}

@keyframes glitch-x {
  0%, 92%, 100% { clip-path: inset(0 0 0 0); transform: translate(-2px, 0); }
  93% { clip-path: inset(20% 0 60% 0); transform: translate(3px, -1px); }
  95% { clip-path: inset(60% 0 10% 0); transform: translate(-3px, 1px); }
  97% { clip-path: inset(35% 0 35% 0); transform: translate(2px, -1px); }
}

/* shake — extracted from CSShake, controlled via .shake / .no-shake classes */
@keyframes shake {
  2%  { transform: translate(1.5px,  1.5px) rotate( 1.5deg); }
  4%  { transform: translate( .5px,  -.5px) rotate(  .5deg); }
  6%  { transform: translate(1.5px,  2.5px) rotate( 1.5deg); }
  8%  { transform: translate( .5px,  2.5px) rotate(  .5deg); }
  10% { transform: translate(2.5px,  1.5px) rotate(  .5deg); }
  12% { transform: translate(-.5px, -1.5px) rotate( -.5deg); }
  14% { transform: translate(1.5px,  2.5px) rotate( -.5deg); }
  16% { transform: translate(2.5px, -1.5px) rotate( 1.5deg); }
  18% { transform: translate(2.5px,  2.5px) rotate( -.5deg); }
  20% { transform: translate(-.5px, -1.5px) rotate( 1.5deg); }
  22% { transform: translate(-1.5px,  -.5px) rotate( .5deg); }
  24% { transform: translate(2.5px, -1.5px) rotate( 1.5deg); }
  26% { transform: translate( .5px,  2.5px) rotate( 1.5deg); }
  28% { transform: translate(-.5px,  2.5px) rotate( -.5deg); }
  30% { transform: translate( .5px,  2.5px) rotate( 1.5deg); }
  32% { transform: translate(-1.5px,  -.5px) rotate(-.5deg); }
  34% { transform: translate( .5px,   -.5px) rotate( .5deg); }
  36% { transform: translate(-1.5px,   .5px) rotate(1.5deg); }
  38% { transform: translate(-1.5px,  1.5px) rotate(1.5deg); }
  40% { transform: translate(2.5px,    .5px) rotate( .5deg); }
  0%, 100% { transform: translate(0, 0) rotate(0); }
}

.shake:hover       { animation: shake 100ms ease-in-out infinite; }
.no-shake:hover    { animation: none; }

/* =========================================================================
   forms + buttons
   ========================================================================= */

.btn {
  --btn-color: var(--c-accent-2);

  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--s-2);
  height: 44px;
  padding: var(--s-5);
  border-radius: var(--r-2);
  background: color-mix(in oklab, var(--btn-color) 75%, black);
  border: 2px solid color-mix(in oklab, var(--btn-color) 75%, white);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.18);
  color: var(--btn-color);
  font-family: var(--f-sans-2);
  font-size: 1.2rem;
  letter-spacing: 0.04em;
  cursor: pointer;
  text-decoration: none;
  transition: background .15s, border-color .15s, color .15s, transform 0.1s ease;
  box-sizing: border-box;
}

.btn.primary {
  --btn-color: var(--c-accent);
  color: var(--c-white);
  font-weight: 800;
}

.btn.inline {
  display: inline-block;
}

.btn.ghost { background: transparent; }

.btn:hover {
  //background: color-mix(in oklab, var(--btn-color) 22%, transparent);
  border-color: var(--c-white);
  color: var(--c-white);
  background: color-mix(in oklab, var(--btn-color) 75%, white);
}
.btn.primary:hover {
  border-color: var(--c-yellow);
  color: var(--c-yellow);
}
.btn:active { transform: translateY(1px); }
.btn.primary:active {transform: scale(0.9);}
.btn.primary.copied {
  background-color: #28a74681; /* Optional: turn button green on success */
  border-color: #28a745;
}

.btn.ghost { background: transparent; }

{{/* input[type="text"], input[type="email"], input[type="password"], select, textarea {
  width: 100%;
  height: 44px;
  padding: 0 var(--s-3);
  background: var(--c-bg-2);
  border: 1px solid var(--c-line);
  border-radius: var(--r-2);
  color: var(--c-fg);
  font: inherit;
  font-family: var(--f-mono);
  font-size: 0.92rem;
  transition: border-color .15s, background .15s;
}
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--c-white); color: var(--c-white); background: var(--c-bg-3); }
input::placeholder { color: var(--c-fg-mute); }
input.invalid { border-color: var(--c-bad); }

input:disabled, select:disabled, textarea:disabled {
  background: #00000020;
  color: #ffffff60;
  font-weight: bold;
} */}}

.field { margin-bottom: var(--s-3); }
.field-label {
  display: block;
  font-family: var(--f-mono);
  font-size: 0.84rem;
  font-weight: bold;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--c-fg-mute);
  margin-bottom: var(--s-1);
}

{{/* .radio-group { display: flex; gap: var(--s-2); }
.radio-group label {
  flex: 1;
  display: inline-flex; align-items: center; justify-content: center;
  gap: var(--s-2);
  padding: var(--s-3);
  border: 1px solid var(--c-line);
  border-radius: var(--r-2);
  background: var(--c-bg-2);
  font-family: var(--f-sans);
  font-size: 0.96rem;
  cursor: pointer;
}

.radio-group label span {
  text-shadow: 0 1px 3px rgba(255, 255, 255, 0.4);
}

.radio-group input { display: none; }
.radio-group input:checked + span { color: var(--pl37-a); }
.radio-group label:has(input:checked) { font-weight: bold; border-color: var(--pl37-a); background: color-mix(in oklab, var(--pl37-b) 75%, white); } */}}

/* form layout grid */
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--s-3);
}
.form-grid .span-2 { grid-column: 1 / -1; }

section.error pre {
  border: 0;
  background: var(--c-bad);
  font-size: larger;
}

.field { position: relative; }
.field .err {
  opacity: 0;
  transition: opacity .2s ease;
  pointer-events: none;
  position: absolute;
  right: var(--r-2);
  top: 50%;
  transform: translateY(-50%), display;
  background: var(--c-bg-3);
  border: 1px solid var(--c-bad);
  border-radius: var(--r-2);
  padding: var(--s-1) var(--s-3);
  font-family: var(--f-mono);
  font-size: 0.78rem;
  color: var(--c-bad);
  white-space: nowrap;
  z-index: 10;
  pointer-events: none;
  background: var(--c-bad);
  font-size: smaller;
  padding: 1px 6px;
  color: var(--c-fg);
  border: 1px solid var(--c-line)
}
.field input:focus + .err,
.field select:focus + .err { opacity: 1; pointer-events: auto; }

input.invalid,
select.invalid,
textarea.invalid {

  border-color: var(--c-bad) !important;
  color:        var(--c-white) !important;
}

input.invalid:focus,
select.invalid:focus,
textarea.invalid:focus {

  border-color: var(--c-bad) !important;
  color:        var(--c-white) !important;
  box-shadow:   0 0 0 1px var(--c-bad),
                0 0 12px color-mix(in oklab, var(--c-bad) 40%, transparent) !important;
}

/* =========================================================================
   cards / sections
   ========================================================================= */

.card {
  background: var(--c-bg-2);
  border: 1px solid var(--c-line);
  border-radius: var(--r-3);
  padding: var(--s-5);
  box-shadow: var(--shadow-1);
}

.card-0 {
  padding-bottom: var(--s-7);
  border-bottom: 1px solid var(--c-line-2);
}

.section {
  margin: 0 0 var(--s-7) 0;
}

.divider {
  height: 1px;
  background: var(--c-line);
  margin: var(--s-6) 0;
  border: 0;
}

/* feature trio (prizes) */
.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--s-4);
}
.features .feature {
  background: var(--c-bg-2);
  border: 1px solid var(--c-line);
  border-radius: var(--r-3);
  padding: var(--s-5);
}
.features .feature .ic {
  width: 40px; height: 40px;
  border-radius: var(--r-2);
  background: var(--c-bg-3);
  display: inline-flex; align-items: center; justify-content: center;
  margin-bottom: var(--s-3);
  color: var(--c-accent);
}

/* faq */
.faq { display: grid; gap: 1px; background: var(--c-line); border-radius: var(--r-3); overflow: hidden; }
.faq details {
  background: var(--c-bg-2);
  padding: var(--s-4) var(--s-5);
}
.faq details[open] { background: var(--c-bg-3); }
.faq summary {
  list-style: none;
  cursor: pointer;
  font-family: var(--f-heading);
  font-size: 1.05rem;
  font-weight: 600;
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--s-3);
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  font-family: var(--f-mono);
  font-weight: 400;
  color: var(--c-accent);
  transition: transform .15s;
}
.faq details[open] summary::after { content: "−"; }
.faq details p { margin-top: var(--s-2); margin-bottom: 0; color: var(--c-fg-soft); }

/* meta strip — datelines etc */
.meta-strip {
  display: flex; flex-wrap: wrap; gap: var(--s-3);
  font-family: var(--f-mono);
  font-size: 0.86rem;
  margin-top: var(--s-4);
}
.meta-strip > div { display: inline-flex; align-items: center; gap: var(--s-2); }
.meta-strip .lbl { color: var(--c-fg-mute); text-transform: uppercase; letter-spacing: 0.06em; font-size: 0.74rem; }

/* sponsor card */
.sponsor {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--s-4);
  padding: var(--s-4);
  background: var(--c-bg-2);
  border: 1px solid var(--c-line);
  border-radius: var(--r-3);
  transition: border-color .15s;
}
a.sponsor { border-bottom: 1px solid var(--c-line); }
a.sponsor:hover { border-bottom-color: var(--c-accent); }
.sponsor:hover          { border-color: var(--c-accent); }
.sponsor .info .lbl     { font-family: var(--f-mono); font-size: 0.74rem; color: var(--c-fg-mute); text-transform: uppercase; letter-spacing: 0.08em; }
.sponsor .info .name    { font-family: var(--f-heading); font-size: 1.15rem; font-weight: 600; margin-top: var(--s-1); color: var(--c-fg); }
.sponsor .logo {
  flex: 0 0 auto;
  width: 64px;
  height: 64px;
  border-radius: var(--r-3);
  overflow: hidden;
}
.sponsor .logo img { width: 100%; height: 100%; object-fit: cover; display: block; }

/* =========================================================================
   sponsor cards (sponsors page — larger treatment)
   ========================================================================= */

.sponsor-card {
  display: flex;
  flex-direction: row;
  align-items: flex-start;
  gap: var(--s-5);
  background: var(--c-bg-2);
  border: 1px solid var(--c-line);
  border-radius: var(--r-3);
  padding: var(--s-5);
  box-shadow: var(--shadow-1);
  transition: border-color .15s;
}

.sponsor-card:hover { border-color: var(--c-accent); }

.sponsor-card-logo {
  flex: 0 0 auto;
  width: 112px;
  height: 112px;
  border: 1px solid var(--c-line);
  border-radius: var(--r-3);
  overflow: hidden;
  background: var(--c-bg-3);
  display: flex;
  align-items: center;
  justify-content: center;
}

.sponsor-card-logo img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  border-radius: var(--r-2);
  display: block;
}

.sponsor-card-body { display: flex; flex-direction: column; gap: var(--s-2); flex: 1; }

.sponsor-card-name {
  font-family: var(--f-heading);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--c-fg);
}

.sponsor-card-role {
  font-family: var(--f-mono);
  font-size: 0.74rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--c-fg-mute);
}

.sponsor-card-copy {
  font-family: var(--f-mono);
  font-size: 0.86rem;
  color: var(--c-fg-soft);
  line-height: 1.65;
  margin: 0;
}

.footnotes p {
  margin: 0 0 var(--s-1) 0;
}

.footnotes a {
  border: none;
  font-size: 16px;
  line-height: 1.55;
}

/* =========================================================================
   challenges grid
   ========================================================================= */

.cat-head {
  display: flex; align-items: baseline; gap: var(--s-3);
  margin: var(--s-7) 0 var(--s-4);
}
.cat-head h2 { margin: 0; }
.cat-head .count {
  font-family: var(--f-mono);
  font-size: 0.86rem;
  color: var(--c-fg-mute);
}
.cat-head .progress {
  flex: 1;
  height: 1px;
  background: var(--c-line);
  position: relative;
}
.cat-head .progress::after {
  content: "";
  position: absolute; left: 0; top: 0;
  height: 100%;
  width: var(--p, 0%);
}

/* tile layout: square (default) */
.chal-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: var(--s-3);
}
.chal {
  position: relative;
  aspect-ratio: 1 / 1;
  background: var(--c-bg-2);
  border: 1px solid var(--c-line);
  border-radius: var(--r-3);
  padding: var(--s-4);
  display: flex; flex-direction: column; justify-content: space-between;
  cursor: pointer;
  transition: transform .15s, border-color .15s, background .15s;
  overflow: hidden;
}
.chal:hover { transform: translateY(-2px); border-color: var(--c-accent); }

.chal .top { display: flex; align-items: center; justify-content: space-between; }
.chal .pts { font-family: var(--f-mono); font-size: 1.6rem; font-weight: 600; color: var(--c-fg); letter-spacing: -0.02em; }
.chal .state {
  font-family: var(--f-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--c-fg-mute);
  display: inline-flex; align-items: center; gap: 6px;
}
.chal .state .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--c-fg-mute); }

.chal .title { font-family: var(--f-heading); font-size: 1rem; font-weight: 600; color: var(--c-fg); line-height: 1.25; }
.chal .meta { display: flex; justify-content: space-between; font-family: var(--f-mono); font-size: 0.75rem; color: var(--c-fg-mute); }

/* solved: filled accent */
/* difficulty gradient — easier (low points) → harder (high points) */
.chal.tier-1 {
  --tier-color: var(--c-cyan);            /* easiest — cyan */
  border-color: color-mix(in oklab, var(--tier-color) 35%, var(--c-line));
}
.chal.tier-2 {
  --tier-color: var(--c-blue);            /* blue */
  border-color: color-mix(in oklab, var(--tier-color) 35%, var(--c-line));
}
.chal.tier-3 {
  --tier-color: var(--c-warn);            /* amber */
  border-color: color-mix(in oklab, var(--tier-color) 35%, var(--c-line));
}
.chal.tier-4 {
  --tier-color: var(--c-accent);          /* pink */
  border-color: color-mix(in oklab, var(--tier-color) 35%, var(--c-line));
}
.chal.tier-5 {
  --tier-color: #c084fc;                  /* hardest — violet */
  border-color: color-mix(in oklab, var(--tier-color) 45%, var(--c-line));
}
 
/* title and points both track tier color — instant glance value */
.chal.tier-1 .pts, .chal.tier-1 .title,
.chal.tier-2 .pts, .chal.tier-2 .title,
.chal.tier-3 .pts, .chal.tier-3 .title,
.chal.tier-4 .pts, .chal.tier-4 .title,
.chal.tier-5 .pts, .chal.tier-5 .title { color: var(--tier-color); }
 
.chal.tier-1 .state .dot,
.chal.tier-2 .state .dot,
.chal.tier-3 .state .dot,
.chal.tier-4 .state .dot,
.chal.tier-5 .state .dot { background: var(--tier-color); }
 
/* untouched — mystery box, overrides tier gradient */
.chal.untouched {
  --tier-color: var(--c-fg-mute);
  background: var(--c-bg-2);
  border-color: var(--c-line);
}
.chal.untouched .pts,
.chal.untouched .title { color: var(--c-fg-soft); }
.chal.untouched .state { color: var(--c-fg-mute); }
.chal.untouched .state .dot {
  background: var(--c-fg-mute);
  box-shadow: none;
}
 
/* solved — the only green state, overrides tier gradient AND untouched */
.chal.solved {
  --tier-color: var(--c-good);
  background: color-mix(in oklab, var(--tier-color) 18%, var(--c-bg-2));
  border-color: color-mix(in oklab, var(--tier-color) 65%, var(--c-line));
}
.chal.solved .pts,
.chal.solved .title { color: var(--tier-color); }
.chal.solved .state { color: var(--tier-color); }
.chal.solved .state .dot {
  background: var(--tier-color);
  box-shadow: 0 0 8px var(--tier-color);
}
 
/* ── challenges empty state ──────────────────────────────────────────────── */
 
.chal-empty {
  font-family: var(--f-mono);
  font-size: 1rem;
  color: var(--c-fg-soft);
  background: var(--c-bg-2);
  border: 1px solid var(--c-line);
  border-radius: var(--r-3);
  padding: var(--s-8) var(--s-5);
  text-align: center;
}

/* locked: dimmed */
.chal.locked { opacity: 0.55; cursor: not-allowed; }
.chal.locked:hover { transform: none; border-color: var(--c-line); }
.chal.locked .pts { color: var(--c-fg-mute); }

/* row layout (tweak) */
[data-tile="row"] .chal-grid { display: flex; flex-direction: column; gap: 6px; }
[data-tile="row"] .chal {
  aspect-ratio: auto;
  flex-direction: row;
  align-items: center;
  gap: var(--s-4);
  padding: var(--s-3) var(--s-4);
}
[data-tile="row"] .chal .top { order: 0; flex: 0 0 auto; min-width: 60px; }
[data-tile="row"] .chal .title { flex: 1; }
[data-tile="row"] .chal .meta { flex: 0 0 auto; min-width: 140px; justify-content: flex-end; gap: var(--s-3); }
[data-tile="row"] .chal .pts { font-size: 1.1rem; }

/* compact (tweak) */
[data-tile="compact"] .chal-grid {
  display: flex; flex-wrap: wrap; gap: 6px;
}
[data-tile="compact"] .chal {
  aspect-ratio: auto;
  padding: 6px 12px;
  border-radius: var(--r-pill);
  flex-direction: row;
  align-items: center;
  gap: 8px;
  font-family: var(--f-mono);
  font-size: 0.86rem;
}
[data-tile="compact"] .chal .top, [data-tile="compact"] .chal .meta { display: none; }
[data-tile="compact"] .chal::before {
  content: attr(data-pts);
  font-family: var(--f-mono);
  font-weight: 600;
  color: var(--c-fg-soft);
  background: var(--c-bg-3);
  padding: 2px 8px;
  border-radius: var(--r-pill);
  font-size: 0.75rem;
}

/* =========================================================================
   modal (challenge detail)
   ========================================================================= */

.modal-back {
  position: fixed; inset: 0; z-index: 200;
  background: rgba(5,7,16,0.7);
  backdrop-filter: blur(8px);
  align-items: center; justify-content: center;
  padding: var(--s-4);
}

dialog.modal-back[open] {
  display: flex;
}

.modal {
  width: 100%;
  max-width: 540px;
  background: var(--c-bg-3);
  border: 1px solid var(--c-line-2);
  border-radius: var(--r-3);
  padding: var(--s-5);
  box-shadow: var(--shadow-2);
  max-height: calc(100vh - var(--s-6));
  overflow-y: auto;
}
.modal .head { display: flex; align-items: flex-start; justify-content: space-between; gap: var(--s-3); margin-bottom: var(--s-3); }
.modal .tags { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: var(--s-2); }
.modal .tag {
  font-family: var(--f-mono); font-size: 0.72rem;
  text-transform: uppercase; letter-spacing: 0.08em;
  background: var(--c-bg-2);
  border: 1px solid var(--c-line);
  padding: 2px 8px;
  border-radius: var(--r-pill);
  color: var(--c-fg-soft);
}
.modal .x {
  background: transparent; border: 1px solid var(--c-line);
  width: 32px; height: 32px; border-radius: var(--r-2);
  cursor: pointer; color: var(--c-fg);
  font-family: var(--f-mono);
}
.modal .stats {
  display: grid; grid-template-columns: 1fr 1fr; gap: var(--s-3);
  font-family: var(--f-mono); font-size: 0.86rem;
  margin: var(--s-4) 0;
}
.modal .stats div { display: flex; justify-content: space-between; padding: var(--s-2) var(--s-3); background: var(--c-bg-2); border: 1px solid var(--c-line); border-radius: var(--r-2); }
.modal .stats .lbl { color: var(--c-fg-mute); text-transform: uppercase; font-size: 0.74rem; letter-spacing: 0.06em; }
.modal .files { display: flex; gap: var(--s-2); flex-wrap: wrap; margin: var(--s-4) 0; }
.modal .desc { color: var(--c-fg-soft); margin-bottom: var(--s-4); }
.modal .submit-row { display: flex; gap: var(--s-2); }
.modal .submit-row input { flex: 1; }
.modal .msg { font-family: var(--f-mono); font-size: 0.86rem; margin-top: var(--s-3); color: var(--c-bad); }
.modal .msg.good { color: var(--c-good); }

/* =========================================================================
   modal — delta to merge into new.css
   ========================================================================= */

/* 1. Remove display:flex from .modal-back and scope it to [open] only */
.modal-back {
  position: fixed; inset: 0; z-index: 200;
  background: transparent;
  border: none; padding: 0;
  max-width: 100vw; max-height: 100vh;
  width: 100%; height: 100%;
  align-items: center; justify-content: center;
}

dialog.modal-back[open] { display: flex; }

/* 2. Blur via ::backdrop instead of on the element itself */
dialog.modal-back::backdrop {
  background: rgba(5, 7, 16, 0.75);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

/* 3. Modal card — add flex column + gap to replace per-child margins */
.modal {
  width: 100%;
  max-width: 540px;
  background: var(--c-bg-3);
  border: 1px solid var(--c-line-2);
  border-radius: var(--r-3);
  padding: var(--s-5);
  box-shadow: var(--shadow-2);
  max-height: calc(100vh - var(--s-6));
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: var(--s-4);
}

/* 4. Close button hover */
.modal .x:hover { border-color: var(--c-accent); color: var(--c-accent); }

/* 5. Flag input — scoped to .modal so it inherits correctly */
.modal .submit-row { display: flex; gap: var(--s-2); align-items: stretch; flex-wrap: wrap; }

.modal .submit-row input[type="text"] {
  flex: 1; min-width: 0;
  height: 52px;
  padding: 0 var(--s-3);
  background: var(--c-bg-2);
  border: 1px solid var(--c-line-2);
  border-radius: var(--r-2);
  color: var(--c-fg);
  font-family: var(--f-mono);
  font-size: 0.92rem;
  transition: border-color .1s ease-in, background .1s ease-in, box-shadow .1s ease-in;
}

.modal .submit-row input[type="text"]::placeholder { color: var(--c-fg-mute); }

.modal .submit-row input[type="text"]:hover {
  border-color: var(--c-white-35);
  background: var(--c-bg-3);
}

.modal .submit-row input[type="text"]:focus {
  outline: none;
  border-color: var(--c-white);
  background: var(--c-bg-3);
  color: var(--c-white);
  box-shadow: 0 0 0 1px var(--c-cyan),
              0 0 12px color-mix(in oklab, var(--c-cyan) 40%, transparent);
}

.modal .msg { width: 100%; font-family: var(--f-mono); font-size: 0.86rem; color: var(--c-accent); min-height: 1.2em; }
.modal .msg.good { color: var(--c-good); }

.modal .command {
text-align: center;
  font-size: x-large;
  font-weight: bold;
  color: var(--c-accent-2);
  background-color: var(--c-bg-2);
  padding: 8px;
  border: 1px solid var(--c-line);
  border-radius: var(--r-2);
}

/* =========================================================================
   speed pwn mini-scoreboard
   ========================================================================= */

.speed-board {
  border-top: 1px solid var(--c-line);
  padding-top: var(--s-3);
}

.speed-board summary {
  list-style: none;
  cursor: pointer;
  font-family: var(--f-mono);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--c-fg-mute);
  display: flex; align-items: center; justify-content: space-between;
  user-select: none;
}
.speed-board summary::-webkit-details-marker { display: none; }
.speed-board summary::after { content: "+"; color: var(--c-accent); transition: transform .15s; }
.speed-board[open] summary::after { content: "−"; }

.speed-board .board-rows { margin-top: var(--s-3); display: flex; flex-direction: column; gap: 2px; }

.speed-board .board-row {
  display: grid;
  grid-template-columns: 28px 1fr auto auto;
  align-items: center;
  gap: var(--s-3);
  padding: var(--s-2) var(--s-3);
  background: var(--c-bg-2);
  border: 1px solid var(--c-line);
  border-radius: var(--r-1);
  font-family: var(--f-mono);
  font-size: 0.82rem;
}

.speed-board .board-row .pos          { color: var(--c-fg-mute); text-align: center; font-size: 0.75rem; }
.speed-board .board-row .pos.gold     { color: gold; }
.speed-board .board-row .pos.silver   { color: silver; }
.speed-board .board-row .pos.bronze   { color: #cd7f32; }
.speed-board .board-row .who          { color: var(--c-fg); font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.speed-board .board-row .time         { color: var(--c-fg-mute); font-size: 0.78rem; white-space: nowrap; }
.speed-board .board-row .pts          { color: var(--c-accent); font-weight: 600; white-space: nowrap; }

/* =========================================================================
   scoreboard
   ========================================================================= */

.empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--s-5);
  padding: var(--s-8) var(--s-5);
  background: var(--c-bg-2);
  border: 1px solid var(--c-line);
  border-radius: var(--r-3);
  text-align: center;
}

.empty-podium {
  display: flex;
  align-items: flex-end;
  gap: var(--s-2);
  height: 96px;
}

.empty-podium .slot {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  gap: var(--s-1);
}

.empty-podium .block {
  width: 48px;
  border-radius: var(--r-1) var(--r-1) 0 0;
  border: 1px solid var(--c-line-2);
  background: var(--c-bg-3);
  position: relative;
  overflow: hidden;
}

.empty-podium .block::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(90deg, transparent 0%, rgba(255,255,255,0.06) 50%, transparent 100%);
  background-size: 200% 100%;
  animation: shimmer 2s ease-in-out infinite;
}

@keyframes shimmer {
  0%   { background-position: -200% 0; }
  100% { background-position:  200% 0; }
}

.empty-podium .slot-1 .block { height: 80px; border-color: color-mix(in oklab, gold   40%, transparent); }
.empty-podium .slot-2 .block { height: 56px; border-color: color-mix(in oklab, silver  40%, transparent); }
.empty-podium .slot-3 .block { height: 40px; border-color: color-mix(in oklab, #cd7f32 40%, transparent); }

.empty-podium .medal    { font-size: 1.4rem; line-height: 1; }
.empty-podium .question { font-family: var(--f-mono); font-size: 0.72rem; color: var(--c-fg-mute); letter-spacing: 0.06em; }

.empty h3 { font-family: var(--f-heading); font-size: 1.15rem; font-weight: 600; color: var(--c-fg); margin: 0; }
.empty p  { font-family: var(--f-mono); font-size: 0.86rem; color: var(--c-fg-mute); margin: 0; max-width: 36ch; line-height: 1.7; }

.empty .blink {
  display: inline-block;
  width: 8px; height: 1.1em;
  background: var(--c-accent);
  vertical-align: text-bottom;
  margin-left: 2px;
  animation: blink 1s step-end infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0; }
}

.score-summary {
  display: flex; gap: var(--s-5); flex-wrap: wrap;
  font-family: var(--f-mono);
  margin-bottom: var(--s-4);
}
.score-summary .stat {
  background: var(--c-bg-2);
  border: 1px solid var(--c-line);
  border-radius: var(--r-3);
  padding: var(--s-3) var(--s-5);
  flex: 1; min-width: 180px;
}
.score-summary .stat .lbl { color: var(--c-fg-mute); text-transform: uppercase; font-size: 0.74rem; letter-spacing: 0.08em; }
.score-summary .stat .val { font-size: 1.6rem; color: var(--c-fg); font-weight: 600; letter-spacing: -0.02em; }

.score-tabs {
  display: inline-flex;
  background: var(--c-bg-2);
  border: 1px solid var(--c-line);
  border-radius: var(--r-pill);
  padding: 4px;
  font-family: var(--f-mono);
  font-size: 0.86rem;
  margin-bottom: var(--s-4);
}
.score-tabs button {
  border: 0; background: transparent;
  padding: 6px 16px; border-radius: var(--r-pill);
  color: var(--c-fg-soft); cursor: pointer;
  font: inherit;
}
.score-tabs button.active { background: var(--c-fg); color: var(--c-bg); }

/* matrix — desktop */
.matrix-wrap {
  background: var(--c-bg-2);
  border: 1px solid var(--c-line);
  border-radius: var(--r-3);
  overflow: hidden;
}

.matrix-scroll {
  overflow-x: auto;
  scrollbar-width: thin;
}

table.matrix {
  border-collapse: collapse;
  font-family: var(--f-mono);
  font-size: 0.86rem;
  width: 100%;
}

table.matrix th, table.matrix td {
  text-align: left;
  border-bottom: 1px solid var(--c-line);
  white-space: nowrap;
}

/* headers — diagonal, overflow upward */
table.matrix thead th {
  background: var(--c-bg-3);
  position: sticky; top: 0; z-index: 2;
  color: var(--c-fg-mute);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-size: 0.74rem;
  vertical-align: bottom;
  height: 150px;
  padding: 0;
  overflow: visible;
}

table.matrix thead th .rot {
  display: inline-block;
  transform: rotate(-55deg);
  transform-origin: left bottom;
  position: relative;
  left: 50%;
  bottom: 6px;
  width: auto;
  white-space: nowrap;
  line-height: 1;
}

/* sticky left columns — rank, score, team */
table.matrix td.rank, table.matrix td.team, table.matrix td.score,
table.matrix thead th.fixed-l {
  position: sticky;
  z-index: 1;
}

table.matrix thead th.fixed-l {
  background: var(--c-bg-3);
  z-index: 3;
  height: auto;
  text-align: left;
}

table.matrix thead th.fixed-l .rot { display: none; }

table.matrix td.rank,
table.matrix thead th.fixed-l:nth-child(1) {
  left: 0;
  width: 24px;
  max-width: 24px;
  padding: 8px 4px;
  text-align: left;
  color: var(--c-fg-mute);
}

table.matrix td.score,
table.matrix thead th.fixed-l:nth-child(2) {
  left: 24px;
  width: 36px;
  max-width: 36px;
  padding: 8px 4px;
  color: var(--c-fg);
  font-weight: 600;
}

table.matrix td.team,
table.matrix thead th.fixed-l:nth-child(3) {
  left: 60px;
  width: 120px;
  max-width: 120px;
  min-width: 100px;
  padding: 8px 6px;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--c-fg);
}

table.matrix td.rank, table.matrix td.team, table.matrix td.score {
  background: var(--c-bg-2);
}

/* you-row highlight */
table.matrix tbody tr.you td {
  background: color-mix(in oklab, var(--c-accent) 14%, var(--c-bg-2));
}

/* chall cells — body defines width, header inherits */
table.matrix td.cell {
  text-align: center;
  width: 18px;
  min-width: 18px;
  max-width: 18px;
  padding: 6px 2px;
  color: var(--c-fg-mute);
  font-size: 0.78rem;
}

table.matrix td.cell.solved { color: var(--c-accent); }
table.matrix td.cell .rank-1 { color: gold; }
table.matrix td.cell .rank-2 { color: silver; }
table.matrix td.cell .rank-3 { color: #cd7f32; }

/* podium */
.podium { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: var(--s-3); margin-bottom: var(--s-5); }
.podium .p {
  background: var(--c-bg-2);
  border: 1px solid var(--c-line);
  border-radius: var(--r-3);
  padding: var(--s-4);
  display: flex; align-items: center; gap: var(--s-3);
}
.podium .p .place { font-family: var(--f-mono); font-size: 2.8rem; font-weight: 600; color: var(--c-fg-mute); width: 40px; }
.podium .p.gold .place { color: gold; }
.podium .p.silver .place { color: silver; }
.podium .p.bronze .place { color: #cd7f32; }
.podium .p .who { flex: 1; }
.podium .p .name { font-family: var(--f-heading); font-weight: 600; }
.podium .p .pts { font-family: var(--f-mono); color: var(--c-fg-soft); font-size: 0.86rem; }

/* mobile ranked list (hidden on desktop) */
.score-list { display: none; }

/* =========================================================================
   settings
   ========================================================================= */

pre.token {
  display: flex;
  align-items: center; /* Forces children (code and button) to the same height */
  border-radius: 4px;
  overflow: hidden; 
  font-size: 1.2em;
  padding: 10px;
  font-weight: bold;
  line-height: 2.1em;
  gap: 5px;
  margin: 0 0 2px 0;
}

pre.token .code {
  background: var(--c-bg-2);
}

pre.token .btn {
  padding: 10px;       /* Adjust padding to your liking */
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  flex-shrink: 0;
  gap: 5px;
  width: 50px;
  color: var(--c-white)
}

#gameToken, #inviteURL {
  flex-grow: 1;        /* Makes the code block take up remaining space */
}

#copyBtn,#refreshBtn {
  border-radius: 4px;    /* Square off corners to sit flush against the code */
  flex-shrink: 0;
}

/* =========================================================================
   footer
   ========================================================================= */

.footer {
  margin-top: var(--s-8);
  padding-top: var(--s-5);
  border-top: 1px solid var(--c-line);
  display: flex; align-items: center; justify-content: space-between;
  font-family: var(--f-mono); font-size: 0.78rem; color: var(--c-fg-mute);
  gap: var(--s-4);
}
.footer .socials { display: flex; gap: var(--s-2); }
.footer .socials a {
  width: 36px; height: 36px;
  display: inline-flex; align-items: center; justify-content: center;
  border: 1px solid var(--c-line);
  border-radius: var(--r-2);
  border-bottom: 1px solid var(--c-line);
}
.footer .socials a:hover { border-color: var(--c-accent); color: var(--c-accent); }

/* =========================================================================
   error pages
   ========================================================================= */

.error-screen {
  min-height: 60vh;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  text-align: center;
  gap: var(--s-3);
}
.error-screen .code {
  font-family: var(--f-mono);
  font-size: clamp(6rem, 18vw, 12rem);
  font-weight: 700;
  letter-spacing: -0.05em;
  line-height: 1;
  color: var(--c-fg);
  margin: 0;
}
.error-screen .code .digit { color: var(--c-accent); }
.error-screen p { max-width: 480px; }

/* =========================================================================
   spotlight (home hero)
   ========================================================================= */

.hero {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: var(--s-7);
  align-items: center;
  background: var(--c-bg-4);
  padding: var(--s-4) var(--s-5);
  border-radius: var(--r-3);
}
.hero h1 .accent { color: var(--c-accent); }
.hero .lede { font-size: 1.05rem; color: var(--c-fg-soft); max-width: 52ch; margin-bottom: var(--s-4); }
.hero .ctas { display: flex; flex-wrap: wrap; gap: var(--s-2); margin-top: var(--s-8); }
.hero .img-slot {
  position: relative;
  aspect-ratio: 1 / 1;
  border-radius: var(--r-3);
  background: repeating-linear-gradient(135deg,
    var(--c-bg-2) 0 14px,
    var(--c-bg-3) 14px 28px);
  border: 1px solid var(--c-line);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--f-mono);
  font-size: 0.78rem;
  color: var(--c-fg-mute);
  text-align: center;
  padding: var(--s-3);
}

/* announcement strip */
.announce {
  display: inline-flex; align-items: center; gap: var(--s-2);
  font-family: var(--f-mono);
  font-size: 0.82rem;
  background: var(--c-bg-2);
  border: 1px solid var(--c-line);
  border-radius: var(--r-pill);
  padding: 6px 14px;
  margin-bottom: var(--s-4);
  color: var(--c-fg-soft);
}
.announce .pulse {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--c-accent);
  box-shadow: 0 0 0 0 var(--c-accent);
  animation: pulse 1.8s infinite;
}
@keyframes pulse {
  0% { box-shadow: 0 0 0 0 color-mix(in oklab, var(--c-accent) 60%, transparent); }
  70% { box-shadow: 0 0 0 10px transparent; }
  100% { box-shadow: 0 0 0 0 transparent; }
}

/* =========================================================================
   responsive
   ========================================================================= */

@media (max-width: 920px) {
  .hero { grid-template-columns: 1fr; gap: var(--s-5); }
  .features { grid-template-columns: 1fr 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .podium { grid-template-columns: 1fr; }
}

@media (max-width: 780px) {
  .nav a[href*="discord"] svg { display: none; }
  .nav                        { font-weight: 600; }
}

@media (max-width: 720px) {
  .app { padding: var(--s-4) var(--s-4) var(--s-8); }
  .nav { display: none; }
  .hamburger { display: inline-flex; }
  .features { grid-template-columns: 1fr; }
  .brand .full { display: none; }
  .brand .short { display: inline; }
  .footer { flex-direction: column; align-items: flex-start; gap: var(--s-3); }
  .matrix-wrap { display: none; }
  .score-list { display: block; }
}

@media (max-width: 480px) {
  .chal-grid { grid-template-columns: repeat(2, 1fr); }
  h1 { font-size: 2.4rem; }
}

/* =========================================================================
   interactive states — fields, radios
   depends on: palette.css (or equivalent vars in main sheet)
   ========================================================================= */

input[type="text"],
input[type="email"],
input[type="password"],
select,
textarea {

  width:         100%; 
  height:        44px;
  padding:       0 var(--s-3);
  background:    var(--c-bg-2);
  border:        1px solid var(--c-line);
  border-radius: var(--r-2);
  color:         var(--c-fg);
  font:          inherit;
  font-family:   var(--f-mono);
  font-size:     0.92rem;

  transition:
    border-color  .1s ease-in,
    background    .1s ease-in,
    box-shadow    .1s ease-in,
    color         .1s ease-in;
}

input[type="text"]:hover,
input[type="email"]:hover,
input[type="password"]:hover,
select:hover,
textarea:hover {

  border-color: color-mix(in oklab, var(--c-white) 55%, transparent);
  background:   var(--c-bg-3);
  transition:
    border-color  .25s ease-out,
    background    .25s ease-out,
    box-shadow    .25s ease-out;
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="password"]:focus,
select:focus,
textarea:focus {

  outline:      none;
  border-color: var(--c-white);
  background:   var(--c-bg-3);
  color:        var(--c-white);
  box-shadow:   0 0 0 1px var(--c-cyan),
                0 0 12px color-mix(in oklab, var(--c-cyan) 40%, transparent);
  transition:
    border-color  .1s ease-in,
    background    .1s ease-in,
    box-shadow    .1s ease-in,
    color         .1s ease-in;
}

input:disabled,
select:disabled,
textarea:disabled {

  background:  #ffffff10;
  color:       #ffffff60;
  font-weight: bold;
}

/* -------------------------------------------------------------------------
   radio group — button-style, one selectable at a time
   ------------------------------------------------------------------------- */

.radio-group {
  width: 100%;
  display: flex;
  gap: 10px;
  gap: var(--s-2);
}

.radio-group input {
  display: none;
}

.radio-group label {

  cursor: pointer;
  //transition:
  //  background    .1s ease-in,
  //  border-color  .1s ease-in,
  //  color         .1s ease-in;

  flex: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--s-2);
  padding: var(--s-3);
  border: 1px solid var(--c-line);
  border-radius: var(--r-2);
  background: var(--c-bg-2);
  font-family: var(--f-sans);
  font-size: larger;
  cursor: pointer;
}

/* hover: unselected */
.radio-group label:not(:has(input:checked)):hover {

  border-color: var(--c-cyan);
  background:   var(--c-bg-3);
  color:        var(--c-fg);
  transition:
    background    .25s ease-out,
    border-color  .25s ease-out,
    color         .25s ease-out;
}

/* selected */
.radio-group label:has(input:checked) {

  background:   var(--c-yellow);
  border-color: var(--c-pink);
  color:        var(--c-pink);
  font-weight:  bold;
}

/* hover: selected — inverted clash */
.radio-group label:has(input:checked):hover {

  background:   var(--c-yellow);
  border-color: var(--c-pink);
  color:        var(--c-pink);
  transition:
    background    .25s ease-out,
    border-color  .25s ease-out,
    color         .25s ease-out;
}

/* text inside label inherits cleanly */
.radio-group label span {

  pointer-events: none;
  text-shadow:    0 1px 3px rgba(255, 255, 255, 0.4);
}