/* ============ The Auction, In Human Terms · The Growth Den Lab ============ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; -webkit-tap-highlight-color: transparent; }

:root {
  --purple:  #341f44;
  --deep:    #1a1025;
  --blue:    #256493;
  --red:     #e5340b;
  --accent:  #fe7c2b;   /* YOUR AD — everywhere */
  --gold:    #ffc545;
  --cream:   #fcf3d6;
  --white:   #fefefe;
  --muted:   rgba(252,243,214,.62);
  --line:    rgba(252,243,214,.14);
  --card:    rgba(26,16,37,.55);
  --r: 20px;
  --topbar-h: 64px;
  --rail-w: 150px;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Poppins', sans-serif;
  font-weight: 300;
  color: var(--cream);
  background: var(--purple);
  background-image:
    radial-gradient(ellipse 90% 55% at 75% 8%, rgba(37,100,147,.4) 0%, transparent 60%),
    radial-gradient(ellipse 55% 40% at 8% 90%, rgba(229,52,11,.14) 0%, transparent 55%);
  background-attachment: fixed;
  overflow-x: hidden;
}

img { display: block; max-width: 100%; }
a { color: var(--gold); }
b { font-weight: 600; }

/* ---------- dual-register copy: crossfade in place ---------- */
.dual { display: grid; }
.dual > * { grid-area: 1 / 1; transition: opacity .38s ease; }
.dual-inline { display: inline-grid; vertical-align: baseline; }
.dual-inline > * { grid-area: 1 / 1; transition: opacity .38s ease; white-space: nowrap; }
body.mode-kid .cmo,
body.mode-cmo .kid { opacity: 0; pointer-events: none; user-select: none; }

/* ---------- top bar ---------- */
#topbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 60;
  height: var(--topbar-h);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 18px;
  background: linear-gradient(rgba(26,16,37,.85), rgba(26,16,37,0));
  pointer-events: none;
}
#topbar > * { pointer-events: auto; }
.logo { display: flex; align-items: center; gap: 8px; }
.logo img { height: 34px; width: auto; }
.lab-tag {
  font-size: 11px; font-weight: 700; letter-spacing: .14em;
  color: var(--deep); background: var(--gold);
  padding: 2px 10px; border-radius: 100px; transform: rotate(-3deg);
}
.mode-toggle {
  display: flex; border: 1.5px solid rgba(252,243,214,.45);
  border-radius: 100px; overflow: hidden;
  background: rgba(26,16,37,.7); backdrop-filter: blur(8px);
}
.mode-btn {
  font-family: 'Poppins', sans-serif; font-weight: 600; font-size: 12px;
  border: none; background: transparent; color: var(--muted);
  padding: 9px 14px; cursor: pointer; white-space: nowrap; min-height: 40px;
  transition: background .25s, color .25s;
}
.mode-btn.active { background: var(--cream); color: var(--deep); }

/* ---------- progress rail ---------- */
#rail {
  position: fixed; left: 18px; top: 50%; transform: translateY(-50%);
  z-index: 50; display: flex; gap: 14px; align-items: stretch;
}
.rail-track {
  width: 3px; border-radius: 2px; background: var(--line);
  position: relative; overflow: hidden;
}
.rail-fill {
  position: absolute; top: 0; left: 0; width: 100%; height: 0%;
  background: linear-gradient(var(--gold), var(--accent));
  border-radius: 2px;
}
#railDots { list-style: none; display: flex; flex-direction: column; justify-content: space-between; padding: 2px 0; }
#railDots li { display: flex; align-items: center; gap: 9px; cursor: pointer; padding: 4px 0; }
#railDots i {
  width: 9px; height: 9px; border-radius: 50%; flex: 0 0 auto;
  background: transparent; border: 1.5px solid var(--muted);
  transition: all .25s;
}
#railDots span {
  font-size: 11px; font-weight: 500; letter-spacing: .06em; color: var(--muted);
  opacity: 0; transform: translateX(-4px); transition: all .25s;
}
#railDots li.active i { background: var(--accent); border-color: var(--accent); box-shadow: 0 0 10px rgba(254,124,43,.8); }
#railDots li.active span { opacity: 1; transform: none; color: var(--cream); }
#railDots li:hover span { opacity: .8; transform: none; }

/* ---------- hero ---------- */
#hero {
  min-height: 92svh;
  display: flex; flex-direction: column; justify-content: center; align-items: center;
  text-align: center; padding: calc(var(--topbar-h) + 24px) 24px 40px;
  position: relative;
}
.kicker {
  font-size: 12px; font-weight: 600; letter-spacing: .18em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 14px;
}
#hero h1 {
  font-size: clamp(44px, 8.5vw, 96px); font-weight: 800; line-height: 1.02;
  letter-spacing: -.02em; color: var(--white);
}
#hero h1 em { font-style: normal; color: var(--gold); }
.hero-sub { max-width: 560px; margin: 24px auto 0; }
.hero-sub p { font-size: 17px; line-height: 1.65; color: var(--muted); }
.hero-legend {
  margin-top: 26px; font-size: 14px; color: var(--muted);
  display: flex; align-items: center; gap: 8px;
}
.you-dot {
  width: 16px; height: 16px; border-radius: 50%; display: inline-block;
  background: var(--accent); box-shadow: 0 0 14px rgba(254,124,43,.9);
}
.scroll-cue {
  position: absolute; bottom: 26px; left: 50%; transform: translateX(-50%);
  font-size: 12px; letter-spacing: .2em; text-transform: uppercase; color: var(--muted);
  display: flex; flex-direction: column; align-items: center; gap: 2px;
}
.scroll-cue i { font-style: normal; font-size: 18px; animation: cue 1.6s ease-in-out infinite; }
@keyframes cue { 0%,100% { transform: translateY(0); opacity: .6; } 50% { transform: translateY(7px); opacity: 1; } }

/* ---------- pinned steps ---------- */
.step { position: relative; }
.step:not(.sandbox) { min-height: 235svh; }
.pin { position: sticky; top: 0; height: 100svh; overflow: hidden; display: flex; align-items: center; }
.step-grid {
  width: 100%; max-width: 1180px; margin: 0 auto;
  padding: calc(var(--topbar-h) + 8px) 32px 24px calc(var(--rail-w) + 32px);
  display: grid; grid-template-columns: minmax(300px, 430px) 1fr;
  gap: 40px; align-items: center; height: 100%;
}
.copy h2 {
  font-size: clamp(26px, 3.2vw, 40px); font-weight: 700; line-height: 1.15;
  letter-spacing: -.01em; color: var(--white); margin-bottom: 16px;
}
.body p { font-size: 15.5px; line-height: 1.7; color: var(--muted); margin-bottom: 12px; }
.body b { color: var(--cream); }
.body i { color: var(--cream); }

.formula {
  font-size: 14px; font-weight: 500; color: var(--cream);
  background: var(--card); border: 1px solid var(--line); border-radius: 14px;
  padding: 12px 16px; margin-bottom: 16px; line-height: 1.6;
}
.f-bid { color: var(--gold); }
.f-rate { color: var(--accent); }
.f-quality { color: #7fc8f0; }

.stage {
  position: relative; height: min(72svh, 620px); min-height: 340px;
  border: 1px solid var(--line); border-radius: var(--r);
  background: var(--card); overflow: hidden;
  box-shadow: 0 24px 60px rgba(0,0,0,.35);
}
.stage canvas { position: absolute; inset: 0; width: 100%; height: 100%; touch-action: pan-y; }
.scene-caption {
  position: absolute; left: 12px; right: 12px; bottom: 12px;
  text-align: center; font-size: 13.5px; font-weight: 500; color: var(--cream);
  background: rgba(26,16,37,.78); backdrop-filter: blur(6px);
  border: 1px solid var(--line); border-radius: 12px; padding: 9px 14px;
  pointer-events: none; min-height: 38px;
}
.dual-cap { display: grid; align-items: center; }
.dual-cap > * { grid-area: 1 / 1; transition: opacity .38s ease; }

/* ---------- sandbox ---------- */
.sandbox { padding: 12svh 32px 10svh calc(var(--rail-w) + 32px); }
.sandbox-inner { max-width: 1180px; margin: 0 auto; }
.sandbox-copy { max-width: 640px; margin-bottom: 26px; }
.sandbox-copy h2 { font-size: clamp(28px, 3.4vw, 44px); font-weight: 700; color: var(--white); margin-bottom: 14px; }

.arena-wrap {
  position: relative; height: min(58svh, 520px); min-height: 320px;
  border: 1px solid var(--line); border-radius: var(--r);
  background: var(--card); overflow: hidden;
  box-shadow: 0 24px 60px rgba(0,0,0,.35);
}
#arenaCanvas { position: absolute; inset: 0; width: 100%; height: 100%; touch-action: manipulation; }
.arena-toast {
  position: absolute; top: 14px; left: 50%; transform: translateX(-50%);
  font-size: 15px; font-weight: 600; color: var(--deep);
  background: var(--gold); border-radius: 100px; padding: 8px 20px;
  opacity: 0; transition: opacity .3s, transform .3s; pointer-events: none;
  white-space: nowrap; max-width: 92%;
}
.arena-toast.show { opacity: 1; transform: translateX(-50%) translateY(4px); }

.deck {
  margin-top: 18px; border: 1px solid var(--line); border-radius: var(--r);
  background: rgba(26,16,37,.7); padding: 18px 20px;
}
.deck-sliders { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.ctl { display: flex; flex-direction: column; gap: 8px; }
.ctl-name { font-size: 13px; font-weight: 600; letter-spacing: .04em; color: var(--cream); }
.ctl-val { font-size: 18px; font-weight: 700; color: var(--accent); }
.ctl input[type="range"] {
  -webkit-appearance: none; appearance: none;
  width: 100%; height: 40px; background: transparent; cursor: pointer;
}
.ctl input[type="range"]::-webkit-slider-runnable-track {
  height: 8px; border-radius: 6px; background: rgba(252,243,214,.18);
}
.ctl input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none;
  width: 26px; height: 26px; margin-top: -9px; border-radius: 50%;
  background: var(--accent); border: 3px solid var(--deep);
  box-shadow: 0 0 12px rgba(254,124,43,.7);
}
.ctl input[type="range"]::-moz-range-track { height: 8px; border-radius: 6px; background: rgba(252,243,214,.18); }
.ctl input[type="range"]::-moz-range-thumb {
  width: 22px; height: 22px; border-radius: 50%;
  background: var(--accent); border: 3px solid var(--deep);
}
.fresh-bar {
  height: 14px; border-radius: 8px; background: rgba(252,243,214,.15);
  overflow: hidden; margin-top: 6px;
}
.fresh-bar i {
  display: block; height: 100%; width: 100%;
  background: linear-gradient(90deg, var(--accent), var(--gold));
  border-radius: 8px; transition: width .3s;
}
.chip-btn {
  font-family: 'Poppins', sans-serif; font-weight: 600; font-size: 12.5px;
  color: var(--cream); background: transparent;
  border: 1.5px solid rgba(252,243,214,.4); border-radius: 100px;
  padding: 8px 14px; cursor: pointer; min-height: 38px;
  align-self: flex-start;
}
.chip-btn:hover { border-color: var(--cream); }
.deck-actions { display: flex; gap: 12px; flex-wrap: wrap; margin: 20px 0 16px; }
.run-btn {
  font-family: 'Poppins', sans-serif; font-weight: 700; font-size: 16px;
  background: var(--accent); color: var(--white);
  border: none; border-radius: 100px; padding: 13px 28px; min-height: 52px;
  cursor: pointer; box-shadow: 0 4px 20px rgba(254,124,43,.45);
  transition: transform .12s, box-shadow .12s;
}
.run-btn:hover { transform: translateY(-2px); }
.run-btn:active { transform: scale(.97); }
.run-btn.ghost { background: transparent; color: var(--cream); border: 2px solid rgba(252,243,214,.45); box-shadow: none; }
.deck-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.stat {
  background: rgba(252,243,214,.06); border: 1px solid var(--line);
  border-radius: 14px; padding: 10px 14px;
  display: flex; flex-direction: column; gap: 2px;
}
.stat span { font-size: 11.5px; font-weight: 500; letter-spacing: .06em; text-transform: uppercase; color: var(--muted); }
.stat b { font-size: 21px; font-weight: 700; color: var(--cream); }
.stat.accent b { color: var(--accent); }
.deck-note { margin-top: 12px; font-size: 13px; color: var(--muted); min-height: 20px; }

/* ---------- footer ---------- */
#plain-foot {
  max-width: 640px; margin: 0 auto;
  padding: 4svh 32px 10svh;
  text-align: center;
}
#plain-foot p { font-size: 12px; line-height: 1.7; color: rgba(252,243,214,.5); margin-bottom: 10px; }
#plain-foot a { color: rgba(252,243,214,.75); }

/* ---------- mobile ---------- */
@media (max-width: 900px) {
  :root { --rail-w: 0px; }
  #rail { left: 5px; }
  #railDots { display: none; }
  .step-grid {
    grid-template-columns: 1fr;
    gap: 14px; align-content: start;
    padding: calc(var(--topbar-h) + 6px) 18px 16px;
  }
  .copy h2 { font-size: 23px; margin-bottom: 8px; }
  .body p { font-size: 14px; line-height: 1.6; margin-bottom: 8px; }
  .formula { font-size: 12px; padding: 10px 12px; margin-bottom: 10px; }
  .stage { height: 38svh; min-height: 260px; }
  .scene-caption { font-size: 12px; padding: 7px 10px; }
  .sandbox { padding: 8svh 18px; }
  .deck-sliders { grid-template-columns: 1fr; gap: 12px; }
  .deck-stats { grid-template-columns: 1fr 1fr; }
  .stat.accent { grid-column: 1 / -1; }
  .logo img { height: 26px; }
  .mode-btn { font-size: 11px; padding: 8px 10px; }
  #hero h1 { font-size: clamp(38px, 11vw, 64px); }
}
@media (max-width: 480px) {
  .lab-tag { display: none; }
}
@media (max-width: 380px) {
  .mode-btn { font-size: 10px; padding: 8px 7px; }
}