/* ===================== FONT ===================== */
/* Drop AdigianaToybox-Regular.woff2 / .ttf into /fonts and this activates automatically. */
@font-face {
  font-family: 'Adigiana Toybox';
  src: url('../fonts/AdigianaToybox-Regular.woff2') format('woff2'),
       url('../fonts/AdigianaToybox-Regular.ttf') format('truetype'),
       url('../fonts/AdigianaUI.ttf') format('truetype');
  font-weight: normal;
  font-style: normal;
  font-display: swap;
}

/* ===================== TOKENS ===================== */
:root{
  --blue: #2c6bba;
  --blue-dark: #1e4f8f;
  --blue-darker: #163a69;
  --blue-light: #eaf2fc;
  --blue-lighter: #f5f9fe;
  --ink: #16324f;
  --white: #ffffff;
  --board: #fdfdfb;
  --board-line: rgba(44,107,186,0.08);
  --shadow: 0 20px 45px -20px rgba(22,58,90,0.35);
  --shadow-sm: 0 8px 20px -10px rgba(22,58,90,0.3);
  --radius: 22px;
  --font-display: 'Adigiana Toybox', 'Baloo 2', ui-rounded, 'Segoe UI', cursive, sans-serif;
  --font-body: 'Nunito', 'Segoe UI', system-ui, sans-serif;
}

*{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin:0;
  background: var(--white);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  overflow-x: hidden;
}
img{ max-width:100%; display:block; }
a{ color: inherit; }
ul{ margin:0; padding:0; list-style:none; }
h1,h2,h3{ font-family: var(--font-display); color: var(--blue-darker); margin: 0 0 .5em; line-height: 1.15; font-weight: 700; letter-spacing: .3px; }
h2{ font-size: clamp(1.5rem, 1.1rem + 1.8vw, 2.4rem); }
h3{ font-size: 1.2rem; }
p{ margin: 0 0 1em; }
.wrap{ max-width: 1120px; margin: 0 auto; padding: 0 24px; }
.center{ text-align: center; margin-left:auto; margin-right:auto; }
.kicker{
  font-family: var(--font-display);
  color: var(--blue);
  text-transform: uppercase;
  letter-spacing: 2px;
  font-size: .78rem;
  margin: 0 0 .6em;
}
.lede{ font-size: 1.15rem; color: #3a5875; }
.lede-sm{ font-size: 1.02rem; color: #4a6785; max-width: 640px; }
.section{ padding: 88px 24px; }

/* ===================== BUTTONS ===================== */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:.4em;
  font-family: var(--font-display);
  font-size: .95rem;
  padding: .85em 1.6em;
  border-radius: 999px;
  border: 2px solid transparent;
  cursor: pointer;
  text-decoration: none;
  transition: transform .15s ease, box-shadow .15s ease, background .15s ease;
  user-select: none;
}
.btn:active{ transform: translateY(1px) scale(.98); }
.btn-primary{
  background: var(--blue);
  color: #fff;
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover{ background: var(--blue-dark); box-shadow: 0 14px 26px -10px rgba(44,107,186,0.55); transform: translateY(-2px); }
.btn-secondary{
  background: var(--blue-light);
  color: var(--blue-darker);
  border-color: var(--blue);
}
.btn-secondary:hover{ background: #dcebfd; transform: translateY(-2px); }
.btn-ghost{
  background: transparent;
  color: var(--blue-darker);
  border: 2px dashed var(--blue);
}
.btn-ghost:hover{ background: var(--blue-lighter); }
.btn-ghost:disabled{ opacity:.55; cursor: not-allowed; }
.btn-ghost:disabled:hover{ background: transparent; transform:none; }
.btn-small{ padding: .55em 1.1em; font-size: .82rem; }

/* ===================== HEADER ===================== */
.site-header{
  position: sticky; top:0; z-index: 50;
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--board-line);
}
.header-inner{ display:flex; align-items:center; justify-content:space-between; height: 76px; gap: 16px; }
.brand{ display:flex; align-items:center; gap:.6em; text-decoration:none; }
.brand-ring{
  width: 42px; height:42px; border-radius:50%;
  border: 3px solid var(--blue);
  overflow: hidden; flex-shrink:0;
  box-shadow: 0 0 0 3px #fff, 0 0 0 4px var(--blue-light);
}
.brand-ring img{ width:100%; height:100%; object-fit: cover; }
.brand-ring.small{ width:30px; height:30px; border-width:2px; }
.brand-name{ font-family: var(--font-display); font-size:1.3rem; color: var(--blue-darker); }
.main-nav{ display:flex; gap: 26px; font-weight: 700; font-size:.92rem; }
.main-nav a{ text-decoration:none; color: var(--ink); opacity:.8; position:relative; }
.main-nav a:hover{ opacity:1; color: var(--blue); }
.header-actions{ display:flex; align-items:center; gap:14px; }
.icon-link{ display:flex; color: var(--blue-darker); opacity:.75; }
.icon-link:hover{ opacity:1; color:var(--blue); }
.nav-toggle{ display:none; flex-direction:column; gap:5px; background:none; border:none; cursor:pointer; padding:6px; }
.nav-toggle span{ width:22px; height:2px; background:var(--blue-darker); border-radius:2px; }

/* ===================== HERO ===================== */
.hero{
  display:grid; grid-template-columns: 1.1fr .9fr; gap: 40px; align-items:center;
  padding: 64px 24px 40px;
}
.tape-chip{
  display:inline-block;
  background: var(--blue-light);
  color: var(--blue-darker);
  padding: .4em 1em;
  border-radius: 999px;
  font-family: var(--font-display);
  font-size: .78rem;
  letter-spacing: .5px;
  margin-bottom: 18px;
}
.display{ font-size: clamp(2.4rem, 1.6rem + 4vw, 4.2rem); }
.hero-ctas{ display:flex; gap:14px; flex-wrap:wrap; margin: 26px 0 18px; }
.hero-ctas.center{ justify-content:center; }
.hero-fine{ font-size: .85rem; color:#6b85a0; max-width: 460px; }

.hero-art{ position: relative; display:flex; justify-content:center; }
.tape-frame{
  position: relative;
  width: min(380px, 90%);
  aspect-ratio: 1/1;
  border-radius: 50%;
  overflow: hidden;
  border: 10px solid var(--blue);
  box-shadow: var(--shadow), 0 0 0 10px #fff, 0 0 0 20px var(--blue-light);
  transform: rotate(-2deg);
  transition: transform .4s ease;
}
.tape-frame:hover{ transform: rotate(0deg) scale(1.02); }
.tape-frame img{ width:100%; height:100%; object-fit: cover; }
.tape-strip{
  position:absolute; width:70px; height:26px;
  background: linear-gradient(180deg, rgba(255,255,255,.35), rgba(255,255,255,0) 40%), var(--blue);
  opacity:.85;
  box-shadow: 0 3px 6px rgba(0,0,0,.15);
}
.corner-tl{ top:-8px; left:-18px; transform: rotate(-45deg); }
.corner-br{ bottom:-8px; right:-18px; transform: rotate(-45deg); }
.stamp{
  position:absolute;
  font-family: var(--font-display);
  color: var(--blue);
  border: 3px solid var(--blue);
  border-radius: 10px;
  padding: 6px 10px;
  font-size: .68rem;
  text-transform: uppercase;
  letter-spacing: .5px;
  text-align:center;
  background: rgba(255,255,255,.85);
  opacity: .85;
}
.stamp-1{ top: 4%; right: -4%; transform: rotate(9deg); }
.stamp-2{ bottom: 2%; left: -6%; transform: rotate(-7deg); }

/* ===================== TAPE DIVIDER ===================== */
.tape-divider{
  height: 30px;
  margin: 0 auto;
  max-width: 1120px;
  background: repeating-linear-gradient(115deg, var(--blue) 0 26px, var(--blue-dark) 26px 28px);
  clip-path: polygon(0% 20%, 3% 0%, 97% 30%, 100% 5%, 100% 80%, 97% 100%, 3% 70%, 0% 100%);
  opacity: .9;
}

/* ===================== BOX PANEL (cardboard) ===================== */
.box-panel{
  position: relative;
  background:
    repeating-linear-gradient(180deg, var(--board-line) 0 1px, transparent 1px 14px),
    var(--board);
  border: 2px dashed rgba(44,107,186,0.35);
  border-radius: var(--radius);
  padding: 34px;
  box-shadow: var(--shadow-sm);
}
.corner-tape{
  position:absolute; width:64px; height:24px; background: var(--blue); opacity:.9;
  box-shadow: 0 2px 5px rgba(0,0,0,.15);
}
.corner-tape-left{ top:-10px; left:22px; transform: rotate(-8deg); }
.corner-tape-right{ top:-10px; right:22px; transform: rotate(7deg); }

.abstract-panel{ max-width: 820px; margin: 0 auto; text-align:center; padding: 48px 40px; }
.abstract-panel h2{ font-size: clamp(1.3rem, 1rem + 1.4vw, 1.9rem); }

/* ===================== TIMELINE ===================== */
.timeline{
  display:grid; grid-template-columns: repeat(4,1fr); gap: 18px;
  margin: 40px 0 46px;
}
.timeline-step{ text-align:center; padding: 26px 16px; }
.timeline-step p{ font-size:.88rem; color:#4a6785; margin-bottom: .2em;}
.fail-stamp, .win-stamp{
  display:inline-block; margin-top:10px; font-family: var(--font-display);
  font-size:.7rem; letter-spacing:1px; padding:3px 10px; border-radius:6px;
}
.fail-stamp{ color:#b34747; border:2px solid #b34747; transform: rotate(-4deg); }
.win-stamp{ color: var(--blue); border:2px solid var(--blue); transform: rotate(-4deg); }
.timeline-step.win{ border-color: var(--blue); background:
    repeating-linear-gradient(180deg, var(--board-line) 0 1px, transparent 1px 14px), var(--blue-lighter); }

.lab-grid{ display:grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.stat-row{ display:flex; gap: 22px; margin-top: 18px; flex-wrap:wrap; }
.stat{ display:flex; flex-direction:column; }
.stat strong{ font-family: var(--font-display); color: var(--blue); font-size:1.3rem; }
.stat span{ font-size:.78rem; color:#6b85a0; }
.check-list li{ position:relative; padding-left: 1.6em; margin-bottom:.7em; font-size:.95rem; color:#3a5875; }
.check-list li::before{
  content:""; position:absolute; left:2px; top:.5em;
  width:8px; height:8px; border-radius:50%; background: var(--blue);
}

/* ===================== EXPERIMENT / CANVAS ===================== */
.experiment{ display:grid; grid-template-columns: auto 1fr; gap: 40px; align-items:center; margin-top: 40px; }
.canvas-wrap{ position:relative; width: 380px; max-width:100%; aspect-ratio: 1 / 1; }
#circleCanvas{
  width: 100%;
  height: 100%;
  background: var(--blue-lighter);
  border-radius: 50%;
  border: 3px dashed var(--blue);
  touch-action: none;
  cursor: crosshair;
  display:block;
}
.canvas-hint{
  position:absolute; top:50%; left:50%; transform: translate(-50%,-50%);
  color:#7c9ac0; font-size:.9rem; text-align:center; pointer-events:none; padding: 0 30px;
}
.cat-result{
  position:absolute; inset:0; pointer-events:none;
  display:flex; align-items:center; justify-content:center;
}
.cat-result img{
  width: 66%; height:66%; object-fit:contain; object-position: center center;
  opacity:0; transform: scale(.6) translateY(14px);
  transition: opacity .5s ease, transform .5s cubic-bezier(.34,1.56,.64,1);
  filter: drop-shadow(0 12px 16px rgba(20,45,70,.35));
}
.cat-result img.show{ opacity:1; transform: scale(1) translateY(0); }

.experiment-side{ display:flex; flex-direction:column; gap: 14px; align-items:flex-start; }
.score-box{ display:flex; flex-direction:column; }
.score-label{ font-size:.8rem; text-transform:uppercase; letter-spacing:1px; color:#7c9ac0; }
.score-value{ font-family: var(--font-display); font-size:2.4rem; color: var(--blue); }
.verdict{ color:#3a5875; min-height: 3em; }
.tally{ font-size:.85rem; color:#6b85a0; }

/* ===================== LOOP DIAGRAM ===================== */
.loop-diagram{
  position:relative;
  width: min(520px, 100%);
  aspect-ratio: 1/1;
  margin: 46px auto 40px;
}
.loop-track{
  position:absolute; inset: 8%;
  border-radius:50%;
  border: 3px dashed var(--blue);
}
.loop-node{
  position:absolute; left: var(--x); top: var(--y);
  transform: translate(-50%,-50%);
  display:flex; align-items:center; justify-content:center;
  background:#fff; border:2px solid var(--blue); border-radius: 16px;
  padding: 14px 12px; width: 108px; text-align:center;
  font-size:.72rem; font-weight:800; color: var(--blue-darker);
  box-shadow: var(--shadow-sm);
}
.loop-center{
  position:absolute; inset:0; display:flex; align-items:center; justify-content:center;
  text-align:center; font-family: var(--font-display); color: var(--blue);
  font-size: .95rem; line-height:1.3; padding: 0 22%;
}
.quote-panel{ max-width: 760px; margin: 0 auto; text-align:center; color:#3a5875; font-style:italic; }

/* ===================== CONCLUSION ===================== */
.conclusion-panel{ max-width: 780px; margin:0 auto; text-align:center; padding: 48px 40px; }
.conclusion-panel blockquote{ margin: 0 0 20px; font-size:1.2rem; color: var(--blue-darker); font-family: var(--font-display); line-height:1.5; }
.conclusion-note{ color:#3a5875; }

/* ===================== CHAIN ===================== */
.chain-grid{ display:grid; grid-template-columns: repeat(auto-fit, minmax(180px,1fr)); gap:18px; margin: 40px 0; }
.chain-card{ display:flex; flex-direction:column; gap:8px; text-align:center; }
.chain-label{ font-size:.75rem; text-transform:uppercase; letter-spacing:1px; color:#7c9ac0; }
.chain-value{ font-family: var(--font-display); color: var(--blue-darker); font-size:1.1rem; }
.copy-row{ display:flex; align-items:center; justify-content:center; gap:8px; font-family: var(--font-body); }
.copy-row code{ background: var(--blue-light); padding: 4px 8px; border-radius:6px; font-size:.85rem; }
.copy-row code.truncate{ max-width: 160px; overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }
.copy-btn{
  border:none; background: var(--blue); color:#fff; min-width:26px; height:26px; border-radius:13px;
  cursor:pointer; font-size:.72rem; font-weight:800; flex-shrink:0; padding: 0 8px;
}
.copy-btn:hover{ background: var(--blue-dark); }
.copy-btn.copied{ background:#2c9c5b; padding: 0 10px; }

.sealed-panel{ max-width: 760px; margin: 0 auto; text-align:center; position:relative; overflow:hidden; }
.sealed-tape{
  position:absolute; top:0; left:50%; transform: translateX(-50%);
  width:120%; height:34px; background: var(--blue); opacity:.9;
}
.sealed-text{ color:#3a5875; }
.sealed-actions{ display:flex; gap:14px; justify-content:center; flex-wrap:wrap; margin: 18px 0; }
.sealed-fine{ font-size:.85rem; color:#7c9ac0; margin:0; }
.sealed-fine a{ color: var(--blue); font-weight:700; text-decoration:underline; }

/* ===================== STEPS ===================== */
.steps-grid{ display:grid; grid-template-columns: repeat(4,1fr); gap:20px; margin-top: 40px; }
.step-card{ text-align:left; }
.step-num{ font-family: var(--font-display); color: var(--blue-light); -webkit-text-stroke: 1.5px var(--blue); font-size:2.2rem; display:block; margin-bottom:.1em; }

/* ===================== FAQ ===================== */
.faq-list{ max-width: 760px; margin: 40px auto 0; display:flex; flex-direction:column; gap:14px; }
.faq-item{ padding: 0; overflow:hidden; }
.faq-q{
  width:100%; text-align:left; background:none; border:none; cursor:pointer;
  font-family: var(--font-display); font-size:1rem; color: var(--blue-darker);
  padding: 20px 24px; display:flex; justify-content:space-between; align-items:center;
}
.faq-arrow{ color: var(--blue); transition: transform .25s ease; }
.faq-item.open .faq-arrow{ transform: rotate(45deg); }
.faq-a{ max-height:0; overflow:hidden; transition: max-height .3s ease, padding .3s ease; padding: 0 24px; color:#3a5875; }
.faq-item.open .faq-a{ max-height: 200px; padding: 0 24px 20px; }

/* ===================== FINAL CTA ===================== */
.final-cta{ padding-bottom: 60px; }
.final-panel{ text-align:center; max-width: 820px; margin:0 auto; padding: 56px 40px; }

/* ===================== FOOTER ===================== */
.site-footer{ background: var(--blue-darker); color: #cfe0f5; padding: 46px 0 30px; margin-top: 40px; }
.footer-inner{ display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:20px; margin-bottom: 26px; }
.footer-brand{ display:flex; align-items:center; gap:.6em; font-family: var(--font-display); font-size:1.1rem; color:#fff; }
.footer-links{ display:flex; gap: 22px; font-weight:700; font-size:.9rem; }
.footer-links a{ text-decoration:none; color:#cfe0f5; opacity:.85; }
.footer-links a:hover{ opacity:1; }
.disclaimer{ font-size:.78rem; color:#9fbadd; max-width: 900px; }
.copyright{ font-size:.78rem; color:#7fa0cb; }

/* ===================== MODAL ===================== */
.modal-backdrop{
  position:fixed; inset:0; background: rgba(15,35,60,.55); backdrop-filter: blur(3px);
  display:flex; align-items:center; justify-content:center; padding:24px; z-index:100;
  opacity:0; pointer-events:none; transition: opacity .2s ease;
}
.modal-backdrop.active{ opacity:1; pointer-events:auto; }
.modal-box{ max-width: 460px; text-align:center; transform: scale(.92); transition: transform .2s ease; background: #fff; }
.modal-backdrop.active .modal-box{ transform: scale(1); }
.modal-close{ position:absolute; top:14px; right:16px; border:none; background:none; font-size:1.1rem; cursor:pointer; color: var(--blue-darker); }

/* ===================== PAW CONFETTI ===================== */
.paw{
  position:fixed; pointer-events:none; z-index: 200;
  width: 16px; height: 7px; background: var(--blue); border-radius: 2px;
  box-shadow: 0 2px 4px rgba(0,0,0,.15);
  animation: pawFall 1.1s ease-out forwards;
}
@keyframes pawFall{
  0%{ transform: translateY(0) rotate(0deg); opacity:1; }
  100%{ transform: translateY(160px) rotate(200deg); opacity:0; }
}

/* ===================== RESPONSIVE ===================== */
@media (max-width: 900px){
  .main-nav{ display:none; }
  .nav-toggle{ display:flex; }
  .hero{ grid-template-columns: 1fr; text-align:center; padding-top: 40px; }
  .hero-ctas, .hero-fine{ margin-left:auto; margin-right:auto; }
  .hero-art{ order:-1; }
  .lede-sm{ margin-left:auto; margin-right:auto; }
  .timeline{ grid-template-columns: 1fr 1fr; }
  .lab-grid{ grid-template-columns: 1fr; }
  .chain-grid{ grid-template-columns: 1fr 1fr; }
  .steps-grid{ grid-template-columns: 1fr 1fr; }
  .experiment{ grid-template-columns: 1fr; justify-items:center; text-align:center; }
  .experiment-side{ align-items:center; }
  .loop-node{ width: 84px; font-size:.62rem; padding: 8px; }
  .loop-center{ padding: 0 26%; font-size:.8rem; }
  .main-nav.mobile-open{
    display:flex; position:absolute; top:76px; left:0; right:0; background:#fff;
    flex-direction:column; padding: 20px 24px; gap:16px; box-shadow: var(--shadow-sm);
    border-bottom: 1px solid var(--board-line); z-index: 40;
  }
}
@media (max-width: 560px){
  .timeline{ grid-template-columns: 1fr; }
  .chain-grid{ grid-template-columns: 1fr; }
  .steps-grid{ grid-template-columns: 1fr; }
  .box-panel{ padding: 24px 18px; }
  .canvas-wrap{ width: 280px; }
  .score-value{ font-size: 2rem; }
}