/* ============================================================
   ARVO — The Connected Platform for Schools
   Design system v2 · styles.css
   Fields: Deep Sea ink & warm paper · Display: Archivo (wide)
   Accent word: Fraunces italic · Body/UI: Poppins
   ============================================================ */

/* ---------- Fonts (self-hosted) ---------- */
@font-face{
  font-family:'Archivo';
  src:url('../fonts/Archivo-var.woff2') format('woff2');
  font-weight:100 900; font-stretch:62% 125%; font-style:normal; font-display:swap;
}
@font-face{
  font-family:'Fraunces';
  src:url('../fonts/Fraunces-Italic-var.woff2') format('woff2');
  font-weight:300 700; font-style:italic; font-display:swap;
}
@font-face{font-family:'Poppins';src:url('../fonts/Poppins-Regular.woff2') format('woff2');font-weight:400;font-style:normal;font-display:swap;}
@font-face{font-family:'Poppins';src:url('../fonts/Poppins-Medium.woff2') format('woff2');font-weight:500;font-style:normal;font-display:swap;}
@font-face{font-family:'Poppins';src:url('../fonts/Poppins-SemiBold.woff2') format('woff2');font-weight:600;font-style:normal;font-display:swap;}
@font-face{font-family:'Poppins';src:url('../fonts/Poppins-Bold.woff2') format('woff2');font-weight:700;font-style:normal;font-display:swap;}

/* ---------- Tokens ---------- */
:root{
  /* Fields & inks */
  --ink:        #003D3E;   /* Deep Sea — primary ink & dark field */
  --abyss:      #01282A;   /* deepest field (hero base, footer) */
  --ink-soft:   rgba(0,61,62,.74);
  --ink-mute:   rgba(0,61,62,.55);
  --paper:      #FAF7ED;   /* Cream paper */
  --sand:       #F1EBDA;   /* alternate light field */
  --peach:      #FFDEB0;   /* soft highlight surface */
  --cream-soft: rgba(250,247,237,.82);
  --cream-mute: rgba(250,247,237,.6);

  /* Brand accents */
  --lagoon:     #007E7F;   /* brand teal — links, accent words on paper */
  --surf:       #00A4A5;   /* bright teal — LMS accent, lines on dark */
  --marigold:   #F8A32C;   /* primary accent — CTAs, accent words on ink */
  --ember:      #F47A20;   /* hover / deep accent */
  --fern:       #57A05F;   /* CMS accent (fills) */
  --fern-ink:   #2F6B3B;   /* CMS accent (text on paper) */

  /* Lines & shadow */
  --line:       rgba(0,61,62,.16);
  --line-dark:  rgba(250,247,237,.18);
  --shadow-pop: 10px 12px 0 0 rgba(0,61,62,.10);
  --shadow-pop-dark: 10px 12px 0 0 rgba(0,0,0,.32);

  /* Type */
  --display:'Archivo',system-ui,sans-serif;
  --serif:'Fraunces',Georgia,serif;
  --body:'Poppins',system-ui,sans-serif;
  --wide:'wdth' 118;
  --fs-hero: clamp(2.7rem, 6.4vw, 5.5rem);
  --fs-h2:   clamp(2.05rem, 4.3vw, 3.55rem);
  --fs-h3:   clamp(1.3rem, 2.3vw, 1.7rem);
  --fs-lead: clamp(1.04rem, 1.45vw, 1.22rem);
  --fs-body: 1.03rem;
  --fs-sm:   .9rem;
  --fs-kick: .74rem;

  /* Rhythm */
  --wrap: 1180px;
  --pad: clamp(20px, 4.5vw, 52px);
  --sec: clamp(78px, 11vw, 148px);
  --r-sm:12px; --r-md:18px; --r-lg:26px; --r-pill:999px;
}

/* ---------- Base ---------- */
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:var(--body); font-size:var(--fs-body); line-height:1.68;
  color:var(--ink); background:var(--paper);
  -webkit-font-smoothing:antialiased; text-rendering:optimizeLegibility;
}
::selection{background:var(--marigold); color:var(--ink)}
img{max-width:100%; display:block; height:auto}
a{color:var(--lagoon); text-decoration:none}
a:hover{color:var(--ink)}
:focus-visible{outline:3px solid var(--surf); outline-offset:3px; border-radius:4px}
.field-ink :focus-visible{outline-color:var(--marigold)}
button{font-family:inherit; cursor:pointer; border:none; background:none; color:inherit}
.wrap{max-width:var(--wrap); margin:0 auto; padding-left:var(--pad); padding-right:var(--pad)}
.skip{position:absolute;left:-999px;top:0;background:var(--marigold);color:var(--ink);padding:.7em 1.2em;z-index:200;border-radius:0 0 12px 0;font-weight:600}
.skip:focus{left:0}

/* ---------- Display type ---------- */
h1,h2,h3,.display{
  font-family:var(--display); font-variation-settings:var(--wide);
  font-weight:740; letter-spacing:-.016em; line-height:1.04;
  text-wrap:balance;
}
h1{font-size:var(--fs-hero); line-height:1.005; letter-spacing:-.022em}
h2{font-size:var(--fs-h2); line-height:1.05}
h3{font-size:var(--fs-h3); line-height:1.18; letter-spacing:-.01em}
.accent{
  font-family:var(--serif); font-style:italic;
  font-variation-settings:'SOFT' 55,'WONK' 0,'opsz' 60;
  font-weight:530; letter-spacing:0; line-height:1;
  color:var(--lagoon);
}
.field-ink .accent, .field-abyss .accent{color:var(--marigold)}
.lead{font-size:var(--fs-lead); line-height:1.62; color:var(--ink-soft); max-width:62ch}
.field-ink .lead, .field-abyss .lead{color:var(--cream-soft)}
p + p{margin-top:1em}
.small{font-size:var(--fs-sm); color:var(--ink-mute)}
.field-ink .small{color:var(--cream-mute)}

/* ---------- Fields ---------- */
.field-paper{background:var(--paper); color:var(--ink)}
.field-sand{background:var(--sand); color:var(--ink)}
.field-peach{background:var(--peach); color:var(--ink)}
.field-ink{background:var(--ink); color:var(--paper)}
.field-abyss{background:linear-gradient(178deg, var(--ink) 0%, var(--abyss) 74%); color:var(--paper)}
section{padding-top:var(--sec); padding-bottom:var(--sec); position:relative}

/* ---------- Kicker / chapter head ---------- */
.kicker{
  display:flex; align-items:center; gap:14px;
  font-family:var(--body); font-size:var(--fs-kick); font-weight:600;
  letter-spacing:.22em; text-transform:uppercase; color:var(--ink-soft);
  margin-bottom:clamp(18px,2.6vw,28px);
}
.field-ink .kicker,.field-abyss .kicker{color:var(--cream-soft)}
.kicker .idx{
  font-family:var(--display); font-variation-settings:var(--wide);
  font-weight:740; font-size:.95rem; letter-spacing:.06em; color:var(--marigold);
}
.kicker .rule{flex:0 0 44px; height:1.5px; background:currentColor; opacity:.5}
.kicker .rule.grow{flex:1}
.chapter-head{margin-bottom:clamp(34px,5vw,60px); max-width:820px}
.chapter-head .lead{margin-top:1.1em}
.center{margin-left:auto;margin-right:auto;text-align:center}
.center .kicker{justify-content:center}
.center .lead{margin-left:auto;margin-right:auto}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex; align-items:center; gap:.55em;
  font-family:var(--body); font-weight:600; font-size:.96rem; line-height:1;
  padding:1.02em 1.7em; border-radius:var(--r-pill);
  border:1.5px solid transparent; transition:transform .18s ease, background .18s ease, color .18s ease, border-color .18s ease;
  white-space:nowrap;
}
.btn svg{width:1em;height:1em;transition:transform .18s ease}
.btn:hover svg{transform:translateX(3px)}
.btn:active{transform:translateY(1px)}
.btn-solid{background:var(--marigold); color:var(--ink); border-color:var(--marigold)}
.btn-solid:hover{background:var(--ember); border-color:var(--ember); color:var(--ink); transform:translateY(-2px)}
.btn-ghost{border-color:var(--line); color:var(--ink); background:transparent}
.btn-ghost:hover{border-color:var(--ink); color:var(--ink); transform:translateY(-2px)}
.field-ink .btn-ghost,.field-abyss .btn-ghost{border-color:var(--line-dark); color:var(--paper)}
.field-ink .btn-ghost:hover,.field-abyss .btn-ghost:hover{border-color:var(--paper); color:var(--paper)}
.btn-cream{background:var(--paper); color:var(--ink); border-color:var(--paper)}
.btn-cream:hover{background:#fff; transform:translateY(-2px); color:var(--ink)}
.btn-row{display:flex; flex-wrap:wrap; gap:14px; align-items:center}
.arrow-link{
  display:inline-flex; align-items:center; gap:.5em; font-weight:600; font-size:.98rem;
  color:var(--lagoon); border-bottom:1.5px solid transparent; padding-bottom:2px;
}
.arrow-link:hover{color:var(--ink); border-color:var(--ink)}
.field-ink .arrow-link{color:var(--marigold)}
.field-ink .arrow-link:hover{color:var(--paper); border-color:var(--paper)}
.arrow-link svg{width:.95em;height:.95em;transition:transform .18s ease}
.arrow-link:hover svg{transform:translateX(3px)}

/* ---------- Product chips ---------- */
.chip{
  display:inline-flex; align-items:center; gap:.6em;
  font-size:.72rem; font-weight:600; letter-spacing:.2em; text-transform:uppercase;
  padding:.55em 1.05em; border:1.5px solid var(--line); border-radius:var(--r-pill);
  color:var(--ink); background:rgba(255,255,255,.5);
}
.field-ink .chip,.field-abyss .chip{border-color:var(--line-dark); color:var(--paper); background:rgba(250,247,237,.06)}
.chip .dot{width:9px;height:9px;border-radius:50%;flex:none}
.dot-books{background:var(--marigold)}
.dot-lms{background:var(--surf)}
.dot-cms{background:var(--fern)}
.dot-powered{background:linear-gradient(135deg,var(--marigold) 0 33%,var(--surf) 33% 66%,var(--fern) 66% 100%)}

/* ---------- Nav ---------- */
.nav{
  position:fixed; inset:0 0 auto 0; z-index:100;
  transition:background .28s ease, box-shadow .28s ease, border-color .28s ease;
  border-bottom:1px solid transparent;
}
.nav .wrap{display:flex; align-items:center; gap:34px; height:76px}
.brand{display:flex; align-items:baseline; font-family:var(--display); font-variation-settings:var(--wide);
  font-weight:800; font-size:1.62rem; letter-spacing:-.02em; color:var(--ink); line-height:1}
.brand em{font-style:normal; color:var(--marigold)}
.nav-links{display:flex; gap:28px; margin-left:auto; align-items:center}
.nav-links a{font-size:.93rem; font-weight:500; color:var(--ink-soft); letter-spacing:.01em}
.nav-links a:hover,.nav-links a[aria-current="page"]{color:var(--ink)}
.nav-links a[aria-current="page"]{font-weight:600; box-shadow:0 2px 0 0 var(--marigold)}
.nav .btn{padding:.78em 1.35em; font-size:.9rem}
.nav-toggle{display:none; margin-left:auto; width:44px;height:44px; border-radius:12px; border:1.5px solid var(--line);
  align-items:center; justify-content:center; color:var(--ink)}
.nav-toggle svg{width:22px;height:22px}
/* over dark hero (top of page) */
.nav[data-tone="dark"]:not(.scrolled){color:var(--paper)}
.nav[data-tone="dark"]:not(.scrolled) .brand{color:var(--paper)}
.nav[data-tone="dark"]:not(.scrolled) .nav-links a{color:var(--cream-soft)}
.nav[data-tone="dark"]:not(.scrolled) .nav-links a:hover,
.nav[data-tone="dark"]:not(.scrolled) .nav-links a[aria-current="page"]{color:var(--paper)}
.nav[data-tone="dark"]:not(.scrolled) .nav-toggle{border-color:var(--line-dark); color:var(--paper)}
.nav.scrolled{background:rgba(250,247,237,.92); backdrop-filter:blur(14px); border-color:var(--line)}
/* mobile sheet */
.nav-sheet{
  position:fixed; inset:0; z-index:99; background:var(--ink); color:var(--paper);
  display:flex; flex-direction:column; padding:110px var(--pad) 40px;
  transform:translateY(-102%); transition:transform .38s cubic-bezier(.7,0,.3,1); overflow:auto;
}
.nav-sheet.open{transform:translateY(0)}
.nav-sheet a{font-family:var(--display); font-variation-settings:var(--wide); font-weight:720;
  font-size:clamp(1.9rem,7vw,2.6rem); color:var(--paper); padding:.42em 0; border-bottom:1px solid var(--line-dark);
  display:flex; justify-content:space-between; align-items:center}
.nav-sheet a .idx{font-family:var(--body); font-size:.8rem; font-weight:600; letter-spacing:.2em; color:var(--marigold)}
.nav-sheet .btn{margin-top:34px; justify-content:center; font-size:1.05rem}
body.sheet-open{overflow:hidden}

/* ---------- Hero (home) ---------- */
.hero{padding-top:clamp(140px,17vh,190px); padding-bottom:0; overflow:hidden}
.hero h1{max-width:19ch}
.hero-grid{display:grid; grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr); gap:clamp(30px,5vw,64px); align-items:center; margin-top:clamp(28px,4vw,44px)}
.hero-grid .lead{max-width:44ch}
.hero h1{margin:0 0 .42em}
.hero-grid .btn-row{margin-top:2em}
.hero-proof{
  margin-top:clamp(40px,6vw,64px); padding:22px 0 26px;
  border-top:1px solid var(--line-dark);
  display:flex; flex-wrap:wrap; gap:10px 38px; align-items:baseline;
}
.hero-proof .stat{display:flex; align-items:baseline; gap:10px}
.hero-proof .n{font-family:var(--display); font-variation-settings:var(--wide); font-weight:740; font-size:1.5rem; letter-spacing:-.01em; color:var(--paper)}
.hero-proof .l{font-size:.8rem; letter-spacing:.14em; text-transform:uppercase; color:var(--cream-mute); font-weight:500}

/* hero diagram */
.diagram{position:relative; min-height:480px}
.diagram svg.thread{position:absolute; inset:0; width:100%; height:100%; overflow:visible; pointer-events:none}
.thread path{fill:none; stroke:var(--surf); stroke-width:2; stroke-dasharray:7 8; opacity:.85}
.thread .draw{stroke-dashoffset:0; animation:threadflow 26s linear infinite}
@keyframes threadflow{to{stroke-dashoffset:-600}}
.node{
  position:absolute; border-radius:var(--r-md);
  border:1.5px solid rgba(250,247,237,.9);
  background:var(--paper); box-shadow:var(--shadow-pop-dark);
  overflow:visible;
}
.node .tag{
  position:absolute; top:-14px; left:16px; z-index:2;
  display:inline-flex; align-items:center; gap:.5em;
  background:var(--ink); border:1.5px solid rgba(250,247,237,.9); border-radius:var(--r-pill);
  color:var(--paper); font-size:.66rem; font-weight:600; letter-spacing:.18em; padding:.5em .95em; text-transform:uppercase;
}
.node .tag .dot{width:7px;height:7px;border-radius:50%}
.node img{border-radius:calc(var(--r-md) - 3px); width:100%; height:100%; object-fit:cover}
.node-books{width:31%; aspect-ratio:634/892; left:0; top:6%; transform:rotate(-4deg); z-index:2}
.node-lms{width:66%; aspect-ratio:1500/844; right:0; top:20%; z-index:3}
.node-cms{width:56%; aspect-ratio:1500/844; left:6%; bottom:4%; transform:rotate(2.2deg); z-index:2}
.node-pulse{position:absolute; width:12px;height:12px;border-radius:50%; background:var(--marigold); z-index:4}
.node-pulse::after{content:""; position:absolute; inset:-7px; border-radius:50%; border:2px solid var(--marigold); opacity:.7; animation:pulse 2.6s ease-out infinite}
@keyframes pulse{0%{transform:scale(.4);opacity:.8}80%,100%{transform:scale(1.9);opacity:0}}
.powered-pill{
  position:absolute; right:2%; bottom:0; z-index:5;
  display:inline-flex; align-items:center; gap:.7em;
  background:var(--marigold); color:var(--ink); border-radius:var(--r-pill);
  font-weight:700; font-size:.74rem; letter-spacing:.16em; text-transform:uppercase;
  padding:.9em 1.35em; box-shadow:0 8px 24px rgba(0,0,0,.28);
}
.powered-pill .dot{width:9px;height:9px;border-radius:50%;background:var(--ink)}

/* partner band inside hero bottom */
.partner-band{border-top:1px solid var(--line-dark); margin-top:clamp(34px,5vw,56px)}
.partner-band .wrap{display:flex; flex-wrap:wrap; align-items:center; gap:14px 44px; padding-top:26px; padding-bottom:30px}
.partner-band .lbl{font-size:.72rem; letter-spacing:.22em; text-transform:uppercase; color:var(--cream-mute); font-weight:600}
.partner{font-family:var(--display); font-variation-settings:var(--wide); font-weight:700; font-size:1.06rem; letter-spacing:.01em; color:var(--cream-soft); white-space:nowrap}
.partner span{font-family:var(--body); font-weight:500; font-size:.72rem; letter-spacing:.14em; text-transform:uppercase; color:var(--cream-mute); display:block; margin-top:2px}

/* ---------- Ledger (six problems) ---------- */
.ledger{border-top:1.5px solid var(--ink); display:grid; grid-template-columns:1fr 1fr; column-gap:clamp(28px,5vw,72px)}
.ledger-row{display:grid; grid-template-columns:56px 1fr; gap:18px; padding:26px 0 24px; border-bottom:1px solid var(--line); align-items:baseline}
.ledger-row .n{font-family:var(--display); font-variation-settings:var(--wide); font-weight:740; font-size:1.35rem; color:var(--marigold)}
.ledger-row h3{font-size:1.16rem; margin-bottom:.35em}
.ledger-row p{font-size:.95rem; color:var(--ink-soft); line-height:1.6}
.root-cause{
  margin-top:clamp(34px,5vw,54px); display:flex; flex-wrap:wrap; align-items:center; gap:20px 30px;
  background:var(--ink); color:var(--paper); border-radius:var(--r-lg); padding:clamp(24px,4vw,40px) clamp(24px,4.5vw,48px);
}
.root-cause p{font-family:var(--display); font-variation-settings:var(--wide); font-weight:700; font-size:clamp(1.15rem,2.2vw,1.6rem); line-height:1.28; letter-spacing:-.01em; flex:1 1 380px}
.root-cause .accent{color:var(--marigold)}

/* ---------- Product spreads ---------- */
.spread{display:grid; grid-template-columns:minmax(0,1fr) minmax(0,1fr); gap:clamp(34px,6vw,84px); align-items:center; padding:clamp(46px,7vw,84px) 0; border-top:1px solid var(--line); position:relative}
.spread:first-of-type{border-top:1.5px solid var(--ink)}
.spread.flip .spread-media{order:-1}
.spread .kicker{margin-bottom:16px}
.spread h3{font-size:clamp(1.7rem,3.2vw,2.5rem); margin-bottom:.45em}
.spread .role{font-family:var(--serif); font-style:italic; font-variation-settings:'SOFT' 55,'opsz' 40; font-weight:520; font-size:clamp(1.12rem,1.9vw,1.4rem); color:var(--lagoon); margin-bottom:.9em; display:block}
.spread p{color:var(--ink-soft); max-width:52ch}
.spec{list-style:none; margin:1.6em 0 2em; border-top:1px solid var(--line)}
.spec li{display:flex; gap:14px; padding:.85em 0; border-bottom:1px solid var(--line); font-size:.96rem; align-items:baseline}
.spec li::before{content:"—"; color:var(--marigold); font-weight:700; flex:none}
.spec b{font-weight:600}

.frame{border:1.5px solid var(--ink); border-radius:var(--r-md); background:#fff; box-shadow:var(--shadow-pop); overflow:hidden}
.frame img{width:100%; object-fit:cover}
.field-ink .frame,.field-abyss .frame{border-color:rgba(250,247,237,.85); box-shadow:var(--shadow-pop-dark)}
.frame-cap{display:flex; justify-content:space-between; gap:14px; font-size:.78rem; letter-spacing:.16em; text-transform:uppercase; font-weight:600; color:var(--ink-mute); padding:12px 4px 0}
.field-ink .frame-cap{color:var(--cream-mute)}

/* covers rail */
.rail{position:relative; overflow:hidden; padding:14px 0 26px; --gap:22px}
.rail-track{display:flex; gap:var(--gap); width:max-content; animation:rail 46s linear infinite}
.rail:hover .rail-track{animation-play-state:paused}
@keyframes rail{to{transform:translateX(calc(-50% - var(--gap)/2))}}
.cover{width:clamp(150px,16vw,208px); flex:none; border-radius:12px; border:1.5px solid var(--ink); box-shadow:6px 8px 0 rgba(0,61,62,.10); transform:rotate(-1.6deg); transition:transform .25s ease; background:#fff}
.cover:nth-child(even){transform:rotate(1.8deg)}
.cover:hover{transform:rotate(0) translateY(-8px)}
.cover img{border-radius:10px}
.rail-fade::before,.rail-fade::after{content:""; position:absolute; top:0; bottom:0; width:70px; z-index:2; pointer-events:none}
.rail-fade::before{left:0; background:linear-gradient(90deg, var(--sand), transparent)}
.rail-fade::after{right:0; background:linear-gradient(-90deg, var(--sand), transparent)}
.field-paper .rail-fade::before{background:linear-gradient(90deg, var(--paper), transparent)}
.field-paper .rail-fade::after{background:linear-gradient(-90deg, var(--paper), transparent)}

/* ---------- Two ways in ---------- */
.ways{display:grid; grid-template-columns:1fr 1fr; gap:clamp(20px,3vw,30px)}
.way{
  border:1.5px solid var(--ink); border-radius:var(--r-lg); background:#fffdf6;
  padding:clamp(26px,4vw,44px); box-shadow:var(--shadow-pop); display:flex; flex-direction:column; gap:0;
  position:relative; overflow:hidden;
}
.way .way-tag{font-size:.7rem; font-weight:700; letter-spacing:.24em; text-transform:uppercase; color:var(--ink-mute); margin-bottom:18px; display:flex; align-items:center; gap:12px}
.way .way-tag::after{content:""; height:1.5px; flex:1; background:var(--line)}
.way h3{font-size:clamp(1.5rem,2.6vw,2.05rem); margin-bottom:.5em}
.way p{color:var(--ink-soft); margin-bottom:1.6em; max-width:46ch}
.way .arrow-link{margin-top:auto}
.way-books{background:linear-gradient(160deg,#fffdf6 55%, #fff3dd)}
.way-lms{background:linear-gradient(160deg,#fffdf6 55%, #e7f4f2)}
.way-note{
  margin-top:clamp(20px,3vw,30px); border:1.5px dashed var(--line); border-radius:var(--r-lg);
  padding:clamp(20px,3vw,30px) clamp(22px,3.6vw,40px);
  display:flex; flex-wrap:wrap; gap:14px 34px; align-items:center; color:var(--ink-soft); font-size:.98rem;
}
.way-note b{color:var(--ink); font-weight:600}
.way-note .arrow-link{margin-left:auto}

/* ---------- Stats ---------- */
.stats{display:grid; grid-template-columns:repeat(4,1fr); gap:clamp(18px,3vw,28px); border-top:1.5px solid var(--line-dark)}
.field-paper .stats,.field-sand .stats{border-color:var(--ink)}
.stat-block{padding-top:22px; border-top:0}
.stat-block .n{font-family:var(--display); font-variation-settings:var(--wide); font-weight:760; font-size:clamp(2.5rem,5vw,4rem); letter-spacing:-.02em; line-height:1; display:flex; align-items:baseline}
.stat-block .n sup{font-size:.45em; color:var(--marigold); font-weight:740; margin-left:2px; transform:translateY(-.35em)}
.stat-block .l{margin-top:10px; font-size:.86rem; color:var(--cream-mute); letter-spacing:.05em; line-height:1.45}
.field-paper .stat-block .l,.field-sand .stat-block .l{color:var(--ink-mute)}

/* ---------- Panels quartet (audiences) ---------- */
.quartet{display:grid; grid-template-columns:repeat(2,1fr); gap:clamp(18px,2.6vw,26px)}
.panel{
  border:1.5px solid var(--ink); border-radius:var(--r-lg); background:#fffdf6;
  padding:clamp(24px,3.4vw,38px); box-shadow:var(--shadow-pop);
  display:flex; flex-direction:column; min-height:230px;
}
.panel .who{font-size:.7rem; font-weight:700; letter-spacing:.24em; text-transform:uppercase; display:flex; align-items:center; gap:10px; margin-bottom:16px; color:var(--ink-mute)}
.panel .who .dot{width:8px;height:8px;border-radius:50%}
.panel h3{font-size:clamp(1.3rem,2.1vw,1.62rem); margin-bottom:.5em}
.panel p{font-size:.96rem; color:var(--ink-soft); max-width:44ch}
.panel .arrow-link{margin-top:auto; padding-top:1.4em; font-size:.92rem}

/* ---------- Quote ---------- */
.quote{max-width:880px}
.quote blockquote{
  font-family:var(--serif); font-style:italic; font-variation-settings:'SOFT' 70,'opsz' 34;
  font-weight:460; font-size:clamp(1.35rem,2.6vw,1.9rem); line-height:1.42; letter-spacing:.002em;
}
.quote blockquote::before{content:"“"; color:var(--marigold); font-size:1.4em; line-height:0; vertical-align:-.24em; margin-right:.08em}
.quote figcaption{margin-top:1.4em; display:flex; align-items:center; gap:14px; font-size:.9rem; color:var(--cream-mute)}
.quote figcaption::before{content:""; width:34px; height:1.5px; background:var(--marigold)}

/* ---------- Equation (ARVO-Powered) ---------- */
.equation{display:flex; flex-wrap:wrap; align-items:stretch; gap:14px; margin:clamp(28px,4vw,44px) 0}
.eq-term{
  flex:1 1 150px; border:1.5px solid var(--ink); border-radius:var(--r-md); background:#fffdf6;
  padding:20px 20px 18px; box-shadow:6px 7px 0 rgba(0,61,62,.09); min-width:150px;
}
.eq-term .t{font-family:var(--display); font-variation-settings:var(--wide); font-weight:740; font-size:1.14rem; display:flex; align-items:center; gap:10px}
.eq-term .t .dot{width:9px;height:9px;border-radius:50%}
.eq-term .d{font-size:.82rem; color:var(--ink-mute); margin-top:6px; line-height:1.45}
.eq-op{align-self:center; font-family:var(--display); font-weight:740; font-size:1.7rem; color:var(--marigold); padding:0 2px}
.eq-result{background:var(--ink); color:var(--paper); border-color:var(--ink)}
.eq-result .d{color:var(--cream-mute)}

/* ---------- Steps / timeline ---------- */
.steps{counter-reset:step; border-top:1.5px solid var(--ink)}
.step{display:grid; grid-template-columns:88px 1fr 200px; gap:clamp(16px,3vw,34px); padding:24px 0; border-bottom:1px solid var(--line); align-items:baseline}
.step::before{counter-increment:step; content:"0" counter(step); font-family:var(--display); font-variation-settings:var(--wide); font-weight:740; font-size:1.5rem; color:var(--marigold)}
.step h3{font-size:1.12rem}
.step p{font-size:.94rem; color:var(--ink-soft); margin-top:.25em}
.step .when{font-size:.76rem; font-weight:600; letter-spacing:.16em; text-transform:uppercase; color:var(--ink-mute); text-align:right}

/* ---------- Module grid (CMS) ---------- */
.modules{display:grid; grid-template-columns:repeat(3,1fr); gap:clamp(16px,2.4vw,24px)}
.module{border:1.5px solid var(--line); border-radius:var(--r-md); padding:24px 24px 20px; background:rgba(255,255,255,.5); transition:border-color .2s ease, transform .2s ease}
.module:hover{border-color:var(--ink); transform:translateY(-3px)}
.module .m-idx{font-family:var(--display); font-variation-settings:var(--wide); font-weight:740; color:var(--fern-ink); font-size:.95rem; letter-spacing:.05em}
.module h3{font-size:1.08rem; margin:.5em 0 .35em}
.module p{font-size:.9rem; color:var(--ink-soft); line-height:1.55}
.module .inc{margin-top:12px; font-size:.76rem; letter-spacing:.06em; color:var(--ink-mute)}

/* ---------- Bundles (plans) ---------- */
.bundles{display:grid; gap:clamp(18px,2.6vw,26px)}
.bundle{
  border:1.5px solid var(--ink); border-radius:var(--r-lg); background:#fffdf6;
  box-shadow:var(--shadow-pop); padding:clamp(26px,4vw,44px);
  display:grid; grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr); gap:clamp(22px,4vw,54px);
}
.bundle.featured{background:var(--ink); color:var(--paper); border-color:var(--ink)}
.bundle .b-head .kicker{margin-bottom:12px}
.bundle h3{font-size:clamp(1.55rem,2.8vw,2.2rem); margin-bottom:.4em}
.bundle .b-sub{font-family:var(--serif); font-style:italic; font-variation-settings:'SOFT' 55,'opsz' 40; font-weight:520; color:var(--lagoon); font-size:1.08rem}
.bundle.featured .b-sub{color:var(--marigold)}
.bundle .b-for{margin-top:1.1em; font-size:.95rem; color:var(--ink-soft); max-width:46ch}
.bundle.featured .b-for{color:var(--cream-soft)}
.bundle .b-cta{margin-top:1.7em}
.bundle .spec{margin:0; border-top-color:var(--line)}
.bundle.featured .spec{border-top:1px solid var(--line-dark)}
.bundle.featured .spec li{border-color:var(--line-dark)}
.bundle .b-note{margin-top:14px; font-size:.8rem; color:var(--ink-mute)}
.bundle.featured .b-note{color:var(--cream-mute)}

/* comparison table */
.compare-scroll{overflow-x:auto; border:1.5px solid var(--ink); border-radius:var(--r-md); background:#fffdf6; box-shadow:var(--shadow-pop)}
table.compare{border-collapse:collapse; width:100%; min-width:940px; font-size:.9rem}
.compare th,.compare td{padding:16px 18px; text-align:left; border-bottom:1px solid var(--line); vertical-align:top}
.compare thead th{font-family:var(--display); font-variation-settings:var(--wide); font-weight:740; font-size:1rem; background:var(--ink); color:var(--paper); position:sticky; top:0}
.compare thead th:first-child{border-radius:0}
.compare tbody th{font-weight:600; font-size:.84rem; color:var(--ink-soft); width:172px; background:rgba(0,61,62,.035)}
.compare td .yes{color:var(--fern-ink); font-weight:600}
.compare td .no{color:var(--ink-mute)}
.compare tr:last-child td,.compare tr:last-child th{border-bottom:none}

/* ---------- CTA band ---------- */
.cta-band{background:var(--marigold); color:var(--ink)}
.cta-band .wrap{display:grid; grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr); gap:clamp(30px,5vw,70px); align-items:center}
.cta-band h2 .accent{color:var(--ink)}
.cta-band .lead{color:rgba(0,61,62,.8)}
.cta-band .btn-solid{background:var(--ink); border-color:var(--ink); color:var(--paper)}
.cta-band .btn-solid:hover{background:var(--abyss); border-color:var(--abyss); color:var(--paper)}
.cta-band .btn-ghost{border-color:rgba(0,61,62,.4); color:var(--ink)}
.cta-band .btn-ghost:hover{border-color:var(--ink)}
.cta-card{
  background:var(--paper); border:1.5px solid var(--ink); border-radius:var(--r-lg);
  box-shadow:10px 12px 0 rgba(0,61,62,.22); padding:clamp(24px,3.4vw,36px); position:relative;
}
.cta-card .mascot{position:absolute; top:-86px; right:22px; width:86px; filter:drop-shadow(0 10px 18px rgba(0,0,0,.18))}
.cta-card h3{font-size:1.3rem; margin-bottom:.3em}
.cta-card .small{margin-bottom:1.2em}
.f-row{display:grid; gap:12px; margin-bottom:12px}
.f-row.cols{grid-template-columns:1fr 1fr}
.f-field label{display:block; font-size:.72rem; font-weight:600; letter-spacing:.14em; text-transform:uppercase; color:var(--ink-mute); margin-bottom:6px}
.f-field input,.f-field select{
  width:100%; font-family:var(--body); font-size:.95rem; color:var(--ink);
  padding:.8em 1em; border:1.5px solid var(--line); border-radius:12px; background:#fff;
}
.f-field input:focus,.f-field select:focus{outline:none; border-color:var(--lagoon); box-shadow:0 0 0 3px rgba(0,164,165,.18)}
.cta-card .btn{width:100%; justify-content:center; margin-top:6px}
.cta-card .alt{margin-top:14px; font-size:.85rem; color:var(--ink-mute); text-align:center}
.cta-card .alt a{font-weight:600}

/* ---------- Footer ---------- */
footer{background:var(--abyss); color:var(--paper); padding:clamp(60px,8vw,92px) 0 34px}
.foot-grid{display:grid; grid-template-columns:minmax(0,1.4fr) repeat(3,minmax(0,.8fr)); gap:clamp(28px,4vw,54px); padding-bottom:clamp(36px,5vw,56px); border-bottom:1px solid var(--line-dark)}
.foot-brand .brand{color:var(--paper); font-size:1.8rem}
.foot-brand p{margin-top:16px; font-size:.92rem; color:var(--cream-mute); max-width:34ch}
.foot-tag{margin-top:20px; font-family:var(--serif); font-style:italic; font-variation-settings:'SOFT' 60,'opsz' 30; color:var(--marigold); font-size:1.05rem}
footer h4{font-size:.72rem; font-weight:600; letter-spacing:.22em; text-transform:uppercase; color:var(--cream-mute); margin-bottom:18px}
footer ul{list-style:none}
footer li{margin-bottom:12px}
footer li a{color:var(--cream-soft); font-size:.94rem}
footer li a:hover{color:var(--paper)}
.foot-meta{display:flex; flex-wrap:wrap; gap:10px 30px; justify-content:space-between; padding-top:26px; font-size:.82rem; color:var(--cream-mute)}
.foot-meta a{color:var(--cream-soft)}
.foot-meta a:hover{color:var(--paper)}

/* ---------- Chapter covers (product pages) ---------- */
.cover-hero{padding-top:clamp(150px,19vh,210px); padding-bottom:clamp(70px,9vw,110px); position:relative; overflow:hidden}
.cover-hero .kicker .rule.grow{opacity:.35}
.cover-hero h1{max-width:11ch}
.cover-hero .lead{margin-top:1.2em; max-width:56ch}
.cover-hero .btn-row{margin-top:2.2em}
.cover-hero .meta{position:absolute; bottom:26px; left:0; right:0}
.cover-hero .meta .wrap{display:flex; justify-content:space-between; gap:20px; font-size:.72rem; letter-spacing:.2em; text-transform:uppercase; color:var(--cream-mute); font-weight:600; border-top:1px solid var(--line-dark); padding-top:18px}
.cover-art{position:absolute; right:max(calc((100vw - var(--wrap))/2 + var(--pad)),var(--pad)); bottom:0; width:min(34vw,430px); opacity:.98; pointer-events:none}
.cover-art img{filter:drop-shadow(0 24px 40px rgba(0,0,0,.35))}

/* pedagogy grid (books) */
.pedagogy{display:grid; grid-template-columns:repeat(3,1fr); gap:clamp(14px,2vw,22px)}
.ped{border:1.5px solid var(--line); border-radius:var(--r-md); padding:20px; background:rgba(255,255,255,.55)}
.ped .p-stage{font-size:.66rem; font-weight:700; letter-spacing:.2em; text-transform:uppercase; color:var(--fern-ink); margin-bottom:8px}
.ped h3{font-size:1.02rem}
.ped p{font-size:.86rem; color:var(--ink-soft); margin-top:.3em; line-height:1.5}

/* friends band */
.friends{display:grid; grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr); gap:clamp(30px,5vw,70px); align-items:center}
.friends .frame{max-width:420px}

/* ---------- Utilities ---------- */
.mt-1{margin-top:14px}.mt-2{margin-top:26px}.mt-3{margin-top:44px}.mt-4{margin-top:clamp(44px,7vw,80px)}
.mb-2{margin-bottom:26px}
.tick{color:var(--fern-ink); font-weight:700}
.divider{height:1.5px; background:var(--ink); border:none; margin:clamp(44px,7vw,80px) 0 0}
.field-ink .divider{background:var(--line-dark)}
html.js .reveal{opacity:0; transform:translateY(16px); transition:opacity .6s ease, transform .6s ease}
html.js .reveal.in{opacity:1; transform:none}
.badge-inline{display:inline-flex; align-items:center; gap:.5em; background:var(--peach); border:1.5px solid var(--ink); color:var(--ink); font-size:.8rem; font-weight:600; border-radius:var(--r-pill); padding:.55em 1.1em}


/* ---------- Friends gallery (LMS students) ---------- */
.gallery5{display:grid; grid-template-columns:repeat(5,1fr); gap:clamp(14px,1.8vw,20px); align-items:stretch}
.friend{border:1.5px solid var(--ink); border-radius:var(--r-lg); padding:18px 18px 20px; display:flex; flex-direction:column; box-shadow:6px 7px 0 rgba(0,61,62,.09); position:relative}
.friend:nth-child(1){background:linear-gradient(170deg,#fffdf6 30%,#ffe9c9)}
.friend:nth-child(2){background:linear-gradient(170deg,#fffdf6 30%,#e0f2ef)}
.friend:nth-child(3){background:linear-gradient(170deg,#fffdf6 30%,#ffe3d1)}
.friend:nth-child(4){background:linear-gradient(170deg,#fffdf6 30%,#e5efdd)}
.friend:nth-child(5){background:linear-gradient(170deg,#fffdf6 30%,#f4e7f3)}
.friend img{width:78%; max-width:170px; margin:0 auto 8px; filter:drop-shadow(0 12px 16px rgba(0,61,62,.18)); transition:transform .25s ease}
.friend:hover img{transform:translateY(-6px) rotate(-1.5deg)}
.friend .f-way{font-size:.66rem; font-weight:700; letter-spacing:.22em; text-transform:uppercase; color:var(--ink-mute)}
.friend h3{font-size:1.06rem; margin:.35em 0 .3em}
.friend p{font-size:.86rem; color:var(--ink-soft); line-height:1.5}
.friend .f-quote{margin-top:auto; padding-top:12px; font-family:var(--serif); font-style:italic; font-variation-settings:'SOFT' 65,'opsz' 24; font-size:.92rem; color:var(--lagoon)}
.friend .f-quote b{font-style:normal; font-family:var(--body); font-weight:600; font-size:.78rem; letter-spacing:.06em; color:var(--ink); display:block; margin-bottom:2px}

/* ---------- Teacher toolkit ---------- */
.toolkit{display:grid; grid-template-columns:repeat(3,1fr); gap:clamp(16px,2.2vw,24px)}
.tool{border:1.5px solid var(--ink); border-radius:var(--r-md); background:#fffdf6; box-shadow:var(--shadow-pop); overflow:hidden; display:flex; flex-direction:column}
.tool .t-media{background:var(--sand); border-bottom:1.5px solid var(--ink); height:190px; display:flex; align-items:center; justify-content:center; padding:16px}
.tool .t-media img{max-height:100%; width:auto; max-width:100%; object-fit:contain; filter:drop-shadow(0 8px 14px rgba(0,61,62,.14))}
.tool .t-body{padding:18px 20px 20px; display:flex; flex-direction:column; flex:1}
.tool .t-name{font-size:.66rem; font-weight:700; letter-spacing:.22em; text-transform:uppercase; color:var(--fern-ink); margin-bottom:8px}
.tool h3{font-size:1.05rem; line-height:1.25}
.tool p{font-size:.86rem; color:var(--ink-soft); margin-top:.4em; line-height:1.5}
.tool-video .t-media{background:var(--ink); position:relative}
.tool-video .t-media .play{width:64px;height:64px;border-radius:50%;background:var(--marigold);display:flex;align-items:center;justify-content:center;box-shadow:0 10px 24px rgba(0,0,0,.3)}
.tool-video .t-media .play svg{width:24px;height:24px;color:var(--ink);margin-left:4px}
.tool-video .t-media::before{content:"A MASTER TEACHER · 04:12"; position:absolute; bottom:12px; left:16px; font-size:.62rem; letter-spacing:.18em; color:var(--cream-mute); font-weight:600}

/* ---------- Courses strip ---------- */
.courses{columns:2; column-gap:clamp(24px,4vw,48px)}
.courses li{break-inside:avoid; display:flex; gap:12px; padding:.72em 0; border-bottom:1px solid var(--line); font-size:.93rem; align-items:baseline}
.courses li::before{content:"✓"; color:var(--fern-ink); font-weight:700; flex:none}
.courses{list-style:none; border-top:1px solid var(--line)}

/* ---------- Floating cutouts ---------- */
.cutout{filter:drop-shadow(0 22px 30px rgba(0,0,0,.35))}
.spread-media .cutout{width:min(100%,440px); margin:0 auto; display:block}
.names-line{font-family:var(--serif); font-style:italic; font-variation-settings:'SOFT' 60,'opsz' 28; color:var(--lagoon); font-size:1.02rem; margin-top:1.1em}


/* ============================================================
   The Stage — five ways to learn, presented by the Friends
   ============================================================ */
.stage-tabs{display:grid; grid-template-columns:repeat(5,1fr); gap:12px; margin-bottom:clamp(24px,3vw,34px)}
.stage-tab{
  --mode:var(--lagoon); --mode-soft:rgba(0,126,127,.1);
  display:flex; align-items:center; gap:12px; text-align:left;
  background:#fffdf6; border:1.5px solid var(--line); border-radius:var(--r-md);
  padding:12px 14px; cursor:pointer; transition:transform .2s ease, border-color .2s ease, box-shadow .2s ease;
}
.stage-tab img{width:44px; height:52px; object-fit:contain; flex:none; filter:drop-shadow(0 4px 6px rgba(0,61,62,.18))}
.stage-tab .st-mode{font-size:.62rem; font-weight:700; letter-spacing:.18em; text-transform:uppercase; color:var(--mode)}
.stage-tab .st-name{font-family:var(--display); font-variation-settings:var(--wide); font-weight:740; font-size:1rem; color:var(--ink); line-height:1.1}
.stage-tab:hover{transform:translateY(-2px); border-color:var(--mode)}
.stage-tab[aria-selected="true"]{border-color:var(--mode); background:var(--mode-soft); box-shadow:0 0 0 4px color-mix(in srgb, var(--mode) 16%, transparent), 6px 7px 0 rgba(0,61,62,.08)}

.stage{
  --mode:var(--lagoon); --mode-soft:rgba(0,126,127,.12);
  border:1.5px solid var(--ink); border-radius:var(--r-lg); background:#fffdf6;
  box-shadow:var(--shadow-pop); overflow:hidden; position:relative;
}
.stage-panel{display:none; grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr); gap:clamp(24px,4vw,56px); padding:clamp(26px,4vw,48px); align-items:center; position:relative}
.stage-panel.active{display:grid}
.stage-cast{position:relative; text-align:center; min-height:340px; display:flex; flex-direction:column; align-items:center; justify-content:flex-end}
.stage-aura{position:absolute; inset:auto auto 8% 50%; transform:translateX(-50%); width:78%; aspect-ratio:1;
  background:radial-gradient(circle, color-mix(in srgb, var(--mode) 22%, transparent) 0%, transparent 68%);
  border-radius:50%; animation:aura 5s ease-in-out infinite; pointer-events:none}
@keyframes aura{0%,100%{transform:translateX(-50%) scale(1);opacity:.8}50%{transform:translateX(-50%) scale(1.06);opacity:1}}
.stage-cast > img{position:relative; z-index:1; width:min(72%,250px); filter:drop-shadow(0 18px 24px rgba(0,61,62,.24)); animation:bob 6s ease-in-out infinite}
@keyframes bob{0%,100%{transform:translateY(0)}50%{transform:translateY(-10px)}}
.deco{position:absolute; border-radius:50%; background:var(--mode); opacity:.35; pointer-events:none}
.deco.spark{background:none; opacity:.6; color:var(--marigold); font-size:18px; line-height:1}
.bubble{
  position:relative; z-index:2; margin-top:14px; max-width:34ch;
  background:#fff; border:1.5px solid var(--ink); border-radius:16px; padding:12px 16px;
  font-size:.92rem; box-shadow:4px 5px 0 rgba(0,61,62,.1);
}
.bubble b{font-weight:700}
.bubble::before{content:""; position:absolute; top:-9px; left:38px; width:14px; height:14px; background:#fff;
  border-left:1.5px solid var(--ink); border-top:1.5px solid var(--ink); transform:rotate(45deg)}
.stage-copy .mode-kick{display:inline-flex; align-items:center; gap:10px; font-size:.66rem; font-weight:700; letter-spacing:.22em; text-transform:uppercase; color:var(--mode); margin-bottom:12px}
.stage-copy .mode-kick .mk-idx{display:inline-flex; width:26px; height:26px; border-radius:50%; background:var(--mode); color:#fff; align-items:center; justify-content:center; font-size:.7rem}
.stage-copy h3{font-size:clamp(1.45rem,2.5vw,2rem); margin-bottom:.45em}
.stage-copy > p{color:var(--ink-soft); font-size:.98rem; max-width:52ch}

/* --- Vignette shells --- */
.vig{margin-top:clamp(18px,2.6vw,26px); border:1.5px solid var(--ink); border-radius:var(--r-md); background:#fff; box-shadow:6px 7px 0 rgba(0,61,62,.1); overflow:hidden}
.vig-bar{display:flex; align-items:center; gap:10px; background:var(--mode); color:#fff; padding:10px 16px;
  font-size:.68rem; font-weight:700; letter-spacing:.18em; text-transform:uppercase}
.vig-bar .right{margin-left:auto; display:flex; align-items:center; gap:8px; letter-spacing:.04em; font-size:.74rem}
.vig-body{padding:18px 18px 20px}

/* Watch — video */
.vid-screen{position:relative; border-radius:12px; overflow:hidden; background:linear-gradient(135deg,#0f4a4a,#003d3e); aspect-ratio:16/9; display:flex; align-items:center; justify-content:center}
.vid-scene{position:absolute; inset:0; display:flex; align-items:flex-end; justify-content:center; gap:6px; padding-bottom:14%}
.vid-sun{position:absolute; top:12%; right:12%; width:14%; aspect-ratio:1; border-radius:50%; background:var(--marigold)}
.vid-tree-trunk{width:6%; height:26%; background:#5a3e1f; border-radius:3px}
.vid-tree-top{position:absolute; bottom:32%; left:50%; transform:translateX(-50%); width:34%; aspect-ratio:1.3; background:#4a8a5a; border-radius:50%}
.vid-tree-top::before,.vid-tree-top::after{content:""; position:absolute; width:60%; aspect-ratio:1.1; background:#5a9e6a; border-radius:50%}
.vid-tree-top::before{left:-16%; top:-12%} .vid-tree-top::after{right:-14%; top:-6%}
.vid-play{position:relative; z-index:2; width:64px; height:64px; border-radius:50%; background:rgba(255,255,255,.95); border:none; cursor:pointer; display:flex; align-items:center; justify-content:center; transition:transform .2s ease}
.vid-play:hover{transform:scale(1.08)}
.vid-play svg{width:26px; height:26px; color:var(--mode); margin-left:3px}
.vig.playing .vid-play .i-play{display:none}
.vig:not(.playing) .vid-play .i-pause{display:none}
.vid-meta{display:flex; align-items:center; gap:12px; margin-top:12px}
.vid-track{flex:1; height:5px; border-radius:3px; background:rgba(0,61,62,.12); overflow:hidden}
.vid-fill{width:0%; height:100%; background:var(--mode); border-radius:3px}
.vig.playing .vid-fill{animation:vidfill 8s linear forwards}
@keyframes vidfill{from{width:0}to{width:100%}}
.vid-time{font-size:.74rem; font-weight:600; color:var(--ink-mute); font-variant-numeric:tabular-nums}

/* Play — pizza game */
.game-q{text-align:center; font-weight:700; font-size:1rem; margin-bottom:14px}
.game-q .frac{color:var(--mode)}
.pizzas{display:flex; justify-content:center; gap:clamp(12px,3vw,26px)}
.pizza{background:none; border:none; cursor:pointer; display:flex; flex-direction:column; align-items:center; gap:8px; padding:6px; border-radius:14px; transition:transform .18s ease}
.pizza:hover{transform:translateY(-4px)}
.pizza .pie{width:clamp(64px,9vw,88px); aspect-ratio:1; border-radius:50%; border:2.5px solid var(--ink);
  background:conic-gradient(var(--marigold) 0 calc(var(--frac)*1turn), #fff4dc 0); position:relative; transition:box-shadow .18s ease}
.pizza .lbl{font-weight:700; font-size:.92rem}
.pizza.right .pie{box-shadow:0 0 0 5px color-mix(in srgb, var(--fern) 45%, transparent); border-color:var(--fern-ink)}
.pizza.wrong{animation:shake .4s ease}
@keyframes shake{0%,100%{transform:translateX(0)}25%{transform:translateX(-6px)}75%{transform:translateX(6px)}}
.game-toast{text-align:center; min-height:1.5em; font-weight:700; font-size:.9rem; color:var(--fern-ink); margin-top:12px}
.coin-pop{display:inline-block; animation:coinpop .7s ease}
@keyframes coinpop{0%{transform:translateY(8px) scale(.6);opacity:0}40%{transform:translateY(-4px) scale(1.15);opacity:1}100%{transform:none;opacity:1}}

/* Practice — question types */
.qgrid{display:grid; grid-template-columns:repeat(5,1fr); gap:8px}
.qtype{border:1.5px solid var(--line); background:#fffdf6; border-radius:10px; padding:10px 6px 8px; text-align:center; cursor:pointer; transition:all .18s ease}
.qtype .qt-n{font-size:.62rem; font-weight:800; letter-spacing:.08em; color:var(--mode)}
.qtype .qt-x{font-size:.66rem; color:var(--ink-mute); margin-top:2px}
.qtype:hover{transform:translateY(-2px); border-color:var(--mode)}
.qtype.done{background:color-mix(in srgb, var(--mode) 12%, #fff); border-color:var(--mode)}
.qpreview{margin-top:12px; border:1.5px dashed var(--line); border-radius:10px; padding:12px 14px; font-size:.86rem; min-height:3.2em; display:flex; align-items:center; gap:10px}
.qpreview b{color:var(--mode)}
.qbar{display:flex; align-items:center; gap:12px; margin-top:12px}
.qbar .vid-track{height:6px}
.qbar .qcount{font-size:.78rem; font-weight:700; color:var(--ink-soft); white-space:nowrap; font-variant-numeric:tabular-nums}

/* Ask — chat */
.chat{display:flex; flex-direction:column; gap:10px; max-height:300px; overflow-y:auto; padding-right:4px}
.msg{max-width:82%; padding:10px 14px; border-radius:14px; font-size:.88rem; line-height:1.5}
.msg.user{align-self:flex-end; background:var(--mode); color:#fff; border-bottom-right-radius:4px}
.msg.bot{align-self:flex-start; background:var(--sand); border:1px solid var(--line); border-bottom-left-radius:4px}
.msg.bot .chip-link{display:inline-flex; align-items:center; gap:6px; margin-top:8px; font-size:.78rem; font-weight:700; color:var(--lagoon); background:#fff; border:1.5px solid var(--line); border-radius:999px; padding:5px 12px; cursor:pointer}
.msg.bot .chip-link:hover{border-color:var(--lagoon)}
.typing{display:inline-flex; gap:4px; padding:12px 16px}
.typing i{width:6px; height:6px; border-radius:50%; background:var(--ink-mute); animation:tdot 1s infinite}
.typing i:nth-child(2){animation-delay:.15s}.typing i:nth-child(3){animation-delay:.3s}
@keyframes tdot{0%,60%,100%{transform:translateY(0);opacity:.5}30%{transform:translateY(-5px);opacity:1}}
.chat-suggest{display:flex; flex-wrap:wrap; gap:8px; margin-top:14px}
.chat-suggest button{font-size:.8rem; font-weight:600; color:var(--ink); background:#fffdf6; border:1.5px solid var(--line); border-radius:999px; padding:8px 14px; cursor:pointer; transition:all .18s ease}
.chat-suggest button:hover:not(:disabled){border-color:var(--mode); color:var(--mode); transform:translateY(-2px)}
.chat-suggest button:disabled{opacity:.4; cursor:default}
.online-dot{width:8px; height:8px; border-radius:50%; background:#4ec77a; box-shadow:0 0 0 3px rgba(78,199,122,.3)}

/* Progress — dashboard */
.prog-row{display:grid; grid-template-columns:82px 1fr 46px; align-items:center; gap:12px; margin-bottom:12px; font-size:.88rem; font-weight:600}
.prog-row .pct{text-align:right; font-weight:800; color:var(--mode); font-variant-numeric:tabular-nums}
.prog-track{height:8px; border-radius:4px; background:rgba(0,61,62,.1); overflow:hidden}
.prog-fill{height:100%; width:0; border-radius:4px; background:var(--mode); transition:width 1.1s cubic-bezier(.2,.7,.2,1)}
.prog-foot{display:flex; align-items:center; flex-wrap:wrap; gap:10px 16px; margin-top:16px; padding-top:14px; border-top:1px solid var(--line)}
.streak{font-weight:700; font-size:.9rem}
.pts{margin-left:auto; background:var(--marigold); color:var(--ink); font-weight:800; font-size:.8rem; border-radius:999px; padding:6px 12px; opacity:0; transform:translateY(6px)}
.stage-panel.active .pts{animation:coinpop .7s .9s ease forwards}
.badges{display:flex; gap:8px}
.badge-m{width:34px; height:34px; border-radius:50%; display:flex; align-items:center; justify-content:center; font-size:15px; border:1.5px solid var(--ink); background:var(--peach)}

/* ============================================================
   Friends selector (Books) & series tabs
   ============================================================ */
.selector{display:grid; grid-template-columns:minmax(0,1fr) minmax(0,.9fr); gap:clamp(26px,4.5vw,60px); align-items:center}
.friend-chips{display:flex; flex-wrap:wrap; gap:10px; margin-bottom:20px}
.fchip{font-family:var(--display); font-variation-settings:var(--wide); font-weight:720; font-size:.95rem; color:var(--ink);
  background:#fffdf6; border:1.5px solid var(--line); border-radius:999px; padding:10px 20px; cursor:pointer; transition:all .18s ease}
.fchip:hover{transform:translateY(-2px); border-color:var(--ink)}
.fchip[aria-selected="true"]{background:var(--ink); color:var(--paper); border-color:var(--ink); box-shadow:4px 5px 0 rgba(0,61,62,.18)}
.fcard{border:1.5px solid var(--ink); border-radius:var(--r-lg); background:#fffdf6; box-shadow:var(--shadow-pop); padding:clamp(22px,3.4vw,34px); display:none}
.fcard.active{display:block; animation:fadeup .35s ease}
@keyframes fadeup{from{opacity:0; transform:translateY(10px)}to{opacity:1; transform:none}}
.fcard .f-head{display:flex; align-items:baseline; gap:14px; margin-bottom:4px}
.fcard h3{font-size:clamp(1.6rem,2.6vw,2.1rem)}
.fcard .f-age{font-family:var(--serif); font-style:italic; font-variation-settings:'SOFT' 55,'opsz' 30; color:var(--lagoon); font-size:1.05rem}
.f-traits{display:flex; flex-wrap:wrap; gap:8px; margin:14px 0 16px}
.f-trait{font-size:.72rem; font-weight:700; letter-spacing:.1em; text-transform:uppercase; background:var(--peach); border:1.5px solid var(--ink); border-radius:999px; padding:5px 12px}
.fcard p{font-size:.95rem; color:var(--ink-soft); line-height:1.65}
.fstage{position:relative; min-height:380px; display:flex; align-items:flex-end; justify-content:center}
.fstage::before{content:""; position:absolute; bottom:6%; left:50%; transform:translateX(-50%); width:82%; aspect-ratio:1;
  background:radial-gradient(circle, rgba(248,163,44,.28) 0%, transparent 66%); border-radius:50%; animation:aura 5s ease-in-out infinite}
.fportrait{position:absolute; bottom:0; width:min(78%,300px); opacity:0; transform:translateY(14px) scale(.98); transition:opacity .35s ease, transform .35s ease; filter:drop-shadow(0 20px 26px rgba(0,61,62,.25)); pointer-events:none}
.fportrait.active{opacity:1; transform:none; animation:bob 6s ease-in-out infinite}

.series-tabs{display:flex; gap:10px; flex-wrap:wrap; margin-bottom:clamp(20px,3vw,30px)}
.stab{display:inline-flex; align-items:baseline; gap:10px; font-family:var(--display); font-variation-settings:var(--wide); font-weight:720; font-size:1rem;
  background:#fffdf6; border:1.5px solid var(--line); border-radius:999px; padding:12px 22px; cursor:pointer; color:var(--ink); transition:all .18s ease}
.stab .cnt{font-family:var(--body); font-weight:700; font-size:.72rem; background:var(--marigold); color:var(--ink); border-radius:999px; padding:2px 9px}
.stab:hover{transform:translateY(-2px); border-color:var(--ink)}
.stab[aria-selected="true"]{background:var(--ink); color:var(--paper); border-color:var(--ink)}
.stab[aria-selected="true"] .cnt{background:var(--marigold)}
.series-panel{display:none}
.series-panel.active{display:grid; animation:fadeup .4s ease; grid-template-columns:repeat(6,1fr); gap:clamp(12px,1.8vw,20px)}
.series-panel .cover{width:auto; transform:rotate(-1.2deg)}
.series-panel .cover:nth-child(even){transform:rotate(1.4deg)}
.series-panel .cover:hover{transform:rotate(0) translateY(-8px)}

/* ============================================================
   Teacher artifact mockups
   ============================================================ */
.tool .t-media{position:relative}
.tool .t-media > .aura-glow{position:absolute; inset:auto; left:50%; top:50%; transform:translate(-50%,-50%); width:70%; aspect-ratio:1.4; background:radial-gradient(circle, rgba(0,164,165,.16), transparent 65%); animation:aura 5s ease-in-out infinite; pointer-events:none}
.art{position:relative; z-index:1; width:100%; font-size:10px}
.art-guide{display:grid; grid-template-columns:1fr 1fr; gap:10px}
.ag-page{background:#fff; border:1px solid var(--line); border-radius:8px; padding:10px 12px; box-shadow:0 2px 5px rgba(0,61,62,.07)}
.ag-tag{font-size:8px; font-weight:800; letter-spacing:.12em; text-transform:uppercase; color:var(--ink-mute); margin-bottom:6px}
.ag-h{font-size:10.5px; font-weight:700; color:var(--ink); margin-bottom:7px; line-height:1.25}
.ag-line{height:4px; background:rgba(0,61,62,.09); border-radius:2px; margin-bottom:4px}
.ag-line.s{width:70%}.ag-line.xs{width:45%}
.ag-call{margin-top:7px; padding:5px 7px; background:rgba(0,164,165,.12); border-left:2px solid var(--surf); border-radius:0 4px 4px 0; font-size:8.5px; font-weight:700; color:var(--lagoon)}
.art-plan{display:flex; flex-direction:column; gap:6px}
.ap-row{display:flex; align-items:center; gap:8px; background:#fff; border:1px solid var(--line); padding:6px 8px; border-radius:8px}
.ap-t{flex:none; width:36px; font-weight:800; color:var(--ember); font-size:9px; text-align:center}
.ap-s{flex:1; font-weight:600; color:var(--ink); font-size:9.5px}
.ap-tag{flex:none; font-size:7.5px; background:rgba(0,164,165,.14); color:var(--lagoon); font-weight:800; letter-spacing:.08em; text-transform:uppercase; padding:3px 7px; border-radius:999px}
.art-bank .ab-row{display:flex; flex-wrap:wrap; gap:5px; margin-bottom:8px}
.ab-pill{font-size:9px; font-weight:700; padding:5px 10px; border-radius:999px; background:rgba(0,61,62,.07); color:var(--ink-soft); border:1px solid transparent; cursor:pointer; transition:all .15s ease}
.ab-pill[aria-pressed="true"]{background:var(--lagoon); color:#fff}
.ab-pill.d-e[aria-pressed="true"]{background:var(--fern-ink)}
.ab-pill.d-m[aria-pressed="true"]{background:var(--ember)}
.ab-pill.d-h[aria-pressed="true"]{background:#b23a3a}
.ab-stat{text-align:center; padding:6px 4px 2px}
.ab-stat b{display:block; font-family:var(--display); font-variation-settings:var(--wide); font-weight:760; font-size:20px; color:var(--ink); font-variant-numeric:tabular-nums}
.ab-stat span{font-size:8.5px; font-weight:700; letter-spacing:.1em; text-transform:uppercase; color:var(--ink-mute)}
.art-sheets{position:relative; height:150px}
.ws{position:absolute; width:66%; background:#fff; border:1px solid var(--line); border-radius:8px; padding:10px; box-shadow:0 3px 8px rgba(0,61,62,.1)}
.ws1{top:0; right:2%; transform:rotate(4deg)} .ws2{top:10%; left:12%; transform:rotate(-3deg)} .ws3{top:30%; left:2%}
.ws-h{font-size:9.5px; font-weight:700; color:var(--ink); margin-bottom:5px}
.ws-q{font-size:8.5px; color:var(--ink-soft); margin-bottom:3px; line-height:1.35}
.ws-q b{color:var(--ember)}
.ws-bl{display:inline-block; width:26px; border-bottom:1px solid var(--ink-mute); margin:0 3px}
.art-cert{background:#fff; border:2px solid var(--peach); border-radius:10px; padding:14px 16px; text-align:center; box-shadow:0 3px 8px rgba(0,61,62,.06)}
.ac-seal{width:34px; height:34px; margin:0 auto 8px; border-radius:50%; background:var(--peach); border:2px solid #fff; box-shadow:0 0 0 1.5px var(--peach); display:flex; align-items:center; justify-content:center; color:var(--ember); font-weight:800}
.ac-tag{font-size:8px; font-weight:800; letter-spacing:.2em; text-transform:uppercase; color:var(--ember); margin-bottom:3px}
.ac-name{font-family:var(--display); font-variation-settings:var(--wide); font-weight:740; font-size:13.5px; color:var(--ink); margin-bottom:4px}
.ac-course{font-size:9px; color:var(--ink-mute); margin-bottom:7px}
.ac-meta{display:inline-flex; gap:6px; font-size:7.5px; font-weight:800; letter-spacing:.08em; text-transform:uppercase; background:rgba(0,164,165,.12); color:var(--lagoon); padding:4px 9px; border-radius:999px}

/* Robot intro */
.robo-intro{display:flex; align-items:flex-end; gap:18px; margin-top:18px}
.robo-intro img{width:76px; animation:wave 3.2s ease-in-out infinite; transform-origin:50% 90%}
@keyframes wave{0%,100%{rotate:0deg}25%{rotate:-4deg}75%{rotate:4deg}}
.robo-intro .bubble{margin-top:0}
.robo-intro .bubble::before{top:auto; bottom:16px; left:-9px; transform:rotate(-45deg)}

/* ---------- Modal ---------- */
.modal{position:fixed; inset:0; z-index:150; display:none; align-items:center; justify-content:center; padding:20px}
.modal.open{display:flex}
.modal-backdrop{position:absolute; inset:0; background:rgba(1,40,42,.66); backdrop-filter:blur(6px)}
.modal-card{position:relative; width:min(560px,100%); max-height:92vh; overflow:auto; background:var(--paper); border:1.5px solid var(--ink); border-radius:var(--r-lg); box-shadow:14px 16px 0 rgba(0,0,0,.3); padding:clamp(26px,4vw,40px)}
.modal-card h3{font-size:1.5rem; margin-bottom:.25em}
.modal-close{position:absolute; top:16px; right:16px; width:40px; height:40px; border-radius:50%; border:1.5px solid var(--line); display:flex; align-items:center; justify-content:center}
.modal-close:hover{border-color:var(--ink)}

/* ---------- Motion & a11y ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important; transition:none!important}
  .reveal{opacity:1; transform:none}
  .rail-track{animation:none}
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width:1060px){
  .gallery5{grid-template-columns:repeat(3,1fr)}
  .stage-tabs{grid-template-columns:repeat(3,1fr)}
  .series-panel.active{grid-template-columns:repeat(3,1fr)}
  .toolkit{grid-template-columns:repeat(2,1fr)}
  .nav-links{display:none}
  .nav-toggle{display:inline-flex}
  .nav .btn{display:none}
  .hero-grid{grid-template-columns:1fr; gap:54px}
  .diagram{min-height:0; height:auto; aspect-ratio:1.06; max-width:620px; margin:0 auto; width:100%}
  .quartet{grid-template-columns:1fr 1fr}
  .modules{grid-template-columns:1fr 1fr}
  .pedagogy{grid-template-columns:1fr 1fr}
  .cover-art{display:none}
}
@media (max-width:820px){
  :root{--sec:clamp(64px,12vw,96px)}
  .stage-panel{grid-template-columns:1fr}
  .stage-cast{min-height:0}
  .stage-cast > img{width:min(52%,190px)}
  .selector{grid-template-columns:1fr}
  .fstage{min-height:300px}
  .stage-tabs{display:flex; overflow-x:auto; scroll-snap-type:x mandatory; padding-bottom:8px}
  .stage-tab{flex:0 0 200px; scroll-snap-align:start}
  .qgrid{grid-template-columns:repeat(3,1fr)}
  .gallery5{display:flex; overflow-x:auto; scroll-snap-type:x mandatory; gap:14px; padding:4px 4px 18px; margin:0 -4px}
  .gallery5 .friend{flex:0 0 236px; scroll-snap-align:start}
  .courses{columns:1}
  .ledger{grid-template-columns:1fr}
  .spread{grid-template-columns:1fr; gap:30px}
  .spread.flip .spread-media{order:0}
  .ways{grid-template-columns:1fr}
  .stats{grid-template-columns:1fr 1fr; row-gap:34px}
  .bundle{grid-template-columns:1fr}
  .cta-band .wrap{grid-template-columns:1fr}
  .cta-card .mascot{display:none}
  .foot-grid{grid-template-columns:1fr 1fr}
  .friends{grid-template-columns:1fr}
  .step{grid-template-columns:56px 1fr}
  .step .when{grid-column:2; text-align:left; margin-top:4px}
  .equation .eq-op{width:100%; text-align:center; padding:0}
}
@media (max-width:560px){
  .toolkit{grid-template-columns:1fr}
  .series-panel.active{grid-template-columns:repeat(2,1fr)}
  .qgrid{grid-template-columns:repeat(2,1fr)}
  .robo-intro{align-items:flex-start}
  .quartet{grid-template-columns:1fr}
  .modules{grid-template-columns:1fr}
  .pedagogy{grid-template-columns:1fr}
  .hero-proof{gap:16px 26px}
  .hero-proof .n{font-size:1.3rem}
  .btn-row .btn{flex:1 1 auto; justify-content:center}
  .f-row.cols{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr}
  .node .tag{left:10px; font-size:.6rem}
  .powered-pill{font-size:.64rem; padding:.8em 1.1em}
}