/* ============================================================
   PSY130 — Lifespan Development companion site
   Theme: "Lifespan Gradient" (dawn teal -> dusk coral)
   Deliberately distinct from the statistics site. No cow.
   ============================================================ */

:root{
  /* Lifespan gradient anchors */
  --teal:#0f8b8d;   /* infancy / early */
  --green:#28a97b;
  --lime:#7fc45a;
  --gold:#f2b134;   /* midlife */
  --amber:#f08a3c;
  --coral:#ef5d6c;  /* late life */
  --plum:#7b4bd6;   /* accent */

  --ink:#20262e;
  --ink-soft:#48525e;
  --line:#e7ded1;
  --cream:#fbf7ef;
  --card:#ffffff;
  --shadow:0 10px 30px -12px rgba(32,38,46,.28);
  --shadow-sm:0 4px 14px -8px rgba(32,38,46,.35);

  --stage:var(--teal); /* overridden per-page */
  --stage-2:var(--green);

  --radius:18px;
  --radius-sm:12px;
  --maxw:1080px;

  --serif:"Fraunces",Georgia,"Times New Roman",serif;
  --sans:"Inter",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--sans);
  color:var(--ink);
  background:var(--cream);
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
.lifebar{height:6px;width:100%;
  background:linear-gradient(90deg,var(--teal),var(--green),var(--lime),var(--gold),var(--amber),var(--coral));
}

/* ---------- Nav ---------- */
.nav{position:sticky;top:0;z-index:50;background:rgba(251,247,239,.86);
  backdrop-filter:blur(10px);border-bottom:1px solid var(--line);}
.nav-inner{max-width:var(--maxw);margin:0 auto;padding:.7rem 1.25rem;
  display:flex;align-items:center;gap:1rem;justify-content:space-between}
.brand{display:flex;align-items:center;gap:.6rem;font-weight:800;letter-spacing:-.01em;
  text-decoration:none;color:var(--ink);font-size:1.05rem}
.brand .dot{width:26px;height:26px;border-radius:50%;
  background:conic-gradient(from 210deg,var(--teal),var(--green),var(--gold),var(--coral),var(--teal));
  box-shadow:inset 0 0 0 3px #fff}
.nav a.link{color:var(--ink-soft);text-decoration:none;font-weight:600;font-size:.92rem;padding:.3rem .1rem}
.nav a.link:hover{color:var(--stage)}
.nav-links{display:flex;gap:1.1rem;align-items:center;flex-wrap:wrap}

/* ---------- Layout ---------- */
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 1.25rem}
.section{padding:3rem 0}
footer.site{border-top:1px solid var(--line);margin-top:3rem;padding:2rem 0;color:var(--ink-soft);font-size:.85rem}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;padding:4.5rem 0 3.5rem;text-align:center}
.hero:before{content:"";position:absolute;inset:0;z-index:-1;opacity:.15;
  background:radial-gradient(60% 80% at 15% 10%,var(--teal),transparent 60%),
             radial-gradient(60% 80% at 85% 20%,var(--coral),transparent 60%),
             radial-gradient(70% 90% at 50% 110%,var(--gold),transparent 55%);}
.eyebrow{text-transform:uppercase;letter-spacing:.18em;font-weight:700;font-size:.78rem;color:var(--stage)}
h1{font-family:var(--serif);font-weight:600;font-size:clamp(2.1rem,5vw,3.6rem);line-height:1.05;
  letter-spacing:-.02em;margin:.6rem 0 .8rem}
.hero p.lead{max-width:640px;margin:0 auto;font-size:1.12rem;color:var(--ink-soft)}
.hero .grad-text{background:linear-gradient(90deg,var(--teal),var(--gold),var(--coral));
  -webkit-background-clip:text;background-clip:text;color:transparent}

/* ---------- Lesson grid (hub) ---------- */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:1.1rem}
.lesson-card{display:block;text-decoration:none;color:inherit;background:var(--card);
  border:1px solid var(--line);border-radius:var(--radius);padding:1.25rem;position:relative;
  box-shadow:var(--shadow-sm);transition:transform .18s ease,box-shadow .18s ease;overflow:hidden}
.lesson-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.lesson-card .accent{position:absolute;top:0;left:0;right:0;height:5px;background:var(--c,var(--teal))}
.lesson-card .num{font-family:var(--serif);font-size:1.6rem;color:var(--c,var(--teal));font-weight:600}
.lesson-card h3{margin:.2rem 0 .35rem;font-size:1.08rem}
.lesson-card p{margin:0;color:var(--ink-soft);font-size:.9rem}
.lesson-card .stage-tag{display:inline-block;margin-top:.7rem;font-size:.72rem;font-weight:700;
  text-transform:uppercase;letter-spacing:.08em;color:var(--c,var(--teal));
  background:color-mix(in srgb,var(--c,var(--teal)) 12%,#fff);padding:.2rem .55rem;border-radius:999px}

/* ---------- Lesson page header ---------- */
.lesson-hero{padding:3.2rem 0 2rem;position:relative;overflow:hidden}
.lesson-hero:before{content:"";position:absolute;inset:0;z-index:-1;opacity:.16;
  background:radial-gradient(70% 100% at 100% 0,var(--stage),transparent 55%),
             radial-gradient(60% 90% at 0 100%,var(--stage-2),transparent 55%)}
.crumb{font-size:.85rem;color:var(--ink-soft);text-decoration:none}
.crumb:hover{color:var(--stage)}
.lesson-hero h1{margin-top:.4rem}
.lesson-hero .lead{font-size:1.1rem;color:var(--ink-soft);max-width:720px}
.pill{display:inline-block;font-size:.72rem;font-weight:700;text-transform:uppercase;letter-spacing:.09em;
  color:#fff;background:var(--stage);padding:.28rem .7rem;border-radius:999px}

/* ---------- Content blocks ---------- */
.lesson-body h2{font-family:var(--serif);font-weight:600;font-size:1.7rem;margin:2.4rem 0 .6rem;
  letter-spacing:-.01em;scroll-margin-top:80px}
.lesson-body h2 .kicker{display:block;font-family:var(--sans);font-size:.75rem;font-weight:700;
  text-transform:uppercase;letter-spacing:.14em;color:var(--stage)}
.lesson-body h3{font-size:1.15rem;margin:1.4rem 0 .4rem}
.lesson-body p{margin:.6rem 0}
.lesson-body a{color:var(--stage);font-weight:600}

.callout{border-left:4px solid var(--stage);background:var(--card);border-radius:0 var(--radius-sm) var(--radius-sm) 0;
  padding:1rem 1.2rem;margin:1.3rem 0;box-shadow:var(--shadow-sm)}
.callout .label{font-size:.72rem;font-weight:800;letter-spacing:.1em;text-transform:uppercase;color:var(--stage)}
.callout.gap{--stage:var(--plum);border-left-color:var(--plum)}
.callout.myth{--stage:var(--coral);border-left-color:var(--coral)}
.callout.update{--stage:var(--amber);border-left-color:var(--amber)}

.two-col{display:grid;grid-template-columns:1fr 1fr;gap:1.1rem}
@media(max-width:720px){.two-col{grid-template-columns:1fr}}

.box{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:1.2rem 1.3rem;box-shadow:var(--shadow-sm)}

/* ---------- Interactive: quiz ---------- */
.widget{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:1.4rem 1.5rem;margin:1.8rem 0}
.widget-head{display:flex;align-items:center;gap:.6rem;margin-bottom:.4rem}
.widget-head .ico{width:34px;height:34px;border-radius:9px;display:grid;place-items:center;color:#fff;
  background:var(--stage);font-size:1.05rem;flex:none}
.widget-head h3{margin:0;font-size:1.15rem}
.widget .sub{color:var(--ink-soft);font-size:.9rem;margin:.1rem 0 1rem}

.quiz-q{margin:1.1rem 0}
.quiz-q .qtext{font-weight:600;margin-bottom:.6rem}
.quiz-q .qtext .n{color:var(--stage);font-weight:800;margin-right:.35rem}
.opt{display:block;width:100%;text-align:left;border:1.5px solid var(--line);background:#fff;
  border-radius:11px;padding:.7rem .9rem;margin:.4rem 0;cursor:pointer;font:inherit;color:inherit;
  transition:border-color .15s,background .15s,transform .05s}
.opt:hover{border-color:var(--stage)}
.opt:active{transform:scale(.995)}
.opt.correct{border-color:var(--green);background:color-mix(in srgb,var(--green) 12%,#fff)}
.opt.wrong{border-color:var(--coral);background:color-mix(in srgb,var(--coral) 12%,#fff)}
.opt.disabled{cursor:default;opacity:.85}
.opt .mark{float:right;font-weight:800}
.explain{font-size:.9rem;color:var(--ink-soft);background:var(--cream);border-radius:9px;
  padding:.6rem .8rem;margin-top:.3rem;display:none;border:1px solid var(--line)}
.explain.show{display:block}
.explain b{color:var(--ink)}
.quiz-score{margin-top:1rem;font-weight:700;display:none}
.quiz-score.show{display:block}
.btn{border:none;border-radius:999px;padding:.6rem 1.2rem;font:inherit;font-weight:700;cursor:pointer;
  background:var(--stage);color:#fff;box-shadow:var(--shadow-sm)}
.btn.ghost{background:transparent;color:var(--stage);border:1.5px solid var(--stage)}
.btn:disabled{opacity:.5;cursor:default}
/* Buttons are anchors inside .lesson-body, which forces link color/underline; restore button styling */
.lesson-body a.btn{color:#fff;text-decoration:none}
.lesson-body a.btn.ghost{color:var(--stage)}

/* ---------- Interactive: match ---------- */
.match{display:grid;grid-template-columns:1fr 1fr;gap:1rem;margin-top:.6rem}
@media(max-width:640px){.match{grid-template-columns:1fr}}
.match-col h4{margin:.2rem 0 .5rem;font-size:.8rem;text-transform:uppercase;letter-spacing:.08em;color:var(--ink-soft)}
.chip{border:1.5px solid var(--line);background:#fff;border-radius:11px;padding:.6rem .8rem;margin:.4rem 0;
  cursor:pointer;font:inherit;text-align:left;width:100%;color:inherit;transition:all .15s}
.chip:hover{border-color:var(--stage)}
.chip.sel{border-color:var(--stage);background:color-mix(in srgb,var(--stage) 12%,#fff);font-weight:600}
.chip.done{border-color:var(--green);background:color-mix(in srgb,var(--green) 14%,#fff);cursor:default}
.chip.done .tag{float:right;font-size:.72rem;color:var(--green);font-weight:800}
.chip.err{animation:shake .4s}
@keyframes shake{0%,100%{transform:translateX(0)}25%{transform:translateX(-6px)}75%{transform:translateX(6px)}}

/* ---------- Interactive: order / rank ---------- */
.order-item{display:flex;align-items:center;gap:.7rem;border:1.5px solid var(--line);background:#fff;
  border-radius:11px;padding:.6rem .8rem;margin:.45rem 0}
.order-item .grip{color:var(--ink-soft);font-weight:800}
.order-item .txt{flex:1}
.order-item .updown{display:flex;flex-direction:column;gap:2px}
.order-item .updown button{border:1px solid var(--line);background:#fff;border-radius:6px;cursor:pointer;
  width:26px;height:20px;line-height:1;font-weight:800;color:var(--stage)}
.order-item.correct{border-color:var(--green);background:color-mix(in srgb,var(--green) 10%,#fff)}
.order-item.incorrect{border-color:var(--coral)}

/* ---------- Interactive: flip cards ---------- */
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:1rem;margin-top:.6rem}
.flip{perspective:1200px;height:200px;cursor:pointer}
.flip-inner{position:relative;width:100%;height:100%;transition:transform .5s;transform-style:preserve-3d}
.flip.open .flip-inner{transform:rotateY(180deg)}
.flip-face{position:absolute;inset:0;backface-visibility:hidden;border-radius:var(--radius);
  padding:1.1rem;display:flex;flex-direction:column;justify-content:center;border:1px solid var(--line);box-shadow:var(--shadow-sm)}
.flip-front{background:var(--card)}
.flip-front .q{font-weight:700;font-size:1.02rem}
.flip-front .hint{margin-top:auto;font-size:.75rem;color:var(--ink-soft)}
.flip-back{background:linear-gradient(160deg,color-mix(in srgb,var(--stage) 16%,#fff),#fff);
  transform:rotateY(180deg);font-size:.92rem;overflow:auto}
.flip-back .rev-label{font-size:.7rem;font-weight:800;text-transform:uppercase;letter-spacing:.08em;color:var(--stage)}

/* ---------- Interactive: reveal timeline ---------- */
.timeline{position:relative;margin:1rem 0 0;padding-left:0}
.tl-item{border:1.5px solid var(--line);background:#fff;border-radius:12px;margin:.5rem 0;overflow:hidden}
.tl-head{display:flex;align-items:center;gap:.8rem;padding:.75rem .9rem;cursor:pointer;font-weight:600}
.tl-head .age{font-family:var(--serif);color:var(--stage);font-weight:700;min-width:74px}
.tl-head .chev{margin-left:auto;transition:transform .2s;color:var(--ink-soft)}
.tl-item.open .chev{transform:rotate(90deg)}
.tl-body{max-height:0;overflow:hidden;transition:max-height .3s ease;color:var(--ink-soft);font-size:.92rem}
.tl-item.open .tl-body{max-height:400px}
.tl-body .pad{padding:0 .9rem .9rem 5.2rem}

/* ---------- Slider / interactive diagram (attachment grid etc) ---------- */
.diagram{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:1.2rem;box-shadow:var(--shadow-sm)}
.quad{display:grid;grid-template-columns:1fr 1fr;gap:.6rem;margin-top:.8rem}
.quad button{border:1.5px solid var(--line);background:#fff;border-radius:12px;padding:1rem;cursor:pointer;
  text-align:left;font:inherit;color:inherit;transition:all .15s}
.quad button:hover{border-color:var(--stage);transform:translateY(-2px)}
.quad button.active{border-color:var(--stage);background:color-mix(in srgb,var(--stage) 12%,#fff)}
.quad button b{display:block;font-size:1rem;margin-bottom:.2rem}
.quad button span{font-size:.82rem;color:var(--ink-soft)}
.diagram .readout{margin-top:.9rem;padding:.9rem 1rem;border-radius:12px;background:var(--cream);border:1px solid var(--line);
  min-height:60px;font-size:.94rem}

/* ---------- Progress dots on lesson ---------- */
.toc{position:sticky;top:64px;font-size:.85rem}
.badge-done{color:var(--green);font-weight:800}

.hidden{display:none!important}
.center{text-align:center}
.muted{color:var(--ink-soft)}
.small{font-size:.85rem}
.mt0{margin-top:0}
hr.soft{border:none;border-top:1px solid var(--line);margin:2rem 0}

/* arc report specifics */
.rep-tag{display:inline-block;font-size:.72rem;font-weight:800;text-transform:uppercase;letter-spacing:.08em;
  padding:.2rem .55rem;border-radius:999px;color:#fff}
.t-gap{background:var(--plum)}
.t-update{background:var(--amber)}
.t-add{background:var(--teal)}
.t-move{background:var(--coral)}
.rep-table{width:100%;border-collapse:collapse;margin:1rem 0;font-size:.92rem}
.rep-table th,.rep-table td{text-align:left;padding:.6rem .7rem;border-bottom:1px solid var(--line);vertical-align:top}
.rep-table th{font-size:.75rem;text-transform:uppercase;letter-spacing:.06em;color:var(--ink-soft)}
.priority{font-weight:800}
.p-high{color:var(--coral)}
.p-med{color:var(--amber)}
.p-low{color:var(--ink-soft)}

/* ============ Text-size adjuster (A− A A+) ============ */
.textsize{display:inline-flex;align-items:center;gap:.28rem;margin-left:.4rem}
.textsize .lbl{font-size:.7rem;color:var(--ink-soft);text-transform:uppercase;letter-spacing:.09em;margin-right:.1rem}
.textsize button{border:1px solid var(--line);background:#fff;color:var(--ink-soft);border-radius:8px;
  font:inherit;font-weight:800;cursor:pointer;line-height:1;padding:.18rem .5rem;transition:border-color .15s,color .15s}
.textsize button:hover{border-color:var(--stage);color:var(--stage)}
.textsize button:active{transform:scale(.96)}
.textsize .a-sm{font-size:.72rem}
.textsize .a-md{font-size:.9rem}
.textsize .a-lg{font-size:1.06rem}
@media(max-width:640px){.textsize .lbl{display:none}}

/* ============ BODHI — the guide (a potted sage plant) ============
   Bodhi is brand-consistent across all of Mike's sites: leaf-matched
   sage green (#4a6b3a text, #6f8e5c leaf), regardless of page theme. */
:root{--bodhi:#4a6b3a;--bodhi-ink:#2f4825;--bodhi-leaf:#6f8e5c;--bodhi-soft:#d8e2cc}
.bodhi-intro{display:flex;gap:1rem;align-items:flex-start;background:var(--card);border:1px solid var(--line);
  border-radius:var(--radius);padding:1.1rem 1.2rem;margin:1.4rem 0;box-shadow:var(--shadow-sm);
  border-left:4px solid var(--bodhi-leaf)}
.bodhi-intro .avatar{flex:none;width:60px;height:60px}
.bodhi-intro .say .who{font-weight:800;color:var(--bodhi);font-size:.8rem;text-transform:uppercase;letter-spacing:.08em}
.bodhi-intro .say p{margin:.2rem 0 0}

/* floating helper */
#bodhi-fab{position:fixed;right:20px;bottom:20px;z-index:60;display:flex;flex-direction:column;align-items:flex-end;gap:.6rem}
#bodhi-fab .bubble{max-width:270px;background:var(--card);border:1px solid var(--line);border-radius:16px 16px 4px 16px;
  padding:.8rem 1rem;box-shadow:var(--shadow);font-size:.9rem;line-height:1.5;opacity:0;transform:translateY(8px) scale(.96);
  transition:all .22s ease;pointer-events:none}
#bodhi-fab.open .bubble{opacity:1;transform:none;pointer-events:auto}
#bodhi-fab .bubble .who{font-weight:800;color:var(--bodhi);font-size:.72rem;text-transform:uppercase;letter-spacing:.09em;display:block;margin-bottom:.2rem}
#bodhi-fab .bubble .more{margin-top:.6rem;display:flex;gap:.5rem}
#bodhi-fab .bubble .more button{border:1px solid var(--line);background:#fff;border-radius:999px;padding:.25rem .7rem;
  font:inherit;font-size:.78rem;font-weight:700;cursor:pointer;color:var(--bodhi)}
#bodhi-fab .bubble .more button:hover{background:var(--bodhi-soft);border-color:var(--bodhi-leaf)}
#bodhi-btn{position:relative;width:64px;height:64px;border-radius:50%;border:2px solid var(--bodhi-soft);cursor:pointer;
  background:#f6f2e9;box-shadow:var(--shadow);display:grid;place-items:center;transition:transform .18s,box-shadow .18s}
#bodhi-btn:hover{transform:translateY(-3px)}
#bodhi-btn svg{width:50px;height:50px}
.bodhi-plant .foliage{transform-origin:50% 66px;animation:sway 5.5s ease-in-out infinite}
@keyframes sway{0%,100%{transform:rotate(-2.5deg)}50%{transform:rotate(2.5deg)}}
#bodhi-fab .pulse{position:absolute;right:4px;top:2px;width:14px;height:14px;border-radius:50%;background:var(--bodhi-leaf);
  border:2px solid #fff;box-shadow:0 0 0 0 color-mix(in srgb,var(--bodhi-leaf) 60%,transparent);animation:pp 2.4s infinite}
@keyframes pp{0%{box-shadow:0 0 0 0 color-mix(in srgb,var(--bodhi-leaf) 55%,transparent)}70%{box-shadow:0 0 0 12px transparent}100%{box-shadow:0 0 0 0 transparent}}
@media(prefers-reduced-motion:reduce){.bodhi-plant .foliage{animation:none}}
@media(max-width:520px){#bodhi-fab .bubble{max-width:210px}}