/* ============================================================
   Presenting with Impact — shared styles.
   Palette sampled from the printed cover: navy #1C2C4D,
   amber #DC9B37, white. The waveform is the cover's motif.
   ============================================================ */
:root{
  --navy:#1C2C4D;
  --navy-deep:#142036;
  --amber:#DC9B37;
  --amber-dark:#B87D24;
  --ink:#1F2733;
  --ink-soft:#5A6473;
  --rule:#E3E7EC;
  --paper:#FFFFFF;
  --paper-warm:#F7F8FA;
  --display:'Archivo',system-ui,-apple-system,"Segoe UI",sans-serif;
  --body:'Inter',system-ui,-apple-system,"Segoe UI",sans-serif;
  --wrap:1120px;
  --gut:clamp(20px,5vw,56px);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font-family:var(--body);font-size:1.0625rem;line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:var(--amber-dark)}
.wrap{max-width:var(--wrap);margin:0 auto;padding-inline:var(--gut)}
.skip{position:absolute;left:-9999px;top:0;background:var(--navy);color:#fff;padding:10px 16px;z-index:100}
.skip:focus{left:0}
:focus-visible{outline:2px solid var(--amber);outline-offset:3px}

/* ---------- type ---------- */
h1,h2,h3,h4{font-family:var(--display);color:var(--navy);margin:0;line-height:1.14}
.eyebrow{
  font-family:var(--display);font-size:.7rem;font-weight:700;letter-spacing:.22em;
  text-transform:uppercase;color:var(--ink-soft);margin:0 0 .9rem;
}
.lede{font-size:1.18rem;color:var(--ink-soft)}

/* ---------- header ---------- */
.nav{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.92);backdrop-filter:blur(10px);
     border-bottom:1px solid transparent;transition:border-color .3s,box-shadow .3s}
.nav.is-stuck{border-bottom-color:var(--rule);box-shadow:0 6px 22px rgba(28,44,77,.06)}
.nav__in{display:flex;align-items:center;gap:1.2rem;height:66px}
.brand{display:flex;align-items:center;gap:.6rem;text-decoration:none;margin-right:auto}
.brand svg{width:26px;height:26px;flex:0 0 26px}
.brand b{font-family:var(--display);font-size:.82rem;font-weight:700;letter-spacing:.14em;
         text-transform:uppercase;color:var(--navy)}
.nav__links{display:flex;gap:1.5rem;align-items:center}
.nav__links a{font-family:var(--display);font-size:.76rem;font-weight:600;letter-spacing:.1em;
  text-transform:uppercase;color:var(--ink-soft);text-decoration:none;padding:.3rem 0;
  border-bottom:1px solid transparent;transition:color .2s,border-color .2s}
.nav__links a:hover,.nav__links a:focus-visible{color:var(--navy);border-bottom-color:var(--amber)}
.nav__toggle{display:none;background:none;border:0;padding:.5rem;cursor:pointer}
.nav__toggle span{display:block;width:22px;height:2px;background:var(--navy);margin:4px 0}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5rem;
  font-family:var(--display);font-size:.78rem;font-weight:700;letter-spacing:.09em;
  text-transform:uppercase;text-decoration:none;padding:.95rem 1.5rem;border-radius:4px;
  background:var(--navy);color:#fff;border:1.5px solid var(--navy);cursor:pointer;
  transition:background .2s,color .2s,border-color .2s,transform .2s;
}
.btn:hover,.btn:focus-visible{background:var(--navy-deep);border-color:var(--navy-deep);transform:translateY(-2px)}
.btn--amber{background:var(--amber);border-color:var(--amber);color:#2A1B04}
.btn--amber:hover,.btn--amber:focus-visible{background:var(--amber-dark);border-color:var(--amber-dark);color:#fff}
.btn--ghost{background:transparent;color:var(--navy)}
.btn--ghost:hover,.btn--ghost:focus-visible{background:var(--navy);color:#fff}
.btns{display:flex;flex-wrap:wrap;gap:.7rem;margin-top:1.6rem}
.fmt-note{font-size:.88rem;color:var(--ink-soft);margin:.85rem 0 0}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;padding:clamp(2rem,4svh,3.4rem) 0 clamp(2rem,4svh,3.2rem);
      background:linear-gradient(180deg,#fff 0%,var(--paper-warm) 100%)}
.hero__wave{position:absolute;inset:auto 0 -40px 0;width:100%;opacity:.07;z-index:0;pointer-events:none}
.hero__in{position:relative;z-index:1;display:grid;grid-template-columns:1.15fr .85fr;
          gap:clamp(1.8rem,4vw,3.6rem);align-items:center}
.hero h1{font-size:clamp(2.4rem,min(6.4vw,9svh),4.6rem);font-weight:800;letter-spacing:-.015em}
.hero h1 em{display:block;font-style:normal;color:var(--amber)}
.hero__sub{font-family:var(--display);font-size:clamp(1.05rem,2.2vw,1.35rem);font-weight:500;
           color:var(--navy);margin:.7rem 0 0}
.hero__lede{font-size:clamp(1.02rem,2.6svh,1.16rem);margin:1.1rem 0 0;max-width:34rem;color:var(--ink-soft)}
.hero__by{font-family:var(--display);font-size:.8rem;font-weight:600;letter-spacing:.1em;
          text-transform:uppercase;color:var(--navy);margin:1.3rem 0 0}
.hero__art img{
  width:100%;max-width:min(340px,100%);margin-inline:auto;border-radius:3px;
  box-shadow:0 26px 60px -24px rgba(28,44,77,.45),0 0 0 1px var(--rule);
}

/* ---------- sections ---------- */
.sec{padding:clamp(3.2rem,7vw,5.6rem) 0}
.sec--tint{background:var(--paper-warm);border-block:1px solid var(--rule)}
.sec--navy{background:var(--navy);color:#DDE3EC}
.sec--navy h2,.sec--navy h3{color:#fff}
.sec--navy .eyebrow{color:#93A2B8}
.sec__head{max-width:46rem;margin:0 auto clamp(2rem,4vw,3rem);text-align:center}
.sec__head h2{font-size:clamp(1.7rem,3.6vw,2.5rem);font-weight:800;letter-spacing:-.01em}
.sec__head p{color:var(--ink-soft);margin:.9rem 0 0}
.sec--navy .sec__head p{color:#AEBACC}

/* the cover's line-and-dot divider */
.rule{display:flex;align-items:center;justify-content:center;gap:.5rem;margin:1.1rem 0}
.rule::before,.rule::after{content:"";height:2px;background:var(--amber);flex:0 0 clamp(28px,6vw,64px);border-radius:2px}
.rule i{width:6px;height:6px;border-radius:50%;background:var(--amber);display:block}

/* ---------- premise quote ---------- */
.quote{max-width:48rem;margin:0 auto;text-align:center}
.quote p{font-family:var(--display);font-size:clamp(1.3rem,3vw,1.9rem);font-weight:600;
         line-height:1.3;color:#fff;margin:0}
.quote span{display:block;color:var(--amber)}
.quote .src{font-family:var(--body);font-size:.92rem;font-weight:400;color:#93A2B8;margin-top:1.3rem}

/* ---------- chapter grid ---------- */
.chapters{display:grid;grid-template-columns:repeat(2,1fr);gap:clamp(.9rem,2vw,1.4rem)}
.chapter{background:#fff;border:1px solid var(--rule);border-radius:7px;padding:1.4rem 1.5rem;
         display:flex;gap:1rem;transition:transform .2s,box-shadow .2s,border-color .2s}
.sec--tint .chapter{background:#fff}
.chapter:hover{transform:translateY(-3px);box-shadow:0 18px 36px -24px rgba(28,44,77,.4);border-color:#CBD3DE}
.chapter b{font-family:var(--display);font-size:1.5rem;font-weight:800;color:var(--amber);
           line-height:1;min-width:2.2rem}
.chapter h3{font-size:1.02rem;font-weight:700;margin:.15rem 0 .4rem}
.chapter p{margin:0;font-size:.95rem;color:var(--ink-soft)}

/* ---------- bullet list ---------- */
.ticks{list-style:none;padding:0;margin:0;display:grid;gap:.7rem}
.ticks li{position:relative;padding-left:1.6rem}
.ticks li::before{content:"";position:absolute;left:0;top:.62em;width:8px;height:8px;border-radius:2px;background:var(--amber)}
.two-col{display:grid;grid-template-columns:repeat(2,1fr);gap:.7rem clamp(1.4rem,3vw,2.6rem)}

/* ---------- author ---------- */
.author{display:grid;grid-template-columns:200px 1fr;gap:clamp(1.4rem,3vw,2.6rem);align-items:start;
        max-width:52rem;margin:0 auto}
.author img{border-radius:6px;box-shadow:0 16px 34px -20px rgba(28,44,77,.5)}
.author h3{font-size:1.25rem;font-weight:800;margin-bottom:.2rem}
.author .creds{font-family:var(--display);font-size:.8rem;font-weight:600;letter-spacing:.08em;
               text-transform:uppercase;color:var(--amber-dark);margin:0 0 1rem}
.author p{margin:0 0 .9rem}

/* ---------- also from ---------- */
.also{display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(1rem,2.2vw,1.6rem)}
.also a{display:block;text-decoration:none;color:inherit;background:#fff;border:1px solid var(--rule);
        border-radius:7px;padding:1.3rem 1.4rem;transition:transform .2s,box-shadow .2s,border-color .2s}
.also a:hover{transform:translateY(-3px);box-shadow:0 18px 36px -24px rgba(28,44,77,.4);border-color:#CBD3DE}
.also h3{font-size:1rem;font-weight:700;margin-bottom:.3rem}
.also p{margin:0;font-size:.92rem;color:var(--ink-soft)}
.also span{display:inline-block;margin-top:.7rem;font-family:var(--display);font-size:.72rem;
           font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--amber-dark)}

/* ---------- order ---------- */
.order{text-align:center}
.order .btns{justify-content:center}

/* ---------- footer ---------- */
footer{background:var(--navy-deep);color:#AEBACC;padding:clamp(2.6rem,5vw,4rem) 0 2rem;font-size:.95rem}
footer a{color:#DDE3EC;text-decoration:none}
footer a:hover,footer a:focus-visible{color:var(--amber)}
.network h2{font-family:var(--display);font-size:.72rem;font-weight:700;letter-spacing:.2em;
            text-transform:uppercase;color:var(--amber);margin:0 0 1.1rem}
.network ul{list-style:none;padding:0;margin:0 0 2rem;display:grid;
            grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:.7rem 1.6rem}
.network li{line-height:1.45}
.network span{display:block;font-size:.84rem;color:#7D8CA3}
footer nav{display:flex;flex-wrap:wrap;gap:1.2rem;padding-top:1.4rem;border-top:1px solid rgba(174,186,204,.18)}
.copyright{margin:1.2rem 0 0;font-size:.85rem;color:#7D8CA3}

/* ---------- responsive ---------- */
@media (max-width:900px){
  .hero__in,.author,.also,.chapters,.two-col{grid-template-columns:1fr}
  .hero__art{order:1;max-width:210px;margin-inline:auto}
  .author img{max-width:180px}
  .nav__toggle{display:block}
  .nav__links{position:absolute;top:66px;left:0;right:0;background:#fff;flex-direction:column;
    align-items:flex-start;gap:0;padding:0 var(--gut);max-height:0;overflow:hidden;
    border-bottom:1px solid transparent;transition:max-height .3s ease,padding .3s ease}
  .nav__links.open{max-height:340px;padding:.5rem var(--gut) 1.2rem;border-bottom-color:var(--rule)}
  .nav__links a{width:100%;padding:.7rem 0;font-size:.84rem}
}
@media (max-width:560px){
  .btn{width:100%}
  .btns{flex-direction:column}
}