/* Ivy X. Locke: shared styles. Dark casebook aesthetic. */
:root{
  --bg:#0a0c11; --bg2:#10131a; --panel:#141821; --panel2:#191e29; --line:#272c38;
  --text:#ece4d2; --muted:#b0a898; --dim:#7d776c;
  --gold:#c9a54a; --gold2:#e2c36f; --red:#8e1f1f; --red2:#b02a2a; --ok:#5fa776; --bad:#d0574f;
  --serif:"Libre Caslon Text",Georgia,"Times New Roman",serif;
  --sans:"Karla",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --mono:"Courier Prime","Courier New",ui-monospace,monospace;
  --radius:14px; --wrap:1120px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:var(--sans);font-size:18px;line-height:1.65;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:var(--gold2)}
a:hover{color:#fff}
:focus-visible{outline:2px solid var(--gold2);outline-offset:3px;border-radius:4px}
.skip{position:absolute;left:-999px;top:0;background:var(--gold);color:#111;padding:.5rem 1rem;z-index:100}
.skip:focus{left:1rem;top:1rem}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 22px}
h1,h2,h3{font-family:var(--serif);font-weight:400;line-height:1.2;margin:0 0 .6em;letter-spacing:.005em}
h1{font-size:clamp(2.1rem,5vw,3.5rem)}
h2{font-size:clamp(1.6rem,3.4vw,2.35rem)}
h3{font-size:1.3rem}
p{margin:0 0 1em}
.eyebrow{font-family:var(--mono);font-size:.78rem;letter-spacing:.22em;text-transform:uppercase;color:var(--gold);margin:0 0 .9rem}
.lead{font-size:1.15rem;color:var(--muted);max-width:44rem}
.muted{color:var(--muted)}
.center{text-align:center}
.center .lead{margin-left:auto;margin-right:auto}

/* Header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(10,12,17,.92);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.site-header .wrap{display:flex;align-items:center;justify-content:space-between;height:70px;gap:1rem}
.brand{display:flex;align-items:center;gap:.7rem;text-decoration:none;color:var(--text)}
.brand img{width:42px;height:42px}
.brand span{font-family:var(--serif);font-size:1.15rem;letter-spacing:.04em}
.nav ul{list-style:none;display:flex;gap:.3rem;margin:0;padding:0}
.nav a{display:block;padding:.5rem .8rem;border-radius:8px;color:var(--text);text-decoration:none;font-size:.95rem}
.nav a:hover{background:var(--panel2)}
.nav a[aria-current="page"]{color:var(--gold2);box-shadow:inset 0 -2px 0 var(--gold)}
.nav a.nav-cta{background:var(--red);color:#fff}
.nav a.nav-cta:hover{background:var(--red2)}
.nav-toggle{display:none;background:none;border:1px solid var(--line);color:var(--text);border-radius:8px;padding:.45rem .7rem;font:inherit;font-size:.9rem;cursor:pointer}
@media (max-width:900px){
  .nav-toggle{display:block}
  .nav{position:absolute;top:70px;left:0;right:0;background:var(--bg2);border-bottom:1px solid var(--line);display:none}
  .nav.open{display:block}
  .nav ul{flex-direction:column;padding:.6rem 16px 1rem}
  .nav a{padding:.8rem .9rem;font-size:1.05rem}
}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;padding:.85rem 1.4rem;border-radius:10px;border:1px solid transparent;font:600 1rem var(--sans);text-decoration:none;cursor:pointer;transition:transform .08s,background .15s;min-height:48px}
.btn:active{transform:translateY(1px)}
.btn-gold{background:var(--gold);color:#16120a}
.btn-gold:hover{background:var(--gold2);color:#16120a}
.btn-red{background:var(--red);color:#fff}
.btn-red:hover{background:var(--red2);color:#fff}
.btn-ghost{background:transparent;color:var(--text);border-color:#3a4050}
.btn-ghost:hover{border-color:var(--gold);color:var(--gold2)}
.btn-sm{padding:.55rem .95rem;min-height:40px;font-size:.92rem}
.btn[disabled]{opacity:.45;cursor:not-allowed}
.btn-row{display:flex;flex-wrap:wrap;gap:.8rem}

/* Sections */
.section{padding:84px 0}
.section-alt{background:var(--bg2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-red{background:linear-gradient(180deg,#7d1a1a,#5e1313);}
.section-red .eyebrow{color:#f3d9a0}
.page-head{padding:72px 0 36px;border-bottom:1px solid var(--line);background:radial-gradient(ellipse at 20% 0%,rgba(201,165,74,.10),transparent 60%)}
.grid{display:grid;gap:22px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
@media (max-width:860px){.grid-3,.grid-2{grid-template-columns:1fr}}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:26px}
.card h3{margin-bottom:.45em}
.card p:last-child{margin-bottom:0}
.icon{width:44px;height:44px;border-radius:10px;background:rgba(201,165,74,.12);color:var(--gold);display:grid;place-items:center;margin-bottom:1rem;font-size:1.3rem}

/* Hero */
.hero{position:relative;overflow:hidden;padding:110px 0 96px;border-bottom:1px solid var(--line);
  background:radial-gradient(ellipse at 75% 30%,rgba(142,31,31,.28),transparent 55%),radial-gradient(ellipse at 10% 90%,rgba(201,165,74,.10),transparent 50%),var(--bg)}
.hero::after{content:"";position:absolute;inset:0;background-image:repeating-linear-gradient(0deg,rgba(255,255,255,.018) 0 1px,transparent 1px 34px);pointer-events:none}
.hero .wrap{position:relative;z-index:1;display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center}
.hero h1 em{font-style:italic;color:var(--gold2)}
.hero-covers{position:relative;height:420px}
.hero-covers img{position:absolute;width:58%;border-radius:6px;box-shadow:0 24px 60px rgba(0,0,0,.65);border:1px solid rgba(255,255,255,.06)}
.hero-covers img:nth-child(1){left:0;top:40px;transform:rotate(-7deg)}
.hero-covers img:nth-child(2){right:0;top:0;transform:rotate(6deg)}
.hero-covers img:nth-child(3){left:21%;top:70px;z-index:2}
@media (max-width:860px){.hero{padding:64px 0}.hero .wrap{grid-template-columns:1fr}.hero-covers{height:300px;max-width:380px;margin:0 auto;width:100%}}

/* Teaser */
.teaser{display:grid;grid-template-columns:1fr auto;gap:28px;align-items:center;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:30px;position:relative;overflow:hidden}
.teaser::before{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:var(--gold)}
.cipher-preview{font-family:var(--mono);font-size:clamp(1.2rem,3vw,1.7rem);letter-spacing:.28em;color:var(--gold2);word-break:break-word;margin:.4rem 0 .8rem}
@media (max-width:700px){.teaser{grid-template-columns:1fr}}

/* Books */
.series{margin-bottom:72px}
.series:last-child{margin-bottom:0}
.series-head{display:flex;justify-content:space-between;align-items:end;gap:1rem;border-bottom:1px solid var(--line);padding-bottom:14px;margin-bottom:26px;flex-wrap:wrap}
.series-head h2{margin:0}
.series-head .count{font-family:var(--mono);font-size:.8rem;color:var(--muted);letter-spacing:.12em;text-transform:uppercase}
.books{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:24px}
.book{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;display:flex;flex-direction:column}
.book .cover{background:#07080b;padding:22px 22px 0;display:flex;justify-content:center}
.book .cover img{width:100%;max-width:230px;aspect-ratio:auto;border-radius:4px 4px 0 0;box-shadow:0 14px 34px rgba(0,0,0,.55)}
.book .body{padding:20px 22px 22px;display:flex;flex-direction:column;flex:1}
.book .meta{font-family:var(--mono);font-size:.74rem;letter-spacing:.12em;text-transform:uppercase;color:var(--gold);margin-bottom:.5rem}
.book h3{font-size:1.18rem;margin-bottom:.25em}
.book .sub{font-size:.9rem;color:var(--muted);margin-bottom:.8rem;line-height:1.45}
.book .desc{font-size:.95rem;color:#d8d0bf;line-height:1.55;flex:1}
.book .facts{font-size:.8rem;color:var(--dim);margin:.4rem 0 1rem}
.book .btn{width:100%}
.series-cards{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
@media (max-width:1000px){.series-cards{grid-template-columns:repeat(2,1fr)}}
@media (max-width:560px){.series-cards{grid-template-columns:1fr}}
.series-card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:22px;text-decoration:none;color:var(--text);display:flex;flex-direction:column;transition:border-color .15s,transform .15s}
.series-card:hover{border-color:var(--gold);transform:translateY(-2px);color:var(--text)}
.stack{display:flex;justify-content:center;height:190px;margin-bottom:18px}
.stack img{height:180px;width:auto;border-radius:4px;box-shadow:0 10px 26px rgba(0,0,0,.6);margin-left:-46px;border:1px solid rgba(255,255,255,.05)}
.stack img:first-child{margin-left:0}
.series-card h3{font-size:1.1rem}
.series-card p{font-size:.92rem;color:var(--muted);margin:0}

/* Newsletter / forms */
.signup{display:grid;grid-template-columns:1.1fr 1fr;gap:36px;align-items:center}
@media (max-width:860px){.signup{grid-template-columns:1fr}}
.form-row{display:flex;gap:10px;flex-wrap:wrap}
.field{display:flex;flex-direction:column;gap:6px;margin-bottom:16px;flex:1;min-width:200px}
label{font-size:.9rem;color:var(--muted)}
input,select,textarea{font:inherit;color:var(--text);background:#0c0f15;border:1px solid #333a48;border-radius:10px;padding:.8rem .95rem;min-height:48px;width:100%}
input:focus,select:focus,textarea:focus{border-color:var(--gold);outline:none;box-shadow:0 0 0 3px rgba(201,165,74,.2)}
textarea{min-height:140px;resize:vertical}
.notice{font-size:.88rem;color:var(--muted);margin-top:.6rem}
.todo-badge{display:inline-block;font-family:var(--mono);font-size:.7rem;letter-spacing:.14em;text-transform:uppercase;background:rgba(201,165,74,.14);color:var(--gold2);border:1px dashed rgba(201,165,74,.5);padding:.2rem .5rem;border-radius:6px}
.msg{margin-top:12px;padding:12px 14px;border-radius:10px;font-size:.95rem;display:none}
.msg.show{display:block}
.msg.ok{background:rgba(95,167,118,.12);border:1px solid rgba(95,167,118,.5);color:#cfe9d6}
.msg.bad{background:rgba(208,87,79,.12);border:1px solid rgba(208,87,79,.5);color:#f3cfcb}
.msg.info{background:rgba(201,165,74,.10);border:1px solid rgba(201,165,74,.45);color:#efe0b8}

/* Footer */
.site-footer{border-top:1px solid var(--line);background:#07090d;padding:56px 0 28px;font-size:.95rem}
.footer-grid{display:grid;grid-template-columns:1.2fr 1fr;gap:32px}
@media (max-width:760px){.footer-grid{grid-template-columns:1fr}}
.footer-brand{font-family:var(--serif);font-size:1.3rem;margin-bottom:.3rem}
.footer-brand::before{content:"";display:block;width:34px;height:2px;background:var(--gold);margin-bottom:14px}
.footer-links{list-style:none;padding:0;margin:0;display:flex;flex-wrap:wrap;gap:.4rem 1.1rem}
.footer-links a{color:var(--muted);text-decoration:none}
.footer-links a:hover{color:var(--gold2)}
.disclosure{margin-top:30px;padding-top:20px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:1rem;flex-wrap:wrap;color:var(--dim);font-size:.84rem}
.disclosure .tag{font-family:var(--mono);letter-spacing:.18em;text-transform:uppercase;color:var(--gold)}

/* Checker */
.checker{max-width:640px}
.result-icon{font-size:1.4rem;margin-right:.3rem}
.soon{opacity:.85}
.soon .todo-badge{margin-left:.4rem;vertical-align:middle}

@media (prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}
.sr-only{position:absolute!important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* Newsletter sign-up (private, stored on the site) */
.ivy-hp{position:absolute!important;left:-10000px!important;width:1px;height:1px;overflow:hidden}
.ivy-signup{position:relative}
.ivy-signup .opt{color:var(--dim);font-size:.82rem}
.ivy-signup .consent a{color:var(--gold2)}
.ivy-signup button[disabled]{opacity:.6;cursor:wait}