/* ═══════════════════════════════════════════════
   Evidence Mastery — Shared Stylesheet
   evidencemastery.com/assets/site.css
   ═══════════════════════════════════════════════ */
:root{
  --ink:#0B1120;--ink2:#374151;--ink3:#6B7280;--ink4:#9CA3AF;
  --navy:#0F1D3C;--navy2:#162449;--navy3:#1E3270;
  --teal:#00C9A7;--teal2:#00A88C;--teal3:#E0FAF5;--teal4:#B3F0E8;
  --bg:#FFFFFF;--bg2:#F8FAFC;--bg3:#F1F5F9;
  --border:#E2E8F0;--border2:#CBD5E1;
  --s:#166534;--sbg:#F0FDF4;--sbd:#BBF7D0;
  --w:#92400E;--wbg:#FFFBEB;--wbd:#FDE68A;
  --d:#991B1B;--dbg:#FEF2F2;--dbd:#FECACA;
  --r:8px;--r2:12px;--r3:16px;
  --shadow:0 1px 3px rgba(0,0,0,.06),0 1px 2px rgba(0,0,0,.04);
  --shadow2:0 4px 16px rgba(0,0,0,.08);
  --shadow3:0 8px 40px rgba(0,0,0,.12);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{font-family:'Inter',sans-serif;background:var(--bg);color:var(--ink);font-size:15px;line-height:1.6;-webkit-font-smoothing:antialiased;}

/* NAV */
nav{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.93);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--border);}
.nav-inner{max-width:1160px;margin:0 auto;padding:0 32px;display:flex;align-items:center;height:64px;}
.nav-logo{display:flex;align-items:center;text-decoration:none;flex-shrink:0;}
.nav-logo img{height:36px;display:block;}
.nav-links{display:flex;align-items:center;gap:2px;margin-left:auto;}
.nav-links a{font-size:13.5px;font-weight:500;color:var(--ink3);text-decoration:none;padding:7px 13px;border-radius:6px;transition:all .15s;white-space:nowrap;}
.nav-links a:hover{color:var(--ink);background:var(--bg3);}
.nav-links a.active{color:var(--teal2);background:var(--teal3);}
.nav-cta{display:inline-flex;align-items:center;gap:6px;background:var(--navy);color:#fff !important;font-size:13.5px;font-weight:600;padding:8px 18px;border-radius:7px;text-decoration:none;margin-left:10px;transition:all .2s;}
.nav-cta:hover{background:var(--navy2) !important;}

/* FOOTER */
footer{background:var(--navy);border-top:1px solid rgba(255,255,255,.07);padding:56px 32px 32px;}
.footer-inner{max-width:1160px;margin:0 auto;}
.footer-top{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;padding-bottom:40px;border-bottom:1px solid rgba(255,255,255,.08);}
@media(max-width:900px){.footer-top{grid-template-columns:1fr 1fr;}}
@media(max-width:520px){.footer-top{grid-template-columns:1fr;}}
.footer-brand img{height:34px;display:block;margin-bottom:14px;}
.footer-brand p{font-size:13px;color:rgba(255,255,255,.45);line-height:1.7;max-width:240px;}
.footer-col-title{font-size:12px;font-weight:700;text-transform:uppercase;letter-spacing:.6px;color:rgba(255,255,255,.4);margin-bottom:14px;}
.footer-col a{display:block;font-size:13.5px;color:rgba(255,255,255,.55);text-decoration:none;margin-bottom:9px;transition:color .15s;}
.footer-col a:hover{color:#fff;}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px;padding-top:28px;}
.footer-copy{font-size:12.5px;color:rgba(255,255,255,.3);}
.footer-socials{display:flex;gap:12px;}
.footer-social{width:34px;height:34px;border-radius:8px;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.1);display:flex;align-items:center;justify-content:center;text-decoration:none;color:rgba(255,255,255,.6);font-size:15px;transition:all .15s;}
.footer-social:hover{background:rgba(255,255,255,.14);color:#fff;}

/* UTILITIES */
.section{padding:72px 32px;}
.section-sm{padding:52px 32px;}
.section-inner{max-width:1160px;margin:0 auto;}
.section-label{font-size:12px;font-weight:600;letter-spacing:1px;text-transform:uppercase;color:var(--teal2);margin-bottom:10px;}
.section-title{font-family:'Noto Serif',serif;font-size:34px;font-weight:700;color:var(--ink);letter-spacing:-.6px;margin-bottom:14px;line-height:1.2;}
.section-body{font-size:16px;color:var(--ink2);line-height:1.75;max-width:640px;}
.tag{display:inline-flex;align-items:center;gap:5px;font-size:11px;font-weight:700;letter-spacing:.4px;text-transform:uppercase;padding:4px 11px;border-radius:20px;}
.tag-green{background:var(--sbg);color:var(--s);border:1px solid var(--sbd);}
.tag-gray{background:var(--bg3);color:var(--ink3);border:1px solid var(--border);}
.tag-teal{background:var(--teal3);color:var(--teal2);border:1px solid var(--teal4);}
.tag-navy{background:var(--navy);color:#fff;}
.btn-navy{display:inline-flex;align-items:center;gap:7px;background:var(--navy);color:#fff;font-size:14px;font-weight:600;padding:12px 24px;border-radius:var(--r);text-decoration:none;transition:all .2s;border:none;cursor:pointer;}
.btn-navy:hover{background:var(--navy2);transform:translateY(-1px);box-shadow:0 4px 12px rgba(15,29,60,.25);}
.btn-teal{display:inline-flex;align-items:center;gap:7px;background:var(--teal);color:var(--navy);font-size:14px;font-weight:700;padding:12px 24px;border-radius:var(--r);text-decoration:none;transition:all .2s;border:none;cursor:pointer;}
.btn-teal:hover{background:var(--teal4);transform:translateY(-1px);}
.btn-outline{display:inline-flex;align-items:center;gap:7px;background:var(--bg);color:var(--ink);font-size:14px;font-weight:600;padding:11px 22px;border-radius:var(--r);text-decoration:none;border:1.5px solid var(--border2);transition:all .2s;}
.btn-outline:hover{border-color:var(--ink);background:var(--bg3);}
.divider{height:1px;background:var(--border);}

/* BOOK PAGE SHARED */
.book-hero{padding:60px 32px;position:relative;overflow:hidden;}
.book-hero-inner{max-width:1160px;margin:0 auto;display:grid;grid-template-columns:260px 1fr;gap:60px;align-items:start;}
@media(max-width:800px){.book-hero-inner{grid-template-columns:1fr;}.book-hero-cover{max-width:240px;}}
.book-hero-cover{position:relative;}
.book-hero-cover img{width:100%;border-radius:var(--r2);box-shadow:var(--shadow3);display:block;}
.book-hero-meta{padding-top:8px;}
.book-volume{font-size:12px;font-weight:700;letter-spacing:.8px;text-transform:uppercase;color:var(--teal2);margin-bottom:8px;}
.book-hero-title{font-family:'Noto Serif',serif;font-size:36px;font-weight:700;line-height:1.1;letter-spacing:-.8px;margin-bottom:16px;}
.book-hero-subtitle{font-size:16px;color:var(--ink2);line-height:1.7;margin-bottom:24px;max-width:560px;}
.book-meta-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-bottom:28px;}
@media(max-width:600px){.book-meta-grid{grid-template-columns:1fr 1fr;}}
.book-meta-item{background:var(--bg2);border:1px solid var(--border);border-radius:var(--r);padding:12px 14px;}
.book-meta-label{font-size:10px;font-weight:700;text-transform:uppercase;letter-spacing:.5px;color:var(--ink4);margin-bottom:3px;}
.book-meta-value{font-size:13.5px;font-weight:600;color:var(--ink);}
.book-price-box{background:var(--bg2);border:1px solid var(--border);border-radius:var(--r2);padding:20px 22px;margin-bottom:20px;}
.book-price{font-size:32px;font-weight:800;color:var(--ink);letter-spacing:-1px;}
.book-price-note{font-size:12px;color:var(--ink4);margin-top:3px;}
.book-actions{display:flex;gap:10px;flex-wrap:wrap;}

/* TOC */
.toc-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin-top:24px;}
@media(max-width:700px){.toc-grid{grid-template-columns:1fr;}}
.toc-part{background:var(--bg2);border:1px solid var(--border);border-radius:var(--r2);padding:20px 22px;}
.toc-part-label{font-size:10px;font-weight:700;text-transform:uppercase;letter-spacing:.6px;color:var(--teal2);margin-bottom:6px;}
.toc-part-title{font-family:'Noto Serif',serif;font-size:15px;font-weight:700;color:var(--ink);margin-bottom:12px;}
.toc-chapters{list-style:none;display:flex;flex-direction:column;gap:5px;}
.toc-chapters li{font-size:13px;color:var(--ink2);padding-left:12px;position:relative;line-height:1.4;}
.toc-chapters li::before{content:'';position:absolute;left:0;top:7px;width:5px;height:5px;border-radius:50%;background:var(--teal2);}

/* AUDIENCE */
.audience-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:12px;margin-top:20px;}
.audience-chip{background:var(--bg2);border:1px solid var(--border);border-radius:var(--r);padding:12px 14px;font-size:13px;color:var(--ink2);display:flex;align-items:center;gap:8px;}
.audience-chip::before{content:'';width:7px;height:7px;border-radius:50%;background:var(--teal2);flex-shrink:0;}

/* RELATED BOOKS */
.related-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:24px;}
@media(max-width:900px){.related-grid{grid-template-columns:repeat(2,1fr);}}
@media(max-width:480px){.related-grid{grid-template-columns:1fr 1fr;}}
.related-card{border:1px solid var(--border);border-radius:var(--r2);overflow:hidden;text-decoration:none;transition:all .2s;display:flex;flex-direction:column;}
.related-card:hover{transform:translateY(-3px);box-shadow:var(--shadow2);}
.related-card img{width:100%;aspect-ratio:2/3;object-fit:cover;display:block;}
.related-card-body{padding:12px;flex:1;}
.related-card-vol{font-size:10px;font-weight:700;text-transform:uppercase;letter-spacing:.5px;color:var(--teal2);margin-bottom:3px;}
.related-card-title{font-family:'Noto Serif',serif;font-size:12.5px;font-weight:700;color:var(--ink);line-height:1.3;}
.related-card-status{font-size:11px;color:var(--ink4);margin-top:6px;}

/* WAITLIST */
.waitlist-section{background:linear-gradient(135deg,var(--navy) 0%,var(--navy3) 100%);padding:60px 32px;}
.waitlist-inner{max-width:640px;margin:0 auto;text-align:center;}
.waitlist-title{font-family:'Noto Serif',serif;font-size:28px;font-weight:700;color:#fff;margin-bottom:10px;}
.waitlist-desc{font-size:15px;color:rgba(255,255,255,.6);line-height:1.7;margin-bottom:28px;}
.waitlist-form{display:flex;gap:10px;max-width:440px;margin:0 auto;}
.waitlist-input{flex:1;padding:12px 15px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.2);border-radius:var(--r);font-family:'Inter',sans-serif;font-size:14px;color:#fff;outline:none;}
.waitlist-input::placeholder{color:rgba(255,255,255,.4);}
.waitlist-input:focus{border-color:var(--teal);}
.waitlist-btn{background:var(--teal);color:var(--navy);font-family:'Inter',sans-serif;font-size:14px;font-weight:700;padding:12px 22px;border-radius:var(--r);border:none;cursor:pointer;white-space:nowrap;transition:all .2s;}
.waitlist-btn:hover{background:var(--teal4);}
.waitlist-thanks{display:none;font-size:15px;color:var(--teal);font-weight:600;padding:12px 0;}

@media(max-width:600px){
  .waitlist-form{flex-direction:column;}
  .section{padding:48px 20px;}
  .section-sm{padding:36px 20px;}
  .book-hero{padding:40px 20px;}
  .book-hero-title{font-size:28px;}
  nav .nav-links{display:none;}
  footer{padding:40px 20px 24px;}
}