/* UsedBook.com design system — warm paper / library green / binding orange */
:root{
  --bg:#FBF8F3;--surface:#FFFFFF;--surface-2:#F3EEE5;--surface-3:#EAE3D6;
  --ink:#1E1B16;--ink-2:#3A352D;--muted:#6B6358;--line:#E6DFD3;
  --brand:#1F5F4F;--brand-2:#174A3D;--brand-ink:#FBF8F3;--brand-soft:#E3EFEA;
  --accent:#C2541B;--accent-2:#A64512;--accent-ink:#FFFFFF;--accent-soft:#FBE9DE;
  --gold:#B8862B;--ok:#2F7D4F;--warn:#9A5B00;--danger:#B42318;
  --radius:14px;--radius-sm:10px;--radius-lg:22px;
  --shadow:0 1px 2px rgba(30,27,22,.06),0 6px 20px rgba(30,27,22,.07);
  --shadow-lg:0 10px 40px rgba(30,27,22,.16);
  --font:"Inter",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  --serif:"Fraunces",Georgia,"Times New Roman",serif;
  --wrap:1180px;
}
[data-theme="dark"]{
  --bg:#14130F;--surface:#1C1A16;--surface-2:#24211C;--surface-3:#2D2A23;
  --ink:#F2EDE4;--ink-2:#DDD5C8;--muted:#B3AA9C;--line:#36322B;
  --brand:#5FB59A;--brand-2:#7CC7AE;--brand-ink:#0E1512;--brand-soft:#1E2E28;
  --accent:#F08A4B;--accent-2:#F4A372;--accent-ink:#1A0E06;--accent-soft:#3A2516;
  --shadow:0 1px 2px rgba(0,0,0,.4),0 6px 20px rgba(0,0,0,.35);--shadow-lg:0 10px 40px rgba(0,0,0,.55);
}
*,*::before,*::after{box-sizing:border-box}
[hidden]{display:none!important}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:90px}
body{margin:0;background:var(--bg);color:var(--ink);font:400 16.5px/1.65 var(--font);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
img,svg{max-width:100%;height:auto}
a{color:var(--brand);text-underline-offset:3px;text-decoration-thickness:1px}
a:hover{color:var(--accent)}
h1,h2,h3,h4{font-family:var(--serif);font-weight:700;line-height:1.18;color:var(--ink);margin:0 0 .5em;letter-spacing:-.01em}
h1{font-size:clamp(2rem,4.4vw,3.35rem)}
h2{font-size:clamp(1.5rem,2.8vw,2.15rem)}
h3{font-size:1.2rem}
p{margin:0 0 1em}
ul,ol{padding-left:1.25em}
:focus-visible{outline:3px solid var(--accent);outline-offset:2px;border-radius:6px}
.skip{position:absolute;left:-999px;top:8px;z-index:200;background:var(--ink);color:var(--bg);padding:10px 14px;border-radius:8px}
.skip:focus{left:8px}
.sr-only{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);border:0}
.hp{position:absolute!important;left:-5000px!important;width:1px;height:1px;opacity:0}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 20px}
.narrow{max-width:800px}
.center{text-align:center}
.muted{color:var(--muted)}
.fine{font-size:.82rem;color:var(--muted);margin:.6em 0 0}
.eyebrow{font:600 .78rem/1.2 var(--font);letter-spacing:.12em;text-transform:uppercase;color:var(--accent);margin:0 0 .7em}
.lede{font-size:1.16rem;color:var(--ink-2);max-width:62ch}
.center .lede{margin-left:auto;margin-right:auto}

/* Top bar */
.topbar{background:var(--ink);color:var(--bg);font-size:.84rem;text-align:center;padding:7px 0}
.topbar a{color:var(--bg);text-decoration:none;font-weight:500}
.topbar a:hover{color:var(--accent-soft);text-decoration:underline}
[data-theme="dark"] .topbar{background:#0B0A08;color:var(--ink)}
[data-theme="dark"] .topbar a{color:var(--ink)}

/* Header */
.site-header{position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:saturate(1.4) blur(10px);-webkit-backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid var(--line)}
.header-in{display:flex;align-items:center;gap:18px;min-height:66px}
.logo{display:inline-flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);flex-shrink:0}
.logo-text{font:500 1.32rem/1 var(--serif);letter-spacing:-.01em}
.logo-text b{color:var(--brand);font-weight:700}
.logo-text small{font:500 .78rem var(--font);color:var(--muted);margin-left:1px}
.nav{margin-left:auto}
.nav-list{list-style:none;display:flex;align-items:center;gap:2px;margin:0;padding:0}
.nav-list>li{position:relative}
.nav-list a,.sub-toggle{display:block;padding:9px 11px;border-radius:9px;color:var(--ink-2);text-decoration:none;font:500 .95rem var(--font);background:none;border:0;cursor:pointer}
.nav-list a:hover,.sub-toggle:hover,.nav-list a[aria-current="page"]{background:var(--surface-2);color:var(--ink)}
.sub-toggle::after{content:"";display:inline-block;margin-left:6px;border:4px solid transparent;border-top-color:currentColor;transform:translateY(2px)}
.sub{list-style:none;position:absolute;top:calc(100% + 6px);left:0;min-width:240px;margin:0;padding:8px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-lg);display:none}
.has-sub.open>.sub{display:block}
@media(hover:hover) and (min-width:1181px){.has-sub:hover>.sub,.has-sub:focus-within>.sub{display:block}}
.sub a{padding:9px 12px;font-size:.93rem}
.header-cta{display:flex;align-items:center;gap:8px}
.icon-btn{display:inline-grid;place-items:center;width:40px;height:40px;border-radius:10px;border:1px solid var(--line);background:var(--surface);color:var(--ink);cursor:pointer}
.icon-btn:hover{border-color:var(--brand)}
.burger{display:none;gap:4px;align-content:center}
.burger span{display:block;width:18px;height:2px;background:currentColor;border-radius:2px;margin:0 auto}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 20px;border-radius:999px;border:1.5px solid transparent;font:600 .97rem/1.1 var(--font);text-decoration:none;cursor:pointer;transition:transform .15s ease,background .15s ease,box-shadow .15s ease;white-space:nowrap}
.btn:hover{transform:translateY(-1px)}
.btn:active{transform:none}
.btn-primary{background:var(--brand);color:var(--brand-ink)}
.btn-primary:hover{background:var(--brand-2);color:var(--brand-ink)}
.btn-accent{background:var(--accent);color:var(--accent-ink);box-shadow:0 6px 18px color-mix(in srgb,var(--accent) 35%,transparent)}
.btn-accent:hover{background:var(--accent-2);color:var(--accent-ink)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand)}
.btn-ghost-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.5)}
.btn-ghost-light:hover{border-color:#fff;color:#fff;background:rgba(255,255,255,.08)}
.btn-sm{padding:8px 14px;font-size:.88rem}
.btn-lg{padding:15px 26px;font-size:1.05rem}
.btn-block{width:100%}
.btn[disabled]{opacity:.6;cursor:wait;transform:none}
.chip{display:inline-flex;align-items:center;gap:6px;padding:6px 12px;border-radius:999px;border:1px solid var(--line);background:var(--surface);color:var(--ink-2);font:500 .86rem var(--font);text-decoration:none;cursor:pointer}
.chip:hover,.chip.active{border-color:var(--brand);color:var(--brand);background:var(--brand-soft)}
.chips-row{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin-top:18px}
.badge{display:inline-block;padding:3px 9px;border-radius:999px;background:var(--brand-soft);color:var(--brand);font:600 .74rem var(--font);letter-spacing:.02em}
.badge-accent{background:var(--accent-soft);color:var(--accent)}

/* Hero */
.hero{position:relative;overflow:hidden;padding:64px 0 56px;background:radial-gradient(1200px 500px at 85% -10%,color-mix(in srgb,var(--brand) 16%,transparent),transparent 60%),radial-gradient(900px 400px at -10% 110%,color-mix(in srgb,var(--accent) 12%,transparent),transparent 60%)}
.hero-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:48px;align-items:center}
.hero h1 em{font-style:normal;color:var(--brand)}
.hero-art{position:relative;aspect-ratio:1/1;max-width:420px;justify-self:end;width:100%}
.shelf{position:absolute;inset:auto 0 12% 0;display:flex;align-items:flex-end;gap:8px;justify-content:center}
.shelf i{display:block;width:13%;border-radius:6px 6px 3px 3px;box-shadow:inset -6px 0 0 rgba(0,0,0,.08)}
.shelf::after{content:"";position:absolute;left:-4%;right:-4%;bottom:-14px;height:14px;border-radius:4px;background:var(--surface-3)}
.search-card{margin-top:26px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);padding:10px;max-width:720px}
.search-tabs{display:flex;flex-wrap:wrap;gap:4px;padding:4px 4px 10px}
.search-tabs button{flex:0 0 auto;border:0;background:none;padding:8px 14px;border-radius:999px;font:600 .9rem var(--font);color:var(--muted);cursor:pointer}
.search-tabs button[aria-selected="true"]{background:var(--brand-soft);color:var(--brand)}
.search-row{display:flex;gap:8px}
.search-row input{flex:1;min-width:0;font-size:1.06rem;padding:15px 16px;border-radius:12px;border:1.5px solid var(--line);background:var(--bg);color:var(--ink)}
.search-row input:focus{border-color:var(--brand);outline:none;box-shadow:0 0 0 4px color-mix(in srgb,var(--brand) 18%,transparent)}
.search-hints{display:flex;flex-wrap:wrap;gap:6px;margin:12px 4px 2px;font-size:.84rem;color:var(--muted);align-items:center}
.search-hints button{border:0;background:var(--surface-2);color:var(--ink-2);border-radius:999px;padding:4px 10px;font:500 .8rem var(--font);cursor:pointer}
.search-hints button:hover{background:var(--brand-soft);color:var(--brand)}
.search-inline{display:flex;gap:8px;max-width:560px;margin:22px auto 0}
.search-inline input{flex:1;min-width:0;padding:13px 15px;border:1.5px solid var(--line);border-radius:12px;background:var(--surface);color:var(--ink);font-size:1rem}
.trust-row{display:flex;flex-wrap:wrap;gap:10px 22px;margin-top:22px;color:var(--muted);font-size:.9rem}
.trust-row span::before{content:"\2713";color:var(--ok);font-weight:700;margin-right:6px}

/* Sections */
.section{padding:72px 0}
.section-tight{padding:48px 0}
.section.alt{background:var(--surface-2)}
.section-head{max-width:720px;margin-bottom:34px}
.section-head.center{margin-left:auto;margin-right:auto}
.page-hero{padding:46px 0 34px;border-bottom:1px solid var(--line);background:linear-gradient(180deg,var(--surface-2),var(--bg))}
.page-hero h1{font-size:clamp(1.9rem,3.8vw,2.9rem)}
.crumbs{font-size:.85rem;color:var(--muted);margin-bottom:14px}
.crumbs a{color:var(--muted);text-decoration:none}
.crumbs a:hover{color:var(--brand)}
.meta{color:var(--muted);font-size:.9rem;margin:0}

/* Grids & cards */
.grid{display:grid;gap:20px}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow)}
.card h3{margin-bottom:.35em}
.card p:last-child{margin-bottom:0}
.card-link{display:block;text-decoration:none;color:var(--ink);transition:transform .18s ease,border-color .18s ease,box-shadow .18s ease}
.card-link:hover{transform:translateY(-3px);border-color:var(--brand);box-shadow:var(--shadow-lg);color:var(--ink)}
.card-link p{color:var(--muted);font-size:.95rem}
.card-link .badge{margin-bottom:10px}
.card-icon{width:46px;height:46px;border-radius:12px;display:grid;place-items:center;background:var(--brand-soft);color:var(--brand);font-size:1.35rem;margin-bottom:14px}
.card-icon.accent{background:var(--accent-soft);color:var(--accent)}
.go{display:inline-block;margin-top:10px;font-weight:600;color:var(--brand)}
.steps{counter-reset:s;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;list-style:none;padding:0;margin:0}
.steps li{position:relative;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:26px 22px 22px;box-shadow:var(--shadow)}
.steps li::before{counter-increment:s;content:counter(s);display:grid;place-items:center;width:38px;height:38px;border-radius:50%;background:var(--brand);color:var(--brand-ink);font:700 1rem var(--font);margin-bottom:12px}
.stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
.stat{padding:20px;border-radius:var(--radius);background:var(--surface);border:1px solid var(--line);text-align:center}
.stat b{display:block;font:700 2rem/1 var(--serif);color:var(--brand);margin-bottom:6px}
.stat span{color:var(--muted);font-size:.9rem}

/* Book cards */
.book-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:20px}
.book-card{display:flex;flex-direction:column;text-decoration:none;color:var(--ink);background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:transform .18s ease,box-shadow .18s ease}
.book-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);color:var(--ink)}
.cover{aspect-ratio:2/3;background:var(--surface-2);display:grid;place-items:center;overflow:hidden;position:relative}
.cover img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.cover-ph{padding:14px;text-align:center;font:600 .9rem/1.3 var(--serif);color:var(--muted)}
.book-card .bc-body{padding:12px 12px 14px}
.book-card h3{font-size:.98rem;margin:0 0 4px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.book-card p{font-size:.82rem;color:var(--muted);margin:0}
.skeleton{background:linear-gradient(90deg,var(--surface-2),var(--surface-3),var(--surface-2));background-size:200% 100%;animation:sk 1.2s infinite linear;border-radius:var(--radius);min-height:260px}
@keyframes sk{to{background-position:-200% 0}}

/* Book detail */
.book-detail{display:grid;grid-template-columns:260px 1fr;gap:36px;align-items:start}
.book-detail .cover{border-radius:var(--radius);box-shadow:var(--shadow-lg)}
.kv{display:grid;grid-template-columns:auto 1fr;gap:6px 16px;font-size:.95rem;margin:16px 0}
.kv dt{color:var(--muted)}
.kv dd{margin:0}
.isbn-chips{display:flex;flex-wrap:wrap;gap:6px}
.panel-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:28px}
.mk-list{list-style:none;margin:0;padding:0;display:grid;gap:8px}
.mk-list li{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 14px;border:1px solid var(--line);border-radius:12px;background:var(--bg)}
.mk-list .mk-name{font-weight:600}
.mk-list .mk-note{display:block;font-size:.82rem;color:var(--muted);font-weight:400}
.mk-list .btn{flex-shrink:0}
.match{display:flex;gap:14px;align-items:center;padding:14px 16px;border:1px solid var(--line);border-radius:12px;background:var(--surface);text-decoration:none;color:var(--ink)}
.match:hover{border-color:var(--brand);color:var(--ink)}
.match img{border-radius:4px;flex-shrink:0}
.search-layout{grid-template-columns:minmax(0,1fr) 320px}
.dir{columns:2;column-gap:28px}
.dir>div{break-inside:avoid;margin-bottom:20px}

/* Forms */
.form{display:grid;gap:16px}
.field{display:grid;gap:6px;align-content:start}
.field label,.legend{font-weight:600;font-size:.92rem;color:var(--ink-2)}
.field .help{font-size:.8rem;color:var(--muted)}
input,select,textarea{font:inherit;color:var(--ink);background:var(--surface);border:1.5px solid var(--line);border-radius:11px;padding:12px 13px;width:100%}
textarea{min-height:120px;resize:vertical}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 4px color-mix(in srgb,var(--brand) 16%,transparent)}
input[type=checkbox],input[type=radio]{width:auto;padding:0;accent-color:var(--brand)}
input[type=range]{padding:0;border:0;accent-color:var(--brand)}
.row-2{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.row-3{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.check{display:flex;gap:10px;align-items:flex-start;font-weight:500;font-size:.93rem;color:var(--ink-2)}
.check input{margin-top:4px}
.options{display:grid;grid-template-columns:repeat(auto-fill,minmax(190px,1fr));gap:8px}
.opt{position:relative}
.opt input{position:absolute;opacity:0}
.opt span{display:block;padding:12px 14px;border:1.5px solid var(--line);border-radius:12px;background:var(--surface);cursor:pointer;font-weight:500;font-size:.92rem}
.opt input:checked+span{border-color:var(--brand);background:var(--brand-soft);color:var(--brand)}
.opt input:focus-visible+span{outline:3px solid var(--accent);outline-offset:2px}
.form-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);padding:28px;box-shadow:var(--shadow-lg)}
.progress{height:6px;border-radius:99px;background:var(--surface-3);overflow:hidden;margin-bottom:6px}
.progress i{display:block;height:100%;width:33%;background:linear-gradient(90deg,var(--brand),var(--accent));transition:width .3s ease}
.step-label{font-size:.82rem;color:var(--muted);margin-bottom:18px}
.form-nav{display:flex;gap:10px;justify-content:space-between;margin-top:6px}
.success{display:none;padding:22px;border-radius:var(--radius);background:var(--brand-soft);color:var(--ink);border:1px solid color-mix(in srgb,var(--brand) 40%,transparent)}
.success.show{display:block}
.success h3{color:var(--brand)}
form.sent>*:not(.success){display:none}
.newsletter{margin-top:16px}
.nl-label{display:block;font-size:.9rem;color:var(--muted);margin-bottom:8px}
.nl-row{display:flex;gap:8px}
.nl-row input{flex:1;min-width:0}

/* Tabs */
.tabs{display:flex;flex-wrap:wrap;gap:6px;border-bottom:1px solid var(--line);margin-bottom:22px}
.tabs [role=tab]{border:0;background:none;padding:12px 16px;font:600 .95rem var(--font);color:var(--muted);border-bottom:3px solid transparent;cursor:pointer;margin-bottom:-1px}
.tabs [role=tab][aria-selected="true"]{color:var(--brand);border-bottom-color:var(--brand)}
[role=tabpanel][hidden]{display:none}

/* Tools */
.tool-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:28px;align-items:start}
.result{position:sticky;top:90px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);padding:26px;box-shadow:var(--shadow-lg)}
.result h2{font-size:1.5rem}
.big{font:700 clamp(1.8rem,4vw,2.6rem)/1.1 var(--serif);color:var(--brand);margin:6px 0 10px}
.meter{height:12px;border-radius:99px;background:var(--surface-3);overflow:hidden;margin:12px 0}
.meter i{display:block;height:100%;width:0;background:linear-gradient(90deg,#9DB7AE,var(--brand),var(--accent));transition:width .4s ease}
.factors{list-style:none;padding:0;margin:12px 0;font-size:.9rem}
.factors li{display:flex;justify-content:space-between;gap:10px;padding:6px 0;border-bottom:1px dashed var(--line)}
.factors .plus{color:var(--ok);font-weight:600}
.factors .minus{color:var(--danger);font-weight:600}
.out{padding:14px;border-radius:12px;background:var(--bg);border:1px dashed var(--line);font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.88rem;white-space:pre-wrap;word-break:break-word}
table{width:100%;border-collapse:collapse;font-size:.94rem;margin:0 0 1.2em}
th,td{text-align:left;padding:10px 12px;border-bottom:1px solid var(--line);vertical-align:top}
th{background:var(--surface-2);font-weight:600}
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius)}
.table-wrap table{margin:0}

/* Prose */
.guide-grid{display:grid;grid-template-columns:240px minmax(0,1fr);gap:48px;padding-top:36px;padding-bottom:30px;max-width:1080px}
.toc{position:sticky;top:92px;font-size:.88rem;border-left:2px solid var(--line);padding-left:14px}
.toc-h{font-weight:700;color:var(--ink);margin-bottom:8px}
.toc ol{list-style:none;padding:0;margin:0;display:grid;gap:6px}
.toc a{color:var(--muted);text-decoration:none}
.toc a:hover,.toc a.on{color:var(--brand)}
.prose{font-size:1.06rem;max-width:72ch}
.prose h2{margin-top:1.8em;font-size:1.65rem}
.prose h3{margin-top:1.4em;font-size:1.25rem}
.prose li{margin-bottom:.35em}
.prose blockquote{margin:1.4em 0;padding:14px 20px;border-left:4px solid var(--accent);background:var(--surface-2);border-radius:0 12px 12px 0;color:var(--ink-2)}
.prose blockquote p:last-child{margin:0}
.prose code{background:var(--surface-2);padding:2px 6px;border-radius:6px;font-size:.92em}
.prose table{font-size:.93rem}
.prose .table-wrap{margin-bottom:1.3em}
.callout{display:flex;gap:20px;align-items:center;justify-content:space-between;flex-wrap:wrap;margin:34px 0;padding:22px 24px;border-radius:var(--radius-lg);border:1px solid var(--line);background:var(--surface)}
.callout-cta{background:linear-gradient(135deg,var(--brand-soft),var(--accent-soft));border:0}
.callout-h{font:700 1.2rem var(--serif);margin-bottom:4px}
.callout p{margin:0;max-width:56ch}
.callout-actions{display:flex;gap:10px;flex-wrap:wrap}
.note{padding:14px 16px;border-radius:12px;background:var(--accent-soft);border:1px solid color-mix(in srgb,var(--accent) 30%,transparent);font-size:.92rem}
.faq details{border:1px solid var(--line);border-radius:12px;background:var(--surface);margin-bottom:10px}
.faq summary{cursor:pointer;padding:16px 18px;font-weight:600;list-style:none;position:relative;padding-right:44px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:18px;top:12px;font-size:1.4rem;color:var(--brand)}
.faq details[open] summary::after{content:"\2212"}
.faq details p{padding:0 18px 16px;margin:0;color:var(--ink-2)}
.share{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin:20px 0 10px;color:var(--muted);font-size:.9rem}
.related{padding:20px 20px 60px}
.guide-video{margin-top:30px}

/* Video */
.video{margin:0}
.yt{position:relative;display:block;width:100%;aspect-ratio:16/9;border:0;border-radius:var(--radius);background:#111 center/cover no-repeat;cursor:pointer;overflow:hidden}
.yt::before{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(0,0,0,.05),rgba(0,0,0,.45))}
.yt-play{position:absolute;left:50%;top:50%;width:68px;height:48px;transform:translate(-50%,-50%);border-radius:14px;background:#E21D1D}
.yt-play::after{content:"";position:absolute;left:27px;top:14px;border-style:solid;border-width:10px 0 10px 17px;border-color:transparent transparent transparent #fff}
.yt:hover .yt-play{background:#FF0000}
.video iframe{width:100%;aspect-ratio:16/9;border:0;border-radius:var(--radius);display:block}
.video figcaption{font-size:.88rem;color:var(--muted);margin-top:8px}

/* Lead band */
.lead-band{background:linear-gradient(120deg,var(--brand),#123D33);color:#F4EFE6;padding:56px 0}
[data-theme="dark"] .lead-band{background:linear-gradient(120deg,#163D33,#0E2621)}
.lead-band h2{color:#fff}
.lead-band .eyebrow{color:#F6B58C}
.lead-band p{color:#E7E0D4;max-width:60ch}
.lead-band-in{display:grid;grid-template-columns:1.4fr auto;gap:32px;align-items:center}
.lead-band-cta{display:flex;gap:12px;flex-wrap:wrap}

/* Footer */
.site-footer{background:var(--surface-2);border-top:1px solid var(--line);padding:56px 0 26px;font-size:.93rem}
.foot-top{display:grid;grid-template-columns:1fr 1.6fr;gap:44px}
.foot-brand p{color:var(--muted);margin-top:12px}
.foot-cols{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
.foot-cols h3{font:700 .8rem var(--font);text-transform:uppercase;letter-spacing:.1em;color:var(--muted)}
.foot-cols ul{list-style:none;padding:0;margin:0;display:grid;gap:7px}
.foot-cols a{color:var(--ink-2);text-decoration:none}
.foot-cols a:hover{color:var(--brand);text-decoration:underline}
.foot-bottom{margin-top:36px;padding-top:20px;border-top:1px solid var(--line);color:var(--muted);font-size:.84rem}
.foot-bottom a{color:var(--muted)}

/* Overlays */
.sticky-cta{position:fixed;left:12px;right:12px;bottom:12px;z-index:60;display:flex;align-items:center;gap:10px;padding:10px 12px 10px 16px;border-radius:999px;background:var(--ink);color:var(--bg);box-shadow:var(--shadow-lg);font-weight:600;font-size:.92rem}
.sticky-cta span{flex:1}
.sticky-x{background:none;border:0;color:inherit;font-size:1.4rem;line-height:1;cursor:pointer;padding:0 4px}
.sticky-cta[hidden]{display:none}
@media(min-width:861px){.sticky-cta{display:none!important}}
.modal{position:fixed;inset:0;z-index:100;display:grid;place-items:center;padding:20px;background:rgba(14,12,9,.55)}
.modal[hidden]{display:none}
.modal-card{position:relative;width:min(460px,100%);background:var(--surface);border-radius:var(--radius-lg);padding:30px;box-shadow:var(--shadow-lg);animation:pop .2s ease}
@keyframes pop{from{transform:scale(.96);opacity:0}}
.modal-x{position:absolute;right:12px;top:10px;border:0;background:none;font-size:1.7rem;color:var(--muted);cursor:pointer}
.modal .field{margin-bottom:12px}
.cookie{position:fixed;left:16px;bottom:16px;z-index:70;max-width:380px;display:flex;gap:12px;align-items:center;padding:14px 16px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-lg);font-size:.85rem}
.cookie p{margin:0}
.cookie[hidden]{display:none}
.toast{position:fixed;left:50%;bottom:24px;transform:translate(-50%,140%);opacity:0;visibility:hidden;z-index:120;background:var(--ink);color:var(--bg);padding:12px 18px;border-radius:12px;font-size:.92rem;box-shadow:var(--shadow-lg);transition:transform .25s ease;pointer-events:none}
.toast.show{transform:translate(-50%,0);opacity:1;visibility:visible}
.to-top{position:fixed;right:16px;bottom:80px;z-index:40;width:42px;height:42px;border-radius:50%;display:grid;place-items:center;background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow);text-decoration:none;color:var(--ink);opacity:0;pointer-events:none;transition:opacity .2s}
.to-top.show{opacity:1;pointer-events:auto}
.ad-slot{margin:28px 0;text-align:center}
.ad-label{display:block;font-size:.7rem;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);margin-bottom:4px}

/* Misc */
.filter-bar{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:24px}
.list-check{list-style:none;padding:0}
.list-check li{padding-left:28px;position:relative;margin-bottom:8px}
.list-check li::before{content:"\2713";position:absolute;left:0;top:0;color:var(--ok);font-weight:700}
.tier{display:flex;flex-direction:column}
.tier .price{font:700 2rem var(--serif);color:var(--brand)}
.tier ul{flex:1}
.split{display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:start}
.pill-list{display:flex;flex-wrap:wrap;gap:8px;list-style:none;padding:0}
.gloss dt{font:700 1.08rem var(--serif);margin-top:18px}
.gloss dd{margin:4px 0 0;color:var(--ink-2)}
.letter{font:700 1.6rem var(--serif);color:var(--accent);border-bottom:1px solid var(--line);margin-top:30px;padding-bottom:4px}
.legal h2{font-size:1.4rem;margin-top:1.6em}
.empty{padding:30px;text-align:center;color:var(--muted);border:1px dashed var(--line);border-radius:var(--radius)}
.mt-0{margin-top:0}.mt-2{margin-top:20px}.mt-3{margin-top:32px}.mb-0{margin-bottom:0}

/* Responsive */
@media(max-width:1180px){
  .burger{display:inline-grid}
  .nav{position:fixed;inset:66px 0 auto 0;margin:0;background:var(--surface);border-bottom:1px solid var(--line);box-shadow:var(--shadow-lg);max-height:calc(100vh - 66px);overflow:auto;display:none}
  .nav.open{display:block}
  .nav-list{flex-direction:column;align-items:stretch;padding:10px 16px 18px;gap:2px}
  .nav-list a,.sub-toggle{width:100%;text-align:left;padding:12px}
  .sub{position:static;box-shadow:none;border:0;padding:0 0 0 14px;min-width:0;background:transparent}
}
@media(max-width:960px){
  .hero-grid,.tool-grid,.split,.lead-band-in,.foot-top{grid-template-columns:1fr}
  .hero-art{display:none}
  .grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .stats{grid-template-columns:repeat(2,minmax(0,1fr))}
  .guide-grid{grid-template-columns:1fr;gap:0}
  .toc-wrap{display:none}
  .result{position:static}
  .search-layout{grid-template-columns:1fr}
  .panel-grid{grid-template-columns:1fr}
  .foot-cols{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media(max-width:720px){
  body{font-size:16px}
  .section{padding:52px 0}
  .grid-2,.grid-3,.steps{grid-template-columns:1fr}
  .row-2,.row-3{grid-template-columns:1fr}
  .book-detail{grid-template-columns:1fr}
  .book-detail .cover{max-width:220px}
  .dir{columns:1}
  .search-row{flex-direction:column}
  .search-row .btn{width:100%}
  .hero{padding:42px 0 40px}
  .cookie{right:16px;max-width:none;bottom:76px}
  .hide-xs{display:none}
  .tabs{flex-wrap:nowrap;overflow-x:auto;-webkit-overflow-scrolling:touch}
  .tabs [role=tab]{white-space:nowrap}
  .logo-text small{display:none}
}
@media(max-width:480px){.btn{white-space:normal;text-align:center}.form-nav{flex-wrap:wrap}}
@media(max-width:420px){.grid-4,.stats{grid-template-columns:1fr}.book-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
@media print{.topbar,.site-header,.site-footer,.lead-band,.sticky-cta,.cookie,.to-top,.share,.toc-wrap,.ad-slot,.callout-cta{display:none!important}body{background:#fff;color:#000}.guide-grid{display:block}a{color:#000}}