:root{--brand:#2b3fd6;--brand-ink:#fff;--ink:#111936;--muted:#5d6785;--bg:#f5f6fb;--card:#fff;--line:#e3e6f2;--mark:#ffd93d;--ok:#13814a;--warn:#c2410c;--r:14px}
@media (prefers-color-scheme:dark){:root{--brand:#8795ff;--brand-ink:#0d1230;--ink:#eef0ff;--muted:#a3abcf;--bg:#0d1230;--card:#161d44;--line:#27305f;--ok:#4ade80;--warn:#fb923c}}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.65 'DM Sans',system-ui,sans-serif}
h1,h2,h3,.brand,.btn,button,th,.price,.amount b,.prog{font-family:'Bricolage Grotesque','DM Sans',sans-serif}
h1,h2,h3{line-height:1.15;margin:0 0 .5em}
a{color:inherit}
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}
main.wrap{min-height:70vh;padding-bottom:56px}
:focus-visible{outline:3px solid var(--mark);outline-offset:2px}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}

/* header */
.top{background:var(--card);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
.bar{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:64px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.3rem;text-decoration:none}
.brand small{font-weight:600;font-size:.7rem;background:var(--mark);color:#111936;padding:2px 8px;border-radius:99px}
.logo{display:grid;place-items:center;width:34px;height:34px;border-radius:9px;background:var(--mark);color:#111936;font-weight:800}
nav{display:flex;align-items:center;gap:6px;flex-wrap:wrap}
nav a{text-decoration:none;font-weight:500;padding:8px 12px;border-radius:8px;color:var(--muted)}
nav a:hover,nav a.on{background:var(--bg);color:var(--ink)}
nav a.pill{background:var(--ink);color:var(--card)}
@media(max-width:600px){nav a:not(.pill){display:none}.admin nav a{display:inline-block}}

/* buttons & forms */
.btn,button{display:inline-block;background:var(--brand);color:var(--brand-ink);border:0;border-radius:10px;padding:11px 20px;font-weight:700;font-size:1rem;text-decoration:none;cursor:pointer;text-align:center;line-height:1.3}
.btn:hover,button:hover{filter:brightness(1.08)}
.btn.lg{padding:14px 26px;font-size:1.05rem}.btn.sm,button.sm,td button{padding:6px 12px;font-size:.85rem;border-radius:8px}
.btn.block,button.block{display:block;width:100%}
.btn.alt,button.ghost{background:transparent;color:var(--ink);border:1.5px solid var(--line)}
.btn.alt:hover,button.ghost:hover{border-color:var(--ink)}
label{display:block;font-weight:600;margin:16px 0 6px}label small{font-weight:400;color:var(--muted)}
input,textarea{width:100%;padding:12px 14px;font:inherit;border:1.5px solid var(--line);border-radius:10px;background:var(--card);color:var(--ink)}
input:focus,textarea:focus{border-color:var(--brand);outline:none;box-shadow:0 0 0 3px color-mix(in srgb,var(--brand) 25%,transparent)}
input[type=file]{padding:9px}
.two{display:grid;grid-template-columns:1fr 1fr;gap:16px}
hr{border:0;border-top:1px solid var(--line);margin:22px 0}

/* hero */
.hero{display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center;padding:56px 0 48px}
.hero h1{font-size:clamp(2.6rem,7vw,4.6rem);font-weight:800;letter-spacing:-.02em;margin-bottom:.3em}
.hero mark{background:var(--mark);color:#111936;padding:0 .12em;border-radius:6px}
.hero p{font-size:1.15rem;color:var(--muted);max-width:44ch;margin:0 0 26px}
.cta{display:flex;gap:12px;flex-wrap:wrap}
.trust{list-style:none;display:flex;gap:10px 22px;flex-wrap:wrap;padding:0;margin:26px 0 0;color:var(--muted);font-size:.92rem}
.trust li::before{content:"✓";color:var(--ok);font-weight:800;margin-right:6px}
.hero-art{display:flex;justify-content:center}
.stack{display:block;width:min(300px,80%);aspect-ratio:3/4;object-fit:cover;object-position:top;background:#fff;border-radius:6px;transform:rotate(3deg);box-shadow:-14px 14px 0 var(--mark),0 24px 50px rgba(17,25,54,.25)}
.nb{position:relative;background:#fff;color:#111936;display:flex;align-items:flex-end;padding:22px;font:800 1.6rem 'Bricolage Grotesque',sans-serif}
.nb i{position:absolute;left:0;right:0;height:1px;background:#cfd6f5;top:30%}
.nb i:nth-child(2){top:42%}.nb i:nth-child(3){top:54%}.nb i:nth-child(4){top:66%}
@media(max-width:800px){.hero{grid-template-columns:1fr;padding-top:32px}.hero-art{order:-1}.stack{width:200px}}

/* sections */
.sec{font-size:1.7rem;margin:32px 0 18px}
.books{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:22px}
.book{background:var(--card);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;display:flex;flex-direction:column;transition:transform .15s,box-shadow .15s}
.book:hover{transform:translateY(-3px);box-shadow:0 12px 30px rgba(17,25,54,.12)}
.imglink{display:block;background:var(--bg)}
.thumb{display:block;width:100%;aspect-ratio:3/4;object-fit:cover;object-position:top;background:#fff}
.thumb.sm{width:90px;border-radius:6px;margin-bottom:12px}
.noimg{display:grid;place-items:center;text-align:center;padding:18px;background:var(--mark);color:#111936;font:800 1.2rem 'Bricolage Grotesque',sans-serif}
.bd{padding:16px 18px 18px;display:flex;flex-direction:column;gap:6px;flex:1}
.book h3{font-size:1.1rem;margin:0}.book h3 a{text-decoration:none}
.row{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:auto;padding-top:10px}
.price{font-weight:800;font-size:1.4rem}.price.xl{font-size:2.4rem}
.meta{font-size:.88rem;color:var(--muted);margin:0}
.empty{color:var(--muted)}
.steps{list-style:none;counter-reset:s;display:grid;grid-template-columns:repeat(auto-fit,minmax(210px,1fr));gap:18px;padding:0;margin:0}
.steps li{counter-increment:s;background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:20px;display:flex;flex-direction:column;gap:4px}
.steps li::before{content:counter(s);display:grid;place-items:center;width:32px;height:32px;border-radius:50%;background:var(--mark);color:#111936;font:800 .95rem 'Bricolage Grotesque',sans-serif;margin-bottom:8px}
.steps b{font-family:'Bricolage Grotesque',sans-serif;font-size:1.05rem}.steps span{color:var(--muted);font-size:.94rem}

/* book page */
.crumbs{margin:22px 0 8px;color:var(--muted);font-size:.9rem}.crumbs a{text-decoration:none}.crumbs a:hover{text-decoration:underline}
.detail{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,6fr);gap:48px;padding:12px 0 40px;align-items:start}
.preview{display:block;width:100%;max-width:440px;height:auto;margin:0 auto;border-radius:6px;background:#fff;box-shadow:-10px 10px 0 var(--mark),0 18px 40px rgba(17,25,54,.2)}
.noimg.preview{aspect-ratio:3/4}
.cap{text-align:center;margin-top:22px}
.info h1{font-size:clamp(1.9rem,4vw,2.6rem);font-weight:800}
.desc{color:var(--muted);font-size:1.05rem;max-width:52ch}
.facts{list-style:none;display:grid;grid-template-columns:repeat(3,1fr);gap:12px;padding:0;margin:22px 0}
.facts li{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:12px 14px;font-size:.85rem;color:var(--muted)}
.facts b{display:block;font:800 1.2rem 'Bricolage Grotesque',sans-serif;color:var(--ink)}
.buybox{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:22px;display:grid;gap:12px}
.stickybuy{display:none}
@media(max-width:800px){.detail{grid-template-columns:1fr;gap:28px}.facts{grid-template-columns:1fr}
 .stickybuy{display:flex;position:fixed;left:0;right:0;bottom:0;z-index:30;justify-content:space-between;align-items:center;background:var(--card);border-top:1px solid var(--line);padding:10px 20px}
 main.wrap{padding-bottom:90px}}

/* checkout, order */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:26px;margin:0 0 24px}
.card h2{font-size:1.35rem}
.card.narrow{max-width:520px;margin:0 auto 24px}.card.wide{max-width:none}
.checkout{display:grid;grid-template-columns:minmax(0,3fr) minmax(0,2fr);gap:24px;align-items:start;margin-top:12px}
.sum h3{font-size:1.05rem;margin:0}.line{display:flex;justify-content:space-between;align-items:center;border-top:1px solid var(--line);margin-top:16px;padding-top:14px;font-weight:600}
@media(max-width:800px){.checkout{grid-template-columns:1fr}.sum{order:-1}}
.prog{list-style:none;counter-reset:p;display:flex;gap:8px;justify-content:center;padding:0;margin:26px auto;max-width:520px;font-weight:600;font-size:.9rem}
.prog li{counter-increment:p;flex:1;text-align:center;color:var(--muted);padding-top:34px;position:relative}
.prog li::before{content:counter(p);position:absolute;top:0;left:50%;transform:translateX(-50%);width:26px;height:26px;border-radius:50%;display:grid;place-items:center;background:var(--line);color:var(--ink);font-size:.8rem}
.prog li.cur{color:var(--ink)}.prog li.cur::before{background:var(--mark);color:#111936}
.prog li.done{color:var(--ink)}.prog li.done::before{content:"✓";background:var(--ok);color:#fff}
.amount{font-size:1.2rem;margin:16px 0}.amount b{font-size:2.6rem}
.kv{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin:10px 0}.kv>span:first-child{color:var(--muted);min-width:110px;font-size:.9rem}
.upi{background:var(--mark);color:#111936;padding:3px 10px;border-radius:6px;font-weight:700;word-break:break-all}
.flash{padding:12px 16px;border-radius:10px;margin:16px 0;background:color-mix(in srgb,var(--ok) 14%,var(--card));border:1px solid color-mix(in srgb,var(--ok) 40%,var(--line))}
.flash.warn{background:color-mix(in srgb,var(--warn) 12%,var(--card));border-color:color-mix(in srgb,var(--warn) 40%,var(--line))}
.err{color:var(--warn);font-weight:600}

/* admin */
.admin main.wrap{padding-top:24px}
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:14px;margin:0 0 20px}
.stats div{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px 18px}
.stats b{display:block;font:800 1.9rem 'Bricolage Grotesque',sans-serif}.stats span{font-size:.85rem;color:var(--muted)}
.tabs{display:flex;gap:8px;margin:0 0 14px}.tabs a{padding:6px 14px;border:1.5px solid var(--line);border-radius:99px;text-decoration:none;font-weight:600;font-size:.9rem}.tabs a:hover{border-color:var(--ink)}
.tbl{overflow-x:auto;background:var(--card);border:1px solid var(--line);border-radius:var(--r);margin:0 0 32px}
table{border-collapse:collapse;width:100%;font-size:.92rem}
th{text-align:left;padding:12px;background:var(--bg);color:var(--muted);font-size:.8rem;font-weight:700}
td{padding:12px;border-top:1px solid var(--line);vertical-align:top}
td form{display:flex;gap:6px;flex-wrap:wrap;margin:0}
.badge{padding:2px 10px;border-radius:99px;font-size:.78rem;background:var(--mark);color:#111936;font-weight:700}.badge.paid{background:var(--ok);color:#fff}
.mini{width:40px;height:54px;object-fit:cover;object-position:top;border-radius:4px}

footer{border-top:1px solid var(--line);background:var(--card);padding:28px 0;color:var(--muted);font-size:.9rem}
.foot{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}footer strong{color:var(--ink);font-family:'Bricolage Grotesque',sans-serif;font-size:1.05rem}