/* Learning AI 101 — shared styles */
:root{
  --ink:#1F2433; --muted:#3B4252; --soft:#5B6270; --brand:#2E2A6B; --brand-2:#4B47A8;
  --l1:#2563EB; --l1-bg:#EAF1FF; --l1-ink:#1D4ED8;
  --l2:#15803D; --l2-bg:#E6F6EC; --l2-ink:#15803D;
  --l3:#7C3AED; --l3-bg:#F1EBFF; --l3-ink:#6D28D9;
  --l4:#C2410C; --l4-bg:#FFF0E3; --l4-ink:#C2410C;
  --l5:#B91C1C;
  --panel:#F4F5FA; --line:#E1E4EE; --bg:#FFFFFF;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
body{margin:0;font-family:'DM Sans',system-ui,-apple-system,'Segoe UI',sans-serif;color:var(--ink);background:var(--bg);font-size:17px;line-height:1.6;-webkit-text-size-adjust:100%}
img{max-width:100%;height:auto;display:block}
a{color:var(--brand)} a:hover{color:var(--brand-2)}
a:focus-visible{outline:3px solid var(--l1);outline-offset:3px}
h1,h2,h3{color:var(--brand);margin:0}
h2{font-size:clamp(28px,5vw,40px);line-height:1.12;letter-spacing:-.01em}
.wrap{max-width:1120px;margin:0 auto;padding-left:32px;padding-right:32px}
@media (max-width:600px){.wrap{padding-left:16px;padding-right:16px}}
.section{padding-top:80px;padding-bottom:40px}
.lead{margin:14px 0 0;max-width:700px;font-size:19px;color:var(--muted)}

/* stripe */
.stripe{display:flex;height:6px}
.stripe span{flex:1}
.stripe span:nth-child(1){background:var(--l1)}.stripe span:nth-child(2){background:var(--l2)}
.stripe span:nth-child(3){background:var(--l3)}.stripe span:nth-child(4){background:var(--l4)}
.stripe span:nth-child(5){background:var(--l5)}

/* nav */
.nav{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px 24px;padding-top:16px;padding-bottom:16px}
.nav .logo img{height:52px;width:auto}
.nav .links{display:flex;flex-wrap:wrap;align-items:center;gap:8px 24px}
.nav .links a{color:var(--ink);text-decoration:none;font-weight:500}
.nav .links a:hover{color:var(--brand)}
.nav .links a.btn,.nav .links a.btn:hover{color:#fff}
.nav .links a[aria-current="page"]{color:var(--brand);font-weight:700}
@media (max-width:700px){.nav .links .hide-sm{display:none}}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 26px;border-radius:999px;font-weight:700;text-decoration:none;font-size:17px;border:2px solid var(--brand);background:var(--brand);color:#fff;transition:background .15s,color .15s}
.btn:hover{background:var(--brand-2);border-color:var(--brand-2);color:#fff}
.btn.outline{background:transparent;color:var(--brand)}
.btn.outline:hover{background:var(--brand);color:#fff}
.btn.light{background:#fff;color:var(--brand);border-color:#fff}
.btn.light:hover{background:#E9E8FB;border-color:#E9E8FB;color:var(--brand)}
.btn.lg{min-height:54px;padding:0 32px;font-size:18px}
.btn.sm{min-height:44px;padding:0 20px;font-size:16px}
.btn.block{width:100%}

/* hero */
.hero{display:flex;flex-wrap:wrap;align-items:center;gap:48px;padding-top:40px;padding-bottom:72px}
.hero .copy{flex:1 1 min(460px,100%);min-width:0}
.hero .art{flex:1 1 min(380px,100%);min-width:0;display:flex;justify-content:center}
.hero .art img{width:min(440px,100%);filter:drop-shadow(0 18px 30px rgba(46,42,107,.18))}
.pill{display:inline-block;padding:6px 14px;border-radius:999px;background:var(--l1-bg);color:var(--l1-ink);font-weight:700;font-size:14px;letter-spacing:.04em}
.hero h1{margin-top:20px;font-size:clamp(36px,7vw,60px);line-height:1.05;letter-spacing:-.02em}
.hero p.sub{margin:24px 0 0;font-size:20px;color:var(--muted);max-width:540px}
.cta-row{margin-top:30px;display:flex;flex-wrap:wrap;gap:14px}
.meta{margin:22px 0 0;font-size:15px;color:var(--soft)}

/* band */
.band{background:var(--brand);color:#fff}
.band .wrap{display:flex;flex-wrap:wrap;gap:12px 40px;justify-content:space-between;padding-top:26px;padding-bottom:26px;font-weight:700}

/* fit */
.two{margin-top:40px;display:flex;flex-wrap:wrap;gap:24px}
.two > div{flex:1 1 min(440px,100%);min-width:0;border-radius:16px;padding:28px}
.two h3{font-size:22px}
.two ul{margin:16px 0 0;padding-left:22px}
.two li{margin-bottom:6px}
.yes{background:var(--l2-bg)} .yes h3{color:#14532D}
.no{background:var(--l4-bg)} .no h3{color:#7C2D12}

/* level cards */
.levels{margin-top:36px;display:grid;grid-template-columns:repeat(auto-fit,minmax(min(480px,100%),1fr));gap:24px}
.level{border-radius:16px;padding:30px}
.level .head{display:flex;align-items:center;gap:14px}
.level .num{flex:none;width:44px;height:44px;border-radius:999px;color:#fff;font-weight:700;font-size:20px;display:flex;align-items:center;justify-content:center}
.level .title{font-size:24px;font-weight:700;color:var(--brand);line-height:1.2}
.level .info{font-size:14px;color:var(--muted)}
.level p{margin:18px 0 0;font-weight:500}
.level ul{margin:12px 0 0;padding-left:22px}
.level li{margin-bottom:6px}
.level .foot{margin-top:20px;display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px}
.level .price{font-size:22px;font-weight:700;color:var(--ink)}
.c1{background:var(--l1-bg)} .c1 .num{background:var(--l1)}
.c2{background:var(--l2-bg)} .c2 .num{background:var(--l2)}
.c3{background:var(--l3-bg)} .c3 .num{background:var(--l3)}
.c4{background:var(--l4-bg)} .c4 .num{background:var(--l4)}

/* inside */
.panel{background:var(--panel);margin-top:56px}
.panel .wrap{padding-top:72px;padding-bottom:72px}
.tags{margin-top:32px;display:grid;grid-template-columns:repeat(auto-fit,minmax(min(190px,100%),1fr));gap:16px}
.tag{background:#fff;border-radius:14px;padding:20px}
.tag b{display:inline-block;padding:4px 10px;border-radius:6px;color:#fff;font-size:13px;letter-spacing:.05em}
.tag p{margin:10px 0 0;font-size:15px;color:var(--muted)}
.t1 b{background:var(--l1)}.t2 b{background:var(--l2)}.t3 b{background:var(--l3)}.t4 b{background:var(--l4)}.t5 b{background:var(--l5)}
.includes{margin-top:24px;display:grid;grid-template-columns:repeat(auto-fit,minmax(min(320px,100%),1fr));gap:14px 32px}
.includes div{padding-left:18px;border-left:4px solid var(--line)}
.panel h3{margin-top:48px;font-size:24px}

/* samples */
.samples{margin-top:32px;display:grid;grid-template-columns:repeat(auto-fit,minmax(min(300px,100%),1fr));gap:20px}
.sample{border-radius:14px;padding:24px;border-left:6px solid}
.sample .k{font-size:13px;font-weight:700;letter-spacing:.06em}
.sample p{margin:10px 0 0}
.s1{background:var(--l3-bg);border-color:var(--l3)} .s1 .k{color:var(--l3-ink)}
.s2{background:#FDECEC;border-color:var(--l5)} .s2 .k{color:var(--l5)}
.s3{background:var(--l4-bg);border-color:var(--l4)} .s3 .k{color:var(--l4-ink)}

/* shop */
.shop{margin-top:36px;display:grid;grid-template-columns:repeat(auto-fill,minmax(min(220px,100%),1fr));gap:24px}
.product{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden}
.product .cover{background:#F3F4F9;display:block}
.product .cover img{width:100%;aspect-ratio:1/1;object-fit:cover}
.product .body{padding:22px;display:flex;flex-direction:column;flex:1}
.product .lvl{font-size:13px;font-weight:700;letter-spacing:.06em}
.product h3{margin-top:6px;font-size:21px;line-height:1.2}
.product .desc{margin:10px 0 0;font-size:15px;color:var(--muted);flex:1}
.product .row{margin-top:18px;display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap}
.product .price{font-size:24px;font-weight:700}
.p1 .lvl{color:var(--l1-ink)}.p2 .lvl{color:var(--l2-ink)}.p3 .lvl{color:var(--l3-ink)}.p4 .lvl{color:var(--l4-ink)}

.bundle{margin-top:36px;display:flex;flex-wrap:wrap;align-items:center;gap:32px 48px;background:var(--brand);color:#fff;border-radius:22px;padding:36px}
.bundle .img{flex:0 1 300px;min-width:0}
.bundle .img img{border-radius:12px}
.bundle .txt{flex:1 1 min(380px,100%);min-width:0}
.bundle h2,.bundle h3{color:#fff}
.bundle .k{font-size:14px;font-weight:700;letter-spacing:.06em;color:#C9C7F4}
.bundle ul{margin:16px 0 0;padding-left:22px}
.bundle li{margin-bottom:6px}
.bundle .price{margin-top:20px;display:flex;flex-wrap:wrap;align-items:baseline;gap:6px 14px}
.bundle .price strong{font-size:44px;line-height:1}
.bundle .save{display:inline-block;background:#FFF3BF;color:var(--ink);font-weight:700;font-size:15px;padding:3px 10px;border-radius:6px}
.bundle .was{color:#C9C7F4;font-size:16px}
.note{margin:22px 0 0;font-size:15px;color:var(--soft)}

/* about / faq */
.about{display:flex;flex-wrap:wrap;gap:24px 40px}
.about > div:first-child{flex:1 1 min(260px,100%)}
.about > div:last-child{flex:2 1 min(520px,100%);min-width:0}
.about p{margin:0 0 16px;font-size:18px}
.faq{margin-top:32px;display:grid;grid-template-columns:repeat(auto-fit,minmax(min(460px,100%),1fr));gap:28px 48px}
.faq h3{font-size:19px}
.faq p{margin:8px 0 0;font-size:16px;color:var(--muted)}

.final{margin-top:40px;padding-bottom:72px}
.final > div{background:var(--panel);border-radius:22px;padding:56px 32px;text-align:center}
.final p{margin:14px auto 0;max-width:560px;font-size:19px;color:var(--muted)}
.final .btn{margin-top:28px}

/* footer */
footer{background:var(--ink);color:#D5D9E5}
footer .wrap{padding-top:40px;padding-bottom:40px}
footer .brand{font-weight:700;font-size:18px;color:#fff}
footer p{margin:14px 0 0;font-size:14px;line-height:1.7;max-width:860px}
footer a{color:#fff}
footer .links{margin-top:18px;display:flex;flex-wrap:wrap;gap:8px 22px;font-size:15px}
footer .small{color:#AEB4C4}

/* ---- SEO build additions ---- */
.vh{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.crumbs{font-size:14px;color:var(--soft);margin-bottom:18px}
.crumbs a{color:var(--soft)} .crumbs span[aria-current]{color:var(--ink)}
.page-h1{margin-top:6px;font-size:clamp(34px,6vw,52px);line-height:1.08;letter-spacing:-.02em}
.h1sub{margin:10px 0 0;font-size:18px;font-weight:700;color:var(--l1-ink)}
.more{display:inline-block;margin-top:10px;font-weight:700;font-size:15px;text-decoration:none}
.more:hover{text-decoration:underline}
.level .foot .more{margin-top:0}
.product h3 a{color:inherit;text-decoration:none}
.btn.ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.6)}
.btn.ghost:hover{background:rgba(255,255,255,.12);border-color:#fff;color:#fff}
.pd{padding-top:28px;padding-bottom:72px}
.pd-top{display:flex;flex-wrap:wrap;gap:40px 56px;align-items:flex-start}
.pd-img{flex:0 1 420px;min-width:0}
.pd-img img{border-radius:16px;background:#F3F4F9}
.pd-copy{flex:1 1 min(440px,100%);min-width:0}
.pd h1{margin-top:8px;font-size:clamp(32px,5.5vw,48px);line-height:1.08;letter-spacing:-.02em}
.pd .sub{margin:12px 0 0;font-size:20px;font-weight:500;color:var(--muted)}
.pd-copy > p{font-size:18px}
.lvl{font-size:14px;font-weight:700;letter-spacing:.06em;color:var(--brand)}
.lvl.t1{color:var(--l1-ink)}.lvl.t2{color:var(--l2-ink)}.lvl.t3{color:var(--l3-ink)}.lvl.t4{color:var(--l4-ink)}
.buybox{margin-top:24px;display:flex;flex-wrap:wrap;align-items:center;gap:12px 20px}
.buybox .price{font-size:36px;font-weight:700}
.save{display:inline-block;background:#FFF3BF;color:var(--ink);font-weight:700;font-size:15px;padding:3px 10px;border-radius:6px}
.pd-grid{margin-top:56px;display:flex;flex-wrap:wrap;gap:32px 56px}
.pd-grid > div{flex:2 1 min(520px,100%);min-width:0}
.pd-grid > aside{flex:1 1 280px;min-width:0;align-self:flex-start;background:var(--panel);border-radius:16px;padding:24px}
.pd h2{font-size:clamp(24px,4vw,30px);margin-top:36px}
.pd-grid > div > h2:first-child{margin-top:0}
.ticks{margin:16px 0 0;padding:0;list-style:none}
.ticks li{position:relative;padding-left:32px;margin-bottom:10px}
.ticks li::before{content:"✓";position:absolute;left:0;top:0;width:22px;height:22px;border-radius:6px;background:var(--l2-bg);color:var(--l2);font-weight:700;font-size:14px;display:flex;align-items:center;justify-content:center;margin-top:2px}
.facts{margin:0 0 20px}
.facts div{display:flex;justify-content:space-between;gap:16px;padding:10px 0;border-bottom:1px solid var(--line);font-size:15px}
.facts dt{font-weight:700;color:var(--brand)} .facts dd{margin:0;text-align:right;color:var(--muted)}
.honest{margin-top:40px;background:var(--l4-bg);border-left:6px solid var(--l4);border-radius:12px;padding:18px 22px;font-size:15px}
.honest p{margin:0}
.pn{margin-top:36px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-weight:700}
.pn a{text-decoration:none}
.tablewrap{overflow-x:auto;margin-top:18px}
table.set{width:100%;border-collapse:collapse;font-size:16px}
table.set th,table.set td{text-align:left;padding:12px 10px;border-bottom:1px solid var(--line);vertical-align:top}
table.set th{font-size:14px;color:var(--soft);letter-spacing:.04em}
table.set .small{font-size:14px;color:var(--soft)}
table.set tr.total td{font-weight:700;color:var(--brand);border-bottom:none}
.prose{max-width:780px}
.prose p{font-size:18px}
.prose h2{margin-top:36px}
.avatar{width:120px;height:120px;border-radius:999px;object-fit:cover;margin-bottom:18px;border:4px solid var(--l1-bg)}
.about-hero{display:flex;flex-wrap:wrap;align-items:center;gap:24px 36px;margin-bottom:28px}
.about-hero img{width:220px;height:auto;border-radius:18px;flex:none}
.about-hero > div{flex:1 1 280px;min-width:0}
@media (max-width:600px){.about-hero img{width:160px}}
.byline{display:flex;align-items:center;gap:10px;margin:14px 0 0;font-size:15px;color:var(--soft)}
.byline img{width:32px;height:32px;border-radius:999px}
/* tools & reviews */
.disclose{font-size:14px;color:var(--muted);background:var(--panel);border-radius:10px;padding:12px 16px;margin:0 0 22px}
.verdict{margin-top:24px;background:var(--l2-bg);border-radius:16px;padding:24px;display:flex;flex-direction:column;gap:14px;align-items:flex-start}
.verdict p{margin:0;font-size:18px}
.score{display:flex;align-items:center;gap:10px;font-size:18px}
.stars{font-size:22px;letter-spacing:2px;background:linear-gradient(90deg,#E8A317 var(--p,100%),#D5D9E5 var(--p,100%));-webkit-background-clip:text;background-clip:text;color:transparent}
.tools{margin-top:32px;display:grid;grid-template-columns:repeat(auto-fill,minmax(min(260px,100%),1fr));gap:20px}
.tool{border:1px solid var(--line);border-radius:16px;padding:22px;display:flex;flex-direction:column;gap:8px;align-items:flex-start}
.tool h3{font-size:22px} .tool h3 a{color:inherit;text-decoration:none}
.tool p{margin:0;color:var(--muted);font-size:15px;flex:1}
.tool .btn{margin-top:8px}
.tool.soon{background:var(--panel);border-style:dashed}
.prose ul{font-size:17px}