/* quino.pro /en/ — The Study System pages */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{--tq:#3ECFCF;--gold:#F5C842;--bg:#0a0a0a;--ivory:#F0EADC;--white:#FAFAF8;--grey:rgba(250,250,248,.62);--line:rgba(62,207,207,.14);--card:rgba(255,255,255,.035);--forest:#152E26}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--white);font-family:'DM Sans',sans-serif;font-weight:300;line-height:1.75;overflow-x:clip}
body::before{content:'';position:fixed;inset:0;z-index:0;pointer-events:none;background:radial-gradient(ellipse 70% 50% at 85% 0%,rgba(21,46,38,.75),transparent 70%),radial-gradient(ellipse 50% 40% at 0% 100%,rgba(15,58,58,.35),transparent 70%)}
a{color:inherit}
img{max-width:100%;height:auto;display:block}
.wrap{position:relative;z-index:1;max-width:820px;margin:0 auto;padding:0 24px}
.wide{max-width:1100px}
/* nav */
.en-nav{position:sticky;top:0;z-index:100;background:rgba(10,10,10,.88);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);border-bottom:1px solid var(--line)}
.en-nav .in{max-width:1100px;margin:0 auto;padding:0 24px;min-height:62px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.logo{font-family:'Syne',sans-serif;font-weight:800;font-size:20px;text-decoration:none;letter-spacing:-.5px}
.logo span{color:var(--tq)}
.en-nav ul{display:flex;gap:22px;list-style:none;align-items:center;font-size:14px}
.en-nav ul a{text-decoration:none;color:var(--grey);font-weight:500}
.en-nav ul a:hover{color:var(--tq)}
.en-nav .cta{background:var(--tq);color:#0a0a0a!important;padding:8px 18px;border-radius:100px;font-weight:600}
@media(max-width:860px){.en-nav ul li:not(:last-child){display:none}}
/* article */
.crumb{font-size:13px;color:var(--grey);padding-top:28px}
.crumb a{color:var(--grey);text-decoration:none}.crumb a:hover{color:var(--tq)}
h1{font-family:'Syne',sans-serif;font-weight:800;font-size:clamp(2.1rem,5vw,3.4rem);line-height:1.06;letter-spacing:-.03em;margin:18px 0 14px}
.byline{font-size:13.5px;color:var(--grey);margin-bottom:26px}
h2{font-family:'Syne',sans-serif;font-weight:800;font-size:clamp(1.45rem,3vw,2rem);line-height:1.15;letter-spacing:-.02em;margin:56px 0 16px}
h3{font-family:'Syne',sans-serif;font-weight:800;font-size:1.15rem;line-height:1.3;margin:32px 0 10px;color:var(--white)}
p{color:var(--grey);margin-bottom:16px;font-size:1.02rem}
p strong,li strong,td strong{color:var(--white);font-weight:500}
em{font-style:italic}
article a:not(.btn){color:var(--tq);text-decoration:underline;text-decoration-thickness:1px;text-underline-offset:3px}
ul,ol{color:var(--grey);margin:6px 0 18px 22px;font-size:1rem}
li{margin-bottom:8px;padding-left:4px}
ol li::marker{color:var(--tq);font-family:'Syne',sans-serif;font-weight:800}
ul li::marker{color:var(--tq)}
.table{overflow-x:auto;margin:22px 0 26px;border:1px solid var(--line);border-radius:14px}
table{width:100%;border-collapse:collapse;font-size:.92rem;min-width:520px}
th{background:rgba(62,207,207,.07);color:var(--tq);text-align:left;padding:12px 14px;font-weight:500;font-size:.74rem;letter-spacing:.08em;text-transform:uppercase}
td{padding:12px 14px;border-top:1px solid var(--line);color:var(--grey);vertical-align:top}
.answer{background:linear-gradient(135deg,rgba(21,46,38,.9),rgba(21,46,38,.45));border:1px solid rgba(62,207,207,.22);border-radius:18px;padding:22px 24px;margin:8px 0 28px}
.answer p{color:rgba(250,250,248,.82);margin:0}
.cta-box{position:relative;background:#0d0d0d;border:1px solid rgba(245,200,66,.28);border-left:3px solid var(--gold);border-radius:18px;padding:26px 26px 22px;margin:34px 0;box-shadow:0 18px 40px rgba(0,0,0,.35)}
.cta-box p{color:rgba(250,250,248,.75)}
.cta-box p:first-child strong{font-family:'Syne',sans-serif;font-size:1.15rem}
.cta-box a{display:inline-block;background:var(--gold);color:#0a0a0a!important;text-decoration:none!important;padding:12px 24px;border-radius:100px;font-weight:600;margin-top:4px}
.note p{font-size:.88rem}
hr{border:none;border-top:1px solid var(--line);margin:40px 0}
pre,code{font-family:ui-monospace,monospace;font-size:.88em}
/* author + related */
.author{display:flex;gap:16px;align-items:flex-start;background:var(--card);border:1px solid var(--line);border-radius:16px;padding:20px;margin:28px 0}
.author img{width:64px;height:64px;border-radius:50%;object-fit:cover;flex:none}
.updated{display:inline-block;font-size:12px;letter-spacing:.12em;text-transform:uppercase;color:var(--tq);border:1px solid var(--line);border-radius:100px;padding:5px 12px}
/* landing */
.hero{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center;padding:40px 0 24px}
.hero .sub{font-family:'Syne',sans-serif;font-weight:800;font-size:clamp(1.3rem,2.6vw,1.8rem);line-height:1.2;color:var(--tq);margin-bottom:14px}
.hero .support{font-size:13px;letter-spacing:.14em;text-transform:uppercase;color:var(--gold);margin-bottom:18px;font-weight:500}
.price-line{font-size:.95rem;color:var(--grey);margin:18px 0 20px}
.price-line b{font-family:'Syne',sans-serif;font-size:1.9rem;color:var(--white);margin-right:10px}
.btn{display:inline-flex;align-items:center;gap:8px;background:var(--gold);color:#0a0a0a;text-decoration:none;padding:15px 30px;border-radius:100px;font-weight:600;font-size:1rem;transition:transform .2s,box-shadow .2s}
.btn:hover{transform:translateY(-2px);box-shadow:0 14px 30px rgba(245,200,66,.25)}
.cover{border-radius:10px;box-shadow:0 30px 80px rgba(0,0,0,.6),0 0 0 1px rgba(255,255,255,.06);transform:rotate(1.5deg)}
@media(max-width:860px){.hero{grid-template-columns:1fr}.cover{max-width:320px;margin:0 auto}}
/* checkout */
.ss-checkout{background:linear-gradient(160deg,rgba(21,46,38,.95),rgba(10,10,10,.95));border:1px solid rgba(62,207,207,.25);border-radius:22px;padding:28px;margin:28px 0}
.ss-checkout h3{margin-top:0}
.ss-consent{display:flex;gap:12px;align-items:flex-start;background:rgba(0,0,0,.3);border:1px solid var(--line);border-radius:14px;padding:14px 16px;margin:16px 0 18px;cursor:pointer;font-size:.92rem;color:rgba(250,250,248,.85);line-height:1.55}
.ss-consent input{width:20px;height:20px;margin-top:2px;accent-color:#3ECFCF;flex:none}
.ss-consent a{color:var(--tq)}
#ss-paypal{max-width:420px;min-height:52px}
.ss-msg{font-size:.9rem;color:var(--grey);margin-top:10px;min-height:1.2em}
.ss-msg--error{color:#ffb4a8}
.ss-done{background:rgba(62,207,207,.08);border:1px solid rgba(62,207,207,.35);border-radius:16px;padding:20px}
.ss-done .btn{margin:10px 0}
.small{font-size:.85rem!important}
/* footer + cookies */
footer{position:relative;z-index:1;border-top:1px solid var(--line);margin-top:80px;padding:36px 24px;text-align:center;background:#080808}
footer p{font-size:.84rem;margin-bottom:10px}
footer .links{display:flex;flex-wrap:wrap;justify-content:center;gap:18px;font-size:.82rem}
footer .links a{color:var(--grey);text-decoration:none}footer .links a:hover{color:var(--tq)}
#cookieBanner{display:none;position:fixed;bottom:0;left:0;right:0;z-index:9999;background:rgba(10,10,10,.98);border-top:1px solid rgba(62,207,207,.18);padding:18px clamp(16px,4vw,56px);gap:14px;align-items:center;justify-content:space-between;flex-wrap:wrap}
#cookieBanner p{font-size:13px;margin:0;flex:1;min-width:220px}
#cookieBanner button{background:#3ECFCF;color:#0a0a0a;border:none;min-height:44px;padding:10px 20px;border-radius:100px;font-family:'Syne',sans-serif;font-weight:700;font-size:13px;cursor:pointer;margin-right:8px}