/* EduPaper AI premium public site: isolated additions only */
:root{--prem-bg:#071525;--prem-card:#10263c;--prem-blue:#4ea4ff;--prem-cyan:#6edbfa;--prem-purple:#aa85ff;--prem-white:#f8fbff;--prem-muted:#c2d2e4}
.prem-reveal{opacity:0;transform:translateY(20px);transition:opacity .65s ease,transform .65s ease}.prem-reveal.visible{opacity:1;transform:none}
.prem-nav-extra{background:rgba(110,219,250,.09)!important;border:1px solid rgba(110,219,250,.16)!important}
.prem-hero{position:relative;isolation:isolate;overflow:hidden;background:radial-gradient(ellipse at 85% 20%,rgba(99,102,241,.23),transparent 50%),linear-gradient(125deg,#061827,#102341 60%,#181b45);border:1px solid #315071;border-radius:30px;padding:clamp(28px,5vw,58px);box-shadow:0 30px 90px #02081777;margin-bottom:24px}
.prem-hero:before{content:'';position:absolute;inset:-50%;z-index:-1;background:conic-gradient(from 0deg at 75% 30%,transparent 0deg,#47b2f50d 75deg,transparent 150deg);animation:prem-glow 18s linear infinite}
@keyframes prem-glow{to{transform:rotate(360deg)}}
.prem-kicker{color:#97eaff;font-size:.78rem;font-weight:850;letter-spacing:.13em;text-transform:uppercase}
.prem-h1{color:#fff;font-size:clamp(2.5rem,5.7vw,4.7rem);line-height:1.05;letter-spacing:-.055em;margin:13px 0 19px;font-weight:850}
.prem-gradient{background:linear-gradient(100deg,#8bdeff,#ad90ff 60%,#f3a1d9);-webkit-background-clip:text;background-clip:text;color:transparent}
.prem-intro{color:#cbdced;font-size:clamp(1rem,1.6vw,1.2rem);line-height:1.75;max-width:720px}
.prem-buttons{display:flex;flex-wrap:wrap;gap:12px;margin:25px 0}.prem-button{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:12px 21px;border-radius:12px;text-decoration:none;font-weight:800;border:1px solid #6b80a4;color:#f8fbff;background:#ffffff0d;transition:transform .2s,background .2s}.prem-button:hover{transform:translateY(-3px);background:#ffffff26}.prem-button.primary{background:linear-gradient(110deg,#49cbff,#8075ff);color:#061323;border:0}
.prem-row{display:grid;grid-template-columns:1.05fr .95fr;gap:28px;align-items:center}.prem-photo{display:block;width:100%;border-radius:18px;border:1px solid #b8cafa45;box-shadow:0 20px 60px #02071599;transition:transform .4s,box-shadow .4s}.prem-photo:hover{transform:translateY(-5px) scale(1.012);box-shadow:0 28px 70px #020715aa}
.prem-photo-shell{padding:10px;background:#ffffff12;border:1px solid #ffffff24;border-radius:24px;box-shadow:0 25px 60px #0007}
.prem-section{margin:26px 0;padding:clamp(23px,4vw,38px);background:linear-gradient(135deg,#ffffff0c,#ffffff06);border:1px solid #ffffff25;border-radius:26px}
.prem-section h2{font-size:clamp(1.7rem,3.5vw,2.65rem);letter-spacing:-.035em;margin:8px 0 15px;color:#fff}.prem-section p{color:#c3d2e3;line-height:1.7}
.prem-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin-top:20px}.prem-tile{min-width:0;padding:22px;border-radius:19px;background:linear-gradient(160deg,#1b3153,#10253a);border:1px solid #ffffff21;transition:transform .22s,border-color .22s}.prem-tile:hover{transform:translateY(-4px);border-color:#85d3fd80}.prem-tile h3{color:white;margin:13px 0 8px;font-size:1.12rem}.prem-tile p{margin:0;font-size:.91rem}.prem-icon{display:inline-grid;place-items:center;width:43px;height:43px;border-radius:13px;background:linear-gradient(135deg,#317aff,#8764e7);color:white;font-weight:900}
.prem-links{display:flex;gap:14px;flex-wrap:wrap;margin-top:20px}.prem-links a{color:#9be9ff;text-decoration:none;font-weight:750}.prem-links a:hover{text-decoration:underline}
.prem-faq details{border:1px solid #ffffff22;background:#0d2239;border-radius:14px;margin:10px 0;overflow:hidden}.prem-faq summary{cursor:pointer;padding:18px 21px;font-weight:800;color:white;list-style:none;display:flex;justify-content:space-between;gap:16px}.prem-faq summary::-webkit-details-marker{display:none}.prem-faq summary:after{content:'+';font-size:1.35rem;color:#7fdaff}.prem-faq details[open] summary:after{content:'−'}.prem-faq details>div{padding:0 21px 17px;color:#c3d2e3;line-height:1.7}
.prem-callout{border-left:3px solid #74d9ff;padding:14px 18px;background:#4abfff13;border-radius:0 10px 10px 0;color:#d9edfc;line-height:1.65}
.prem-footer{display:flex;gap:18px;flex-wrap:wrap;align-items:center;justify-content:space-between;border-top:1px solid #ffffff24;padding:25px 0;color:#b5c6d7;font-size:.85rem}.prem-footer a{color:#cfe5ff;text-decoration:none}.prem-footer a:hover{text-decoration:underline}
.prem-bullets{color:#c3d2e3;line-height:1.8;padding-left:20px}
.prem-video{display:flex;align-items:center;justify-content:center;min-height:160px;border-radius:22px;background:radial-gradient(circle at 50% 60%,#6454c977,transparent 50%),linear-gradient(120deg,#142b4e,#1b1743);border:1px solid #8b80ca66;text-decoration:none;color:white;gap:14px;font-size:1.15rem;font-weight:850;transition:transform .25s}.prem-video:hover{transform:translateY(-4px)}.prem-play{width:57px;height:57px;display:grid;place-items:center;border-radius:50%;background:linear-gradient(135deg,#49c8ff,#8b6cff);color:#08121f;font-size:1.45rem}
@media(max-width:880px){.prem-row,.prem-grid{grid-template-columns:1fr}.prem-photo-shell{max-width:760px}.prem-h1{font-size:clamp(2.2rem,9vw,4rem)}}@media(max-width:600px){.prem-hero{padding:26px 20px}.prem-section{padding:23px 19px}.prem-buttons .prem-button{width:100%}}
@media(prefers-reduced-motion:reduce){.prem-reveal{opacity:1;transform:none}.prem-hero:before{animation:none}.prem-photo,.prem-button,.prem-tile,.prem-video{transition:none!important}}


/* EDUPAPER_PUBLIC_MENU_REPAIR_V3 */
.ep-nav{display:flex!important;align-items:center!important;justify-content:flex-end!important;flex-wrap:wrap!important;gap:2px 13px!important;width:auto!important;max-width:100%;font:600 13px/1.4 Inter,system-ui,Arial,sans-serif!important}
.ep-nav a{color:#e0e9f9!important;background:transparent!important;border:0!important;box-shadow:none!important;border-radius:6px!important;min-height:0!important;padding:8px 1px!important;text-decoration:none!important;white-space:nowrap!important;transition:color .2s ease,transform .2s ease!important;font:inherit!important}
.ep-nav a:hover,.ep-nav a[aria-current="page"]{color:#8de6ff!important;transform:translateY(-1px)!important}
.ep-nav a+a::before{content:'|';color:#6c88ac;display:inline-block;margin-right:13px;opacity:.85;font-weight:400;pointer-events:none}
.ep-nav a:focus-visible,.ep-menu-toggle:focus-visible{outline:2px solid #8ee6ff!important;outline-offset:4px!important}
/* Align premium and legacy headers without changing their structure. */
header.prem-head,header.eg-topbar,header.topbar{gap:14px!important}
header.eg-topbar .eg-brand{flex:0 1 auto}
header.eg-topbar .eg-brand>div{max-width:225px} /* preserve existing page title and subheading */
.ep-menu-toggle{display:none;border:1px solid #8bb2d066;background:#172845;color:#fff;border-radius:11px;padding:10px 15px;font:700 14px/1.3 Inter,system-ui,Arial,sans-serif;cursor:pointer;align-items:center;justify-content:center}
@keyframes ep-slide-in-v3{from{opacity:0;transform:translateX(-23px)}to{opacity:1;transform:none}}
.prem-hero .prem-h1,.hero-text>h1,.hero-inner>h2,.hero>div>h1{animation:ep-slide-in-v3 .7s cubic-bezier(.2,.7,.2,1) both}
.prem-reveal.visible h2{animation:ep-slide-in-v3 .65s ease both}
@media(max-width:1220px){
 header.prem-head,header.eg-topbar,header.topbar{display:flex!important;align-items:center!important;flex-wrap:wrap!important;justify-content:space-between!important}
 .ep-menu-toggle{display:inline-flex!important;margin-left:auto}
 #navToggle{display:inline-flex!important;margin-left:auto}
 .ep-nav{display:none!important;width:100%!important;flex-basis:100%!important;flex-direction:column!important;align-items:stretch!important;justify-content:flex-start!important;gap:0!important;padding:8px!important;background:#0e2036!important;border:1px solid #8bb2d04d!important;border-radius:13px!important;order:20}
 .ep-nav.ep-open,.ep-nav.open{display:flex!important}
 .ep-nav a{display:block!important;width:100%!important;padding:12px 14px!important;border-bottom:1px solid #ffffff16!important;white-space:normal!important}
 .ep-nav a+a::before{display:none!important}
 .ep-nav a:last-child{border-bottom:0!important}
 .topbar .ep-menu-toggle{display:none!important} /* homepage's existing toggle and authentication logic remain */
}
@media(max-width:640px){header.prem-head img{max-width:62vw!important}header.eg-topbar img{max-width:62vw!important}}
@media(prefers-reduced-motion:reduce){.prem-hero .prem-h1,.hero-text>h1,.hero-inner>h2,.hero>div>h1,.prem-reveal.visible h2{animation:none!important}.ep-nav a{transition:none!important}}
/* END EDUPAPER_PUBLIC_MENU_REPAIR_V3 */