/* =====================================================================
   UPSKILL10X — storefront styles (landing, course pages, auth, checkout)
   Same tokens as the app: white + blue, orange as the accent.
===================================================================== */
:root{
  --blue-900:#002c6b; --blue-800:#00419e; --blue-700:#0056d2; --blue-600:#1a6fe0; --blue-400:#5b96ea; --blue-200:#a8c8f5; --blue-50:#eef4fd;
  --orange-600:#ea580c; --orange-500:#f97316; --orange-400:#fb923c; --orange-100:#fff1e6;
  --yellow:#ffd23f; --green:#16a34a; --green-50:#e9f8ef;
  --ink:#16181d; --ink-2:#3d4350; --muted:#6b7280; --muted-2:#9aa1ad;
  --bg:#ffffff; --bg-2:#f7f9fc; --bg-3:#eef1f8;
  --line:rgba(0,86,210,.16); --line-2:rgba(16,24,40,.09);
  --radius:16px; --radius-sm:12px;
  --shadow-1:0 1px 2px rgba(16,24,40,.06),0 1px 3px rgba(16,24,40,.08);
  --shadow-2:0 12px 32px -12px rgba(0,44,107,.22);
  --shadow-3:0 24px 60px -20px rgba(0,44,107,.35);
  --ease:cubic-bezier(.16,.84,.44,1);
  --ff:'Inter',system-ui,-apple-system,'Segoe UI',sans-serif;
  --wrap:1200px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
[hidden]{display:none!important}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--ff);background:var(--bg);color:var(--ink);font-size:15px;line-height:1.5;-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
img{max-width:100%;display:block}
input,textarea,select{font-family:inherit;font-size:inherit}
h1,h2,h3,h4{letter-spacing:-.02em;line-height:1.15;font-weight:800}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 20px}
.icon{width:18px;height:18px;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:700;font-size:14.5px;padding:12px 20px;border-radius:12px;transition:transform .15s var(--ease),box-shadow .2s,background .2s,border-color .2s;white-space:nowrap}
.btn:active{transform:scale(.97)}
.btn-primary{background:var(--blue-700);color:#fff;box-shadow:0 10px 24px -10px rgba(0,86,210,.7)}
.btn-primary:hover{background:var(--blue-800)}
.btn-accent{background:var(--orange-500);color:#fff;box-shadow:0 10px 24px -10px rgba(234,88,12,.7)}
.btn-accent:hover{background:var(--orange-600)}
.btn-dark{background:var(--ink);color:#fff}
.btn-dark:hover{background:#000}
.btn-yellow{background:var(--yellow);color:var(--ink)}
.btn-ghost{background:#fff;color:var(--ink);border:1.5px solid var(--line-2)}
.btn-ghost:hover{border-color:var(--blue-400);color:var(--blue-700)}
.btn-link{color:var(--blue-700);font-weight:700;padding:0}
.btn-sm{padding:9px 14px;font-size:13.5px;border-radius:10px}
.btn-lg{padding:15px 26px;font-size:15.5px;border-radius:14px}
.btn-block{width:100%}
.btn[disabled]{opacity:.6;pointer-events:none}

/* ---------- Offer strip (top) ---------- */
.offer-strip{background:var(--yellow);color:var(--ink);font-size:13.5px;position:relative;z-index:41}
.offer-strip .wrap{display:flex;align-items:center;gap:14px;min-height:48px;padding-top:6px;padding-bottom:6px}
.offer-gift{width:32px;height:32px;border-radius:9px;background:var(--ink);display:flex;align-items:center;justify-content:center;font-size:17px;flex-shrink:0}
.offer-text{flex:1;min-width:0}
.offer-text b{font-weight:800}
.offer-text s{opacity:.55;margin-left:4px}
.offer-timer{display:flex;align-items:center;gap:3px;font-variant-numeric:tabular-nums;font-weight:700}
.offer-timer b{background:var(--ink);color:#fff;border-radius:6px;padding:3px 6px;font-size:13px;min-width:26px;text-align:center}
.offer-close{width:28px;height:28px;border-radius:8px;display:flex;align-items:center;justify-content:center;opacity:.6}
.offer-close:hover{opacity:1;background:rgba(0,0,0,.06)}
@media (max-width:720px){
  .offer-strip{font-size:12.5px}
  .offer-gift,.offer-timer-label,.ot-long{display:none}
  .offer-strip .wrap{gap:8px;padding-left:14px;padding-right:8px}
  .offer-timer b{padding:3px 4px;min-width:22px;font-size:12px}
  .offer-strip .btn{padding:8px 11px;font-size:12.5px}
}

/* ---------- Header ---------- */
.site-header{position:sticky;top:0;z-index:40;background:rgba(255,255,255,.92);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--line-2)}
.site-header .wrap{display:flex;align-items:center;gap:22px;height:68px}
.brand img{height:30px;width:auto}
.nav-links{display:flex;align-items:center;gap:4px}
.nav-link{display:inline-flex;align-items:center;gap:5px;padding:9px 12px;border-radius:10px;font-weight:600;font-size:14.5px;color:var(--ink-2);position:relative}
.nav-link:hover{background:var(--bg-2);color:var(--blue-700)}
.nav-link .icon{width:15px;height:15px}
.dropdown{position:relative}
.dropdown-menu{position:absolute;top:calc(100% + 8px);left:0;width:340px;background:#fff;border:1px solid var(--line-2);border-radius:16px;box-shadow:var(--shadow-3);padding:8px;opacity:0;visibility:hidden;transform:translateY(-6px);transition:.18s var(--ease)}
.dropdown:hover .dropdown-menu,.dropdown:focus-within .dropdown-menu{opacity:1;visibility:visible;transform:none}
.dd-item{display:flex;align-items:center;gap:12px;padding:9px 10px;border-radius:11px}
.dd-item:hover{background:var(--bg-2)}
.dd-thumb{width:42px;height:42px;border-radius:10px;overflow:hidden;position:relative;flex-shrink:0}
.dd-item b{font-size:13.5px;display:block;line-height:1.25}
.dd-item span{font-size:12px;color:var(--muted)}
.search{flex:1;max-width:420px;display:flex;align-items:center;gap:9px;background:var(--bg-2);border:1.5px solid transparent;border-radius:99px;padding:0 16px;height:44px;transition:.2s}
.search:focus-within{background:#fff;border-color:var(--blue-400)}
.search input{border:none;outline:none;background:none;width:100%;color:var(--ink)}
.search .icon{color:var(--muted-2)}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:8px}
.menu-btn{display:none;width:42px;height:42px;border-radius:11px;align-items:center;justify-content:center}
.menu-btn:hover{background:var(--bg-2)}
@media (max-width:980px){
  .nav-links,.search.desktop{display:none}
  .menu-btn{display:flex}
  .header-actions .btn-ghost{display:none}
  .site-header .wrap{gap:10px}
}
@media (max-width:420px){ .brand img{height:24px} .header-actions .btn{padding:9px 12px} }
.mobile-menu{position:fixed;inset:0;z-index:60;background:rgba(10,20,40,.45);opacity:0;visibility:hidden;transition:.2s}
.mobile-menu.open{opacity:1;visibility:visible}
.mobile-menu-panel{position:absolute;top:0;right:0;bottom:0;width:min(86vw,360px);background:#fff;padding:18px;display:flex;flex-direction:column;gap:6px;transform:translateX(100%);transition:transform .28s var(--ease);overflow-y:auto}
.mobile-menu.open .mobile-menu-panel{transform:none}
.mobile-menu-panel .search{max-width:none;margin:8px 0 10px}
.mm-link{padding:13px 12px;border-radius:12px;font-weight:600}
.mm-link:hover{background:var(--bg-2)}
.mm-label{font-size:11.5px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--muted-2);padding:12px 12px 4px}

/* ---------- Sections ---------- */
section{padding:72px 0}
.sec-head{max-width:720px;margin-bottom:34px}
.sec-head.center{margin-left:auto;margin-right:auto;text-align:center}
.eyebrow{display:inline-flex;align-items:center;gap:7px;font-size:12px;font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:var(--blue-700);margin-bottom:12px}
.eyebrow.orange{color:var(--orange-600)}
.sec-head h2{font-size:clamp(26px,3.4vw,38px);margin-bottom:12px}
.sec-head p{color:var(--muted);font-size:16px}
.tint{background:var(--bg-2)}
.hl{color:var(--blue-700)}
.hl-o{color:var(--orange-500)}

/* ---------- Course cards (Udemy-style) ---------- */
.thumb{position:relative;aspect-ratio:16/9;border-radius:12px;overflow:hidden;background:var(--bg-3)}
.thumb img{width:100%;height:100%;object-fit:cover}
.thumb-art{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;overflow:hidden}
.thumb-art svg{width:34%;height:auto;max-width:76px;position:relative;z-index:1;filter:drop-shadow(0 6px 14px rgba(0,0,0,.18))}
.thumb-o1{position:absolute;right:-18%;top:-30%;width:62%;aspect-ratio:1;border-radius:50%;background:rgba(255,255,255,.14)}
.thumb-o2{position:absolute;left:-12%;bottom:-38%;width:52%;aspect-ratio:1;border-radius:50%;background:rgba(255,255,255,.09)}
.thumb-tag{position:absolute;top:9px;left:9px;font-size:10.5px;font-weight:800;letter-spacing:.04em;text-transform:uppercase;background:rgba(0,0,0,.38);backdrop-filter:blur(4px);color:#fff;padding:4px 9px;border-radius:99px;z-index:2}
.course-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:22px}
.c-card{display:flex;flex-direction:column;gap:10px;border-radius:var(--radius);transition:transform .2s var(--ease)}
.c-card:hover{transform:translateY(-3px)}
.c-card:hover .thumb{box-shadow:var(--shadow-2)}
.c-card h3{font-size:16px;line-height:1.3;letter-spacing:-.01em}
.c-card .sub{font-size:13.5px;color:var(--muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.c-meta{display:flex;flex-wrap:wrap;gap:4px 10px;font-size:12.5px;color:var(--muted)}
.c-meta span{display:inline-flex;align-items:center;gap:4px}
.c-meta .icon{width:13px;height:13px}
.price-row{display:flex;align-items:baseline;gap:8px;flex-wrap:wrap}
.price{font-weight:800;font-size:18px}
.mrp{color:var(--muted-2);text-decoration:line-through;font-size:14px}
.off{font-size:12px;font-weight:800;color:var(--green);background:var(--green-50);padding:2px 7px;border-radius:6px}
.chip-row{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:24px}
.chip{padding:9px 16px;border-radius:99px;border:1.5px solid var(--line-2);font-weight:600;font-size:13.5px;background:#fff;transition:.15s}
.chip:hover{border-color:var(--blue-400)}
.chip.active{background:var(--ink);border-color:var(--ink);color:#fff}
.empty{color:var(--muted);text-align:center;padding:40px 0}
.skeleton{background:linear-gradient(90deg,var(--bg-3),#f4f6fb,var(--bg-3));background-size:200% 100%;animation:sk 1.2s infinite;border-radius:12px}
@keyframes sk{to{background-position:-200% 0}}

/* ---------- Pricing ---------- */
.plans{display:grid;grid-template-columns:1fr 1.15fr;gap:22px;max-width:920px;margin:0 auto;align-items:stretch}
.plan{border:1.5px solid var(--line-2);border-radius:22px;background:#fff;display:flex;flex-direction:column;overflow:hidden;position:relative}
.plan-head{padding:22px 24px 0}
.plan-head h3{font-size:20px;margin-bottom:4px}
.plan-head p{color:var(--muted);font-size:14px}
.plan-price{padding:18px 24px 6px;display:flex;align-items:baseline;gap:10px;flex-wrap:wrap}
.plan-price .big{font-size:42px;font-weight:900;letter-spacing:-.04em}
.plan-price small{color:var(--muted);font-weight:600}
.plan ul{list-style:none;padding:12px 24px 22px;display:flex;flex-direction:column;gap:11px;flex:1}
.plan li{display:flex;gap:10px;font-size:14.5px;color:var(--ink-2)}
.plan li svg{color:var(--green);margin-top:2px}
.plan .plan-cta{padding:0 24px 24px}
.plan.featured{border:none;box-shadow:var(--shadow-3)}
.plan.featured .plan-banner{background:linear-gradient(120deg,var(--blue-800),var(--blue-600));color:#fff;text-align:center;font-weight:800;padding:14px;font-size:16px}
.ribbon{position:absolute;top:18px;right:-44px;transform:rotate(45deg);background:var(--yellow);color:var(--ink);font-weight:800;font-size:12.5px;padding:6px 52px}
.plan-timer{display:flex;align-items:center;justify-content:center;gap:8px;margin-top:14px;font-size:12.5px;color:var(--muted);font-weight:600}
.plan-timer .offer-timer b{background:var(--ink);color:#fff}
@media (max-width:760px){ .plans{grid-template-columns:1fr} .plan.featured{order:-1} }

/* ---------- FAQ ---------- */
.faq{max-width:820px;margin:0 auto;display:flex;flex-direction:column;gap:10px}
.faq-item{border:1px solid var(--line-2);border-radius:16px;background:#fff;overflow:hidden}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:18px 20px;text-align:left;font-weight:700;font-size:15.5px}
.faq-q svg{transition:transform .25s var(--ease);color:var(--muted)}
.faq-item.open .faq-q svg{transform:rotate(180deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s var(--ease)}
.faq-a p{padding:0 20px 18px;color:var(--ink-2);font-size:14.5px}

/* ---------- Page header band (courses / pricing) ---------- */
.page-band{background:linear-gradient(120deg,#0b1730 0%,var(--blue-900) 55%,var(--blue-800) 100%);color:#fff;padding:46px 0 40px}
.page-band h1{font-size:clamp(28px,4vw,42px);margin-bottom:10px}
.page-band p{color:#d5e1f5;font-size:16.5px;max-width:640px}
.page-band .search{background:#fff;max-width:520px;margin-top:22px}

/* ---------- Footer ---------- */
footer{background:#0b1730;color:#c8d2e4;padding:56px 0 28px;font-size:14px}
.f-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:32px}
.f-logo{background:#fff;border-radius:12px;padding:10px 14px;display:inline-block;margin-bottom:16px}
.f-logo img{height:26px}
footer h4{color:#fff;font-size:14px;margin-bottom:14px;letter-spacing:0}
footer ul{list-style:none;display:flex;flex-direction:column;gap:9px}
footer a:hover{color:#fff}
.f-bottom{margin-top:40px;padding-top:20px;border-top:1px solid rgba(255,255,255,.1);display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;color:#8d9ab3;font-size:13px}
@media (max-width:860px){ .f-grid{grid-template-columns:1fr 1fr} }
@media (max-width:520px){ .f-grid{grid-template-columns:1fr} }

/* ---------- Sticky bottom buy bar (mobile, like Log2Base2) ---------- */
.buy-bar{position:fixed;left:0;right:0;bottom:0;z-index:35;background:var(--blue-700);color:#fff;transform:translateY(110%);transition:transform .3s var(--ease);padding-bottom:env(safe-area-inset-bottom,0)}
.buy-bar.show{transform:none}
.buy-bar .wrap{display:flex;align-items:center;gap:14px;min-height:66px}
.buy-bar .bb-text{flex:1;min-width:0;font-size:14px;line-height:1.3}
.buy-bar .bb-text b{color:var(--yellow)}
.buy-bar .bb-price{font-size:20px;font-weight:800}
.buy-bar .bb-price s{font-size:13px;opacity:.6;font-weight:600;margin-left:6px}

/* ---------- Modal ---------- */
.modal-bg{position:fixed;inset:0;z-index:80;background:rgba(10,20,40,.6);display:flex;align-items:center;justify-content:center;padding:16px;opacity:0;visibility:hidden;transition:.2s}
.modal-bg.show{opacity:1;visibility:visible}
.modal-box{background:#fff;border-radius:20px;width:100%;max-width:820px;overflow:hidden;box-shadow:var(--shadow-3)}
.modal-head{display:flex;align-items:center;gap:12px;padding:16px 18px;border-bottom:1px solid var(--line-2)}
.modal-head h3{font-size:16px;flex:1}
.x-btn{width:34px;height:34px;border-radius:10px;display:flex;align-items:center;justify-content:center}
.x-btn:hover{background:var(--bg-2)}
.player{background:#000;aspect-ratio:16/9;width:100%}
.player video{width:100%;height:100%;display:block}

/* ---------- Forms ---------- */
.field{display:flex;flex-direction:column;gap:6px;margin-bottom:14px}
.field label{font-size:13px;font-weight:700;color:var(--ink-2)}
.input{width:100%;height:48px;border-radius:12px;border:1.5px solid var(--line-2);background:#fff;padding:0 14px;color:var(--ink);outline:none;transition:.15s}
.input:focus{border-color:var(--blue-600);box-shadow:0 0 0 4px rgba(0,86,210,.1)}
.input[readonly]{background:var(--bg-2);color:var(--ink-2)}
.field .err{display:none;font-size:12.5px;color:#dc2626;font-weight:600}
.field.invalid .input{border-color:#dc2626}
.field.invalid .err{display:block}
.alert{display:none;align-items:flex-start;gap:9px;padding:12px 14px;border-radius:12px;font-size:13.5px;font-weight:600;margin-bottom:14px}
.alert.show{display:flex}
.alert.bad{background:#fef2f2;color:#b91c1c}
.alert.ok{background:var(--green-50);color:#15803d}

.reveal{opacity:0;transform:translateY(16px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){ .reveal{opacity:1;transform:none} *{animation-duration:.01ms!important;transition-duration:.01ms!important} }