/* ============================================================
   AinoCalc — Premium storefront
   Design language: editorial type, generous space, dark/light
   contrast, one electric accent. Mobile-first.
   ============================================================ */

:root{
  --ink:#0a0a0b;
  --ink-2:#1c1c1f;
  --paper:#faf9f7;
  --paper-2:#f1efec;
  --line:rgba(10,10,11,.10);
  --line-2:rgba(255,255,255,.12);
  --muted:#6b6b70;
  --muted-2:#a3a3aa;
  --accent:#335cff;
  --accent-2:#c8f24e;
  --accent-ink:#0a0a0b;
  --danger:#e5484d;
  --radius:18px;
  --radius-lg:28px;
  --shadow-sm:0 1px 2px rgba(10,10,11,.05),0 4px 16px rgba(10,10,11,.06);
  --shadow-lg:0 24px 64px rgba(10,10,11,.16);
  --font:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;
  --font-display:'Space Grotesk','Inter',sans-serif;
  --header-h:64px;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--font);color:var(--ink);background:var(--paper);line-height:1.6;font-size:16px;overflow-x:hidden}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer;border:none;background:none;color:inherit}
input,select{font:inherit;color:inherit}
::selection{background:var(--accent);color:#fff}

.container{width:min(1180px,100% - 40px);margin-inline:auto}
.container-narrow{width:min(760px,100% - 40px)}

/* ---------- Announcement ---------- */
.announce{background:var(--ink);color:#fff;text-align:center;font-size:13px;font-weight:500;letter-spacing:.04em;padding:9px 16px;text-transform:uppercase}

/* ---------- Header ---------- */
.site-header{position:sticky;top:0;z-index:100;background:rgba(250,249,247,.82);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--line);transition:box-shadow .25s}
.site-header.scrolled{box-shadow:var(--shadow-sm)}
.header-inner{height:var(--header-h);display:flex;align-items:center;gap:20px}
.logo{display:flex;align-items:center;gap:9px;font-family:var(--font-display);font-weight:700;font-size:19px;letter-spacing:-.02em}
.main-nav{display:none;gap:28px;margin-inline:auto}
.main-nav a{font-size:14.5px;font-weight:500;color:var(--ink-2);position:relative;padding:4px 0}
.main-nav a::after{content:"";position:absolute;left:0;bottom:-2px;width:0;height:2px;background:var(--ink);transition:width .2s}
.main-nav a:hover::after{width:100%}
.header-actions{display:flex;align-items:center;gap:10px;margin-left:auto}
.lang-switch select{border:1px solid var(--line);background:transparent;border-radius:99px;padding:6px 10px;font-size:13px;font-weight:600;appearance:none;cursor:pointer}
.cart-btn{position:relative;display:grid;place-items:center;width:40px;height:40px;border-radius:12px;border:1px solid var(--line);transition:border-color .2s,background .2s}
.cart-btn:hover{border-color:var(--ink)}
.cart-count{position:absolute;top:-5px;right:-5px;min-width:18px;height:18px;padding:0 4px;background:var(--accent);color:#fff;border-radius:99px;font-size:11px;font-weight:700;display:grid;place-items:center}
.header-cta{display:none}
.menu-toggle{display:flex;flex-direction:column;justify-content:center;gap:6px;width:40px;height:40px;border-radius:12px;border:1px solid var(--line)}
.menu-toggle span{display:block;width:18px;height:2px;background:var(--ink);margin-inline:auto;transition:transform .25s,opacity .2s}
body.menu-open .menu-toggle span:first-child{transform:translateY(4px) rotate(45deg)}
body.menu-open .menu-toggle span:last-child{transform:translateY(-4px) rotate(-45deg)}

/* Mobile nav */
@media (max-width:900px){
  body.menu-open .main-nav{display:flex;position:fixed;inset:var(--header-h) 0 auto 0;background:var(--paper);flex-direction:column;padding:18px 22px 26px;gap:4px;border-bottom:1px solid var(--line);box-shadow:var(--shadow-lg);z-index:99}
  body.menu-open .main-nav a{font-size:19px;font-weight:600;padding:12px 4px;border-bottom:1px solid var(--line)}
}
@media (min-width:901px){
  .main-nav{display:flex}
  .menu-toggle{display:none}
  .header-cta{display:inline-flex}
}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:600;border-radius:99px;transition:transform .15s,box-shadow .2s,background .2s,border-color .2s;white-space:nowrap;user-select:none}
.btn:active{transform:scale(.97)}
.btn-primary{background:var(--ink);color:#fff;padding:14px 26px;font-size:15px}
.btn-primary:hover{background:#232327;box-shadow:var(--shadow-lg)}
.btn-accent{background:var(--accent-2);color:var(--accent-ink);padding:14px 26px;font-size:15px}
.btn-accent:hover{box-shadow:0 8px 28px rgba(200,242,78,.4)}
.btn-secondary{background:transparent;color:var(--ink);border:1.5px solid var(--ink);padding:12.5px 24px;font-size:15px}
.btn-secondary:hover{background:var(--ink);color:#fff}
.btn-ghost{background:transparent;color:#fff;border:1.5px solid var(--line-2);padding:12.5px 24px;font-size:15px}
.btn-ghost:hover{border-color:#fff;background:rgba(255,255,255,.06)}
.btn-sm{padding:10px 18px;font-size:14px}
.btn-lg{padding:16px 32px;font-size:16px}
.btn-block{width:100%}

/* ---------- Hero ---------- */
.hero{position:relative;background:var(--ink);color:#fff;overflow:hidden}
.hero-glow{position:absolute;inset:-40% -20% auto;height:130%;background:radial-gradient(600px 420px at 75% 25%,rgba(51,92,255,.28),transparent 65%),radial-gradient(500px 400px at 20% 80%,rgba(200,242,78,.10),transparent 60%);pointer-events:none}
.hero-grid{position:relative;display:grid;gap:48px;padding:72px 0 88px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;letter-spacing:.10em;text-transform:uppercase;color:var(--muted)}
.eyebrow-light{color:var(--muted-2)}
.pulse-dot{width:8px;height:8px;border-radius:50%;background:var(--accent-2);box-shadow:0 0 0 0 rgba(200,242,78,.6);animation:pulse 2s infinite}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(200,242,78,.5)}70%{box-shadow:0 0 0 10px rgba(200,242,78,0)}100%{box-shadow:0 0 0 0 rgba(200,242,78,0)}}
.hero-title{font-family:var(--font-display);font-size:clamp(42px,8vw,76px);line-height:1.03;letter-spacing:-.035em;font-weight:700;margin:18px 0 20px}
.hero-title em{font-style:normal;color:var(--accent-2)}
.hero-sub{font-size:clamp(16px,2.2vw,19px);color:rgba(255,255,255,.72);max-width:34em;margin-bottom:32px}
.hero-ctas{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:40px}
.hero-stats{display:flex;gap:0;border-top:1px solid var(--line-2);padding-top:24px}
.hero-stats div{flex:1;display:flex;flex-direction:column}
.hero-stats div + div{border-left:1px solid var(--line-2);padding-left:18px;margin-left:18px}
.hero-stats strong{font-family:var(--font-display);font-size:clamp(20px,3vw,28px);letter-spacing:-.02em}
.hero-stats span{font-size:12.5px;color:var(--muted-2);margin-top:2px}
.hero-visual{position:relative;align-self:center;max-width:520px;width:100%;margin-inline:auto}
.hero-visual img{border-radius:var(--radius-lg);box-shadow:var(--shadow-lg)}
.hero-chip{position:absolute;background:rgba(255,255,255,.94);color:var(--ink);font-size:13px;font-weight:600;padding:9px 15px;border-radius:99px;box-shadow:var(--shadow-lg);animation:float 5s ease-in-out infinite}
.chip-1{top:8%;left:-6px}
.chip-2{bottom:10%;right:-6px;animation-delay:2.4s}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-9px)}}

@media (min-width:961px){
  .hero-grid{grid-template-columns:1.05fr .95fr;align-items:center;padding:96px 0 110px}
}

/* Marquee */
.marquee{border-top:1px solid var(--line-2);overflow:hidden;padding:13px 0;background:rgba(255,255,255,.02)}
.marquee-track{display:flex;gap:28px;align-items:center;white-space:nowrap;animation:scroll 34s linear infinite;font-size:13px;letter-spacing:.08em;text-transform:uppercase;color:rgba(255,255,255,.55);font-weight:500}
.marquee-track i{font-style:normal;color:var(--accent-2)}
@keyframes scroll{from{transform:translateX(0)}to{transform:translateX(-50%)}}

/* ---------- Sections ---------- */
.section{padding:84px 0}
.section-dark{background:var(--ink);color:#fff}
.section-tint{background:var(--paper-2)}
.section-head{max-width:640px;margin:0 auto 52px;text-align:center}
.section-title{font-family:var(--font-display);font-size:clamp(30px,5vw,46px);letter-spacing:-.03em;line-height:1.1;margin:14px 0 16px;font-weight:700}
.title-light{color:#fff}
.section-sub{color:var(--muted);font-size:17px}
.sub-light{color:var(--muted-2)}

/* ---------- Products ---------- */
.product-grid{display:grid;gap:26px}
@media (min-width:761px){.product-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1025px){.product-grid{grid-template-columns:repeat(3,1fr)}}
.product-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;display:flex;flex-direction:column;transition:transform .25s,box-shadow .25s}
.product-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.product-card.featured{border:1.5px solid var(--ink);position:relative}
.product-media{position:relative;aspect-ratio:1/1;background:var(--paper-2)}
.product-media img{width:100%;height:100%;object-fit:cover}
.badge{position:absolute;top:14px;left:14px;background:#fff;border:1px solid var(--line);font-size:12px;font-weight:700;letter-spacing:.03em;padding:6px 12px;border-radius:99px;text-transform:uppercase}
.badge-accent{background:var(--accent-2);border-color:transparent;color:var(--accent-ink)}
.badge-save{background:var(--ink);color:#fff;border-color:transparent}
.product-body{padding:24px 24px 26px;display:flex;flex-direction:column;flex:1}
.product-name{font-family:var(--font-display);font-size:24px;letter-spacing:-.02em}
.product-tag{font-size:13.5px;color:var(--muted);margin:6px 0 16px}
.product-feats{list-style:none;display:grid;gap:9px;margin-bottom:22px;flex:1}
.product-feats li{font-size:14.5px;padding-left:26px;position:relative;color:var(--ink-2)}
.product-feats li::before{content:"";position:absolute;left:0;top:4px;width:15px;height:15px;border-radius:50%;background:var(--accent-2) url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="%230a0a0b" stroke-width="3.4" stroke-linecap="round" stroke-linejoin="round"><path d="M5 13l4 4 10-10"/></svg>') center/9px no-repeat}
.product-foot{border-top:1px solid var(--line);padding-top:18px}
.price{display:flex;align-items:baseline;gap:10px;margin-bottom:14px}
.price-now{font-family:var(--font-display);font-size:30px;font-weight:700;letter-spacing:-.02em}
.price-was{color:var(--muted-2);text-decoration:line-through;font-size:15px}
.product-actions{display:grid;grid-template-columns:1fr 1fr;gap:10px}

/* Pay row */
.pay-row{display:flex;flex-direction:column;align-items:center;gap:14px;margin-top:44px}
.pay-label{font-size:13px;color:var(--muted);text-transform:uppercase;letter-spacing:.08em;font-weight:600}
.pay-icons{display:flex;flex-wrap:wrap;justify-content:center;gap:10px}
.pay-icon{border:1px solid var(--line);border-radius:8px;background:#fff;padding:7px 13px;font-size:12px;font-weight:800;letter-spacing:.02em;color:var(--ink-2);font-style:italic}
.pay-paypal{color:#003087;font-style:italic}
.pay-icon[title="Apple Pay"]{font-family:-apple-system,sans-serif;font-style:normal}
.pay-icon[title="Google Pay"]{color:#4285F4;font-style:normal;font-weight:700}

/* ---------- Demo ---------- */
.demo-wrap{display:grid;gap:28px}
@media (min-width:961px){.demo-wrap{grid-template-columns:1fr .9fr;align-items:start}}
.calc-shell{background:var(--ink-2);border:1px solid var(--line-2);border-radius:var(--radius-lg);padding:22px;box-shadow:var(--shadow-lg)}
.calc-screen{background:#0d1a12;border-radius:14px;border:1px solid rgba(200,242,78,.15);padding:18px;margin-bottom:16px}
.calc-mode{font-size:10.5px;letter-spacing:.2em;color:#6f8f76;font-weight:600;margin-bottom:6px}
.calc-input{font-family:var(--font-display);font-size:clamp(30px,6vw,44px);font-weight:700;color:var(--accent-2);letter-spacing:-.02em;min-height:1.2em;word-break:break-all;text-align:right}
.calc-expr{font-size:13px;color:#57705d;text-align:right;min-height:1.4em;margin-top:4px}
.calc-notebar{display:flex;gap:10px;margin-bottom:10px}
.calc-notebar input{flex:1;background:rgba(255,255,255,.05);border:1px solid var(--line-2);border-radius:12px;padding:11px 14px;color:#fff;font-size:14px;min-width:0}
.calc-notebar input::placeholder{color:var(--muted-2)}
.calc-search{display:flex;align-items:center;gap:10px;background:rgba(255,255,255,.05);border:1px solid var(--line-2);border-radius:12px;padding:0 14px;margin-bottom:16px;color:var(--muted-2)}
.calc-search input{flex:1;background:none;border:none;padding:11px 0;color:#fff;font-size:14px;min-width:0}
.calc-search input::placeholder{color:var(--muted-2)}
.calc-keys{display:grid;grid-template-columns:repeat(4,1fr);gap:8px}
.key{background:rgba(255,255,255,.06);border:1px solid var(--line-2);color:#fff;border-radius:12px;padding:14px 0;font-size:17px;font-weight:600;transition:background .15s,transform .1s;touch-action:manipulation}
.key:active{transform:scale(.94)}
.key:hover{background:rgba(255,255,255,.12)}
.key-fn{font-size:13.5px;color:var(--accent-2);background:rgba(200,242,78,.06);border-color:rgba(200,242,78,.18)}
.key-op{background:rgba(51,92,255,.16);border-color:rgba(51,92,255,.3)}
.key-eq{background:var(--accent-2);color:var(--accent-ink);border-color:transparent}
.demo-hint{font-size:13px;color:var(--muted-2);margin-top:14px;text-align:center}
.demo-hint kbd{background:rgba(255,255,255,.1);border-radius:5px;padding:1px 7px;font-family:inherit}

.notes-panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:22px;min-height:300px}
.notes-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}
.notes-head h3{font-family:var(--font-display);font-size:19px;letter-spacing:-.02em}
.notes-count{background:var(--accent);color:#fff;min-width:26px;height:26px;padding:0 8px;border-radius:99px;font-size:12.5px;font-weight:700;display:grid;place-items:center}
.notes-list{list-style:none;display:grid;gap:10px;max-height:420px;overflow:auto}
.note-item{display:flex;justify-content:space-between;gap:12px;background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:12px 15px;font-size:14px}
.note-item mark{background:rgba(51,92,255,.16);color:var(--accent);border-radius:3px;padding:0 2px;font-weight:600}
.note-val{font-family:var(--font-display);font-weight:700;color:var(--accent);white-space:nowrap}
.notes-empty{color:var(--muted);font-size:14px;text-align:center;padding:30px 0}

/* ---------- AI ---------- */
.ai-wrap{max-width:760px;margin:0 auto}
.ai-shell{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:22px;box-shadow:var(--shadow-sm)}
.ai-log{display:grid;gap:16px;max-height:380px;overflow:auto;margin-bottom:16px;min-height:120px}
.ai-msg{display:flex;gap:12px;align-items:flex-start}
.ai-avatar{flex-shrink:0;width:34px;height:34px;border-radius:10px;background:var(--ink);color:var(--accent-2);display:grid;place-items:center;font-size:12px;font-weight:800;letter-spacing:.03em}
.ai-user{flex-direction:row-reverse}
.ai-user .ai-avatar{background:var(--accent);color:#fff}
.ai-bubble{background:var(--paper);border:1px solid var(--line);border-radius:4px 16px 16px 16px;padding:12px 16px;font-size:14.5px;max-width:85%}
.ai-user .ai-bubble{background:var(--ink);color:#fff;border-color:transparent;border-radius:16px 4px 16px 16px}
.ai-bubble .steps{display:block;margin-top:8px;padding-top:8px;border-top:1px dashed var(--line);color:var(--muted);font-size:13px}
.ai-bubble .ans{font-family:var(--font-display);font-weight:700;color:var(--accent);font-size:17px}
.ai-input{display:flex;gap:10px}
.ai-input input{flex:1;border:1.5px solid var(--line);border-radius:14px;padding:13px 16px;font-size:15px;background:var(--paper)}
.ai-input input:focus{outline:none;border-color:var(--ink)}
.ai-suggest{display:flex;flex-wrap:wrap;align-items:center;gap:9px;margin-top:16px;justify-content:center}
.ai-suggest span{font-size:13px;color:var(--muted);font-weight:600}
.suggest-chip{border:1px solid var(--line);background:#fff;border-radius:99px;padding:8px 15px;font-size:13px;font-weight:500;transition:border-color .2s,background .2s}
.suggest-chip:hover{border-color:var(--ink);background:var(--paper)}

/* ---------- Reviews ---------- */
.review-grid{display:grid;gap:22px}
@media (min-width:761px){.review-grid{grid-template-columns:repeat(3,1fr)}}
.review-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:28px;display:flex;flex-direction:column;gap:14px}
.stars{color:#f5a623;font-size:17px;letter-spacing:.12em}
.review-card blockquote{font-size:15.5px;line-height:1.65;flex:1}
.review-card figcaption{display:flex;flex-direction:column;border-top:1px solid var(--line);padding-top:14px}
.review-card figcaption strong{font-size:14.5px}
.review-card figcaption span{font-size:13px;color:var(--muted)}

/* ---------- FAQ ---------- */
.faq-list{display:grid;gap:12px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden}
.faq-item summary{cursor:pointer;padding:20px 24px;font-weight:600;font-size:16px;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:16px}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";font-size:22px;font-weight:400;color:var(--muted);transition:transform .2s}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-item p{padding:0 24px 22px;color:var(--muted);font-size:15px;max-width:60ch}

/* ---------- Final CTA ---------- */
.final-cta{background:var(--ink);color:#fff;text-align:center;position:relative;overflow:hidden}
.final-cta::before{content:"";position:absolute;inset:0;background:radial-gradient(500px 300px at 50% 110%,rgba(51,92,255,.35),transparent 70%)}
.final-cta .container{position:relative}
.final-title{font-family:var(--font-display);font-size:clamp(32px,5.5vw,52px);letter-spacing:-.03em;line-height:1.08;margin-bottom:16px}
.final-sub{color:var(--muted-2);margin-bottom:34px;font-size:16px}

/* ---------- Footer ---------- */
.site-footer{background:var(--ink);color:#fff;border-top:1px solid var(--line-2);padding:64px 0 30px}
.footer-grid{display:grid;gap:38px;margin-bottom:48px}
@media (min-width:761px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr}}
.footer-brand p{color:var(--muted-2);font-size:14px;margin-top:14px;max-width:30em}
.footer-col{display:flex;flex-direction:column;gap:10px}
.footer-col h4{font-size:13px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted-2);margin-bottom:6px}
.footer-col a{font-size:14.5px;color:rgba(255,255,255,.82);transition:color .15s}
.footer-col a:hover{color:#fff}
.footer-bottom{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;border-top:1px solid var(--line-2);padding-top:24px;font-size:13px;color:var(--muted-2)}
.footer-secure{display:inline-flex;align-items:center;gap:7px}

/* ---------- Cart drawer ---------- */
.cart-overlay{position:fixed;inset:0;background:rgba(10,10,11,.5);z-index:200;backdrop-filter:blur(3px)}
.cart-drawer{position:fixed;top:0;right:0;bottom:0;width:min(420px,100%);background:#fff;z-index:201;display:flex;flex-direction:column;transform:translateX(100%);transition:transform .3s cubic-bezier(.3,.9,.3,1);box-shadow:var(--shadow-lg)}
.cart-drawer.open{transform:translateX(0)}
.cart-head{display:flex;align-items:center;justify-content:space-between;padding:20px 22px;border-bottom:1px solid var(--line)}
.cart-head h3{font-family:var(--font-display);font-size:20px;letter-spacing:-.02em}
.cart-close{width:36px;height:36px;border-radius:10px;border:1px solid var(--line);font-size:15px}
.cart-items{flex:1;overflow:auto;padding:16px 22px;display:grid;gap:14px;align-content:start}
.cart-item{display:grid;grid-template-columns:74px 1fr;gap:14px;border:1px solid var(--line);border-radius:14px;padding:12px}
.cart-item img{width:74px;height:74px;object-fit:cover;border-radius:10px;background:var(--paper-2)}
.cart-item-info{display:flex;flex-direction:column;gap:6px;min-width:0}
.cart-item-name{font-weight:600;font-size:14.5px}
.cart-item-price{font-family:var(--font-display);font-weight:700;color:var(--accent)}
.qty-row{display:flex;align-items:center;gap:10px;margin-top:auto}
.qty-btn{width:28px;height:28px;border:1px solid var(--line);border-radius:8px;font-weight:700;display:grid;place-items:center}
.qty-btn:hover{border-color:var(--ink)}
.qty-val{font-weight:600;font-size:14px;min-width:20px;text-align:center}
.cart-item-remove{font-size:12px;color:var(--muted);text-decoration:underline;margin-left:auto}
.cart-empty{text-align:center;color:var(--muted);padding:50px 20px;font-size:15px}
.cart-foot{border-top:1px solid var(--line);padding:18px 22px 22px}
.cart-total-row{display:flex;justify-content:space-between;font-size:15px;margin-bottom:8px}
.cart-total-row strong{font-family:var(--font-display);font-size:18px}
.cart-shipping{color:#1a9e57}
.cart-shipping strong{color:#1a9e57;font-size:14px;letter-spacing:.06em}
#checkoutBtn{margin:12px 0 10px}
.cart-secure{text-align:center;font-size:12.5px;color:var(--muted)}

/* ---------- Toast ---------- */
.toast{position:fixed;bottom:24px;left:50%;transform:translate(-50%,80px);background:var(--ink);color:#fff;padding:13px 22px;border-radius:14px;font-size:14.5px;font-weight:500;z-index:300;transition:transform .3s,opacity .3s;opacity:0;box-shadow:var(--shadow-lg);max-width:calc(100vw - 40px);text-align:center}
.toast.show{transform:translate(-50%,0);opacity:1}
.toast .t-accent{color:var(--accent-2);font-weight:700}

/* ============================================================
   CHECKOUT PAGE
   ============================================================ */
.checkout-page{padding:36px 0 80px}
.checkout-grid{display:grid;gap:32px}
@media (min-width:961px){.checkout-grid{grid-template-columns:1.15fr .85fr;align-items:start}}
.co-title{font-family:var(--font-display);font-size:clamp(26px,4vw,36px);letter-spacing:-.03em;margin-bottom:6px}
.co-sub{color:var(--muted);font-size:15px;margin-bottom:28px}
.co-steps{display:grid;gap:26px}
.co-step{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:24px}
.co-step h3{font-family:var(--font-display);font-size:18px;letter-spacing:-.01em;margin-bottom:18px;display:flex;align-items:center;gap:10px}
.co-step-num{width:26px;height:26px;border-radius:99px;background:var(--ink);color:#fff;font-size:13px;display:grid;place-items:center;font-family:var(--font);font-weight:700}
.form-grid{display:grid;gap:14px}
@media (min-width:600px){.form-grid.two{grid-template-columns:1fr 1fr}}
.field label{display:block;font-size:13px;font-weight:600;margin-bottom:6px;color:var(--ink-2)}
.field label .req{color:var(--danger)}
.field input,.field select{width:100%;border:1.5px solid var(--line);border-radius:12px;padding:12px 14px;font-size:15px;background:var(--paper);transition:border-color .15s}
.field input:focus,.field select:focus{outline:none;border-color:var(--ink);background:#fff}
.field .field-err{display:none;color:var(--danger);font-size:12.5px;margin-top:5px}
.field.invalid input{border-color:var(--danger)}
.field.invalid .field-err{display:block}

/* Payment methods */
.pay-methods{display:grid;gap:10px}
.pay-method{display:flex;align-items:center;gap:14px;border:1.5px solid var(--line);border-radius:14px;padding:14px 16px;cursor:pointer;transition:border-color .15s,background .15s}
.pay-method:hover{border-color:var(--ink-2)}
.pay-method input{accent-color:var(--ink);width:17px;height:17px}
.pay-method.selected{border-color:var(--ink);background:var(--paper-2)}
.pm-info{flex:1;min-width:0}
.pm-name{font-weight:600;font-size:14.5px}
.pm-desc{font-size:12.5px;color:var(--muted)}
.pm-tag{font-size:11px;background:var(--accent-2);color:var(--accent-ink);padding:3px 9px;border-radius:99px;font-weight:700}

/* Order summary */
.co-summary{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:24px;position:sticky;top:84px}
.co-summary h3{font-family:var(--font-display);font-size:19px;margin-bottom:18px;letter-spacing:-.01em}
.sum-items{display:grid;gap:14px;margin-bottom:18px}
.sum-item{display:grid;grid-template-columns:58px 1fr auto;gap:12px;align-items:center}
.sum-item img{width:58px;height:58px;object-fit:cover;border-radius:10px;background:var(--paper-2)}
.sum-name{font-size:14px;font-weight:600}
.sum-qty{font-size:12.5px;color:var(--muted)}
.sum-price{font-family:var(--font-display);font-weight:700;font-size:15px}
.sum-row{display:flex;justify-content:space-between;font-size:14.5px;color:var(--muted);padding:7px 0}
.sum-row.free strong{color:#1a9e57}
.sum-total{display:flex;justify-content:space-between;border-top:1px solid var(--line);margin-top:10px;padding-top:16px;font-size:16px;font-weight:600;align-items:baseline}
.sum-total strong{font-family:var(--font-display);font-size:26px;letter-spacing:-.02em}
.place-order{margin-top:18px}
.co-trust{display:grid;gap:8px;margin-top:18px;padding-top:18px;border-top:1px solid var(--line)}
.co-trust div{display:flex;gap:10px;align-items:center;font-size:13px;color:var(--muted)}

/* Order success */
.order-success{max-width:560px;margin:48px auto;text-align:center;background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:48px 32px}
.os-icon{width:72px;height:72px;border-radius:50%;background:var(--accent-2);display:grid;place-items:center;margin:0 auto 22px}
.os-icon svg{width:34px;height:34px}
.os-title{font-family:var(--font-display);font-size:30px;letter-spacing:-.03em;margin-bottom:10px}
.os-sub{color:var(--muted);font-size:15px;margin-bottom:8px}
.os-num{display:inline-block;background:var(--paper-2);border:1px dashed var(--ink-2);border-radius:10px;padding:9px 20px;font-family:var(--font-display);font-weight:700;letter-spacing:.06em;margin:14px 0 24px}
.os-actions{display:grid;gap:10px;max-width:300px;margin:0 auto}
.os-note{font-size:13px;color:var(--muted);margin-top:20px}

/* Responsive fine-tuning */
@media (max-width:600px){
  .section{padding:60px 0}
  .product-actions{grid-template-columns:1fr}
  .hero-stats div + div{padding-left:12px;margin-left:12px}
  .hero-chip{font-size:12px;padding:7px 12px}
  .calc-keys{gap:6px}
  .key{padding:13px 0;font-size:16px}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms !important;transition-duration:.01ms !important}
  html{scroll-behavior:auto}
}

/* ---------- checkout extras ---------- */
.co-secure-badge{display:inline-flex;align-items:center;gap:5px;font-size:12px;font-weight:700;color:#1a9e57;border:1px solid rgba(26,158,87,.3);border-radius:99px;padding:6px 12px}
.pay-paypal-tag{background:#003087;color:#fff;font-size:11px;padding:3px 9px;border-radius:99px;font-weight:700}
.sum-tax-note{font-size:12px;color:var(--muted-2);margin-top:6px}
.co-secure-note{display:flex;align-items:center;gap:7px;font-size:12.5px;color:var(--muted);margin-top:14px}
.checkout-page .header-inner .header-actions{margin-left:auto}
.checkout-page .logo{margin-right:auto}
.place-order{margin-top:26px}