/* Klavir Úsvit — Nordic carved design system */
:root{
  --forest:#1f3326;
  --forest-dark:#142019;
  --bone:#f4efe3;
  --bone-dim:#e9e1cc;
  --brass:#c9a15a;
  --brass-dim:#a8824a;
  --ink:#1b2420;
  --line:#3c5542;
  --radius:10px;
  --serif:"Iowan Old Style","Palatino Linotype",Georgia,"Times New Roman",serif;
  --sans:"Avenir Next","Segoe UI",Helvetica,Arial,sans-serif;
  --mono:"JetBrains Mono",Consolas,"SF Mono",monospace;
  --maxw:1180px;
  --sp-1:.5rem;--sp-2:1rem;--sp-3:1.5rem;--sp-4:2.5rem;--sp-5:4rem;--sp-6:6rem;
}
*{box-sizing:border-box}
html,body{overflow-x:clip}
html{scroll-behavior:smooth}
body{
  margin:0;font-family:var(--sans);color:var(--ink);background:var(--bone);
  -webkit-font-smoothing:antialiased;line-height:1.55;
}
img{max-width:100%;display:block}
a{color:inherit}
h1,h2,h3,h4{font-family:var(--serif);line-height:1.1;margin:0 0 .5em;font-weight:600}
h1{font-size:clamp(2.4rem,6vw,4.6rem)}
h2{font-size:clamp(1.8rem,3.4vw,2.6rem)}
h3{font-size:clamp(1.3rem,2vw,1.6rem)}
p{margin:0 0 1em}
:focus-visible{outline:3px solid var(--brass);outline-offset:3px;border-radius:4px}
.container{max-width:var(--maxw);margin:0 auto;padding:0 var(--sp-3)}
.visually-hidden{position:absolute !important;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}

/* ===== icon sprite ===== */
.icon{width:1.3em;height:1.3em;stroke:currentColor;fill:none;stroke-width:1.6;vertical-align:-.2em}

/* ===== header ===== */
.site-header{
  position:sticky;top:0;z-index:50;background:var(--forest);color:var(--bone);
  border-bottom:1px solid var(--line);
}
.site-header .container{display:flex;align-items:center;justify-content:space-between;gap:var(--sp-3);height:72px}
.brand{display:flex;align-items:center;gap:.6rem;text-decoration:none;color:var(--bone)}
.brand svg{width:40px;height:40px}
.brand-word{font-family:var(--serif);font-size:1.3rem;letter-spacing:.02em}
.site-nav{display:flex;align-items:center;gap:var(--sp-3)}
.site-nav ul{display:flex;gap:1.4rem;list-style:none;margin:0;padding:0;flex-wrap:wrap}
.site-nav a{text-decoration:none;font-size:.95rem;position:relative;padding:.3rem 0;color:var(--bone-dim)}
.site-nav a::after{content:"";position:absolute;left:0;right:100%;bottom:0;height:2px;background:var(--brass);transition:right .25s ease}
.site-nav a:hover::after,.site-nav a.is-active::after{right:0}
.site-nav a.is-active{color:var(--bone)}
.header-actions{display:flex;align-items:center;gap:1rem}
.cart-link{display:inline-flex;align-items:center;gap:.4rem;text-decoration:none;color:var(--bone)}
.cart-count{display:inline-flex;align-items:center;justify-content:center;min-width:1.5em;height:1.5em;border-radius:50%;background:var(--brass);color:var(--forest-dark);font-size:.75rem;font-weight:700}
.cart-count.bump{animation:bump .35s ease}
@keyframes bump{0%{transform:scale(1)}40%{transform:scale(1.35)}100%{transform:scale(1)}}
.nav-toggle{display:none;background:none;border:1px solid var(--line);border-radius:8px;color:var(--bone);width:44px;height:44px;align-items:center;justify-content:center}

@media (max-width:860px){
  .site-nav{position:fixed;top:72px;left:0;right:0;bottom:0;background:var(--forest);flex-direction:column;align-items:flex-start;padding:var(--sp-3);transform:translateX(-100%);visibility:hidden;transition:transform .3s ease;overflow-y:auto}
  .site-nav.is-open{transform:translateX(0);visibility:visible}
  .site-nav ul{flex-direction:column;gap:1rem;width:100%}
  .site-nav a{display:block;padding:.6rem 0;min-height:44px}
  .nav-toggle{display:flex}
}

/* ===== footer ===== */
.site-footer{background:var(--forest-dark);color:var(--bone-dim);padding:var(--sp-5) 0 var(--sp-3)}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:var(--sp-4)}
.footer-grid>div{min-width:0}
.footer-grid h4{color:var(--bone);font-family:var(--sans);font-size:.85rem;text-transform:uppercase;letter-spacing:.08em}
.footer-grid ul{list-style:none;margin:0;padding:0;display:grid;gap:.5rem}
.footer-grid a{text-decoration:none;color:var(--bone-dim)}
.footer-grid a:hover{color:var(--brass)}
.newsletter-form{display:flex;gap:.5rem;flex-wrap:wrap}
.newsletter-form input[type=email]{flex:1;min-width:0}
.footer-bottom{border-top:1px solid var(--line);margin-top:var(--sp-4);padding-top:var(--sp-3);display:flex;justify-content:space-between;flex-wrap:wrap;gap:1rem;font-size:.85rem}
@media (max-width:760px){.footer-grid{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}}

/* ===== buttons ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;position:relative;overflow:hidden;
  padding:.85rem 1.7rem;border-radius:999px;border:1px solid transparent;font-weight:600;cursor:pointer;
  text-decoration:none;font-size:.95rem;min-height:44px;isolation:isolate;transition:color .3s ease,border-color .3s ease}
.btn::before{content:"";position:absolute;inset:0;left:-100%;width:100%;background:currentColor;opacity:.12;transition:left .35s ease;z-index:-1}
.btn:hover::before{left:0}
.btn-primary{background:var(--forest);color:var(--bone)}
.btn-primary::before{background:var(--brass)}
.btn-primary:hover{color:var(--forest-dark)}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--ink)}
.btn-brass{background:var(--brass);color:var(--forest-dark)}
.btn-sm{padding:.55rem 1.1rem;font-size:.85rem;min-height:38px}
.btn[disabled]{opacity:.5;cursor:not-allowed}

/* ===== reveal / motion ===== */
.reveal{opacity:1;transform:none}
@media (prefers-reduced-motion:no-preference){
  .reveal{opacity:0;transform:translateY(24px);clip-path:inset(0 0 12% 0);transition:opacity .7s ease,transform .7s ease,clip-path .7s ease}
  .reveal.in-view{opacity:1;transform:none;clip-path:inset(0 0 0 0)}
  .reveal-delay-1{transition-delay:.1s}.reveal-delay-2{transition-delay:.2s}.reveal-delay-3{transition-delay:.3s}
}

/* ===== hero marquee ===== */
.marquee{overflow:hidden;background:var(--forest-dark);color:var(--bone-dim);border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:.9rem 0}
.marquee-track{display:flex;gap:2.5rem;white-space:nowrap;width:max-content;animation:marquee 28s linear infinite}
.marquee span{font-family:var(--serif);font-size:1rem;letter-spacing:.08em;text-transform:uppercase;color:var(--brass)}
@keyframes marquee{from{transform:translateX(0)}to{transform:translateX(-50%)}}
@media (prefers-reduced-motion:reduce){.marquee-track{animation:none}}

/* ===== page hero (inner pages) ===== */
.page-hero{background:var(--forest);color:var(--bone);padding:var(--sp-5) 0 var(--sp-4);position:relative;overflow:hidden}
.page-hero .container{position:relative;z-index:1}
.page-hero p{color:var(--bone-dim);max-width:46ch}
.breadcrumbs{display:flex;gap:.4rem;flex-wrap:wrap;font-size:.85rem;color:var(--bone-dim);margin-bottom:1rem}
.breadcrumbs a{text-decoration:none;color:var(--bone-dim)}
.breadcrumbs a:hover{color:var(--brass)}

/* ===== prose / legal pages ===== */
.prose{max-width:68ch;margin:0 auto}
.prose h2{margin-top:2.2em}
.prose h3{margin-top:1.6em}
.prose ul,.prose ol{padding-left:1.2em}
.prose li{margin-bottom:.4em}
.legal-toc{background:var(--bone-dim);border-radius:var(--radius);padding:var(--sp-3);margin:0 auto var(--sp-4);max-width:68ch}
.legal-toc h2{font-size:1rem;text-transform:uppercase;letter-spacing:.06em;font-family:var(--sans)}
.legal-toc ol{margin:0;padding-left:1.2em}
.legal-toc a{text-decoration:none}
.legal-toc a:hover{color:var(--brass-dim)}

/* ===== notices ===== */
.notice{border-radius:var(--radius);padding:var(--sp-2) var(--sp-3);border:1px solid var(--line);background:var(--bone-dim);margin:1rem 0}
.notice--success{border-color:#2f6b45;background:#e3efe6}
.notice--error{border-color:#8a3a2d;background:#f6e4df}

/* ===== forms ===== */
.form-grid{display:grid;gap:1.1rem;grid-template-columns:repeat(2,1fr)}
.form-grid .field.full{grid-column:1/-1}
@media (max-width:620px){.form-grid{grid-template-columns:1fr}}
.field{display:flex;flex-direction:column;gap:.35rem}
.field label{font-size:.85rem;font-weight:600}
.field input,.field select,.field textarea{
  font:inherit;padding:.75rem .9rem;border:1px solid var(--line);border-radius:8px;background:#fff;color:var(--ink);
  accent-color:var(--brass);min-height:44px
}
.field textarea{min-height:120px;resize:vertical}
.field-error{color:#8a3a2d;font-size:.8rem;margin:0}
.field.has-error input,.field.has-error textarea{border-color:#8a3a2d}
.field-hp{position:absolute;left:-9999px;opacity:0}

/* ===== faq ===== */
.faq{display:grid;gap:.8rem;max-width:72ch;margin:0 auto}
.faq-item{border:1px solid var(--line);border-radius:var(--radius);padding:.2rem var(--sp-3);background:#fff}
.faq-item summary{cursor:pointer;padding:1rem 0;font-weight:600;list-style:none;display:flex;justify-content:space-between;gap:1rem}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";font-size:1.4rem;color:var(--brass-dim)}
.faq-item[open] summary::after{content:"–"}
.faq-item p{padding-bottom:1rem;color:#4a4f49}

/* ===== product / course grid ===== */
.product-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:var(--sp-3)}
.product-card{background:#fff;border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);display:flex;flex-direction:column;transition:transform .3s ease,box-shadow .3s ease}
.product-card:hover{transform:translateY(-6px);box-shadow:0 14px 28px rgba(31,51,38,.18)}
.product-card .thumb{aspect-ratio:4/3;overflow:hidden}
.product-card .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.product-card:hover .thumb img{transform:scale(1.07)}
.product-card .body{padding:1.1rem 1.2rem;display:flex;flex-direction:column;gap:.4rem;flex:1}
.product-card .price{font-family:var(--serif);font-size:1.2rem;color:var(--brass-dim)}
.product-strip{display:flex;gap:1rem;overflow-x:auto;scroll-snap-type:x mandatory;padding-bottom:.5rem}
.product-strip .product-card{min-width:240px;scroll-snap-align:start}

/* ===== product detail ===== */
.product-detail{display:grid;grid-template-columns:1fr 1fr;gap:var(--sp-4);align-items:start}
@media (max-width:760px){.product-detail{grid-template-columns:1fr}}
.product-detail .media{border-radius:var(--radius);overflow:hidden;aspect-ratio:4/3}
.product-detail .media img{width:100%;height:100%;object-fit:cover}
.product-detail .meta{display:flex;gap:1rem;flex-wrap:wrap;color:#4a4f49;font-size:.9rem}

/* ===== cart / booking ===== */
.cart-table{width:100%;border-collapse:collapse}
.cart-table th,.cart-table td{text-align:left;padding:.8rem .5rem;border-bottom:1px solid var(--line)}
.cart-summary{background:var(--bone-dim);border-radius:var(--radius);padding:var(--sp-3);display:grid;gap:.6rem;max-width:340px;margin-left:auto}
.cart-summary .total{font-size:1.3rem;font-family:var(--serif);display:flex;justify-content:space-between}
.qty-input{width:4rem}

/* ===== contact layout ===== */
.contact-layout{display:grid;grid-template-columns:1fr 1fr;gap:var(--sp-4)}
@media (max-width:760px){.contact-layout{grid-template-columns:1fr}}
.contact-info{display:grid;gap:1rem;align-content:start}
.contact-info .row{display:flex;gap:.7rem;align-items:flex-start}

/* ===== piano feature ===== */
.piano-feature{background:var(--forest);color:var(--bone);border-radius:var(--radius);padding:var(--sp-4);position:relative;overflow:hidden}
.piano{display:flex;gap:4px;margin-top:1.4rem;user-select:none}
.piano-key{flex:1;height:120px;background:var(--bone);border:1px solid var(--line);border-radius:0 0 6px 6px;cursor:pointer;transition:transform .08s ease,background .15s ease;display:flex;align-items:flex-end;justify-content:center;padding-bottom:.4rem;font-size:.7rem;color:var(--forest-dark)}
.piano-key:hover{background:var(--bone-dim)}
.piano-key.is-pressed{transform:translateY(4px);background:var(--brass)}

/* ===== cookie banner ===== */
.cookie-banner{position:fixed;left:1rem;right:1rem;bottom:1rem;z-index:100;background:var(--forest-dark);color:var(--bone);border-radius:var(--radius);padding:1.2rem 1.4rem;display:flex;gap:1rem;flex-wrap:wrap;align-items:center;justify-content:space-between;max-width:900px;margin:0 auto;box-shadow:0 10px 30px rgba(0,0,0,.3)}
.cookie-banner p{margin:0;font-size:.9rem;color:var(--bone-dim)}
.cookie-banner a{color:var(--brass);text-decoration:underline}
.cookie-actions{display:flex;gap:.6rem;flex-wrap:wrap}
.cookie-banner .btn-ghost{border-color:var(--bone-dim);color:var(--bone)}

/* ===== toast ===== */
.toast{position:fixed;bottom:1.2rem;right:1.2rem;background:var(--forest-dark);color:var(--bone);padding:.8rem 1.2rem;border-radius:8px;opacity:0;transform:translateY(10px);transition:opacity .25s,transform .25s;z-index:200;max-width:300px}
.toast.is-visible{opacity:1;transform:none}

/* ===== utilities ===== */
.section{padding:var(--sp-6) 0}
.section-sm{padding:var(--sp-4) 0}
.grid{display:grid;gap:var(--sp-3)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
@media (max-width:760px){.grid-2,.grid-3{grid-template-columns:1fr}}
.text-center{text-align:center}
.mt-0{margin-top:0}.mb-0{margin-bottom:0}
.gap-1{gap:.5rem}.gap-2{gap:1rem}.gap-3{gap:1.5rem}
.divider{width:100%;height:40px}

/* COMPONENTS: .class - what it is
.container - centered max-width wrapper
.site-header - sticky header bar
.brand - logo + wordmark link
.site-nav - main navigation (mobile off-canvas via .is-open)
.nav-toggle - mobile menu button
.cart-link / .cart-count - header cart indicator (bump on change)
.site-footer / .footer-grid / .newsletter-form / .footer-bottom - footer layout
.btn / .btn-primary / .btn-ghost / .btn-brass / .btn-sm - button variants with fill-sweep hover
.reveal / .in-view / .reveal-delay-1..3 - scroll reveal animation hooks
.marquee / .marquee-track - hero scrolling word strip
.page-hero - inner page hero band
.breadcrumbs - page breadcrumb trail
.prose - readable long-form legal/content column
.legal-toc - table of contents box for legal pages
.notice / .notice--success / .notice--error - inline alert boxes
.form-grid / .field / .field-error / .field-hp - form layout, field wrapper, error text, honeypot
.faq / .faq-item - details/summary accordion
.product-grid / .product-card / .product-strip - catalog grid, card, mobile scroll-snap strip
.product-detail - two-column product/service detail layout
.cart-table / .cart-summary / .qty-input - booking basket table and summary box
.contact-layout / .contact-info - contact page two-column layout
.piano-feature / .piano / .piano-key - signature "Zahraj si Úsvit" interactive keyboard
.cookie-banner / .cookie-actions - GDPR cookie consent banner
.toast - transient confirmation message
.section / .section-sm - vertical rhythm spacing wrappers
.grid / .grid-2 / .grid-3 - simple responsive grid helpers
.icon - inline SVG sprite icon sizing
*/