/* =========================================================
   Šachový klub Karviná — statická prezentace
   Paleta: inkoust / krém / zlatá, šachovnicové motivy
   ========================================================= */

:root{
  --ink:      #12100e;
  --ink-2:    #1a1613;
  --panel:    #201b16;
  --line:     rgba(240,230,210,.12);
  --cream:    #f2e9d8;
  --cream-2:  #cbbfa8;
  --muted:    #9a8f7c;
  --gold:     #c8a04b;
  --gold-2:   #e2c479;
  --wood:     #3a2b1d;
  --radius:   14px;
  --wrap:     1140px;
  --serif:    "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, "Times New Roman", serif;
  --sans:     ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

*,*::before,*::after{ box-sizing:border-box; }

html{ scroll-behavior:smooth; scroll-padding-top:84px; }

body{
  margin:0;
  background:var(--ink);
  color:var(--cream);
  font:16px/1.7 var(--sans);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

img{ max-width:100%; display:block; }
a{ color:inherit; }

.wrap{ width:min(100% - 2.5rem, var(--wrap)); margin-inline:auto; }

.vh{
  position:absolute; width:1px; height:1px; overflow:hidden;
  clip:rect(0 0 0 0); clip-path:inset(50%); white-space:nowrap;
}

.skip{
  position:absolute; left:-9999px; top:0; z-index:100;
  background:var(--gold); color:#1a1410; padding:.7rem 1.1rem; font-weight:700;
}
.skip:focus{ left:1rem; top:1rem; }

:focus-visible{ outline:2px solid var(--gold-2); outline-offset:3px; border-radius:4px; }

/* ---------- typografie ---------- */

.h2{
  font-family:var(--serif);
  font-size:clamp(1.9rem, 4vw, 2.9rem);
  line-height:1.15; font-weight:600; letter-spacing:-.01em;
  margin:.2rem 0 .9rem;
}
.h2--c{ text-align:center; }

.eyebrow{
  font-size:.75rem; font-weight:700; letter-spacing:.18em; text-transform:uppercase;
  color:var(--gold); margin:0 0 .35rem;
}
.eyebrow--c{ text-align:center; }

.sub{
  max-width:62ch; margin:0 auto 3rem; text-align:center; color:var(--cream-2);
  font-size:1.05rem;
}

/* ---------- tlačítka ---------- */

.btn{
  display:inline-block; padding:.85rem 1.6rem; border-radius:999px;
  font-weight:700; font-size:.95rem; text-decoration:none; cursor:pointer;
  border:1px solid transparent; transition:transform .15s, box-shadow .2s, background .2s, color .2s;
}
.btn:hover{ transform:translateY(-2px); }

.btn--gold{
  background:linear-gradient(180deg, var(--gold-2), var(--gold));
  color:#211a0e; box-shadow:0 8px 24px -10px rgba(200,160,75,.75);
}
.btn--gold:hover{ box-shadow:0 14px 30px -10px rgba(200,160,75,.9); }

.btn--ghost{ border-color:var(--line); color:var(--cream); background:rgba(255,255,255,.03); }
.btn--ghost:hover{ border-color:var(--gold); color:var(--gold-2); }

.btn--small{ padding:.55rem 1.1rem; font-size:.85rem; }

/* =========================================================
   NAVIGACE
   ========================================================= */

.nav{
  position:sticky; top:0; z-index:50;
  background:rgba(18,16,14,.72);
  backdrop-filter:blur(12px);
  border-bottom:1px solid transparent;
  transition:background .25s, border-color .25s;
}
.nav.is-stuck{ background:rgba(18,16,14,.94); border-bottom-color:var(--line); }

.nav__in{ display:flex; align-items:center; justify-content:space-between; gap:1rem; height:68px; }

.brand{ display:flex; align-items:center; gap:.65rem; text-decoration:none; }
.brand__mark{
  font-size:1.9rem; line-height:1; color:var(--gold);
  text-shadow:0 2px 10px rgba(200,160,75,.35);
}
.brand__txt{ display:flex; flex-direction:column; line-height:1.15; }
.brand__txt strong{ font-family:var(--serif); font-size:1.15rem; letter-spacing:.01em; }
.brand__txt em{ font-style:normal; font-size:.68rem; letter-spacing:.16em; text-transform:uppercase; color:var(--muted); }

.menu{ display:flex; align-items:center; gap:1.6rem; }
.menu a{
  text-decoration:none; font-size:.92rem; font-weight:500; color:var(--cream-2);
  position:relative; padding:.25rem 0; transition:color .2s;
}
.menu a::after{
  content:""; position:absolute; left:0; right:100%; bottom:-2px; height:2px;
  background:var(--gold); transition:right .25s;
}
.menu a:hover{ color:var(--cream); }
.menu a:hover::after{ right:0; }

.menu__cta{
  border:1px solid var(--line); border-radius:999px; padding:.45rem 1.1rem !important;
  color:var(--gold-2) !important;
}
.menu__cta::after{ display:none; }
.menu__cta:hover{ background:var(--gold); color:#211a0e !important; border-color:var(--gold); }

.burger{
  display:none; width:42px; height:38px; background:none; border:1px solid var(--line);
  border-radius:9px; cursor:pointer; padding:9px 10px;
}
.burger span{ display:block; height:2px; background:var(--cream); margin:3px 0; transition:.25s; }
.burger[aria-expanded="true"] span:nth-child(1){ transform:translateY(5px) rotate(45deg); }
.burger[aria-expanded="true"] span:nth-child(2){ opacity:0; }
.burger[aria-expanded="true"] span:nth-child(3){ transform:translateY(-5px) rotate(-45deg); }

/* =========================================================
   HERO
   ========================================================= */

.hero{ position:relative; overflow:hidden; padding:clamp(3.5rem,9vw,7rem) 0 0; }

/* šachovnice v pozadí */
.hero__board{
  position:absolute; inset:-20% -10% auto -10%; height:130%;
  background-image:
    linear-gradient(45deg, rgba(242,233,216,.045) 25%, transparent 25%, transparent 75%, rgba(242,233,216,.045) 75%),
    linear-gradient(45deg, rgba(242,233,216,.045) 25%, transparent 25%, transparent 75%, rgba(242,233,216,.045) 75%);
  background-size:112px 112px;
  background-position:0 0, 56px 56px;
  transform:perspective(900px) rotateX(52deg) scale(1.5);
  transform-origin:50% 100%;
  mask-image:linear-gradient(to bottom, transparent, #000 35%, transparent 92%);
  -webkit-mask-image:linear-gradient(to bottom, transparent, #000 35%, transparent 92%);
}
.hero__glow{
  position:absolute; left:50%; top:-10%; width:900px; height:900px; transform:translateX(-50%);
  background:radial-gradient(circle, rgba(200,160,75,.16), transparent 62%);
  pointer-events:none;
}

.hero__in{
  position:relative; display:grid; grid-template-columns:1.15fr .85fr; gap:2rem; align-items:center;
  padding-bottom:clamp(3rem,7vw,5.5rem);
}

.hero h1{
  font-family:var(--serif); font-weight:600;
  font-size:clamp(2.6rem, 7vw, 4.6rem); line-height:1.02; letter-spacing:-.02em;
  margin:.4rem 0 1.1rem;
}
.hero h1 span{
  background:linear-gradient(100deg, var(--gold-2), var(--gold) 55%, #8f6f2c);
  -webkit-background-clip:text; background-clip:text; color:transparent;
  font-style:italic;
}

.lead{ max-width:48ch; color:var(--cream-2); font-size:1.1rem; margin:0 0 2rem; }

.hero__btns{ display:flex; flex-wrap:wrap; gap:.8rem; }

/* dekorativní figurky */
.hero__pieces{ position:relative; height:380px; }
.pc{
  position:absolute; line-height:1; color:var(--cream);
  text-shadow:0 18px 40px rgba(0,0,0,.65);
  animation:float 7s ease-in-out infinite;
}
.pc--k{ font-size:16rem; right:2%;  top:2%;   color:var(--gold-2); opacity:.95; }
.pc--q{ font-size:7.5rem; left:2%;  top:24%;  opacity:.5;  animation-delay:-1.6s; }
.pc--n{ font-size:5.5rem; left:26%; bottom:2%; opacity:.35; animation-delay:-3.2s; }
.pc--r{ font-size:4.5rem; right:8%; bottom:0; opacity:.28; animation-delay:-4.8s; }

@keyframes float{
  0%,100%{ transform:translateY(0) rotate(0deg); }
  50%    { transform:translateY(-16px) rotate(-1.5deg); }
}

/* pruh šachovnice pod hero */
.hero__strip{
  height:14px;
  background:
    repeating-linear-gradient(90deg, var(--gold) 0 28px, transparent 28px 56px),
    var(--wood);
  opacity:.85;
}

/* =========================================================
   SEKCE
   ========================================================= */

.sec{ padding:clamp(3.5rem,8vw,6.5rem) 0; }
.sec--alt{ background:var(--ink-2); border-block:1px solid var(--line); }

/* ---------- karty ---------- */

.cards{ display:grid; grid-template-columns:repeat(3,1fr); gap:1.25rem; }

.card{
  position:relative; overflow:hidden;
  background:linear-gradient(160deg, var(--panel), var(--ink-2));
  border:1px solid var(--line); border-radius:var(--radius);
  padding:2rem 1.7rem 1.9rem;
  transition:transform .22s, border-color .22s, box-shadow .22s;
}
.card::before{
  content:""; position:absolute; inset:0;
  background-image:
    linear-gradient(45deg, rgba(242,233,216,.05) 25%, transparent 25%, transparent 75%, rgba(242,233,216,.05) 75%),
    linear-gradient(45deg, rgba(242,233,216,.05) 25%, transparent 25%, transparent 75%, rgba(242,233,216,.05) 75%);
  background-size:44px 44px; background-position:0 0, 22px 22px;
  opacity:0; transition:opacity .25s; pointer-events:none;
}
.card:hover{ transform:translateY(-5px); border-color:rgba(200,160,75,.45); box-shadow:0 22px 45px -28px rgba(0,0,0,.9); }
.card:hover::before{ opacity:1; }
.card > *{ position:relative; }

.card__ico{ font-size:2.6rem; line-height:1; color:var(--gold); display:block; margin-bottom:.8rem; }
.card h3{ font-family:var(--serif); font-size:1.35rem; font-weight:600; margin:0 0 .5rem; }
.card p{ margin:0; color:var(--cream-2); font-size:.96rem; }

/* ---------- tabulka tréninků ---------- */

.schedule{ max-width:780px; margin-inline:auto; }

.tbl{ width:100%; border-collapse:collapse; font-size:.95rem; }
.tbl th{
  text-align:left; font-size:.72rem; letter-spacing:.15em; text-transform:uppercase;
  color:var(--muted); font-weight:700; padding:0 .6rem .7rem 0; border-bottom:1px solid var(--line);
}
.tbl td{ padding:.95rem .6rem .95rem 0; border-bottom:1px solid var(--line); vertical-align:top; }
.tbl tbody tr{ transition:background .18s; }
.tbl tbody tr:hover{ background:rgba(200,160,75,.06); }
.tbl td b{ display:block; font-weight:600; }
.tbl td em{ font-style:normal; font-size:.82rem; color:var(--muted); }
.tbl td:nth-child(3){ color:var(--gold-2); white-space:nowrap; font-weight:600; }
.tbl td:nth-child(4){ color:var(--cream-2); font-size:.88rem; }

.note{
  margin-top:1.5rem; padding:1rem 1.2rem; font-size:.9rem; color:var(--cream-2);
  border-left:3px solid var(--gold); background:rgba(200,160,75,.07); border-radius:0 10px 10px 0;
}
.note i{ font-style:italic; color:var(--cream); }

/* ---------- kontakt ---------- */

.contactbox{ max-width:620px; margin-inline:auto; }

.contact{
  list-style:none; margin:0; padding:0;
  border-top:1px solid var(--line);
}
.contact li{
  display:flex; align-items:baseline; justify-content:space-between; gap:1rem; flex-wrap:wrap;
  padding:.95rem .2rem; border-bottom:1px solid var(--line);
}
.contact li:nth-child(odd){ background:rgba(255,255,255,.02); }
.contact span{
  font-size:.75rem; letter-spacing:.13em; text-transform:uppercase; color:var(--muted);
}
.contact b{ font-weight:600; text-align:right; }
.contact a{
  text-decoration:none; border-bottom:1px solid rgba(200,160,75,.5); color:var(--gold-2);
}
.contact a:hover{ border-bottom-color:var(--gold-2); }

/* ---------- patička ---------- */

.foot{ background:#0d0b09; border-top:1px solid var(--line); padding:2.6rem 0; }
.foot__in{ display:grid; gap:1.4rem; }
.foot__brand{ display:flex; align-items:center; gap:.8rem; }
.foot__brand strong{ font-family:var(--serif); font-size:1.05rem; }
.foot__brand p{ margin:.1rem 0 0; font-size:.85rem; color:var(--muted); }
.foot__nav{ display:flex; flex-wrap:wrap; gap:1.4rem; }
.foot__nav a{ text-decoration:none; font-size:.9rem; color:var(--cream-2); }
.foot__nav a:hover{ color:var(--gold-2); }
.foot__cp{ margin:0; font-size:.8rem; color:#6d6455; border-top:1px solid var(--line); padding-top:1.2rem; }

/* ---------- animace při scrollu ---------- */

.reveal{ opacity:0; transform:translateY(24px); transition:opacity .6s ease, transform .6s ease; }
.reveal.is-in{ opacity:1; transform:none; }

/* =========================================================
   RESPONZIVITA
   ========================================================= */

@media (max-width:980px){
  .hero__in{ grid-template-columns:1fr; }
  .hero__pieces{ display:none; }
  .cards{ grid-template-columns:1fr 1fr; }
}

@media (max-width:760px){
  .burger{ display:block; }
  .menu{
    position:absolute; left:0; right:0; top:68px;
    flex-direction:column; align-items:stretch; gap:0;
    background:rgba(16,13,11,.98); border-bottom:1px solid var(--line);
    padding:.5rem 1.25rem 1.25rem;
    display:none;
  }
  .menu.is-open{ display:flex; }
  .menu a{ padding:.9rem 0; border-bottom:1px solid var(--line); }
  .menu a::after{ display:none; }
  .menu__cta{ text-align:center; margin-top:.8rem; border-bottom:1px solid var(--line) !important; }
}

@media (max-width:620px){
  .cards{ grid-template-columns:1fr; }

  /* rozvrh se na mobilu zalomí do karet */
  .tbl thead{ display:none; }
  .tbl, .tbl tbody, .tbl tr, .tbl td{ display:block; width:100%; }
  .tbl tr{
    border:1px solid var(--line); border-radius:10px;
    padding:.9rem 1rem; margin-bottom:.75rem;
    background:rgba(255,255,255,.02);
  }
  .tbl td{ border:0; padding:.15rem 0; }
  .tbl td:nth-child(2)::before{ content:"Kdy: "; color:var(--muted); }
  .tbl td:nth-child(4)::before{ content:"Kde: "; color:var(--muted); }
  .tbl td:nth-child(2), .tbl td:nth-child(3){ display:inline-block; width:auto; }
  .tbl td:nth-child(3){ margin-left:.4rem; }
  .contact li{ flex-direction:column; gap:.15rem; }
  .contact b{ text-align:left; }
}

@media (prefers-reduced-motion:reduce){
  *{ animation:none !important; transition:none !important; }
  html{ scroll-behavior:auto; }
  .reveal{ opacity:1; transform:none; }
}