:root{
  --bg1:#0b1220;
  --bg2:#0f172a;
  --card:#ffffff;
  --line:#e6e9ef;
  --muted:#5b6573;
  --text:#111827;
  --primary:#1f6feb;
  --primary2:#1a5fd0;
  --chip:#f5f7fb;
  --shadow:0 18px 45px rgba(0,0,0,.28);
  --r:18px;
  --r2:22px;
  --max:1100px;
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
  background: radial-gradient(1200px 520px at 35% 0%, rgba(31,111,235,.22), transparent 60%),
              linear-gradient(180deg,var(--bg1),var(--bg2));
  color:var(--text);
}
a{color:inherit;text-decoration:none}
.container{max-width:var(--max); margin:0 auto; padding:26px 18px;}
.shell{
  background:rgba(255,255,255,.08);
  border:1px solid rgba(255,255,255,.14);
  border-radius:28px;
  padding:14px;
  box-shadow: var(--shadow);
}
.card{
  background:var(--card);
  border:1px solid rgba(17,24,39,.10);
  border-radius:24px;
  overflow:hidden;
}
.topbar{
  display:flex; align-items:center; justify-content:space-between;
  padding:14px 18px;
  border-bottom:1px solid var(--line);
}
.brand{
  display:flex; align-items:center; gap:10px;
  font-weight:800; font-size:14px; letter-spacing:.02em;
}
.brand .dot{width:10px;height:10px;border-radius:5px;background:var(--primary)}
.nav{display:flex; gap:18px; align-items:center; color:var(--muted); font-size:14px;}
.nav a{padding:6px 0}
.lang{display:flex; gap:12px; font-weight:800; color:var(--muted); font-size:14px;}
.main{padding:36px 34px 0;}
@media (max-width:900px){ .main{padding:28px 18px 0;} }

.hero{display:grid; grid-template-columns: 1.05fr .95fr; gap:22px; align-items:center;}
@media (max-width:900px){ .hero{grid-template-columns:1fr; } }

.h1{font-size:40px; line-height:1.1; margin:0 0 10px 0; font-weight:900;}
.p{color:var(--muted); margin:0 0 14px 0; line-height:1.6; font-size:15px;}
.btns{display:flex; gap:12px; flex-wrap:wrap; margin-top:14px;}
.btn{
  height:42px; padding:0 18px;
  display:inline-flex; align-items:center; justify-content:center;
  border-radius:12px;
  border:1px solid rgba(17,24,39,.14);
  background:#fff;
  font-weight:800; font-size:14px;
}
.btn.primary{
  background:var(--primary);
  border-color:var(--primary2);
  color:#fff;
}
.btn:active{transform:translateY(1px)}
.hero-illu{
  width:100%;
  border-radius:18px;
  border:1px solid rgba(17,24,39,.10);
  background:linear-gradient(180deg,#f7f9fc,#eef3fb);
  overflow:hidden;
}
.hero-illu svg{display:block; width:100%; height:auto;}

.centerline{
  text-align:center;
  padding:18px 0 18px;
  color:var(--muted);
  font-weight:700;
}

.steps{
  display:grid; grid-template-columns: repeat(3, 1fr);
  border-top:1px solid var(--line);
  margin-top:18px;
}
@media (max-width:820px){ .steps{grid-template-columns:1fr;} }
.step{
  display:flex; gap:12px; align-items:center; justify-content:center;
  padding:16px 10px;
  border-right:1px solid var(--line);
  background:#fff;
}
.step:last-child{border-right:none}
.step button{
  width:100%;
  max-width:360px;
  display:flex; gap:12px; align-items:center; justify-content:center;
  border:0; background:transparent;
  cursor:pointer;
  padding:10px 10px;
  border-radius:14px;
  transition: background 120ms ease, box-shadow 120ms ease;
}
.step button:hover{background:rgba(31,111,235,.06)}
.step button:focus-visible{outline:3px solid rgba(31,111,235,.25); outline-offset:3px;}
.icon{
  width:34px;height:34px;border-radius:12px;
  border:1px solid rgba(17,24,39,.12);
  background:var(--chip);
  display:grid; place-items:center;
}
.label{font-weight:900; font-size:12px; letter-spacing:.08em; text-transform:uppercase; color:#0f172a;}
.step.selected button{background:rgba(34,197,94,.10)}
.step.selected .icon{background:#dcfce7; border-color:#86efac}
.step.selected .label{color:#14532d}

.safety{
  border-top:1px solid var(--line);
  padding:14px 18px 18px;
  color:var(--muted);
  font-size:12.5px;
  line-height:1.55;
}
.footer{
  padding:14px 18px 18px;
  color:rgba(255,255,255,.72);
  font-size:12px;
  text-align:center;
}
.kicker{display:inline-block; font-weight:900; font-size:12px; letter-spacing:.1em; text-transform:uppercase; color:var(--muted); margin-bottom:10px;}
.h2{font-size:22px; font-weight:900; margin:26px 0 10px;}
.hr{height:1px;background:var(--line); margin:18px 0;}
.callout{
  border:1px solid var(--line);
  border-radius:16px;
  padding:14px 14px;
  background:#fff;
}
.callout .title{font-weight:900;margin-bottom:6px}
.small{color:var(--muted); font-size:12.5px; line-height:1.55;}
.prompt{
  border:1px solid var(--line);
  background:#fff;
  border-radius:16px;
  padding:14px;
  position:relative;
  margin:12px 0 16px;
}
.prompt pre{margin:0; white-space:pre-wrap; word-wrap:break-word; color:#111827; line-height:1.6; font-size:14px; padding-right:120px;}
.copy{
  position:absolute; right:12px; top:12px;
  height:30px; padding:0 12px;
  border-radius:10px;
  border:1px solid rgba(17,24,39,.14);
  background:#fff;
  font-size:12px; font-weight:900; color:var(--muted);
  cursor:pointer;
}
.toast{
  position:fixed;
  left:50%; transform:translateX(-50%);
  bottom:18px;
  background:#111827;
  color:#fff;
  padding:10px 12px;
  border-radius:12px;
  font-size:13px;
  opacity:0;
  pointer-events:none;
  transition: opacity 180ms ease;
}
.toast.show{opacity:.95}
.list{margin:10px 0 0 18px; color:var(--muted); line-height:1.7;}
.badgeRow{display:flex; gap:8px; flex-wrap:wrap; margin:10px 0 0}
.badge{
  font-size:12px;
  font-weight:900;
  padding:7px 10px;
  border-radius:999px;
  border:1px solid rgba(17,24,39,.12);
  background:var(--chip);
  color:#0f172a;
}
.badge.on{background:#dcfce7;border-color:#86efac;color:#14532d}

/* Settings AI: prompt cards */
.cards-grid{
  display:grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap:16px;
  margin-top:14px;
}
@media (max-width: 980px){
  .cards-grid{grid-template-columns: repeat(2, minmax(0, 1fr));}
}
@media (max-width: 560px){
  .cards-grid{grid-template-columns: 1fr;}
}
.modecard{
  background:var(--card);
  border:1px solid rgba(17,24,39,.10);
  border-radius:24px;
  overflow:hidden;
}
.modecard .art{
  height:120px;
  display:flex;
  align-items:center;
  justify-content:center;
  border-bottom:1px solid rgba(17,24,39,.08);
  background:linear-gradient(135deg, rgba(31,111,235,.10), rgba(99,102,241,.10));
}
.modecard .body{padding:14px 14px 16px;}
.badge{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:12px;
  font-weight:900;
  color:var(--muted);
  border:1px solid rgba(17,24,39,.12);
  background:#fff;
  border-radius:999px;
  padding:6px 10px;
}
.modecard .title{font-weight:950; font-size:16px; margin:10px 0 6px;}
.modecard .desc{color:var(--muted); font-size:13px; line-height:1.55;}
.modecard .prompt{margin-top:12px;}
.modecard .btns{margin-top:10px;}
.master-wrap{display:grid; grid-template-columns: 1.1fr .9fr; gap:16px; align-items:start;}
@media (max-width: 980px){ .master-wrap{grid-template-columns:1fr;} }
.master-note{background:#fff; border:1px solid var(--line); border-radius:16px; padding:14px;}
.master-note ul{margin:10px 0 0 18px; color:var(--muted); font-size:13px; line-height:1.6;}
.master-note li{margin:6px 0;}


/* Nastavení AI: tiles + toast + hidden prompts */
.tiles-grid{
  display:grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap:16px;
  margin-top:14px;
}
@media (max-width: 980px){
  .tiles-grid{grid-template-columns: repeat(2, minmax(0, 1fr));}
}
@media (max-width: 560px){
  .tiles-grid{grid-template-columns: 1fr;}
}
.tile{
  text-align:left;
  width:100%;
  border:1px solid rgba(17,24,39,.10);
  background:var(--card);
  border-radius:24px;
  overflow:hidden;
  cursor:pointer;
  transition: transform .08s ease, box-shadow .08s ease;
}
.tile:hover{ transform: translateY(-1px); box-shadow: 0 12px 30px rgba(17,24,39,.08); }
.tile:active{ transform: translateY(0px); box-shadow: none; }
.tile-art{
  height:110px;
  display:flex;
  align-items:center;
  justify-content:center;
  border-bottom:1px solid rgba(17,24,39,.08);
  background:linear-gradient(135deg, rgba(31,111,235,.10), rgba(99,102,241,.10));
}
.tile-emoji{
  width:52px;height:52px;border-radius:18px;
  display:flex;align-items:center;justify-content:center;
  font-size:24px;
  background:#fff;
  border:1px solid rgba(17,24,39,.12);
}
.tile-body{ padding:14px 14px 16px; }
.tile-title{ font-weight:950; font-size:16px; margin:0; }

.master-card{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:14px;
  border:1px solid rgba(17,24,39,.10);
  background:var(--card);
  border-radius:24px;
  padding:16px;
  margin-top:12px;
}
.master-title{ font-weight:950; font-size:16px; }
.master-sub{ color:var(--muted); font-size:13px; margin-top:6px; line-height:1.45; }
.master-right{ flex: 0 0 auto; }

.hidden-prompt{
  position:absolute !important;
  left:-9999px !important;
  top:-9999px !important;
  width:1px !important;
  height:1px !important;
  overflow:hidden !important;
  white-space:pre-wrap;
}

.toast{
  position: fixed;
  left: 50%;
  bottom: 18px;
  transform: translateX(-50%);
  background: rgba(17,24,39,.92);
  color: #fff;
  padding: 12px 14px;
  border-radius: 14px;
  font-size: 13px;
  line-height: 1.35;
  max-width: 560px;
  width: calc(100% - 28px);
  box-shadow: 0 18px 40px rgba(0,0,0,.22);
  opacity: 0;
  pointer-events: none;
  transition: opacity .12s ease, transform .12s ease;
  z-index: 9999;
}
.toast.show{
  opacity: 1;
  transform: translateX(-50%) translateY(-4px);
}

.tile-desc{ color:var(--muted); font-size:13px; line-height:1.45; margin-top:6px; }
/* Tile feedback (saved state) */
.tile.saved{
  border-color: rgba(16,185,129,.55);
  background: linear-gradient(180deg, rgba(16,185,129,.08), rgba(255,255,255,0));
}
.tile-msg{
  padding:16px;
}
.tile-msg-title{
  font-weight:950;
  font-size:16px;
  margin-bottom:6px;
}
.tile-msg-text{
  color: var(--muted);
  font-size:13px;
  line-height:1.45;
}
/* Master tile highlight */
.tile-master{
  border-color: rgba(99,102,241,.45);
  background: linear-gradient(180deg, rgba(99,102,241,.08), rgba(255,255,255,0));
}
.tile-master .tile-art{
  background:linear-gradient(135deg, rgba(245,158,11,.14), rgba(99,102,241,.12));
}

/* Mobile menu (does not affect desktop) */
.menuBtn{ display:none; }
.mobileNav{ display:none; }

@media (max-width: 720px){
  .menuBtn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    width:40px; height:36px;
    border:1px solid var(--line);
    background:#fff;
    border-radius:12px;
    font-size:18px;
    cursor:pointer;
  }
  .menuBtn:active{ transform: translateY(1px); }

  /* hide desktop nav on mobile */
  .nav{ display:none; }

  /* dropdown */
  body.menu-open .mobileNav{ display:block; }
  .mobileNav{
    position: fixed;
    left: 16px; right: 16px;
    top: 64px;
    background:#fff;
    border:1px solid var(--line);
    border-radius:16px;
    padding:10px;
    box-shadow: 0 18px 45px rgba(0,0,0,.12);
    z-index: 9999;
  }
  .mobileNav a{
    display:block;
    padding:12px 12px;
    border-radius:12px;
    color:var(--text);
    font-weight:800;
  }
  .mobileNav a + a{ margin-top:4px; }
  .mobileNav a:hover{ background: var(--chip); }

  /* tighten topbar on mobile */
  .topbar{ padding:12px 14px; }
  .brand{ font-size:14px; }
  .lang{ gap:10px; font-size:13px; }
}

/* Mobile layout niceties */
@media (max-width: 720px){
  .hero{ grid-template-columns: 1fr; }
  .tiles{ grid-template-columns: 1fr; }
  .prompt pre{ font-size: 12px; }
}


/* Content links */
.main a{
  color:#2563eb !important;
  text-decoration: underline !important;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}
.main a:hover{ opacity: .9; }
.main a:visited{ color:#2563eb !important; }