/* Táborová pošta — vizuál vychází z letecké obálky:
   modročervený pruh, razítko, perforace známky. */

:root{
  --ink:#14213A;
  --ink-soft:#3C4A66;
  --muted:#6B7789;
  --paper:#E9EDF2;
  --card:#FFFFFF;
  --line:#D4DBE4;
  --air-red:#C0392F;
  --air-blue:#2E5EA8;
  --sun:#E0A73C;
  --ok:#2E7D5B;

  --r:10px;
  --shadow:0 1px 0 var(--line), 0 8px 24px -18px rgba(20,33,58,.6);
  --display:"Barlow Condensed", "Arial Narrow", system-ui, sans-serif;
  --body:"IBM Plex Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono:"IBM Plex Mono", ui-monospace, "Courier New", monospace;
}

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

html{-webkit-text-size-adjust:100%}

body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--body);
  font-size:17px;
  line-height:1.55;
}

.wrap{width:min(1000px,100% - 2.5rem);margin-inline:auto}

a{color:var(--air-blue)}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{
  outline:3px solid var(--sun);outline-offset:2px;border-radius:4px;
}

/* --- signature: letecký pruh --- */
.airmail{
  height:7px;
  background:repeating-linear-gradient(
    -45deg,
    var(--air-red) 0 10px,
    var(--card) 10px 20px,
    var(--air-blue) 20px 30px,
    var(--card) 30px 40px
  );
}

/* --- hlavička --- */
.topbar{background:var(--card);border-bottom:1px solid var(--line)}
.topbar__in{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:.85rem 0}

.brand{display:flex;align-items:center;gap:.65rem;text-decoration:none;color:var(--ink)}
.brand__mark{
  width:34px;height:34px;flex:none;border-radius:3px;
  background:var(--air-red);
  position:relative;
  box-shadow:inset 0 0 0 3px var(--card);
}
.brand__mark::after{
  content:"";position:absolute;inset:8px;
  background:var(--card);
  clip-path:polygon(0 0,100% 0,50% 60%);
}
.brand__name{
  font-family:var(--display);font-weight:700;text-transform:uppercase;
  letter-spacing:.06em;line-height:.92;font-size:1.05rem;
}

.nav{display:flex;align-items:center;gap:1.1rem;font-family:var(--display);
  text-transform:uppercase;letter-spacing:.06em;font-size:1.05rem;font-weight:600}
.nav a{text-decoration:none;color:var(--ink)}
.nav a:hover{color:var(--air-red)}
.nav__quiet{color:var(--muted) !important}

/* --- typografie --- */
h1,h2,h3{font-family:var(--display);text-transform:uppercase;letter-spacing:.03em;line-height:1;margin:0 0 .5rem}
h1{font-size:clamp(2.4rem,6vw,4rem);font-weight:700}
h2{font-size:clamp(1.5rem,3vw,2rem);font-weight:600}
h3{font-size:1.25rem;font-weight:600}
p{margin:0 0 1rem}
.lead{font-size:1.15rem;color:var(--ink-soft);max-width:52ch}
.muted{color:var(--muted)}
.small{font-size:.9rem}

.eyebrow{
  font-family:var(--mono);font-size:.75rem;letter-spacing:.22em;text-transform:uppercase;
  color:var(--air-red);margin:0 0 .6rem;
}

/* --- karty --- */
.card{
  background:var(--card);border:1px solid var(--line);border-radius:var(--r);
  padding:1.5rem;box-shadow:var(--shadow);margin-bottom:1.5rem;
}
.card--edge{padding-top:1.5rem;position:relative;overflow:hidden}
.card--edge::before{
  content:"";position:absolute;inset:0 0 auto 0;height:6px;
  background:repeating-linear-gradient(-45deg,var(--air-red) 0 8px,var(--card) 8px 16px,var(--air-blue) 16px 24px,var(--card) 24px 32px);
}

.hero{padding:3.5rem 0 2rem}
.hero__grid{display:grid;grid-template-columns:1.15fr .85fr;gap:2.5rem;align-items:start}
@media(max-width:820px){.hero__grid{grid-template-columns:1fr;gap:1.75rem}}

/* --- známka s kódem --- */
.stamp{
  font-family:var(--mono);font-weight:600;letter-spacing:.18em;font-size:1.5rem;
  background:var(--card);color:var(--ink);
  padding:.7rem 1rem;display:inline-block;text-align:center;
  border:2px dashed var(--ink);border-radius:4px;
}
.stamp--sm{font-size:1.05rem;padding:.35rem .6rem;letter-spacing:.14em;border-width:1px}

/* --- formuláře --- */
.field{margin-bottom:1.1rem}
label{display:block;font-weight:600;margin-bottom:.3rem}
.hint{display:block;font-weight:400;color:var(--muted);font-size:.88rem;margin-top:-.1rem;margin-bottom:.35rem}

input[type=text],input[type=email],input[type=password],input[type=date],textarea,select{
  width:100%;font:inherit;color:var(--ink);background:var(--card);
  border:1.5px solid var(--line);border-radius:8px;padding:.65rem .75rem;
}
input:focus,textarea:focus{border-color:var(--air-blue)}
textarea{min-height:13rem;resize:vertical;line-height:1.6}
input[type=file]{font:inherit;width:100%}

.row{display:grid;grid-template-columns:1fr 1fr;gap:1rem}
@media(max-width:620px){.row{grid-template-columns:1fr}}

.btn{
  display:inline-block;font-family:var(--display);text-transform:uppercase;
  letter-spacing:.07em;font-weight:600;font-size:1.15rem;
  background:var(--air-red);color:#fff;border:0;border-radius:8px;
  padding:.6rem 1.35rem;cursor:pointer;text-decoration:none;line-height:1.4;
}
.btn:hover{background:#a52f26}
.btn--sm{font-size:1rem;padding:.35rem .8rem}
.btn--ghost{background:transparent;color:var(--ink);border:1.5px solid var(--ink)}
.btn--ghost:hover{background:var(--ink);color:#fff}
.btn--blue{background:var(--air-blue)}
.btn--blue:hover{background:#244880}
.btn--wide{width:100%;text-align:center}

.actions{display:flex;flex-wrap:wrap;gap:.6rem;align-items:center}

/* --- hlášky --- */
.flash,.error,.notice{border-radius:8px;padding:.75rem 1rem;margin:1.25rem 0;font-size:.98rem}
.flash{background:#DFF0E7;border:1px solid #A7D2BC;color:#1F5C43}
.error{background:#FBE4E2;border:1px solid #E9B4AE;color:#8C2A22}
.notice{background:#E6EDF8;border:1px solid #BFD1EC;color:#1F4074}
.error ul{margin:.4rem 0 0;padding-left:1.1rem}

/* --- seznamy --- */
.list{list-style:none;margin:0;padding:0}
.list li{
  display:flex;justify-content:space-between;gap:1rem;align-items:center;flex-wrap:wrap;
  padding:.9rem 0;border-bottom:1px solid var(--line);
}
.list li:last-child{border-bottom:0}
.tag{font-family:var(--mono);font-size:.72rem;letter-spacing:.1em;text-transform:uppercase;
  padding:.15rem .45rem;border-radius:3px;background:var(--paper);color:var(--muted)}
.tag--new{background:#FBE4E2;color:var(--air-red)}
.tag--done{background:#DFF0E7;color:var(--ok)}

.counter{font-family:var(--mono);font-size:.85rem;color:var(--muted)}
.counter.over{color:var(--air-red);font-weight:600}

.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:1.25rem;margin:2rem 0}
@media(max-width:700px){.steps{grid-template-columns:1fr}}
.steps h3{margin-bottom:.25rem}
.steps .num{font-family:var(--mono);color:var(--air-red);font-size:.8rem;letter-spacing:.2em}

.preview{display:flex;gap:.5rem;flex-wrap:wrap;margin-top:.75rem}
.preview img{width:84px;height:84px;object-fit:cover;border-radius:6px;border:1px solid var(--line)}

.letterbody{white-space:pre-wrap;background:var(--paper);border-radius:8px;padding:1rem;line-height:1.65}

.foot{margin-top:3.5rem;background:var(--card);border-top:1px solid var(--line)}
.foot__in{padding:1.5rem 0;color:var(--muted);font-size:.92rem}
.foot__in p{margin:0}
.foot__meta{font-size:.85rem;margin-top:.25rem !important}

@media (prefers-reduced-motion: reduce){
  *{animation:none !important;transition:none !important}
}