/* ===========================================================
   SAT TV Heidelberg — shared styles
   Palette: deep night sky + signal amber + link teal
   =========================================================== */

:root{
  --bg:        #0b1420;
  --bg-soft:   #101d2e;
  --panel:     #142235;
  --panel-2:   #1a2b42;
  --line:      #25394f;
  --text:      #e7eef6;
  --muted:     #93a7bf;
  --accent:    #ffb454;   /* signal amber */
  --accent-2:  #5fd0c8;   /* link teal */
  --danger:    #ff6b6b;
  --radius:    14px;
  --maxw:      1080px;
  --font-display: "Space Grotesk", "Segoe UI", sans-serif;
  --font-body:    "Inter", "Segoe UI", sans-serif;
  --font-mono:    "JetBrains Mono", "Consolas", monospace;
}

*{ box-sizing:border-box; }

html{ scroll-behavior:smooth; }

body{
  margin:0;
  font-family: var(--font-body);
  background:
    radial-gradient(ellipse at 80% -10%, rgba(95,208,200,.12), transparent 45%),
    radial-gradient(ellipse at 10% 0%, rgba(255,180,84,.10), transparent 40%),
    var(--bg);
  color: var(--text);
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
}

/* faint "starfield" dots */
body::before{
  content:"";
  position:fixed; inset:0;
  pointer-events:none;
  background-image:
    radial-gradient(1px 1px at 20% 30%, rgba(255,255,255,.35) 50%, transparent 51%),
    radial-gradient(1px 1px at 70% 80%, rgba(255,255,255,.25) 50%, transparent 51%),
    radial-gradient(1.5px 1.5px at 40% 60%, rgba(255,255,255,.2) 50%, transparent 51%),
    radial-gradient(1px 1px at 90% 20%, rgba(255,255,255,.3) 50%, transparent 51%),
    radial-gradient(1px 1px at 55% 10%, rgba(255,255,255,.2) 50%, transparent 51%);
  background-repeat:no-repeat;
  opacity:.6;
  z-index:0;
}

a{ color: var(--accent-2); text-decoration:none; }
a:hover{ text-decoration:underline; }

img{ max-width:100%; height:auto; display:block; border-radius:10px; }

h1,h2,h3{ font-family:var(--font-display); line-height:1.15; letter-spacing:.01em; }
h1{ font-size:clamp(1.9rem, 4vw, 2.8rem); margin:.2em 0 .3em; }
h2{ font-size:clamp(1.25rem, 2.4vw, 1.6rem); margin:1.6em 0 .6em; color:var(--accent); }
h3{ font-size:1.05rem; margin:1.2em 0 .4em; color:var(--accent-2); }

code, .mono{ font-family:var(--font-mono); }

/* ---------- header / nav ---------- */
header.site{
  position:sticky; top:0; z-index:50;
  background: rgba(11,20,32,.85);
  backdrop-filter: blur(8px);
  border-bottom:1px solid var(--line);
}
.nav-wrap{
  max-width: var(--maxw);
  margin:0 auto;
  display:flex; align-items:center; justify-content:space-between;
  padding:.85rem 1.25rem;
  gap:1rem;
}
.brand{
  display:flex; align-items:center; gap:.6rem;
  font-family:var(--font-display); font-weight:700; font-size:1.15rem;
  color:var(--text);
}
.brand .dot{
  width:10px; height:10px; border-radius:50%;
  background: var(--accent);
  box-shadow:0 0 0 4px rgba(255,180,84,.18), 0 0 14px rgba(255,180,84,.6);
}
.brand small{ display:block; color:var(--muted); font-weight:400; font-size:.7rem; font-family:var(--font-body); letter-spacing:.08em; }

nav.main{
  display:flex; flex-wrap:wrap; gap:.25rem 1.1rem;
}
nav.main a{
  color:var(--muted);
  font-size:.92rem;
  font-weight:500;
  padding:.3rem 0;
  border-bottom:2px solid transparent;
  transition:color .15s, border-color .15s;
}
nav.main a:hover, nav.main a.active{
  color:var(--text);
  text-decoration:none;
  border-color:var(--accent);
}

#nav-toggle{ display:none; }
.nav-burger{ display:none; }

/* ---------- layout ---------- */
main{
  position:relative; z-index:1;
  max-width: var(--maxw);
  margin:0 auto;
  padding: 1.5rem 1.25rem 4rem;
}

.hero{
  padding: 2.4rem 0 1.4rem;
  border-bottom:1px solid var(--line);
  margin-bottom:2rem;
}
.eyebrow{
  display:inline-flex; align-items:center; gap:.5rem;
  font-family:var(--font-mono);
  font-size:.78rem;
  letter-spacing:.12em;
  text-transform:uppercase;
  color:var(--accent-2);
  background:rgba(95,208,200,.08);
  border:1px solid rgba(95,208,200,.25);
  padding:.25rem .7rem;
  border-radius:999px;
  margin-bottom:.9rem;
}
.lead{ color:var(--muted); font-size:1.05rem; max-width:62ch; }

/* ---------- cards / grid ---------- */
.grid{ display:grid; gap:1.1rem; }
.grid.cols-2{ grid-template-columns: repeat(auto-fit, minmax(260px,1fr)); }
.grid.cols-3{ grid-template-columns: repeat(auto-fit, minmax(220px,1fr)); }

.card{
  background: linear-gradient(180deg, var(--panel), var(--bg-soft));
  border:1px solid var(--line);
  border-radius: var(--radius);
  padding:1.25rem 1.35rem;
}
.card h3{ margin-top:0; }
.card img{ margin-bottom:.8rem; }

.card.product{ display:flex; flex-direction:column; gap:.6rem; }
.card.product .specs{ font-family:var(--font-mono); font-size:.85rem; color:var(--muted); }
.tag{
  display:inline-block; font-size:.72rem; font-family:var(--font-mono);
  color:var(--bg); background:var(--accent);
  padding:.15rem .5rem; border-radius:6px; font-weight:700;
  letter-spacing:.04em;
}
.tag.alt{ background:var(--accent-2); }

/* ---------- step list ---------- */
ol.steps{ counter-reset: step; list-style:none; padding:0; margin:1.2rem 0; display:flex; flex-direction:column; gap:1.1rem; }
ol.steps > li{
  position:relative;
  padding:1rem 1.2rem 1rem 3.4rem;
  background:var(--panel);
  border:1px solid var(--line);
  border-radius:var(--radius);
}
ol.steps > li::before{
  counter-increment: step;
  content: counter(step);
  position:absolute; left:1rem; top:1rem;
  font-family:var(--font-display); font-weight:700;
  color:var(--bg); background:var(--accent-2);
  width:1.7rem; height:1.7rem; border-radius:8px;
  display:flex; align-items:center; justify-content:center;
  font-size:.95rem;
}
ol.steps img{ margin-top:.7rem; max-width:320px; }
ol.steps strong{ color:var(--accent); }

/* ---------- table ---------- */
.table-wrap{ overflow-x:auto; margin:1rem 0; border:1px solid var(--line); border-radius:var(--radius); }
table{ width:100%; border-collapse:collapse; font-size:.92rem; min-width:560px; }
th, td{ padding:.55rem .8rem; text-align:left; border-bottom:1px solid var(--line); white-space:nowrap; }
th{ font-family:var(--font-mono); font-size:.75rem; letter-spacing:.08em; text-transform:uppercase; color:var(--accent-2); background:var(--bg-soft); }
tr:last-child td{ border-bottom:none; }
td.num, th.num{ font-family:var(--font-mono); }

/* ---------- link list ---------- */
ul.linklist{ list-style:none; padding:0; display:flex; flex-direction:column; gap:.6rem; }
ul.linklist li{
  background:var(--panel); border:1px solid var(--line); border-radius:10px;
  padding:.8rem 1rem; display:flex; flex-wrap:wrap; gap:.4rem 1rem; align-items:baseline;
}
ul.linklist .label{ color:var(--text); font-weight:600; }
ul.linklist a{ font-family:var(--font-mono); font-size:.88rem; word-break:break-all; }

/* ---------- callouts ---------- */
.callout{
  border-left:3px solid var(--accent);
  background:rgba(255,180,84,.07);
  padding:.9rem 1.1rem; border-radius:0 10px 10px 0;
  margin:1.1rem 0;
}
.callout.warn{ border-color:var(--danger); background:rgba(255,107,107,.08); }
.callout strong{ color:var(--accent); }
.callout.warn strong{ color:var(--danger); }

/* ---------- back-to-top ---------- */
.back-top{
  display:inline-flex; align-items:center; gap:.4rem;
  margin-top:2.5rem; font-family:var(--font-mono); font-size:.85rem;
  color:var(--muted); border:1px solid var(--line); border-radius:999px;
  padding:.4rem 1rem;
}
.back-top:hover{ color:var(--accent-2); border-color:var(--accent-2); text-decoration:none; }

/* ---------- footer ---------- */
footer.site{
  border-top:1px solid var(--line);
  padding:1.6rem 1.25rem;
  text-align:center;
  color:var(--muted);
  font-size:.85rem;
  position:relative; z-index:1;
}
footer.site a{ color:var(--muted); }
footer.site .sep{ margin:0 .4rem; opacity:.4; }

/* ---------- channel image (index) ---------- */
.channels-card{ text-align:center; }
.channels-card img{ margin:0 auto; max-width:100%; border-radius:10px; }

/* ---------- responsive ---------- */
@media (max-width: 760px){
  .nav-wrap{ flex-wrap:wrap; }
  .recv-grid{ grid-template-columns: 1fr !important; }
  nav.main{
    display:none;
    width:100%;
    flex-direction:column;
    padding-top:.6rem;
    border-top:1px solid var(--line);
    margin-top:.6rem;
  }
  #nav-toggle:checked ~ nav.main{ display:flex; }
  .nav-burger{
    display:flex; align-items:center; justify-content:center;
    width:2.4rem; height:2.4rem; border:1px solid var(--line); border-radius:8px;
    color:var(--text); cursor:pointer; font-size:1.2rem;
  }
  ol.steps img{ max-width:100%; }
}

@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
}