:root{
  /* Palette VA2DFK / VoipDFK */
  --bg-main:#020617;
  --bg-deep:#030b16;
  --bg-panel:#071226;
  --bg-panel-2:#0b1b34;

  --blue-deep:#0a4fb3;
  --blue-main:#0f6fff;
  --blue-bright:#1fb6ff;
  --blue-glow:#67d4ff;

  --text:#f8fbff;
  --muted:rgba(184,199,219,.88);

  --card:rgba(7,18,38,.88);
  --card2:rgba(11,27,52,.72);
  --line:rgba(103,212,255,.16);
  --line-strong:rgba(103,212,255,.28);

  --accent:#9fdcff;
  --kbd:rgba(0,0,0,.35);

  --shadow-soft:0 0 24px rgba(31,182,255,.14);
  --shadow-strong:0 0 36px rgba(31,182,255,.22);
  --radius:18px;
}

*{
  box-sizing:border-box;
}

html{
  scroll-behavior:smooth;
}

body{
  margin:0;
  font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;
  color:var(--text);
  background:
    radial-gradient(900px 600px at 20% 15%, rgba(31,182,255,.12), transparent 55%),
    radial-gradient(800px 500px at 80% 10%, rgba(15,111,255,.10), transparent 50%),
    radial-gradient(1200px 700px at 50% 100%, rgba(103,212,255,.06), transparent 60%),
    linear-gradient(180deg, #01040b 0%, var(--bg-main) 45%, var(--bg-deep) 100%);
  min-height:100vh;
}

.wrap{
  max-width:960px;
  margin:38px auto;
  padding:0 16px 28px;
}

.hero{
  padding:22px 22px 18px;
  border:1px solid var(--line);
  border-radius:22px;
  background:linear-gradient(180deg, rgba(7,18,38,.94), rgba(6,14,30,.96));
  box-shadow:var(--shadow-soft);
  backdrop-filter:blur(12px);
}

h1{
  margin:0;
  font-size:clamp(28px, 4vw, 40px);
  line-height:1.08;
  letter-spacing:.2px;
  font-weight:800;
  text-shadow:0 0 16px rgba(31,182,255,.16);
}

.sub{
  margin-top:8px;
  color:var(--muted);
  font-size:14px;
  line-height:1.6;
}

.actions{
  margin-top:16px;
  display:flex;
  gap:10px;
  flex-wrap:wrap;
}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:10px 14px;
  border-radius:999px;
  border:1px solid var(--line);
  background:rgba(255,255,255,.03);
  color:var(--text);
  cursor:pointer;
  font-weight:600;
  transition:.18s ease;
  text-decoration:none;
}

.btn:hover{
  background:rgba(31,182,255,.10);
  border-color:var(--line-strong);
  box-shadow:0 0 18px rgba(31,182,255,.12);
  transform:translateY(-1px);
}

.card{
  margin-top:16px;
  padding:20px;
  border-radius:20px;
  border:1px solid var(--line);
  background:linear-gradient(180deg, rgba(7,18,38,.90), rgba(8,17,34,.94));
  box-shadow:var(--shadow-soft);
  backdrop-filter:blur(12px);
}

h2{
  margin:0 0 12px;
  font-size:19px;
  color:#fff;
  letter-spacing:.2px;
}

a{
  color:var(--accent);
  text-decoration:none;
  transition:.15s ease;
}

a:hover{
  color:#ffffff;
  text-shadow:0 0 12px rgba(103,212,255,.32);
}

.kbd{
  display:inline-block;
  padding:6px 12px;
  border-radius:12px;
  border:1px solid rgba(103,212,255,.18);
  background:rgba(0,0,0,.30);
  box-shadow:inset 0 1px 0 rgba(255,255,255,.04);
  font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,"Liberation Mono",monospace;
  color:#eef7ff;
  font-size:.94rem;
}

.muted{
  color:var(--muted);
}

.steps{
  display:grid;
  gap:14px;
}

.step{
  padding:14px 14px;
  border-radius:16px;
  border:1px solid rgba(103,212,255,.14);
  background:linear-gradient(180deg, rgba(11,27,52,.62), rgba(7,18,38,.72));
  transition:.18s ease;
}

.step:hover{
  border-color:rgba(103,212,255,.24);
  box-shadow:0 0 18px rgba(31,182,255,.10);
}

.stepTitle{
  font-weight:800;
  margin-bottom:6px;
  color:#ffffff;
}

ul{
  margin:10px 0 0 18px;
  padding:0;
}

li{
  margin:7px 0;
  line-height:1.55;
  color:rgba(240,247,255,.92);
}

.footer{
  margin-top:20px;
  color:rgba(184,199,219,.75);
  font-size:12px;
  text-align:center;
}

/* iframe */
.iframeWrap{
  margin-top:14px;
  border-radius:18px;
  border:1px solid rgba(103,212,255,.14);
  background:linear-gradient(180deg, rgba(255,255,255,.04), rgba(255,255,255,.02));
  box-shadow:var(--shadow-soft);
  overflow:hidden;
}

.iframeWrap iframe{
  width:100%;
  height:520px;
  border:0;
  display:block;
  background:#fff;
}

/* mini preview */
.miniPreview{
  margin-top:14px;
  border-radius:18px;
  border:1px solid rgba(103,212,255,.14);
  background:linear-gradient(180deg, rgba(255,255,255,.04), rgba(255,255,255,.02));
  box-shadow:var(--shadow-soft);
  overflow:hidden;
}

.miniRow{
  display:flex;
  align-items:center;
  gap:10px;
  padding:12px 14px;
  border-top:1px solid rgba(255,255,255,.08);
}

.miniRow:first-child{
  border-top:none;
}

.miniBadge{
  display:inline-flex;
  min-width:78px;
  justify-content:center;
  padding:6px 10px;
  border-radius:12px;
  border:1px solid rgba(103,212,255,.16);
  background:rgba(0,0,0,.28);
  font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,"Liberation Mono",monospace;
  color:#fff;
  font-size:13px;
}

.miniText{
  flex:1;
  color:rgba(240,247,255,.84);
  font-size:13px;
  line-height:1.45;
}

.miniTag{
  padding:5px 10px;
  border-radius:999px;
  border:1px solid rgba(103,212,255,.22);
  background:rgba(31,182,255,.12);
  color:rgba(223,247,255,.96);
  font-size:12px;
  font-weight:700;
  white-space:nowrap;
}

.btnLink{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:10px 15px;
  border-radius:999px;
  border:1px solid rgba(103,212,255,.28);
  background:linear-gradient(135deg, rgba(15,111,255,.24), rgba(31,182,255,.18));
  color:#eef9ff;
  font-weight:800;
  text-decoration:none;
  box-shadow:0 0 18px rgba(31,182,255,.14);
  transition:.18s ease;
}

.btnLink:hover{
  background:linear-gradient(135deg, rgba(15,111,255,.34), rgba(31,182,255,.24));
  box-shadow:0 0 24px rgba(31,182,255,.20);
  transform:translateY(-1px);
}

.btnLinkGhost{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:10px 14px;
  border-radius:999px;
  border:1px solid rgba(255,255,255,.14);
  background:rgba(255,255,255,.03);
  color:rgba(255,255,255,.92);
  font-weight:600;
  text-decoration:none;
  transition:.18s ease;
}

.btnLinkGhost:hover{
  background:rgba(31,182,255,.08);
  border-color:rgba(103,212,255,.24);
}

/* scrollbar */
::-webkit-scrollbar{
  width:10px;
}

::-webkit-scrollbar-track{
  background:#04101f;
}

::-webkit-scrollbar-thumb{
  background:rgba(31,182,255,.30);
  border-radius:999px;
}

::-webkit-scrollbar-thumb:hover{
  background:rgba(31,182,255,.45);
}

/* responsive */
@media (max-width: 640px){
  .wrap{
    margin:24px auto;
    padding:0 12px 24px;
  }

  .hero,
  .card{
    padding:16px;
    border-radius:16px;
  }

  .iframeWrap iframe{
    height:620px;
  }

  .miniRow{
    flex-wrap:wrap;
    align-items:flex-start;
  }

  .miniTag{
    margin-left:auto;
  }
}

/* print */
@media print{
  body{
    background:#fff;
    color:#000;
  }

  .hero,
  .card,
  .iframeWrap,
  .miniPreview,
  .step{
    background:#fff;
    color:#000;
    border:1px solid #ddd;
    box-shadow:none;
    backdrop-filter:none;
  }

  a{
    color:#000;
    text-decoration:underline;
    text-shadow:none;
  }

  .actions,
  .btn,
  .btnLink,
  .btnLinkGhost,
  .footer{
    display:none !important;
  }

  .kbd{
    background:#f5f5f5;
    color:#000;
    border:1px solid #bbb;
    box-shadow:none;
  }

  .muted,
  .sub,
  .miniText{
    color:#333;
  }
}