:root{
  --bg:#0b1020;
  --bg2:#070a16;
  --text:#e5e7eb;
  --card:rgba(16,22,38,.88);
  --border:rgba(31,42,68,.9);
  --muted:#9aa3b2;
  --accent:#3b82f6;
  --accent2:#60a5fa;
  --shadow:0 14px 40px rgba(0,0,0,.35);
  --shadow2:0 6px 24px rgba(0,0,0,.18);
  --radius:16px;
}

*{box-sizing:border-box}

html,body{height:100%}

body{
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, Helvetica, sans-serif;
  background:
    radial-gradient(1200px 600px at 50% -10%, rgba(59,130,246,.18), transparent 60%),
    radial-gradient(900px 500px at 100% 10%, rgba(96,165,250,.10), transparent 60%),
    radial-gradient(900px 500px at 0% 30%, rgba(59,130,246,.08), transparent 60%),
    linear-gradient(180deg, var(--bg2), var(--bg));
  color:var(--text);
  margin:0;
  padding:24px 14px 70px;
}

a{color:var(--accent2);text-decoration:none}
a:hover{text-decoration:underline}

.container{max-width:980px;margin:0 auto}

h1{
  text-align:center;
  margin:0 0 10px;
  font-size:34px;
  letter-spacing:-.3px;
  font-weight:800;
}

h2{
  margin:0 0 10px;
  font-size:20px;
  font-weight:750;
}

p{margin:10px 0 0}

.card{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--radius);
  padding:20px;
  margin:16px 0;
  box-shadow:var(--shadow2);
  backdrop-filter: blur(10px);
}

.row{
  display:flex;
  gap:10px;
  flex-wrap:wrap;
  align-items:center;
}

button{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:10px 14px;
  border:0;
  border-radius:12px;
  background:linear-gradient(180deg, var(--accent2), var(--accent));
  color:#fff;
  cursor:pointer;
  font-weight:700;
  transition:transform .06s ease, filter .12s ease, opacity .12s ease;
}

button:hover{filter:brightness(1.04)}
button:active{transform:translateY(1px)}
button:focus-visible{outline:2px solid rgba(96,165,250,.75); outline-offset:2px}

button[disabled]{opacity:.55;cursor:not-allowed;filter:none}

button.secondary{
  background:linear-gradient(180deg, #7b8291, #6b7280);
}

button.ghost{
  background:transparent;
  border:1px solid var(--border);
  color:var(--text);
}

.muted{color:var(--muted);font-size:14px}

#drop{
  border:2px dashed rgba(96,165,250,.85);
  background:rgba(59,130,246,.06);
  border-radius:var(--radius);
  padding:26px 18px;
  text-align:center;
  transition:background .12s ease, border-color .12s ease, transform .06s ease;
}

#drop p{margin:0;font-weight:650;color:rgba(229,231,235,.92)}
#drop button.ghost{border-color:rgba(96,165,250,.35)}

#drop.drag{
  background:rgba(59,130,246,.12);
  border-color:rgba(96,165,250,1);
  transform:translateY(-1px);
}

#preview{
  background:#fff;
  color:#000;
  border-radius:12px;
  padding:18px;
  max-height:75vh;
  overflow:auto;
  margin-top:12px;
  box-shadow:var(--shadow);
}

.invoice-wrap{
  max-width:794px;
  margin:0 auto;
  background:#fff;
  color:#000;
}

/* SEO içerik bölümünü daha okunur yap */
.seo-content{
  max-width:900px;
  margin:44px auto;
  line-height:1.8;
}

.seo-content h2{
  margin-top:28px;
  font-size:22px;
}

.seo-content ul{
  margin:12px 0 0;
  padding:0;
  list-style:none;
  columns:2;
  column-gap:22px;
}

.seo-content li{
  break-inside:avoid;
  margin:7px 0;
}

.seo-content li a{
  display:inline-block;
  padding:6px 10px;
  border-radius:10px;
  border:1px solid rgba(31,42,68,.65);
  background:rgba(15,22,40,.55);
  text-decoration:none;
}

.seo-content li a:hover{
  text-decoration:none;
  border-color:rgba(96,165,250,.75);
  background:rgba(59,130,246,.10);
}

@media (max-width:820px){
  h1{font-size:28px}
  .card{padding:16px;border-radius:14px}
  #drop{padding:22px 14px}
  .seo-content ul{columns:1}
}

/* PRINT */
@media print{
  body{background:#fff;color:#000;margin:0;padding:0}
  .no-print,.card:not(#invoice-card){display:none !important}
  #preview{max-height:none;height:auto;overflow:visible;padding:0;margin:0;box-shadow:none}
  .invoice-wrap{margin:0 auto!important;width:210mm;min-height:297mm;padding:10mm;page-break-inside:avoid}
}

@media print{
  .invoice-wrap{width:188mm!important;box-sizing:border-box}
  table{border-collapse:collapse!important;width:100%!important;box-sizing:border-box}
  th,td{border:0.6pt solid #000!important;page-break-inside:avoid}
}