:root{
  --bg:#0b1220;
  --card:#111a2b;
  --muted:#93a4c7;
  --text:#e8eefc;
  --line:rgba(255,255,255,.10);
  --accent:#48a7ff;
  --accent2:#6ee7ff;
  --danger:#ff6b6b;
  --ok:#2ee59d;
  --shadow: 0 10px 30px rgba(0,0,0,.35);
  --radius:16px;
}

.ntcalc *{ box-sizing:border-box; }
.ntcalc{
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  color:var(--text);
}

.ntcalc .wrap{
  max-width: 980px;
  margin: 0 auto;
  padding: 28px 16px 60px;
  background: radial-gradient(1200px 600px at 20% 0%, rgba(72,167,255,.25), transparent 60%),
              radial-gradient(900px 500px at 100% 10%, rgba(110,231,255,.16), transparent 55%),
              var(--bg);
  border-radius: 18px;
}

.ntcalc header{ margin-bottom: 18px; }

.ntcalc h1{
  margin:0 0 8px 0;
  font-size: clamp(22px, 3vw, 34px);
  letter-spacing: .2px;
}

.ntcalc .sub{
  margin:0;
  color: var(--muted);
  font-size: 14.5px;
  max-width: 70ch;
}

.ntcalc .grid{
  display:grid;
  grid-template-columns: 1fr;
  gap:14px;
  margin-top: 18px;
}

@media(min-width: 800px){
  .ntcalc .grid{
    grid-template-columns: 1.3fr 0.7fr;
    align-items:start;
  }
}

.ntcalc .card{
  background: linear-gradient(180deg, rgba(255,255,255,.06), rgba(255,255,255,.03));
  border:1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow:hidden;
}

.ntcalc .card .inner{
  padding: 18px;
}

.ntcalc .section-title{
  font-size: 14px;
  letter-spacing:.35px;
  text-transform: uppercase;
  color: var(--muted);
  margin:0 0 10px 0;
}

.ntcalc label{
  display:block;
  font-size: 13.5px;
  color: var(--muted);
  margin-bottom: 6px;
}

.ntcalc select,
.ntcalc input{
  width: 100%;
  padding: 12px 12px;
  border-radius: 12px;
  border:1px solid var(--line);
  background: rgba(0,0,0,.20);
  color: var(--text);
  outline: none;
}

.ntcalc input::placeholder{
  color: rgba(232,238,252,.45);
}

/* Hide number spinners */
.ntcalc input[type=number]::-webkit-outer-spin-button,
.ntcalc input[type=number]::-webkit-inner-spin-button{
  -webkit-appearance: none;
  margin: 0;
}
.ntcalc input[type=number]{
  -moz-appearance: textfield;
  appearance: textfield;
}

/* ===== Rowline ===== */
.ntcalc .ct-rowline{
  display:grid;
  grid-template-columns: 1fr;
  gap:12px;
  padding: 12px;
  border-radius: 12px;
  border:1px solid var(--line);
  background: rgba(0,0,0,.14);
}

@media(min-width: 520px){
  .ntcalc .ct-rowline{
    grid-template-columns: 1.4fr 0.6fr;
    align-items:end;
  }
}

/* ===== Buttons ===== */
.ntcalc .btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:100%;
  padding: 12px 14px;
  border:none;
  border-radius: 12px;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  color: #07101f;
  font-weight: 700;
  cursor:pointer;
  box-shadow: 0 8px 20px rgba(72,167,255,.25);
}

.ntcalc .btn.ct-clear{
  background: rgba(255,255,255,.06);
  color: var(--text);
  border:1px solid var(--line);
  box-shadow:none;
}

/* ===== Results ===== */
.ntcalc .out{
  padding: 16px;
  border-radius: 14px;
  border:1px solid var(--line);
  background: rgba(0,0,0,.18);
}

.ntcalc .ct-result-block{
  background: linear-gradient(145deg, rgba(255,255,255,0.03), rgba(255,255,255,0.01));
  border:1px solid rgba(120,170,255,.25);
  border-radius:14px;
  padding:18px 20px;
  margin-bottom:18px;
}

.ntcalc .pill{
  display:inline-flex;
  align-items:center;
  padding:6px 10px;
  border-radius:999px;
  border:1px solid var(--line);
  background: rgba(255,255,255,.05);
  font-size:12.5px;
  margin-top:8px;
}

/* ===== Help Button ===== */
.ntcalc .ct-help-link{
  border:1px solid rgba(72,167,255,.35);
  background: rgba(72,167,255,.10);
  color: var(--text);
  padding:8px 10px;
  border-radius:10px;
  font-size:12.5px;
  cursor:pointer;
}

/* ===== Modal ===== */
body.ct-modal-open{
  overflow: hidden !important;
}

.ntcalc .ct-modal{
  position: fixed !important;
  inset: 0 !important;
  display: none !important;
  z-index: 999999 !important;
}

.ntcalc .ct-modal.is-open{
  display: block !important;
}

.ntcalc .ct-modal-backdrop{
  position:absolute !important;
  inset:0 !important;
  background: rgba(0,0,0,.60) !important;
}

.ntcalc .ct-modal-panel{
  position: fixed !important;
  top:50% !important;
  left:50% !important;
  transform: translate(-50%, -50%) !important;
  width:min(720px, calc(100% - 28px)) !important;
  max-height:78vh !important;
  overflow:auto !important;
  background: linear-gradient(180deg, rgba(255,255,255,.08), rgba(255,255,255,.03)) !important;
  border:1px solid rgba(255,255,255,.12) !important;
  border-radius:16px !important;
  box-shadow:0 18px 50px rgba(0,0,0,.55) !important;
  padding:18px !important;
}

.ntcalc .ct-modal-title{
  margin:0 0 10px 0 !important;
  font-size:18px !important;
}

.ntcalc .ct-modal-close{
  position: sticky !important;
  top:0 !important;
  float:right !important;
  width:36px !important;
  height:36px !important;
  border-radius:10px !important;
  border:1px solid rgba(255,255,255,.14) !important;
  background: rgba(0,0,0,.18) !important;
  color: var(--text) !important;
  cursor:pointer !important;
  font-size:20px !important;
}

.ntcalc .ct-modal-list{
  margin:0 !important;
  padding-left:18px !important;
}

.ntcalc .ct-modal-foot{
  margin-top:14px !important;
  display:flex !important;
  justify-content:flex-end !important;
}


/* FIX: CTA buttons visible/styled on desktop */
.ntcalc .cta{
  display:flex;
  flex-direction:column;
  gap:10px;
  margin-top:14px;
}

.ntcalc .cta a{
  text-decoration:none;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:12px 14px;
  border-radius:12px;
  border:1px solid var(--line);
  color: var(--text);
  background: rgba(255,255,255,.04);
}

.ntcalc .cta a.primary{
  background: rgba(72,167,255,.12);
  border-color: rgba(72,167,255,.35);
}

/* προαιρετικά για hover */
.ntcalc .cta a:hover{
  border-color: rgba(255,255,255,.22);
  background: rgba(255,255,255,.06);
}