:root{
  --bg:#f7f9fc;
  --card:#ffffff;
  --text:#0f172a;
  --muted:#64748b;
  --primary:#2f6ae2;       /* matches your blue button tone */
  --primary-600:#2557bd;
  --ring:#e5e7eb;
}

*{box-sizing:border-box}
html,body{
  margin:0;
  padding:0;
  background:var(--bg);
  color:var(--text);
  font-family:"Nunito",system-ui,-apple-system,Segoe UI,Roboto,Ubuntu,"Helvetica Neue",Arial,"Noto Sans",sans-serif;
}

.tool-wrap{
  max-width: 1100px;
  margin: 40px auto;
  padding: 0 16px;
}

.tool-card{
  background:var(--card);
  border:1px solid var(--ring);
  border-radius:18px;
  box-shadow: 0 10px 30px rgba(2,6,23,.06);
  padding: 28px;
  margin-bottom: 20px;
}

.tool-title{
  font-size: clamp(22px, 2.7vw, 34px);
  margin: 4px 0 18px;
  font-weight: 800;
  letter-spacing:.2px;
}

.tool-title .muted{ color: var(--muted); font-weight:600; }

.form-grid{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap:16px;
  margin-top:8px;
}

.form-field{
  display:flex;
  flex-direction:column;
}

label{
  font-size:14px;
  font-weight:700;
  color:var(--muted);
  margin-bottom:6px;
}

input[type="text"], input[type="number"], select{
  width:100%;
  height:48px;
  border:1px solid var(--ring);
  border-radius:12px;
  padding:0 14px;
  font-size:16px;
  background:#fff;
  outline:none;
  transition:border-color .15s ease, box-shadow .15s ease;
}

input:focus, select:focus{
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(47,106,226,.12);
}

.form-actions{
  grid-column: 1 / -1;
  margin-top: 4px;
}

.btn-primary{
  display:inline-flex; align-items:center; justify-content:center;
  background:var(--primary);
  color:#fff; border:none; border-radius:12px;
  height:52px; padding:0 22px;
  font-weight:800; font-size:16px;
  cursor:pointer;
  box-shadow: 0 8px 18px rgba(47,106,226,.25);
  transition: transform .06s ease, background .15s ease, box-shadow .15s ease;
}
.btn-primary:hover{ background:var(--primary-600) }
.btn-primary:active{ transform: translateY(1px) }

.results{
  margin-top:28px;
  border-top:1px dashed var(--ring);
  padding-top:18px;
}

.section-title{
  font-size: clamp(18px, 2.2vw, 22px);
  margin: 18px 0 10px;
  font-weight:800;
}

.table-wrap{
  overflow:auto;
  border:1px solid var(--ring);
  border-radius:12px;
  background:#fff;
  margin-bottom:14px;
}

.table{
  width:100%;
  border-collapse: collapse;
  min-width: 520px;
}
.table th, .table td{
  padding:12px 14px;
  border-bottom:1px solid var(--ring);
  text-align:left;
  font-size:15px;
}
.table th{
  background:#fafafa;
  color:#111827;
  font-weight:800;
}
.table tr:last-child th, .table tr:last-child td{ border-bottom:none; }

.btn-group{
  display:flex; gap:10px; flex-wrap:wrap; margin-top:10px;
}
.btn-outline{
  background:#fff; color:var(--primary);
  border:1px solid var(--primary);
  height:44px; border-radius:10px; padding:0 16px;
  font-weight:800; cursor:pointer;
  transition: background .15s ease, color .15s ease;
}
.btn-outline:hover{ background:var(--primary); color:#fff }

/* Toast / Notification */
.toast{
  position: fixed;
  top: 18px;
  right: 18px;
  background: #10b981;
  color: #fff;
  padding: 12px 16px;
  border-radius: 10px;
  box-shadow: 0 10px 25px rgba(16,185,129,.35);
  font-weight: 800;
  opacity: 0;
  transform: translateY(-8px);
  pointer-events: none;
  transition: opacity .18s ease, transform .18s ease;
  z-index: 9999;
}
.toast.show{
  opacity: 1;
  transform: translateY(0);
}

/* Hide elements dynamically */
.hidden{ display: none !important; }

/* Mono output block */
.mono-block{
  background:#f8fafc;
  border:1px solid var(--ring);
  border-radius:12px;
  padding:14px;
  font-family: ui-monospace, monospace;
  word-break: break-all;
  cursor: pointer;
}

/* Mobile */
@media (max-width: 880px){
  .form-grid{ grid-template-columns: 1fr; }
  .form-actions{ margin-top:6px; }
}








/* --- Inputs: slim, cleaner --- */
.input-lg{
  height:44px !important;         
  padding:0 14px !important;
  font-size:15px !important;
  border-radius:10px !important;
  line-height:44px !important;
}
select.input-lg{
  padding-right:34px !important;
}


/* invalid state */
.is-invalid{
  border-color:#ef4444 !important;
  box-shadow:0 0 0 4px rgba(239,68,68,.12) !important;
}

/* helper text under inputs */
.input-hint{
  font-size:12px;
  color:var(--muted);
  margin-top:6px;
}

/* result mono block tweak */
.mono-block{
  background:#f8fafc;
  border:1px solid var(--ring);
  border-radius:12px;
  padding:14px;
  font-family: ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,"Liberation Mono","Courier New",monospace;
  word-break: break-all;
  cursor: pointer;
}