/* Base */
*{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#EEF3FF; --card:#fff; --ink:#101828; --muted:#667085;
  --primary:#3B82F6; --primary-contrast:#fff; --border:#E5E7EB;
  --shadow:0 10px 25px -12px rgba(16,24,40,.15);
  --radius:14px; --radius-sm:10px; --space:clamp(16px,2.5vw,24px);
}
html,body{height:100%;font-family:ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans";color:var(--ink);background:var(--bg);line-height:1.55}
.email-calculator{max-width:1040px;margin:0 auto;padding:calc(var(--space)*1.5) var(--space)}

/* Header */
.calculator-header{ text-align:center; display:flex; flex-direction:column; align-items:center; margin-bottom:calc(var(--space) * 1.25) }
.calculator-icon{width:56px;height:56px;margin:0 auto 10px;display:grid;place-items:center;border-radius:50%;color:var(--primary-contrast);background:var(--primary)}
.calculator-title{font-size:clamp(26px,2.8vw,36px);font-weight:800;letter-spacing:.2px;margin-bottom:6px}
.calculator-subtitle{ text-align:center; color:var(--muted); max-width:760px; margin:0 auto }

/* Card */
.calculator-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:calc(var(--space)*1.1);margin-top:var(--space);box-shadow:var(--shadow)}

/* Tooltip info icon */
.info{
  display:inline-flex; align-items:center; justify-content:center;
  width:18px;height:18px; margin-left:6px; border-radius:50%;
  font-size:12px; font-weight:800; color:#1D4ED8; background:#E8F0FF; cursor:default; position:relative;
}
.info::after{
  content: attr(data-tip);
  position:absolute; left:50%; transform:translateX(-50%) translateY(6px);
  min-width:240px; max-width:320px; padding:10px 12px; border-radius:10px;
  background:#111; color:#fff; font-size:12px; line-height:1.4;
  box-shadow:var(--shadow); opacity:0; pointer-events:none; transition:opacity .15s ease, transform .15s ease;
  white-space:pre-line; z-index:20;
}
.info:hover::after{ opacity:1; transform:translateX(-50%) translateY(10px) }

/* Validation banner */
.validation-banner{
  display:flex; gap:8px; align-items:flex-start;
  background:#F7F9FF; border:1px solid #E5E7EE; border-radius:12px;
  padding:12px 14px; margin-bottom:14px; font-size:14px;
}
.validation-banner.warn{ background:#FFF7ED; border-color:#FED7AA }
.validation-banner strong{ font-weight:800; margin-right:4px }
.validation-banner #missing-fields strong{ font-weight:700 }

/* Form controls */
.form-group{margin-bottom:18px}
.form-label{display:block;font-size:14px;font-weight:700;margin-bottom:8px}
.radio-group{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
.radio-pill{display:flex;gap:10px;align-items:center;padding:10px 12px;border:1px solid var(--border);border-radius:var(--radius-sm);background:#fff;cursor:pointer;user-select:none}
.radio-pill input{appearance:none;width:18px;height:18px;border:2px solid var(--border);border-radius:50%;position:relative}
.radio-pill input:checked{border-color:var(--primary)}
.radio-pill input:checked::after{content:"";position:absolute;inset:4px;background:var(--primary);border-radius:50%}
.radio-pill span{display:flex;flex-direction:column}
.radio-pill strong{font-size:14px}
.radio-pill small{color:var(--muted);font-size:12px}

/* Chips */
.checkbox-chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border:1px solid var(--border);border-radius:9999px;background:#fff;cursor:pointer}
.chip input{width:16px;height:16px}

/* Range sliders */
.range-wrap{padding:10px 8px 2px;border:1px solid var(--border);border-radius:var(--radius-sm);background:#fff}
.range{
  -webkit-appearance:none; width:100%; height:6px; border-radius:8px; outline:none; background:
  linear-gradient(var(--primary),var(--primary)) 0/var(--percent) 100% no-repeat,
  #E5E7EB;
}
.range::-webkit-slider-thumb{
  -webkit-appearance:none; width:22px; height:22px; border-radius:50%; background:#fff; border:3px solid var(--primary); box-shadow:var(--shadow); cursor:pointer;
}
.range::-moz-range-thumb{
  width:20px;height:20px;border-radius:50%;background:#fff;border:3px solid var(--primary);box-shadow:var(--shadow);cursor:pointer;
}
.range-labels{display:flex;justify-content:space-between;color:var(--muted);font-size:12px;margin-top:6px}
.range-readout{margin-top:8px;color:#1F2937}

/* Buttons */
.calculate-btn{margin-top:10px;width:100%;display:inline-flex;align-items:center;justify-content:center;gap:10px;padding:14px 16px;border:none;border-radius:var(--radius-sm);background:var(--primary);color:var(--primary-contrast);font-weight:700;font-size:16px;cursor:pointer;box-shadow:var(--shadow);transition:transform .06s ease,filter .2s ease}
.calculate-btn:hover{filter:brightness(1.05)}
.calculate-btn:active{transform:translateY(1px)}

/* Results */
.results-section{margin-top:calc(var(--space)*1.1)}
.results-section.hidden{display:none}
.results-header{display:flex;gap:10px;align-items:center;justify-content:space-between;flex-wrap:wrap;margin-bottom:8px}
.results-title{font-size:20px;font-weight:800}
.sort-hint{color:var(--muted);font-size:13px}

/* Summary card */
.summary-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);padding:16px}
.summary-top{display:grid;grid-template-columns:1fr auto;gap:16px;align-items:center}
.rec-badge{display:inline-block;background:#E8F0FF;color:#1D4ED8;font-weight:800;padding:6px 10px;border-radius:9999px;font-size:12px;letter-spacing:.3px}
.rec-title{font-size:20px;font-weight:800;margin-top:6px}
.rec-subtitle{color:var(--muted);margin-top:4px}
.recommendation{display:flex;flex-direction:column;gap:2px}

/* Gauge */
.confidence{display:flex;flex-direction:column;align-items:center;gap:6px}
.gauge{
  --pct:80;
  width:92px;height:92px;border-radius:50%;
  background:conic-gradient(var(--primary) calc(var(--pct)*1%), #E5E7EB 0);
  display:grid;place-items:center;color:#111;
  box-shadow:inset 0 0 0 10px #fff, var(--shadow);
}
.gauge span{font-weight:800;font-size:20px}
.gauge-caption{font-size:12px;color:var(--muted)}

/* Summary content grid */
.summary-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin-top:16px}
.panel{background:#F9FAFB;border:1px solid #EEF0F3;border-radius:12px;padding:12px}
.panel h4{font-size:14px;font-weight:800;margin-bottom:8px}
.panel h5{font-size:12px;font-weight:800;margin-top:10px;margin-bottom:6px}
.reason-list,.signal-list,.checklist,.vendor-list,.risk-list{display:grid;gap:8px;padding-left:18px}
.links{padding-left:18px;display:grid;gap:6px}
.links a{color:#1D4ED8;text-decoration:none}
.links a:hover{text-decoration:underline}
.muted{color:var(--muted);font-size:12px}
.secondary{background:#F7F9FF;border:1px dashed #E5E7EE}

/* Action buttons */
.summary-actions{display:flex;gap:10px;justify-content:flex-end;margin-top:12px}
.ghost-btn{background:#fff;border:1px solid var(--border);border-radius:10px;padding:10px 14px;font-weight:700;cursor:pointer;display:inline-flex;align-items:center;gap:8px}
.ghost-btn.alt{background:#F7F9FF}

/* Responsive */
@media (max-width:820px){
  .radio-group{grid-template-columns:1fr}
  .summary-grid{grid-template-columns:1fr}
  .summary-top{grid-template-columns:1fr;justify-items:center;text-align:center}
  .recommendation{align-items:center}
}
@media (max-width:520px){
  .calculator-card{padding:16px}
  .gauge{width:84px;height:84px}
}