:root {
  --bg: #05060a;
  --card: rgba(255, 255, 255, 0.05);
  --card-strong: rgba(255, 255, 255, 0.08);
  --text: #f5f7fb;
  --muted: #9ba0b5;
  --primary: #7cffb2;
  --primary-strong: #42f28f;
  --stroke: rgba(255, 255, 255, 0.08);
  --shadow: 0 20px 50px rgba(0, 0, 0, 0.35);
  --radius: 18px;
  --radius-sm: 12px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: 'Space Grotesk', 'Inter', system-ui, -apple-system, sans-serif;
  background: radial-gradient(circle at 20% 20%, rgba(124, 255, 178, 0.08), transparent 35%),
              radial-gradient(circle at 80% 0%, rgba(70, 116, 255, 0.08), transparent 30%),
              var(--bg);
  color: var(--text);
  overflow-x: hidden;
}

.bg-grid {
  position: fixed;
  inset: 0;
  background-image: linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 24px 24px;
  mask-image: radial-gradient(ellipse at center, rgba(0,0,0,0.8) 0%, transparent 70%);
  pointer-events: none;
}

.shell {
  position: relative;
  max-width: 1100px;
  margin: 0 auto;
  padding: 32px 20px 64px;
  z-index: 1;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 28px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 600;
  letter-spacing: 0.2px;
}

.brand .dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: linear-gradient(135deg, #76ffb4, #4691ff);
  box-shadow: 0 0 16px rgba(124, 255, 178, 0.8);
}

.pill {
  padding: 8px 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid var(--stroke);
  color: var(--muted);
  font-size: 12px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 20px;
  align-items: stretch;
  margin-bottom: 28px;
}

.eyebrow {
  text-transform: uppercase;
  font-size: 12px;
  letter-spacing: 0.4px;
  color: var(--muted);
  margin: 0 0 6px;
}

h1 {
  margin: 0 0 12px;
  font-size: clamp(28px, 4vw, 38px);
  line-height: 1.1;
}

.lede { color: var(--muted); margin: 0 0 18px; max-width: 620px; }

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

.btn {
  border: none;
  border-radius: 14px;
  padding: 14px 18px;
  font-weight: 600;
  cursor: pointer;
  transition: transform 0.1s ease, box-shadow 0.1s ease, background 0.2s ease;
  color: #0a0d12;
}

.btn.primary {
  background: linear-gradient(135deg, var(--primary), var(--primary-strong));
  box-shadow: 0 12px 30px rgba(124, 255, 178, 0.25);
}

.btn.ghost {
  color: var(--text);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--stroke);
}

.btn.block { width: 100%; }
.btn:active { transform: translateY(1px); }

.glass.card {
  background: var(--card);
  border: 1px solid var(--stroke);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(8px);
}

.stats { display: grid; gap: 12px; align-content: start; }
.stat { display: flex; align-items: center; justify-content: space-between; padding: 12px 14px; border-radius: var(--radius-sm); background: var(--card-strong); border: 1px solid var(--stroke); }
.stat .label { color: var(--muted); }
.stat .value { font-weight: 700; font-size: 18px; }
.hint { color: var(--muted); font-size: 13px; }

.grid { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.9fr); gap: 20px; }

.card-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 14px; }

.chip { padding: 8px 12px; border-radius: 999px; background: rgba(124, 255, 178, 0.08); border: 1px solid rgba(124, 255, 178, 0.4); color: #b7ffda; font-size: 12px; }

.field-group { margin-bottom: 16px; }
.label { margin: 0 0 8px; font-weight: 600; }
.label-row { display: flex; justify-content: space-between; align-items: center; }

.segmented { display: inline-flex; padding: 4px; background: rgba(255, 255, 255, 0.06); border: 1px solid var(--stroke); border-radius: 12px; gap: 4px; }
.segmented button { border: none; background: transparent; color: var(--muted); padding: 8px 14px; border-radius: 10px; cursor: pointer; font-weight: 600; }
.segmented button.active { background: linear-gradient(135deg, rgba(124, 255, 178, 0.16), rgba(124, 255, 178, 0.05)); color: var(--text); border: 1px solid rgba(124, 255, 178, 0.6); }

.tabs { display: inline-flex; gap: 6px; background: rgba(255, 255, 255, 0.05); padding: 4px; border-radius: 10px; border: 1px solid var(--stroke); }
.tabs button { border: none; background: transparent; color: var(--muted); padding: 8px 10px; border-radius: 8px; cursor: pointer; font-weight: 600; font-size: 13px; }
.tabs button.active { background: rgba(124, 255, 178, 0.12); color: var(--text); }

.input-wrap { position: relative; }
input[type="number"], input[type="text"] {
  width: 100%;
  padding: 14px 14px 14px 12px;
  border-radius: 12px;
  border: 1px solid var(--stroke);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  font-size: 15px;
}
input:focus { outline: 1px solid rgba(124, 255, 178, 0.5); }
.suffix { position: absolute; right: 12px; top: 50%; transform: translateY(-50%); color: var(--muted); font-weight: 700; }
.note { margin: 6px 0 0; color: var(--muted); font-size: 13px; }
.status { min-height: 18px; margin-top: 10px; color: var(--muted); font-size: 14px; }

.tips ul { list-style: none; padding: 0; margin: 0 0 14px; display: grid; gap: 10px; }
.tips li { color: var(--muted); line-height: 1.4; }

.cta-mini { display: flex; justify-content: space-between; align-items: center; background: rgba(255, 255, 255, 0.05); border: 1px solid var(--stroke); padding: 12px 14px; border-radius: 12px; }
.link { color: var(--primary); text-decoration: none; font-weight: 600; }

.result { margin-top: 24px; }
.result .actions { gap: 10px; }
.result .btn { text-decoration: none; text-align: center; }

@media (max-width: 960px) {
  .hero { grid-template-columns: 1fr; }
  .grid { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .shell { padding: 24px 18px 52px; }
  .topbar { margin-bottom: 18px; }
  .hero { margin-bottom: 18px; }
  .card-head { flex-direction: column; align-items: flex-start; gap: 6px; }
}