:root {
  --bg: #ffffff;
  --card: #f9f9fb;
  --ink: #222222;
  --muted: #5b6470;
  --stroke: #e5e7eb;

  --c1: #6ea8fe;
  --c2: #8a75ff;
  --c3: #2dd4bf;

  --accent: #6ea8fe;
  --radius: 10px;
  --gap: 16px;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Arial, "Noto Sans";
  background: var(--bg);
  color: var(--ink);
}

/* Header line */
.accent-line {
  height: 3px;
  background: linear-gradient(90deg, var(--c1), var(--c2), var(--c3));
}

/* Header */
.app-header {
  max-width: 1000px;
  margin: 16px auto 8px;
  padding: 8px 16px 0;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.app-header img {
  width: 72px;
  height: 72px;
  object-fit: contain;
}
.tagline {
  margin: 10px 0 0;
  font-size: 14px;
  color: var(--muted);
  padding: 6px 10px;
  border-radius: 999px;
  background:
    linear-gradient(#fff, #fff) padding-box,
    linear-gradient(90deg, var(--c1), var(--c2), var(--c3)) border-box;
  border: 1px solid transparent;
}

/* Layout */
.container {
  max-width: 1000px;
  margin: 0 auto 40px;
  padding: 8px 16px 24px;
  display: grid;
  gap: var(--gap);
}
.row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--gap);
}
.card {
  background: var(--card);
  border: 1px solid var(--stroke);
  border-radius: var(--radius);
  padding: 12px;
  box-shadow: 0 6px 18px rgba(20, 20, 40, 0.05);
  position: relative;
}
.card::before {
  content: "";
  position: absolute;
  left: 10px; right: 10px; top: -1px; height: 3px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--c1), var(--c2), var(--c3));
  opacity: 0.6;
}
.card.centered { display: grid; place-items: center; }
.buttons-wrap {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  justify-content: center;
}

/* Inputs */
.label { display: block; font-weight: 650; margin-bottom: 6px; font-size: 14px; }
.label-sm { font-size: 13px; color: var(--muted); margin: 8px 0 4px; display: inline-block; }
.input {
  width: 100%;
  background: #fff;
  color: var(--ink);
  border: 1px solid var(--stroke);
  border-radius: 8px;
  padding: 8px 10px;
  font-size: 14px;
  outline: none;
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
}
.input:focus {
  border-color: transparent;
  box-shadow:
    0 0 0 2px #fff,
    0 0 0 4px var(--accent),
    0 3px 10px rgba(20, 20, 40, 0.05);
}
.inline-group { margin-top: 6px; }
.hint {
  display: block;
  color: var(--muted);
  font-size: 12px;
  margin-top: 6px;
}

/* Buttons */
.btn-accent {
  border: none;
  border-radius: 999px;
  padding: 10px 22px;
  font-weight: 700;
  font-size: 14px;
  color: #0b1220;
  background: linear-gradient(90deg, var(--c1), var(--c2), var(--c3));
  cursor: pointer;
  transition: transform 0.04s ease, box-shadow 0.2s ease, opacity 0.2s ease;
  box-shadow: 0 8px 18px rgba(20, 20, 40, 0.12);
}
.btn-accent:hover { opacity: 0.95; }
.btn-accent:active { transform: translateY(1px); }

.btn-outline {
  border: 2px solid transparent;
  border-radius: 999px;
  padding: 9px 20px;
  font-weight: 700;
  font-size: 14px;
  color: #0b1220;
  background:
    linear-gradient(#fff, #fff) padding-box,
    linear-gradient(90deg, var(--c1), var(--c2), var(--c3)) border-box;
  cursor: pointer;
  transition: transform 0.04s ease, box-shadow 0.2s ease, opacity 0.2s ease;
  box-shadow: 0 8px 18px rgba(20, 20, 40, 0.06);
}
.btn-outline:hover { opacity: 0.95; }
.btn-outline:active { transform: translateY(1px); }

/* Totals */
.results-card .totals {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px 22px;
  align-items: start;
}
.totals-label {
  display: inline-block;
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 4px;
}
.totals-value {
  font-size: 28px;
  font-weight: 800;
}
.totals-value.secondary {
  font-size: 22px;
  font-weight: 700;
  color: #334155;
}

/* Footer */
.app-footer {
  border-top: 1px solid var(--stroke);
  padding: 14px 16px 30px;
  color: var(--muted);
  font-size: 12px;
  max-width: 1000px;
  margin: 0 auto;
  text-align: center;
}

/* Responsive */
@media (max-width: 840px) {
  .row { grid-template-columns: 1fr; }
  .app-header img { width: 60px; height: 60px; }
  .tagline { font-size: 13px; }
  .results-card .totals { grid-template-columns: 1fr; }
}

/* ===== Print styles ===== */
.print-sheet { display: none; }

@media print {
  .accent-line,
  .app-header,
  .container,
  .app-footer {
    display: none !important;
  }

  .print-sheet {
    display: block !important;
    padding: 18mm 16mm;
    color: #000;
    background: #fff;
  }

  .ps-head {
    display: grid;
    grid-template-columns: 64px 1fr;
    gap: 12px;
    align-items: center;
  }
  .ps-head img {
    width: 64px; height: 64px; object-fit: contain;
  }
  .ps-head h2 {
    margin: 0;
    font-size: 20px;
    font-weight: 800;
  }
  .ps-meta {
    margin: 4px 0 0;
    color: #444;
    font-size: 12px;
  }

  .ps-line {
    height: 1px;
    background: #ddd;
    margin: 14px 0;
  }

  .ps-totals {
    font-size: 15px;
  }
  .ps-row {
    display: flex;
    justify-content: space-between;
    padding: 4px 0;
  }
  .ps-row strong {
    font-size: 18px;
  }

  .ps-info {
    margin-top: 16px;
    font-size: 13px;
  }
  .ps-info div {
    display: flex;
    justify-content: space-between;
    padding: 4px 0;
  }

  .ps-note {
    margin-top: 16px;
    color: #555;
    font-size: 11px;
  }
}

.donate-bar {
  display: flex;
  gap: 12px;
  align-items: center;
  justify-content: center;
  margin-top: 12px;
  padding-top: 8px;
  border-top: 1px dashed rgba(0,0,0,.12);
}

.btn-donate {
  width: 44px;
  height: 44px;
  border-radius: 9999px;
  display: grid;
  place-items: center;
  background: #fff;
  border: 1px solid rgba(0,0,0,.08);
  box-shadow: 0 2px 8px rgba(0,0,0,.06);
  transition: transform .15s ease, box-shadow .15s ease;
  text-decoration: none;
}

.btn-donate:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(0,0,0,.10);
}

.btn-donate svg { display: block; }

.btn-donate.kofi svg path:first-child { fill: #ff5e5b; }   /* cup */
.btn-donate.paypal svg path { fill: #003087; }            /* PP */
@media (prefers-color-scheme: dark) {
  .btn-donate { background: #0f1115; border-color: rgba(255,255,255,.08); }
  .donate-bar { border-top-color: rgba(255,255,255,.14); }
}