:root {
  --bg: #0f2c2c;
  --card: #143a3a;
  --accent: #f0c36a;
  --text: #f4fff8;
  color-scheme: dark;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  font-size: 16px;
  line-height: 1.4;
}

main {
  width: 100%;
  max-width: 390px;
  margin: 0 auto;
  padding: 20px 16px 40px;
}

header p {
  margin: 0 0 16px;
}

h1, h2 { font-weight: 700; }

h1 {
  margin: 0 0 4px;
  font-size: 2rem;
  letter-spacing: -0.03em;
}

h2 {
  margin: 0 0 12px;
  font-size: 1.05rem;
}

.card {
  background: var(--card);
  border: 1px solid rgba(240, 195, 106, 0.28);
  border-radius: 14px;
  padding: 14px;
  margin-bottom: 12px;
}

.fields, .person {
  display: grid;
  gap: 10px;
}

label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.875rem;
  font-weight: 600;
}

input, button { font: inherit; }

input {
  width: 100%;
  min-height: 44px;
  padding: 8px 10px;
  color: var(--text);
  background: var(--bg);
  border: 1px solid rgba(244, 255, 248, 0.28);
  border-radius: 8px;
}

button {
  min-height: 44px;
  padding: 8px 12px;
  color: var(--text);
  background: transparent;
  border: 1px solid rgba(240, 195, 106, 0.75);
  border-radius: 10px;
  cursor: pointer;
}

button.primary {
  width: 100%;
  margin-top: 4px;
  color: var(--bg);
  background: var(--accent);
  border-color: var(--accent);
  font-weight: 700;
}

#add { width: 100%; }

button:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

input:focus,
button:focus {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}

.person + .person {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid rgba(244, 255, 248, 0.12);
}

.person .remove { width: 100%; }

#result h2:last-of-type { margin-top: 16px; }

.line {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 6px 0;
}

.line span:first-child { overflow-wrap: anywhere; }

.line span:last-child {
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.line.total {
  margin-top: 4px;
  padding-top: 8px;
  border-top: 1px solid rgba(240, 195, 106, 0.5);
  color: var(--accent);
  font-weight: 700;
}

#error {
  margin: 12px 0 0;
  padding: 10px 12px;
  color: #ffd7d7;
  background: #3a1818;
  border-radius: 8px;
}

@media (min-width: 1280px) {
  main {
    max-width: 880px;
    padding: 40px 32px 64px;
  }

  .fields {
    grid-template-columns: 1.4fr 1fr 1fr;
  }

  .person {
    grid-template-columns: 1fr 8rem auto;
    align-items: end;
  }

  .person .remove {
    width: auto;
  }
}