:root {
  --bg: #0f172a;
  --card: #111827;
  --muted: #1f2937;
  --border: #334155;
  --text: #e5e7eb;
  --sub: #94a3b8;
  --accent: #6366f1;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, "Helvetica Neue", Noto Sans, sans-serif;
  font-size: 18px;
  display: flex;
  flex-direction: column;
}

h1 {
  text-align: center;
  font-size: 2rem;
  margin: 22px 0;
}

h2 {
  font-size: 1.2rem;
  margin: 16px;
  color: var(--sub);
}

.wrap {
  max-width: 1100px;
  margin: 0 auto;
  padding: 10px 14px 28px;
  flex: 1 0 auto
}

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 16px;
  box-shadow: 0 6px 18px rgba(0, 0, 0, .25)
}

.toolbar {
  display: flex;
  gap: 14px;
  align-items: flex-end;
  flex-wrap: wrap
}

label {
  font-size: 1rem;
  color: var(--sub);
  display: flex;
  flex-direction: column;
  gap: 6px
}

input[type="text"],
input[type="number"],
input[type="date"],
input[type="file"] {
  background: var(--muted);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 12px 14px;
  min-width: 140px;
  outline: none;
  font-size: 1rem;
}

button {
  appearance: none;
  border: none;
  background: var(--accent);
  color: white;
  border-radius: 12px;
  padding: 10px 14px;
  cursor: pointer;
  font-weight: 700;
  font-size: 0.95rem;
  white-space: nowrap;
}

button:hover {
  filter: brightness(1.1)
}

.columns {
  display: flex;
  gap: 22px;
  margin-top: 16px;
  flex-wrap: wrap
}

.column {
  flex: 1 1 360px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--muted);
  padding: 14px
}

.column h3 {
  text-align: center;
  margin-top: 0;
  font-size: 1.2rem
}

.summary {
  margin-top: 18px
}

.late {
  color: #f97373;
  font-weight: 700;
}

.footer {
  text-align: center;
  color: var(--sub);
  padding: 14px 10px 22px;
  border-top: 1px solid var(--border);
  font-size: 0.95rem;
  flex: 0 0 auto;
}

@media (max-width: 640px) {
  body {
    font-size: 17px
  }

  h1 {
    font-size: 1.6rem
  }

  .wrap {
    padding: 8px
  }

  input,
  button {
    font-size: 1rem
  }
}