:root {
  --bg: #0f172a;
  --card: #1e293b;
  --line: #334155;
  --text: #e2e8f0;
  --muted: #94a3b8;
  --ok: #16a34a;
  --warn: #f59e0b;
  --danger: #dc2626;
  --accent: #0ea5e9;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: "Segoe UI", Arial, sans-serif;
  background: linear-gradient(180deg, #020617, var(--bg));
  color: var(--text);
  line-height: 1.5;
}

.hero {
  padding: 2.5rem 1rem 1.5rem;
  text-align: center;
  border-bottom: 1px solid var(--line);
}

.hero h1 {
  margin: 0;
  font-size: clamp(2rem, 4vw, 3rem);
}

.container {
  width: min(980px, 94%);
  margin: 1.2rem auto 2rem;
  display: grid;
  gap: 1rem;
}

.card {
  background: color-mix(in srgb, var(--card) 92%, black);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 1rem;
}

h2 {
  margin: 0 0 .75rem;
  font-size: 1.2rem;
}

.form-grid {
  display: grid;
  gap: .7rem;
}

label { display: grid; gap: .3rem; color: var(--muted); }

input, select, textarea, button {
  font: inherit;
  border-radius: 10px;
  border: 1px solid var(--line);
  padding: .65rem .75rem;
}

input, select, textarea {
  background: #0b1220;
  color: var(--text);
}

button {
  background: var(--accent);
  color: white;
  border: none;
  cursor: pointer;
}

button.secondary {
  background: #475569;
}

button.danger {
  background: var(--danger);
}

.btn-row {
  display: flex;
  gap: .5rem;
  flex-wrap: wrap;
}

.status {
  margin-top: .7rem;
  padding: .5rem .65rem;
  border-radius: 8px;
  background: #0b1220;
}

.filters {
  margin-top: .9rem;
  display: grid;
  gap: .5rem;
  grid-template-columns: 1fr 190px;
}

.task-list, .checklist, .alerts {
  margin: .7rem 0 0;
  padding-left: 1.1rem;
}

.task-list { list-style: none; padding: 0; }

.task-item {
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: .75rem;
  margin-bottom: .6rem;
  background: #0b1220;
}

.task-item.done { border-color: var(--ok); opacity: .92; }

.task-meta {
  color: var(--muted);
  font-size: .9rem;
}

.task-actions {
  display: flex;
  gap: .4rem;
  margin-top: .6rem;
  flex-wrap: wrap;
}

.alerts li {
  margin-bottom: .4rem;
  color: var(--warn);
}

@media (max-width: 700px) {
  .filters { grid-template-columns: 1fr; }
}