:root {
  color-scheme: dark;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --fundo: #090f1f;
  --painel: rgba(17, 24, 39, 0.94);
  --painel-claro: #182238;
  --texto: #f8fafc;
  --texto-suave: #94a3b8;
  --borda: rgba(148, 163, 184, 0.18);
  --destaque: #38bdf8;
  --destaque-forte: #0ea5e9;
  --sucesso: #34d399;
  --perigo: #fb7185;
}

* {
  box-sizing: border-box;
}

[hidden] {
  display: none !important;
}

body {
  min-height: 100vh;
  margin: 0;
  color: var(--texto);
  background:
    radial-gradient(circle at 15% 15%, rgba(14, 165, 233, 0.22), transparent 32rem),
    radial-gradient(circle at 85% 85%, rgba(52, 211, 153, 0.14), transparent 28rem),
    var(--fundo);
}

button,
input {
  font: inherit;
}

button {
  cursor: pointer;
}

.aplicativo {
  display: grid;
  min-height: 100vh;
  place-items: center;
  padding: 32px 16px;
}

.painel {
  width: min(760px, 100%);
  overflow: hidden;
  border: 1px solid var(--borda);
  border-radius: 24px;
  background: var(--painel);
  box-shadow: 0 28px 80px rgba(0, 0, 0, 0.42);
  backdrop-filter: blur(18px);
}

.cabecalho {
  padding: 36px 36px 30px;
  border-bottom: 1px solid var(--borda);
  background: linear-gradient(135deg, rgba(56, 189, 248, 0.13), rgba(52, 211, 153, 0.06));
}

.marca {
  display: inline-block;
  margin-bottom: 12px;
  color: var(--destaque);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(1.8rem, 5vw, 2.65rem);
  letter-spacing: -0.04em;
}

.cabecalho p {
  margin: 10px 0 0;
  color: var(--texto-suave);
}

.conteudo {
  padding: 30px 36px 36px;
}

.formulario {
  display: flex;
  gap: 10px;
}

.formulario input {
  min-width: 0;
  flex: 1;
  padding: 14px 16px;
  color: var(--texto);
  border: 1px solid var(--borda);
  border-radius: 12px;
  outline: none;
  background: rgba(15, 23, 42, 0.82);
  transition: border-color 160ms, box-shadow 160ms;
}

.formulario input:focus {
  border-color: var(--destaque);
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.16);
}

.formulario button {
  padding: 0 20px;
  color: #062033;
  font-weight: 800;
  border: 0;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--destaque), var(--sucesso));
}

.formulario button:disabled {
  cursor: wait;
  opacity: 0.55;
}

.barra {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin: 24px 0 16px;
}

.filtros {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.filtro {
  padding: 8px 11px;
  color: var(--texto-suave);
  border: 1px solid transparent;
  border-radius: 9px;
  background: transparent;
}

.filtro:hover,
.filtro.ativo {
  color: var(--texto);
  border-color: var(--borda);
  background: var(--painel-claro);
}

.resumo {
  color: var(--texto-suave);
  font-size: 0.88rem;
  white-space: nowrap;
}

.lista {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.tarefa {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 15px;
  border: 1px solid var(--borda);
  border-radius: 14px;
  background: rgba(24, 34, 56, 0.66);
  animation: entrar 220ms ease-out;
}

.tarefa:hover {
  border-color: rgba(56, 189, 248, 0.35);
}

.controle-check {
  display: grid;
  flex: 0 0 auto;
  place-items: center;
}

.tarefa-check {
  position: absolute;
  opacity: 0;
}

.check-visual {
  display: grid;
  width: 24px;
  height: 24px;
  place-items: center;
  border: 2px solid #64748b;
  border-radius: 8px;
  transition: 160ms;
}

.tarefa-check:focus-visible + .check-visual {
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.2);
}

.tarefa-check:checked + .check-visual {
  border-color: var(--sucesso);
  background: var(--sucesso);
}

.tarefa-check:checked + .check-visual::after {
  content: "✓";
  color: #052e2b;
  font-weight: 900;
}

.dados-tarefa {
  display: grid;
  min-width: 0;
  flex: 1;
  gap: 4px;
}

.tarefa-titulo {
  overflow-wrap: anywhere;
}

.tarefa-data {
  color: var(--texto-suave);
}

.tarefa.concluida .tarefa-titulo {
  color: var(--texto-suave);
  text-decoration: line-through;
}

.botao-excluir {
  padding: 8px 10px;
  color: var(--perigo);
  border: 1px solid transparent;
  border-radius: 9px;
  background: transparent;
}

.botao-excluir:hover {
  border-color: rgba(251, 113, 133, 0.24);
  background: rgba(251, 113, 133, 0.1);
}

.mensagem {
  margin: 28px 0 10px;
  color: var(--texto-suave);
  text-align: center;
}

.somente-leitor {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
}

@keyframes entrar {
  from {
    opacity: 0;
    transform: translateY(5px);
  }
}

@media (max-width: 620px) {
  .cabecalho,
  .conteudo {
    padding: 24px 20px;
  }

  .formulario {
    flex-direction: column;
  }

  .formulario button {
    padding: 13px;
  }

  .barra {
    align-items: flex-start;
    flex-direction: column;
  }

  .tarefa {
    align-items: flex-start;
  }
}