:root{
  --bg-1: #0b0f14;
  --bg-2: #0f1e2e;
  --card: #12273c;
  --text: #eaf2ff;
  --muted: #a9bdd8;
  --accent: #1f6feb;
  --accent-2: #48c0e3;
  --danger: #dc3545;
  --success: #2ea043;
  --shadow: rgba(0,0,0,0.35);
}

*{ box-sizing: border-box; }

html, body{
  height: 100%;
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, "Helvetica Neue", Arial, "Noto Sans", "Liberation Sans", sans-serif;
  color: var(--text);
  background:
    radial-gradient(1200px 600px at 20% -20%, rgba(72,192,227,0.12), transparent 60%),
    linear-gradient(180deg, var(--bg-2), var(--bg-1));
}

.app{
  min-height: 100%;
  max-width: 860px;
  margin: 0 auto;
  padding: 48px 20px 64px;
  display: flex;
  flex-direction: column;
  align-items: center;       /* centraliza conteúdo */
  text-align: center;        /* centraliza texto */
}

.app__header{
  margin-bottom: 24px;
}

.app__title{
  margin: 0 0 8px;
  font-size: 2.25rem;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  text-shadow: 0 6px 20px var(--shadow);
}

.app__subtitle{
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.input-bar{
  width: 100%;
  display: grid;
  grid-template-columns: 1fr 180px 180px;
  gap: 12px;
  background: rgba(18,39,60,0.6);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 16px;
  padding: 14px;
  backdrop-filter: blur(6px);
  box-shadow: 0 12px 24px var(--shadow);
  margin-top: 20px;
}

.input{
  width: 100%;
  height: 44px;
  border: 1px solid rgba(255,255,255,0.08);
  background: #0e1e30;
  color: var(--text);
  border-radius: 12px;
  padding: 0 12px;
  outline: none;
  transition: border-color 160ms ease, box-shadow 160ms ease;
}

.input::placeholder{ color: #89a2c0; }

.input:focus{
  border-color: var(--accent-2);
  box-shadow: 0 0 0 3px rgba(72,192,227,0.2);
}

.btn{
  height: 44px;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  padding: 0 16px;
  font-weight: 600;
  letter-spacing: 0.2px;
  background: var(--card);
  color: var(--text);
  transition: transform 80ms ease, filter 160ms ease, background 160ms ease;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.06), 0 8px 16px var(--shadow);
}

.btn:hover{ filter: brightness(1.05); }
.btn:active{ transform: translateY(1px); }

.btn--primary{
  background: linear-gradient(180deg, var(--accent-2), var(--accent));
  color: #06101a;
  text-shadow: 0 1px 0 rgba(255,255,255,0.25);
}

.btn--danger{ background: linear-gradient(180deg, #ff6b7d, var(--danger)); }
.btn--success{ background: linear-gradient(180deg, #6ee7a0, var(--success)); }

.lista{
  width: 100%;
  margin-top: 28px;
  display: grid;
  gap: 12px;
}

.lista__vazio{
  color: var(--muted);
  background: rgba(18,39,60,0.5);
  border: 1px dashed rgba(255,255,255,0.12);
  border-radius: 14px;
  padding: 18px 14px;
}

.item{
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 12px;
  background: linear-gradient(180deg, #0e1e30, #0c1725);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 16px;
  padding: 14px;
  box-shadow: 0 10px 18px var(--shadow);
}

.item__info{
  text-align: left;                  
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.item__nome{
  font-weight: 700;
  font-size: 1.02rem;
}

.item__data{
  font-size: 0.9rem;
  color: var(--muted);
}

.item__acoes{
  display: flex;
  gap: 8px;
}

.item--concluida{
  opacity: 0.85;
  background: linear-gradient(180deg, #0b1a2a, #0a1622);
  border-color: rgba(72,192,227,0.25);
}

.item--concluida .item__nome{
  text-decoration: line-through;
  color: #9bb8d8;
}

@media (max-width: 720px){
  .input-bar{
    grid-template-columns: 1fr 1fr;
  }
  #btn-adicionar{
    grid-column: 1 / -1;
  }
}

.item--concluida .item__nome{
  text-decoration: line-through;
  color: #2ea043; 
}

.item--concluida .item__nome::after{
  content: " ✓";
  font-weight: bold;
  margin-left: 6px;
  color: #2ea043;
}

.input-date {
  height: 44px;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,0.08);
  background: #1a1a2e;     
  color: var(--text);       
  padding: 0 12px;
  font-size: 1rem;
  outline: none;
}

.input-date::-webkit-calendar-picker-indicator {
  filter: invert(1);        
}

.input-date:focus {
  border-color: var(--accent-2);
}