:root {
  --bg: #0f1117;
  --surface: #1a1d27;
  --surface-2: #232733;
  --border: #2d3240;
  --text: #e6e8ee;
  --muted: #8b91a3;
  --primary: #6366f1;
  --primary-hover: #5457e0;
  --danger: #ef4444;
  --success: #22c55e;
  --warning: #f59e0b;
  --radius: 12px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  -webkit-font-smoothing: antialiased;
}

.screen { min-height: 100vh; }

/* ---------- Pantalla de bloqueo ---------- */
#lock-screen {
  display: flex;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at 50% 30%, #1a1d2e, var(--bg));
}
.lock-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 40px;
  width: 360px;
  text-align: center;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}
.lock-card .logo { font-size: 56px; }
.lock-card h1 { margin: 8px 0 4px; font-size: 28px; }
.lock-card form { margin-top: 24px; display: flex; flex-direction: column; gap: 12px; }

/* ---------- Inputs y botones ---------- */
input, select, textarea {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  padding: 12px 14px;
  font-size: 14px;
  font-family: inherit;
  width: 100%;
  outline: none;
}
input:focus, select:focus, textarea:focus { border-color: var(--primary); }
textarea { resize: vertical; }

button {
  cursor: pointer;
  border: none;
  border-radius: 10px;
  padding: 12px 16px;
  font-size: 14px;
  font-weight: 600;
  font-family: inherit;
  transition: background 0.15s, opacity 0.15s;
}
button.primary { background: var(--primary); color: white; }
button.primary:hover { background: var(--primary-hover); }
button.ghost { background: var(--surface-2); color: var(--text); border: 1px solid var(--border); }
button.ghost:hover { background: var(--border); }
button.danger { background: transparent; color: var(--danger); border: 1px solid var(--danger); }
button.danger:hover { background: var(--danger); color: white; }

.muted { color: var(--muted); font-size: 14px; }
.error { color: var(--danger); font-size: 13px; min-height: 18px; margin: 8px 0 0; }
.warning {
  color: var(--warning);
  font-size: 12px;
  background: rgba(245, 158, 11, 0.1);
  border: 1px solid rgba(245, 158, 11, 0.3);
  border-radius: 10px;
  padding: 10px;
  margin-top: 16px;
}

/* ---------- App principal ---------- */
header {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px 20px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}
.brand { font-size: 18px; font-weight: 700; white-space: nowrap; }
header #search { flex: 1; max-width: 480px; }
.header-actions { display: flex; gap: 8px; margin-left: auto; }

#filters {
  display: flex;
  gap: 8px;
  padding: 16px 20px 4px;
  flex-wrap: wrap;
}
.filter {
  background: transparent;
  color: var(--muted);
  border: 1px solid var(--border);
  padding: 7px 14px;
  font-size: 13px;
}
.filter.active { background: var(--primary); color: white; border-color: var(--primary); }

main#items-list {
  padding: 16px 20px 60px;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 14px;
}
.empty { text-align: center; padding: 60px 20px; }

/* ---------- Tarjetas de items ---------- */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.card-head { display: flex; align-items: center; gap: 10px; }
.card-icon { font-size: 22px; }
.card-title { font-weight: 600; flex: 1; word-break: break-word; }
.badge {
  font-size: 11px;
  padding: 3px 8px;
  border-radius: 20px;
  background: var(--surface-2);
  color: var(--muted);
  white-space: nowrap;
}
.field {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  background: var(--surface-2);
  border-radius: 8px;
  padding: 8px 10px;
}
.field-label { color: var(--muted); min-width: 64px; }
.field-value { flex: 1; font-family: ui-monospace, SFMono-Regular, monospace; word-break: break-all; }
.field-value.secret { letter-spacing: 2px; }
.icon-btn {
  background: transparent;
  border: none;
  padding: 4px;
  font-size: 14px;
  cursor: pointer;
  opacity: 0.7;
}
.icon-btn:hover { opacity: 1; }
.codes-list { display: flex; flex-direction: column; gap: 4px; }
.code-chip {
  font-family: ui-monospace, monospace;
  font-size: 12px;
  background: var(--surface-2);
  padding: 5px 8px;
  border-radius: 6px;
  display: flex;
  justify-content: space-between;
  gap: 8px;
}
.code-chip.used { opacity: 0.4; text-decoration: line-through; }
.card-actions { display: flex; gap: 8px; margin-top: 4px; }
.card-actions button { padding: 7px 12px; font-size: 12px; }
.note-content { font-size: 13px; white-space: pre-wrap; color: var(--text); }

/* ---------- Modal ---------- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  z-index: 100;
}
.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 28px;
  width: 460px;
  max-width: 100%;
  max-height: 90vh;
  overflow-y: auto;
}
.modal h2 { margin: 0 0 20px; }
#item-form { display: flex; flex-direction: column; gap: 14px; }
#item-form label { display: flex; flex-direction: column; gap: 6px; font-size: 13px; color: var(--muted); }
.input-row { display: flex; gap: 8px; }
.input-row input { flex: 1; }
.modal-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 8px; }

/* ---------- Toast ---------- */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--success);
  color: white;
  padding: 12px 20px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 600;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s, transform 0.2s;
  z-index: 200;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.toast.error { background: var(--danger); }

/* ---------- Responsive: tablets y móviles ---------- */
@media (max-width: 720px) {
  main#items-list {
    grid-template-columns: 1fr; /* una sola columna */
    padding: 14px 14px 60px;
  }
  header {
    flex-wrap: wrap;
    gap: 10px;
    padding: 12px 14px;
  }
  .brand { font-size: 16px; }
  /* La búsqueda baja a una segunda fila y ocupa todo el ancho */
  header #search {
    order: 3;
    flex-basis: 100%;
    max-width: none;
  }
  .header-actions { margin-left: auto; }
  /* Los filtros pasan a scroll horizontal en vez de apilarse */
  #filters {
    padding: 12px 14px 4px;
    gap: 6px;
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
  #filters::-webkit-scrollbar { display: none; }
  .filter { white-space: nowrap; flex: 0 0 auto; }
}

@media (max-width: 480px) {
  /* Pantalla de bloqueo / setup */
  #lock-screen { padding: 16px; }
  .lock-card { width: 100%; max-width: 360px; padding: 32px 22px; }

  /* Modal a pantalla casi completa y botones apilados */
  .modal { padding: 22px 18px; border-radius: 14px; }
  .modal-actions { flex-direction: column-reverse; }
  .modal-actions button { width: 100%; }

  /* Objetivos táctiles más grandes */
  .icon-btn { padding: 7px; font-size: 16px; }
  .card-actions button { flex: 1; }
  .field-label { min-width: 52px; }

  /* Toast a lo ancho con márgenes */
  .toast {
    left: 16px;
    right: 16px;
    transform: translateY(20px);
  }
  .toast.show { transform: translateY(0); }
}