/* Paleta de colores */
:root {
  --color-salmon: #f4a261;
  --color-cream: #e9f5b8;
  --color-mint: #8dd9c0;
  --color-teal: #14807e;
  --color-dark: #2c3e50;
  --color-light: #ffffff;
}

/* Reset y estilos base */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(
    135deg,
    var(--color-cream) 0%,
    var(--color-mint) 100%
  );
  min-height: 100vh;
  padding: 20px;
}

/* Header */
header {
  text-align: center;
  padding: 30px;
  background-color: var(--color-teal);
  color: var(--color-light);
  border-radius: 15px;
  margin-bottom: 30px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
  position: relative;
}

header h1 {
  font-size: 2.5em;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
}

/* Botón de reset */
.reset-btn {
  position: absolute;
  top: 20px;
  right: 20px;
  background-color: var(--color-salmon);
  color: var(--color-light);
  border: none;
  padding: 10px 20px;
  font-size: 1em;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 3px 8px rgba(0, 0, 0, 0.2);
}

.reset-btn:hover {
  background-color: var(--color-mint);
  color: var(--color-dark);
  transform: scale(1.1) rotate(180deg);
  box-shadow: 0 5px 12px rgba(0, 0, 0, 0.3);
}

/* Modal inicial */
.modal {
  background-color: var(--color-salmon);
  padding: 40px;
  border-radius: 20px;
  text-align: center;
  max-width: 500px;
  margin: 0 auto 30px;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.modal h2 {
  color: var(--color-light);
  margin-bottom: 20px;
  font-size: 2em;
}

.modal p {
  color: var(--color-dark);
  margin-bottom: 25px;
  font-size: 1.1em;
  line-height: 1.6;
}

.modal button {
  background-color: var(--color-teal);
  color: var(--color-light);
  border: none;
  padding: 15px 30px;
  font-size: 1.1em;
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

.modal button:hover {
  background-color: var(--color-mint);
  color: var(--color-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 15px rgba(0, 0, 0, 0.3);
}

/* Artículo principal */
.layer {
  background-color: var(--color-light);
  padding: 30px;
  border-radius: 15px;
  max-width: 600px;
  margin: 0 auto 30px;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
  display: none;
}

.layer.visible {
  display: block;
}

/* Sección piece */
.piece {
  background: linear-gradient(
    135deg,
    var(--color-cream) 0%,
    var(--color-light) 100%
  );
  padding: 25px;
  border-radius: 12px;
  margin-bottom: 20px;
  border: 3px solid var(--color-mint);
}

.piece ul {
  list-style: none;
}

.piece li {
  padding: 12px 15px;
  margin: 8px 0;
  border-radius: 8px;
  font-size: 1.1em;
  display: flex;
  align-items: center;
  justify-content: center;
}

.piece li.odd {
  background-color: var(--color-mint);
  color: var(--color-dark);
}

.piece li.even {
  background-color: var(--color-salmon);
  color: var(--color-light);
}

.piece img {
  max-width: 150px;
  border-radius: 50%;
  border: 4px solid var(--color-teal);
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

/* Botones de navegación */
.layer button {
  background-color: var(--color-teal);
  color: var(--color-light);
  border: none;
  padding: 12px 25px;
  margin: 5px;
  font-size: 1em;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.3s ease;
}

.layer button:hover {
  background-color: var(--color-salmon);
  transform: scale(1.05);
}

/* Secciones de fragmentos */
.piece-fragment,
.piece-fragmentId,
.piece-fragmentSurname,
.piece-filter {
  background-color: var(--color-light);
  padding: 25px;
  border-radius: 15px;
  max-width: 800px;
  margin: 20px auto;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
  display: none;
}

.piece-fragment.visible,
.piece-fragmentId.visible,
.piece-fragmentSurname.visible,
.piece-filter.visible {
  display: block;
}

/* Cajas de ordenación y filtro */
.box {
  background-color: var(--color-cream);
  padding: 25px;
  border-radius: 12px;
  text-align: center;
  max-width: 600px;
  margin: 20px auto;
  border: 3px solid var(--color-mint);
}

.box p,
.box label {
  color: var(--color-dark);
  font-size: 1.2em;
  margin-bottom: 15px;
  font-weight: bold;
}

.box button {
  background-color: var(--color-salmon);
  color: var(--color-light);
  border: none;
  padding: 12px 20px;
  margin: 5px;
  font-size: 1em;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.3s ease;
}

.box button:hover {
  background-color: var(--color-teal);
  transform: translateY(-2px);
}

.box input {
  padding: 10px;
  font-size: 1em;
  border: 2px solid var(--color-mint);
  border-radius: 8px;
  width: 100%;
  max-width: 300px;
  margin-top: 10px;
}

.box input:focus {
  outline: none;
  border-color: var(--color-teal);
  box-shadow: 0 0 8px rgba(20, 128, 126, 0.3);
}

/* Footer */
footer {
  text-align: center;
  padding: 20px;
  margin-top: 30px;
  color: var(--color-teal);
  font-size: 1.1em;
}

/* Clases de visibilidad */
.hide {
  display: none !important;
}

.visible {
  display: block;
}

/* Animaciones */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.visible {
  animation: fadeIn 0.5s ease;
}

/* Responsive */
@media (max-width: 768px) {
  header h1 {
    font-size: 1.8em;
  }

  .modal,
  .layer,
  .box {
    padding: 20px;
  }

  .piece li {
    font-size: 1em;
  }
}