@import url('https://fonts.googleapis.com/css2?family=Special+Elite&family=Courier+Prime:wght@400;700&display=swap');

:root {
  --sage-light: #cad2c5;
  --green-mid: #84a98d;
  --green-dark: #517970;
  --dark: #364f53;
  --cream: #e9edca;

  --bg: var(--cream);
  --text: var(--dark);
  --accent: var(--green-dark);
  --error: #a3413a;
}
 
* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: 'Courier Prime', 'Courier New', monospace;
  background: var(--bg);
  color: var(--text);
}

header, footer {
  text-align: center;
  padding: 1.5rem;
  background: var(--dark);
  color: var(--cream);
}

header h1 {
  margin-bottom: 0.25rem;
  font-family: 'Special Elite', 'Courier New', monospace;
  color: var(--cream);
  letter-spacing: 0.5px;
}

header p {
  color: var(--sage-light);
  margin: 0;
}

footer {
  font-size: 0.85rem;
}

main {
  max-width: 1800px;
  margin: 0 auto;
  padding: 1.5rem 5rem 3rem;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

@media (max-width: 900px) {
  main {
    padding: 1.5rem 1.5rem 3rem;
  }
}

/* ---- Secciones sin recuadro ---- */
.card {
  background: transparent;
  border: none;
  padding: 0;
}

.card h2 {
  margin-top: 0;
  font-family: 'Special Elite', 'Courier New', monospace;
  color: var(--green-dark);
  border-bottom: none;
  padding-bottom: 0;
  font-size: 1.4rem;
}

/* ---- Alfabeto: fila completa arriba ---- */
#section-alphabet {
  width: 100%;
}

/* ---- Cifrado (izquierda) y Descifrado (derecha), más anchas ---- */
.two-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}

@media (max-width: 720px) {
  .two-columns {
    grid-template-columns: 1fr;
  }
}

label {
  display: block;
  margin-top: 0.75rem;
  margin-bottom: 0.25rem;
  font-weight: 700;
  color: var(--dark);
}

input[type="text"],
input[type="number"],
select,
textarea {
  width: 100%;
  padding: 0.6rem;
  border-radius: 4px;
  border: 1px solid var(--green-mid);
  background: #ffffff;
  color: var(--text);
  font-family: 'Courier Prime', 'Courier New', monospace;
  font-size: 1rem;
}

input:focus,
select:focus,
textarea:focus {
  outline: 2px solid var(--green-dark);
}

textarea {
  resize: vertical;
}

/* ---- Stepper personalizado para el shift de César ---- */
.shift-stepper {
  display: flex;
  align-items: stretch;
  gap: 0;
  margin-top: 0.25rem;
}

#encrypt-shift {
  text-align: center;
  font-size: 1.4rem;
  font-weight: 700;
  border-radius: 4px 0 0 4px;
  border-right: none;
  /* Ocultar flechas nativas: usamos las nuestras, más visibles */
  appearance: textfield;
}

#encrypt-shift::-webkit-inner-spin-button,
#encrypt-shift::-webkit-outer-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.stepper-buttons {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--green-mid);
  border-left: none;
  border-radius: 0 4px 4px 0;
  overflow: hidden;
}

.stepper-buttons button {
  margin: 0;
  padding: 0;
  width: 2.6rem;
  height: 1.55rem;
  border: none;
  border-radius: 0;
  background: var(--green-mid);
  color: var(--dark);
  font-size: 1rem;
  line-height: 1;
  font-weight: 900;
  cursor: pointer;
}

.stepper-buttons button:first-child {
  border-bottom: 1px solid var(--dark);
}

.stepper-buttons button:hover {
  background: var(--green-dark);
  color: #ffffff;
}

.button-row {
  display: flex;
  gap: 0.5rem;
  margin-top: 0.75rem;
  flex-wrap: wrap;
}

button {
  margin-top: 1rem;
  padding: 0.6rem 1.2rem;
  border: none;
  border-radius: 4px;
  background: var(--green-dark);
  color: #ffffff;
  font-family: 'Courier Prime', 'Courier New', monospace;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.15s ease;
}

button:hover {
  background: var(--dark);
}

button.secondary {
  background: var(--sage-light);
  color: var(--dark);
}

button.secondary:hover {
  background: var(--green-mid);
}

button.copy-btn {
  margin-top: 0.5rem;
  padding: 0.35rem 0.8rem;
  font-size: 0.85rem;
  background: var(--green-mid);
  color: var(--dark);
}

button.copy-btn:hover {
  background: var(--green-dark);
  color: #ffffff;
}

.error {
  color: var(--error);
  min-height: 1.2rem;
  font-size: 0.9rem;
}

.hint {
  font-size: 0.85rem;
  color: var(--green-dark);
}

.result-box {
  margin-top: 1.25rem;
  padding: 1rem 0 0 0;
  background: transparent;
  border: none;
  border-top: 1px dashed var(--green-mid);
  border-radius: 0;
}

pre {
  white-space: pre-wrap;
  word-break: break-word;
  font-family: 'Courier Prime', 'Courier New', monospace;
  margin: 0.5rem 0;
}

#current-alphabet {
  background: #ffffff;
  padding: 0.5rem;
  border-radius: 4px;
  border: 1px solid var(--green-mid);
}