/* Variables CSS */
:root {
  --color-fons: #121213;
  --color-text: #ffffff;
  --color-text-secundari: #818384;
  --color-vora: #3a3a3c;
  --color-accent: #538d4e;
  --color-accent-hover: #6aad5f;
  --color-error: #c9534a;
  --color-lletra: #ffffff;
  --color-lletra-usada: #538d4e;
  --color-lletra-hover: #b0b0b0;
  --color-linia: #f5c242;
  --color-linia-antiga: #6a6a6c;
  --max-amplada: 500px;
}

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

body {
  font-family: 'Clear Sans', 'Helvetica Neue', Arial, sans-serif;
  background-color: var(--color-fons);
  color: var(--color-text);
  min-height: 100vh;
  display: flex;
  justify-content: center;
}

.container {
  width: 100%;
  max-width: var(--max-amplada);
  padding: 0 16px;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* Capçalera */
header {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 16px 0;
  border-bottom: 1px solid var(--color-vora);
  position: relative;
}

header h1 {
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: 0.05rem;
  text-transform: uppercase;
}

.header-buttons {
  position: absolute;
  right: 0;
  display: flex;
  gap: 8px;
}

.icon-btn {
  background: transparent;
  border: none;
  color: var(--color-text);
  font-size: 1.2rem;
  cursor: pointer;
  padding: 8px;
  border-radius: 4px;
  transition: background-color 0.2s;
}

.icon-btn:hover {
  background-color: var(--color-vora);
}

/* Selector de mode */
.mode-selector {
  display: flex;
  justify-content: center;
  gap: 8px;
  padding: 16px 0;
}

.mode-btn {
  background: transparent;
  border: 2px solid var(--color-vora);
  color: var(--color-text);
  padding: 10px 20px;
  border-radius: 20px;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 600;
  transition: all 0.2s;
}

.mode-btn:hover {
  border-color: var(--color-text-secundari);
}

.mode-btn.active {
  background: var(--color-accent);
  border-color: var(--color-accent);
}

.hidden {
  display: none !important;
}

/* Main */
main {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 16px 0;
  gap: 16px;
}

/* Quadrat SVG */
.quadrat-container {
  width: 100%;
  max-width: 300px;
  aspect-ratio: 1;
}

.quadrat {
  width: 100%;
  height: 100%;
}

.lletra-cercle {
  fill: var(--color-fons);
  stroke: var(--color-vora);
  stroke-width: 2;
  cursor: pointer;
  transition: all 0.15s ease;
}

.lletra-cercle:hover {
  fill: var(--color-vora);
}

.lletra-cercle.seleccionada {
  fill: var(--color-linia);
  stroke: var(--color-linia);
}

.lletra-cercle.usada {
  stroke: var(--color-lletra-usada);
}

.lletra-text {
  fill: var(--color-lletra);
  font-family: 'Clear Sans', 'Helvetica Neue', Arial, sans-serif;
  font-size: 18px;
  font-weight: 700;
  text-anchor: middle;
  dominant-baseline: central;
  pointer-events: none;
  text-transform: uppercase;
}

.lletra-text.usada {
  fill: var(--color-lletra-usada);
}

.linia-trac {
  stroke: var(--color-linia);
  stroke-width: 3;
  stroke-linecap: round;
  fill: none;
  opacity: 0.8;
}

.linia-trac.antiga {
  stroke: var(--color-linia-antiga);
  opacity: 0.4;
}

/* Entrada de paraula */
.entrada-container {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.paraula-actual {
  min-height: 48px;
  font-size: 1.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1rem;
  color: var(--color-text);
  text-align: center;
  padding: 8px 16px;
  border-bottom: 2px solid var(--color-vora);
  min-width: 200px;
}

.paraula-actual.error {
  animation: shake 0.5s ease;
  color: var(--color-error);
}

.entrada-accions {
  display: flex;
  gap: 12px;
}

.accio-btn {
  background: transparent;
  border: 1px solid var(--color-vora);
  color: var(--color-text);
  padding: 12px 24px;
  border-radius: 8px;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 600;
  transition: all 0.2s;
}

.accio-btn:hover:not(:disabled) {
  background-color: var(--color-vora);
}

.accio-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.accio-btn.btn-primari {
  background: var(--color-accent);
  border-color: var(--color-accent);
}

.accio-btn.btn-primari:hover:not(:disabled) {
  background: var(--color-accent-hover);
  border-color: var(--color-accent-hover);
}

.accio-btn.btn-primari:disabled {
  background: var(--color-vora);
  border-color: var(--color-vora);
}

/* Indicador de lletres */
.lletres-indicador {
  font-size: 0.9rem;
  color: var(--color-text-secundari);
}

#lletres-usades {
  color: var(--color-accent);
  font-weight: 700;
}

/* Llista de paraules */
.paraules-llista {
  width: 100%;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  padding: 8px 0;
}

.paraula-enviada {
  background: var(--color-vora);
  padding: 8px 16px;
  border-radius: 20px;
  font-size: 0.9rem;
  font-weight: 600;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 8px;
}

.paraula-enviada .connector {
  color: var(--color-linia);
  font-size: 0.8rem;
}

/* Missatge */
.missatge {
  background: var(--color-text);
  color: var(--color-fons);
  padding: 12px 24px;
  border-radius: 4px;
  font-weight: 600;
  text-align: center;
  animation: apareixer 0.3s ease;
}

.missatge.error {
  background: var(--color-error);
  color: var(--color-text);
}

@keyframes apareixer {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-8px); }
  40% { transform: translateX(8px); }
  60% { transform: translateX(-8px); }
  80% { transform: translateX(8px); }
}

/* Modals */
.modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.7);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 100;
}

.modal-content {
  background: var(--color-fons);
  border: 1px solid var(--color-vora);
  border-radius: 8px;
  padding: 24px;
  max-width: 90%;
  width: 400px;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
}

.modal-close {
  position: absolute;
  top: 12px;
  right: 16px;
  background: none;
  border: none;
  color: var(--color-text);
  font-size: 1.5rem;
  cursor: pointer;
}

.modal h2 {
  text-align: center;
  margin-bottom: 16px;
}

.modal h3 {
  margin-top: 16px;
  margin-bottom: 8px;
  font-size: 1rem;
}

.modal p {
  margin-bottom: 12px;
  line-height: 1.5;
}

.modal ul {
  margin-left: 20px;
  margin-bottom: 12px;
}

.modal li {
  margin-bottom: 6px;
  line-height: 1.4;
}

/* Estadístiques */
.estadistiques-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
  margin-bottom: 24px;
}

.estadistica {
  text-align: center;
}

.estadistica .valor {
  font-size: 1.8rem;
  font-weight: 700;
}

.estadistica .etiqueta {
  font-size: 0.7rem;
  color: var(--color-text-secundari);
}

.distribucio {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.distribucio-fila {
  display: flex;
  align-items: center;
  gap: 8px;
}

.distribucio-fila .num {
  width: 20px;
  text-align: right;
  font-weight: 600;
}

.distribucio-fila .barra {
  height: 20px;
  background: var(--color-accent);
  border-radius: 2px;
  min-width: 8px;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  padding-right: 6px;
  font-size: 0.75rem;
  font-weight: 600;
}

/* Modal victòria */
.victoria-paraules {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  margin: 16px 0;
}

.victoria-paraules .paraula {
  background: var(--color-accent);
  padding: 8px 16px;
  border-radius: 4px;
  font-weight: 600;
  text-transform: uppercase;
}

.compartir-btn {
  width: 100%;
  background: var(--color-accent);
  border: none;
  color: var(--color-text);
  padding: 16px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 1.1rem;
  font-weight: 700;
  transition: opacity 0.2s;
}

.compartir-btn:hover {
  opacity: 0.9;
}

.missatge-compartir {
  text-align: center;
  margin-top: 12px;
  color: var(--color-accent);
  font-weight: 600;
}

/* Responsive */
@media (max-width: 400px) {
  header h1 {
    font-size: 1.4rem;
  }

  .quadrat-container {
    max-width: 260px;
  }

  .paraula-actual {
    font-size: 1.5rem;
  }

  .accio-btn {
    padding: 10px 18px;
    font-size: 0.9rem;
  }

  .mode-btn {
    padding: 8px 14px;
    font-size: 0.8rem;
  }

  .estadistiques-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}