/* Reinici, tipografia i accessibilitat bàsica (Pla §7.3, §7.6). Els components s'afegeixen més avall. */

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  min-block-size: 100vh;
  min-block-size: 100dvh;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: var(--text-base);
  font-weight: 400;
  line-height: 1.5;
  touch-action: manipulation;
  overflow-wrap: anywhere;
}

h1,
h2,
h3,
p {
  margin: 0;
}

h1,
h2,
h3 {
  font-weight: 700;
  line-height: 1.15;
}

h1 {
  font-size: var(--text-xl);
}

h2 {
  font-size: var(--text-lg);
}

a {
  color: var(--brand);
}

img,
svg {
  max-inline-size: 100%;
}

button,
input {
  font: inherit;
  color: inherit;
}

/* Camps ≥ 16 px: Safari a l'iPhone no amplia la pàgina en enfocar-los. */
input,
select,
textarea {
  font-size: max(1rem, 16px);
}

:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 2px;
}

/* El contenidor rep el focus per programa en canviar de pantalla; no és interactiu. */
#app:focus,
[tabindex='-1']:focus {
  outline: none;
}

.visually-hidden {
  position: absolute;
  inline-size: 1px;
  block-size: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  inset-block-start: var(--space-2);
  inset-inline-start: var(--space-2);
  z-index: 10;
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius);
  background: var(--brand);
  color: var(--on-brand);
  font-weight: 500;
  transform: translateY(-300%);
}

.skip-link:focus {
  transform: none;
}

.noscript {
  padding: var(--space-4);
  background: var(--danger-bg);
  color: var(--on-danger-bg);
  font-weight: 500;
}

/* Pantalla de càrrega estàtica (abans que l'app munti res). */
.splash {
  display: grid;
  place-items: center;
  min-block-size: 100vh;
  min-block-size: 100dvh;
  padding: var(--space-4);
}

.wordmark {
  padding: var(--space-3) var(--space-5);
  background: var(--brand);
  color: var(--on-brand);
  font-size: var(--text-xl);
  font-weight: 800;
  letter-spacing: 0.02em;
  line-height: 1;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* ---------- Components (Pla §7.4) ---------- */

.icon {
  flex: none;
  inline-size: 1.5rem;
  block-size: 1.5rem;
}

.icon-spinner {
  transform-origin: center;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* Camp de text */
.field {
  display: grid;
  gap: var(--space-2);
  min-inline-size: 0;
}

.field-label {
  font-weight: 500;
}

.field-control {
  display: flex;
  align-items: stretch;
  min-inline-size: 0;
}

.field-control input {
  flex: 1 1 auto;
  min-inline-size: 0;
  min-block-size: 3rem;
  padding: var(--space-2) var(--space-3);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--ink);
}

.field-control input[aria-invalid='true'] {
  border-color: var(--danger);
  border-width: 2px;
}

.field-hint {
  color: var(--ink-muted);
  font-size: var(--text-sm);
}

.field-error {
  color: var(--danger);
  font-weight: 500;
}

/* Camp de contrasenya: el botó d'ull queda enganxat al camp. */
.field-control:has(.field-toggle) input {
  border-start-end-radius: 0;
  border-end-end-radius: 0;
  border-inline-end-width: 0;
}

.field-toggle {
  flex: none;
  display: grid;
  place-items: center;
  inline-size: 3rem;
  min-inline-size: 44px;
  min-block-size: 44px;
  padding: 0;
  border: 1px solid var(--line-strong);
  border-start-end-radius: var(--radius);
  border-end-end-radius: var(--radius);
  background: var(--surface);
  color: var(--ink);
  cursor: pointer;
}

/* Botó */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  min-inline-size: 44px;
  min-block-size: 3rem;
  padding: var(--space-2) var(--space-5);
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-weight: 500;
  line-height: 1.2;
  cursor: pointer;
}

.btn-primary {
  background: var(--brand);
  color: var(--on-brand);
}

.btn-secondary {
  border-color: var(--line-strong);
  background: transparent;
  color: var(--ink);
}

.btn-text {
  background: transparent;
  color: var(--brand);
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.btn:disabled {
  cursor: progress;
  opacity: 0.7;
}

.btn-indicator {
  display: inline-flex;
}

@media (prefers-reduced-motion: reduce) {
  /* L'indicador passa a ser text: només queda el «Entrant…». */
  .btn-indicator {
    display: none;
  }
}

/* Banner */
.banner {
  display: grid;
  gap: var(--space-3);
  justify-items: start;
  padding: var(--space-3) var(--space-4);
  border-inline-start: 4px solid currentColor;
  border-radius: var(--radius);
}

.banner-text {
  font-weight: 500;
}

.banner-error {
  background: var(--danger-bg);
  color: var(--on-danger-bg);
}

.banner-ok {
  background: var(--ok-bg);
  color: var(--on-ok-bg);
}

.banner-info {
  background: var(--surface);
  color: var(--ink);
  border-inline-start-color: var(--brand);
}

/* Mosaic de l'accés (Pla D13, §7.5): peces separades per una junta del color del fons. */
.mosaic {
  display: block;
  inline-size: 100%;
  block-size: 100%;
}

.mosaic-tile {
  stroke: var(--paper);
  stroke-width: 4;
  stroke-linejoin: round;
  transform-box: fill-box;
  transform-origin: center;
  animation: settle 0.2s ease-out both;
}

.tile-c0 { fill: var(--tile-0); }
.tile-c1 { fill: var(--tile-1); }
.tile-c2 { fill: var(--tile-2); }
.tile-c3 { fill: var(--tile-3); }
.tile-c4 { fill: var(--tile-4); }

/* Retards escalonats (≈ 400 ms de diferència entre la primera i l'última peça + 200 ms d'animació). */
.tile-d0 { animation-delay: 0ms; }
.tile-d1 { animation-delay: 80ms; }
.tile-d2 { animation-delay: 160ms; }
.tile-d3 { animation-delay: 240ms; }
.tile-d4 { animation-delay: 320ms; }
.tile-d5 { animation-delay: 400ms; }

@keyframes settle {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .mosaic-tile {
    animation: none;
  }
}