:root{
  --bs-primary: #0F766E;
  --bs-primary-rgb: 15, 118, 110;
  --bs-body-color: #0F172A;
  --bs-body-bg: #F8FAFC;
  --bs-border-radius: 0.5rem;
  --bs-border-radius-lg: 0.75rem;
  --bs-font-sans-serif: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;

  --primary-hover: #115E59;
  --primary-light: #CCFBF1;
  --primary-subtle: #F0FDFA;
  --text-secondary: #475569;
  --text-muted: #64748B;
  --border-color: #E2E8F0;
  --surface: #FFFFFF;
  --output-bg: #F8FAFC;
}

[data-bs-theme="dark"]{
  --bs-primary: #2DD4BF;
  --bs-primary-rgb: 45, 212, 191;
  --bs-body-color: #F8FAFC;
  --bs-body-bg: #0F172A;
  --primary-hover: #5EEAD4;
  --text-secondary: #CBD5E1;
  --text-muted: #94A3B8;
  --border-color: #475569;
  --surface: #1E293B;
  --output-bg: #172033;
}

body{ font-family: var(--bs-font-sans-serif); }

.site-navbar, .site-footer{
  background: var(--surface);
  border-color: var(--border-color) !important;
}

.card.tool-card{
  background: var(--surface);
  border-color: var(--border-color);
}

.cluster-card{
  background: var(--surface);
  border-color: var(--border-color);
  border-left: 4px solid var(--bs-primary);
}

.example-box{
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--primary-subtle);
  border-radius: var(--bs-border-radius);
  padding: 0.6rem 1rem;
}
[data-bs-theme="dark"] .example-box{
  background: rgba(45, 212, 191, 0.08);
}

.form-control, .form-select{
  border-color: var(--border-color);
}
.form-control:focus, .form-select:focus{
  border-color: var(--bs-primary);
  box-shadow: 0 0 0 0.2rem rgba(var(--bs-primary-rgb), 0.15);
}

/* Recolorir .btn-outline-secondary a teal via les variables natives del
   component (Bootstrap 5.3), en lloc de crear una classe de botó pròpia. */
/* Fix: Bootstrap 5.3 (CDN) "cou" el color de .btn-primary com a variable
   local del component (--bs-btn-bg), no com a referència a --bs-primary.
   Cal sobreescriure-la directament, igual que ja fem amb .btn-outline-secondary. */
.btn-primary{
  --bs-btn-bg: var(--bs-primary);
  --bs-btn-border-color: var(--bs-primary);
  --bs-btn-hover-bg: var(--primary-hover);
  --bs-btn-hover-border-color: var(--primary-hover);
  --bs-btn-active-bg: var(--primary-hover);
  --bs-btn-active-border-color: var(--primary-hover);
  --bs-btn-disabled-bg: var(--bs-primary);
  --bs-btn-disabled-border-color: var(--bs-primary);
  --bs-btn-focus-shadow-rgb: var(--bs-primary-rgb);
}

.btn-outline-secondary{
  --bs-btn-color: var(--bs-primary);
  --bs-btn-border-color: rgba(var(--bs-primary-rgb), 0.5);
  --bs-btn-hover-color: #fff;
  --bs-btn-hover-bg: var(--bs-primary);
  --bs-btn-hover-border-color: var(--bs-primary);
  --bs-btn-focus-shadow-rgb: var(--bs-primary-rgb);
  --bs-btn-active-color: #fff;
  --bs-btn-active-bg: var(--bs-primary);
  --bs-btn-active-border-color: var(--bs-primary);
  --bs-btn-disabled-color: var(--text-muted);
  --bs-btn-disabled-border-color: var(--border-color);
}

.output-box{
  background: var(--output-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--bs-border-radius);
  min-height: 200px;
  padding: 0.75rem;
  white-space: pre-wrap;
  word-break: break-word;
}

.system-badge{
  font-weight: 500;
  color: var(--bs-primary);
  background: var(--primary-subtle);
  border: 1px solid var(--primary-light);
}
[data-bs-theme="dark"] .system-badge{
  background: rgba(45, 212, 191, 0.12);
  border-color: rgba(45, 212, 191, 0.3);
}

.swap-btn{
  border-radius: 50%;
  width: 2.75rem;
  height: 2.75rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0;
}

@media (min-width: 768px){
  /* Desplaça el botó una mica avall perquè quedi centrat visualment
     respecte als textareas (que comencen sota el label "From"/"To"),
     no respecte a tota la columna. */
  .swap-col{ margin-top: 2.25rem; }
}

.text-secondary-custom{ color: var(--text-secondary); }
.text-muted-custom{ color: var(--text-muted); }

a.lang-card-link{ text-decoration: none; }
.lang-card, .feature-card{
  background: var(--surface);
  border: 1px solid rgba(var(--bs-primary-rgb), 0.25);
}
.lang-card:hover{ border-color: var(--bs-primary); }

.step-badge{
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 50%;
  background: var(--primary-subtle);
  color: var(--bs-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  border: 1px solid var(--primary-light);
}
[data-bs-theme="dark"] .step-badge{
  background: rgba(45, 212, 191, 0.12);
  border-color: rgba(45, 212, 191, 0.3);
}

.accordion-item{
  background: var(--surface);
  border-color: var(--border-color);
}
.accordion-button{
  background: var(--surface);
  color: var(--bs-body-color);
}
.accordion-button:not(.collapsed){
  color: var(--bs-primary);
  background-color: var(--primary-subtle);
  box-shadow: inset 0 -1px 0 var(--primary-light);
}
.accordion-button:focus{
  border-color: var(--bs-primary);
  box-shadow: 0 0 0 0.2rem rgba(var(--bs-primary-rgb), 0.15);
}
[data-bs-theme="dark"] .accordion-button:not(.collapsed){
  background-color: rgba(45, 212, 191, 0.12);
  box-shadow: inset 0 -1px 0 rgba(45, 212, 191, 0.3);
}

footer a{ color: var(--text-secondary); text-decoration: none; }
footer a:hover{ color: var(--bs-primary); }

:focus-visible{
  outline: 3px solid var(--bs-primary);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce){
  *, *::before, *::after{
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}