/* ==========================================================================
   Buttons — MBA ACT
   Source: Figma component set (node 4179:8871)
   Styles: Primary (filled), Secondary (outlined), Link (text-only)
   Sizes: Default, Small, Tiny
   Color modes: light-bg and dark-bg (.scheme-navy / .scheme-tangerine)
   ========================================================================== */

/* --------------------------------------------------------------------------
   Base — shared by all buttons
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  gap: 12px;
  font-family: var(--font-family);
  font-weight: var(--font-weight-bold);
  font-size: 1rem; /* 16px */
  line-height: 1;
  text-decoration: none;
  border: 2px solid transparent;
  border-radius: var(--radius-xs); /* 2px */
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
  white-space: nowrap;
}

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

.btn:disabled,
.btn[aria-disabled="true"] {
  opacity: 0.4;
  cursor: not-allowed;
  pointer-events: none;
}

/* Icon inside button */
.btn .material-symbols-outlined {
  font-size: 24px;
  line-height: 1;
}

/* --------------------------------------------------------------------------
   Sizes
   -------------------------------------------------------------------------- */

/* Default */
.btn {
  padding: 10px 24px;
}

/* Small */
.btn--sm {
  padding: 8px 20px;
  line-height: 1.5;
}

/* Tiny (filter reset style) */
.btn--tiny {
  padding: 4px 8px;
  font-size: 0.75rem; /* 12px */
  font-weight: var(--font-weight-normal);
  gap: 8px;
  border-width: 1px;
}

.btn--tiny .material-symbols-outlined {
  font-size: 14px;
}

/* --------------------------------------------------------------------------
   Primary — filled tangerine, white text
   -------------------------------------------------------------------------- */
.btn--primary {
  background-color: var(--color-tangerine);
  border-color: var(--color-tangerine);
  /* Figma: white on tangerine. Contrast 2.62:1 fails WCAG AA; client-
     confirmed design-over-AA for the brand primary button. */
  color: var(--color-white);
}

.btn--primary:hover {
  background-color: var(--color-tangerine-dark);
  border-color: var(--color-tangerine-dark);
  color: var(--color-white);
}

.btn--primary:active {
  background-color: var(--color-tangerine-darker);
  border-color: var(--color-tangerine-darker);
  color: var(--color-white);
}

/* --------------------------------------------------------------------------
   Secondary — outlined, light bg (navy border + text)
   -------------------------------------------------------------------------- */
.btn--secondary {
  background-color: var(--color-white);
  border-color: var(--color-navy);
  color: var(--color-navy);
}

.btn--secondary:hover {
  background-color: var(--color-navy);
  color: var(--color-white);
}

.btn--secondary:active {
  background-color: var(--color-navy-dark);
  border-color: var(--color-navy-dark);
  color: var(--color-white);
}

/* Secondary — dark bg variant (white border + text) */
.scheme-navy .btn--secondary,
.btn--secondary.btn--alt {
  background-color: transparent;
  border-color: var(--color-white);
  color: var(--color-white);
}

.scheme-navy .btn--secondary:hover,
.btn--secondary.btn--alt:hover {
  background-color: var(--color-white);
  color: var(--color-navy);
}

.scheme-navy .btn--secondary:active,
.btn--secondary.btn--alt:active {
  background-color: var(--color-neutral-lightest);
  border-color: var(--color-neutral-lightest);
  color: var(--color-navy);
}

/* Tiny secondary — tangerine-light border */
.btn--tiny.btn--secondary {
  background-color: transparent;
  border-color: var(--color-tangerine-light);
  color: var(--color-tangerine);
}

.btn--tiny.btn--secondary:hover {
  background-color: var(--color-tangerine-lightest);
}

/* --------------------------------------------------------------------------
   Link — text-only, no bg/border
   -------------------------------------------------------------------------- */
.btn--link {
  background-color: transparent;
  border-color: transparent;
  color: var(--color-navy);
  padding-left: 0;
  padding-right: 0;
  gap: 8px;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.15em;
}

.btn--link:hover {
  color: var(--color-tangerine);
}

.btn--link:active {
  color: var(--color-tangerine-dark);
}

/* Link — tangerine variant */
.btn--link.btn--tangerine {
  color: var(--color-tangerine);
}

.btn--link.btn--tangerine:hover {
  color: var(--color-tangerine-dark);
}

/* Link — dark bg variant (white text) */
.scheme-navy .btn--link,
.btn--link.btn--alt {
  color: var(--color-white);
}

.scheme-navy .btn--link:hover,
.btn--link.btn--alt:hover {
  color: var(--color-tangerine-light);
}

/* --------------------------------------------------------------------------
   Icon-only buttons
   -------------------------------------------------------------------------- */
.btn--icon {
  padding: 8px;
  gap: 0;
}

.btn--icon .btn__label {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
}