:root {
  --brand-green: #3b7a57;
  --brand-accent: #f4d35e;
}

.navbar-brand span {
  color: var(--brand-accent);
}

.form-select:focus,
.form-control:focus {
  border-color: var(--brand-green);
  box-shadow: 0 0 0 0.25rem rgba(59, 122, 87, 0.25);
  outline: none;
}

.app-title {
  color: var(--brand-green);
  font-weight: 700;
}
.app-title span {
  color: var(--brand-accent);
}

/* Flashcard container */
.flashcard {
  perspective: 1200px;
  width: 100%;
  max-width: 600px;
  margin: 0 auto 1rem;
}

/* Inner flipping element */
.flashcard-inner {
  position: relative;
  width: 100%;
  min-height: 300px;
  transform-style: preserve-3d;
  transition: transform 0.6s ease-in-out;
}

.flashcard.flipped .flashcard-inner {
  transform: rotateY(180deg);
}

/* Front & back faces */
.flashcard-front,
.flashcard-back {
  position: absolute;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  border: 1px solid #ddd;
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);

  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 1rem;
  font-size: 1.8rem;
}

.flashcard-front {
  color: #000;
}

.flashcard-back {
  transform: rotateY(180deg);
  color: var(--brand-green);
}

/* Child spacing */
.flashcard-front > *,
.flashcard-back > * {
  margin: 0.2rem 0;
}

/* IPA size tweak */
.flashcard-front .text-muted {
  font-size: 1.1rem;
}

/* Nav buttons container */
#navButtons {
  display: flex;
  flex-direction: row;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}

@media (max-width: 400px) {
  #navButtons {
    flex-direction: column;
    align-items: center;
  }

  #navButtons .btn {
    width: 100%;
    max-width: 250px;
  }
}

@media (max-width: 768px) {
  .app-title {
    font-size: 1.5rem;
  }
}

@media (max-width: 576px) {
  .app-title {
    display: none;
  }
}

/* Bootstrap overrides for brand green */
.text-success {
  color: var(--brand-green) !important;
}
.bg-success {
  background-color: var(--brand-green) !important;
}
.border-success {
  border-color: var(--brand-green) !important;
}

.btn-success {
  --bs-btn-color: #fff;
  --bs-btn-bg: var(--brand-green);
  --bs-btn-border-color: var(--brand-green);
  --bs-btn-hover-bg: #2f6046;
  --bs-btn-hover-border-color: #2f6046;
  --bs-btn-active-bg: #2a4d3a;
  --bs-btn-active-border-color: #2a4d3a;
  --bs-btn-disabled-bg: var(--brand-green);
  --bs-btn-disabled-border-color: var(--brand-green);
}

.btn-outline-success {
  --bs-btn-color: var(--brand-green);
  --bs-btn-border-color: var(--brand-green);
  --bs-btn-hover-bg: var(--brand-green);
  --bs-btn-hover-border-color: var(--brand-green);
  --bs-btn-hover-color: #fff;
}

.navbar.bg-success,
.bg-success.navbar {
  background-color: var(--brand-green) !important;
}

kbd {
  background-color: #e9ecef;
  color: #000;
  border-radius: 4px;
  padding: 2px 6px;
  font-size: 0.85em;
  border: 1px solid #ccc;
}

/* Remove focus outline for mouse/touch, keep for keyboard */
button:focus {
  outline: none;
}

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

.ko-fi-widget {
  margin-top: 1rem;
  text-align: center;
  font-family: inherit;
}

.ko-fi-widget iframe:hover {
  filter: brightness(1.1) drop-shadow(0 0 4px var(--brand-accent));
  transition: filter 0.2s ease-in-out;
}