/* === Cards === */
.card {
  background-color: var(--color-bg-secondary);
  border-radius: var(--radius-lg);
  padding: var(--space-md);
  border: 1px solid var(--color-border);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
  transition: var(--transition-base);
}

.card:active {
  transform: scale(0.98);
}

/* === Buttons === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-md);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition-base);
  gap: 0.5rem;
  width: 100%;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-accent-primary), #6366F1);
  color: white;
  box-shadow: 0 4px 15px var(--color-accent-glow);
}

.btn-primary:hover {
  filter: brightness(1.1);
}

.btn-secondary {
  background-color: var(--color-bg-tertiary);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
}

/* Rounded Icon Button */
.btn-icon {
  width: 3.5rem;
  height: 3.5rem;
  border-radius: var(--radius-full);
  padding: 0;
}

/* === Inputs === */
.input-group {
  margin-bottom: var(--space-md);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.input-label {
  font-size: var(--font-size-xs);
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 600;
}

.input-field {
  width: 100%;
  background-color: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 0.875rem 1rem;
  color: var(--color-text-primary);
  transition: var(--transition-fast);
}

.input-field:focus {
  border-color: var(--color-accent-primary);
  background-color: var(--color-bg-hover);
}

/* === Badges === */
.badge {
  padding: 0.25rem 0.6rem;
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: 700;
  text-transform: uppercase;
}

.badge-pending {
  background-color: rgba(250, 204, 21, 0.15);
  color: var(--color-accent-yellow);
}

.badge-paid {
  background-color: rgba(74, 222, 128, 0.15);
  color: var(--color-accent-green);
}

/* === Navbar === */
.navbar {
  position: fixed;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  max-width: var(--max-width-mobile);
  height: var(--navbar-height);
  background-color: rgba(13, 15, 20, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-top: 1px solid var(--color-border);
  display: flex;
  justify-content: space-around;
  align-items: center;
  z-index: 1000;
  padding-bottom: env(safe-area-inset-bottom);
}

.nav-item {
  color: var(--color-text-secondary);
  display: flex;
  flex-direction: column;
  align-items: center;
  font-size: 0.65rem;
  gap: 0.25rem;
  font-weight: 500;
  transition: var(--transition-fast);
}

.nav-item.active {
  color: var(--color-neon-green, #2ee55f);
  filter: drop-shadow(0 0 6px rgba(46, 229, 95, 0.45));
}

.nav-center-btn {
  background: linear-gradient(135deg, var(--color-accent-primary), #6366F1);
  color: white;
  width: 3.25rem;
  height: 3.25rem;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: -2.5rem;
  box-shadow: 0 10px 20px rgba(124, 92, 252, 0.3);
}

/* === Toasts === */
.toast {
  position: fixed;
  top: 2rem;
  left: 50%;
  transform: translateX(-50%) translateY(-20px);
  background-color: var(--color-bg-secondary);
  border: 1px solid var(--color-accent-primary);
  border-radius: var(--radius-md);
  padding: 1rem 1.5rem;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  z-index: 2000;
  opacity: 0;
  transition: var(--transition-slow);
}

.toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}